ICT/FCT Spring Test Probes
HCF773 ICT/FCT Test Probe
HCF773 is an ICT/FCT test probe series in the EMSGLOB range. It suits a minimum pitch of 4.50 mm / 177 mil, measures 27.3 mm in total length and offers 4 mm of working travel.
Electrically it is specified for a rated current of 30 A, a typical resistance of 8 mΩ and an operating range of -45 °C to +200 °C. It is ordered as part number HCF77306B400G600. The plunger is beryllium copper with gold plating, and the barrel is brass with gold plating.

Specifications
| Structure | Basic Contact Probe |
|---|---|
| Pitch | 4.50 mm / 177 mil |
| Operating temperature | -45 °C to +200 °C |
| Additional definition | HC |
| Total length | 27.3 mm |
| Protrusion height | 10.3 mm |
| Barrel diameter | 2.65 mm |
| Tip style diameter | 4 mm |
| Press ring diameter | 3 mm |
| Collar diameter | 3 mm |
| Tip style | 06 – Serrated stepped |
| Plunger material | Beryllium copper |
| Plunger plating | Gold |
| Barrel material | Brass |
| Barrel plating | Gold |
| Spring material | High-grade steel |
| Spring plating | Uncoated |
| Preload | 170 cN |
| Spring force | 600 cN |
| Nominal travel | 4 mm |
| Maximum travel | 5 mm |
| Pointing accuracy | ± 0.1 mm |
| Continuous current | 30 A |
| Typical contact resistance | 8 mΩ |
Values as listed for this series. Confirm the exact data for your part number with your quotation.
Applications
- In-circuit testing (ICT) of assembled PCBs
- Functional testing (FCT) of modules and finished boards
- Bed-of-nails test fixtures and adapters
- Contacting pads, vias, pins and wire-wrap posts
- Threaded, push-back and anti-rotation designs for special fixture layouts

Part numbers (1)
| Part number |
|---|
| HCF77306B400G600 |
FAQ
What pitch and length is HCF773?
HCF773 has a pitch of 4.50 mm / 177 mil, total length of 27.3 mm and protrusion height of 10.3 mm. The full dimension list is in the specification table on this page.
How much current can HCF773 carry?
The rated continuous current is 30 A, with a typical resistance of 8 mΩ.
What temperature range is HCF773 rated for?
HCF773 is specified for -45 °C to +200 °C.
How do I get a price or sample for HCF773?
Send the part number, quantity and your application to sales@emsglob.com or call +91-7383235369, or use the enquiry form on the contact page. Prices are quoted per enquiry.
More ict/fct spring test probes
Enquire / Request a quote
Tell us the HCF773 part number, the quantity and your pitch, travel and current requirements, and the EMSGLOB team will reply with availability and a quotation. Drawings in STEP, IGES, PDF, DWG, DXF or ZIP are welcome.