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Mean Well

Mean Well NSD15-48S3 DC-DC Converter - 12.375W - 18~72V in 3.3V out 3.75A

SKU NSD15-48S3
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Overview

NSD15-48S3 is the 3.3V output model of this series: rated current 3.75A, rated power 12.375W, typical efficiency 77%.

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

NSD15-48S3Specifications 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
48VDC
VOLTAGE RANGE
18 ~ 72VDC
EFFICIENCY (Typ.)
77%
DC CURRENT
0.4A/48VDC
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)
5.61 ~ 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

NSD15-48S3 Mechanical Specification
Mechanical Specification
NSD15-48S3 Block Diagram
Block Diagram
NSD15-48S3 Derating Curve
Derating Curve

Downloads

FAQ

Can I use the NSD15-48S3 to power 3.3V embedded processors or industrial communication boards?

Yes, if the electronics require a constant 3.3V rail and their total current stays within 3.75A. With a 12.375W rating, this model is targeted at higher-current 3.3V logic loads rather than higher-voltage devices.

Is this model suitable for FPGA, MCU, or 3.3V logic sections in automation equipment?

It is a practical match for 3.3V logic sections because it provides regulated 3.3V output with up to 3.75A available. That higher current capacity is useful when the digital load is heavier than what lower-current 3.3V converters can support.

Would the NSD15-48S3 work for industrial IoT gateways or monitoring nodes that run on 3.3V?

It can fit 3.3V gateways, sensor hubs, or monitoring nodes when their total power stays within 12.375W. The listed input range is 18~72VDC, so it should be selected only where that DC source range matches the system design.

Can this converter support multiple low-voltage digital loads from one 3.3V rail?

Potentially yes, because the output current is rated at 3.75A at 3.3V. The total combined load still needs to remain within the 12.375W output rating.

How does the NSD15-48S3 compare to the other NSD15 48-input options?

NSD15-48S3 is the 3.3V option and is rated at 12.375W with 3.75A output. Other 18~72VDC input siblings on the sheet are NSD15-48S5 at 15W and 5V at 3A, NSD15-48S12 at 15W and 12V at 1.25A, and NSD15-48S15 at 15W and 15V at 1A.

Is the NSD15-48S3 meant for outdoor use or only protected equipment spaces?

The working temperature range is -25°C to +70°C (storage -40°C to +85°C), with load derating at higher ambient temperatures per the derating curve. Because no IP rating is listed, the product data does not by itself support claims for direct outdoor exposure or water-resistant use.

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Mean Well NSD15-48S3 DC-DC Converter - 12.375W - 18~72V in 3.3V out 3.75A
Mean Well

Mean Well NSD15-48S3 DC-DC Converter - 12.375W - 18~72V in 3.3V out 3.75A

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NSD15-48S3 is the 3.3V output model of this series: rated current 3.75A, rated power 12.375W, typical efficiency 77%.

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
View product

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