D3422 Telecom Relay DPDT 2A 4.5V Equivalent & Substitute Parts

Part Overview

The D3422 is a telecom-grade double-pole double-throw (DPDT) relay manufactured by TE Connectivity Potter & Brumfield Relays, part of the FT2 and AXICOM series. This through-hole mounted relay operates at 4.5VDC with a 2A contact rating and is designed for telecom switching applications. The D3422 is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing system maintenance, repair, and new design implementations where legacy compatibility is required.

Substiute Parts

D3422

TE Connectivity Potter & Brumfield RelaysIn Stock: 1107D3422 Datasheet

Current PartRFQ

TX2-4.5V

Panasonic Electric WorksIn Stock: 3502TX2-4.5V Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the D3422 is determined by strict alignment of the following critical parameters:

Mandatory Matching Parameters:

• Coil Voltage: 4.5VDC
• Contact Form: DPDT (2 Form C)
• Contact Rating (Current): 2 A
• Mounting Type: Through Hole
• Termination Style: PC Pin
• Relay Type: Telecom
• Coil Type: Non Latching
• Must Operate Voltage: 3.38 VDC
• Must Release Voltage: 0.45 VDC

Allowable Variation Parameters:

• Coil Current: May vary within design tolerance
• Coil Resistance: May vary based on wire gauge and construction
• Operate Time and Release Time: May vary within acceptable switching performance windows
• Operating Temperature Range: May be narrower than the original specification
• Switching Voltage: May be equal to or exceed the original specification
• Contact Material: May differ while maintaining electrical performance
• Seal Rating: May be enhanced from the original specification
• Product Status: Active status preferred for ongoing availability

The TX2-4.5V manufactured by Panasonic Electric Works meets all mandatory matching parameters and qualifies as a direct substitute for the D3422.

Parameter Comparison

Engineering Selection Recommendations

The TX2-4.5V from Panasonic Electric Works is the qualified substitute for the D3422. Selection of this substitute is supported by the following factors:

Functional Equivalence: The TX2-4.5V maintains all critical electrical parameters required for direct substitution, including coil voltage, contact configuration, current rating, and switching thresholds.

Product Availability: The TX2-4.5V holds active product status with 3400 units in stock, ensuring reliable procurement compared to the obsolete D3422 with limited remaining inventory.

Regulatory Compliance: The TX2-4.5V carries ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements. Both parts share identical ECCN (EAR99) and HTSUS (8536.41.0020) classifications.

Enhanced Specifications: The TX2-4.5V provides sealed construction and fully sealed rating, offering improved environmental protection compared to the D3422. The lower coil current (31 mA versus 44.4 mA) reduces power consumption while maintaining identical switching performance.

Performance Characteristics: The TX2-4.5V demonstrates faster switching times (4 ms operate and release versus 5 ms), providing equivalent or superior performance in telecom switching applications.

Temperature Consideration: The TX2-4.5V operates across -40°C to 85°C, which covers the majority of standard industrial and telecom operating environments. Applications requiring the full -55°C lower temperature limit of the D3422 require specific evaluation.

Frequently Asked Questions (FAQ)

Q: Can the TX2-4.5V directly replace the D3422 in existing circuit boards?

A: Yes. The TX2-4.5V matches all mandatory electrical parameters and uses identical through-hole PC pin termination. Physical pin configuration and spacing are compatible for direct board-level substitution.

Q: What is the significance of the lower coil current in the TX2-4.5V?

A: The TX2-4.5V requires 31 mA compared to the D3422's 44.4 mA. This represents improved efficiency and reduced power dissipation in the coil circuit. Both parts operate at the same 4.5VDC voltage and maintain identical switching thresholds.

Q: Are there differences in contact material between these relays?

A: Yes. The D3422 uses Palladium (Pd), Ruthenium (Ru), and Gold (Au) contact materials, while the TX2-4.5V uses Silver (Ag) and Gold (Au). Both material compositions are suitable for telecom switching applications at 2A rating and 220VDC maximum switching voltage.

Q: Does the sealed construction of the TX2-4.5V affect compatibility?

A: No. The sealed construction of the TX2-4.5V provides enhanced environmental protection and does not affect electrical or mechanical compatibility. The sealed rating is an improvement over the D3422.

Q: What is the impact of the -40°C lower operating temperature limit on the TX2-4.5V?

A: The TX2-4.5V operates from -40°C to 85°C, compared to the D3422's -55°C to 85°C. For applications requiring operation below -40°C, the TX2-4.5V is not suitable. Standard telecom and industrial applications typically operate within the -40°C to 85°C range.

Q: Are both relays REACH compliant?

A: Yes. Both the D3422 and TX2-4.5V carry REACH Unaffected status, indicating compliance with REACH regulations.

Q: What is the packaging difference between these parts?

A: The D3422 is supplied in standard packaging (not specified), while the TX2-4.5V is supplied in tube packaging. Tube packaging is standard for through-hole component distribution and does not affect component functionality.

Q: Can the TX2-4.5V be used in new designs?

A: Yes. The TX2-4.5V is classified as active product status with full availability. It is suitable for new design implementations requiring 4.5VDC DPDT telecom relays with 2A contact rating.