ICT/FCT Spring Test Probes · 138 mil

F773 ICT/FCT Test Probe

F773 is an ICT/FCT test probe series in the EMSGLOB range, listed under 138 mil. It works at a pitch down to 3.50 mm / 138 mil, has an overall length of 27 – 28 mm and offers 4 mm of working travel.

Electrically it is specified for a rated current of 10 A, a typical resistance of 25 mΩ and an operating range of -45 °C to +80 °C. There are 37 catalogue part numbers in this series, covering 12 tip or head styles such as Concave stepped, Serrated stepped, Hexagonal 90° stepped, Spherical. The barrel is bronze with gold plating.

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Specifications

Structure	Basic Contact Probe
Pitch	3.50 mm / 138 mil
Operating temperature	-45 °C to +80 °C
Protrusion height	10 mm
Barrel diameter	2.65 mm
Collar diameter	3 mm
Barrel material	Bronze
Barrel plating	Gold
Nominal travel	4 mm
Maximum travel	5 mm
Pointing accuracy	± 0.1 mm
Continuous current	10 A
Typical contact resistance	25 mΩ
Total length (range)	27 – 28 mm
Tip style diameter (range)	1.8 – 4 mm
Press ring diameter	3 mm
Preload (range)	30 – 100 cN
Spring force (range)	100 – 400 cN

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

F773 ICT/FCT test probe – dimension drawing — Dimension drawing

Part numbers (37)

Part number	Tip style	Tip style diameter	Spring force	Preload	Total length	Plunger material
F77305B230G150	05 – Concave stepped	2.3 mm	150 cN	50 cN	27 mm	Beryllium copper
F77305B230G300	05 – Concave stepped	2.3 mm	300 cN	80 cN	27 mm	Beryllium copper
F77306B230G150	06 – Serrated stepped	2.3 mm	150 cN	50 cN	27 mm	Beryllium copper
F77306B230G300	06 – Serrated stepped	2.3 mm	300 cN	80 cN	27 mm	Beryllium copper
F77306B230G400	06 – Serrated stepped	2.3 mm	400 cN	100 cN	27 mm	Beryllium copper
F77306B300G150	06 – Serrated stepped	3 mm	150 cN	50 cN	27 mm	Beryllium copper
F77306B300G220	06 – Serrated stepped	3 mm	220 cN	30 cN	27 mm	Beryllium copper
F77306B300G300	06 – Serrated stepped	3 mm	300 cN	80 cN	27 mm	Beryllium copper
F77306B300G400	06 – Serrated stepped	3 mm	400 cN	100 cN	27 mm	Beryllium copper
F77306B400G150	06 – Serrated stepped	4 mm	150 cN	50 cN	27 mm	Beryllium copper
F77306B400G300	06 – Serrated stepped	4 mm	300 cN	80 cN	27 mm	Beryllium copper
F77306B400G400	06 – Serrated stepped	4 mm	400 cN	100 cN	27 mm	Beryllium copper
F77307S230L300	07 – Hexagonal 90° stepped	2.3 mm	300 cN	80 cN	27 mm	Steel
F77307S400L300	07 – Hexagonal 90° stepped	4 mm	300 cN	80 cN	27 mm	Steel
F77311B180G150	11 – Spherical	1.8 mm	150 cN	50 cN	27 mm	Beryllium copper
F77311B180G300	11 – Spherical	1.8 mm	300 cN	80 cN	27 mm	Beryllium copper
F77312B230G150	12 – Spherical stepped	2.3 mm	150 cN	50 cN	27 mm	Beryllium copper
F77312B230G300	12 – Spherical stepped	2.3 mm	300 cN	80 cN	27 mm	Beryllium copper
F77312B230G400	12 – Spherical stepped	2.3 mm	400 cN	100 cN	27 mm	Beryllium copper
F77312B300G150	12 – Spherical stepped	3 mm	150 cN	50 cN	27 mm	Beryllium copper
F77312B300G300	12 – Spherical stepped	3 mm	300 cN	80 cN	27 mm	Beryllium copper
F77312E230U150	12 – Spherical stepped	2.3 mm	150 cN	50 cN	28 mm	Steel
F77314S230L150	14 – 4-point crown stepped (self-cleaning)	2.3 mm	150 cN	50 cN	27 mm	Steel
F77314S230L300	14 – 4-point crown stepped (self-cleaning)	2.3 mm	300 cN	80 cN	27 mm	Steel
F77315B300G300	15 – Triangular 45° stepped	3 mm	300 cN	80 cN	27 mm	Beryllium copper
F77315B300G400	15 – Triangular 45° stepped	3 mm	400 cN	100 cN	27 mm	Beryllium copper
F77316B180G300	16 – Flat	1.8 mm	300 cN	80 cN	27 mm	Beryllium copper
F77317B230G100	17 – Flat stepped	2.3 mm	100 cN	40 cN	27 mm	Beryllium copper
F77317B230G150	17 – Flat stepped	2.3 mm	150 cN	50 cN	27 mm	Beryllium copper
F77317B300G150	17 – Flat stepped	3 mm	150 cN	50 cN	27 mm	Beryllium copper
F77317B300G300	17 – Flat stepped	3 mm	300 cN	80 cN	27 mm	Beryllium copper
F77318B180G150	18 – Conical 30°	1.8 mm	150 cN	50 cN	27 mm	Beryllium copper
F77318B180G300	18 – Conical 30°	1.8 mm	300 cN	80 cN	27 mm	Beryllium copper
F77321S180L150	21 – 4-point crown (self-cleaning)	1.8 mm	150 cN	50 cN	27 mm	Steel
F77321S180L300	21 – 4-point crown (self-cleaning)	1.8 mm	300 cN	80 cN	27 mm	Steel
F77328B230G300	28 – 4-point crown stepped	2.3 mm	300 cN	80 cN	27 mm	Beryllium copper
F77328B230G400	28 – 4-point crown stepped	2.3 mm	400 cN	100 cN	27 mm	Beryllium copper

FAQ

What pitch and length is F773?

F773 has a pitch of 3.50 mm / 138 mil, total length of 27 – 28 mm and protrusion height of 10 mm. The full dimension list is in the specification table on this page.

How much current can F773 carry?

The rated continuous current is 10 A, with a typical resistance of 25 mΩ.

Which part numbers and tip styles are available for F773?

37 part numbers are listed, for example F77305B230G150, F77305B230G300, F77306B230G150. Tip or head styles include Concave stepped, Serrated stepped, Hexagonal 90° stepped, Spherical, Spherical stepped, 4-point crown stepped (self-cleaning). The table on this page lists every part number with its tip and spring data.

What temperature range is F773 rated for?

F773 is specified for -45 °C to +80 °C.

How do I get a price or sample for F773?

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 F773 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.

Enquire / Request Quote sales@emsglob.com +91-7383235369