Measurement accuracy starts at the connection
Precision test leads, banana plugs, alligator clips, test probes, quick-release terminals and OBD II diagnostic connectors — engineered for labs, universities and automotive diagnostics.
Why connection quality defines measurement accuracy
In test and measurement environments, every connection in the signal path contributes to the quality of your result. Inconsistent contact resistance, poor insulation or worn tips don’t just cause inconvenience — they introduce measurement error.
Schützinger has been manufacturing precision test connectors in Stuttgart, Germany since 1950. Their lamella-basket contact technology maintains consistent, low-resistance contact across thousands of insertions — the kind of repeatability that matters in calibration work, lab research and high-frequency diagnostics.
Fast, tool-free connections with consistent contact every time
Engineered to eliminate connection variability in multi-channel test environments — tool-free insertion with a stable 5mΩ contact resistance, every time.
Available for both metal and non-metal panel mounting. The push-button mechanism allows fast reconfiguration without a screwdriver, reducing setup time in multi-channel test environments. Standard models are rated 30V AC / 60V DC — safety versions are rated to 300V CAT II.
- Vibration-resistant contactinlaid gill plate maintains secure connection even in environments with movement or vibration
- 5mΩ contact resistanceconsistent, repeatable measurements without signal-degrading connections
- Tool-free push-button operationfaster reconfiguration in high-cycle test environments
- Safety versions to 300V CAT IIsuitable for laboratory and instrumentation use requiring safe touch-proof connections
- Available in up to 11 coloursfor clear polarity and circuit identification
- Rated current up to 16Asuitable for demanding bench-top applications
| Parameter | Value |
|---|---|
| Contact resistance | 5 mΩ |
| Rated voltage (standard) | 30 VAC / 60 VDC |
| Rated voltage (safety version) | 300 V CAT II |
| Rated current | 5A – 16A (model dependent) |
| Operating temperature | -25°C to +90°C |
| Panel thickness | 0.8 mm – 7 mm |
| Insulation material | PA 6.6 (Polyamide) |
| Contact plating | Nickel-plated (gold on request) |
| Available colours | Up to 11 including black, red, blue, yellow, green, grey, brown, white, orange, purple, green-yellow |
Test leads engineered to stay flexible, safe and accurate — year after year
Reduces the risk of measurement error introduced by degraded insulation and increased contact resistance — double-insulated PVC that stays flexible through years of heavy lab use.
Standard 4mm measuring leads are built on highly flexible double-insulated PVC cable (1mm²) and fitted with lamella-basket plugs at both ends. Safety versions rated to 1000V CAT II use reinforced double-insulated PVC and shrouded connectors for safe use in live measurement environments. Available in lengths from 25cm to 250cm.
- Won’t stiffen or crack with repeated usedouble-insulated PVC cable engineered for long-term flexibility
- No more stretching or tangling25cm to 250cm lengths so you always have the right reach for your bench setup
- Safety-rated for live circuit testingversions up to 1000V CAT II and 1000V CAT III available
- No adapters needed4mm inline socket fits straight into standard test accessories
- Colour-coded rangeup to 10 colours for clear circuit identification
| Parameter | Standard Lead | Safety Lead |
|---|---|---|
| Cable cross-section | 1 mm² PVC | 1–2.5 mm² PVC |
| Insulation | Double-insulated | Double-insulated |
| Contact resistance | 5–40 mΩ | 4–40 mΩ |
| Rated voltage | 30 VAC / 60 VDC | 600V CAT III / 1000V CAT II |
| Rated current | 16 A | 10–32 A |
| Available lengths | 25, 50, 75, 100, 150, 200, 250 cm | |
| Operating temperature | -10°C to +70°C | |
| Contact plating | Nickel-plated (gold on request) | |
Clips that hold their ground — literally
Used in environments where stable contact under movement matters — Schützinger clips maintain consistent clamping force across a wide conductor range with nickel-plated contacts built for repeated daily use.
