MEAN WELL LCM-40 series: 3-in-1 dimming constant-current LED driver - LCM-40

Description

MEAN WELL LCM-40

MEAN WELL LCM-40 is a 40 W-class multiple-stage constant-current LED driver with 3-in-1 dimming. 42 W catalog rating; each setting must also remain within its LED-voltage window. Select the DIP current and matching LED voltage before use. Designed for indoor, office, architectural and panel lighting.

Output and selection

Parameter Specification
Model and operating mode LCM-40; multiple-stage constant-current AC/DC LED driver. Standard model with 3-in-1 dim-to-off control.
Rated output power 42 W catalog rating; each setting must also remain within its LED-voltage window.
Output current and voltage DIP-selected output, factory default 700 mA. Match the LED forward voltage to the selected row below; a power rating does not override its voltage limit.
Current ripple and tolerance Ripple: 5% maximum at rated current; measured at 60–100% of maximum output voltage under rated power delivery. Current tolerance: ±5%.
Typical efficiency 91%, measured at 500 mA / 80 V output selected by DIP. General test basis: 230 VAC, rated current, 25°C ambient; PF/THD/efficiency plots use Tcase 80°C.
Startup time 500 ms at 230 VAC, first cold start; repeated ON/OFF may increase startup time.
Auxiliary DC output Nominal 12 V, deviation 11.4–12.6 V, at 50 mA; +FAN/−FAN terminals can supply an external fan.

DIP current settings

Parameter Specification
350 mA 2–100 VDC; maximum open-circuit voltage 110 V. DIP 1/2/3/4/5/6: OFF / OFF / OFF / OFF / OFF / OFF.
500 mA 2–80 VDC; maximum open-circuit voltage 110 V. DIP 1/2/3/4/5/6: ON / OFF / OFF / OFF / OFF / OFF.
600 mA 2–67 VDC; maximum open-circuit voltage 110 V. DIP 1/2/3/4/5/6: ON / ON / OFF / OFF / OFF / OFF.
700 mA (default) 2–57 VDC; maximum open-circuit voltage 65 V. DIP 1/2/3/4/5/6: ON / ON / ON / OFF / OFF / ON.
900 mA 2–45 VDC; maximum open-circuit voltage 65 V. DIP 1/2/3/4/5/6: ON / ON / ON / ON / OFF / ON.
1050 mA 2–40 VDC; maximum open-circuit voltage 65 V. DIP 1/2/3/4/5/6: ON / ON / ON / ON / ON / ON.

Control and commissioning

Parameter Specification
Dimming inputs Use 0–10 VDC, 10 V PWM at 100 Hz–3 kHz, or resistance between DIM+ and DIM−. Dimming source current: 100 μA typical. Connect directly to LEDs, not to additional drivers. Never connect DIM− to −V.
Dimming range Minimum dimming level about 6%; output is undefined between 0% and 6%. Output can reach 0% with approximately 0 kΩ, 0 VDC, or 0% PWM duty. Resistance full scale is 100 kΩ/N, where N is the number of drivers in synchronized dimming. Do not activate temperature compensation during dimming.
Synchronization Up to 10 drivers: 1 master + 9 slaves. Dimming operating range 10–100%; minimum also depends on the dimmer setting. Flat synchronization cable <5 m, 22–24 AWG (0.2–0.3 mm²). Set every unit to 100% dimming before connecting. Synchronization is a control connection, not parallel connection of LED power outputs.
External NTC compensation Connect a temperature-sensing NTC resistor across +NTC / −NTC at the LED or surrounding sensing point. With no NTC, normal operation follows the DIP-selected current. Reference resistances: 220 kΩ holds 100% below 60°C and reduces current above 60°C; 330 kΩ uses 70°C; 470 kΩ uses 80°C. Follow the respective continuous derating curves.
NTC compatibility and control limits Reference measurements use THINKING TTC03 series; MEAN WELL does not supply the NTC resistor. Check the temperature curve before substituting another make. Dimming and synchronization are invalid while temperature compensation is in use.

