MEAN WELL Power Supply NDR-240 Series Single Output DIN Rail Mounted

Product Item : NDR-240 series
Category：DIN Rail Power Supplies
Wattage: 240W
Input Voltage: 90 ~ 264VAC 127 ~ 370VDC [DC input operation possible by connecting AC/L(+), AC/N(-)]
Output Current: 0 ~ 10A
Output Voltage: 24 ~ 48V
Product description：NDR-240 is one economical slim 240W DIN rail power supply series, adapt to be installed on TS-35/7.5 or TS-35/15 mounting rails.
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NDR-240 Series - 240W DIN Rail Power Supply with Active PFC

✓ In Stock3-Year WarrantyActive PFC28ms Hold-upBIS + KC + BSMI

				Key Performance at a Glance
			
						240W
					
						Rated Power
					
						90%
					
						Max Efficiency
					
						PF>0.98
					
						Power Factor
					
						28ms
					
						Hold-up (230V)
					
						<1mA
					
						Leakage Current
					
						2
					
						Output Models

Product Overview

The NDR-240 series is MEAN WELL's 240W high-power DIN rail power supply with Active PFC - the first NDR model to incorporate power factor correction. With PF>0.98 and 28ms hold-up time, it represents a significant upgrade in performance and global certifications including BIS (India), KC (Korea), and BSMI (Taiwan).

Designed for TS-35/7.5 and TS-35/15 DIN rail mounting, the NDR-240 delivers 240W from 90~264VAC universal input through a built-in Active PFC circuit. This enables full EN61000-3-2 harmonic compliance at a 240W power level where passive solutions would not suffice. Two output voltages are offered: 24V and 48V - both delivering full 240W continuously.

Measuring 63x125.2x113.5mm, the NDR-240 is wider than the NDR-120 (63mm vs 40mm) to accommodate the PFC stage and higher power components. The metal housing with 70KHz PFC+PWM switching enables fanless operation from -20C to +70C. Both models include a DC OK LED on the front panel for immediate output verification. 28ms hold-up at 230V (22ms at 115V) bridges nearly two complete AC cycles.

UL508, TUV BS EN/EN62368-1, BSMI CNS14336-1, EAC TP TC 004, BIS IS13252, KC K60950-1 (48V only) certified. Class B EMC with EN61000-6-2 heavy industrial immunity. <1mA leakage. 3-year warranty. Note: no 12V output - for 12V DIN rail applications, see NDR-120 or NDR-75 series.

Product Images

Technical Specifications

Parameter	NDR-240-24	NDR-240-48
DC Output Voltage	24V	48V
Rated Current	10A	5A
Rated Power	240W	240W
Ripple & Noise (max)	150mVp-p	150mVp-p
Voltage Adjustment Range	24~28V	48~55V
Voltage Accuracy	+/-1.0%	+/-1.0%
Line Regulation	+/-0.5%	+/-0.5%
Load Regulation	+/-1.0%	+/-1.0%
Efficiency (Typ.)	88.5%	90%

Input, Protection & Features (All Models)

Input Voltage	90~264VAC universal; 127~370VDC. Active PFC: PF>0.98/115V, PF>0.95/230V at full load. 47~63Hz
AC Current / Inrush	2.5A/115VAC, 1.3A/230VAC; Inrush 20A/115V, 35A/230V cold start
Leakage / Hold-up	<1mA / 240VAC; Hold-up 28ms/230VAC, 22ms/115VAC (full load) - best in NDR family
Overload Protection	105~130% rated power; Constant current mode, auto-recovery after fault removal
Overvoltage Protection	24V: 29~33V / 48V: 56~65V. Output shutdown, restart to recover
Over-temperature Protection	Output shutdown, auto-recovery after temperature drops (not restart!)
DC OK Indicator	Green LED on both models (24V and 48V)
Cooling / Frequency	Natural convection (fanless); 70KHz PFC+PWM switching

