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ATE Test Probes > PA4 & ST-PA4 Series >

2.54mm / 0.10" test centres

The PA4 Series is the universal size for use at 2.54mm test centres in the majority of ATE test fixtures. It has a very wide range of tip styles for almost all test targets. Additionally, a wide choice of spring forces is available. The ST-PA4 series adds hardened steel tips which ensure an exceptional resistance to wear in high volume PCB production runs. The LF-PA4 series has hardened tips, extra resilient plated surfaces and an enhanced pre-loaded spring pressure to enable good penetration of the tough residual contamination often found on the surface of many lead-free solders.

Test Probe Specification

Full travel
6.35mm (.250")
Working travel
4.24mm (.167")
Spring force
at wkg travel
'L' Extra light spring
57g (2.0oz)
'S' Light spring
114g (4.0oz)
'X' Heavy spring
170g (6.0oz)
'E' Extra heavy
227g (8.0oz)
'U' Ultra heavy spring
283g (10.0oz)
'W' Ultra heavy spring
350g (12.0oz)
Current rating DC (max)
cont shown with tip style
Minimum test centres
2.54mm (.100")


Receptacle Specification

Mounting hole size: 1.7/1.75mm.
1.75mm drill is most commonly used:
Drill part no. DA3. RIT tool part no. TA3, TA4A

How to Use


See receptacles at bottom of page

For pricing, availability or to place an order
click on a part no. below

Tip Style

CONCAVE HEAD - 8 amps max. / -55 to +150°C

CONCAVE HEAD - 8 amps max. / -55 to +150C

Tip Style

CONCAVE HEAD Light spring

CONCAVE HEAD Light spring

PA4AS

Tip Style

CONCAVE HEAD Extra light spring

CONCAVE HEAD Extra light spring

PA4AL

Tip Style

CONCAVE HEAD Heavy spring

CONCAVE HEAD Heavy spring

PA4AX

Tip Style

CONCAVE HEAD Ultra heavy spring

CONCAVE HEAD Ultra heavy spring

PA4AU

Tip Style

CONCAVE HEAD STEEL - 8 amps max.

CONCAVE HEAD STEEL - 8 amps max.