Input and protection

Parameter Specification
Input supply 180–295 VAC; 254–417 VDC; 47–63 Hz AC. Active PFC.
Power factor and THD Typical PF ≥0.975 at 230 VAC; ≥0.96 at 277 VAC, full load. THD <20% at load ≥75%.
Typical AC current 0.23 A / 230 VAC; 0.2 A / 277 VAC.
Inrush and breaker reference Cold-start inrush: 20 A typical at 230 VAC; width 260 μs at 50% Ipeak, per NEMA 410. Catalog 16 A circuit-breaker loading at 230 VAC: 26 type B / 44 type C units. Confirm the actual installation and breaker.
Leakage and standby Leakage <0.5 mA at 240 VAC. Standby <1 W measured at 180–230 VAC.
Short circuit Constant-current limiting; automatically recovers after the fault is removed.
Overtemperature Output shuts down; reapply power to recover.
Overvoltage protection 110–130 V; output shuts down; reapply power to recover.

Operating limits

Parameter Specification
Temperature and cooling Free-air convection. Tcase −30 to +90°C; maximum case temperature +90°C. Horizontal mounting ambient curve: 1050 mA: ambient limit 40°C at full load; the graph ends there for these settings. Other listed settings: full load through 50°C, then derate to 60% at 60°C. Case and ambient temperatures are different limits.
Input and altitude derating At 60 Hz: 80% load at 180 VAC, rising to 100% at 200 VAC, remaining 100% through 295 VAC. Apply thermal limits concurrently. Above 2000 m, reduce permissible ambient temperature by 3.5°C per additional 1000 m for this fanless driver.
Humidity, storage and coefficient Operating: 20–90% RH, non-condensing. Storage: −40 to +80°C, 10–95% RH. Temperature coefficient ±0.03%/°C over 0–40°C.
Vibration and MTBF Vibration 10–500 Hz, 2 G, 10 minutes/cycle, 60 minutes on each X/Y/Z axis. MTBF 2397.0 / 260.6 thousand hours minimum, Telcordia SR-332 / MIL-HDBK-217F at 25°C, respectively.

Safety and installation conditions

Parameter Specification
Construction Plastic housing, Class II, no FG; SELV output.
Safety approval scope UL8750; CSA C22.2 No.250.13-12; ENEC BS EN/EN61347-1 and -2-13; BS EN/EN62384 independent; GB/T19510.1 and GB/T19510.213; BIS IS15885; EAC TP TC 004, as listed in the catalog.
Insulation Input–output withstand 3.75 kVAC. Input–output insulation resistance >100 MΩ at 500 VDC, 25°C and 70% RH.
EMC BS EN/EN55015; BS EN/EN61000-3-2 Class C at load ≥40%; BS EN/EN61000-3-3; GB/T17743; GB17625.1; EAC TP TC 020. Immunity: BS EN/EN61000-4-2, -3, -4, -5, -6, -8, -11 and BS EN/EN61547, light-industry level, line-to-line surge 2 kV. Requalify EMC on the complete final installation.
ErP installation condition The 2026-02-09 catalog states this driver must be installed behind a switch, without permanent connection to the mains, to fulfill the latest lighting-fixture ErP requirements.
Manufacturer warranty 3 years, subject to the manufacturer’s applicable terms.

