MEAN WELL SDR-960 series: Industrial DIN Rail Power Supply with PFC and Current Sharing - SDR-960-24

Description

MEAN WELL SDR-960-24 is a convection-cooled industrial DIN rail power supply rated at 24 V DC, 40 A and 960 W. It includes active PFC, adjustable output, a DC OK relay and current sharing. Its 130% peak capability is limited to 3 seconds; average output power must remain within 960 W and all input-voltage and temperature limits apply.

Product Datasheet

Download MEAN WELL SDR-960 Datasheet (PDF)

The SDR-960 section is on PDF pages 16, 17, 18. Refer to the complete mechanical drawings and notes when planning installation.

Model Identification

Complete model SDR-960-24
SDR-960 family 960 W single-output family with built-in current sharing.
24 output code 24 V nominal DC output.
Construction Active PFC, free-air convection, constant-current limiting, adjustable DC output and DC OK indication/contact. No fan is required by the stated cooling method.

DC Output

Nominal output 24 V DC; 40 A rated, current range 0–40 A; 960 W rated power.
Peak output 52 A / 1248 W (130% of rated power), for no more than 3 seconds; average output power must not exceed 960 W.
Output-voltage adjustment 24–28 V DC using +V ADJ. Stay within rated current and power when adjusting.
Ripple and noise, maximum 180 mVp-p.
Voltage tolerance ±1.0%, including setup tolerance, line regulation and load regulation.
Line / load regulation ±0.5% / ±1.0%.
Efficiency, typical 94% under the stated catalogue reference conditions.

Ripple and noise are measured with 20 MHz bandwidth and a 12-inch twisted pair terminated with 0.1 µF and 47 µF parallel capacitors.

Input and Starting

AC input 180–264 VAC; this is not a 115 VAC input model.
DC input 254–370 VDC.
Frequency 47–63 Hz.
Power factor, typical PF ≥0.95 at 230 VAC, at full load.
AC input current, typical 6 A at 230 VAC.
Cold-start inrush, typical 50 A at 230 VAC.
Setup / rise time 1000 / 100 ms at 230 VAC, at full load.
Hold-up time, typical 14 ms at 230 VAC, at full load.
Leakage current Less than 3.5 mA at 240 VAC.

Protection and DC OK Relay

Short circuit / overload At 105–130% of rated output power, the specification describes operation for more than 3 seconds followed by output shutdown; automatic recovery occurs after 30 seconds if the peak-load condition has been removed. At 130–150%, constant-current limiting operates for more than 3 seconds before shutdown; re-power to recover.
Overvoltage 29–33 V; output shutdown with automatic recovery or re-power to recover.
Overtemperature Output shutdown; automatic recovery after temperature falls.
DC OK closed / open Closed: PSU on / DC OK. Open: PSU off / DC fail.
Relay contact limits Resistive load: 60 VDC / 0.3 A, 30 VDC / 1 A or 30 VAC / 0.5 A. Use these voltage/current combinations; the function table also identifies the 30 V / 1 A resistive reference.

The overload response is protective behavior, not permission to extend the 3-second peak limit. The relay is a contact output; no numeric DC OK trip threshold or logic-output voltage is specified here.

Peak Loading and Derating

Repeated peak loading Limit each peak to 3 seconds and keep the complete-cycle average at or below 960 W. No universal fixed duty-cycle percentage is specified; the permitted duty depends on the intervening load and all derating limits.
Lower-baseline waveform example The second catalogue waveform shows 480 W for 15 seconds and 1248 W for 3 seconds. Apply the separate average-power limit; this example does not authorize a longer peak.
Vertical continuous-load curve 100% from -30°C to 50°C, then reduce along the plotted line to 60% at 70°C.
Vertical peak-load curve The 3-second curve is 130% through 50°C, then declines. Follow the actual plotted high-temperature peak limit; 130% is not available throughout the entire ambient range.
Input-voltage curve, 60 Hz 90% load at 180 VAC, rising to 100% at 200 VAC; 100% continues to 264 VAC.

Do not superimpose indefinitely repeated boosts on a continuous rated-power load: lower-load intervals are needed to meet the stated average-power limit. Apply temperature and input-voltage limits together.

Parallel Current Sharing

Maximum units 4 units; consult the manufacturer for other configurations.
Output-voltage matching The difference between outputs must be less than 0.2 V.
Maximum total load current 40 A × number of units × 0.9. With 4 units this gives 144 A before any other required derating; the unadjusted sum of nameplate powers is not the continuous load allowance.
Minimum parallel load Greater than 5% × rated current per unit × number of units.
Sharing connections Connect all P+ terminals together and all P- terminals together. On CN205, pin 1 is P- and pin 2 is P+. Twist the P+/P- lines as a pair. Connect the outputs with short, large-diameter wiring before routing to the load.

