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Mean Well

Mean Well SDR-120-48 Single Output Industrial Power Supply 120W 48V 2.5A - DIN Rail

SKU SDR-120-48
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SDR-120-48
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Overview

SDR-120-48 is the 48V output model of this series: rated current 2.5A, rated power 120W, typical efficiency 90.5%.

Features

  • High efficiency 91% and low power dissipation
  • 150% peak load capability
  • Built-in active PFC function, PF>0.93
  • Protections: Short circuit / Overload / Over voltage / Over temperature
  • Cooling by free air convection
  • Can be installed on DIN rail TS-35/7.5 or 15
  • UL 508 (industrial control equipment) approved
  • BS EN/EN61000-6-2(BS EN/EN50082-2) industrial immunity level
  • Built-in DC OK relay contact
  • 100% full load burn-in test
  • 3 years warranty

Specifications

SDR-120-48Specifications from the official datasheet (2025-06-09 edition)

OUTPUT

DC VOLTAGE
48V
RATED CURRENT
2.5A
CURRENT RANGE
0 ~ 2.5A
RATED POWER
120W
PEAK CURRENT
3.75A
PEAK POWERNote.6
180W (3 sec.)
RIPPLE & NOISE (max.)Note.2
120mVp-p
VOLTAGE ADJ. RANGE
48 ~ 55V
VOLTAGE TOLERANCENote.3
±1.0%
LINE REGULATION
±0.5%
LOAD REGULATION
±1.0%
SETUP, RISE TIME
1500ms, 60ms/230VAC 3000ms, 60ms/115VAC at full load
HOLD UP TIME (Typ.)
20ms/230VAC 20ms/115VAC at full load

INPUT

VOLTAGE RANGENote.7
88 ~ 264VAC 124 ~ 370VDC
FREQUENCY RANGE
47 ~ 63Hz
POWER FACTOR (Typ.)
0.93/230VAC 0.96/115VAC at full load
EFFICIENCY (Typ.)
90.5%
AC CURRENT (Typ.)
1.4A/115VAC 0.7A/230VAC
INRUSH CURRENT (Typ.)
35A/115VAC 70A/230VAC
LEAKAGE CURRENT
<1mA / 240VAC

PROTECTION

OVERLOAD
Normally works within 110 ~ 150% rated output power for more than 3 seconds and then shut down o/p voltage >150% rated power, constant current limiting with auto-recovery within 3 seconds and shut down o/p voltage after 3 seconds
OVER VOLTAGE
56 ~ 65V Protection type : Shut down o/p voltage, re-power on to recover
OVER TEMPERATURE
95℃±5℃ (TSW) detect on heatsink of power switch Protection type : Shut down o/p voltage, recovers automatically after temperature goes down

FUNCTION

DC OK REALY CONTACT RATINGS (max.)
60Vdc/0.3A, 30Vdc/1A, 30Vac/0.5A resistive load

ENVIRONMENT

WORKING TEMP.
-25 ~ +70℃ (Refer to "Derating Curve")
WORKING HUMIDITY
20 ~ 95% RH non-condensing
STORAGE TEMP., HUMIDITY
-40 ~ +85℃, 10 ~ 95% RH
TEMP. COEFFICIENT
±0.03%/℃ (0 ~ 50℃)
VIBRATION
Component:10 ~ 500Hz, 2G 10min./1cycle, 60min. each along X, Y, Z axes; Mounting: Compliance to IEC60068-2-6

SAFETY & EMC

SAFETY STANDARDS
UL508, TUV BS EN/EN62368-1, AS/NZS 62368.1, EAC TP TC 004, BSMI CNS15598-1 approved;(meet BS EN/EN60204-1)
WITHSTAND VOLTAGE
I/P-O/P:3KVAC I/P-FG:2KVAC O/P-FG:0.5KVAC O/P-DC OK:0.5KVAC
ISOLATION RESISTANCE
I/P-O/P, I/P-FG, O/P-FG:>100M Ohms / 500VDC / 25℃/ 70% RH
EMC EMISSION
Compliance to BS EN/EN55032 (CISPR32), BS EN/EN61204-3 Class B, BS EN/EN61000-3-2,-3, EAC TP TC 020, CNS15936 Class B
EMC IMMUNITY
Compliance to BS EN/EN61000-4-2,3,4,5,6,8,11, BS EN/EN55035, BS EN/EN61000-6-2 (BS EN/EN50082-2), BS EN/EN61204-3, heavy industry level, EAC TP TC 020, SEMI F47 approved

