120W Open Frame Chassis Mount AC-DC Switching Power Supply with High Isolation

BQF120 Series

120W AC to DC Industrial and ITE Switching Power Supply - Compact, Energy-Efficient Power Solution for Cost-Sensitive Applications

ARCH BQF120 Series is a 120W high power density open-frame AC-DC power supply designed for industrial automation and embedded equipment. With a compact 3" × 2" footprint, it delivers a full 120W output under natural convection and supports 150W peak power (125%) for up to 10 seconds, making it ideal for applications with high startup current requirements.

Featuring a universal 90–264VAC input, 4000VAC reinforced isolation, an operating temperature range of -40°C to +85°C, and reliable operation at altitudes up to 5,000 meters, the BQF120 is built for demanding industrial environments. It complies with UL / IEC / EN 62368-1, EN 55032 Class B, and EN 55035, while providing up to 93% efficiency, low leakage current, and comprehensive protection functions for safe and reliable operation.

The BQF120 Series is ideally suited for industrial automation, industrial control, industrial PCs (IPC), PLCs, HMI, networking and communication equipment, test and measurement instruments, embedded control systems, and factory automation equipment.

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High Power Density Design for Space-Constrained Application

The BQF120 Series features a compact 3" × 2" industry-standard footprint, delivering a full 120W output under natural convection without sacrificing performance. Its high power density design enables equipment manufacturers to reduce system size while maximizing installation flexibility. The compact form factor makes it an ideal solution for industrial PCs (IPC), PLCs, embedded control systems, HMI, and other space-limited industrial equipment.

125% Peak Load Capability for High Inrush Current Applications

The BQF120 supports 125% peak power (150W for up to 10 seconds), providing additional output capacity during equipment startup or transient load conditions. This feature helps accommodate high inrush current generated by motors, solenoids, relays, and industrial control devices, minimizing voltage drop and preventing unexpected system resets while reducing the need to oversize the power supply

Wide Operating Temperature and High Altitude Performance

Designed for demanding industrial environments, the BQF120 operates reliably over a wide temperature range of -40°C to +85°C and supports operation at altitudes up to 5,000 meters. Its robust thermal performance ensures stable operation in harsh conditions, making it suitable for factory automation, industrial control systems, outdoor equipment, and other mission-critical industrial applications.

High Efficiency with Reinforced Isolation for Reliable Operation

The BQF120 achieves up to 93% efficiency, helping reduce power loss, improve thermal performance, and increase overall system reliability. With 4000VAC reinforced input-to-output isolation and compliance with UL / IEC / EN 62368-1, the series provides enhanced electrical safety. Comprehensive protection features, including short circuit, over-voltage, and over-power protection, ensure reliable long-term operation in industrial applications

Industrial-Grade EMC Compliance for Easy System Integration

The BQF120 complies with EN 55032 Class B EMI and EN 55035 EMS standards, delivering excellent electromagnetic compatibility and immunity performance. This helps simplify system-level EMC certification, reduce design complexity, and shorten product development cycles. It is particularly well suited for industrial control equipment, networking and communication systems, industrial PCs, and test & measurement instruments where EMC performance is critical.

Key Features

120W High Power Density Open Frame AC-DC Power Supply
Compact 3" × 2" Industry-Standard Design
Full 120W Output with Natural Convection
125% Peak Load (150W for 10 Seconds)
Universal 90–264VAC Input
High Efficiency up to 93%
4000VAC Reinforced Isolation
Wide Operating Temperature: -40°C to +85°C
Operating Altitude up to 5,000m
Low Leakage Current 0.15 mA Max.
Low No-Load Power Consumption (<0.5W)
EN 55032 Class B EMI & EN 55035 EMS Compliant
Comprehensive Protection: SCP / OVP / OPP
UL / IEC / EN 62368-1 Certified
3-Year Warranty

Applications

Industrial Automation Equipment
Industrial Control Equipment
Industrial PCs (IPC)
Test & Measurement Equipment
Networking & Communication Equipment
Embedded Control Systems
POS & Self-Service Kiosk Systems
Factory Automation Equipment
Electronic Manufacturing Equipment

Specification

Model	BQF120
Dimensions (L × W × H) (Tolerance ±0.5 mm)	76.2 × 50.8 × 33.0 mm 3.0 × 2.0 × 1.3 inches
Cooling Method	Free Air Convection
AC Input Voltage Range	90-264 VAC
AC Inrush Current	30A Max. (115VAC) / 70A Max. (230VAC)
Leakage Current	0.15mA Max. / 240VAC
Output Voltage Accuracy	±2%
Output Voltage Adjustment Range	12S: 11.4~12.5V Output; 24S: 23~25.2V Output; 48S: 47~50.4V Output
Ripple & Noise (Vp-p)	12V: 100mV Max. 24V: 150mV Max. 48V: 200mV Max.
Over Power Protection	Auto Recovery
Over Voltage Protection	Zener Diode Clamp
Short Circuit Protection	Hiccup Mode (Auto Recovery)
Input to Output Isolation	4000 VAC
Operating Temperature	-40°C to +85°C (with Derating)
Temperature Coefficient	±0.03%/°C
Safety Standards	UL / IEC / EN 62368-1
EMI	Conducted Emission: FCC Part 15 (ANSI C63.4) / EN 55032 Class B Radiated Emission: FCC Part 15 (ANSI C63.4) / EN 55032 Class B
EMS	EN 55035