Dimensions, connections and accessories

Parameter Specification
Dimensions and mounting 123.5 × 81.5 × 23 mm; case LCM-60A; two Ø4.2 mm top mounting positions, 110 × 68 mm center spacing. L × W × H; drawing tolerance ±1 mm. Follow the full drawing; the two Ø4 mm side mounting details are separate.
Catalog unit packing reference 240 g per unit, converted from the explicit single-unit PACKING value; not a measured net or parcel weight.
Case temperature measuring point Bottom view: tc 40 mm from the right edge and 15 mm from the adjacent horizontal edge shown in the drawing. Measure this designated point in the final installation.
Terminal assignments TB1: pin 1 AC/L, pin 2 AC/N. TB5: pin 1 +V, pin 2 −V. TB3: pin 1 +FAN, pin 2 −FAN, pin 3 +NTC, pin 4 −NTC, pin 5 DIM+, pin 6 DIM−.
Synchronization connector CN101/CN100: pins 1/3 +, pins 2/4 −; JST B2B-XH or equivalent, mating housing JST XHP or equivalent, terminal JST SXH-001T-P0.6 or equivalent.
Installation and clearance Install indoors by a qualified electrician. Keep at least 50 mm of ventilation clearance around the driver. Follow the dedicated installation manual and the model-specific load and temperature derating limits.
LED load connection Do not connect a DC/DC converter or constant-current driver between this driver and the LED load. The selected output voltage and total output power must remain within the rated limits.
Ambient installation limit The dedicated installation manual limits ambient temperature to 60°C. This is separate from the case-temperature rating; also obey the current model-specific load derating curve.
Wire preparation and tools For the model’s actual small screw terminals: stranded 0.129–0.326 mm² (22–26 AWG), or solid diameter 0.404–0.643 mm; strip 7 mm; use a 3 mm Phillips screwdriver; recommended torque 2.88 kgf·cm. For the AC and LED-output push terminals: stranded 0.823–2.08 mm² (14–18 AWG), or solid diameter 1.024–1.628 mm; strip 10 mm; suggested push-down force 3–4 kp. Apply only to the populated terminals in the exact model drawing.
Terminal cover Blue cover: 6 mm Phillips screwdriver; recommended torque 4.6 kgf·cm. The cover torque is not a push-terminal torque.

Catalog reference: LCM-40, 2026-02-09; combined PDF pages 25–32. Apply the exact model wiring, current, voltage and thermal limits together.

MEAN WELL LCM-40 series: 3-in-1 dimming constant-current LED driver - LCM-40

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MEAN WELL LCM-40 MEAN WELL LCM-40 is a 40 W-class multiple-stage constant-current LED driver with 3-in-1 dimming. 42 W catalog... Read more

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    Description

    MEAN WELL LCM-40

    MEAN WELL LCM-40 is a 40 W-class multiple-stage constant-current LED driver with 3-in-1 dimming. 42 W catalog rating; each setting must also remain within its LED-voltage window. Select the DIP current and matching LED voltage before use. Designed for indoor, office, architectural and panel lighting.

    Output and selection

    Parameter Specification
    Model and operating mode LCM-40; multiple-stage constant-current AC/DC LED driver. Standard model with 3-in-1 dim-to-off control.
    Rated output power 42 W catalog rating; each setting must also remain within its LED-voltage window.
    Output current and voltage DIP-selected output, factory default 700 mA. Match the LED forward voltage to the selected row below; a power rating does not override its voltage limit.
    Current ripple and tolerance Ripple: 5% maximum at rated current; measured at 60–100% of maximum output voltage under rated power delivery. Current tolerance: ±5%.
    Typical efficiency 91%, measured at 500 mA / 80 V output selected by DIP. General test basis: 230 VAC, rated current, 25°C ambient; PF/THD/efficiency plots use Tcase 80°C.
    Startup time 500 ms at 230 VAC, first cold start; repeated ON/OFF may increase startup time.
    Auxiliary DC output Nominal 12 V, deviation 11.4–12.6 V, at 50 mA; +FAN/−FAN terminals can supply an external fan.