Below 5% of total rated load, only the master may operate; slave supplies may enter standby and their output LEDs and relays may remain off. Minor noise at light load during parallel operation is described as normal and not affecting performance.

Environment and Installation Clearances

Cooling / operating temperature Free-air convection; -30 to +70°C, subject to the vertical derating curves.
Humidity / storage Working: 20–95% RH, non-condensing. Storage: -40 to +85°C, 10–95% RH, non-condensing.
Temperature coefficient ±0.03%/°C over 0–50°C.
Vibration Component: 10–500 Hz, 2 G, 10 minutes per cycle and 60 minutes along each X, Y and Z axis. Mounting complies with IEC60068-2-6.
Installation clearances For permanent full-power loading, the catalogue recommends 40 mm above, 20 mm below and 5 mm on each side. Allow 15 mm next to a device that is a heat source.
Altitude derating note For this fanless supply, reduce allowable ambient temperature by 3.5°C per additional 1000 m above 2000 m (6500 ft). No maximum operating altitude is specified by this note.

Dimensions, Terminals and Accessories

Dimensions / case 110 × 125.2 × 150 mm (W × H × D); case 214A, mechanical drawing tolerance ±1 mm.
DIN rail TS-35/7.5 or TS-35/15; the drawing shows a 35 mm rail profile.
AC input TB1 Pin 1: FG protective earth; pin 2: AC/N; pin 3: AC/L.
DC output TB2 Pins 1–3: +V; pins 4–6: -V.
Adjustment / indication The mechanical drawing identifies +V ADJ and the DC OK indicator. Follow the complete drawing and the unit markings for wiring and installation.
Control connector CN205 Pin 1: P-; pin 2: P+; pins 3–4: DC OK relay contact.
CN205 connector / mating housing Board connector: DINKLE ECH250R-04P or equivalent. Mating housing: DINKLE ESC250V-04P or equivalent, included in the single package.
CN205 wire range 0.081–0.517 mm² (28–20 AWG).

The listed mating housing is an included item; the DIN rail and other wiring accessories are not stated to be included. Use the named compatible connector or a verified equivalent.

Safety, Insulation and EMC

Catalogue-listed safety UL508; TUV BS EN/EN62368-1; AS/NZS62368.1; EAC TP TC004; BSMI CNS15598-1. The table also states compliance with BS EN/EN60204-1.
Withstand voltage Input–output: 3 kVAC; input–FG: 2 kVAC; output–FG: 0.5 kVAC; output–DC OK: 0.5 kVAC.
Insulation resistance More than 100 MΩ for input–output, input–FG and output–FG at 500 VDC, 25°C and 70% RH.
Emissions BS EN/EN55032 (CISPR32) and BS EN/EN61204-3: conducted Class B, radiated Class A; BS EN/EN61000-3-2 and -3; EAC TP TC020; CNS15936; KC KSC9832. Consult MEAN WELL for radiated Class B deployment.
Immunity BS EN/EN61000-4-2, -3, -4, -5, -6, -8 and -11; BS EN/EN55024; BS EN/EN61000-6-2 (BS EN/EN50082-2); BS EN/EN61204-3, heavy-industry level; EAC TP TC020. KC KSC9835 is also listed.

This supply is a component for installation in final equipment. Reconfirm compliance of the completed equipment with the applicable EMC directives.

Weight, Reliability and Reference Conditions

Catalogue unit weight 2470 g, converted from the explicit 2.47 kg PACKING reference per unit; not a measured net weight, shipping weight or a carton-weight average.
MTBF 660.2 K hours minimum, Telcordia SR-332 (Bellcore); 70.7 K hours minimum, MIL-HDBK-217F at 25°C. These are reliability references, not guaranteed service life.
Manufacturer statements 100% full-load burn-in test and a three-year warranty are listed in the catalogue; applicable manufacturer terms govern warranty coverage.
Default test conditions Unless otherwise specified: 230 VAC input, rated load and 25°C ambient.
Datasheet revision SDR-960-SPEC, 2025-02-17; combined SDR catalogue pages 16–18.

