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Mean Well

Mean Well NSD15-48S12 DC-DC Converter - 15W - 18~72V in 12V out 1.25A

SKU NSD15-48S12
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Overview

NSD15-48S12 is the 12V output model of this series: rated current 1.25A, rated power 15W, typical efficiency 84%.

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

NSD15-48S12Specifications from the official datasheet (2024-10-30 edition)

OUTPUT

DC VOLTAGE
12V
RATED CURRENT
1.25A
CURRENT RANGE
0.06 ~ 1.25A
RATED POWER
15W
CAPACITIVE LOAD (max.)
3300uF
RIPPLE & NOISE (max.)Note.2
75mVp-p(25% ~ 100% load)
VOLTAGE TOLERANCENote.3
±2.0%
LINE REGULATION
±1.0% at 10% ~ 100% load
LOAD REGULATION
±1.0% at 10% ~ 100% load
TRIM OUTPUT (Typ.)
±5.0%
SETUP TIME
100ms/RATED DC INPUT at full Load

INPUT

RATED DC INPUT
48VDC
VOLTAGE RANGE
18 ~ 72VDC
EFFICIENCY (Typ.)
84%
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)
13.8 ~ 18V
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

NSD15-48S12 Mechanical Specification
Mechanical Specification
NSD15-48S12 Block Diagram
Block Diagram
NSD15-48S12 Derating Curve
Derating Curve

Downloads

FAQ

Can I use the NSD15-48S12 to power 12V automation controllers or industrial I/O modules?

Yes, if the equipment requires constant-voltage 12V output and draws no more than 1.25A. With a 15W rating, it fits lower-power control, interface, and monitoring hardware rather than heavier 12V loads.

Is this a good fit for 12V instrumentation in a compact industrial panel?

It can be a fit for compact 12V instrumentation because the module provides 12V constant-voltage output and measures 50.8 × 38.1 × 9.82 mm. That combination is useful when panel space is limited and the connected device stays within 15W.

Can the NSD15-48S12 support 12V embedded electronics in telecom or control equipment?

It is suitable for embedded 12V electronics that need up to 1.25A from a regulated output. The listed input range is 18~72VDC, so it is aimed at systems where that DC input range matches the available source.

Would this model work for 12V relays, indicators, or low-power accessory loads in automation systems?

It can support 12V accessory loads when the total draw remains within 1.25A and 15W. Because it is a constant-voltage supply, it is better matched to loads that expect a fixed 12V rail rather than variable-power operation.

Can I use the NSD15-48S12 in cold or high-heat equipment environments?

The specified 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. The specs do not list an IP rating, so temperature capability is stated, but outdoor exposure protection is not.

What is the difference between the NSD15-48S12 and the other 48-input NSD15 versions?

NSD15-48S12 is the 12V, 1.25A, 15W single-output option in the 18~72VDC input group. The other models in that group are NSD15-48S3 at 12.375W and 3.3V at 3.75A, NSD15-48S5 at 15W and 5V at 3A, and NSD15-48S15 at 15W and 15V at 1A.

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Mean Well NSD15-48S12 DC-DC Converter - 15W - 18~72V in 12V out 1.25A
Mean Well

Mean Well NSD15-48S12 DC-DC Converter - 15W - 18~72V in 12V out 1.25A

Log in to see price

NSD15-48S12 is the 12V output model of this series: rated current 1.25A, rated power 15W, typical efficiency 84%.

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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