D3425 Telecom Relay DPDT 2A 9V Equivalent & Substitute Parts

Part Overview

The D3425 is a telecom-grade double-pole double-throw (DPDT) relay manufactured by TE Connectivity Potter & Brumfield Relays, designed for 9VDC coil operation with 2A contact rating. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing system support and new design implementations. The relay operates across industrial temperature ranges and utilizes palladium, ruthenium, and gold contact materials for reliable switching performance in telecom applications.

Substiute Parts

D3425

TE Connectivity Potter & Brumfield RelaysIn Stock: 836D3425 Datasheet

Current PartRFQ

TX2-9V

Panasonic Electric WorksIn Stock: 2403TX2-9V Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the D3425 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
• Coil type: Non Latching
• Relay type: Telecom
• Must operate voltage: 6.75 VDC
• Must release voltage: 0.9 VDC

The TX2-9V from Panasonic Electric Works satisfies all mandatory matching parameters, establishing it as a direct functional equivalent. Both relays operate identically within the specified voltage thresholds and switching requirements for telecom applications.

Parameter Comparison

Engineering Selection Recommendations

The TX2-9V relay from Panasonic Electric Works is the direct substitute for the obsolete D3425. Both components meet identical functional requirements across all critical switching and coil parameters essential for telecom relay applications.

Product Status Consideration: The D3425 is obsolete, while the TX2-9V maintains active manufacturing status with 2315 pieces in current inventory. This availability differential supports TX2-9V selection for new designs and ongoing system support.

Compliance Status: Both relays carry REACH Unaffected designation and EAR99 ECCN classification. The TX2-9V additionally holds RoHS3 compliance certification, providing enhanced environmental regulatory alignment for modern applications.

Performance Differential: The TX2-9V exhibits lower coil current consumption (15.5 mA versus 22.2 mA) and faster switching response (4 ms versus 5 ms for both operate and release times). These characteristics represent operational improvements over the D3425.

Temperature Range Limitation: The TX2-9V operating range extends to -40°C minimum, compared to the D3425 specification of -55°C. Applications requiring operation below -40°C require retention of the D3425 or identification of alternative sources.

Switching Voltage Consideration: The D3425 supports 250VAC maximum switching voltage, while the TX2-9V is rated to 220VDC maximum. Applications requiring 250VAC switching capability must evaluate this specification difference.

Frequently Asked Questions (FAQ)

Q: Can the TX2-9V directly replace the D3425 in existing circuit boards?

A: Yes. Both relays share identical coil voltage (9VDC), contact form (DPDT), current rating (2A), mounting type (Through Hole), and termination style (PC Pin). Physical footprint compatibility requires verification of pin spacing and package dimensions, but electrical substitution is direct.

Q: What is the primary reason to substitute the D3425?

A: The D3425 is classified as obsolete. The TX2-9V is an active product with current manufacturing and inventory availability, ensuring long-term supply chain continuity.

Q: Are there performance differences between these relays?

A: Yes. The TX2-9V operates with lower coil current (15.5 mA versus 22.2 mA) and faster switching times (4 ms versus 5 ms). These represent operational improvements. However, the TX2-9V has a narrower low-temperature operating range (-40°C minimum versus -55°C) and lower maximum AC switching voltage (220VDC versus 250VAC).

Q: Which applications require the D3425 over the TX2-9V?

A: Applications operating below -40°C or requiring 250VAC switching capability must retain the D3425 or identify alternative sources, as the TX2-9V does not meet these specifications.

Q: What is the packaging difference?

A: The D3425 packaging is not specified in available documentation. The TX2-9V is supplied in Tube packaging. Verify packaging requirements for your procurement and assembly processes.

Q: Do both relays meet current regulatory standards?

A: Both relays carry REACH Unaffected and EAR99 ECCN designations. The TX2-9V additionally holds RoHS3 compliance certification, providing enhanced environmental regulatory alignment.

Q: What is the coil resistance difference, and does it affect circuit design?

A: The D3425 has 405 Ohms coil resistance; the TX2-9V has 579 Ohms. This difference reflects different coil designs. Verify that existing drive circuits can supply the required 9VDC at the TX2-9V coil current specification (15.5 mA) before substitution.