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Switch Probes

SW-3, SW-4 and SW-5 Series Probes

Switch Probe is a spring contact probe and receptacle combination that is normally open, and after a designated travel the switch probe closes. The most common use for switch probes is in the cable harness testing industry. The switch probe is used to verify the correct location of a terminal in a connector while checking the retention force as well. Switch probes also verify the presence of nonconductive components such as caps for connectors or devices on a circuit board. Smiths Interconnect offers three standard sizes of switch probes.

Features & Benefits

  • SW-3, SW-4 and SW-5 Series probes
  • 0.125", 0.156" and 0.187" centers;
  • 3 A current rating
  • Spring force options between 4.00 and 8.60 oz.
  • ≤2.760" (70.10 mm) overall lengths

Product Specifications

Probe Centers Probe OAL Max Travel Travel to Swtich Mating Receptacle
SW-3    Series 0.125 (3.18) 1.830 (46.48) 0.295 (7.49) 0.025
0.156 (3.96) 1.930 (49.02) 0.160 (4.06) 0.107
0.187 (4.75) 2.760 (70.10) 0.190 (4.83) 0.030

Dimensions are in inches (mm) | All specifications are subject to change.

Receptacle Tooling

Receptacle Insertion Tool
R-4-CR Series RT-4
R-5-SW Series RT-5


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