OTHERS

MTBF
1764.6K hrs min. Telcordia SR-332 (Bellcore) ; 292.1K hrs min. MIL-HDBK-217F (25℃)
DIMENSION
40*125.2*113.5mm (W*H*D)
PACKING
0.67Kg; 20pcs/14.4Kg/1.0CUFT
Test conditions and notes8
  1. 1. All parameters NOT specially mentioned are measured at 230VAC 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. The power supply is considered a component which will be installed into a final equipment. The final equipment must be re-confirmed that it still meets EMC directives. (as available on https://www.meanwell.com//Upload/PDF/EMI_statement_en.pdf )
  5. 5. Installation clearances : 40mm on top, 20mm on the bottom, 5mm on the left and right side are recommended when loaded permanently with full power. In case the adjacent device is a heat source, 15mm clearance is recommended.
  6. 6. 3 seconds max., please refer to peak loading curves.
  7. 7. Derating may be needed under low input voltage. Please check the derating curve for more details.
  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

SDR-120-48 Mechanical Specification
Mechanical Specification
SDR-120-48 Block Diagram
Block Diagram
SDR-120-48 Derating Curve
Derating Curve

Downloads

FAQ

Can I use the SDR-120-48 for a 48V PLC cabinet or industrial control panel?

It can be used where the control system requires 48V DC and the total load stays within 120W or 2.5A. The DIN rail format and 125.2 x 113.5 x 40.0 mm body also support compact control panel layouts.

Is the SDR-120-48 appropriate for 48V building automation equipment in an enclosure?

Yes, this model is designed for 48V DC output and fits enclosed building automation or control cabinet applications that need up to 2.5A. Its 88-264VAC input range allows use with a broad range of standard AC supply conditions.

Can this 48V DIN rail supply power industrial automation devices that need a slim panel power source?

Yes, if the equipment requires 48V DC and the combined draw does not exceed 120W. The 40.0 mm slim profile helps when DIN rail space is limited in smaller automation cabinets.

Is the SDR-120-48 suitable for open-air locations, or should it stay inside a cabinet?

This unit is better matched to protected indoor control cabinets or enclosures than exposed mounting conditions. Its specified operating range is -25°C to +70°C, and its safety approvals include UL508, TUV BS EN/EN62368-1, AS/NZS 62368.1, EAC TP TC 004 and BSMI CNS15598-1.

What are the main differences between the SDR-120-48 and other SDR series options?

The related SDR-120 models are the SDR-120-12 at 120W, 12V, 10A and the SDR-120-24 at 120W, 24V, 5A, while the SDR-120-48 delivers 120W at 48V, 2.5A (48-55V adjustable). All three share the 88-264VAC input with PFC, DC OK relay contact and 40 x 125.2 x 113.5 mm housing; the 48V model has 90.5% typical efficiency and 120mVp-p ripple, versus 100mVp-p on the 12V and 24V models.

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Mean Well SDR-120-48 Single Output Industrial Power Supply 120W 48V 2.5A - DIN Rail
Mean Well

Mean Well SDR-120-48 Single Output Industrial Power Supply 120W 48V 2.5A - DIN Rail

Log in to see price

SDR-120-48 is the 48V output model of this series: rated current 2.5A, rated power 120W, typical efficiency 90.5%.

Features

  • High efficiency 91% and low power dissipation
  • 150% peak load capability
  • Built-in active PFC function, PF>0.93
  • Protections: Short circuit / Overload / Over voltage / Over temperature
  • Cooling by free air convection
  • Can be installed on DIN rail TS-35/7.5 or 15
  • UL 508 (industrial control equipment) approved
  • BS EN/EN61000-6-2(BS EN/EN50082-2) industrial immunity level
  • Built-in DC OK relay contact
  • 100% full load burn-in test
  • 3 years warranty

Model

  • 75W 48V
  • 120W 48V
  • 240W 48V
  • 480W 48V
  • 480W 48V PFC
  • 960W 48V
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