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Mean Well

Mean Well SD-350B-48 DC-DC Converter - 350W - 19~36V in 48V out 7.3A

2:1 wide input range1.5~2KVAC isolation by models
SKU SD-350B-48
$110.14 USD
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In stock
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Overview

SD-350B-48 is the 48V output model of this series: rated current 7.3A, rated power 350.4W, typical efficiency 84%.

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-350B-48Specifications from the official datasheet (2024-11-22 edition)

OUTPUT

DC VOLTAGE
48V
RATED CURRENT
7.3A
CURRENT RANGE
0 ~ 7.3A
RATED POWER
350.4W
RIPPLE & NOISE (max.)Note.2
200mVp-p
VOLTAGE ADJ. RANGE
43 ~ 53VDC
VOLTAGE TOLERANCENote.3
±1.0%
LINE REGULATION
±0.2%
LOAD REGULATION
±1.0%
SETUP, RISE TIME
300ms, 50ms at full load

INPUT

VOLTAGE RANGE
20 ~ 36VDC
EFFICIENCY (Typ.)
84%
DC CURRENT (Typ.)
17.6A/24V
INRUSH CURRENT (Typ.)
C:45A/48VDC D:45A/96VDC

PROTECTION

OVERLOAD
105 ~ 135% rated output power Protection type : Shut down o/p voltage, re-power on to recover
OVER VOLTAGE
53 ~ 65V 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-350B-48 Mechanical Specification
Mechanical Specification
SD-350B-48 Block Diagram
Block Diagram
SD-350B-48 Derating Curve
Derating Curve

Downloads

FAQ

Can I use the SD-350B-48 for 48V telecom or networking equipment from a 20-36V DC input?

Yes, this model converts a 20-36V input to a constant 48V output. Its 350.4W rating and 7.3A output make it suitable for 48V equipment that needs regulated DC power in telecom, networking, or industrial systems.

Is the SD-350B-48 appropriate for 48V industrial automation devices or controllers?

It can be, provided the load expects a constant 48V supply and stays within 7.3A. The 350.4W output rating sets the total power budget for the connected automation loads.

Can this converter support a 48V embedded or communications subsystem in a vehicle or cabinet?

Yes, if the available source is within 20V to 36V and the downstream equipment requires regulated 48V DC. The model is designed as a constant-voltage converter and includes 1.5KVAC input-output isolation (2KVAC input to FG), which is relevant in many industrial and embedded power architectures.

Can the SD-350B-48 be used outdoors or in wide-temperature locations?

The published operating temperature range is -20°C to +60°C, so it is specified for that temperature span. No IP rating appears in the provided specs, so outdoor suitability is not confirmed by the listed information.

How does the SD-350B-48 compare to the other SD-350B voltage options?

In the same SD-350B series, the 5V version is 285W at 57A, the 12V version is 330W at 27.5A, the 24V version is 350.4W at 14.6A, and this 48V version is 350.4W at 7.3A. The main differences are the output voltage and the current available at that voltage.

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Mean Well SD-350B-48 DC-DC Converter - 350W - 19~36V in 48V out 7.3A
Mean Well

Mean Well SD-350B-48 DC-DC Converter - 350W - 19~36V in 48V out 7.3A

$110.14 USD

SD-350B-48 is the 48V output model of this series: rated current 7.3A, rated power 350.4W, typical efficiency 84%.

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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