Available in standard (30V AC / 60V DC) and safety versions (600V CAT II). The inline 4mm socket connection makes them directly compatible with standard banana plug test leads — no adapters required. Grips conductors up to 8mm diameter. Safety versions feature full insulation to IEC standards for use in live measurement environments.
- Grips up to 8mm diameter conductorssuitable for a wide range of test points and wire gauges
- Nickel-plated contactscorrosion-resistant for reliable conductivity over repeated use
- Inline 4mm socketcompatible with standard banana plug test leads, no adapters needed
- Safety versions to 600V CAT IIfully insulated for live circuit testing
- Rated to 16Asuitable for demanding test bench applications
| Parameter | Standard | Safety Version |
|---|---|---|
| Contact resistance | 5–100 mΩ | 15 mΩ |
| Rated voltage | 30 VAC / 60 VDC | 600V CAT II (2mm) / up to 1000V CAT III (4mm) |
| Rated current | 10–16 A (16A rated at +40°C) | 10 A |
| Jaw opening | 8mm diameter max | |
| Contact material | Nickel-plated | Nickel-plated |
| Insulation | Optional PVC sleeve | Full PA 6.6 insulation |
| Terminal | 4mm inline socket | 2mm safety socket (2mm programme) / 4mm safety socket (4mm programme) |
| Operating temperature | -20°C to +80°C | |
When the test point is awkward, your probe shouldn’t be
Probe tips that slip, flex unevenly or degrade over time introduce measurement inconsistency. Schützinger probes use spring-loaded tips and gold-plated copper beryllium contact materials to maintain stable, repeatable contact — even on awkward or densely populated test points.
Safety test probes rated to 1000V CAT II with inline 4mm safety socket connection. Spring-loaded 5mm contact tip maintains consistent contact force regardless of user pressure variance — critical for repeatable results in calibration and validation work. Available with interchangeable tip inserts for different test point geometries.
- Stable contact force at all test pointsspring-loaded tip eliminates pressure variance between users and sessions
- Resists wear in high-cycle environmentsgold-plated copper beryllium tips maintain low contact resistance over thousands of uses
- Works with your existing setupinline 4mm socket connects directly to standard test leads and accessories
- Safe for live circuit testing1000V CAT II rated for demanding lab and instrumentation environments
| Probe Type | Contact Resistance | Rated Voltage | Rated Current | Tip | Terminal |
|---|---|---|---|---|---|
| 2mm spring-loaded tip | 15 mΩ | 1000V CAT II | 1 A | Steel, 5mm spring | 2mm safety socket |
| Standard rigid tip | 20 mΩ | 1000V CAT II | 32 A | Steel, fixed | 4mm safety socket |
| Spring-loaded tip | 20 mΩ | 1000V CAT II | 1 A | Steel, 5mm spring | 4mm safety socket |
| Flexible tip (inaccessible points) | 20 mΩ | 1000V CAT II | 5 A | Steel, flexible shaft | 4mm safety socket |
| Gold-plated CuBe2 tip (compact) | <10 mΩ | 1000V CAT II | 10 A | CuBe2, gold-plated | 4mm safety socket |
| Hook clip (small, 5mm) | 50 mΩ | 1000V CAT II | 6 A | Stainless steel hook | 4mm safety socket |
| Hook clip (large, 12mm) | 3 mΩ | 1000V CAT IV | 20 A | Stainless steel hook | 4mm safety socket |
| Pincer / alligator clip | 50 mΩ | 1000V CAT III | 6 A | Alligator jaws | 4mm safety socket |
| All types — operating temperature | -25°C to +80°C | ||||
Note on current ratings: Spring-loaded and flexible tip probes carry lower current ratings (1–5A) than rigid tip probes (up to 32A). This is because the spring mechanism reduces the contact area between tip and test point, limiting current-carrying capacity. For high-current applications, a rigid tip or hook clip probe is recommended.
