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Panasonic to Launch the Industry’s Smallest and Lowest Operating Power Level* High-Capacity Power Relays, HE-S Relay

By Business Wire News   

OSAKA, Japan

Panasonic Corporation announced today that it introduces the industry’s smallest* power relays “HE-S Relay”, which have realized one of the industry’s lowest operating powerlevels*. HE-S Relays can safely cut off abnormal currents that may occur when power conditioners for photovoltaic power generation or power storage system, industrial equipment such as elevators, and stationary EV chargers are in operation. They will be available on the market starting in June 2015.

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The Industry's Smallest Power Relays

The Industry’s Smallest Power Relays “HE-S Relay” (Photo: Business Wire)

* As multi-contact, high-capacity relays with a capacity of 35 A or greater. As of June 1, 2015 based on Panasonic research.

Product name   HE-S Relays
Release date June 2015
Price   To be discussed separately based on the quantity

Downsizing, weight reduction, and energy savings are demanded of power conditioners for photovoltaic power generation, storage battery and various industrial equipment systems. The power relays are used for cutting off inverter current safely in case of a failure in these equipment systems and there are growing needs for downsizing and reduced operating power. Panasonic has developed the industry’s smallest* HE-S Relays that employ the mirror contact structure, thus achieving one of the industry’s lowest operating powerlevels*. HE-S Relays will contribute to the downsizing and energy savings of equipment and systems that require high-capacity control, such as power conditioners for photovoltaic power generation or power storage system, elevators, uninterruptible power supply systems (UPSs), and various types of industrial equipment.


1. The industry’s smallest package* can reduce the footprint, contributing to the downsizing of the equipment.

Dimensions: 30 (L) x 36 (W) x 40 (H) mm

2. The coil hold voltage is reduced to approximately 30% of the rating voltage. One of the industry’s lowest operating power levels* contributes to the energy savings of the equipment.

Operating power: 1.88 W (at an ambient temperature of 20°C)
Holding power: 170 mW (at an ambient temperature of 20°C)

3. The adoption of the mirror contact structure (conforming to EN 60947-4-1) facilitates the design of safety circuits.

Welding of contacts can be detected safely.


  • Safe cut-off applications of AC mains electricity in power conditioners for photovoltaic power generation or power storage system
  • Safe cut-off and power control applications in industrial equipment such as elevators and UPSs (uninterruptible power supply systems), as well as stationary EV chargers

Basic specifications

Characteristics   Item   Specifications
Contact Arrangement 2 Form A, 2 Form A 1 Form B
Rating Control capacity   Form A contact 35 A, 277 V AC (resistive load)
Form B contact 1 A, 277 V AC (resistive load); 1 A, 30 V DC (resistive load)
Coil data Nominal operating power 1,880 mW (@20°C)
Holding power 170 mW (@20°C, when coil hold voltage is 30% of nominal coil voltage)
Electrical characteristics Electric life (resistive load) Form A contact Long life type: Min. 5 x 104 (35 A, 277 V AC)

(ON : OFF = 1 s : 9 s)

Standard type: Min. 3 x 104 (35 A, 277 V AC)

(ON : OFF = 1 s : 9 s)

Form B contact Min. 1 x105 (1 A, 277 V AC, 30 V DC) (ON : OFF = 1 s : 9 s)
Conditions Conditions for operation, transport and storage Ambient temperature: -40 to +55°C (Coil hold voltage is 30% to 110% of nominal coil voltage)
Ambient temperature: -40 to +85°C (Coil hold voltage is 30% to 60% of nominal coil voltage, and during transport or storage)
Humidity: 5 to 85% R.H. (Not freezing and condensing)
External form Dimensions 30 (L) x 36 (W) x 40 (H) mm
  Unit weight   64 g

– Form B contact, only the 2 Form A 1Form B type applies


Product inquires:

About Panasonic
Panasonic Corporation is a worldwide leader in the development of diverse electronics technologies and solutions for customers in the consumer electronics, housing, automotive, enterprise solutions and device industries. Since its founding in 1918, the company has expanded globally and now operates 468 subsidiaries and 94 associated companies worldwide, recording consolidated net sales of 7.715 trillion yen for the year ended March 31, 2015. Committed to pursuing new value through innovation across divisional lines, the company uses its technologies to create a better life and a better world for its customers. To learn more about Panasonic:

Media Contacts:
Public Relations Department
Panasonic Corporation
Tel: +81-(0)3-3574-5664Fax: +81-(0)3-3574-5699
Panasonic News Bureau
Tel: +81-(0)3-3542-6205Fax: +81-(0)3-3542-9018


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