Schaltbau Snap-action switches, S820 series

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Schaltbau Snap-action switches, S820 series

Specifications

Electrical Data
Contact configuration	SPDT-DB (Form Za) snap-action switch with 4 terminals, positive opening operation, and 2 galvanically isolated contact bridges
Conv. thermal current I_th EN60947	20 A at T = 85°C
Conv. thermal current I_th UL508	10 A at T = 85°C
Rated insulation voltage U_i EN60947	400 V
Rated insulation voltage U_i UL508	300 V
Pollution degree IEC 60947	PD 3
Pollution degree UL508	PD 3
Rated impulse withstand voltage U_imp	4 kV
Utilization category IEC 60947	AC-15, 230 VAC/5.0 A / DC-13, 110 VDC/1.0 A
Utilization category UL508	240 V AC/1.5 A / DC 120 VDC/1.0 A (General Purpose)
IP rating: contacts/terminals	IP40/IP00
Contact material	Silver
Short-circuit protection	10 A gL
Actuators, operating positions
Actuator	Push button, roller lever
Free position	9.00 ±0.15
Operating position	6.00 ±0.35
Release position	8.00 ±0.35
Total positive opening travel	5.20
Total travel position	5.00 min.
Movement differential (between operating and release position)	2.00 (typical)
Mechanical data
Front mount	yes, front mounting by nut retainers M3
Ganging (side mount)	yes, side mount
Vibration resistance	50 g (10 … 500 Hz all directions, without aux. actuator at 0.1 ms max. opening time)
Shock resistance	60 g, half sinus (without aux. actuator at 0.1 ms max. opening time)
Housing material	PC, beige transparent
Mechanical endurance	1 million cycles min.
Temperature range	-40 °C ... +85 °C
Note	Data valid for new switches with silver contacts

Schaltbau Snap-action switches, S820 series

Snap-action switches with enhanced current-carrying capacity

S820 switches add to the well proven standard series of snap-action switches with positive opening operation as developed by Schaltbau with an even more ruggedized design, featuring a current-carrying capacity which is twice as high (I _th = 20 A). They are, therefore, best suited for use under unfavourable ambient conditions which call for higher shock and vibration resistance. So the typical field of application is medium-voltage switchgear and controlgear.
The S820 Series switch is a Form Z SPDT with double-break contacts. Its two mechanically linked rigid contact bridges are electrically separated, thus ensuring the failsafe closing of two separate load circuits with independent voltage levels.
That is why S820 Series snap-action switches are also used as electromechanical switching elements in automation applications where the simultaneous handling of two separate load circuits is required.

Features

Positive opening operation: Reliable interruption even after contact welding, in compliance with IEC 60947-5-1, Annex K
Double break contacts: High electrical rating due to solid contact bridge and double break contacts
Precision switch: High switching accuracy and resistance to shock and vibration
Magnetic blowout: Optional blowout magnets to extinguish the arc at higher DC loads
Sealed to: IP40 in accordance with IEC 60529
Contact material: Silver