LF-G relay for the solar market

The LF-G relay was specially designed to fulfil the requirements on safe disconnection and one fault safety demanded from IEC 62109.

The LF-G relay’s success in the solar market results from high switching performance (up to 33A/250VAC), compact size, low coil holding power, and attractive pricing. The standard for solar inverters IEC 62109 prescribes wider contact gaps depending on the input voltage on the DC side, which is 1000VDC in most installations. For this input voltage, IEC 62109 defines a contact gap of at least 1.8mm on the AC side, compared to 1.5mm in the past (VDE 0126).

Hence, the contact gap for both, the LFG1 (22A/250VAC) and LFG2 (33A/250VAC) relays, has been increased to 1.8mm. The new types have the same certifications as standard LF-G relays, and pinning and coil power remain the same, allowing customers to easily exchange relays if necessary.

Datasheet