Name: MEAN WELL SFTN02 series: 2W isolated DC/DC converter - SFTN02M-05
Brand: MEAN WELL
SKU: SFTN02M-05
Price: 16.26 USD
Availability: InStock

MEAN WELL SFTN02 series: 2W isolated DC/DC converter - SFTN02M-05

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Description

SFTN02M-05 — 2W isolated DC/DC converter

MEAN WELL SFTN02M-05 is an isolated, unregulated 2 W DC/DC converter in an SMD package with an industry-standard pinout. It accepts 10.8–13.2 V DC input (12 V nominal) and provides a single output of 5 V DC, with 40–400 mA. Observe the stated minimum load, regulation and cooling conditions.

Download MEAN WELL SFTN02 Datasheet (PDF)
Download MEAN WELL EMI Testing Guidance (PDF)

SFTN02 electrical, environmental, mechanical and packing specifications: PDF pages 21–25.

Model selection and output

Complete model / series	SFTN02M-05 / SFTN02. Input code M: 12 V nominal; output code 05: 5 V. Blank suffix identifies the standard version.
Conversion and rated power	2 W rated. Rounded current values do not increase the rated power; observe the current window and thermal limits.
Output voltage and current	5 V DC; 40–400 mA. The lower current value is the specified minimum load.
Efficiency	80% typical; at normal input, rated load, 25°C and 70% RH.
Series efficiency reference	The SFTN02 feature page states efficiency up to 82%; use this model's typical efficiency above for selection.
Maximum capacitive load	220 µF.
Voltage accuracy	±2.0%.
Ripple and noise	75 mVp-p. Measured at 20 MHz bandwidth using a 12-inch twisted pair terminated with 0.1 µF and 47 µF capacitors.
Line regulation	1.2% for 1% input variation; measured from low line to high line at rated load.
Load regulation	±8%; measured from 10% to 100% rated load.
Switching frequency	100 kHz typical.
Specification conditions	12 V DC normal input, rated load, 25°C and 70% RH, unless otherwise specified.

Input, protection and isolation

Input voltage	12 V DC nominal, ±10%; operating range 10.8–13.2 V DC.
Input current	No load: 25 mA; full load: 208 mA. The general specification conditions apply.
Input filter	Internal capacitor.
Recommended input fuse	300 mA slow-blow fuse recommended.
Internal power dissipation	500 mW.
Input surge voltage	16 V DC for 100 ms maximum. This is a surge limit, not the continuous operating range.
Short-circuit protection	0.5 second maximum; do not rely on continuous short-circuit operation.
Input/output withstand voltage	3 kV DC between input and output.
Isolation resistance	100 MΩ between input and output; at 500 V DC, 25°C and 70% RH.
Isolation capacitance	80 pF typical.

Environment and reliability

Operating temperature	−40 to +100°C, subject to the model-specific cooling and derating curve.
Case temperature	+105°C maximum.
Cooling and derating	PDF page 24, natural convection: 100% load from −40 to +90°C, 50% at +95°C and 40% at +100°C, within the specified +100°C working limit. The graph beyond +100°C does not extend that limit.
Working humidity	20–90% RH, non-condensing.
Storage temperature and humidity	−55 to +125°C; 10–95% RH, non-condensing.
Temperature coefficient	0.03%/°C over 0–90°C.
Vibration	10–500 Hz, 2 G; 10 minutes per cycle, 60 minutes along each of the X, Y and Z axes.
MTBF	880,000 hours minimum, MIL-HDBK-217F at 25°C. This reliability figure is not a service-life or warranty duration.
Manufacturer warranty	3 years, as stated in the datasheet.
Design and applications	The manufacturer describes the series as low cost. Applications include telecom/datacom systems, wireless networks, industrial control, instruments, analyzers, detectors, data switches and distributed power architectures.

