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Mean Well SD-500L-24 DC-DC Converter - 500W - 19~72V 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-500L-24

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Overview

SD-500L-24 is the 24V output model of this series: rated current 21A, rated power 504W, typical efficiency 88%.

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-500L-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 TOLERANCE^Note.3: ±1.0%
LINE REGULATION: ±0.5%
LOAD REGULATION: ±0.5%
SETUP, RISE TIME: 500ms, 50ms at full load

INPUT

VOLTAGE RANGE^Note.5: 19 ~ 72VDC
EFFICIENCY (Typ.): 88%
DC CURRENT (Typ.): 24.2A/19VDC 24.8A/24VDC 12A/48VDC
CURRENT (AT NO LOAD): Max. 0.2A/48VDC
INRUSH CURRENT (Typ.): 60A/48VDC

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. All parameters NOT specially mentioned are measured at 48, 96VDC input, rated load and 25℃ of ambient temperature.
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. Tolerance : includes set up tolerance, line regulation and load regulation.
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. Derating may be needed under low input voltages. Please check the derating curve for more details.
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-500L-24 Mechanical Specification — Mechanical Specification

SD-500L-24 Block Diagram — Block Diagram

SD-500L-24 Derating Curve — Derating Curve

SD-500L-24 S D - 5 0 0 series — S D - 5 0 0 series

SD-500L-24 S D - 5 0 0 series (2) — S D - 5 0 0 series (2)

SD-500L-24 2.Output OK signal — 2.Output OK signal

SD-500L-24 +Vo +Vo -Vo -Vo +V ADJ. CN3 — +Vo +Vo -Vo -Vo +V ADJ. CN3

Downloads

Certificates2

EMC Certificate (SD-500)(EN) PDF Download

CB Certificate (SD-500)(EN) PDF Download

Test reports1

Test Report (SD-500L-24)(EN) PDF Download

Catalogues2

Mean Well DC-DC Catalog PDF Download

Mean Well Catalog (Industrial) PDF Download

FAQ

Can I use the SD-500L-24 for 24V PLC or industrial automation loads?

Yes, this unit provides constant-voltage 24V output for systems that need regulated 24V DC. It supports up to 21A and 504W, with a 19-72V input range for higher-voltage source systems.

Is the SD-500L-24 a fit for 24V embedded controllers or industrial PCs?

It can be used where the equipment requires constant 24V DC and the available source is within the 19-72V input range. Its 504W rating and 21A output capacity make it suitable for higher-power 24V embedded platforms and control hardware.

Can this model support 24V sensors, relays, and control accessories from a vehicle or battery bus?

Yes, provided the connected 24V loads stay within 21A and 504W. The 4:1 wide input range allows it to be used where the source varies across a 19-72V range but the downstream equipment still needs regulated 24V.

Can the SD-500L-24 be used in telecom or network equipment that runs on 24V DC?

It is appropriate for 24V telecom, network, or monitoring equipment that needs constant-voltage output up to 504W. The remote ON/OFF control and remote sense features also align with managed equipment applications.

How does the SD-500L-24 compare with the other SD-500L versions?

The SD-500L-24 is rated for 504W at 24V and 21A. In the same SD-500L family, the SD-500L-12 is 480W at 12V and 40A, while the SD-500L-48 is 504W at 48V and 10.5A. All three list the same 19-72V input range, 215.0 × 115.0 × 50.0 mm size, 1.15 kg weight, and -20°C to +60°C operating temperature.

Can the SD-500L-24 be used where ambient temperatures change a lot?

The specified operating temperature range is -20°C to +60°C. No IP rating is listed in the provided specs, so temperature capability is defined, but outdoor exposure protection is not.

Payment & Security

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Model	Power	Voltage	Current	IP Rating
Mean Well SD-500L-48 DC-DC Converter - 500W - 19~72V in 48V out 10.5A	504W	48V	10.5A	IP20	View
Mean Well SD-500L-12 DC-DC Converter - 480W - 19~72V in 12V out 40A	480W	12V	40A	IP20	View

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Mean Well SD-500L-24 DC-DC Converter - 500W - 19~72V in 24V out 21A

Overview

Features

Specifications

OUTPUT

INPUT

PROTECTION

FUNCTION

ENVIRONMENT

SAFETY & EMC (Note 4)

OTHERS

Technical drawings

Downloads

Certificates2

Test reports1

Catalogues2

FAQ

Payment & Security

Other SD-500L Models

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Mean Well SD-500L-24 DC-DC Converter - 500W - 19~72V in 24V out 21A

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