Snap-action switches, S970 series

Snap-action switches S970 − Variant with ruggedized housingmade from polyetherimide (PEI)

Thanks to the high-performance thermoplastic used as housing material, S970 Series snap-action switches feature both a better resistance to temperature and chemicals as well as a 50% higher impact resistance compared to polycarbonate (PC).
They are ideally suited for applications characterized by harsh environmental conditions. Sharing the same design as the S870 switches, they can easily replace a standard switch without great effort.

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.
Precision switch: High switching accuracy and resistance to shock and vibration
Wiping contacts: Continuous low contact resistance ensures high contact reliability over the entire design life of the switch
IP rating: IP40; IP60, IP67 in accordance with IEC 60529 (IP code)
Contact material: Silver or gold

Applications

Limit switch for use on machines, doors and plant-controls
Switches for driver‘s cab of rail vehicles and control panels in cranes
Electromechanical switch for automation tasks
Safety switch in control units

Special

Technical Basics

of Schaltbau snap-action switches with positive opening operation

S970 - rugged and reliable

New variant of the S870 switch especially designed for use in harsh environments

Specifications

Electrical Data
Contact configuration	SPDT (Form C) snap-action switch with 3 terminals, positive opening operation, and wiping action
Conv. thermal current I_th EN60947	10 A at T = 85°C
Conv. thermal current I_th UL508	10 A at T = 85°C
Rated insulation voltage U_i EN60947	250 V
Rated insulation voltage U_i UL508	240 V
Pollution degree IEC 60947	PD 3
Pollution degree UL508	PD 2
Rated impulse withstand voltage U_imp	4 kV
Utilization category IEC 60947	AC-15, 230 VAC/1.5 A / DC-13, 60 VDC/0.5 A
Utilization category UL508	240 V AC/1.5 A / DC 60 VDC/0.5 A (General Purpose)
IP rating: contacts/terminals	IP40/IP00, IP40/IP20, IP60/00, IP67/00
Contact material	Silver or gold
Short-circuit protection	10 A gG
Actuators, operating positions
Actuator	Push button, roller lever, plain lever, simulated roller lever
Free position	16.0 ±0.1
Operating position	14.8 ±0.2
Release position	15.1 ±0.2
Total positive opening travel	13.3
Total travel position	< 13.0
Movement differential (between operating and release position)	0.3 (typical)
Mechanical data
Front mount	---
Ganging (side mount)	yes, side mount
Actuation speed	max. 1.0 m/s, min. 0.1 mm/s
Vibration resistance	50 g (10 … 500 Hz all directions, without aux. actuator at 0.1 ms max. opening time)
Shock resistance	70 g, half sinus (without aux. actuator at 0.1 ms max. opening time)
Housing material	PEI, amber transparent / PEI, black
Mechanical endurance	10 million cycles min., dependent on version
Temperature range	-55 °C ... +150 °C max., dependent on version
Note	Data valid for switches with silver contacts. Data valid for new switches under laboratory conditions and at room temperature, unless otherwise mentioned.