Manual motor starter/motor protection circuit breaker with adjustable thermal-magnetic protection for motor starting and protection. Current ranges according to motor power; DIN rail mounting.
Tell us the reference or key specification (current, power, gauge, size), quantity and city — a technical advisor sends your quote the same business day.
The manual motor starter (motor protection circuit breaker) is a motor-protective switching device per IEC 60947-4-1: it combines an adjustable thermal overload trip (trip class 10) with a fixed magnetic short-circuit trip in a 45 mm DIN-rail module. Select the adjustment range that contains the motor nameplate current.
The thermal-magnetic manual motor starter is a compact device for protection and local switching of electric motors. It integrates adjustable thermal trip for overloads and magnetic trip for short circuits, so it is selected according to the motor rated current and panel coordination. At TECTUL it is quoted by current range, motor power, voltage and accessories. The actual lot data indicates adjustable thermal-magnetic protection, current ranges according to motor power and DIN rail mounting. It differs from an overload relay because the manual motor starter can operate as the protective switch for the motor circuit; the overload relay normally works coupled to a contactor and opens the control circuit on overload. IEC 60947-4-1 is a family reference for starters and motor protection in low voltage.
We dispatch thermal-magnetic manual motor starters to Bogotá, Medellín, Cali, Barranquilla and all of Colombia. Request a quote via WhatsApp with current, power and voltage.
| Thermal setting range | Characteristic |
|---|---|
| 1 – 1.6 A | Thermal trip adjustable to the motor nameplate current; fixed magnetic trip at ≈13 times the upper limit of the range (non-adjustable), set so the starting inrush does not trip it |
| 1.6 – 2.5 A | |
| 2.5 – 4 A | |
| 4 – 6.3 A | |
| 6 – 10 A | |
| 9 – 14 A · 13 – 18 A · 17 – 23 A · 20 – 25 A · 24 – 32 A |
Typical range ladder of IEC 60947-4-1 motor protection circuit breakers up to 32 A. The standard trip class is 10: tripping between 4 and 10 s at 7.2 times the set current per IEC 60947-4-1.
The price depends on the current range, accessories and application. TECTUL quotes via WhatsApp with a photo of the motor nameplate and system voltage.
The manual motor starter integrates thermal and magnetic protection for the motor circuit. The overload relay protects against overload and usually opens the contactor coil.
It is mounted on DIN rail, wired upstream of the motor or contactor-motor assembly, and adjusted to the rated current shown on the nameplate.
It depends on the required control. For manual starting the manual motor starter may be enough; for remote control, interlocks or automation it is used with a contactor.
The setting must be based on the motor nameplate rated current and the actual operating conditions.
Yes, if it is selected by motor current, voltage and starting scheme. Locked-rotor, operating and panel conditions must also be considered.
The motor starter has a thermal trip adjustable to the exact motor current and a high magnetic threshold (≈13 times the setting) to ride through starting; a C-curve miniature breaker per IEC 60898-1 trips at 5 to 10 times its rating and is not adjustable.
Class 10 for normal starts: it trips between 4 and 10 s at 7.2 times the set current per IEC 60947-4-1. Classes 20 and 30 are reserved for heavy, longer starts such as high-inertia fans and mills.
Updated: July 22, 2026
