SAFETY KEY SF 4 A

The SF 4A Safety Switch is a tilt-sensing safety switch with a vertical bracket and a weight-activated mechanism that cuts off the circuit when tilted or tipped beyond 35°.

The SF 4A Safety Switch is a tilt safety switch designed to automatically cut off power if the device tips over or tilts beyond a specified angle. The switch body is mounted on a vertical bracket measuring 26 ±0.1 x 28.5 mm, made of 0.8 mm thick sheet metal; the product is mounted by screwing it directly onto the device chassis using the hole pattern on the bracket. The Ø20 x 17 mm weight located beneath the bracket keeps the contact closed while the device is in an upright position; when the device tilts beyond 35°, the weight mechanism shifts position, opening the contact and breaking the circuit. The switch body has a base dimension of 35 x 16 mm, a height of 22.3 mm, and a depth of 23.2 mm; the total height, including the weight, is 42.5 mm.

Operating at a voltage of 240 V AC and a current capacity of 16(4) A, the product is suitable for use with 16 A resistive and 4 A inductive loads. Thanks to its 125 °C (T125) temperature resistance, it can be safely installed inside the housings of heating devices. Connections are made via 6.3 x 0.8 mm tab terminals, enabling quick, tool-free wiring on mass production lines. With its On-Off (>35°) operating function, the SF 4A is used as a safety element in electric heaters, oil-filled radiators, fan heaters, and other portable household appliances at risk of tipping over. Its compact, vertical bracket design is suitable for installation in device interiors with limited vertical space.

The SF 4A Safety Switch, with a temperature resistance of 125 °C and a switching capacity of 16(4) A / 240 V AC, can be installed directly inside heating devices. Its mechanical design, which breaks the circuit when the device tilts more than 35°, ensures that the device returns to a safe position without requiring user intervention.

The product is designed and tested in accordance with the requirements of the relevant safety standards. It is capable of switching under a 16 A resistive / 4 A inductive load at 240 V AC, operating at an ambient temperature of 125 °C (T125) ambient temperature, and an electrical cycle rating of 1E4; it meets the safety criteria required for household appliances with heaters that pose a tipping hazard. The 6.3 x 0.8 mm tab terminal connection and perforated sheet metal bracket design provide repeatable and secure installation on mass production lines.

GENERAL FEATURES
Feature Value
Product Name SF 4A
Product Type Tilt Safety Switch
Category Terminal-Type
Operating Function On-Off (>35°)
Voltage 240 V AC
Current 16 (4) A
Electrical Life 10,000
Temperature 125 °C (T125)
Connection Type Terminal
Cable Type None
Terminal Type 6.3 x 0.8 mm Tab Terminal
Mounting Method Vertical (L) bracket with screw mounting
Bracket Dimensions 26 ±0.1 x 28.5 mm
Bracket Sheet Thickness 0.8 mm
Mounting Hole Pattern 18 x 14 mm / Ø4 / Ø3.4 / Ø3.1
Body Dimensions 35 x 16 x 22.3 mm
Body Depth 23.2 mm
Weight Ø20 x 17 mm
Total Height 42.5 mm
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