TE Connectivity Potter & Brumfield D3407 Telecom Relay DPDT Equivalent & Substitute Parts

Part Overview

The TE Connectivity Potter & Brumfield D3407 is a telecom relay with DPDT (2 Form C) contact configuration rated for 2A at 24VDC coil voltage. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing production and maintenance applications. The D3407 operates through a non-latching coil mechanism with PC pin termination suitable for through-hole mounting on printed circuit boards.

Substiute Parts

D3407

TE Connectivity Potter & Brumfield RelaysIn Stock: 792D3407 Datasheet

Current PartRFQ

TX2-24V

Panasonic Electric WorksIn Stock: 3648TX2-24V Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the D3407 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Coil voltage: 24VDC
• Contact form: DPDT (2 Form C)
• Contact rating: 2 A minimum
• Mounting type: Through Hole
• Termination style: PC Pin
• Coil type: Non Latching
• Must operate voltage: 18 VDC minimum
• Must release voltage: 2.4 VDC maximum
• Relay type: Telecom

Acceptable Variation Parameters:

• Operating temperature range (substitute may have narrower range if minimum meets or exceeds -55°C and maximum meets or exceeds 85°C)
• Switching voltage (substitute must meet or exceed maximum switching voltage requirements)
• Coil current (lower values acceptable; higher values require circuit validation)
• Operate and release times (faster operation acceptable)
• Contact material composition (different precious metal combinations acceptable if electrical performance maintained)
• Seal rating (enhanced sealing acceptable)
• Product status (active status preferred for obsolete parts)

The Panasonic Electric Works TX2-24V satisfies all mandatory matching parameters and qualifies as a direct substitute for the D3407.

Parameter Comparison

Engineering Selection Recommendations

The Panasonic Electric Works TX2-24V is a qualified direct substitute for the TE Connectivity Potter & Brumfield D3407 based on the following engineering criteria:

Functional Equivalence: The TX2-24V maintains all critical electrical and mechanical parameters required for drop-in replacement. Coil voltage, contact configuration, current rating, mounting type, and termination style are identical to the D3407.

Operational Compatibility: Operating voltage thresholds (must operate at 18VDC, must release at 2.4VDC) are identical. The TX2-24V demonstrates faster switching times (4ms versus 5ms), which is compatible with existing circuit designs. The lower coil current (5.8mA versus 12.5mA) reduces power consumption without affecting relay function.

Environmental Considerations: The TX2-24V operates across -40°C to 85°C, which covers the upper temperature range of the D3407. Applications requiring operation below -40°C require evaluation of specific environmental requirements. The TX2-24V includes full sealing, providing enhanced protection compared to the D3407.

Regulatory Compliance: Both components are RoHS compliant. The TX2-24V carries ROHS3 compliance and REACH Unaffected status, meeting current regulatory requirements. The D3407, classified as obsolete, presents supply chain risk for new designs.

Availability: The TX2-24V is active production status with 3600 units in stock, compared to the D3407 obsolete status with limited remaining inventory.

Frequently Asked Questions (FAQ)

Q: Can the TX2-24V replace the D3407 in existing circuit boards?

A: Yes. The TX2-24V is a direct substitute with identical coil voltage (24VDC), contact configuration (DPDT), current rating (2A), mounting type (through hole), and termination style (PC pin). Physical footprint compatibility requires verification of pin spacing and body dimensions against the specific PCB layout.

Q: What is the difference in coil current between these relays?

A: The D3407 draws 12.5mA while the TX2-24V draws 5.8mA at 24VDC. The lower current consumption of the TX2-24V reduces power dissipation and heat generation. Existing driver circuits designed for the D3407 will operate the TX2-24V without modification, as the lower current requirement is within the capability of standard relay driver circuits.

Q: Are there temperature range limitations with the TX2-24V?

A: The TX2-24V operates from -40°C to 85°C, compared to the D3407 range of -55°C to 85°C. Applications requiring operation below -40°C must evaluate whether the narrower temperature range of the TX2-24V is acceptable for the specific deployment environment.

Q: How do the switching voltage ratings compare?

A: The D3407 is rated for 250VAC and 220VDC maximum switching voltage. The TX2-24V is rated for 220VDC maximum. Both relays meet the 220VDC requirement. Applications requiring 250VAC switching capability must retain the D3407 or identify alternative substitutes with higher AC voltage ratings.

Q: What is the significance of the different contact materials?

A: The D3407 uses Palladium, Ruthenium, and Gold contact materials. The TX2-24V uses Silver and Gold. Both material combinations are suitable for telecom relay applications. Contact material selection affects wear characteristics, contact resistance, and corrosion resistance. The TX2-24V's silver-gold combination is standard for telecom relays and provides equivalent performance for the specified 2A switching current.

Q: Does the TX2-24V require any circuit modifications?

A: No circuit modifications are required. The TX2-24V operates at identical coil voltage and switching thresholds. The faster switching times (4ms versus 5ms) and lower coil current are compatible with existing designs. Physical mounting verification is necessary to confirm PCB footprint compatibility.

Q: What is the packaging difference between these parts?

A: The D3407 is supplied in standard packaging (not specified in available data). The TX2-24V is supplied in tube packaging. Tube packaging is standard for through-hole relay components and does not affect electrical or mechanical performance.

Q: Is the TX2-24V suitable for new product designs?

A: Yes. The TX2-24V is active production status with full RoHS3 and REACH compliance, making it suitable for new designs. The D3407, classified as obsolete, is not recommended for new product development due to supply chain discontinuation.