The backbone of any serious lab setup
Engineered to eliminate the signal instability caused by worn or loose connections — lamella-basket contact technology maintains consistent pressure across thousands of insertions without degradation.
Available in 2mm (for microelectronics) and 4mm (standard lab) sizes, in both nickel-plated and gold-plated versions. The 4mm range is rated to 32A continuous — suitable for demanding bench-top and power distribution applications. The 2mm range is rated to 10A, ideal for compact and high-density electronics setups. Panel-mount sockets available for metal and non-metal panels. Available in a wide range of colours for polarity and circuit identification.
- Consistent electrical contactlamella-basket technology maintains stable performance across repeated insertions and extended use
- Secure mating fitengineered tolerances reduce looseness and minimise intermittent connection issues
- 2mm and 4mm sizescompact 2mm for microelectronics, 4mm for standard lab applications
- Designed for high-use environmentssuitable for teaching labs and test benches with frequent connection changes
- Low contact resistancefrom 2mΩ (gold-plated) for accurate signal transfer in measurement applications
| Parameter | 2mm Plug (Ni) | 2mm Plug (Au) | 2mm Socket | 4mm Plug (Ni) | 4mm Plug (Au) | 4mm Socket |
|---|---|---|---|---|---|---|
| Contact resistance | 3 mΩ | 2 mΩ | 5 mΩ (Ni) / 3 mΩ (Au) | 3 mΩ | 2 mΩ | 10 mΩ |
| Rated voltage | 30 VAC / 60 VDC | |||||
| Rated current | 10 A | 32 A | 32 A | |||
| Operating temperature | -25°C to +90°C | -30°C to +110°C | -25°C to +80°C | |||
| Contact material | Nickel-plated | Gold-plated | Ni or Au plated | Nickel-plated | Gold-plated | Nickel-plated |
| Insulation | PA 6.6 | TPE | PA 6.6 | |||
| Panel hole (socket) | — | 5.1mm diameter | — | 7.5mm diameter | ||
Reliable OBD II connections for fast, accurate automotive diagnostics
Diagnosis time is often lost to one thing: unstable OBD connections. Schützinger’s OBD II connectors and breakout boxes give autoelectricians secure, stable connections and pin-level access — without back-probing or risking damage to vehicle ports.
Available in 12V (passenger vehicles) and 24V (commercial vehicles) configurations. The OBD II breakout box provides individual access to all 16 pins via labelled 4mm connecting sockets in a 13mm/21mm grid — enabling clean, safe live signal measurement, circuit isolation and CAN bus diagnostics without disturbing the vehicle’s wiring.
- Secure, stable connection every timepositive pin tension eliminates the “is it the car or the connector?” doubt mid-diagnosis
- Access all 16 OBD II pins individuallybreakout box eliminates back-probing and the risk of damaging customer vehicle ports
- Measure live signals safely4mm connecting sockets provide secure test points for CAN, power and ground circuits
- 12V and 24V configurationscovers passenger cars, vans and heavy commercial vehicles
- Gold-plated contactsfor maximum durability and minimum contact resistance in high-cycle diagnostic use
| Parameter | OBD II Connector | Breakout Box |
|---|---|---|
| Configurations | 12V / 24V | 12V / 24V |
| Contact plating | Gold-plated | Nickel & gold-plated |
| Housing material | PA 6.6 UL94–V2 | Aluminium |
| Rated voltage | 30 VAC / 60 VDC | |
| Rated current | 10 A | |
| Pin access (breakout box) | — | 16 × 4mm sockets, labelled |
| Grid spacing (breakout box) | — | 13 mm / 21 mm |
| Operating temperature | -25°C to +80°C | |
| OBD standard | OBD II (ISO 15031 / SAE J1962) | |
Not sure which connector you need?
Our team has 25+ years of connector expertise. We’ll help you find the right Schützinger product for your application.
Frequently asked questions
Technical questions about Schützinger test connectors — answered directly.