Tip Style

CONCAVE HEAD STEEL - Light spring

CONCAVE HEAD STEEL - Light spring

ST-PA4AS

Tip Style

CONCAVE HEAD STEEL - Heavy spring

CONCAVE HEAD STEEL - Heavy spring

ST-PA4AX

Tip Style

CONCAVE HEAD STEEL - Ultra heavy spring

CONCAVE HEAD STEEL - Ultra heavy spring

ST-PA4AU

Tip Style

SPEAR POINT - 8 amps max. / -55 to +150°C

SPEAR POINT - 8 amps max. / -55 to +150C

Tip Style

SPEAR POINT Light spring

SPEAR POINT Light spring

PA4BS

Tip Style

SPEAR POINT - Extra heavy spring

SPEAR POINT - Extra heavy spring

PA4BE

Tip Style

SPEAR POINT Heavy spring

SPEAR POINT Heavy spring

PA4BX

Tip Style

SPEAR POINT Ultra Heavy spring

SPEAR POINT Ultra Heavy spring

PA4BU

Tip Style

SPEAR POINT STEEL Light spring

SPEAR POINT STEEL Light spring

ST-PA4BS

Tip Style

SPEAR POINT STEEL Heavy spring

SPEAR POINT STEEL Heavy spring

ST-PA4BX

Tip Style

SPEAR POINT STEEL Extra heavy spring

SPEAR POINT STEEL Extra heavy spring

ST-PA4BE

Tip Style

SPEAR POINT STEEL Ultra heavy spring

SPEAR POINT STEEL Ultra heavy spring

ST-PA4BU

Tip Style

FLAT HEAD 1.5mm - 3 amps max./ -40 to +105°C

FLAT HEAD 1.5mm - 3 amps max./ -40 to +105C

Tip Style

SERRATED HEAD 1.5mm - 8 amps max. / -55 to +150°C

SERRATED HEAD 1.5mm - 8 amps max. / -55 to +150C

Tip Style

SERRATED HEAD 1.5mm Light spring

SERRATED HEAD 1.5mm Light spring

PA4HS

Tip Style

SERRATED HEAD 1.5mm Heavy spring

SERRATED HEAD 1.5mm Heavy spring

PA4HX

Tip Style

SERRATED HEAD 1.5mm Ultra heavy spring

SERRATED HEAD 1.5mm Ultra heavy spring

PA4HU

Tip Style

SERRATED HEAD 1.5mm Extra heavy spring

SERRATED HEAD 1.5mm Extra heavy spring

PA4HE

Tip Style

SERRATED HEAD 1.5mm STEEL - 8 amps max. / -55 to +150°C

SERRATED HEAD 1.5mm STEEL - 8 amps max. / -55 to +150C

Tip Style

SERRATED HEAD 1.5mm STEEL Light spring

SERRATED HEAD 1.5mm STEEL Light spring

ST-PA4HS

Tip Style

SERRATED HEAD 1.5mm STEEL Heavy spring

SERRATED HEAD 1.5mm STEEL Heavy spring

ST-PA4HX

Tip Style

SERRATED HEAD 1.5mm STEEL Extra heavy spring

SERRATED HEAD 1.5mm STEEL Extra heavy spring

ST-PA4HE

Tip Style

SERRATED HEAD 1.5mm STEEL Ultra heavy spring

SERRATED HEAD 1.5mm STEEL Ultra heavy spring

ST-PA4HU

Tip Style

SERRATED HEAD 2.0mm - 3 amps max./ -40 to +105C

SERRATED HEAD 2.0mm - 3 amps max./ -40 to +105C

Tip Style

SERRATED HEAD 2.5mm - 3 amps max./ -40 to +105°C

SERRATED HEAD 2.5mm - 3 amps max./ -40 to +105C

Tip Style

SERRATED HEAD 3mm - 3 amps max./ -40 to +105°C

SERRATED HEAD 3mm - 3 amps max./ -40 to +105C

Tip Style

SERRATED HEAD 4.0mm - 3 amps max./ -40 to +105°C

SERRATED HEAD 4.0mm - 3 amps max./ -40 to +105C

Tip Style

REDUCED RADIUS - 8 amps max. (for connector applications) / -55 to +150°C

REDUCED RADIUS - 8 amps max. (for connector applications) / -55 to +150C

Tip Style

REDUCED RADIUS Extra light spring

REDUCED RADIUS Extra light spring

PA4JL-064

Tip Style

REDUCED RADIUS - Light spring

REDUCED RADIUS - Light spring

PA4JS-064

Tip Style

REDUCED RADIUS - Heavy spring

