Step-down converter WP12-40C

buckDIN railprinted circuit

Overview
The WP12-40C is a DC-DC converter module that delivers a regulated 12V DC output at 40W from a 9–36V DC input. Designed for industrial, automotive, telecommunications and renewable energy systems, it is available in board-mount, chassis-mount and DIN-rail-mount variants and supports operation at altitude and in variable supply environments.

Key features

• Wide input voltage range: 9–36V DC
• Output: 12V DC, 3.3A (40W)
• High-frequency ZVS topology for sustained efficiency
• Low inrush current to reduce startup stress
• Protections: OCP, OVP, short-circuit with automatic recovery

Certifications

• CE
• FCC

Applications
Suitable for renewable energy installations (solar, wind), EV charging equipment, embedded systems, industrial controls and telecommunications where stable 12V rails are required from variable DC sources. Available mechanical options allow integration in enclosures, on PCBs or on DIN rails.

Product details
The WP12-40C uses zero-voltage switching (ZVS) at high frequency to maintain up to 90% efficiency across the input range and limit thermal stress. It provides consistent short-circuit protection with automatic recovery and is specified for operation at altitudes up to 10,000 ft. Modular form factors facilitate system-level power distribution from unregulated sources to point-of-load converters.

Technical specifications

• Input voltage: 9V to 36V DC
• Output: 12V DC
• Load rating: 3.3A (12V)
• Power rating: 40W
• Ripple & noise: < 120 mV
• Line regulation: < ±1% (rated input)
• Load regulation: < ±5%
• Efficiency: up to 90% (full load)
• Protections: OCP, OVP, short-circuit auto-recovery
• Operating humidity: 10%–90% RH, non-condensing
• Operating temperature: 0°C to 50°C (series spec may indicate −20°C to +70°C for some variants)
• Storage temperature: −20°C to 70°C
• Altitude: 0 to 10,000 ft
• Dimensions: 90 x 35 x 18.6 mm