HMA Hinged Armature Auxiliary Relay

The Type HMA relay is an instantaneous auxiliary device whose contacts are opened and closed by the movement of a hinged armature.

Type HMA Century Series auxiliary relays are designed to provide additional contacts, higher contact carrying and interrupting ratings, timing, interlocking, electrical separation and other auxiliary functions.
The Century Series coil design provides longer operating life than previous designs as a result of changes in the entire coil insulation system.

Features and Benefits
  • Front or back connected
    •
  • Molded Textolite case
    •  Applications
  • Contact multiplication
    •  Protection and Control
  • High speed pickup
    •
  • Self-resetting
    •

    Supply for the following models remain available:

  • HMA11A – back connected relay supplied with cover
  • HMA11B – front connected relay supplied without cover

    •

    Last time buy has been announced for the following models:

    • HMA12 is under last-time buy. Orders may be placed until 3rd March 2025 and will be fulfilled based upon availability.  As an alternative, please refer to the HMA11.

    • HMA24 is under last-time buy. Orders may be placed until 3rd March 2025 and will be fulfilled based upon availability. As an alternative, please refer to the HMA11.

    Manufacturing for the following models has been discontinued:

    • HMA25 -  Manufacturing for HMA25 has been discontinued.  As an alternative, please refer to the HMA11 relay.

    HMA Hinged Armature Auxiliary Relay

    The Type HMA relay is an instantaneous auxiliary device whose contacts are opened and closed by the movement of a hinged armature.

    Type HMA Century Series auxiliary relays are designed to provide additional contacts, higher contact carrying and interrupting ratings, timing, interlocking, electrical separation and other auxiliary functions.
    The Century Series coil design provides longer operating life than previous designs as a result of changes in the entire coil insulation system.

    Features and Benefits
  • Front or back connected
    •
  • Molded Textolite case
    •  Applications
  • Contact multiplication
    •  Protection and Control
  • High speed pickup
    •
  • Self-resetting
    •

    Supply for the following models remain available:

  • HMA11A – back connected relay supplied with cover
  • HMA11B – front connected relay supplied without cover

    •

    Last time buy has been announced for the following models:

    • HMA12 is under last-time buy. Orders may be placed until 3rd March 2025 and will be fulfilled based upon availability.  As an alternative, please refer to the HMA11.

    • HMA24 is under last-time buy. Orders may be placed until 3rd March 2025 and will be fulfilled based upon availability. As an alternative, please refer to the HMA11.

    Manufacturing for the following models has been discontinued:

    • HMA25 -  Manufacturing for HMA25 has been discontinued.  As an alternative, please refer to the HMA11 relay.

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