REDUCED RADIUS - Heavy spring

PA4JX-064

Tip Style

REDUCED RADIUS Ultra heavy spring

REDUCED RADIUS Ultra heavy spring

PA4JU-064

Tip Style

PLAIN RADIUS- 3 amps max./ -40 to +105°C

PLAIN RADIUS- 3 amps max./ -40 to +105C

Tip Style

PLAIN RADIUS Light spring

PLAIN RADIUS Light spring

PA4JS

Tip Style

PLAIN RADIUS Heavy spring

PLAIN RADIUS Heavy spring

PA4JX

Tip Style

PLAIN RADIUS Ultra heavy spring

PLAIN RADIUS Ultra heavy spring

PA4JU

Tip Style

STAR HEAD - 3 amps max. / -40 to +105°C

STAR HEAD - 3 amps max. / -40 to +105C

Tip Style

STAR HEAD Light spring

STAR HEAD Light spring

PA4MS

Tip Style

STAR HEAD Heavy spring

STAR HEAD Heavy spring

PA4MX

Tip Style

STAR HEAD Ultra heavy spring

STAR HEAD Ultra heavy spring

PA4MU

Tip Style

0.5mm SMALL CROWN - 8 amps max./ -55 to +150°C

0.5mm SMALL CROWN - 8 amps max./ -55 to +150C

Tip Style

SMALL CROWN STEEL - 8 amps max./ -55 to +150°C LEAD FREE

SMALL CROWN STEEL - 8 amps max./ -55 to +150C LEAD FREE

Tip Style

SMALL CROWN Heavy spring - LEAD FREE

SMALL CROWN Heavy spring  - LEAD FREE

LF-PA4QX-018

Tip Style

SMALL CROWN Ultra Heavy spring - LEAD FREE

SMALL CROWN Ultra Heavy spring  - LEAD FREE

LF-PA4QU-018

Tip Style

PLAIN CROWN Light spring STEEL

PLAIN CROWN Light spring STEEL

ST-PA4QPS-040

Tip Style

PLAIN CROWN Heavy spring STEEL

PLAIN CROWN Heavy spring STEEL

ST-PA4QPX-040

Tip Style

PLAIN CROWN Extra heavy spring STEEL

PLAIN CROWN Extra heavy spring STEEL

ST-PA4QPE-040

Tip Style

PLAIN CROWN Ultra heavy spring STEEL

PLAIN CROWN Ultra heavy spring STEEL

ST-PA4QPU-040

Tip Style

1.3mm CROWN - 8 amps max./ -55 to +150°C - LEAD FREE

1.3mm CROWN - 8 amps max./ -55 to +150C - LEAD FREE

Tip Style

1.3mm CROWN Heavy spring - LEAD FREE

1.3mm CROWN Heavy spring  - LEAD FREE

LF-PA4QX-050

Tip Style

1.3mm CROWN Extra heavy spring STEEL - LEAD FREE

1.3mm CROWN Extra heavy spring STEEL - LEAD FREE

LF-PA4QE-050

Tip Style

1.3mm CROWN Ultra heavy spring STEEL - LEAD FREE

1.3mm CROWN Ultra heavy spring STEEL - LEAD FREE

LF-PA4QU-050

Tip Style

1.5mm CROWN - 3 amps max./ -40 to +105°C

1.5mm CROWN - 3 amps max./ -40 to +105C

Tip Style

TULIP HEAD - 8 amps max./ -55 to +150°C

TULIP HEAD - 8 amps max./ -55 to +150C

Tip Style

TULIP HEAD Light spring

TULIP HEAD Light spring

PA4RS

Tip Style

TULIP HEAD Heavy spring

TULIP HEAD Heavy spring

PA4RX

Tip Style

TULIP HEAD Extra heavy spring

TULIP HEAD Extra heavy spring

PA4RE

Tip Style

TULIP HEAD Ultra heavy spring

TULIP HEAD Ultra heavy spring

PA4RU

Tip Style

TULIP HEAD STEEL - 8 amps max./ -55 to +150°C

TULIP HEAD STEEL - 8 amps max./ -55 to +150C

Tip Style

TULIP HEAD Light spring STEEL

TULIP HEAD Light spring STEEL

ST-PA4RS

Tip Style

TULIP HEAD Heavy spring STEEL

TULIP HEAD Heavy spring STEEL

ST-PA4RX

Tip Style

TULIP HEAD Extra heavy spring STEEL

TULIP HEAD Extra heavy spring STEEL

ST-PA4RE

Tip Style

TULIP HEAD Ultra heavy spring STEEL

TULIP HEAD Ultra heavy spring STEEL

ST-PA4RU

Tip Style

