The MEAN WELL SD-1000H-48 is an isolated DC/DC converter with a 48 V output rated at 21 A and 1008 W. Its H-code input accepts 72–144 VDC, subject to the input-voltage and temperature derating curves. A built-in fan with speed control, remote sensing, remote ON/OFF control and an OUTPUT OK signal support equipment integration. A separate nominal 12 V auxiliary output supplies up to 0.25 A.
Product Datasheet
Download MEAN WELL SD-1000 Datasheet (PDF)
The SD-1000 section is on PDF pages 22, 23, 24, 25. Refer to the complete mechanical drawings and notes when planning installation.
Model and Output Ratings
| Full model |
SD-1000H-48 |
| Series |
SD-1000 |
| Input version |
H: 72–144 VDC |
| DC output voltage |
48 V |
| Rated output current |
21 A |
| Rated output power |
1008 W |
| Output current range |
0–21 A |
| Output voltage adjustment |
46–60 V |
| Maximum ripple and noise |
150 mVp-p |
| Voltage tolerance |
±1.0% |
| Line regulation |
±0.5% |
| Load regulation |
±0.5% |
Use the stated voltage, current and power limits together when setting the output. The series name is not the output-power rating of every voltage version. Remote sensing compensates wiring loss within its own limit; it does not increase the converter rating.
Input and Electrical Performance
| DC input range |
72–144 VDC |
| Typical efficiency |
92% |
| Typical input current |
11.6 A at 96 VDC |
| Typical inrush current |
100 A at 96 VDC |
| Set-up / rise time at full load |
500 / 50 ms |
| Standard measurement conditions |
96 VDC input, rated load and 25°C ambient |
Ripple and noise are measured at 20 MHz bandwidth using a 12-inch twisted pair terminated with parallel 0.1 µF and 47 µF capacitors. Voltage tolerance includes set-up tolerance, line regulation and load regulation.
Select the DC source and wiring for the actual input range and input-current demand. Apply the low-input load restriction as well as the ambient-temperature restriction.
Protection
| Protection functions |
Short circuit, overload, overvoltage and overtemperature |
| Overload threshold |
105–125% of rated output power |
| Overload behavior |
Constant-current limiting; output shutdown after approximately 5 seconds |
| Overload recovery |
Reapply input power to recover |
| Overvoltage threshold |
62–68 V |
| Overvoltage behavior |
Output shutdown; reapply input power to recover |
| Overtemperature behavior |
Output shutdown; automatic recovery after the temperature falls |
Power Connections and Signal Mating Parts
| DC input terminal block, TB1 |
Pin 1: DC INPUT V+; pin 2: DC INPUT V−; pin 3: FG |
| Main DC output |
Separate busbar terminals marked +V and −V |
| Signal connector |
CN51 HRS DF11-10DP-2DS or equivalent |
| Signal-pin assignment |
pin 1: +S; pin 2: −S; pin 3: OUTPUT OK; pin 4: GND; pin 5: AUX; pin 6: AUXG; pin 7: RC1; pin 8: RC2; pin 9: RCG; pin 10: NC |
| Mating housing |
HRS DF11-10DS or equivalent |
| Mating terminal |
JST SPHD-002T-P0.5 or equivalent |
Connect protective earth to FG and observe the markings on the main output busbars. Leave CN51 pin 10 (NC) unconnected.
Choose the mating housing, terminals and wire assembly for CN51 from the listed references. Confirm which mating parts are supplied with the order.
Auxiliary Output
| Auxiliary supply pins |
CN51 pin 5: AUX; pin 6: AUXG |
| Auxiliary voltage range |
10.8–13.2 VDC |
| Maximum auxiliary current |
0.25 A |
| Auxiliary return |
AUXG is isolated from the main +V and −V outputs |
This nominal 12 V supply is separate from the main output. Use AUXG as its return. CN51 pin 4 GND is connected to the main −V output and is not the isolated auxiliary return.
