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Mean Well

Mean Well SKM50B-12 DC-DC Converter - 50W - 18~36V in 12V out 4.17A

SKU SKM50B-12
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Overview

SKM50B-12 is the 12V output model of this series: rated power 50W, typical efficiency 92%.

Features

  • 2"x1" compact size
  • 2:1 wide input range
  • High efficiency up to 92%
  • 1500VDC I/O isolation
  • Built-in remote ON/OFF control
  • Built-in trimming output
  • Comply with CE / FCC without external components
  • Protections: Short circuit / Overload / Input and Output Over voltage
  • Cooling by free air convection
  • Six-sided shield metal case
  • 100% burn-in test
  • Low cost / High reliability
  • Approvals: FCC / EAC / CE / UKCA
  • 2 years warranty

Specifications

SKM50B-12Specifications from the official datasheet (2024-08-02 edition)

OUTPUT

DC VOLTAGE
12V
CURRENT RANGE
0.41 ~ 4.17A
RATED POWER
50W
RIPPLE & NOISE (max.)Note.2
80mVp-p
LINE REGULATIONNote.3
±0.2%
LOAD REGULATIONNote.4
±0.5%
VOLTAGE ACCURACY
±2.0%
SWITCHING FREQUENCY
300KHz typ.
EXTERNAL CAPACITANCE LOAD (max.)
1000uF
EXTERNAL TRIM Adj. RANGE(Typ.)
-20 ~ +10%

INPUT

VOLTAGE RANGE
B: 18 ~ 36VDC
UNDER VOLTAGE SHUTDOWN
B: 16VDC
EFFICIENCY (Typ.)
92%
DC CURRENT Full load
2300mA
DC CURRENT No load
110mA
FILTER
Pi network
REMOTE CONTROL
Power ON : R.C ~ -Vin > 2.5V ~ 30VDC or open circuit ; Power OFF : R.C ~ -Vin < 0.5VDC or short
PROTECTION
Fuse recommended

PROTECTION (Note. 5)

OVER CURRENT
110% ~ 180% rated output power Protection type : Hiccup mode, recovers automatically after fault condition is removed
SHORT CIRCUIT
All output equipped with short circuit Protection type : Hiccup mode, recovers automatically after fault condition is removed
OVER VOLTAGE Input(Typ.)
>40 ~ 50VDC
OVER VOLTAGE Output(Typ.)
5Vo : 7V ~ 8.95V ; 12Vo : 15V ~ 19.2V ; 15Vo : 18V ~ 23.3V Protection type : Clamp by TVS diode

ENVIRONMENT

WORKING TEMP.
-40 ~ +75℃ (Refer to "Derating Curve")
CASE TEMP.
+115℃ max.
WORKING HUMIDITY
20% ~ 90% RH non-condensing
STORAGE TEMP., HUMIDITY
-55 ~ +125℃, 10 ~ 95% RH
TEMP. COEFFICIENT
±0.03% / ℃ (0 ~ 55℃)
VIBRATION
10 ~ 500Hz, 2G 10min./1cycle, period for 60min. each along X, Y, Z axes

SAFETY & EMC

SAFETY STANDARDS
EAC TP TC 020/2011 (EAC TP TC 004 for 48Vin type only) approved
WITHSTAND VOLTAGE
I/P-O/P:1.5KVDC
ISOLATION RESISTANCE
I/P-O/P: 100M Ohms / 500VDC / 25℃/ 70% RH
EMC EMISSIONNote.5
Compliance to BS EN/EN55032 Class A, FCC part 15 Class A without external components , EAC TP TC 020
EMC IMMUNITY
Compliance to BS EN/EN61000-4-2,3,4,5,6,8, light industry level, criteria A , EAC TP TC 020

OTHERS

MTBF
700Khrs min. MIL-HDBK-217F(25℃)
DIMENSION
50.8*25.4*13.7 mm or 2"*1"*0.54" inch (L*W*H)
PACKING
43g ; 10pcs/per tube, 320pcs/32 tube/per carton
Test conditions and notes6
  1. 1.All parameters are specified at normal input, rated load, 25℃ 70% RH ambient.
  2. 2.Ripple & noise are measured at 20MHz by using a 12" twisted pair terminated with a 0.1uf & 47uf capacitor.
  3. 3.Line regulation is measured from low line to high line at rated load.
  4. 4.Load regulation is measured from 10% to 100% rated load.
  5. 5.Consult MEAN WELL for deployment of Class B.
  6. 6.Please prevent the converter from operating in overload or short circuit condition for more than 30 seconds.

Technical drawings

SKM50B-12 Mechanical Specification
Mechanical Specification
SKM50B-12 Packing
Packing

Downloads

FAQ

Can I use the Mean Well SKM50B-12 for industrial control panels that need a regulated 12V supply?

Yes, it is a constant-voltage DC-DC converter with a 12V output rated for 50W and 4.17A. It fits industrial control applications when the connected 12V load stays within 50W and the available input is within 18-36VDC.

Is the SKM50B-12 suitable for embedded systems or compact electronics that run on 12V?

It can be a fit for embedded or compact electronic systems that require a stable 12V rail and draw no more than 4.17A. Its 50.8 × 25.4 × 13.7 mm size and 0.043 kg weight also make it easier to use where space is limited.

Can I use this 50W converter for automation controllers, sensors, and 12V control electronics?

Yes, this model is appropriate for 12V automation electronics when the total load stays within 50W and 4.17A. The constant-voltage 12V output is intended for equipment that expects a fixed 12V supply, and the input range is 18-36VDC.

Would the SKM50B-12 work for IT or communications equipment that needs isolated 12V power from an 18-36VDC source?

It is suitable for IT or communications hardware that needs a 12V constant-voltage output and stays within 50W. Buyers should confirm their source matches the listed 18-36VDC input range and that their equipment does not exceed 4.17A.

Is the SKM50B-12 suitable for outdoor or harsh-environment use?

The operating temperature range is -40°C to +75°C, so it is rated for a wide temperature span. However, no IP rating is listed in the provided specs, so these specs do not indicate outdoor exposure protection and are better aligned with indoor or protected-enclosure use.

How does the SKM50B-12 compare with other SKM50B series models?

The SKM50B-05, SKM50B-12, and SKM50B-15 are all 50W models in the same series. Their outputs are 5V at 10A, 12V at 4.17A, and 15V at 3.33A respectively.

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Mean Well SKM50B-12 DC-DC Converter - 50W - 18~36V in 12V out 4.17A
Mean Well

Mean Well SKM50B-12 DC-DC Converter - 50W - 18~36V in 12V out 4.17A

Log in to see price

SKM50B-12 is the 12V output model of this series: rated power 50W, typical efficiency 92%.

Features

  • 2"x1" compact size
  • 2:1 wide input range
  • High efficiency up to 92%
  • 1500VDC I/O isolation
  • Built-in remote ON/OFF control
  • Built-in trimming output
  • Comply with CE / FCC without external components
  • Protections: Short circuit / Overload / Input and Output Over voltage
  • Cooling by free air convection
  • Six-sided shield metal case
  • 100% burn-in test
  • Low cost / High reliability
  • Approvals: FCC / EAC / CE / UKCA
  • 2 years warranty
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