Environmental, Safety & EMC

Operating Temperature	-20~+70C (fanless; derating applies). Temp coefficient +/-0.03%/C (0~50C). Humidity 20~95% RH
Vibration	10~500Hz, 2G, 10 min/cycle, 60 min each X/Y/Z; Mounting: IEC60068-2-6 compliant
Safety Standards	UL508, TUV BS EN/EN62368-1, BSMI CNS14336-1, EAC TP TC 004, BIS IS13252; KC K60950-1 (48V only)
Withstand / Insulation	I/P-O/P: 3KVAC \| I/P-FG: 2KVAC \| O/P-FG: 0.5KVAC; Insulation: >100Mohm/500VDC
EMC Emissions	EN55032 (CISPR32), EN61204-3 Class B, EN61000-3-2 (harmonic), EN61000-3-3; CNS13438, KSC 9832 (48V)
EMC Immunity	EN61000-4-2,3,4,5,6,8,11, EN55035, EN61000-6-2 Heavy Industrial; KSC 9835 (48V)
MTBF / Dimensions	1,645.2K hrs (Telcordia); 63x125.2x113.5mm (WxHxD); 1kg / 12pcs / 13kg

Key Features

Active PFC — First in NDR
PF>0.98 at 115VAC, EN61000-3-2 compliant. First NDR with full power factor correction - essential at 240W.

28ms Hold-up Time
Best in NDR family (28ms vs 60ms NDR-75, 16ms NDR-120). Nearly 2 AC cycles at 230V.

Global Certifications
UL508 + BIS + KC + BSMI + TUV + EAC. First NDR with BIS (India) and KC (Korea). Ship worldwide.

90% Peak Efficiency
48V model at 90%. 70KHz PFC+PWM dual-stage switching for clean output at high power.

Full 240W at Both Voltages
24V at 10A and 48V at 5A deliver full rated power. No low-voltage derating.

DC OK LED Both Models
Green LED on 24V and 48V. Instant output status at a glance in crowded control cabinets.

OTP Auto-Recovery
Unlike OVP (requires restart), over-temperature protection auto-recovers. Reduces field service calls.

Constant Current Overload
Smooth current limiting for inductive/capacitive loads. Auto-recovery after fault clears.

Heavy Industrial Immunity
EN61000-6-2 heavy industrial EMC. Built for factory floor and semiconductor fab environments.

3-Year Warranty
UL508 + TUV + BIS + KC + BSMI + EAC. 100% burn-in tested. 1,645K hrs MTBF.

Frequently Asked Questions

Why does the NDR-240 have Active PFC while NDR-75/120 don't?

At 240W, Active PFC becomes necessary for EN61000-3-2 harmonic compliance. Below 75W, the standard allows compliance without PFC. At 120W, the harmonic limits can be met through circuit design. At 240W, an active PFC circuit is the only practical way to meet the standard. This is why NDR-240 is the first in the family with PF>0.98.

Why is there no 12V model?

At 240W, a 12V model would require 20A output current - demanding larger components, thicker terminals, and potentially exceeding the practical limits of the 63mm slim form factor. For 12V DIN rail applications, consider the NDR-120-12 (10A/120W) or contact MEAN WELL for higher-power 12V solutions.

What certifications does the NDR-240 have that NDR-120 doesn't?

The NDR-240 adds: (1) BIS IS13252 (India) - required for products sold in India; (2) KC K60950-1 (Korea, 48V only) - Korean safety certification; (3) BSMI CNS14336-1 (Taiwan) - Taiwan ITE safety standard; (4) KC KSC 9832/9835 (Korea, 48V only) - Korean EMC standards. These make the NDR-240 the most globally certified NDR model.

How does the hold-up time compare within the NDR family?

The NDR family hold-up times at 230V are: NDR-75: 60ms (longest, due to lower power and simpler circuitry), NDR-240: 28ms (best balance of active PFC + good ride-through), NDR-120: 16ms (shortest, due to higher power density). The PFC circuit in the NDR-240 provides more bulk capacitance than a non-PFC design at the same power level.

Is the over-temperature protection auto-recovery?

Yes. Unlike the OVP which requires a manual restart, the NDR-240's over-temperature protection automatically recovers once the internal temperature drops below the safe threshold. This is an important field service advantage - a temporary thermal condition (blocked airflow, high ambient) does not require a technician to reset the unit.