TE Connectivity Potter & Brumfield D3405 Telecom Relay DPDT Equivalent & Substitute Parts

Part Overview

The TE Connectivity Potter & Brumfield D3405 is a telecom relay with DPDT (2 Form C) contact configuration rated for 2A at 9VDC coil voltage. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing procurement and system maintenance. The D3405 operates through PC pin termination in a through-hole mounting configuration and is suitable for telecom switching applications requiring 250VAC and 220VDC maximum switching voltage ratings.

Substiute Parts

D3405

TE Connectivity Potter & Brumfield RelaysIn Stock: 1273D3405 Datasheet

Current PartRFQ

TX2-9V

Panasonic Electric WorksIn Stock: 2403TX2-9V Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the D3405 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Coil voltage: 9VDC
• Contact form: DPDT (2 Form C)
• Contact rating: 2 A minimum
• Mounting type: Through Hole
• Termination style: PC Pin
• Must operate voltage: 6.75 VDC
• Must release voltage: 0.9 VDC
• Relay type: Telecom
• Coil type: Non Latching

The Panasonic Electric Works TX2-9V satisfies all mandatory matching parameters and qualifies as a direct substitute. The TX2-9V maintains functional equivalence while offering active product status and improved operational characteristics in specific parameters.

Parameter Comparison

Engineering Selection Recommendations

The Panasonic Electric Works TX2-9V is the qualified substitute for the obsolete TE Connectivity Potter & Brumfield D3405. Selection of the TX2-9V is supported by the following factors:

Product Status: The TX2-9V maintains active product status, ensuring continued availability and supply chain reliability compared to the obsolete D3405.

Functional Equivalence: Both relays satisfy identical mandatory electrical parameters including 9VDC coil voltage, DPDT contact configuration, 2A contact rating, and matching operate/release voltage thresholds.

Compliance Certifications: Both components carry REACH Unaffected status and EAR99 ECCN classification. The TX2-9V additionally provides ROHS3 compliance, meeting current regulatory requirements for electronic components.

Operational Improvements: The TX2-9V demonstrates reduced coil current consumption (15.5 mA versus 33.3 mA) and faster switching response times (4 ms versus 5 ms), providing enhanced efficiency in telecom switching applications.

Environmental Considerations: The TX2-9V features fully sealed construction, offering improved protection in applications subject to moisture or contamination exposure. Operating temperature range of -40°C to 85°C covers the majority of standard industrial applications, with the D3405 extended lower temperature limit (-55°C) applicable only to specialized cryogenic or extreme cold environments.

Frequently Asked Questions (FAQ)

Q: Can the Panasonic TX2-9V directly replace the TE Connectivity D3405 in existing circuit designs?

A: Yes. The TX2-9V satisfies all mandatory electrical and mechanical parameters required for direct substitution. Both relays feature identical 9VDC coil voltage, DPDT contact configuration, 2A contact rating, through-hole mounting, and PC pin termination. Operate and release voltage thresholds are identical, ensuring compatible circuit behavior.

Q: What are the differences in switching voltage ratings between these two relays?

A: The D3405 supports 250VAC and 220VDC maximum switching voltage. The TX2-9V supports 220VDC maximum switching voltage. Applications requiring 250VAC switching capability must retain the D3405 or identify alternative components with equivalent 250VAC ratings.

Q: How do the coil current specifications affect circuit design?

A: The TX2-9V requires 15.5 mA coil current compared to 33.3 mA for the D3405. This 53% reduction in coil current consumption reduces power dissipation and heat generation in the relay coil. Existing driver circuits designed for the D3405 will operate the TX2-9V without modification, as the lower current requirement presents no compatibility issues.

Q: Are there temperature range limitations when substituting the TX2-9V?

A: The TX2-9V operates across -40°C to 85°C, compared to the D3405 range of -55°C to 85°C. Applications requiring operation below -40°C must retain the D3405 or identify alternative components with extended low-temperature specifications.

Q: What packaging differences exist between these relays?

A: The TX2-9V is supplied in tube packaging, while the D3405 packaging specification is not provided. Tube packaging is standard for through-hole relay components and presents no functional differences for circuit board assembly.

Q: Do the different contact materials affect relay performance?

A: The D3405 uses Palladium, Ruthenium, and Gold contact materials. The TX2-9V uses Silver and Gold contact materials. Both material compositions are suitable for telecom switching applications at 2A contact rating. Contact material selection does not affect functional substitution for standard switching applications.

Q: Is the TX2-9V fully sealed construction a requirement for substitution?

A: No. The TX2-9V fully sealed construction is an enhancement that provides additional environmental protection but is not required for functional equivalence. Applications in controlled environments may use either sealed or unsealed relay designs without performance impact.

Q: What is the significance of the TX2-9V ROHS3 compliance?

A: ROHS3 compliance indicates the TX2-9V meets current European Union Restriction of Hazardous Substances regulations. This certification supports procurement for applications subject to ROHS compliance requirements. The D3405 ROHS status is not specified.