PLAIN PYRAMID 0.9mm - 8 amps max./ -55 to +150°C

PLAIN PYRAMID 0.9mm - 8 amps max./ -55 to +150C

Tip Style

PLAIN PYRAMID 0.9mm Light spring

PLAIN PYRAMID 0.9mm Light spring

PA4TS-036

Tip Style

PLAIN PYRAMID 0.9mm Heavy spring

PLAIN PYRAMID 0.9mm Heavy spring

PA4TX-036

Tip Style

PLAIN PYRAMID 0.9mm Extra heavy spring

PLAIN PYRAMID 0.9mm Extra heavy spring

PA4TE-036

Tip Style

PLAIN PYRAMID 0.9mm Ultra heavy spring

PLAIN PYRAMID 0.9mm Ultra heavy spring

PA4TU-036

Tip Style

PLAIN PYRAMID 0.9mm Light spring STEEL

PLAIN PYRAMID 0.9mm Light spring STEEL

ST-PA4TS-036

Tip Style

PLAIN PYRAMID 0.9mm Heavy spring STEEL

PLAIN PYRAMID 0.9mm Heavy spring STEEL

ST-PA4TX-036

Tip Style

PLAIN PYRAMID 0.9mm Extra heavy spring STEEL

PLAIN PYRAMID 0.9mm Extra heavy spring STEEL

ST-PA4TE-036

Tip Style

PLAIN PYRAMID 0.9mm Ultra heavy spring STEEL

PLAIN PYRAMID 0.9mm Ultra heavy spring STEEL

ST-PA4TU-036

Tip Style

SHARP PYRAMID STEEL - 8 amps max./ -55 to +150°C LEAD FREE

SHARP PYRAMID STEEL - 8 amps max./ -55 to +150C LEAD FREE

Tip Style

SHARP PYRAMID Heavy spring - LEAD FREE

SHARP PYRAMID Heavy spring - LEAD FREE

LF-PA4TX-041

Tip Style

SHARP PYRAMID Extra heavy spring - LEAD FREE

SHARP PYRAMID Extra heavy spring - LEAD FREE

LF-PA4TE-041

Tip Style

SHARP PYRAMID Ultra heavy - LEAD FREE

SHARP PYRAMID Ultra heavy - LEAD FREE

LF-PA4TU-041

Tip Style

1.5mm PYRAMID HEAD 3 amps max / -40 to +105°C

1.5mm PYRAMID HEAD  3 amps max / -40 to +105C

Tip Style

2.0mm PYRAMID HEAD 3 amps max / -40 to +105°C

2.0mm PYRAMID HEAD  3 amps max / -40 to +105C

Tip Style

2.5mm PYRAMID HEAD Heavy spring 3 amps max / -40 to +105°C

2.5mm PYRAMID HEAD Heavy spring  3 amps max / -40 to +105C

PA4TX-2.5

Tip Style

3.5mm PYRAMID HEAD Heavy spring 3 amps max /-40 to +105°C

3.5mm PYRAMID HEAD Heavy spring  3 amps max /-40 to +105C

PA4TX-3.5

Tip Style

SUPER SHARP 3-NEEDLE - 8 amps max./ -55 to +150°C

SUPER SHARP 3-NEEDLE - 8 amps max./ -55 to +150C

Tip Style

SUPER SHARP 3-NEEDLE L spring

SUPER SHARP 3-NEEDLE L spring

PA4VS

Tip Style

SUPER SHARP 3-NEEDLE H spring

SUPER SHARP 3-NEEDLE H spring

PA4VX

Tip Style

SUPER SHARP 3-NEEDLE EH spring

SUPER SHARP 3-NEEDLE EH spring

PA4VE

Tip Style

SUPER SHARP 3-NEEDLE UH spring

SUPER SHARP 3-NEEDLE UH spring

PA4VU

Tip Style

SUPER SHARP 3-NEEDLE STEEL - 8 amps max./ -55 to +150°C

SUPER SHARP 3-NEEDLE STEEL - 8 amps max./ -55 to +150C

Tip Style

SUPER SHARP 3-NEEDLE Light spring STEEL

SUPER SHARP 3-NEEDLE Light spring STEEL

ST-PA4VS

Tip Style

SUPER SHARP 3-NEEDLE H spring STEEL

SUPER SHARP 3-NEEDLE H spring STEEL

ST-PA4VX

Tip Style

SUPER SHARP 3-NEEDLE UH spring STEEL

SUPER SHARP 3-NEEDLE UH spring STEEL

ST-PA4VU

Tip Style

8 POINT CROWN HEAD - 8 amps max. / -55 to +150°C

8 POINT CROWN HEAD - 8 amps max. / -55 to +150C

Tip Style

8 POINT CROWN HEAD Light spring

8 POINT CROWN HEAD Light spring

PA4ZS

Tip Style

8 POINT CROWN HEAD Heavy spring

8 POINT CROWN HEAD Heavy spring

PA4ZX

Tip Style

