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Mean Well SD-50B-12 DC-DC Converter - 50W - 19~36V in 12V out 4.2A
Overview
SD-50B-12 is the 12V output model of this series: rated current 4.2A, rated power 50.4W, typical efficiency 75%.
Features
- 2:1 wide input range
- Protections: Short circuit / Overload / Over voltage
- 1500VAC I/O isolation
- Built-in EMI filter, low ripple noise
- 100% full load burn-in test
- Fixed switching frequency at 83KHz
- Low cost
- High reliability
- 2 years warranty
Specifications
OUTPUT
- DC VOLTAGE
- 12V
- RATED CURRENT
- 4.2A
- CURRENT RANGE
- 0 ~ 4.2A
- RATED POWER
- 50.4W
- RIPPLE & NOISE (max.)Note.2
- 120mVp-p
- VOLTAGE ADJ. RANGE
- 11 ~ 16VDC
- VOLTAGE TOLERANCENote.3
- ±1.0%
- LINE REGULATION
- ±0.3%
- LOAD REGULATION
- ±0.3%
- SETUP, RISE, HOLD UP TIME
- 2.5s, 50ms, ------ at full load
INPUT
- VOLTAGE RANGE
- B:19 ~ 36VDC
- EFFICIENCY (Typ.)
- 75%
- DC CURRENT
- 3A/24V
PROTECTION
- OVERLOAD
- 105 ~ 150% rated output power Protection type : Hiccup mode, recovers automatically after fault condition is removed
- OVER VOLTAGE
- 16.8 ~ 20V/10% load Protection type : Hiccup mode, recovers automatically after fault condition is removed
ENVIRONMENT
- WORKING TEMP.
- -10 ~ +60℃ (Refer to "Derating Curve")
- WORKING HUMIDITY
- 20 ~ 90% RH non-condensing
- STORAGE TEMP., HUMIDITY
- -20 ~ +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
- Design refer to LVD,EAC TP TC 004, AS/NZS 62368.1 approved
- 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 EN55032 (CISPR32) Class B, EAC TP TC 020
- EMC IMMUNITY
- Compliance to EN61000-4-2,3,4,6,8, EN55024, heavy industry level, criteria A, EAC TP TC 020
OTHERS
- MTBF
- 357.5K hrs min.(SD-50B) MIL-HDBK-217F (25℃)
- DIMENSION
- 159*97*38mm (L*W*H)
- PACKING
- 0.43Kg; 24pcs/11.35Kg/0.83CUFT
Test conditions and notes5
- 1. All parameters NOT specially mentioned are measured at 12,24,48VDC input, rated load and 25℃ of ambient temperature.
- 2. Ripple & noise are measured at 20MHz of bandwidth by using a 12" twisted pair-wire terminated with a 0.1uf & 47uf parallel capacitor.
- 3. Tolerance : includes set up tolerance, line regulation and load regulation.
- 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 http://www.meanwell.com)
- 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
Downloads
FAQ
Can I use the SD-50B-12 for a 12V PLC or industrial controller that runs from a 19-36V source?
Yes, this converter provides a 12V constant-voltage output and is rated for 4.2A. It is designed for systems with a 19-36V input range that need regulated 12V power.
Is the SD-50B-12 suitable for 12V automation relays, HMIs, or panel accessories?
It can be used for 12V control and automation loads that require constant voltage and stay within the 4.2A output rating. The listed input range is 19-36V, so it is matched to equipment powered from that source window.
Can this model power embedded 12V electronics inside industrial equipment?
It is a fit for embedded or industrial electronics that need regulated 12V output up to 4.2A. The converter's constant-voltage mode and 19-36V input range are the key selection points for that use.
Is the SD-50B-12 suitable for outdoor enclosures?
The specs define an operating temperature range of -10C to +60C, but they do not list an IP rating. Based on the provided data, temperature capability is stated while outdoor or weather-exposed use is not specified.
What is the difference between SD-50A-12, SD-50B-12, and SD-50C-12?
All three models provide 12V output at 4.2A. The difference is the input range: SD-50A-12 is 9-18V, SD-50B-12 is 19-36V, and SD-50C-12 is 36-72V.
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Other SD-50B Models
2 other models| Model | Power | Voltage | Current | IP Rating | Price | |
|---|---|---|---|---|---|---|
| Mean Well SD-50B-5 DC-DC Converter - 50W - 19~36V in 5V out 10A | 50W | 5V | 10A | IP20 | $26.99 | View |
| Mean Well SD-50B-24 DC-DC Converter - 50W - 19~36V in 24V out 2.1A | 50.4W | 24V | 2.1A | IP20 | $31.06 | View |
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