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Snap-action switches, S840
Snap-action switches, S840 with positive opening operation and wiping contacts  - SCHALTBAU GMBH

Description

One feature of snap action elements is the switching speed independent of the actuation speed. This indirect switching operation is achieved by a snap mechanism allowing a defined switching action. In such a way the S840 is excellently suited for low actuation speeds, e.g. in motors or spindle limit switches. The S840 is provided with a positive opening mechanism. Even after a short circuit, the welded contact opens. For this reason the snap action switch is built into safety circuits. Features: - Positive opening operation: Reliable interruption even in case of contact welding, in compliance with IEC 60947-5-1, Annex K - Single break contacts: Changeover with single break contacts. Also available with NC or NO contacts. Compact design. - Self-cleaning contacts: Constantly low contact resistance ensures high contact reliability over the entire design life of the switch - Sealed to: IP40 in accordance with IEC 60529 - Contact material: Silver or gold

Switches

Product features

Contact configuration SPDT (Form C) snap-action switch with 3 terminals, positive opening operation, and wiping action
Conv. thermal current Ith EN60947 6 A at T = 85°C
Rated insulation voltage Ui EN60947 250 V
Pollution degree IEC 60947 PD 3
Rated impulse withstand voltage Uimp 2.5 kV

Additional product literature

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