IP65 Key Switch, 5 A @ 250 V ac 2-Way, -25 → +55°C

  • RS Stock No. 745-2439
  • Manufacturer RS PRO
Technical data sheets
Legislation and Compliance
RoHS Certificate of Compliance
COO (Country of Origin): TW
Product Details

RS IP65 Key Switches - ADA16K Series (16mm)

Sub-assembled, modular construction, alternate action, Key Switches designed to fit industry standard 16mm diameter cut-outs in panels with a thickness between 0.5 and 5mm. The Key operators can be fitted to any of the Contact Blocks allowing various combinations of switching (for Contact Blocks see stock numbers 745-2427, 745-2423 and 745-2420). Each Contact Block has 2.8x0.5mm universal terminals that allow either direct soldering or plug in receptacles. Installation and assembly is quick and easy, once fully fitted each Key Switch has a waterproof panel sealing to IP65.
These two position Key Switches feature single entry keys (can only be inserted into the lock one way up), 90 degree indexing and same (common) key profile. Stock number 745-2433 key is trapped (non-removable) at 90º while stock number 745-2439 is non-trapping (key removable) at 0º and 90º.
A square bezel converter (stock number 745-2552) can be used to change the Key Switches into flush countersunk mounted versions. Each converter is supplied with a fixing bow, gasket and a black plastic flush mounting bezel.
Other switches in the ADA16 series include Rotary Selector switch, Buzzer, Emergency Stop (E stop), Pilot Light Indicators and sub-assembled, modular construction, illuminated or non illuminated Push Button switches, to view a portion of these see stock numbers 745-2436, 745-2445, 745-2442, 745-2486 and 745-2449 respectively.

Waterproof rated to IP65
16mm Ø panel cut out
Two versions available, trapping (key removable in one position) or non-trapping (key removable in both positions)
Square 18x18mm operator fascia with alternate switching
VDE rated to 5A 250Vac (8A 125Vac)
Silver contacts
Insulation resistance >50MΩ
UL94-V0 flammability rated
-25 to +55°C operating temperature range


Supplied with 2 keys, spare keys currently not available.
Contact blocks must be ordered separately, see stock numbers 745-2427, 745-2423 and 745-2420.
For suitable contact block mating connectors see stock number 680-2158 typically.



Attribute Value
Number of Positions 2
Switch Operation Latching
Contact Current Rating 5 A @ 250 V ac
IP Rating IP65
Terminal Type Tab
Bezel Shape Square
Key Index Angle 90°
Contact Material Silver
Operating Temperature Range -25 → +55°C
Minimum Operating Temperature -25°C
Voltage Rating AC 250V
Maximum Operating Temperature +55°C
Voltage Rating DC 30V
Mechanical Life >200000Operations
Standards Met CUL, ENEC, UL, VDE
47 In stock for delivery within 2 working days
Unit of sale: Each
(exc. VAT)
(inc. VAT)
Per unit
1 - 24
25 - 99
100 - 249
250 - 499
500 +
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