SAFETY KEY SF 3 A

The SF 3A Safety Switch is a tilt-sensing safety switch with a stepped sheet-metal bracket and a weight-based mechanism that cuts off the circuit when tilted or tipped beyond 35°.

The SF 3A 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 stepped sheet metal bracket 26 ±0.1 mm wide, which features mounting holes; thanks to the bend in the bracket, the switch can be positioned at a specific distance from the device chassis, and the total length, including the bracket, is 48 mm. The Ø20 x 17 mm weight located beneath the bracket keeps the contact closed when 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 is 22.3 mm high and 23.2 mm deep; the total height, including the weight, is 42.5 mm.

Operating at 240 V AC and with 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 fast, tool-free wiring on assembly lines. With its On-Off (>35°) operating function, the SF 3A is used as a safety component in electric heaters, oil-filled radiators, fan heaters, and other portable household appliances at risk of tipping over. The stepped bracket design allows the switch to be adapted to different mounting surfaces inside the device and to applications with varying heights.

The SF 3A 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 unit tips beyond 35°, ensures that the device returns to a safe position without user intervention.

The product is designed and tested in accordance with the requirements of relevant safety standards. It is capable of switching under a 16 A resistive / 4 A inductive load at 240 V AC, can operate 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 tip-over risk. The 6.3 x 0.8 mm tab terminal connection and perforated sheet metal bracket design provide repeatable and secure assembly on mass production lines.

GENERAL FEATURES
Product Name SF 3A
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 Screw-on mounting with stepped sheet metal bracket
Bracket Dimensions 26 ±0.1 mm width / 48 mm overall length
Bracket Sheet Metal Thickness Other
Mounting Hole Pattern 18 x 14 mm / Ø4 / Ø3.4 / Ø3.1
Body Dimensions 35 x 22.3 mm
Body Depth 23.2 mm
Weight Ø20 x 17 mm
Total Height 42.5 mm
Our Similar Products
SAFETY KEY SF 6 A
SAFETY KEY SF 6 A
Security Keys
SAFETY KEY SF 1 A
SAFETY KEY SF 1 A
Security Keys
SECURITY KEY SF 2 A
SECURITY KEY SF 2 A
Security Keys
SAFETY KEY SF 4 A
SAFETY KEY SF 4 A
Security Keys
SAFETY KEY SF 5 A
SAFETY KEY SF 5 A
Security Keys