Test Clips - Alligator, Crocodile, Heavy Duty

Image Part Number Description / PDF Quantity Rfq
72-125

72-125

NTE Electronics, Inc.

MINIATURE ALLIGATOR CLIP

0

72-118-KIT3

72-118-KIT3

NTE Electronics, Inc.

CLIP + INSULATOR KIT

36

72-120

72-120

NTE Electronics, Inc.

GENERAL PURPOSE TEST CLIP

0

72-138-0

72-138-0

NTE Electronics, Inc.

STEEL CLIP COPPER PLATED W/2 BLK

459

72-160-KIT2

72-160-KIT2

NTE Electronics, Inc.

CLIP + INSULATOR KIT

6

72-190

72-190

NTE Electronics, Inc.

ALLIGATOR CLIP- 80AMP W/INSUL HA

91

72-117-KIT1

72-117-KIT1

NTE Electronics, Inc.

CLIP + INSULATOR KIT

0

72-117-KIT3

72-117-KIT3

NTE Electronics, Inc.

CLIP + INSULATOR KIT

67

72-153-KIT

72-153-KIT

NTE Electronics, Inc.

4PCS 72-153/2PCS 72-157-0

73

72-129

72-129

NTE Electronics, Inc.

TOOTHLESS ALLIGATOR CLIP

4028

72-188-0

72-188-0

NTE Electronics, Inc.

ALLIGATOR CLIP INS 10A BK

2144

72-144

72-144

NTE Electronics, Inc.

PLIER CLIP COPPER NON-INSUL 75A

1076

72-058

72-058

NTE Electronics, Inc.

LARGE CROCODILE CLIP 1KV

616

72-114

72-114

NTE Electronics, Inc.

HEAVY DUTY COPPER CLIP

1048

72-134-2

72-134-2

NTE Electronics, Inc.

PLIER TYPE CLIP 400A W/2 RED INS

6

72-123-KIT1

72-123-KIT1

NTE Electronics, Inc.

CLIP + INSULATOR KIT

3

72-174PS

72-174PS

NTE Electronics, Inc.

HEAVY DUTY CLIP 100 AMP

278

72-168-KIT

72-168-KIT

NTE Electronics, Inc.

2PC 72-168/1PC 72-166-0

0

72-163-KIT1

72-163-KIT1

NTE Electronics, Inc.

CLIP + INSULATOR KIT

3

72-158-0

72-158-0

NTE Electronics, Inc.

ALLIGATOR CLIP STEEL 10A W/BLK I

1527

Test Clips - Alligator, Crocodile, Heavy Duty

1. Overview

Alligator, Crocodile, and Heavy Duty test clips are specialized electrical connectors used for temporary connections in testing and measurement applications. These clips enable secure attachment to conductors, components, or devices under test (DUTs) while ensuring electrical continuity and safety. Their importance spans across electronics manufacturing, automotive diagnostics, power systems, and research laboratories, where reliable signal transmission and high-current capacity are critical.

2. Main Types and Functional Classification

TypeFunctional FeaturesApplication Examples
Alligator ClipsLightweight, spring-loaded jaws with serrated edges for low-current (up to 1A) connectionsPCB testing, battery terminal connections, signal tracing
Crocodile ClipsMedium-duty design with wider jaws (2-10A capacity) and insulation sleevesAutomotive wiring diagnostics, power supply testing, electrochemistry
Heavy Duty ClipsHigh-current (10-100A) rated with reinforced jaws and heat-resistant materialsIndustrial motor testing, battery bank analysis, high-power electronics

3. Structure and Components

Typical construction includes: - **Jaw Assembly**: Made from phosphor bronze or beryllium copper with nickel/platinum plating - **Spring Mechanism**: Stainless steel springs for consistent clamping force - **Insulation Housing**: Thermoplastic elastomer (TPE) or polyvinyl chloride (PVC) sleeves - **Termination**: 4mm banana plug, BNC connector, or solder terminal options - **Contact Points**: Replaceable tungsten carbide tips for high-wear applications

4. Key Technical Specifications

ParameterTypical RangeImportance
Current Rating0.5A - 100ADetermines power handling capability
Voltage Rating30V - 1000VEnsures dielectric strength and safety
Wire Size CompatibilityAWG 10-28Affects connection reliability
Contact Resistance<5m Minimizes measurement errors
Operating Temperature-20 C to +125 CDefines environmental suitability

5. Application Fields

Key industries include: - **Electronics Manufacturing**: SMT reflow oven calibration, component testing - **Automotive**: ECU diagnostics, starter motor analysis, battery pack validation - **Energy Systems**: Solar inverter testing, wind turbine controller verification - **Research Labs**: Material resistance testing, prototype validation - **Aerospace**: Avionics harness continuity checks, fuel cell characterization

6. Leading Manufacturers and Products

ManufacturerRepresentative ProductKey Features
Keysight TechnologiesN285xA High-Current Clips150A rating with thermal protection
Fluke CorporationT80 Series Test LeadsCat IV 600V safety rating
TE ConnectivityMicroCrocodile Clips0.1A precision for medical device testing
Pomona Electronics6520A Heavy Duty ClipsCorrosion-resistant marine-grade plating

7. Selection Guidelines

Key consideration factors: - Match current/voltage ratings to application requirements - Verify jaw opening size for DUT geometry compatibility - Choose appropriate insulation level for working voltage - Consider tip material for contact resistance stability - Evaluate environmental requirements (temperature, humidity) - Prioritize safety certifications (IEC 61010, UL 61010)

Example: For 12V automotive battery testing, select Crocodile clips with minimum 10A rating, 20mm jaw opening, and PVC insulation.

8. Industry Trends

Current development directions include: - Integration with smart test systems via IoT connectivity - Adoption of carbon fiber reinforced polymer (CFRP) materials for weight reduction - Enhanced EMI shielding for high-frequency measurement applications - Standardization of color-coded insulation for improved safety - Development of self-cleaning contact surfaces using nanocoatings

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