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Mean Well

Mean Well SD-350D-12 DC-DC Converter - 330W - 72~144V in 12V out 29.2A

2:1 wide input range1.5~2KVAC isolation by models
SKU SD-350D-12
$110.13 USD
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In stock
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Overview

SD-350D-12 is the 12V output model of this series: rated current 29.2A, rated power 350.4W, typical efficiency 83%.

Features

  • 2:1 wide input range
  • Protections: Short circuit / Overload / Over voltage / Over temperature
  • 1500VAC I/O isolation
  • Forced air cooling by built-in DC Fan
  • 100% full load burn-in test
  • 24V and 48V input voltage design refer to LVD
  • 2 years warranty

Specifications

SD-350D-12Specifications from the official datasheet (2024-11-22 edition)

OUTPUT

DC VOLTAGE
12V
RATED CURRENT
29.2A
CURRENT RANGE
0 ~ 29.2A
RATED POWER
350.4W
RIPPLE & NOISE (max.)Note.2
120mVp-p
VOLTAGE ADJ. RANGE
11 ~ 16VDC
VOLTAGE TOLERANCENote.3
±1.0%
LINE REGULATION
±0.3%
LOAD REGULATION
±1.0%
SETUP, RISE TIME
300ms, 50ms at full load

INPUT

VOLTAGE RANGE
72 ~144VDC
EFFICIENCY (Typ.)
83%
DC CURRENT (Typ.)
6A/96V
INRUSH CURRENT (Typ.)
45A/96VDC

PROTECTION

OVERLOAD
105 ~ 135% rated output power Protection type : Shut down o/p voltage, re-power on to recover
OVER VOLTAGE
16.8 ~ 20V 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

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
±0.03%/℃ (0 ~ 50℃)
VIBRATION
10 ~ 500Hz, 2G 10min./1cycle, 60min. each along X, Y, Z axes

SAFETY & EMC (Note 4)

SAFETY STANDARDS
IEC/BS EN/EN 62368-1, EAC TP TC 004 approved, design refer to 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/EN55022 (CISPR22) 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
1705.6K hrs min. Telcordia SR-332 (Bellcore) ; 263.9K hrs min. MIL-HDBK-217F (25℃)
DIMENSION
215*115*50mm (L*W*H)
PACKING
1.1Kg; 12pcs/14.4Kg/0.9CUFT
Test conditions and notes5
  1. 1. All parameters NOT specially mentioned are measured at 24,48,96VDC 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. 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-350D-12 Mechanical Specification
Mechanical Specification
SD-350D-12 Block Diagram
Block Diagram
SD-350D-12 Derating Curve
Derating Curve

Downloads

FAQ

Can I use the SD-350D-12 to step down a 72-144V source for 12V industrial controls?

Yes, this converter is built for a 72-144V input range and provides a constant 12V output. Its output rating is 29.2A and 350.4W, so it fits 12V control loads within those limits.

Is the SD-350D-12 suitable for 12V relays, fans, and auxiliary electronics in higher-voltage equipment?

It is a practical fit for 12V auxiliary loads when the source is within 72-144V and the load requires regulated 12V power. Total output must remain at or below 29.2A and 350.4W.

Can this model power several 12V embedded subsystems from one higher-voltage DC bus?

Yes, it can supply multiple 12V subsystems from a 72-144V input as long as the combined draw does not exceed 29.2A. The converter operates in constant-voltage mode, so it is intended for 12V equipment that expects a fixed-voltage supply.

Is the SD-350D-12 rated for harsh indoor environments or outdoor exposure?

The published operating temperature range is -20°C to +60°C, so that is the stated thermal envelope. No IP rating is listed, which means environmental sealing is not defined in these specs and exposed outdoor use is not confirmed.

How does the SD-350D-12 differ from the other SD-350D versions?

The listed SD-350D models are SD-350D-12 at 350.4W, 12V, 29.2A; SD-350D-24 at 350.4W, 24V, 14.6A; SD-350D-48 at 350.4W, 48V, 7.3A; and SD-350D-5 at 300W, 5V, 60A. This version is the 12V model and has the highest output current among the 12V, 24V, and 48V variants shown.

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Mean Well SD-350D-12 DC-DC Converter - 330W - 72~144V in 12V out 29.2A
Mean Well

Mean Well SD-350D-12 DC-DC Converter - 330W - 72~144V in 12V out 29.2A

$110.13 USD

SD-350D-12 is the 12V output model of this series: rated current 29.2A, rated power 350.4W, typical efficiency 83%.

Features

  • 2:1 wide input range
  • Protections: Short circuit / Overload / Over voltage / Over temperature
  • 1500VAC I/O isolation
  • Forced air cooling by built-in DC Fan
  • 100% full load burn-in test
  • 24V and 48V input voltage design refer to LVD
  • 2 years warranty
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