Panasonic Electric Works TX2SA-3V-Z

Panasonic Electric Works TX2SA-3V-Z Product Summary

The TX2SA-3V-Z by Panasonic Electric Works stands out as a high-performance telecom relay, designed with a double pole double throw (DPDT, 2 Form C) contact arrangement and a 2A/3V DC rating. As part of Panasonic’s TX relay series, it delivers a balance of compact size, high contact reliability, and energy efficiency, targeting demanding telecom, industrial, and instrumentation environments. Its RoHS compliance, strong breakdown voltage performance, and extensive type variants position the TX2SA-3V-Z as a versatile component for engineers seeking robust relay solutions.

Main Characteristics of the TX2SA-3V-Z Relay

One of the defining characteristics of the TX2SA-3V-Z is its enhanced insulation and voltage endurance. The relay features a 2,000V breakdown voltage between contact and coil and 1,000V between open contacts, achieved through a sealed coil-body design. Surge resistance is also a highlight, offering 1,500V across open contacts (FCC part 68 conditions) and 2,500V from contact to coil (per Bellcore requirements).

The relay’s high sensitivity is driven by Panasonic’s polar magnetic circuit “seesaw balance mechanism”, resulting in a nominal operating power consumption of only 140mW, and a minimum operating power down to 79mW. This makes the TX2SA-3V-Z especially suitable for battery-sensitive and high-density designs.

The contact capacity is substantial for telecom applications, with gold-clad twin crossbar contacts supporting up to 2A at 30V DC. Furthermore, variants are available with AgPd contacts, optimized for low-level analog switching (up to 10V DC/10mA), expanding the applicability to precision instrumentation.

Mechanical ruggedness is embedded into the design; the TX2SA-3V-Z withstands functional shocks up to 750m/s² and destructive shocks up to 1,000m/s². Vibration resistance specifications ensure operational integrity in environments subject to mechanical stress.

The relay's small footprint (15.0 x 7.4 x 8.2 mm) makes it apt for modern, space-constrained PCB layouts. Its sealed construction supports automatic washing, streamlining the manufacturing process.

TX2SA-3V-Z Series Model Variations and Installation Methods

The TX2SA-3V-Z series is engineered for a broad spectrum of mounting preferences in mass production. Available terminal and packaging types include:

Standard PC board terminal (tube packing)

Self-clinching terminal (tube packing)

Surface-mount terminal, with three subtypes:

- SA: Low-profile, surface-mount

- SL: High-reliability connection surface-mount

- SS: Space-saving surface-mount

For automated assembly, both tube and tape-and-reel packaging are available (tube: 40/1000 pcs per case, tape-and-reel: 500/1000 pcs per case). This variety allows system designers to select the most efficient workflow for board assembly and relay population. Additionally, specific suffixes in the part numbering system (such as '-1' for AgPd contacts) facilitate the correct selection for specialized circuit requirements.

Electrical Properties and Technical Data for TX2SA-3V-Z

The electrical parameters of the TX2SA-3V-Z are rigorously defined for stability in telecom and electronic switching circuits. The coil is specified for high efficiency, with several operating modes supported: single side stable, 1 coil latching, and 2 coil latching. Typical values, such as the 140mW nominal power, are achieved through the efficient magnetic circuit.

Switching characteristics are robust, with a maximum contact load of 2A at 30V DC and a demonstrated long electrical life under these conditions. The contact material’s gold-clad design further enhances low-level switching reliability, with special AgPd-contact versions available for analog circuits.

Breakdown and surge performance meet stringent telecom industry standards. The electrical life is evaluated using stringent cycling protocols, confirming stable operation over extended periods and in challenging environmental scenarios.

Mechanical Design and Durability of TX2SA-3V-Z

The TX2SA-3V-Z is designed with mechanical endurance as a foremost criterion. It offers mechanical life and electrical life validated through accelerated testing (for example, operation at 180 cycles per minute). Shock and vibration resistance are specified for both functional and destructive thresholds, ensuring the device remains dependable in ruggedized and mobile applications.

Thermal characteristics, such as coil temperature rise, have been characterized under both standard and high-temperature ambient conditions, allowing system designers to simulate thermal effects in their environmental modeling. The sealed case not only supports cleaning but also protects the relay mechanism from contamination during operation and assembly.

Use Cases and Application Areas for TX2SA-3V-Z

Engineers will find the TX2SA-3V-Z suitable for a wide range of end products. Typical use cases include:

Communications infrastructure (xDSL, transmission switching)

Measurement instrumentation

Security systems

Consumer electronics, including home appliances and AV equipment

Automotive control circuits

Medical devices requiring compact, high-reliability relays

The series' voltage and current performance, paired with rugged environmental survivability, make the TX2SA-3V-Z a top choice for equipment where both switching performance and small size are critical.

TX2SA-3V-Z Handling, Packaging, and Assembly Guidelines

To facilitate efficient production, the TX2SA-3V-Z is supplied in both tube and tape-and-reel forms, supporting high-throughput surface-mount assembly. Packaging orientation is marked for easy automated handling, and there are clear guidelines for the application of chucking pressures to avoid internal damage during machine insertion.

The sealed construction not only allows post-soldering washing but also enhances process reliability by mitigating risks from flux contamination. Panasonic provides full dimensional details for tape, reel, and relay body, enabling precise feeder configuration in automated assembly lines.

Alternative or Substitute Models for TX2SA-3V-Z

Given that the TX2SA-3V-Z has been partly discontinued as of August 31, 2011, engineers and procurement agents should review Panasonic’s broader TX relay series for suitable replacements. Within the TX series, alternate coil voltages or terminal types can often serve as drop-in substitutions, especially when observing contact ratings, mounting format, and environmental characteristics. AgPd-contact variants and SX relays should be considered for low-level load signal switching, with careful verification of compatibility regarding pin layout, switching voltage/current, and mechanical profile.

Conclusion

The Panasonic Electric Works TX2SA-3V-Z exemplifies a robust, compact, and highly reliable DPDT relay, well-suited to the stringent demands of telecoms, instrumentation, and various industrial applications. Its broad suite of features—including high breakdown voltage, low power operation, and multiple assembly options—provide engineers with the flexibility to optimize their designs for performance and manufacturability. As the industry evolves, those seeking replacements or equivalents should scrutinize the TX relay series to ensure continued reliability in both legacy and next-generation systems.