    DIP current settings

    Parameter Specification
    350 mA 2–100 VDC; maximum open-circuit voltage 110 V. DIP 1/2/3/4/5/6: OFF / OFF / OFF / OFF / OFF / OFF.
    500 mA 2–80 VDC; maximum open-circuit voltage 110 V. DIP 1/2/3/4/5/6: ON / OFF / OFF / OFF / OFF / OFF.
    600 mA 2–67 VDC; maximum open-circuit voltage 110 V. DIP 1/2/3/4/5/6: ON / ON / OFF / OFF / OFF / OFF.
    700 mA (default) 2–57 VDC; maximum open-circuit voltage 65 V. DIP 1/2/3/4/5/6: ON / ON / ON / OFF / OFF / ON.
    900 mA 2–45 VDC; maximum open-circuit voltage 65 V. DIP 1/2/3/4/5/6: ON / ON / ON / ON / OFF / ON.
    1050 mA 2–40 VDC; maximum open-circuit voltage 65 V. DIP 1/2/3/4/5/6: ON / ON / ON / ON / ON / ON.

    Control and commissioning

    Parameter Specification
    Dimming inputs Use 0–10 VDC, 10 V PWM at 100 Hz–3 kHz, or resistance between DIM+ and DIM−. Dimming source current: 100 μA typical. Connect directly to LEDs, not to additional drivers. Never connect DIM− to −V.
    Dimming range Minimum dimming level about 6%; output is undefined between 0% and 6%. Output can reach 0% with approximately 0 kΩ, 0 VDC, or 0% PWM duty. Resistance full scale is 100 kΩ/N, where N is the number of drivers in synchronized dimming. Do not activate temperature compensation during dimming.
    Synchronization Up to 10 drivers: 1 master + 9 slaves. Dimming operating range 10–100%; minimum also depends on the dimmer setting. Flat synchronization cable <5 m, 22–24 AWG (0.2–0.3 mm²). Set every unit to 100% dimming before connecting. Synchronization is a control connection, not parallel connection of LED power outputs.
    External NTC compensation Connect a temperature-sensing NTC resistor across +NTC / −NTC at the LED or surrounding sensing point. With no NTC, normal operation follows the DIP-selected current. Reference resistances: 220 kΩ holds 100% below 60°C and reduces current above 60°C; 330 kΩ uses 70°C; 470 kΩ uses 80°C. Follow the respective continuous derating curves.
    NTC compatibility and control limits Reference measurements use THINKING TTC03 series; MEAN WELL does not supply the NTC resistor. Check the temperature curve before substituting another make. Dimming and synchronization are invalid while temperature compensation is in use.

    Input and protection

    Parameter Specification
    Input supply 180–295 VAC; 254–417 VDC; 47–63 Hz AC. Active PFC.
    Power factor and THD Typical PF ≥0.975 at 230 VAC; ≥0.96 at 277 VAC, full load. THD <20% at load ≥75%.
    Typical AC current 0.23 A / 230 VAC; 0.2 A / 277 VAC.
    Inrush and breaker reference Cold-start inrush: 20 A typical at 230 VAC; width 260 μs at 50% Ipeak, per NEMA 410. Catalog 16 A circuit-breaker loading at 230 VAC: 26 type B / 44 type C units. Confirm the actual installation and breaker.
    Leakage and standby Leakage <0.5 mA at 240 VAC. Standby <1 W measured at 180–230 VAC.
    Short circuit Constant-current limiting; automatically recovers after the fault is removed.
    Overtemperature Output shuts down; reapply power to recover.
    Overvoltage protection 110–130 V; output shuts down; reapply power to recover.

    Operating limits

    Parameter Specification
    Temperature and cooling Free-air convection. Tcase −30 to +90°C; maximum case temperature +90°C. Horizontal mounting ambient curve: 1050 mA: ambient limit 40°C at full load; the graph ends there for these settings. Other listed settings: full load through 50°C, then derate to 60% at 60°C. Case and ambient temperatures are different limits.
    Input and altitude derating At 60 Hz: 80% load at 180 VAC, rising to 100% at 200 VAC, remaining 100% through 295 VAC. Apply thermal limits concurrently. Above 2000 m, reduce permissible ambient temperature by 3.5°C per additional 1000 m for this fanless driver.
    Humidity, storage and coefficient Operating: 20–90% RH, non-condensing. Storage: −40 to +80°C, 10–95% RH. Temperature coefficient ±0.03%/°C over 0–40°C.
    Vibration and MTBF Vibration 10–500 Hz, 2 G, 10 minutes/cycle, 60 minutes on each X/Y/Z axis. MTBF 2397.0 / 260.6 thousand hours minimum, Telcordia SR-332 / MIL-HDBK-217F at 25°C, respectively.