Safety and EMC integration

Safety standards	EAC TP TC 020/2011 approved.
EMC emission	BS EN/EN55032 (CISPR32): conducted entry N/A; radiated Class A without additional EMC components. The separate immunity test requirements still apply.
EMC immunity	BS EN/EN61000-4-2: level 3, ±8 kV air, and level 2, ±4 kV contact; -4-3: level 2, 3 V/m; -4-4: level 1, 0.5 kV at power; -4-5: level 2, 0.5 kV line-to-line; -4-6: level 2, 3 V (e.m.f.); -4-8: level 1, 1 A/m.
Immunity input capacitor	When the module must meet BS EN/EN61000-4-4 and -4-5, an external input filter capacitor is required. The datasheet gives Power Mate's recommendation of 470 µF / 100 V for that condition.

Mechanical details and PCB assembly

Construction	SMD package with industry-standard pinout; non-conductive black plastic case rated UL 94V-0.
Dimensions	15.24 × 10.9 × 7.1 mm (L × W × H), as specified. The bottom view on PDF page 24 separately marks 10.7 mm across the body, while the specification and side view state 10.9 mm; use the dimensioned drawing and confirm the supplied outline when designing the footprint.
Pin assignment	Pin 1 −Vin; pin 2 +Vin; pin 5 −Vout; pin 8 +Vout; pins 3, 6, 7, 10, 11 and 12 N.C. Observe the top/bottom view orientation on PDF page 24.
Pin and drawing geometry	PDF page 24: 2.54 mm pin pitch, shown as 2.54 × 5; 11.1 mm lead span and 8.5 mm underside width. The side drawing marks a local vertical reference of 6.7 mm.
Pin dimensions and tolerances	The general note specifies 0.50 × 0.30 mm pins, with ±0.07 mm pin tolerance. The top view separately labels a 0.55 mm pin dimension; confirm the supplied lead geometry when matching the PCB land pattern. General drawing tolerances: x.x ±0.5 mm and x.xx ±0.25 mm.
PCB land pattern	Top-view grid on PDF page 24: 2.54 mm per grid; pads 1.20 × 1.80 mm; the drawing marks 12.00 mm across the pad rows. Match the numbered pads to the specified pin assignment.
Soldering temperature	At 1.5 mm from the case, 240°C maximum for 1–10 seconds.
Reflow soldering	The curve on PDF page 24 applies only to hot-air reflow soldering: peak 240°C for 10 seconds maximum; time above 220°C is 60 seconds maximum.

Packing and available options

Unit weight	1.2 g, the catalog packing reference per unit; not a measured net or shipping weight.
Standard tube packing	32 pieces per tube; 120 tubes and 3,840 pieces per carton. Tube gross weight 0.061 kg; carton gross weight 8.12 kg. These are standard packing references, not the quantity supplied with an individual order.
Tube and carton dimensions	Tube length 525 ±2 mm. Tube profile references: 12.0 ±0.4, 17.0 ±0.4, 13.5 ±0.4, 8.3 ±0.4, 7.7 ±0.3 and 0.55 ±0.2 mm. Carton 620 × 230 × 230 mm (L × W × H).
Optional reel packing	500 pieces per reel, 5 reels / 2,500 pieces per carton; one-box gross weight 1.3 kg and carton gross weight 7.3 kg. Reel diameter 330 mm and width 32 mm; inner box 355 × 338 × 50 mm, outer carton 380 × 290 × 370 mm.
Reel tape dimensions	W 32 mm (+0.3/−0.1); Ao 11.4 ±0.1 mm; Bo 15.5 ±0.1 mm; Ko 7.4 ±0.1 mm; P1 16 ±0.1 mm. Refer to PDF page 25 for cavity orientation.

Installation and system verification

Complete-system EMC verification	Verify EMC with the converter installed in the final equipment and connected to a representative load. Wiring, assembly and the application affect the result. Follow the model's specified EMC conditions and any required external components; the linked EMI testing guidance does not certify the finished equipment.