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Mean Well

Mean Well RSD-100B-12 DC-DC Converter - 100.8W - 16.8~31.2V in 12V out 8.4A

miniature sizeeconomicalwithstand 5G vibration and 70°C operation
SKU RSD-100B-12
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Overview

RSD-100B-12 is the 12V output model of this series: rated current 8.4A, rated power 100.8W, typical efficiency 89%.

Features

  • Compliance to BS EN/EN50155 and BS EN/EN45545-2 railway standard
  • 2:1 wide input range
  • Protections: Short circuit / Overload / Over voltage / Input reverse polarity
  • 4000VDC I/O isolation
  • Cooling by free air convection
  • Half encapsulated
  • Built-in constant current limiting circuit
  • 1U low profile 36mm
  • All using 105℃ long life electrolytic capacitors
  • LED indicator for power on
  • 100% full load burn-in test
  • 3 years warranty

Specifications

RSD-100B-12Specifications from the official datasheet (2025-07-18 edition)

OUTPUT

DC VOLTAGE
12V
RATED CURRENT
8.4A
CURRENT RANGE
0 ~ 8.4A
RATED POWER
100.8W
RIPPLE & NOISE (max.)Note.2
120mVp-p
VOLTAGE TOLERANCENote.3
±2.0%
LINE REGULATION
±0.3%
LOAD REGULATION
±1.0%
SETUP, RISE TIME
800ms, 50ms at full load
HOLD UP TIME (Typ.)
Please refer to page 3 Hold up Time( Load de-rating curve )

INPUT

VOLTAGE RANGE CONTINUOUS
16.8 ~ 31.2VDC
VOLTAGE RANGE 1 SEC.
14.4 ~ 33.6VDC
EFFICIENCY (Typ.)
89%
DC CURRENT (Typ.)
4.8A/24V
INRUSH CURRENT (Typ.)
30A/24VDC
INTERRUPTION OF VOLTAGE SUPPLY
EN50155:2021-Comply with S1 level

PROTECTION

OVERLOAD
105 ~ 135% rated output power Protection type : Constant current limiting, recovers automatically after fault condition is removed
OVER VOLTAGE
13.8 ~ 16.2V Protection type : Shut down o/p voltage, re-power on to recover

ENVIRONMENT

WORKING TEMP.
-40 ~ +55℃ (no derating) ; +70℃ @ 60% load by free air convection ; +70℃ no derating with external base plate, TX class compliance
WORKING HUMIDITY
5 ~ 95% RH non-condensing
STORAGE TEMP.
-40 ~ +85℃
TEMP. COEFFICIENT
± 0.03%/℃ (0 ~ 50℃ )
VIBRATION
10 ~ 500Hz, 5G 10min./1cycle, 60min. each along X, Y, Z axes ; Mounting : compliance to IEC61373
OPERATING ALTITUDE
5000 meters

SAFETY & EMC (Note 5)

SAFETY STANDARDS
IEC 62368-1, UL 62368-1, AS/NZS 62368-1, EAC TP TC 004 approved, Design refer to BS EN/EN62368-1
WITHSTAND VOLTAGE
I/P-O/P:4KVDC I/P-FG:2.5KVDC O/P-FG:2.5KVDC
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) Conduction Emission: Class A, Radiation Emission: Class B, EAC TP TC 020
EMC IMMUNITY
Compliance to BS EN/EN61000-4-2,3,4,5,6,8, BS EN/EN55035, light industry level, EAC TP TC 020
RAILWAY STANDARD
BS EN/EN50155 / IEC60571 including IEC61373 for shock & vibration, BS EN/EN50121-3-2 for EMC ; BS EN/EN45545-2 for fire protection

OTHERS

MTBF
2446.2K hrs min. Telcordia SR-332 (Bellcore) ; 254.2K hrs min. MIL-HDBK-217F (25℃)
DIMENSION
161*68*36mm (L*W*H)
PACKING
0.563Kg; 24pcs/14.5Kg/0.91CUFT
Test conditions and notes6
  1. 1. All parameters NOT specially mentioned are measured at 24,48,110VDC 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. Strongly recommended that external output capacitance should not exceed 5000uF. (Only for: RSD-100-5 / -12)
  5. 5. 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 )
  6. 6. 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

