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Mean Well

Mean Well SD-500H-24 DC-DC Converter - 500W - 72~144V in 24V out 21A

4:1 wide input range1.5~2KVAC isolation by models12V/0.25A auxiliary outputbuilt-in remote ON/OFF control and remote sense
SKU SD-500H-24
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Overview

SD-500H-24 is the 24V output model of this series: rated current 21A, rated power 504W, typical efficiency 89%.

Features

  • DC input active surge current limiting
  • Wide 4:1~2:1 DC input range (24V: 19~72VDC, 96V:72~144VDC)
  • Protections: Short circuit / Overload / Over voltage / Over temperature / Input polarity(by fuse)
  • 2000VAC I/O Isolation
  • Forced air cooling by built-in DC fan with fan speed control function
  • Output OK Signal
  • Built-in remote ON-OFF control
  • Built-in remote sense function
  • 3 years warranty

Specifications

SD-500H-24Specifications from the official datasheet (2024-11-22 edition)

OUTPUT

DC VOLTAGE
24V
RATED CURRENT
21A
CURRENT RANGE
0 ~ 21A
RATED POWER
504W
RIPPLE & NOISE (max.)Note.2
150mVp-p
VOLTAGE ADJ. RANGE
23 ~ 30V
VOLTAGE TOLERANCENote.3
±1.0%
LINE REGULATION
±0.5%
LOAD REGULATION
±0.5%
SETUP, RISE TIME
500ms, 50ms at full load

INPUT

VOLTAGE RANGENote.5
72 ~ 144VDC
EFFICIENCY (Typ.)
89%
DC CURRENT (Typ.)
8A/72VDC 6A/96VDC
CURRENT (AT NO LOAD)
Max. 0.1A/96VDC
INRUSH CURRENT (Typ.)
60A/96VDC

PROTECTION

OVERLOAD
105 ~ 125% rated output power Protection type : Constant current limiting, shut down o/p voltage after about 5 sec., re-power on to recover
OVER VOLTAGE
30.8 ~ 35.2V Protection type : Shut down o/p voltage, re-power on to recover
OVER TEMPERATURE
Shut down o/p voltage, recovers automatically after temperature goes down

FUNCTION

REMOTE ON/OFF CONTROL
Please refer to function manual
OUTPUT OK SIGNAL
Open collector signal low when PSU turns on, max. sink current :10mA

ENVIRONMENT

WORKING TEMP.
-20 ~ +60℃ (Refer to "Derating Curve")
WORKING HUMIDITY
20 ~ 90% RH non-condensing
STORAGE TEMP., HUMIDITY
-40 ~ +85℃, 10 ~ 95% RH
TEMP. COEFFICIENT
±0.02%/℃ (0 ~ 50℃)
VIBRATION
10 ~ 500Hz, 2G 10min./1cycle, 60min. each along X, Y, Z axes

SAFETY & EMC (Note 4)

SAFETY STANDARDS
IEC62368-1,TUV BS EN/EN62368-1, EAC TP TC 004 approved, design refer to AS/NZS 62368.1
WITHSTAND VOLTAGE
I/P-O/P:2KVAC I/P-FG:2KVAC O/P-FG:0.5KVAC
ISOLATION RESISTANCE
I/P-O/P, I/P-FG, O/P-FG:100M Ohms / 500VDC / 25℃/ 70% RH
EMC EMISSION
Compliance to BS EN/EN55032 (CISPR32) Class B, EAC TP TC 020
EMC IMMUNITY
Compliance to BS EN/EN61000-4-2,3,4,6,8, BS EN/EN55035, light industry level, EAC TP TC 020

