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Mean Well

Mean Well SD-25B-5 DC-DC Converter - 25W - 19~36V in 5V out 5A

2:1 wide input range1.5~2KVAC isolation by models
SKU SD-25B-5
$27.69 USD
Shipping calculated at checkout.
In stock
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Overview

SD-25B-5 is the 5V output model of this series: rated current 5A, rated power 25W, typical efficiency 72%.

Features

  • 2:1 wide input range
  • Protections: Short circuit / Overload / Over voltage
  • 1500VAC I/O isolation
  • Built-in EMI filter, low ripple noise
  • 100% full load burn-in test
  • Fixed switching frequency at 83KHz
  • Low cost
  • High reliability
  • 2 years warranty

Specifications

SD-25B-5Specifications from the official datasheet (2025-04-27 edition)

OUTPUT

DC VOLTAGE
5V
RATED CURRENT
5A
CURRENT RANGE
0 ~ 5A
RATED POWER
25W
RIPPLE & NOISE (max.)Note.2
100mVp-p
VOLTAGE ADJ. RANGE
4.5 ~ 5.5VDC
VOLTAGE TOLERANCENote.3
±2.0%
LINE REGULATION
±0.5%
LOAD REGULATION
±0.5%
SETUP, RISE, HOLD UP TIME
2.5s, 50ms, ------ at full load

INPUT

VOLTAGE RANGE
B:19 ~ 36VDC
EFFICIENCY (Typ.)
72%
DC CURRENT
1.6A/24V

PROTECTION

OVERLOAD
105 ~ 150% rated output power Protection type : Hiccup mode, recovers automatically after fault condition is removed
OVER VOLTAGE
5.75 ~ 6.75V/10% load Protection type : Hiccup mode, recovers automatically after fault condition is removed

ENVIRONMENT

WORKING TEMP.
-10 ~ +60℃ (Refer to "Derating Curve")
WORKING HUMIDITY
20 ~ 90% RH non-condensing
STORAGE TEMP., HUMIDITY
-20 ~ +85℃, 10 ~ 95% RH
TEMP. COEFFICIENT
±0.03%/℃ (0 ~ 50℃)
VIBRATION
10 ~ 500Hz, 2G 10min./1cycle, 60min. each along X, Y, Z axes

SAFETY & EMC (Note 4)

SAFETY STANDARDS
EAC TP TC 004 approved, Design refer to LVD, AS/NZS 62368.1
WITHSTAND VOLTAGE
I/P-O/P:1.5KVAC 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,heavy industry level, EAC TP TC 020

OTHERS

MTBF
3682.6K hrs min. Telcordia SR-332 (Bellcore) ; 528.8K hrs min. MIL-HDBK-217F (25℃)
DIMENSION
99*97*36mm (L*W*H)
PACKING
0.38Kg; 45pcs/17.8Kg/0.94CUFT
Test conditions and notes5
  1. 1. All parameters NOT specially mentioned are measured at 12,24,48VDC 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. 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-25B-5 Mechanical Specification
Mechanical Specification
SD-25B-5 Block Diagram
Block Diagram
SD-25B-5 Derating Curve
Derating Curve

Downloads

FAQ

Can I use the SD-25B-5 for a 5V embedded controller or single-board computer in industrial equipment?

Yes, it provides 5V constant voltage output up to 5A with 25W total power available. That makes it suitable for low-voltage embedded electronics that need a regulated 5V rail from a 19-36V input source.

Is the SD-25B-5 a fit for powering 5V logic, I/O boards, or communication modules?

It can support 5V control electronics as long as the total load stays within 5A and 25W. This makes it a practical choice for compact logic boards, interface modules, and similar low-power electronics rather than larger 5V systems.

Can this model be used in a 24V-class control cabinet when the load needs 5V?

It is designed for installations where the available input stays within 19-36V and the output requirement is 5V constant voltage. With up to 5A output current, it fits modest 5V embedded and automation electronics within a 25W budget.

What are the differences between the SD-25B-5 and the other SD-25B versions?

The SD-25B series includes SD-25B-5 at 25W, 5V, 5A; SD-25B-12 at 25.2W, 12V, 2.1A; and SD-25B-24 at 26.4W, 24V, 1.1A. All three share the same 19-36V input range in this series grouping.

Can the SD-25B-5 be used outdoors or in unprotected environments?

The provided specs do not show an IP rating, so there is no stated basis for outdoor exposure or direct moisture exposure. Its operating temperature range is -10°C to +60°C, with output derating at higher temperatures per the derating curve, so it is better suited to protected indoor equipment spaces that stay within that range.

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Mean Well SD-25B-5 DC-DC Converter - 25W - 19~36V in 5V out 5A
Mean Well

Mean Well SD-25B-5 DC-DC Converter - 25W - 19~36V in 5V out 5A

$27.69 USD

SD-25B-5 is the 5V output model of this series: rated current 5A, rated power 25W, typical efficiency 72%.

Features

  • 2:1 wide input range
  • Protections: Short circuit / Overload / Over voltage
  • 1500VAC I/O isolation
  • Built-in EMI filter, low ripple noise
  • 100% full load burn-in test
  • Fixed switching frequency at 83KHz
  • Low cost
  • High reliability
  • 2 years warranty
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