8 POINT CROWN HEAD Extra heavy spring

8 POINT CROWN HEAD Extra heavy spring

PA4ZE

Tip Style

8 POINT CROWN HEAD Ultra heavy spring

8 POINT CROWN HEAD Ultra heavy spring

PA4ZU

Lead-Free Solder Tip Style

SUPER-SHARP BLADE - 8 amps max./ -55 to +150°C - LEAD FREE

SUPER-SHARP BLADE -  8 amps max./ -55 to +150C - LEAD FREE

Lead-Free Solder Tip Style

SUPER-SHARP BLADE H spring - LEAD FREE

SUPER-SHARP BLADE H spring - LEAD FREE

LF-PA4KX

Lead-Free Solder Tip Style

SUPER-SHARP BLADE E H spring - LEAD FREE

SUPER-SHARP BLADE E H spring - LEAD FREE

LF-PA4KE

Lead-Free Solder Tip Style

SUPER-SHARP BLADE U H spring - LEAD FREE

SUPER-SHARP BLADE U H spring - LEAD FREE

LF-PA4KU

Lead-Free Solder Tip Style

STEEL SHARP 90° BLADE - 8 amps max./ -55 to +150°C. - LEAD FREE

STEEL SHARP 90 BLADE -  8 amps max./ -55 to +150C. - LEAD FREE

Lead-Free Solder Tip Style

SHARP 90° BLADE H spring - LEAD FREE

SHARP 90 BLADE H spring - LEAD FREE

LF-PA4IX

Lead-Free Solder Tip Style

STEEL SHARP 90° BLADE E H spring - LEAD FREE

STEEL SHARP 90 BLADE E H spring - LEAD FREE

LF-PA4IE

Lead-Free Solder Tip Style

SHARP 90° BLADE U H spring - LEAD FREE

SHARP 90 BLADE U H spring - LEAD FREE

LF-PA4IU

Lead-Free Solder Tip Style

ROBUST 90° BLADE - 8 amps max./ -55 to +150°C - LEAD FREE

ROBUST 90 BLADE - 8 amps max./ -55 to +150C - LEAD FREE

Lead-Free Solder Tip Style

ROBUST 90° BLADE H spring - LEAD FREE

ROBUST 90 BLADE H spring - LEAD FREE

LF-PA4I8X

Lead-Free Solder Tip Style

ROBUST 90° BLADE E H spring - LEAD FREE

ROBUST 90 BLADE E H spring - LEAD FREE

LF-PA4I8E

Lead-Free Solder Tip Style

ROBUST 90° BLADE U H spring - LEAD FREE

ROBUST 90 BLADE U H spring - LEAD FREE

LF-PA4I8U

Tip Style

STEEL CROSS BLADE - 8 amps max./ -55 to +150°C

STEEL CROSS BLADE -  8 amps max./ -55 to +150C

Tip Style

STEEL CROSS BLADE L spring

STEEL CROSS BLADE L spring

ST-PA4LS

Tip Style

STEEL CROSS BLADE H spring

STEEL CROSS BLADE H spring

ST-PA4LX

Tip Style

STEEL CROSS BLADE U spring

STEEL CROSS BLADE U spring

ST-PA4LU

Tip Style

SHARP DAGGER - 8 amps max./ -55 to +150°C - LEAD FREE

SHARP DAGGER -   8 amps max./ -55 to +150C - LEAD FREE

Tip Style

Sharp dagger - Heavy spring - LEAD FREE

Sharp dagger - Heavy spring - LEAD FREE

LF-PA4TX-042

Tip Style

SHARP DAGGER EH spring - LEAD FREE

SHARP  DAGGER EH spring - LEAD FREE

LF-PA4TE-042

Standard

Sharp dagger/Ultra hvy spring - LEAD FREE

Sharp dagger/Ultra hvy spring - LEAD FREE

LF-PA4TU-042

Tip Style

Sharp dagger UH spring

Sharp dagger UH spring

ST-PA4TU-042

Receptacle

CRIMP

CRIMP

RA4C

Receptacle

SOLDER CUP

SOLDER CUP

RA4S

Receptacle

0.64mm ROUND PIN

0.64mm ROUND PIN

RA4R

Receptacle

1.0mm ROUND PIN

1.0mm ROUND PIN

RA4R-040

Receptacle

WIRE-WRAP

WIRE-WRAP

RA4W

Receptacle

Receptacle - Wire wrap

Receptacle - Wire wrap

RA4W3

Receptacle

WIRE WRAP

WIRE WRAP

RA4W12

Receptacle

RECEPTACLE WIREWRAP

RECEPTACLE WIREWRAP

RA4WL

Receptacle

WIRE WRAP

WIRE WRAP

RA4WLL

Receptacle

WIREWRAP

WIREWRAP

RA4WLLL