MEAN WELL LCM-25
MEAN WELL LCM-25 is a 25 W-class multiple-stage constant-current LED driver with 3-in-1 dimming. 18.9 W at 350 mA; 25.2 W catalog rating at the other five main settings. Select the DIP current and matching LED voltage before use. Designed for indoor, office, architectural and panel lighting.
Download MEAN WELL LCM-25 Datasheet (PDF)Download MEAN WELL LCM-25 Installation Manual
Output and selection
Parameter
Specification
Model and operating mode
LCM-25; multiple-stage constant-current AC/DC LED driver. Standard model with 3-in-1 dim-to-off control.
Rated output power
18.9 W at 350 mA; 25.2 W catalog rating at the other five main settings.
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. Current tolerance: ±5%.
Typical efficiency
86%, measured at 500 mA / 50 V output selected by DIP. General test basis: 230 VAC, rated current, 25°C ambient; PF/THD/efficiency plots use Tcase 75°C.
Startup time
500 ms at 230 VAC, first cold start; repeated ON/OFF may increase startup time.
DIP current settings
Parameter
Specification
350 mA
6–54 VDC; maximum open-circuit voltage 59 V. DIP 1/2/3/4/5/6: OFF / OFF / OFF / OFF / OFF / OFF.
500 mA
6–50 VDC; maximum open-circuit voltage 59 V. DIP 1/2/3/4/5/6: ON / OFF / OFF / OFF / OFF / OFF.
600 mA
6–42 VDC; maximum open-circuit voltage 59 V. DIP 1/2/3/4/5/6: ON / ON / OFF / OFF / OFF / OFF.
700 mA (default)
6–36 VDC; maximum open-circuit voltage 41 V. DIP 1/2/3/4/5/6: ON / ON / ON / OFF / OFF / ON.
900 mA
6–28 VDC; maximum open-circuit voltage 41 V. DIP 1/2/3/4/5/6: ON / ON / ON / ON / OFF / ON.
1050 mA
6–24 VDC; maximum open-circuit voltage 41 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.
Input and protection
Parameter
Specification
Input supply
180–277 VAC; 254–392 VDC; 47–63 Hz AC. Active PFC.
Power factor and THD
Typical PF ≥0.94 at 230 VAC; ≥0.91 at 277 VAC, full load. THD <20% at load ≥50% / 230 VAC or ≥75% / 277 VAC.
Typical AC current
0.17 A / 230 VAC; 0.15 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 <0.5 W measured at 230 VAC.
Short circuit
Constant-current limiting; automatically recovers after the fault is removed.
Overtemperature
Output shuts down; automatically recovers after temperature falls.
Operating limits
Parameter
Specification
Temperature and cooling
Free-air convection. Tcase −30 to +85°C; maximum case temperature +85°C. Horizontal mounting ambient curve: 350–700 mA: full load through 50°C, then derate to 60% at 60°C; 900 mA: full load through 45°C, then to 60% at 55°C; 1050 mA: full load through 40°C, then to 60% at 50°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 277 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 0–50°C.
Vibration and MTBF
Vibration 10–500 Hz, 2 G, 10 minutes/cycle, 60 minutes on each X/Y/Z axis. MTBF 3298.3 / 298.7 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 ≥50%; 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
105 × 68 × 23 mm; case LCM-25; two Ø4.2 mm top mounting positions, 93 × 62 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
160 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 35 mm from the right edge and 20 mm below the top edge. Measure this designated point in the final installation.
Terminal assignments
TB1: pin 1 AC/L, pin 2 AC/N. TB2: pin 1 +V, pin 2 −V, pin 3 DIM−, pin 4 DIM+.
Catalog wiring sizes
TB1: 0.5–2.5 mm² (14–20 AWG). TB2: 0.5–1.5 mm² (16–20 AWG).
Synchronization connector
CN100/CN101: pin 1 −, pin 2 +; JST B2B-PH-KL or equivalent, mating housing JST PHR-2 or equivalent, terminal JST SPH-002T-P0.5S or equivalent. The mechanical connector table specifies 24–26 AWG (0.126–0.205 mm²), whereas the synchronization section specifies 22–24 AWG (0.2–0.3 mm²) for the cable. Match both the connector and cable requirements; confirm the selected assembly.
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 actual TB2 output/control push terminals: stranded 0.5–1.5 mm² (16–20 AWG), or solid diameter 0.8–1.382 mm; strip 7 mm; use a 3 mm slotted screwdriver; suggested push-down force 1.5–2.4 kp. For the actual TB1 primary-side push terminals: stranded 0.5–2.5 mm² (14–20 AWG), or solid diameter 0.8–1.8 mm; strip 10 mm; use a 3 mm slotted screwdriver; suggested push-down force 3–4 kp. Apply only to the terminals shown for this exact model.
Cable clamp
Use a 6 mm Phillips screwdriver for the clamp connector; recommended tightening torque 4 kgf·cm. Do not apply this torque to spring push terminals.
Breaker-document difference
The current catalog lists 26 type-B16 / 44 type-C16 units at 230 VAC. The installation manual’s older ABB S201 calculation gives 32 B16 / 54 C16 (and 20 B10 / 34 C10). These are different reference tables; use the current catalog limit and verify the selected breaker and installation.
Catalog reference: LCM-25, 2026-02-09; combined PDF pages 1–8. Apply the exact model wiring, current, voltage and thermal limits together.
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