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Mean Well

Mean Well SD-15B-12 DC-DC Converter - 15W - 18~36V in 12V out 1.25A

2:1 wide input range1.5~2KVAC isolation by models
SKU SD-15B-12
$16.28 USD
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In stock
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Overview

SD-15B-12 is the 12V output model of this series: rated current 1.25A, rated power 15W, typical efficiency 76%.

Features

  • 2:1 wide input range
  • Protections:Short circuit/Over load /voltage
  • Built-in EMI filter, low ripple noise
  • 100% full load burn-in test
  • Low cost
  • High reliability
  • 2 years warranty

Specifications

SD-15B-12Specifications from the official datasheet (2024-11-22 edition)

OUTPUT

DC VOLTAGE
12V
RATED CURRENT
1.25A
CURRENT RANGE
0 ~ 1.25A
RATED POWER
15W
RIPPLE & NOISE (max.)Note.2
120mVp-p
VOLTAGE ADJ.RANGE
10.8~13.2VDC
VOLTAGE TOLERANCENote.3
±1.0%
LINE REGULATION
±0.3%
LOAD REGULATION
±0.3%
SETUP, RISE ,HOLD UP TIME
2.5s, 25ms,--- 12VDC/24VDC/48VDC at full load

INPUT

VOLTAGE RANGE
B:18 ~ 36VDC
EFFICIENCY(Typ.)
76%
DC CURRENT(Typ.)
0.9A/24VDC

PROTECTION

OVER LOAD
105 ~160% rated output power Protection type : Hiccup mode, recovers automatically after fault condition is removed
OVER VOLTAGE
13.8~ 16.2V Protection type : Shut off o/p voltage, clamping by zener diode

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

SAFETY STANDARDS
EAC TP TC 004 approved, design refer to AS/NZS 62368.1
WITHSTAND VOLTAGE
I/P-O/P:1.5KVAC I/P-FG:1KVAC 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), 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
3861.2K hrs min. Telcordia SR-332 (Bellcore) ; 644.2K hrs min. MIL-HDBK-217F (25℃)
DIMENSION
78*51*28mm (L*W*H)
PACKING
0.18Kg,60 PCS/11.8Kg
Test conditions and notes5
  1. 1. All parameters NOT specially mentioned are measured at normal 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-15B-12 Mechanical Specification
Mechanical Specification
SD-15B-12 Block Diagram
Block Diagram

Downloads

FAQ

Can I use the SD-15B-12 to supply a small 12V automation load from an 18-36 input source?

Yes, this model is built for a wider 18-36 input range and provides a constant 12V output at up to 1.25A. Its 15W rating suits lower-power 12V automation, embedded, or industrial auxiliary loads within that limit.

Is the SD-15B-12 appropriate for a 24V-class control system that needs a small regulated 12V rail?

It can be appropriate when the available source is within the 18-36 input range and the downstream device needs 12V constant voltage. The output is limited to 15W and 1.25A, so it is intended for smaller 12V devices rather than heavier loads.

Can this converter power a compact 12V HMI accessory, relay interface, or control board?

This converter is better suited to low-power 12V accessories or control boards that stay within 1.25A output current. Its compact 78.0 × 51.0 × 28.0 mm size and 0.18 kg weight also help where panel space is limited.

Is the SD-15B-12 suitable for outdoor environments or only indoor enclosures?

The operating temperature range is -10°C to +60°C, with output derating at higher temperatures per the derating curve. No IP rating is listed in the provided specifications, so the product data does not confirm outdoor, wet-location, or washdown use.

How does the SD-15B-12 differ from the other SD-15B models?

The SD-15B family includes SD-15B-5 at 15W, 5V, 3A; SD-15B-12 at 15W, 12V, 1.25A; and SD-15B-24 at 15W, 24V, 0.625A. All three share the 18-36VDC input range, constant voltage mode, -10°C to +60°C operating temperature (with derating), 78 × 51 × 28 mm dimensions, 0.18 kg weight, and EAC TP TC 004 approval.

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Mean Well SD-15B-12 DC-DC Converter - 15W - 18~36V in 12V out 1.25A
Mean Well

Mean Well SD-15B-12 DC-DC Converter - 15W - 18~36V in 12V out 1.25A

$16.28 USD

SD-15B-12 is the 12V output model of this series: rated current 1.25A, rated power 15W, typical efficiency 76%.

Features

  • 2:1 wide input range
  • Protections:Short circuit/Over load /voltage
  • Built-in EMI filter, low ripple noise
  • 100% full load burn-in test
  • Low cost
  • High reliability
  • 2 years warranty
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