    Safety and installation conditions

    Parameter Specification
    Construction Plastic housing, Class II, no FG; SELV output.
    Safety approval scope UL8750; CSA C22.2 No.250.13-12; ENEC BS EN/EN61347-1 and -2-13; BS EN/EN62384 independent; GB/T19510.1 and GB/T19510.213; BIS IS15885; EAC TP TC 004, as listed in the catalog.
    Insulation Input–output withstand 3.75 kVAC. Input–output insulation resistance >100 MΩ at 500 VDC, 25°C and 70% RH.
    EMC BS EN/EN55015; BS EN/EN61000-3-2 Class C at load ≥40%; BS EN/EN61000-3-3; GB/T17743; GB17625.1; EAC TP TC 020. Immunity: BS EN/EN61000-4-2, -3, -4, -5, -6, -8, -11 and BS EN/EN61547, light-industry level, line-to-line surge 2 kV. Requalify EMC on the complete final installation.
    ErP installation condition The 2026-02-09 catalog states this driver must be installed behind a switch, without permanent connection to the mains, to fulfill the latest lighting-fixture ErP requirements.
    Manufacturer warranty 3 years, subject to the manufacturer’s applicable terms.

    Dimensions, connections and accessories

    Parameter Specification
    Dimensions and mounting 123.5 × 81.5 × 23 mm; case LCM-60A; two Ø4.2 mm top mounting positions, 110 × 68 mm center spacing. L × W × H; drawing tolerance ±1 mm. Follow the full drawing; the two Ø4 mm side mounting details are separate.
    Catalog unit packing reference 240 g per unit, converted from the explicit single-unit PACKING value; not a measured net or parcel weight.
    Case temperature measuring point Bottom view: tc 40 mm from the right edge and 15 mm from the adjacent horizontal edge shown in the drawing. Measure this designated point in the final installation.
    Terminal assignments TB1: pin 1 AC/L, pin 2 AC/N. TB5: pin 1 +V, pin 2 −V. TB3: pin 1 +FAN, pin 2 −FAN, pin 3 +NTC, pin 4 −NTC, pin 5 DIM+, pin 6 DIM−.
    Synchronization connector CN101/CN100: pins 1/3 +, pins 2/4 −; JST B2B-XH or equivalent, mating housing JST XHP or equivalent, terminal JST SXH-001T-P0.6 or equivalent.
    Installation and clearance Install indoors by a qualified electrician. Keep at least 50 mm of ventilation clearance around the driver. Follow the dedicated installation manual and the model-specific load and temperature derating limits.
    LED load connection Do not connect a DC/DC converter or constant-current driver between this driver and the LED load. The selected output voltage and total output power must remain within the rated limits.
    Ambient installation limit The dedicated installation manual limits ambient temperature to 60°C. This is separate from the case-temperature rating; also obey the current model-specific load derating curve.
    Wire preparation and tools For the model’s actual small screw terminals: stranded 0.129–0.326 mm² (22–26 AWG), or solid diameter 0.404–0.643 mm; strip 7 mm; use a 3 mm Phillips screwdriver; recommended torque 2.88 kgf·cm. For the AC and LED-output push terminals: stranded 0.823–2.08 mm² (14–18 AWG), or solid diameter 1.024–1.628 mm; strip 10 mm; suggested push-down force 3–4 kp. Apply only to the populated terminals in the exact model drawing.
    Terminal cover Blue cover: 6 mm Phillips screwdriver; recommended torque 4.6 kgf·cm. The cover torque is not a push-terminal torque.

    Catalog reference: LCM-40, 2026-02-09; combined PDF pages 25–32. Apply the exact model wiring, current, voltage and thermal limits together.

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