Panasonic HE-S SC-Type Power Relays

Introduction

Panasonic Industry HE-S SC-Type power relays are compact, PCB-mountable switching components designed for demanding high-current power control applications. Available in several variants, including AHES3591, AHES3592, AHES4591, and AHES4592, these relays combine 40 A switching capability with support for systems operating up to 480 VAC.

Part Description

The HE-S SC-Type series is a power relay family intended for reliable control and isolation of high-voltage AC loads. Its compact package helps designers build space-conscious power control boards while maintaining substantial switching performance.

Key characteristics include:

• Up to 40 A switching capacity
• Operation at voltages up to 480 VAC
• PCB-mountable construction
• 2 Form A or 2 Form A + 1 Form B contact configurations
• 12 VDC or 24 VDC coil options
• Mirror-contact monitoring capability
• Low 400 mW holding power
• Designed for high-power switching and control circuits

The 2 Form A contact arrangement supports normally open switching channels, while versions with 2 Form A and 1 Form B contacts provide an additional normally closed auxiliary contact. Mirror-contact functionality can support status feedback and safety-oriented monitoring designs.

Applications

Potential applications for Panasonic HE-S SC-Type power relays include:

• Electric vehicle charging stations
• EV charging cable and connector control equipment
• Solar inverter systems
• Renewable-energy power conversion equipment
• Energy storage systems
• Industrial power distribution panels
• Motor control and switching units
• HVAC power control boards
• Smart-grid equipment
• Commercial charging infrastructure
• High-current AC load switching
• Safety monitoring and interlock circuits

Industries

These power relays can be used across a range of industries, including:

• Electric vehicle infrastructure
• Renewable energy
• Energy storage
• Industrial automation
• Power generation and distribution
• Building automation
• HVAC and refrigeration
• Transportation equipment
• Commercial facilities management
• Electrical equipment manufacturing

Usage Ideas

1. EV Charger Contactor Board
   Build a PCB-based switching board that connects or disconnects AC power to an EV charging output while using the relay’s auxiliary contact for status monitoring.

2. Solar Inverter AC Disconnect Module
   Use the relay to control the connection between a solar inverter and an AC load or grid interface, incorporating feedback contacts for system diagnostics.

3. Industrial Load Control Panel
   Design a compact controller for heaters, pumps, or other high-current AC loads, using a 12 VDC or 24 VDC control supply and relay feedback for safety interlocks.

Conclusion

Panasonic HE-S SC-Type power relays provide a practical high-current switching solution for compact PCB-based designs. With 40 A capability, support for up to 480 VAC, multiple contact configurations, low holding power, and mirror-contact monitoring, they are well suited to EV charging, renewable-energy systems, industrial equipment, and other power control applications.