Over 15 years experience of providing support of MEAN WELL Power Supplies
Mean Well SCW03B-12 DC-DC Converter - 3W 18~36V DC in 12V out 250mA
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SCW03B-12 is the 12V output model of this series: rated power 3W, typical efficiency 80%.
Features
- 2:1 wide input range
- 4:1 wide input range(option)
- 1000VDC I/O isolation
- 3000VDC I/O isolation(option)
- Built-in EMI filter
- Protections: Short circuit / Overload
- Cooling by free air convection
- Five-sided shield metal case
- 100% burn-in test
- Low cost / High reliability
- Approvals: FCC / CE
- 2 years warranty
Specifications
OUTPUT
- DC VOLTAGE
- 12V
- CURRENT RANGE
- 25 ~ 250mA
- RATED POWER
- 3W
- RIPPLE & NOISE (max.)Note.2
- 60mVp-p
- LINE REGULATIONNote.3
- ±0.5%
- LOAD REGULATIONNote.4
- ±0.5%
- VOLTAGE ACCURACY
- ±2.0%
- SWITCHING FREQUENCY
- 50KHz min.
INPUT
- VOLTAGE RANGE
- 18 ~ 36VDC
- EFFICIENCY (Typ.)
- 80%
- DC CURRENT Full load
- 167mA
- DC CURRENT No load
- 10mA
- FILTER
- Pi network
- PROTECTION
- Fuse recommended
PROTECTION (Note. 5)
- OVERLOAD
- 160 ~ 250% 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
ENVIRONMENT
- WORKING TEMP.
- -40 ~ +71℃ (Refer to "Derating Curve")
- WORKING HUMIDITY
- 20% ~ 90% RH non-condensing
- STORAGE TEMP., HUMIDITY
- -40 ~ +105℃, 10 ~ 95% RH
- TEMP. COEFFICIENT
- ±0.03% / ℃ (0 ~ 50℃)
- VIBRATION
- 10 ~ 500Hz, 2G 10min./1 cycle, period for 60min. each along X, Y, Z axes
SAFETY & EMC
- SAFETY STANDARDS
- EAC TP TC 004 approved
- WITHSTAND VOLTAGE
- I/P-O/P:1KVDC
- ISOLATION RESISTANCE
- I/P-O/P: 100M Ohms / 500VDC / 25℃/ 70% RH
- ISOLATION CAPACITANCE
- 80pF max.
- EMC EMISSION
- Compliance to EN55032 Class B, FCC part 15 Class B , EAC TP TC 020
- EMC IMMUNITY
- Compliance to EN61000-4-2,3,4,5,6,8, light industry level, criteria A , EAC TP TC 020
OTHERS
- MTBF
- 900khrs min. MIL-HDBK-217F(25℃)
- DIMENSION
- 31.8*20.3*12.2mm or 1.25"*0.80"*0.48" inch (L*W*H)
- WEIGHT
- 15g
Test conditions and notes5
- 1.All parameters are specified at normal input, rated load, 25℃ 70% RH ambient.
- 2.Ripple & noise are measured at 20MHz by using a 12" twisted pair terminated with a 0.1uf & 47uf capacitor.
- 3.Line regulation is measured from low line to high line at rated load.
- 4.Load regulation is measured from 10% to 100% rated load.
- 5.Please prevent the converter from operating in overload or short circuit condition for more than 30 seconds.
Technical drawings
Downloads
Datasheet1
Certificates3
FAQ
What are the key electrical ratings of the Mean Well SCW03B-12?
The SCW03B-12 is a 3W DC-DC converter with a 18 to 36V DC input range and a regulated 12V DC output. Its rated output current is 0.25A. This makes it a compact option for low-power 12V DC conversion within a 24V-class input system.
Is the SCW03B-12 suitable for systems that need a wide input voltage range?
Yes. This model has a 2:1 wide input range, specified here as 18 to 36V DC, which gives more tolerance for input variation than a fixed-input converter. That makes it relevant for industrial and embedded DC systems where the supply voltage may fluctuate within that range.
Does the Mean Well SCW03B-12 require a minimum load to regulate properly?
Yes. The SCW03B-12 is specified for an output current range of 25 to 250mA, so the load should draw at least 25mA (10% of rated load). Load regulation of ±0.5% is specified from 10% to 100% of rated load, which designers of control and monitoring electronics with very light loads should take into account.
What protection and isolation features does the SCW03B-12 include?
This model includes short-circuit protection and overload protection, both in hiccup mode with automatic recovery after the fault is removed. It also provides 1KVDC input-to-output isolation. Those features support use in applications where protection and electrical separation are important selection criteria.
Can the SCW03B-12 be used in demanding temperature environments?
It is designed for wide-temperature operation, with product data listing operation down to -40°C and up to 71°C. Output must be derated at higher ambient temperatures according to the datasheet's derating curve. Buyers should still confirm the full system thermal design around the converter.
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Other SCW03 Models
8 other models| Model | Power | Voltage | Current | IP Rating | |
|---|---|---|---|---|---|
| Mean Well SCW03B-05 DC-DC Converter - 3W 18~36V DC in 5V out 600mA | 3W | 5V | 0.6A | IP20 | View |
| Mean Well SCW03C-15 DC-DC Converter - 3W 36~72V DC in 15V out | 3W | 15V | 0.2A | — | View |
| Mean Well SCW03C-12 DC-DC Converter - 3W 36~72V DC in 12V out | 3W | 12V | 0.25A | — | View |
| Mean Well SCW03C-05 DC-DC Converter - 3W 36~72V DC in 5V out | 3W | 5V | 0.6A | — | View |
| Mean Well SCW03B-15 DC-DC Converter - 3W 18~36V DC in 15V out | 3W | 15V | 0.2A | — | View |
| Mean Well SCW03A-15 DC-DC Converter - 3W 9~18V DC in 15V out | 3W | 15V | 0.2A | — | View |
| Mean Well SCW03A-12 DC-DC Converter - 3W 9~18V DC in 12V out | 3W | 12V | 0.25A | — | View |
| Mean Well SCW03A-05 DC-DC Converter - 3W 9~18V DC in 5V out 600mA | 3W | 5V | 0.6A | IP20 | View |
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