TE Connectivity Potter & Brumfield D3404 Telecom Relay DPDT Equivalent & Substitute Parts

Part Overview

The TE Connectivity Potter & Brumfield D3404 is a telecom relay with DPDT (2 Form C) contact configuration rated for 2A at 6VDC coil voltage. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing procurement and system maintenance. The D3404 features through-hole mounting with PC pin termination, palladium, ruthenium, and gold contact materials, and operates across the temperature range of -55°C to 85°C. Substitution is required to ensure continued availability and supply chain continuity for applications utilizing this relay specification.

Substiute Parts

D3404

TE Connectivity Potter & Brumfield RelaysIn Stock: 734D3404 Datasheet

Current PartRFQ

TX2-6V

Panasonic Electric WorksIn Stock: 1282TX2-6V Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the D3404 is based on strict equivalence across the following critical parameters: relay type classification (telecom), contact form (DPDT/2 Form C), contact current rating (2A minimum), coil voltage (6VDC), mounting configuration (through hole), and termination style (PC pin). The substitute part TX2-6V from Panasonic Electric Works meets all mandatory electrical and mechanical criteria for direct substitution. Both parts operate as non-latching relays with identical coil voltage and contact form specifications. The TX2-6V maintains compatibility with the D3404 in applications requiring DPDT telecom relay functionality at 2A contact rating with 6VDC coil excitation and through-hole PC pin mounting.

Parameter Comparison

Engineering Selection Recommendations

The Panasonic Electric Works TX2-6V serves as the direct substitute for the obsolete TE Connectivity Potter & Brumfield D3404. Both relays satisfy identical electrical specifications for coil voltage, contact form, contact rating, and operating voltage thresholds. The TX2-6V is classified as active product status, ensuring ongoing availability and supply chain support. The TX2-6V demonstrates ROHS3 compliance, providing regulatory advantage for new designs and manufacturing environments subject to RoHS requirements. Both parts maintain REACH Unaffected status and EAR99 export classification. The TX2-6V exhibits lower coil current consumption (23.3 mA versus 50 mA) and faster switching response times (4 ms versus 5 ms), representing performance improvements in the substitute design. The operating temperature range of the TX2-6V extends to -40°C minimum, which is acceptable for applications not requiring the D3404's -55°C lower limit. The TX2-6V is packaged in tube format with sealed contact configuration, providing enhanced environmental protection compared to the D3404 specification.

Frequently Asked Questions (FAQ)

Q: Can the TX2-6V directly replace the D3404 in existing circuit designs?

A: Yes. The TX2-6V meets all mandatory electrical and mechanical parameters for direct substitution: identical 6VDC coil voltage, DPDT contact form, 2A contact rating, through-hole mounting, and PC pin termination. Both relays operate as non-latching devices with matching must-operate and must-release voltage thresholds.

Q: What are the differences in coil current between these relays?

A: The D3404 requires 50 mA coil current, while the TX2-6V requires 23.3 mA. This difference results from higher coil resistance in the TX2-6V (257 Ohms versus 120 Ohms). The lower coil current of the TX2-6V reduces power consumption in the drive circuit.

Q: Are there temperature range limitations when substituting the TX2-6V for the D3404?

A: The TX2-6V operates from -40°C to 85°C, compared to the D3404 range of -55°C to 85°C. Applications requiring operation below -40°C must retain the D3404 or identify alternative solutions. Applications within the -40°C to 85°C range encounter no temperature-related limitations.

Q: What is the significance of the TX2-6V sealed contact configuration?

A: The TX2-6V features fully sealed contacts, providing enhanced protection against moisture and environmental contamination compared to the D3404. This sealed design improves reliability in humid or corrosive environments.

Q: Does the TX2-6V meet RoHS compliance requirements?

A: Yes. The TX2-6V is ROHS3 compliant, meeting current Restriction of Hazardous Substances directives. The D3404 RoHS status is not specified in the available documentation.

Q: Are switching speed differences significant between the D3404 and TX2-6V?

A: The TX2-6V operates and releases 1 millisecond faster than the D3404 (4 ms versus 5 ms). This performance improvement is generally beneficial for switching applications but must be evaluated against specific circuit timing requirements.

Q: What is the maximum switching voltage for the TX2-6V?

A: The TX2-6V is rated for 220VDC maximum switching voltage. The D3404 supports 250VAC and 220VDC. Applications requiring 250VAC switching capability must retain the D3404 or identify alternative solutions.

Q: Are both relays classified under the same HTSUS code?

A: Yes. Both the D3404 and TX2-6V share HTSUS code 8536.41.0020, confirming classification as telecom relays for tariff and trade purposes.

Q: What packaging format is the TX2-6V supplied in?

A: The TX2-6V is supplied in tube packaging. The D3404 packaging format is not specified in the available documentation.