RSD-100B-12 Mechanical Specification
Mechanical Specification
RSD-100B-12 Block Diagram
Block Diagram
RSD-100B-12 Input Under-Voltage Protection
Input Under-Voltage Protection
RSD-100B-12 Hold-up Time
Hold-up Time
RSD-100B-12 Efficiency vs Load & Vin Curve
Efficiency vs Load & Vin Curve
RSD-100B-12 Overload Protection
Overload Protection
RSD-100B-12 LOAD(%)
LOAD(%)
RSD-100B-12 Immunity to Environmental Conditions
Immunity to Environmental Conditions

Downloads

FAQ

Can I use the RSD-100B-12 in a vehicle or battery-powered system that needs 12V output?

Yes, this DC-DC converter is designed for a 16.8~31.2VDC input range and provides a constant 12V output at up to 8.4A. With 100.8W available, it fits mobile, battery-backed, or DC-bus systems that need a regulated 12V rail.

Is the RSD-100B-12 suitable for industrial control electronics running from a higher DC bus?

It can be a good fit when the source is within 16.8~31.2VDC and the load specifically requires 12V DC. The output rating of 8.4A and 100.8W suits control subsystems, embedded hardware, and auxiliary electronics that need more than a light-duty converter.

Would this converter work for mobile automation, AGV, or transport equipment with a 12V auxiliary load?

It is intended for DC-input applications that need a regulated 12V output from a 16.8~31.2VDC input source. Its -40°C to +55°C full-load rating (up to +70°C with derating or an external base plate) and 5G vibration specification make it relevant for harsher mobile or industrial environments.

Can the RSD-100B-12 power embedded computing or communications hardware that expects 12V DC?

Yes, if the equipment is designed for 12V DC and the total draw stays within 8.4A and 100.8W. Because it is a constant-voltage converter, it is meant for stable 12V loads rather than constant-current applications.

Is the RSD-100B-12 appropriate for outdoor or high-temperature equipment?

It operates from -40°C to +55°C without derating, and up to +70°C at 60% load by free air convection or at full load when mounted on an external base plate (EN50155 TX class). However, no IP rating is listed, so it should still be installed in a protected enclosure for outdoor or washdown environments.

How does the RSD-100B-12 compare with the other RSD-100B output versions?

Within the RSD-100B group, the choices are RSD-100B-5 at 100W, 5V, 20A; RSD-100B-12 at 100.8W, 12V, 8.4A; and RSD-100B-24 at 100.8W, 24V, 4.2A. They share the same basic power class, while the output voltage and current change based on the model.

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Other RSD-100B Models

1 other model
ModelPowerVoltageCurrentIP Rating
Mean Well RSD-100B-24 DC-DC Converter - 100.8W - 16.8~31.2V in 24V out 4.2A 100.8W 24V 4.2A IP20 View
View all 85 RSD Series models
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Mean Well RSD-100B-12 DC-DC Converter - 100.8W - 16.8~31.2V in 12V out 8.4A
Mean Well

Mean Well RSD-100B-12 DC-DC Converter - 100.8W - 16.8~31.2V in 12V out 8.4A

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RSD-100B-12 is the 12V output model of this series: rated current 8.4A, rated power 100.8W, typical efficiency 89%.

Features

  • Compliance to BS EN/EN50155 and BS EN/EN45545-2 railway standard
  • 2:1 wide input range
  • Protections: Short circuit / Overload / Over voltage / Input reverse polarity
  • 4000VDC I/O isolation
  • Cooling by free air convection
  • Half encapsulated
  • Built-in constant current limiting circuit
  • 1U low profile 36mm
  • All using 105℃ long life electrolytic capacitors
  • LED indicator for power on
  • 100% full load burn-in test
  • 3 years warranty
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