Konrak Metal Limit Switch
A robust limit switch in a strong die-cast metal shell, built around a double-break, force-break snap-action contact block (1NO + 1NC). The ±95° swing arm carries a large roller, and the sealed metal body with an M18 × 1.5 cable gland is suited to demanding industrial duty.
One body, many ways to actuate
The TSA is available with a range of heads and actuators so that it can be matched to almost any motion profile.
Roller swing arm
Standard swing arm with a large roller; travel ±95°.
Adjustable roller arm
Arm length and angle adjustable for a precise trip point.
Rod / spring lever
Flexible rod for light-touch detection and long over-travel.
Whisker (cat's whisker)
Coil-spring actuator for very low operating forces.
Plunger
Top plunger for direct, in-line actuation.
Left / right versions
Mirrored versions are available for opposite mounting.
Related codes: TSA-001…034, 041, 051, 061, 071, 081 — please confirm the required actuator and orientation.
Switching capacity
Rated values to IEC/EN 60947-5-1. Continuous thermal current and utilisation categories for the TSA.
| Rated voltage | Rated operational current | Utilisation category |
|---|---|---|
| 125 / 250 V AC | 10 (4) A | AC-15 · DC-13 |
| 380 V AC | 6 (2) A | AC-15 |
Inductive load values are given for a power factor cos φ = 0.4.
Actuation data
Operating forces and travels — matching the switch to your mechanism ensures a reliable, repeatable trip point.
| Actuator | OF max | RF min | PT max | OT min | TT min |
|---|---|---|---|---|---|
| Roller swing arm (±95°) | 6.86 N | 1.96 N | 20° (1.8 mm) | 75° (4.0 mm) | 95° (5.8 mm) |
| Adjustable roller arm | 4.9 N | 0.98 N | 20° | 75° | 95° |
| Rod / spring lever | 0.98 N | 0.39 N | 30 mm | 20 mm | 50 mm |
OF operating force · RF release force · PT pre-travel · OT over-travel · TT total travel. Typical values — confirm for the specific head.
TSA technical data
| Housing | Strong die-cast metal shell with a sealed cover |
| Actuator | Swing arm with a large roller, travel ±95°; other heads available |
| Contact block | 1NO + 1NC, double-break force-break snap action |
| Rated insulation voltage (Ui) | 380 V |
| Conventional thermal current (Ith) | 10 A |
| Rated operational current | 10 (4) A at 125/250 V AC · 6 (2) A at 380 V AC (cos φ = 0.4) |
| Cable entry | M18 × 1.5 cable gland |
| Terminal screw torque | 6 – 8 kgf·cm · cover 12–14 · head 8–9 · mounting 50–60 kgf·cm |
| Max. conductor | Ø 2 mm solid · cable Ø 12 mm max. |
| Operating speed | 5 mm/s – 0.5 m/s |
| Contact resistance | ≤ 25 mΩ (initial) |
| Insulation resistance | > 100 MΩ (500 V DC) |
| Dielectric strength | 1000 V AC same polarity · 1500 V AC current-carrying to non-current-carrying and terminal-to-ground |
| Ambient temperature | −5 … +65 °C |
| Humidity | < 95% RH |
| Standards | EN 50041 · IEC/EN 60947-5-1 · IEC 337-1 · VDE 0660 |
| Marking | CE · CCC |
Values shown are typical for this series — please confirm against the current datasheet and drawing for the exact variant required.
Why choose the TSA
Strong metal shell
A die-cast metal housing resists impact and mechanical abuse far better than a plastic body.
±95° swing arm
A wide lever travel with a large roller copes with cams, dogs and irregular moving parts.
Double-break contacts
Two breaks per circuit (1NO + 1NC) raise the breaking capacity and extend contact life.
Force-break snap action
Contacts change over positively for a clean, repeatable signal.
M18 × 1.5 cable gland
A metric gland keeps the enclosure sealed and simplifies wiring.
Stainless steel internals
The roller, plunger and spring are in stainless steel for corrosion resistance.
Adjustable arms
Arm length and angle can be adjusted so the switch trips exactly where needed.
Long service life
A rugged mechanism and hard-wearing contacts suit high-cycle industrial duty.
Where the TSA is used
Heavy machine tools
End-of-travel and position detection on presses, machining centres and slides.
Cranes and hoists
Travel limits, slewing limits and slack-rope detection.
Conveyors and steel plant
Product sensing, end stops and indexing in tough environments.
Door and gate control
Open / closed position feedback on industrial doors and gates.
Automation
Position sensing on linear and rotary axes.
Outdoor and wash-down
Sealed metal construction for dusty, damp or wash-down locations.
Frequently asked questions
Why choose a metal shell?
A die-cast metal housing withstands impact and mechanical abuse and dissipates heat, so it suits tougher duty than a plastic body.
What contacts does the TSA have?
A double-break contact block with 1 normally-open and 1 normally-closed contact (1NO + 1NC).
What is the lever travel?
The swing arm has a total travel of ±95°.
What is the degree of protection?
IP66 — dust-tight and protected against powerful water jets.
What cable gland is used?
An M18 × 1.5 cable gland.
Which standards does it meet?
EN 50041, IEC/EN 60947-5-1, IEC 337-1 and VDE 0660.
Need the right TSA limit switch?
Tell us the actuator, the contact arrangement and the mounting you need — our team will confirm the exact model and can supply samples or OEM versions.
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