D3401 Telecom Relay DPDT 2A 3V Equivalent & Substitute Parts

Part Overview

The D3401 is a telecom-grade double-pole double-throw (DPDT) relay manufactured by TE Connectivity Potter & Brumfield Relays, designed for 3VDC coil operation with 2A contact rating. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing design support and procurement continuity. The relay features through-hole PC pin termination and operates across an industrial temperature range of -55°C to 85°C.

Substiute Parts

D3401

TE Connectivity Potter & Brumfield RelaysIn Stock: 1028D3401 Datasheet

Current PartRFQ

TX2-3V

Panasonic Electric WorksIn Stock: 3405TX2-3V Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete D3401 with the active TX2-3V relay is based on electrical and mechanical parameter alignment within telecom relay specifications. The following parameters establish substitution validity:

Critical Matching Parameters:

• Coil voltage: 3VDC (identical)
• Contact form: DPDT (2 Form C) (identical)
• Contact rating: 2 A (identical)
• Mounting type: Through hole (identical)
• Termination style: PC pin (identical)
• Must operate voltage: 2.25 VDC (identical)
• Must release voltage: 0.3 VDC (identical)
• Coil type: Non latching (identical)
• Relay type: Telecom (identical)

Acceptable Parameter Variations:

• Switching voltage: D3401 supports 250VAC/220VDC maximum; TX2-3V supports 220VDC maximum. The TX2-3V operates within the D3401 specification envelope for DC switching applications.
• Operating temperature: D3401 operates -55°C to 85°C; TX2-3V operates -40°C to 85°C. The TX2-3V covers the upper temperature range with a reduced lower limit.
• Coil current: D3401 requires 100 mA; TX2-3V requires 46.7 mA. Lower coil current in TX2-3V represents improved efficiency without affecting switching performance.
• Operate/release time: D3401 specifies 5 ms; TX2-3V specifies 4 ms. Faster switching in TX2-3V is compatible with D3401 applications.

Parameter Comparison

Engineering Selection Recommendations

The TX2-3V relay from Panasonic Electric Works serves as the direct active equivalent for the obsolete D3401. Selection of TX2-3V is supported by the following factors:

Electrical Compatibility: All critical electrical parameters match or exceed D3401 specifications. The TX2-3V operates at identical coil voltage, contact form, contact rating, and switching thresholds. Reduced coil current (46.7 mA versus 100 mA) and faster switching times (4 ms versus 5 ms) represent performance improvements compatible with D3401 circuit designs.

Mechanical Compatibility: Through-hole mounting and PC pin termination are identical, enabling direct board-level substitution without layout modification.

Regulatory Compliance: TX2-3V holds ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements. Both parts carry EAR99 ECCN classification and identical HTSUS codes (8536.41.0020).

Environmental Considerations: TX2-3V features fully sealed construction, providing enhanced protection compared to the D3401. Operating temperature range of -40°C to 85°C covers standard industrial applications; applications requiring operation below -40°C require design review.

Product Availability: TX2-3V is active production status with confirmed inventory availability, ensuring procurement continuity for new designs and legacy system support.

Frequently Asked Questions (FAQ)

Q: Can TX2-3V directly replace D3401 in existing circuit boards?

A: Yes. TX2-3V provides direct electrical and mechanical compatibility. Identical coil voltage (3VDC), contact form (DPDT), contact rating (2A), mounting type (through hole), and termination style (PC pin) enable direct substitution without circuit modification.

Q: What is the impact of TX2-3V's lower coil current (46.7 mA vs. 100 mA)?

A: Lower coil current reduces power consumption and heat generation in the relay coil. This represents an improvement over D3401 specifications and does not compromise switching performance. Existing driver circuits designed for D3401 will operate TX2-3V without modification.

Q: Does TX2-3V support the same switching voltage as D3401?

A: TX2-3V supports 220VDC maximum switching voltage. D3401 supports 250VAC and 220VDC maximum. For DC switching applications, TX2-3V operates within D3401 specifications. Applications requiring 250VAC switching capability require alternative component selection.

Q: What is the significance of TX2-3V's faster switching time (4 ms vs. 5 ms)?

A: TX2-3V operates time and release time are faster than D3401. Faster switching is compatible with D3401 applications and may improve system response characteristics. No circuit modification is required.

Q: Is TX2-3V suitable for applications requiring operation below -40°C?

A: TX2-3V operates from -40°C to 85°C. D3401 operates from -55°C to 85°C. Applications requiring operation below -40°C must evaluate alternative components or implement thermal management strategies.

Q: What packaging format is TX2-3V supplied in?

A: TX2-3V is supplied in tube packaging. D3401 packaging format is not specified in available documentation. Confirm packaging requirements for automated assembly processes.

Q: Are there additional substitute options beyond TX2-3V?

A: TX2-3V is the primary active equivalent documented for D3401. The TX2-3V specification references additional Siemens part numbers (V23079A1008B301, V23079A2008B301) as secondary substitutes within the TX series family. Evaluation of these alternatives requires direct comparison against D3401 specifications.

Q: What compliance certifications apply to TX2-3V?

A: TX2-3V holds ROHS3 compliance, REACH unaffected status, and EAR99 ECCN classification. Both D3401 and TX2-3V share identical HTSUS code 8536.41.0020. Moisture sensitivity level is 1 (unlimited) for both parts.