MEAN WELL SDR-960 series: Industrial DIN Rail Power Supply with PFC and Current Sharing - SDR-960-24

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MEAN WELL SDR-960-24 is a convection-cooled industrial DIN rail power supply rated at 24 V DC, 40 A and 960... Read more

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    Description

    MEAN WELL SDR-960-24 is a convection-cooled industrial DIN rail power supply rated at 24 V DC, 40 A and 960 W. It includes active PFC, adjustable output, a DC OK relay and current sharing. Its 130% peak capability is limited to 3 seconds; average output power must remain within 960 W and all input-voltage and temperature limits apply.

    Product Datasheet

    Download MEAN WELL SDR-960 Datasheet (PDF)

    The SDR-960 section is on PDF pages 16, 17, 18. Refer to the complete mechanical drawings and notes when planning installation.

    Model Identification

    Complete model SDR-960-24
    SDR-960 family 960 W single-output family with built-in current sharing.
    24 output code 24 V nominal DC output.
    Construction Active PFC, free-air convection, constant-current limiting, adjustable DC output and DC OK indication/contact. No fan is required by the stated cooling method.

    DC Output

    Nominal output 24 V DC; 40 A rated, current range 0–40 A; 960 W rated power.
    Peak output 52 A / 1248 W (130% of rated power), for no more than 3 seconds; average output power must not exceed 960 W.
    Output-voltage adjustment 24–28 V DC using +V ADJ. Stay within rated current and power when adjusting.
    Ripple and noise, maximum 180 mVp-p.
    Voltage tolerance ±1.0%, including setup tolerance, line regulation and load regulation.
    Line / load regulation ±0.5% / ±1.0%.
    Efficiency, typical 94% under the stated catalogue reference conditions.

    Ripple and noise are measured with 20 MHz bandwidth and a 12-inch twisted pair terminated with 0.1 µF and 47 µF parallel capacitors.

    Input and Starting

    AC input 180–264 VAC; this is not a 115 VAC input model.
    DC input 254–370 VDC.
    Frequency 47–63 Hz.
    Power factor, typical PF ≥0.95 at 230 VAC, at full load.
    AC input current, typical 6 A at 230 VAC.
    Cold-start inrush, typical 50 A at 230 VAC.
    Setup / rise time 1000 / 100 ms at 230 VAC, at full load.
    Hold-up time, typical 14 ms at 230 VAC, at full load.
    Leakage current Less than 3.5 mA at 240 VAC.

    Protection and DC OK Relay

    Short circuit / overload At 105–130% of rated output power, the specification describes operation for more than 3 seconds followed by output shutdown; automatic recovery occurs after 30 seconds if the peak-load condition has been removed. At 130–150%, constant-current limiting operates for more than 3 seconds before shutdown; re-power to recover.
    Overvoltage 29–33 V; output shutdown with automatic recovery or re-power to recover.
    Overtemperature Output shutdown; automatic recovery after temperature falls.
    DC OK closed / open Closed: PSU on / DC OK. Open: PSU off / DC fail.
    Relay contact limits Resistive load: 60 VDC / 0.3 A, 30 VDC / 1 A or 30 VAC / 0.5 A. Use these voltage/current combinations; the function table also identifies the 30 V / 1 A resistive reference.

    The overload response is protective behavior, not permission to extend the 3-second peak limit. The relay is a contact output; no numeric DC OK trip threshold or logic-output voltage is specified here.

    Peak Loading and Derating

    Repeated peak loading Limit each peak to 3 seconds and keep the complete-cycle average at or below 960 W. No universal fixed duty-cycle percentage is specified; the permitted duty depends on the intervening load and all derating limits.
    Lower-baseline waveform example The second catalogue waveform shows 480 W for 15 seconds and 1248 W for 3 seconds. Apply the separate average-power limit; this example does not authorize a longer peak.
    Vertical continuous-load curve 100% from -30°C to 50°C, then reduce along the plotted line to 60% at 70°C.
    Vertical peak-load curve The 3-second curve is 130% through 50°C, then declines. Follow the actual plotted high-temperature peak limit; 130% is not available throughout the entire ambient range.
    Input-voltage curve, 60 Hz 90% load at 180 VAC, rising to 100% at 200 VAC; 100% continues to 264 VAC.

    Do not superimpose indefinitely repeated boosts on a continuous rated-power load: lower-load intervals are needed to meet the stated average-power limit. Apply temperature and input-voltage limits together.

