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Mean Well MSP-450-48 Power Supply 456W 48V 9.5A

Name: Mean Well MSP-450-48 Power Supply 456W 48V 9.5A
Brand: Mean Well
SKU: MSP-450-48
Price: 188.46 USD
Availability: InStock

built-in active PFCmedical safety approvedhigh efficiencyno load power consumption < 0.5~0.8W

SKU MSP-450-48

$188.46 USD

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Select model — 6 in this family

MSP-450-48

MSP-100-48 100W 48V Backorder$62.05 USD

MSP-200-48 200W 48V Backorder$100.89 USD

MSP-300-48 300W 48V Backorder$138.78 USD

MSP-450-48 450W 48V In stock$188.46 USD

MSP-600-48 600W 48V Low stock$210.75 USD

MSP-1000-48 1000W 48V In stock$259.39 USD

Product variants

In stock

Overview

MSP-450-48 is the 48V output model of this series: rated current 9.5A, rated power 456W, typical efficiency 89.5%.

Features

Universal AC input / Full range
Built-in active PFC function, PF>0.95
High efficiency up to 89.5%
Withstand 300VAC surge input for 5 seconds
Protections: Short circuit / Overload / Over voltage / Over temperature
Built-in constant current limiting circuit
Medical safety approved (MOOP level)
Built-in cooling Fan ON-OFF control
Built-in DC OK signal
Built-in remote ON-OFF control
Stand by 5V@0.3A
Built-in remote sense function
No load power consumption<0.6W (Note.6)
5 years warranty

Specifications

MSP-450-48Specifications from the official datasheet (2025-12-05 edition)

OUTPUT

DC VOLTAGE: 48V
RATED CURRENT: 9.5A
CURRENT RANGE: 0 ~ 9.5A
RATED POWER: 456W
RIPPLE & NOISE (max.)^Note.2: 240mVp-p
VOLTAGE ADJ. RANGE: 40.8 ~ 55.2V
VOLTAGE TOLERANCE^Note.3: ±1.0%
LINE REGULATION: ±0.2%
LOAD REGULATION: ±0.5%
SETUP, RISE TIME: 1000ms, 100ms/230VAC 2500ms, 100ms/115VAC at full load
HOLD UP TIME (Typ.): 16ms/230VAC 16ms/115VAC at full load

INPUT

VOLTAGE RANGE^Note.4: 85 ~ 264VAC 120 ~ 370VDC
FREQUENCY RANGE: 47 ~ 63Hz
POWER FACTOR (Typ.): PF>0.95/230VAC PF>0.99/115VAC at full load
EFFICIENCY (Typ.): 89.5%
AC CURRENT (Typ.): 5A/115VAC 2.4A/230VAC
INRUSH CURRENT (Typ.): 35A/115VAC 70A/230VAC
LEAKAGE CURRENT: Earth leakage current < 300μA/264VAC , Touch leakage current < 100μA/264VAC

PROTECTION

OVERLOAD: 105 ~ 135% rated output power Protection type : Constant current limiting, recovers automatically after fault condition is removed
OVER VOLTAGE: 57.6 ~ 67.2V Protection type : Shut down o/p voltage, re-power on to recover
OVER TEMPERATURE: Shut down o/p voltage, recovers automatically after temperature goes down

FUNCTION

5V STANDBY: 5VSB : 5V@0.3A ; tolerance±5%, ripple : 50mVp-p(max.)
DC OK SIGNAL: PSU turn on : 3.3 ~ 5.6V ; PSU turn off : 0 ~ 1V
REMOTE CONTROL: RC+ / RC-: 4 ~ 10V or open = power on ; 0 ~ 0.8V or short = power off
FAN CONTROL (Typ.): Load 20±10% or RTH2≧50℃ Fan on

ENVIRONMENT

WORKING TEMP.: -40 ~ +70℃ (Refer to "Derating Curve")
WORKING HUMIDITY: 20 ~ 90% RH non-condensing
STORAGE TEMP., HUMIDITY: -40 ~ +85℃, 10 ~ 95% RH non-condensing
TEMP. COEFFICIENT: ±0.03%/℃ (0 ~ 50℃)
VIBRATION: 10 ~ 500Hz, 5G 10min./1cycle, 60min. each along X, Y, Z axes

