Name: MEAN WELL NSD05-S series: Isolated single-output DC/DC converter - NSD05-12S3
Brand: MEAN WELL
SKU: NSD05-12S3
Price: 20.21 USD
Availability: InStock

MEAN WELL NSD05-S series: Isolated single-output DC/DC converter - NSD05-12S3

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Description

NSD05-12S3 — Isolated single-output DC/DC converter

MEAN WELL NSD05-12S3 is a regulated single-output DC/DC converter in the NSD05-S series, with a 9.2–36 V DC input range. Its 3.3 V output is rated at 1.2 A and 3.96 W, with an operating output-current range of 0–1.2 A. Built-in remote ON/OFF control and free-air convection cooling support integration into equipment; observe the load, input and temperature limits below.

Download MEAN WELL NSD05-S Datasheet (PDF)
Download MEAN WELL EMI Testing Guidance (PDF)

Model section: datasheet PDF pages 1–2. Use the complete model specifications and connection drawing for this output selection.

Output selection

Selected output rail	Single output: 3.3 V
Output configuration	3.3 V DC, measured between +VOUT and −VOUT.
Rated output current	1.2 A.
Output current range	0–1.2 A. The specified range includes zero output current.
Rated output power	3.96 W.
Series capability reference	The 5 W NSD05-S family is described as having a wide 4:1 DC input range. The exact input range and rated output power of this model are stated above; the series description does not enlarge those limits.

Electrical specifications

Rated DC input	12 V DC.
Input voltage range	9.2–36 V DC.
Input DC current	0.7 A at 12 V DC.
Shutdown idle current	5 mA at 12 V DC.
Efficiency	72% typical.
Capacitive load	1000 µF maximum.
Ripple and noise	75 mVp-p maximum.
Voltage tolerance	±2.0% max. Includes setup tolerance, line regulation and load regulation.
Line regulation	±1.0%.
Load regulation	±2.0%.
Setup time	80 ms at rated DC input and full load.

Control, connections and protection

Pin assignment	Pin 1: +INPUT; pin 2: −INPUT (GND); pin 3: +VOUT; pin 4: −VOUT; pin 5: CONTROL.
Remote ON/OFF control	CONTROL input is pin 5, referenced to pin 2 (−VIN). CMOS or open-collector TTL compatible. ON: +5.5 V DC minimum or open circuit. OFF: +2.5 V DC maximum or short CONTROL to pin 2.
Overload protection	Above 105% of rated output power; over-power limiting with automatic recovery after the fault is removed.
Overvoltage clamp	3.8–4.6 V.
Short-circuit protection	Automatic recovery after the fault is removed.

Operating conditions

Cooling and load derating	Free-air convection; horizontal installation. The curve shows 80% load at −25°C, 100% from −10°C through +60°C, and 75% at +70°C. Follow the curve between marked points; the operating range ends at +70°C.
Environment	Working temperature: −25 to +70°C with derating. Working humidity: 0%–95% RH maximum. Storage: −40 to +85°C, 0%–95% RH.
Temperature coefficient	±0.03%/°C over 0 to +60°C.
High-altitude derating	Above 2000 m, reduce the applicable ambient-temperature limit by 3.5°C per 1000 m for this fanless converter.
General measurement conditions	Unless specifically stated otherwise, parameters are measured at 12 V DC input, rated load and +25°C ambient.
Ripple measurement	20 MHz bandwidth; a 12-inch twisted-pair wire terminated with 0.1 µF and 47 µF capacitors connected in parallel.

Safety and EMC integration

Safety standards	TUV BS EN/EN62368-1 and IEC62368-1 CB approved by TUV; EAC TP TC 004 approved.
Input/output isolation	1000 V DC.
Isolation resistance	100 MΩ between input and output, measured at 500 V DC, +25°C and 70% RH.
EMC emission	Compliance with BS EN/EN55032 (CISPR32) Class B and EAC TP TC 020, subject to the stated component test arrangement and final-equipment verification.
EMC immunity	Compliance with BS EN/EN61000-4-2, -3, -4, -5, -6 and -8; BS EN/EN55035, light-industry level; EAC TP TC 020.
EMC test arrangement	The manufacturer tested the converter as a component mounted on a 230 × 230 × 1 mm metal plate. Reconfirm EMC compliance in the final equipment; the test plate is not stated to be a supplied accessory.
Required input capacitor	Add a 47 µF / 100 V electrolytic capacitor with ESR <1 Ω to the input line for proper operation.
Suggested EMC input filter	The input filter drawing shows 5.5 µH inductive filtering and a polarized 680 µF capacitor across the converter input, on the converter side of the inductive elements. The suggestion is marked “TBD”; confirm the finished filter design and component ratings with the manufacturer.

Mechanical details and ordering

Dimensions	40.6 × 25.4 × 8.3 mm (L × W × H); catalog inch dimensions 1.6 × 1 × 0.327 inches.
Mechanical drawing coordinates	From the drawing’s left edge, input/control pins lie at 10.16 mm and output pins at 30.48 mm. From the top edge: pin 5 and pin 4 at 2.54 mm, pin 2 at 10.16 mm, pin 1 at 15.24 mm and pin 3 at 22.86 mm.
Mechanical side-view details	0.64 mm square pins. The side view labels 8.3 mm overall component height, 6 mm above-board height, and separate 1.5 mm and 3 mm mounting/lead dimensions; use the illustrated reference surfaces.
Drawing tolerance	±1 mm (±0.04 inch), as stated in the mechanical drawing.
Switching frequency	350 kHz, as labelled fosc in the PWM block diagram.
Built-in features	remote ON/OFF control; short-circuit, overload and overvoltage protection.
Reliability and production test	The series is presented as a low-cost, high-reliability design and receives a 100% full-load burn-in test.
MTBF	11455.9 K hours minimum by Telcordia SR-332 (Bellcore); 1734.0 K hours minimum by MIL-HDBK-217F at +25°C.
Weight and packing	7 g catalog packing reference per unit, not a measured net weight. Bulk packing: 700 pieces / 5.9 kg / 1.23 CUFT.
Manufacturer warranty	2 years.
Accessory scope	No dedicated accessory ordering code is specified in this series datasheet. External filter components must be selected for the application.

Final-equipment EMC 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 test conditions and any required external components; the linked EMI testing guidance does not certify the finished equipment.