H-A inserts with screw termination up to 2.5 mm² wire cross section

The small, robust insert is suitable for power supply connectors and can be also used, for example, in machine or device manufacturing or in control systems.

  • Small power connector for single- or three-phase current
  • easy to assemble due to straight entry of conductors
  • Made in Germany

Supplementary automation components from LappMechanical and plant engineeringRailWind EnergyAssembly timeSpace requirementVariety of approval certifications


Article number Article descriptionContact typeNumber of operating contactsPackaging unitBase Unit

Price (base price)

H-A 3 screw termination
H-A 3 SSmale1 - 310
H-A 3 BSfemale1 - 310
Available from stock
In stock in Germany
Not available


  • The small H-A 3 / H-A 4 are used whenever there is minimal space.
  • Easy to service screw connection
  • Easy cable connection with strait cable entry in the contacts
  • Railway applications
    - Fire protection on railway vehicles: Test according EN 45545-2. Requirement sets R22 and R23. Hazard level HL1, HL2 and HL3

Application range

  • Machine and equipment manufacturing
  • Control engineering
  • Apparatus construction
  • Railway applications / vehicle construction

Classification ETIM 5

  • ETIM 5.0 Class-ID: EC000438
  • ETIM 5.0 Class-Description: Contact insert for industrial connectors

Classification ETIM 6

  • ETIM 6.0 Class-ID: EC000438
  • ETIM 6.0 Class-Description: Contact insert for industrial connectors

Rated voltage (V)

  • IEC: 400 V
    UL: 600 V
    CSA: 600 V

Rated impulse voltage

  • 4 kV

Rated current (A)

  • IEC: 23 A
    UL: 10 A
    CSA: 10 A

Pollution degree

  • 3


  • UL94 V-0

Contact resistance

  • 1.5 - 4 mohm


  • Copper alloy, hard silver-plated

Number of contacts

  • 3 + PE

Termination methods

  • Screw termination: 0.5 - 2.5 mm² (2.5 mm² with conductor end sleeves depending on the crimping profile)

Stripping length (mm)

  • 6

Cycle of mechanical operation

  • 100


  • Certified production control: VDE-REG. no.: B437
  • UL-tested:
    UL File Number: E75770

Temperature range

  • -40°C to +100°C, short-term up to +125°C

  • Photographs and graphics are not to scale and do not represent detailed images of the respective products.
  • Prices are net prices without VAT and surcharges. Sale to business customers only.