Mean Well UHP-1500-24 — 24VDC 1500W Conduction-Cooled PFC Switching Supply | 62.5 A | 96% Efficiency | Fanless −30 to +70°C

Overview The Mean Well UHP-1500-24 is a 1500W single-output AC-DC switching power supply designed for demanding industrial environments where space, thermal management, and reliability are all constrained. Its defining characteristic is the 41mm slim profile combined with a fully fanless, conduction-cooled thermal design — the unit transfers heat through its baseplate to a mounting surface or aluminum enclosure rather than relying on internal airflow. This makes it suitable for sealed enclosures, dust-laden environments, and vibration-intensive platforms where a fan would be a liability. The supply operates across the full universal input range (90–264VAC / 47–63Hz) with active PFC (≥0.95 at 230VAC, ≥0.99 at 115VAC) and achieves up to 96% typical efficiency at 24V output. The output voltage is adjustable from 24V to 28.8V via the built-in potentiometer, and both output voltage and constant-current limit are remotely programmable via an analog control signal (0.4–4.7VDC), making it well suited to charging profiles, variable-load testing rigs, and voltage-margining applications. The unit includes built-in remote ON/OFF control, a DC-OK TTL signal, and a 12V/0.4A auxiliary output — all accessible from a single 12-pin connector (CN71). Protection coverage includes short circuit (auto-recover after 5 seconds), overload via constant current limiting with shutdown, over voltage, and over temperature with automatic recovery. The UHP-1500-24 is rated for operation from −30°C to +70°C under convection cooling (with derating above 50°C) and carries certifications for UL62368-1, BS EN/EN62368-1, EAC TP TC 004, and CB. An optional PMBus or CANBus communication interface (UHP-1500-24PM / UHP-1500-24CAN) is available by request for applications requiring digital monitoring, trimming, or supervisory control. Target applications include industrial automation machinery, laser systems, charging equipment, electronic test and measurement instruments, mechanical and electrical equipment, and Power Sourcing Equipment (PoE) infrastructure where a 48V model would be selected instead. Key Specifications Identification Parameter Value Manufacturer Mean Well Model UHP-1500-24 Type AC-DC single-output PFC switching supply, conduction-cooled Rated power 1500W (1512W peak) Input Parameter Value Voltage range 90–264VAC / 250–370VDC Frequency 47–63Hz AC current (typical) 11A @ 115VAC / 8A @ 230VAC Inrush current (typical) 30A @ 115VAC / 60A @ 230VAC (cold start) Power factor (typical) ≥0.99 @ 115VAC full load / ≥0.95 @ 230VAC full load Leakage current <0.75mA @ 240VAC Output Parameter Value Nominal output voltage 24VDC Voltage adjustment range 24.0–28.8V (via SVR potentiometer) Output voltage programmable (PV) 50–120% of nominal (via external 0.4–4.7VDC signal) Rated output current 62.5A Output current programmable (PC) 20–100% of rated current (via external 0.4–4.7VDC signal) Ripple & noise (max) 240mVp-p Line regulation ±0.5% Load regulation ±0.5% Voltage tolerance ±1.0% Setup / rise time 1800ms / 60ms @ 230VAC full load Hold-up time (typical) 16ms @ 230VAC 75% load / 10ms @ 230VAC full load Efficiency & Switching Parameter Value Efficiency (typical) 95% @ 115VAC / 96% @ 230VAC PFC switching frequency 70kHz PWM switching frequency 55kHz Protection Parameter Value Short circuit Constant current limiting; shutdown after 5 sec; re-power on to recover Overload 105–125% rated current; constant current → shutdown after 5 sec; re-power on to recover Over voltage 30–35V; shutdown; re-power on to recover Over temperature Shutdown; auto-recover when temperature falls Functions Parameter Value Remote ON/OFF Dry contact to 12V-AUX pin; short = ON, open = OFF DC-OK signal TTL output; 4.4–5.5V when Vout ≥ 80%; −0.5–0.5V when Vout ≤ 80% Auxiliary