Name: MEAN WELL RSDW20UW series: Isolated single-output DC-DC converter - RSDW20UW-12
Brand: MEAN WELL
SKU: RSDW20UW-12
Price: 150.32 USD
Availability: InStock

MEAN WELL RSDW20UW series: Isolated single-output DC-DC converter - RSDW20UW-12

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Description

RSDW20UW-12 — Isolated single-output DC-DC converter

MEAN WELL RSDW20UW-12 is an isolated, regulated single-output DC-DC converter accepting 8.5–160 V DC. It provides 12 V DC with 1670 mA. Its fully encapsulated 2 × 1 inch package is intended for railway applications; no minimum load is required.

Download MEAN WELL RSDW20UW Datasheet (PDF)

Series section: PDF pages 19–26.

Model and output specifications

Output voltage	12 V DC.
Rated output current	1670 mA.
Series power and load limit	20 W series. Observe rated current and total output power together.
Minimum load	No minimum load is required.
Voltage accuracy	±1.0%
Line regulation	±0.2%; low-to-high input at rated load.
Load regulation	±0.3%, measured over 0–100% load.
Ripple and noise	100 mVp-p. Measured at 20 MHz bandwidth with a 12-inch twisted pair terminated with 0.1 µF and 47 µF capacitors.
Switching frequency	200 kHz typical.
Maximum capacitive load	3300 µF.

Input, control and protection

Input voltage	8.5–160 V DC, 18:1 range. Nominal inputs listed are 12, 24, 48, 72, 96 and 110 V; specification test input is 72 V.
Input current	10 mA at no load; 312 mA at full load.
Typical efficiency	89% at the reference conditions.
Input filter and fuse	Pi filter; recommended external 4 A fast-acting fuse.
Input surge withstand	200 V DC for 100 ms maximum.
Input undervoltage protection	Start-up 9 V; shutdown 8 V.
Overload protection	110–180% of rated output power; automatic recovery after removal of the fault.
Short-circuit protection	Continuous protection with automatic recovery.
Output overvoltage protection	Clamp by diode.
Thermal protection	Thermal shutdown is specified at +110°C case temperature; the permitted case temperature is +105°C. A separate restart threshold is not stated.
Remote ON/OFF	Referenced to −Vin: >4–160 V or open circuit turns the output ON; <1.2 V or a short circuit turns it OFF.
Output adjustment	Typical adjustment range: −20% to +15% using the single-output trim circuit. At 8.5 V input the upper output limit is 12 V; it rises to 13.8 V at 10 V input. The plotted lower output limit is 9.6 V. Observe the input-dependent trim boundary. Connect a trim resistor between Trim and −Vout to raise the output voltage, or between Trim and +Vout to lower it.

Operating conditions and isolation

Operating temperature and cooling	−40 to +95°C; free-air convection. Apply the load-derating limits.
Load derating	Full load through 77°C; 60% load at 95°C.
Maximum case temperature	105°C.
Working humidity	20–90% RH, non-condensing.
Storage conditions	−55 to +125°C; 10–95% RH, non-condensing.
Temperature coefficient	±0.03%/°C over 0–95°C.
Vibration	10–500 Hz, 2G; 10 minutes per cycle for 60 minutes along each of the X, Y and Z axes.
Reference test conditions	72 V DC input, rated load, 25°C and 70% RH, unless otherwise stated.
Input-to-output withstand voltage	3 kV AC.
Isolation resistance	100 MΩ.
Isolation capacitance	20 pF typical.
Input-voltage derating	70% load at 8.5 V input; 100% from 12 to 160 V, subject also to temperature derating.
Altitude	Up to 5000 m. Above 2000 m, reduce the allowable ambient temperature by 3.5°C for each additional 1000 m.

Mechanical design and installation

Dimensions	50.8 × 25.4 × 10.2 mm (L × W × H).
Case construction	Fully encapsulated black-coated copper case with a non-conductive base.
Pin assignment	1 +Vin; 2 −Vin; 3 +Vout; 4 Trim; 5 −Vout; 6 Remote ON/OFF. Check the bottom-view orientation before PCB assembly.
Mechanical drawing details	Lead length 5.6 mm minimum. Drawing tolerances: x.x ±0.5 mm; x.xx ±0.25 mm. The pin-diameter note and drawing differ; confirm the supplied pin dimensions before finalizing the PCB holes.
Unit weight reference	35 g, explicitly stated as a catalog packing reference per unit.
Soldering	1–3 seconds at 260°C maximum, measured 1.5 mm from the case.

EMC and manufacturer references

Safety and catalog references	UL 62368-1 and EAC TP TC 004 references are listed in the catalog.
EMC emission	EN 50121-3-2 conducted Class A / Class B with external circuitry. The radiated-emission table entry is N/A.
EMC immunity	ESD: 8 kV air / 6 kV contact, Level 3; radiated RF: 20 V/m, 80–1000 MHz, Level 3; conducted RF: 10 V, 0.15–80 MHz, Level 3; surge: 4 kV line-to-earth / 2 kV line-to-line, Level 4; EFT: 2 kV power line, Level 3, with the specified external input capacitor.
MTBF reference	1570 khrs to MIL-HDBK-217F at 25°C; a reliability reference, not a service-life guarantee.
Manufacturer warranty reference	The catalog states a 3-year manufacturer warranty.
Railway application	EN 50155 with EN 50121-3-2 EMC and EN 61373 shock/vibration references; apply the specified external circuitry and verify the completed equipment.
EMC filter example	Reference test: 110 V input at full load. C1–C3: 1 µF/250 V, 1812 X7R; C4: 120 µF/220 V KXJ; CY1: 680 pF/400 V AC Y1; CY2/CY3: 500 pF/400 V AC; CY4/CY5: 2200 pF/400 V AC. Use the complete manufacturer circuit, including insulation and mounting requirements.
Filter inductors	L1: 1.4 mH, 0.4 mm × 1 / 13 turns, ACME A151 T10×5×5C (G91C9925115). L2: 10 µH, 7 A, Vishay 2525CZ (G91B0904007). Confirm current component availability and ratings.