    Parallel Current Sharing

    Maximum units 4 units; consult the manufacturer for other configurations.
    Output-voltage matching The difference between outputs must be less than 0.2 V.
    Maximum total load current 40 A × number of units × 0.9. With 4 units this gives 144 A before any other required derating; the unadjusted sum of nameplate powers is not the continuous load allowance.
    Minimum parallel load Greater than 5% × rated current per unit × number of units.
    Sharing connections Connect all P+ terminals together and all P- terminals together. On CN205, pin 1 is P- and pin 2 is P+. Twist the P+/P- lines as a pair. Connect the outputs with short, large-diameter wiring before routing to the load.

    Below 5% of total rated load, only the master may operate; slave supplies may enter standby and their output LEDs and relays may remain off. Minor noise at light load during parallel operation is described as normal and not affecting performance.

    Environment and Installation Clearances

    Cooling / operating temperature Free-air convection; -30 to +70°C, subject to the vertical derating curves.
    Humidity / storage Working: 20–95% RH, non-condensing. Storage: -40 to +85°C, 10–95% RH, non-condensing.
    Temperature coefficient ±0.03%/°C over 0–50°C.
    Vibration Component: 10–500 Hz, 2 G, 10 minutes per cycle and 60 minutes along each X, Y and Z axis. Mounting complies with IEC60068-2-6.
    Installation clearances For permanent full-power loading, the catalogue recommends 40 mm above, 20 mm below and 5 mm on each side. Allow 15 mm next to a device that is a heat source.
    Altitude derating note For this fanless supply, reduce allowable ambient temperature by 3.5°C per additional 1000 m above 2000 m (6500 ft). No maximum operating altitude is specified by this note.

    Dimensions, Terminals and Accessories

    Dimensions / case 110 × 125.2 × 150 mm (W × H × D); case 214A, mechanical drawing tolerance ±1 mm.
    DIN rail TS-35/7.5 or TS-35/15; the drawing shows a 35 mm rail profile.
    AC input TB1 Pin 1: FG protective earth; pin 2: AC/N; pin 3: AC/L.
    DC output TB2 Pins 1–3: +V; pins 4–6: -V.
    Adjustment / indication The mechanical drawing identifies +V ADJ and the DC OK indicator. Follow the complete drawing and the unit markings for wiring and installation.
    Control connector CN205 Pin 1: P-; pin 2: P+; pins 3–4: DC OK relay contact.
    CN205 connector / mating housing Board connector: DINKLE ECH250R-04P or equivalent. Mating housing: DINKLE ESC250V-04P or equivalent, included in the single package.
    CN205 wire range 0.081–0.517 mm² (28–20 AWG).

    The listed mating housing is an included item; the DIN rail and other wiring accessories are not stated to be included. Use the named compatible connector or a verified equivalent.

    Safety, Insulation and EMC

    Catalogue-listed safety UL508; TUV BS EN/EN62368-1; AS/NZS62368.1; EAC TP TC004; BSMI CNS15598-1. The table also states compliance with BS EN/EN60204-1.
    Withstand voltage Input–output: 3 kVAC; input–FG: 2 kVAC; output–FG: 0.5 kVAC; output–DC OK: 0.5 kVAC.
    Insulation resistance More than 100 MΩ for input–output, input–FG and output–FG at 500 VDC, 25°C and 70% RH.
    Emissions BS EN/EN55032 (CISPR32) and BS EN/EN61204-3: conducted Class B, radiated Class A; BS EN/EN61000-3-2 and -3; EAC TP TC020; CNS15936; KC KSC9832. Consult MEAN WELL for radiated Class B deployment.
    Immunity BS EN/EN61000-4-2, -3, -4, -5, -6, -8 and -11; BS EN/EN55024; BS EN/EN61000-6-2 (BS EN/EN50082-2); BS EN/EN61204-3, heavy-industry level; EAC TP TC020. KC KSC9835 is also listed.

    This supply is a component for installation in final equipment. Reconfirm compliance of the completed equipment with the applicable EMC directives.

    Weight, Reliability and Reference Conditions

    Catalogue unit weight 2470 g, converted from the explicit 2.47 kg PACKING reference per unit; not a measured net weight, shipping weight or a carton-weight average.
    MTBF 660.2 K hours minimum, Telcordia SR-332 (Bellcore); 70.7 K hours minimum, MIL-HDBK-217F at 25°C. These are reliability references, not guaranteed service life.
    Manufacturer statements 100% full-load burn-in test and a three-year warranty are listed in the catalogue; applicable manufacturer terms govern warranty coverage.
    Default test conditions Unless otherwise specified: 230 VAC input, rated load and 25°C ambient.
    Datasheet revision SDR-960-SPEC, 2025-02-17; combined SDR catalogue pages 16–18.

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