CBZE2BG Push-Pull Connector for Winding Resistance Testers 2026: 2B 2-Contact 20.5 A Panel Socket

The CBZE2BG-SFSM02-0000 is a CBZE2BG push-pull connector for winding resistance testers — a 2B fixed panel-mount circular receptacle with two low-voltage contacts, a published rated current of 20.5 A, a maximum electrical contact resistance of 3.3 mΩ, a push-pull self-latching mechanism, rear-panel mounting with an M15 panel drill hole, a chrome-plated brass shell, IP50 protection, operation from -45 °C to +125 °C and 5,000 mating cycles. Every specification in this guide is backed by the electrical test equipment interconnect engineering of Spring Technology.

Pain point: Pushing test current through a panel joint on a portable winding resistance tester — where every milliohm of contact resistance adds to the measured loop, leads are reconnected at every transformer terminal, and the instrument has to stay stable long enough for the reading to settle?

Core answer: The CBZE2BG-SFSM02-0000 is a fixed panel-mount circular receptacle designed for reliable electrical connections in industrial testing equipment, and can be considered for portable transformer winding resistance testers — its secure locking design and robust metal housing make it a potential solution for connecting external test cables in electrical maintenance and diagnostic applications. Portable transformer winding resistance testers are widely used in electrical power maintenance, transformer manufacturing and substation inspection, measuring the DC resistance of transformer windings to help identify loose connections, poor joints, winding defects and phase-to-phase resistance differences. During testing the instrument injects a controlled DC current into the winding and measures the resulting voltage to calculate resistance, so a dependable connection between the tester and its external test leads is essential for measurement stability and safe operation.

The CBZE2BG-SFSM02-0000 is a fixed panel receptacle on the 2B platform, offered with a two-contact configuration for current-output circuits.

• Latching Mechanism: Push-pull self-latching mechanism (secure mating during testing, quick disconnection when the test is complete)
• Recommended Hardware: Spring Technology Circular Connector and custom cable assembly service
• Key Metric: 2 low-voltage contacts; 20.5 A published rating; 3.3 mΩ maximum contact resistance; IP50; 5,000 mating cycles

Note: for winding resistance testers the actual test current must be selected according to the connector rating, cable specifications, contact temperature rise and the instrument’s operating conditions — higher-current test circuits require a separately engineered connection solution.

Resistance measurements expose every joint. The design advantages below explain why this CBZE2BG push-pull connector for winding resistance testers suits electrical test equipment:

• The CBZE2BG-SFSM02-0000 features two low-voltage contacts, a configuration suited to a two-conductor arrangement such as the current output connection between a resistance tester and its external test cable. For transformer testing equipment, a dedicated two-contact interface simplifies cable connection and helps organise the instrument’s output wiring.

• The published specification lists a rated current of 20.5 A for this connector, providing useful current-handling capability for compatible test equipment designed around its electrical limits — subject to the cable specifications, contact temperature rise and operating conditions noted above.

• Transformer maintenance technicians frequently connect and disconnect test cables when moving between different test points. The push-pull self-latching mechanism helps keep the connector securely mated during testing while allowing quick disconnection when the test is complete — improving connection convenience and reducing the risk of accidental cable separation during routine maintenance.

• The CBZE2BG-SFSM02-0000 is designed for rear-panel mounting with an M15 panel drill hole, so it can be integrated into the enclosure of a portable resistance tester, providing a dedicated and accessible connection point for external test leads while keeping the instrument’s internal wiring organised.

• The published maximum electrical contact resistance is 3.3 mΩ. Low contact resistance helps reduce unwanted voltage drop and connection losses when the connector operates within its rated conditions — an important consideration in electrical testing equipment, where connection quality can affect measurement stability. For precision resistance measurements, the instrument should use an appropriate measurement architecture that accounts for lead and connector resistance.

• The connector features a chrome-plated brass shell and is specified for 5,000 mating cycles, supporting repeated connection and disconnection during equipment setup, testing and maintenance. Its IP50 protection rating suits indoor or protected working environments, and it should not be treated as a waterproof connector.

Portable transformer winding resistance testers require dependable connections between the instrument and external test cables, so the connector must provide secure mating, suitable current-handling capability and convenient integration into the instrument enclosure. This CBZE2BG push-pull connector for winding resistance testers combines two low-voltage contacts, a 20.5 A rated current, low contact resistance and a push-pull self-latching system — characteristics that make it a potential option for the external current connection interface of compatible testers, helping manufacturers of electrical testing instruments create a compact, secure and serviceable panel connection.

The 2B shell belongs to Spring Technology’s push-pull connector family for industrial and electrical test equipment. The same platform serves this CBZE2BG push-pull connector for winding resistance testers and scales across plugs, fixed sockets and PCB sockets.

• Fixed panel sockets: ZEG.2B receptacles (as used here), plus ZGG.2B and ZCG.2B panel sockets.
• Fixed plugs: TAG.2B fixed plugs for panel-side mating.
• Cable plugs: TGG.2B straight plugs, including a 302-series insert listed as the matching plug for this receptacle.
• Pin counts: 2–26 contacts across the 2B shell, with key G or keys A…M and R.

• Custom contact allocations and part numbers (such as the CBZE2BG-SFSM02-0000) matched to each instrument’s output circuit.
• High-current test cable assemblies sized to the required conductor cross-section, with strain relief.
• Panel cutout and mounting arrangement support for portable instrument housings.
• Mating plug selection support, including keying and contact-layout confirmation.

The CBZE2BG-SFSM02-0000 is a potential panel-mount connector solution for portable transformer winding resistance testers — its two low-voltage contacts, 20.5 A rated current, push-pull locking mechanism and metal housing support reliable connections in compatible electrical test equipment. This connector shows how Spring Technology serves electrical test equipment, aligning a 20.5 A 2B panel socket with the customer’s tester requirements, and the company also provides professional customization services for both push-pull connectors and cable assemblies, offering tailored solutions to meet your specific technical requirements.

When selecting this connector, manufacturers should verify the test current, cable size, contact temperature rise, mating plug and measurement circuit design to ensure that the complete connection system meets the requirements of the instrument.

For more information about our 2B series connectors or to discuss your requirements, contact us at [email protected] or [email protected], or visit our website. Our engineering team will respond to your CBZE2BG push-pull connector for winding resistance testers enquiry within 24 hours.

• CBZE2BG Push-Pull Connector for Programmable DC Power Supplies 2026: 2B Series 2-Contact 20.5 A Output Socket for High-Power Power Equipment
• CBZG00BG Push-Pull Connector for Insulation Resistance Testers 2026: 00B Series 4-Contact M7 Panel Socket for Portable Test Instruments for US Client
• CBZC2BG Push-Pull Connector for Programmable DC Electronic Loads 2026: 2B Series 2-Contact 25 A Power Socket for High-Current DC Test Interfaces
• CBTG2FN Push-Pull Connector for Precision Machine Tools 2026: CBTG2FN-SMSM09-D520 and CBZL2FN-SFPM09-S000 for Multi-Channel Miniature Sensor Aggregation for Russian Client
• CBTG2BG Push-Pull Connector for Crash Test Equipment 2026: 2B Series 4-Contact 15 A Connector for Automotive Crash Test Data Acquisition Systems
• ZEG.2B Fixed Socket — Product Page
• TGG.2B Straight Plug — Product Page
• 2B Series Connector