Panasonic Industry has introduced its new HE-S SC 2a and HE-S SC 2a1b PCB relay series, designed specifically for single-phase EV charging systems and wallbox applications. Notably, the new relays are already fully compliant with the upcoming European short-circuit test requirements under IEC 62955, which will become mandatory in Q4 2028.
The HE-S SC relay family is built as a future-ready switching solution, combining high current capacity with a compact PCB footprint while aligning with evolving safety standards. It supports a short-circuit capability of up to 1.85 kA (Ip) and an I²t rating of 4.5 kA²s, enabling designers to meet upcoming regulatory requirements well in advance.
Targeting single-phase charging applications particularly in markets like the UK and parts of Italy and Spain, the HE-S SC 2a and 2a1b relays can function as the primary switching component.
Each of the two normally open (NO) contacts is capable of handling up to 40A, even at ambient temperatures of up to +70°C, ensuring reliable performance under demanding conditions.
This level of performance is supported by an optimized thermal design, along with a notably low coil holding power of just 400 mW. This helps reduce overall power consumption without compromising switching reliability.
For designs that require contact monitoring, the HE-S SC 2a1b variant includes an additional normally closed (NC) mirror contact that complies with IEC 60947-4-1.
This feedback contact supports low-level switching down to 10 mA at 5 VDC, enabling accurate status monitoring and supporting functional safety and diagnostic needs.
Thanks to its compact design, the relay allows the full switching function to be integrated directly onto the PCB. This eliminates the need for larger external switching components, helping manufacturers reduce system size, simplify assembly, and lower overall material costs in wallbox designs.
Leadership Comment
“As the EV charging market continues to scale rapidly across Europe, reliability, safety and cost-efficient integration are becoming increasingly critical for wallbox manufacturers,” explains Markus Bichler, Head of Product Management Industrial Relays at Panasonic Industry Europe. “With our new HE-S SC relay, we are enabling designers to meet upcoming short-circuit test standard updates well ahead of time, while optimizing system size, energy efficiency and overall performance. This combination supports the development of next-generation single-phase charging solutions that are both future-proof and highly competitive.”
To Know More About Panasonic’s New HE-S SC Relay Family: CLICK HERE