OTHERS

MTBF
1333.7K hrs min. Telcordia SR-332 (Bellcore) ; 196.3K hrs min. MIL-HDBK-217F (25℃)
DIMENSION
215*115*50mm (L*W*H)
PACKING
1.15Kg; 12pcs/14.8Kg/0.9CUFT
Test conditions and notes6
  1. 1. All parameters NOT specially mentioned are measured at 48, 96VDC input, rated load and 25℃ of ambient temperature.
  2. 2. Ripple & noise are measured at 20MHz of bandwidth by using a 12" twisted pair-wire terminated with a 0.1μF & 47μF parallel capacitor.
  3. 3. Tolerance : includes set up tolerance, line regulation and load regulation.
  4. 4. The power supply is considered a component which will be installed into a final equipment. All the EMC tests are been executed by mounting the unit on a 360mm*360mm metal plate with 1mm of thickness. The final equipment must be re-confirmed that it still meets EMC directives. For guidance on how to perform these EMC tests, please refer to “EMI testing of component power supplies.” (as available on https://www.meanwell.com//Upload/PDF/EMI_statement_en.pdf )
  5. 5. Derating may be needed under low input voltages. Please check the derating curve for more details.
  6. 7. The ambient temperature derating of 3.5℃/1000m with fanless models and of 5℃/1000m with fan models for operating altitude higher than 2000m(6500ft).

Technical drawings

SD-500H-24 Mechanical Specification
Mechanical Specification
SD-500H-24 Block Diagram
Block Diagram
SD-500H-24 Derating Curve
Derating Curve
SD-500H-24 S D - 5 0 0 series
S D - 5 0 0 series
SD-500H-24 S D - 5 0 0 series (2)
S D - 5 0 0 series (2)
SD-500H-24 2.Output OK signal
2.Output OK signal
SD-500H-24 S D - 5 0 0 series
S D - 5 0 0 series
SD-500H-24 +Vo +Vo -Vo -Vo +V ADJ. CN3
+Vo +Vo -Vo -Vo +V ADJ. CN3

Downloads

FAQ

Can I use the SD-500H-24 for 24V PLC, control panel, or automation equipment on a 72-144V DC bus?

Yes, it provides a constant 24V output rated at 21A and 504W. That suits 24V industrial control or automation equipment as long as the connected load remains within the 21A output rating.

Is the SD-500H-24 suitable for 24V embedded or communications equipment in a higher-voltage DC system?

It can be used when the equipment requires regulated 24V DC and the load does not exceed 504W. The converter accepts a 72-144V input and uses a 2:1 wide input range, which fits broader-input DC systems.

Can this model support 24V automation applications that need auxiliary power and remote control features?

The sheet does not list an auxiliary output, but it does include built-in remote ON/OFF control, remote sense and an Output OK signal. Those features can help in 24V automation systems where the main load is powered from the 504W, 21A output.

Is the SD-500H-24 appropriate for exposed outdoor use?

The provided specs give an operating temperature range of -20°C to +60°C, but they do not provide an IP rating. That means temperature capability is stated, while exposed outdoor suitability is not confirmed by the listed data.

What are the differences between the SD-500H-24 and the other SD-500H models?

The SD-500H-12 is rated at 480W with 12V output and 40A, the SD-500H-24 is 504W at 24V and 21A, and the SD-500H-48 is 504W at 48V and 10.5A. The series shares the same physical size and feature set, but each version is matched to a different output voltage and current level.

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Mean Well SD-500H-24 DC-DC Converter - 500W - 72~144V in 24V out 21A
Mean Well

Mean Well SD-500H-24 DC-DC Converter - 500W - 72~144V in 24V out 21A

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SD-500H-24 is the 24V output model of this series: rated current 21A, rated power 504W, typical efficiency 89%.

Features

  • DC input active surge current limiting
  • Wide 4:1~2:1 DC input range (24V: 19~72VDC, 96V:72~144VDC)
  • Protections: Short circuit / Overload / Over voltage / Over temperature / Input polarity(by fuse)
  • 2000VAC I/O Isolation
  • Forced air cooling by built-in DC fan with fan speed control function
  • Output OK Signal
  • Built-in remote ON-OFF control
  • Built-in remote sense function
  • 3 years warranty
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