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Mean Well

Mean Well SD-350C-12 DC-DC Converter - 330W - 36~72V in 12V out 27.5A

2:1 wide input range1.5~2KVAC isolation by models
SKU SD-350C-12
$104.96 USD
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Overview

SD-350C-12 is the 12V output model of this series: rated current 27.5A, rated power 330W, typical efficiency 81%.

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

OUTPUT

DC VOLTAGE
12V
RATED CURRENT
27.5A
CURRENT RANGE
0 ~ 27.5A
RATED POWER
330W
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
36 ~ 72VDC
EFFICIENCY (Typ.)
81%
DC CURRENT (Typ.)
8.8A/48V
INRUSH CURRENT (Typ.)
45A/48VDC

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
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/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
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-350C-12 Mechanical Specification
Mechanical Specification
SD-350C-12 Block Diagram
Block Diagram
SD-350C-12 Derating Curve
Derating Curve

Downloads

FAQ

Can I use the SD-350C-12 to step a 36-72V DC bus down to 12V for industrial equipment?

Yes, this model is built for a 36-72V input range and provides a constant 12V output. Its 330W rating and 27.5A output suit 12V industrial or automation loads that need a regulated supply from a higher-voltage DC bus.

Is the SD-350C-12 suitable for 48V-class battery or telecom systems that need 12V output?

It can be a strong fit because its input range is 36V to 72V and the output is regulated at 12V. With up to 27.5A available, it supports substantial 12V embedded, control, or communications loads from higher-voltage DC systems.

Can this converter power 12V automation accessories from a higher-voltage DC source?

Yes, that is the kind of voltage conversion this model is intended for. The constant-voltage 12V output, 330W capacity, and 2:1 wide input range make it appropriate for 12V loads fed from a 36-72V source.

Is the SD-350C-12 suitable for indoor or outdoor environments?

The provided specs state an operating temperature range of -20°C to +60°C. No IP rating is listed, so the data does not confirm outdoor exposure resistance or sealed-enclosure performance.

How does the SD-350C-12 compare with the other SD-350C output versions?

Within the SD-350C group, the 5V model is 300W at 5V and 60A, this 12V model is 330W at 12V and 27.5A, the 24V model is 350.4W at 24V and 14.6A, and the 48V model is 350.4W at 48V and 7.3A. They share the same series family, but the output voltage and output current differ by version.

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Mean Well SD-350C-12 DC-DC Converter - 330W - 36~72V in 12V out 27.5A
Mean Well

Mean Well SD-350C-12 DC-DC Converter - 330W - 36~72V in 12V out 27.5A

$104.96 USD

SD-350C-12 is the 12V output model of this series: rated current 27.5A, rated power 330W, typical efficiency 81%.

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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