SAFETY & EMC

SAFETY STANDARDS: IEC 60601-1:2005+A1+A2, ANSI/AAMI ES60601-1:2005+A2, CAN/CSA C22.2 No. 60601-1:2014+A2 EAC TP TC 004 approved;Design refer to BS EN/EN60335-1, BS EN/EN 62368-1(by request)
ISOLATION LEVEL: Primary-Secondary: 2×MOOP, Primary-Earth: 1×MOOP, Secondary-Earth: 1×MOOP
WITHSTAND VOLTAGE: I/P-O/P:4KVAC I/P-FG:2KVAC O/P-FG: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/EN55011 (CISPR11) Class B, BS EN/ EN61000-3-2,-3, EAC TP TC 020
EMC IMMUNITY: Compliance to BS EN/ EN61000-4-2,3,4,5,6,8,11, BS EN/ EN60601-1-2 , EAC TP TC 020

OTHERS

MTBF: 159.3K hrs min. MIL-HDBK-217F (25℃)
DIMENSION: 218*105*41mm (L*W*H)
PACKING: 1.19Kg; 12pcs/15.3Kg/0.81CUFT

Test conditions and notes9

1. All parameters NOT specially mentioned are measured at 230VAC input, rated load and 25℃ of ambient temperature.
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. Tolerance : includes set up tolerance, line regulation and load regulation.
4. Derating may be needed under low input voltages. Please check the derating curve for more details.
5. Length of set up time is measured at first cold start. Turning ON/OFF the power supply may lead to increase of the set up time.
6. No load power consumption<0.5W when RC- & RC+ (CN100 pin1,2) 0 ~ 0.8V or short.
7. When the input voltage is less than 40VAC, the SPS may exhibit degradation of performance. The final product manufacturers must re-confirm this deviation that does not affect basic safety or essential performance.
8. 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 360mm*360mm 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 )
9. 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

MSP-450-48 Mechanical Specification — Mechanical Specification

MSP-450-48 Block Diagram — Block Diagram

MSP-450-48 Derating Curve — Derating Curve

MSP-450-48 Function Manual — Function Manual

Downloads

Datasheet1

MSP-450-48 datasheetMSP-450-SPEC.PDF · 2025-12-05 edition PDF Download

Certificates3

UL Certificate(MSP-450)(EN) PDF Download

CB Certificate(MSP-450)(EN) PDF Download

EMC Certificate(MSP-450)(EN) PDF Download

Test reports1

Test Report(MSP-450-48)(EN) PDF Download

Catalogues1

Mean Well Catalog (Industrial) PDF Download

FAQ

Can I use the MSP-450-48 for 48V telecom or network power applications?

Yes, this model provides a constant 48V output at up to 9.5A and 456W. That specification is aligned with equipment designed for a regulated 48V DC supply in telecom or network environments.

Is the MSP-450-48 appropriate for 48V industrial control systems?

It is a fit for industrial control systems that require a constant voltage 48V rail and stay within 456W total load. The 9.5A output supports moderate-to-high power 48V equipment on a single supply.

Would the MSP-450-48 work for embedded or communications racks that run on 48V DC?

Yes, it can suit embedded or communications hardware built for 48V DC input, with available output up to 9.5A. The wide 85-264VAC input range also helps when the same platform is used in different regions.

Can this 48V power supply be used for centralized DC distribution in automation equipment?

It can be used where the downstream equipment is designed for 48V constant voltage distribution and the total demand remains within 456W. Its regulated 48V output is intended for fixed-voltage DC loads rather than lower-voltage rails.

Is the MSP-450-48 rated for outdoor service?

The unit is specified for operation from -40°C to +70°C, with output derating at higher ambient temperatures per the derating curve. However, no IP rating is listed in the provided specs, so the product data does not identify it as outdoor-rated.

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Mean Well MSP-450-48 Power Supply 456W 48V 9.5A

Select model — 6 in this family

Overview

Features

Specifications

OUTPUT

INPUT

PROTECTION

FUNCTION

ENVIRONMENT

SAFETY & EMC

OTHERS

Technical drawings

Downloads

Datasheet1

Certificates3

Test reports1

Catalogues1

FAQ

Payment & Security

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Mean Well MSP-450-48 Power Supply 456W 48V 9.5A

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