Technical Parameters General Product Type: Auxiliary contact block Model: HKF1‑11 Mounting Type: Front / top mount accessory for compatible starters and contactors Series / Compatibility: Suitable for modular control devices such as MS116, MS132, MS165 manual motor protectors and similar devices Contact Configuration: 1 × Normally Open (NO) + 1 × Normally Closed (NC) Electrical Ratings Rated Insulation Voltage (Ui): ~690 V Rated Operational Voltage (Ue): Suitable for control/auxiliary circuits up to industrial control voltages Rated Operational Current: Typical auxiliary circuit rating suitable for 1–6 A loads (control/feedback circuits) Rated Impulse Withstand Voltage (Uimp): Elevated to standard auxiliary device limits Contact Type: Silver‑based (or equivalent) industrial contact material Mechanical Terminal Connection: Screw terminal type Installation Orientation: Front / top mounting onto starter body Mechanical Life: High cycle capability for frequent auxiliary feedback operations Contact Actuation: Operates with main starter contacts Performance Switching Frequency: Designed for auxiliary control switching load cycles Compatibility With Motor Protection: Works alongside overload/trip feedback and interlock functions Physical & Dimensions Compact Modular Design: Space‑efficient mounting Weight: Lightweight accessory Construction: Durable industrial‑grade plastic and metal parts for robust panel use Environmental Operating Temperature Range: Typical industrial ambient temperatures Pollution Degree: Designed for typical industrial environments Ingress Protection: IP20 at terminals; front mounting in panel can offer additional protection Applications Adding auxiliary feedback to manual motor starters Providing interlocking contacts for control logic circuits Status signaling to PLCs and control systems Enhancing control panel logic with NO/NC feedback Use in motor control centers and industrial automation panels