5W Ultra-Compact PCB Mount AC-DC Encapsulated Power Module

BUC05 Series

5W Board Mount AC to DC Industrial, ITE Grade Power Conversion (Module)-Optimal Power Solution for Temperature-Sensitive and Space-Constrained End Equipment

The ARCH BUC05 Series is a compact 5W AC-DC power module designed to address key challenges in low-power system design, including limited PCB space, cost pressure, and global power compatibility. Featuring a wide input range of 85–305VAC, it enables engineers to develop a single design for worldwide deployment, reducing redesign effort across different regions.

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Design Optimization for Cost and Space

In practical applications, engineers often face trade-offs between size, efficiency, and cost. The BUC05 Series addresses these challenges with its ultra-compact 1” x 1” form factor, stable output performance, and integrated protection architecture. With clearly defined recommended application circuits, it helps simplify system design and supports compliance with safety and EMC requirements.

Reliable Operation in Harsh Environments

Designed for real-world operating conditions, BUC05 supports a wide temperature range from -40°C to +85°C and operates at altitudes up to 5000 meters. This ensures stable performance in demanding industrial and outdoor applications.

Efficient and Practical for Modern Applications

The ARCH BUC05 5W AC-DC power module with low no-load power consumption and a compact design, the BUC05 Series is well suited for embedded systems, industrial control boards, smart devices, and IoT applications where space and energy efficiency are key considerations.Compliant with UL / IEC / EN 62368-1 safety standards, BUC05 supports safe integration into end equipment and helps streamline certification processes for global markets. This reduces development risk and shortens time-to-market, especially for products requiring regulatory approval.Combined with its wide input capability and robust operating range, BUC05 provides a practical and dependable power solution for modern electronic designs.

Key Features

Ultra Compact 1 inch size Power Module for PCB Mountable
Cost optimized design
Universal Input Range 90-305VAC
Low No-Load Power Consumption < 0.25W
Cooling by free air convection
Wide Operating Temperature: -40°C~+85°C with derating
Operating altitude 5000m (UL / IEC / EN 62368-1)
I/O Isolation: 4000VAC
Safety Approval to UL / IEC / EN 62368-1
3-Year Product Warranty

Applications

Smart Meter (Electricity, Water, Gas Metering Systems)
IoT Devices (Smart Sensors, Monitoring Systems, Edge Devices)
Embedded Systems (Industrial Control Boards, Interface Modules)
Industrial Automation (Sensor Modules, Control Units)
Energy Monitoring and Power Management Devices

Specification

Output Power (Watt)	5
Dimensions (L x W x H) (Tolerance ± 0.5 mm)	25.4 x 25.4 x 17.6 mm 1.0 x 1.0 x 0.693 inches
AC Input Voltage Range	85-305 VAC or 120-430 VDC
AC Inrush Current	60 A max. (115 VAC) / 130 A max. (230 VAC)
Leakage Current	0.5 mA
Output Voltage Accuracy	± 3%
Ripple and Noise (Vp-p.) (max.)	5S: 100mV ; 12S, 15S: 120mV ; 24S: 150mV
Over Current Protection	Hiccup Technique, Auto-Recovery
Short Circuit Protection	Hiccup Mode (Automatic Recovery)
Isolation (Input-Output)	4000 VAC
Operating Temperature	-40°C ~ +85°C
Temperature Coefficient	± 0.03%/°C
Safety Approval	UL / IEC / EN 62368-1
EMI	EN 55032 Class B
EMS	EN 55035