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Mean Well

Mean Well NSD15-12S3 DC-DC Converter - 12.375W - 9.4~36V in 3.3V out 3.75A

SKU NSD15-12S3
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Overview

NSD15-12S3 is the 3.3V output model of this series: rated current 3.75A, rated power 12.375W, typical efficiency 73%.

Features

  • Wide 4:1 DC input range
  • Protections: Short circuit / Overload / Over voltage
  • 1500VDC I/O isolation
  • Built-in EMI filter
  • Cooling by free air convection
  • Output voltage trimming function
  • Built-in remote ON-OFF control
  • 100% full load burn-in test
  • Low cost
  • High reliability
  • 2 years warranty

Specifications

NSD15-12S3Specifications from the official datasheet (2024-10-30 edition)

OUTPUT

DC VOLTAGE
3.3V
RATED CURRENT
3.75A
CURRENT RANGE
0.18 ~ 3.75A
RATED POWER
12.375W
CAPACITIVE LOAD (max.)
3300uF
RIPPLE & NOISE (max.)Note.2
100mVp-p(25% ~ 100% load) for 3.3V only
VOLTAGE TOLERANCENote.3
±2.0%
LINE REGULATION
±1.0% at 10% ~ 100% load
LOAD REGULATION
±1.0% at 10% ~ 100% load
TRIM OUTPUT (Typ.)
+10%
SETUP TIME
100ms/RATED DC INPUT at full Load

INPUT

RATED DC INPUT
12VDC
VOLTAGE RANGE
9.4 ~ 36VDC
EFFICIENCY (Typ.)
73%
DC CURRENT
1.8A/12VDC
SHUTDOWN IDLE CURRENT
20mA

PROTECTION

OVERLOAD
Above 105% rated output power Protection type : Over power limiting, recovers automatically after fault condition is removed
OVER VOLTAGE(CLAMP)
5.8 ~ 6.93V
SHORT CIRCUITNote.4
Recovers automatically after fault condition is removed

FUNCTION

ON/OFF CONTROL
Logic "1" or open circuit : ON Logic "0" or short to PIN2 : OFF

ENVIRONMENT

WORKING TEMP.
-25 ~ +70℃
WORKING HUMIDITY
0% ~ 95% RH max.
STORAGE TEMP., HUMIDITY
-40 ~ +85℃, 0 ~ 95% RH
TEMP. COEFFICIENT
±0.03%/℃ (0~50℃)

SAFETY & EMC (Note 5)

SAFETY STANDARDS
UL62368-1, EAC TP TC 004 approved, Design refer to BS EN/EN62368-1
ISOLATION VOLTAGE
I/P-O/P:1.5KVDC
ISOLATION RESISTANCE
I/P-O/P:100M Ohms / 500VDC / 25℃/ 70% RH
EMC EMISSION
Compliance to BS EN/EN55032 (CISPR32) Class B, EAC TP TC 020
EMC IMMUNITY
Compliance to BS EN/EN61000-4-2,3,4,6,8; BS EN/EN55035, light industry level, EAC TP TC 020

OTHERS

MTBF
12058.3K hrs min. Telcordia SR-332 (Bellcore) ; 1734.0K hrs min. MIL-HDBK-217F (25℃)
DIMENSION
50.8*38.1*9.82mm (2"*1.5"*0.387") (L*W*H)
PACKING
0.03Kg; 180pcs/6.4Kg/0.94CUFT
Test conditions and notes8
  1. 1. All parameters NOT specially mentioned are measured at 12, 48VDC input, rated load and 25℃ of ambient temperature.
  2. 2. Ripple & noise are measured at 20MHz of bandwidth by using a 12" twisted pair-wire terminated with a 0.1μF & 47μF parallel capacitor.
  3. 3. Tolerance : includes set up tolerance, line regulation and load regulation.
  4. 4. Short circuit no more than 60 seconds.
  5. 5. 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 230mm*230mm 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 https://www.meanwell.com//Upload/PDF/EMI_statement_en.pdf )
  6. 6. Derating to 80% load is needed for NSD15-48S series at 18Vdc input voltage. Full output wattage can be acquired when the input voltage is higher than 20Vdc.
  7. 7. EMC filter suggestion:
  8. 8. 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

NSD15-12S3 Mechanical Specification
Mechanical Specification
NSD15-12S3 Block Diagram
Block Diagram
NSD15-12S3 Derating Curve
Derating Curve

Downloads

FAQ

Can I use the NSD15-12S3 for 3.3V embedded boards or logic circuits?

Yes, if the board or logic circuit needs a constant 3.3V supply and stays within 3.75A and 12.375W. This model accepts 9.4~36V input and provides constant-voltage 3.3V output.

Is this converter a fit for 3.3V industrial communication or controller electronics?

It can fit industrial communication or controller electronics that require regulated 3.3V power and draw no more than 3.75A. The 9.4~36V input range is useful where the source voltage varies within that specified range.

Can I use the NSD15-12S3 for low-voltage automation electronics that run on 3.3V?

Yes, if the automation electronics are designed for constant 3.3V operation and remain within 12.375W total load. Its output is limited to 3.75A, so the connected 3.3V load needs to stay at or below that value.

Is the NSD15-12S3 appropriate for indoor-only use, or can it handle demanding temperatures?

Its specified working temperature is -25°C to +70°C (storage -40°C to +85°C), with load derating at higher ambient temperatures per the derating curve. No IP rating is provided, so the specs do not establish protection for outdoor exposure, dust ingress, or water exposure.

What are the main output options across the NSD15 family compared with the NSD15-12S3?

Across the series, outputs are 3.3V at 3.75A and 12.375W, 5V at 3A and 15W, 12V at 1.25A and 15W, and 15V at 1A and 15W. Each output is offered in a 9.4~36VDC input model (NSD15-12S) and an 18~72VDC input model (NSD15-48S). The NSD15-12S3 is the 9.4~36VDC input, 3.3V, 3.75A, 12.375W single-output version.

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Mean Well NSD15-12S3 DC-DC Converter - 12.375W - 9.4~36V in 3.3V out 3.75A
Mean Well

Mean Well NSD15-12S3 DC-DC Converter - 12.375W - 9.4~36V in 3.3V out 3.75A

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NSD15-12S3 is the 3.3V output model of this series: rated current 3.75A, rated power 12.375W, typical efficiency 73%.

Features

  • Wide 4:1 DC input range
  • Protections: Short circuit / Overload / Over voltage
  • 1500VDC I/O isolation
  • Built-in EMI filter
  • Cooling by free air convection
  • Output voltage trimming function
  • Built-in remote ON-OFF control
  • 100% full load burn-in test
  • Low cost
  • High reliability
  • 2 years warranty
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