Snap-action switch S804 – Microswitch for medium and high power ranges

Version of the S800 with connections on the side; changeover contact with a contact bridge and positive opening

S804 b Snap-action switch S804 with pushbutton and connections on the side

The S804 snap-action switch offers the switch mechanism of the S800 series in another design – with connections on the side. The mechanical and electrical properties are identical. As with the S800, this microswitch switches medium to high power ranges; the break contacts are secured with a mechanical positive opening. The S804 is therefore suitable for safety applications, such as the monitoring of positions and end positions.


Changeover contact with a solid contact bridge.

Microswitch with a contact bridge which is guided by a plunger. When this snap-action switch is actuated, the bottom contact pair is opened (connections 1 and 2) and the top one is closed (connections 3 and 4).

Continuous thermal current up to 10 A; disconnecting medium to high power ranges

A contact bridge spreads the breaking capacity over two contact points. The contact material is silver. For the switching of high direct currents, we recommend blow magnets for preventing electric arcs (optional).

Break contacts with positive opening

If the break contacts fuse in the event of a short circuit, the catch spring can no longer open. It is nevertheless opened reliably via the lever of the positive opening. This is a positive opening as outlined in DIN EN 60947-5-1, annex K.

Shock resistance 30 g, vibration resistance 80 g

The switch mechanism of this microswitch has been designed to be especially robust. Catch springs and return springs are designed so that the switching process works reliably even in the event of shocks and vibrations.

Dimensions 36 x 30 x 22 mm (L x H x W)

This is the maximum dimensions of the housing. The dimensions of the actuator and of the connections must be added. For all dimensions and drawings please refer to the following product catalogue:



Electrical Data
Contact configurationSPDT-DB (Form Za) snap-action switch with double-break contacts, 4 terminals, and positive opening operation
Conv. thermal current Ith EN6094710 A at T = 85°C
Conv. thermal current Ith UL5085 A at T = 85°C
Rated insulation voltage Ui EN60947400 V
Rated insulation voltage Ui UL508300 V
Pollution degree IEC 60947PD 3
Pollution degree UL508PD 3
Rated impulse withstand voltage Uimp4 kV
Utilization category IEC 60947AC-15, 230 VAC/3.0 A / DC-13, 110 VDC/1.0 A
Utilization category UL508240 V AC/1.5 A / DC 120 VDC/1.0 A (General Purpose)
IP rating: contacts/terminalsIP40/IP00
Contact materialSilver
Short-circuit protection6 A gL
Actuators, operating positions
ActuatorPush button
Free position13.35 ±0.15
Operating position11.10 ±0.35
Release position12.30 ±0.35
Total positive opening travel10.35
Total travel position10.15 min.
Movement differential (between operating and release position)1.30 (typical)
Mechanical data
Front mount---
Ganging (side mount)yes, side mount
Vibration resistance30 g (10 … 500 Hz all directions, without aux. actuator at 0.1 ms max. opening time)
Shock resistance80 g, half sinus (without aux. actuator at 0.1 ms max. opening time)
Housing materialPC, green transparent
Mechanical endurance10 million cycles min.
Temperature range-40 °C ... +85 °C
NoteData valid for new switches with silver contacts

Related Downloads

Catalogue D20 – Snap-action switches S800, S804, S814, S820
Changeover switches with double-break contacts and positive opening operation
Safety instructions snap-action switches
Snap-action switches S800 / S804 / S814 / S818 / S819 / S820 / S826 / S834 / S840 / S845 / S846 / S847 / S850 / S870 / S880 / S926 / S947 / S970
Safety instructions snap-action switches / Supplementary details
Snap-action switches S800 / S804 / S814 / S818 / S819 / S820 / S826 / S834 / S840 / S845 / S846 / S847 / S850 / S870 / S880 / S926 / S947 / S970
Manual SE-M
Snap-action switches S800 / S804 / S814 / S818 / S819 / S820 / S826 / S840 / S845 / S846 / S847 / S850 / S870 / S880 / S926 / S947 / S970 — Installation and Maintenance Instructions
/en/products/snap-action-switches/thank-you/Snap-action switch S804Snap-action switches

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