Remote ON/OFF Control
| Remote-control pins |
CN51 pin 7: RC1; pin 8: RC2; pin 9: RCG |
| Figure 1.2(A), external 5 V |
Use the external 5 V source and 620 Ω series resistor shown with RC2 / RCG; switch open: output on; switch closed: output off |
| Figure 1.2(B), internal auxiliary supply |
Link AUX pin 5 to RC1 pin 7 and switch RCG pin 9 to AUXG pin 6; switch open: output on; switch closed: output off |
| Figure 1.2(C), internal auxiliary supply |
Link AUX pin 5 to RC1 pin 7 and switch RC2 pin 8 to RCG pin 9; switch closed: output on; switch open: output off |
Select one complete control circuit from the function drawing. The opposite switch action in Figure 1.2(C) depends on its RC2-to-RCG connection; apply the switch-state table only to the corresponding wiring.
OUTPUT OK Status and Remote Sensing
| OUTPUT OK pins |
CN51 pin 3: OUTPUT OK; pin 4: GND |
| OUTPUT OK interface |
Open-collector signal |
| OUTPUT OK maximum external voltage / sink current |
13 V / 10 mA |
| OUTPUT OK voltage mode |
Output on: 0–0.5 V; output off: 12–13 V |
| Signal GND reference |
Connected to the main −V output |
| Remote-sense pins |
CN51 pin 1: +S; pin 2: −S |
| Maximum remote-sense compensation |
0.5 V line-voltage drop |
Connect +S to the positive load terminal and −S to the negative load terminal using a twisted pair. Keep the sense pair separate from the load-current conductors and observe the 0.5 V compensation limit. The OUTPUT OK connection is a status interface, not a load-power output.
Cooling and Environmental Limits
| Cooling |
Built-in fan with speed control |
| Working temperature |
−20 to +60°C, subject to derating |
| Horizontal-installation thermal curve |
100% load through 50°C; reduce to 60% at 60°C |
| Input-voltage load curve |
100% load from 72 to 144 VDC |
| Working humidity |
20–90% RH, non-condensing |
| Storage temperature / humidity |
−40 to +85°C; 10–95% RH, non-condensing |
| Temperature coefficient |
±0.02%/°C from 0 to 50°C |
| Vibration |
10–500 Hz, 2 G; 10 minutes per cycle, 60 minutes on each X, Y and Z axis |
Keep the fan inlet and exhaust path clear. The published curves are for horizontal installation; apply the input-voltage and temperature limits together.
Above 2000 m, reduce the allowable ambient temperature by 5°C for each additional 1000 m for this fan-cooled model.
Safety and EMC
| Catalogue-listed safety approvals |
IEC 62368-1 CB approved by TUV; TUV BS EN / EN 62368-1; AS/NZS 62368.1; EAC TP TC 004 |
| Withstand voltage |
Input–output: 2 kVAC; input–FG: 2 kVAC; output–FG: 0.5 kVAC |
| Isolation resistance |
Input–output, input–FG and output–FG: 100 MΩ at 500 VDC, 25°C and 70% RH |
| EMC emission |
BS EN / EN 55032 (CISPR 32); EAC TP TC 020 |
| EMC immunity |
BS EN / EN 61000-4-2/-3/-4/-6/-8; light-industry level; EAC TP TC 020 |
The EMC test installation uses a 720 × 360 × 1 mm metal plate. This converter is a component for integration into final equipment; check the completed installation against the applicable EMC requirements.
Mechanical Data and Installation
| Catalogue dimensions, L × W × H |
295 × 127 × 41 mm |
| Case number |
952B |
| Mechanical-drawing tolerance |
±1 mm |
| Mounting-thread callouts |
Use M4, L = 6 mm and M4, L = 4 mm at their respective marked positions in the drawing |
| Mass, catalogue PACKING reference per unit |
1940 g |
| Catalogue packing |
1.94 kg; 6 units / 12.6 kg / 1.15 CUFT |
| Minimum MTBF |
898.2K hours, Telcordia SR-332 (Bellcore); 106.7K hours, MIL-HDBK-217F at 25°C |
| Catalogue warranty |
3 years |
The 41 mm enclosure height supports 1U equipment layouts. The catalogue states a series power density of 10.7 W/in³; use the actual output rating of this model when sizing the installation. SVR51 is the output-voltage adjustment control.
Follow the hole locations and location-specific screw lengths in the mechanical drawing. Allow additional space for the projecting terminals, mating connectors, cable bends and cooling airflow. The catalogue dimensions are not a complete installed cable-clearance envelope.
The per-unit PACKING figure is a catalogue packing reference, not a measured net weight or shipping-package weight.