output 12V @ 0.4A (±10%); not controlled by remote ON/OFF Communication (optional) PMBus Rev. 1.1 (max 100kHz) or CANBus — by request LED indicator Power ON indicator Mechanical Parameter Value Dimensions (L × W × H) 290 × 140 × 41mm Weight 2.51kg Cooling method Conduction cooling via baseplate; convection or forced air with mounting plate Environmental Parameter Value Operating temperature −30°C to +70°C (see derating curve) Operating humidity 20–90% RH non-condensing Storage temperature / humidity −40°C to +85°C / 10–95% RH non-condensing Temperature coefficient ±0.03%/°C (0–50°C) Vibration 10–500Hz, 5G, 10 min/cycle, 60 min per axis (X, Y, Z) Operating altitude Up to 5000m Isolation & Withstand Parameter Value Withstand voltage I/P–O/P: 3.75kVAC; I/P–FG: 2kVAC; O/P–FG: 1.25kVAC Isolation resistance 100MΩ min @ 500VDC / 25°C / 70% RH Reliability Parameter Value MTBF 535,400 hrs min (Telcordia SR-332) / 56,700 hrs min (MIL-HDBK-217F @ 25°C) Warranty 5 years Certifications Parameter Value Safety UL62368-1, DEKRA BS EN/EN62368-1, EAC TP TC 004 (CB scheme) EMC emissions BS EN/EN55032 (CISPR32) Class B conducted, Class A radiated; EN61000-3-2/-3-3 EMC immunity BS EN/EN55035, EN61000-6-2; ESD Level 2/3, EFT Level 3, Surge 2kV/4kV CN71 Control Connector Pin Assignment Connector: HRS DF11-12DP-2DS (or equivalent). Mating housing: HRS DF11-12DS. Terminals: HRS DF11-**SC. Pin Function Description 1 PV Output voltage programming input (non-isolated; ref to GND-signal) 2 PC Constant current level programming input (non-isolated; ref to GND-signal) 3, 4 GND-signal Signal ground; negative output voltage reference 5 Remote ON/OFF Short to 12V-AUX = ON; open (0–0.5V) = OFF; max input 13.2V 6 DC-OK TTL output; High (4.4–5.5V) when Vout ≥ 80%; Low (−0.5–0.5V) when Vout ≤ 80%; max source 10mA 7, 8 +12V-AUX Auxiliary 12V output (10.6–13.2V); max 0.4A; isolated from output terminals; always on 9, 10 GND-AUX Auxiliary ground; isolated from +V / −V output terminals 11 SDA / CANH PMBus serial data (PM model) / CANBus high (CAN model); isolated 12 SCL / CANL PMBus serial clock (PM model) / CANBus low (CAN model); isolated Integration Notes Conduction cooling requires secure mechanical contact between the unit baseplate and a thermally conductive mounting surface. Mean Well recommends a 450 × 450mm aluminum plate (minimum) with a smooth or thermal-grease-coated surface; the unit must be centered on the plate. For forced-air applications, a 200mm fan delivering ≥40CFM directed across the fins allows full rated load at elevated ambient temperatures — consult the forced-air derating curve. Output voltage derating begins at approximately 50°C case temperature; above T2 (T1 + 5°C) the over-temperature protection will trigger auto shut-down. Monitor the DC-OK signal or case temperature in high-ambient installations. The PV and PC programming inputs are non-isolated and referenced to GND-signal (pins 3/4), which is tied to the negative output rail. Keep these signal leads short and away from power wiring to avoid noise coupling. The 12V-AUX output (pins 7/8) is not controlled by the Remote ON/OFF pin — it remains live whenever AC input is present. Account for this in safety-critical interlock designs. Inrush current at cold start is 60A @ 230VAC. Size upstream fusing and inrush-limiting NTCs accordingly; do not use standard slow-blow fuses rated below this peak. PMBus and CANBus variants (UHP-1500-24PM, UHP-1500-24CAN) are available by request; address selection is via the on-board DIP switch (A0/A1/A2). Confirm lead time before specifying these variants in production. The unit complies with EN61000-3-2 harmonic current limits — no external power factor correction hardware is required. MTBF is published at two standards (Telcordia SR-332 and MIL-HDBK-217F). Use the MIL-HDBK figure (56,700 hrs @ 25°C) for conservative qualification calculations.