D3209 Telecom Relay DPDT 2A 5V Equivalent & Substitute Parts

Part Overview

The D3209 is a telecom-grade DPDT relay manufactured by TE Connectivity Potter & Brumfield Relays, designed for switching applications requiring 2A contact rating at 5VDC coil voltage. This component features through-hole mounting with PC pin termination and operates across the industrial temperature range of -40°C to 85°C. The D3209 is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing system support and new designs.

Substiute Parts

D3209

TE Connectivity Potter & Brumfield RelaysIn Stock: 1015D3209 Datasheet

Current PartRFQ

TXD2-5V

Panasonic Electric WorksIn Stock: 996TXD2-5V Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the D3209 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Coil voltage: 5VDC
• Contact form: DPDT (2 Form C)
• Contact rating: 2 A minimum
• Mounting type: Through hole
• Termination style: PC pin
• Operating temperature range: -40°C to 85°C minimum
• Coil type: Non latching

Acceptable Variation Parameters:

• Coil current: Higher values acceptable if circuit design accommodates
• Coil resistance: Variation acceptable within circuit tolerance
• Switching voltage: Equal or higher maximum rating acceptable
• Operate/release time: Variation acceptable within application timing requirements
• Seal rating: Enhanced sealing acceptable for equivalent or improved performance
• Contact material composition: Variation acceptable if electrical performance maintained

The TXD2-5V from Panasonic Electric Works satisfies all mandatory matching parameters and represents a direct functional equivalent for the obsolete D3209.

Parameter Comparison

Engineering Selection Recommendations

The TXD2-5V from Panasonic Electric Works is the direct functional equivalent for the obsolete D3209. Selection of this substitute is based on the following engineering criteria:

Product Status Alignment: The D3209 is classified as obsolete, while the TXD2-5V maintains active manufacturing status with ongoing supplier support and availability.

Regulatory Compliance: The TXD2-5V is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for new designs and system updates. The D3209 compliance status is not specified.

Electrical Equivalence: Both relays share identical coil voltage (5VDC), contact form (DPDT), contact rating (2A), and operating temperature range (-40°C to 85°C). These parameters ensure functional interchangeability in circuit applications.

Packaging and Mounting: Both components utilize through-hole mounting with PC pin termination, enabling direct mechanical substitution in existing PCB layouts without redesign.

Performance Variations: The TXD2-5V exhibits higher coil current (40 mA versus 28 mA) and lower coil resistance (125 Ohms versus 178 Ohms). Circuit designs must accommodate the increased coil current draw. The TXD2-5V requires a minimum operating voltage of 3.75 VDC compared to 3.5 VDC for the D3209, representing a 0.25V higher threshold. Release time is 1 ms longer (4 ms versus 3 ms). These variations are within acceptable engineering tolerances for general-purpose switching applications.

Environmental Protection: The TXD2-5V provides fully sealed construction, offering enhanced protection against moisture and contaminants compared to the D3209, which has no specified seal rating.

Switching Voltage Consideration: The D3209 supports 250VAC and 220VDC maximum switching voltage, while the TXD2-5V is rated for 220VDC maximum. Applications requiring 250VAC switching capability must retain the D3209 or identify alternative solutions.

Frequently Asked Questions (FAQ)

Q: Can the TXD2-5V directly replace the D3209 in existing circuit boards?

A: The TXD2-5V is mechanically and electrically compatible for direct substitution in most applications. Both relays feature identical through-hole mounting, PC pin termination, coil voltage, contact form, and contact rating. However, the circuit design must accommodate the TXD2-5V's higher coil current (40 mA versus 28 mA) and verify that the minimum operating voltage requirement of 3.75 VDC is met by the power supply.

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

A: The TXD2-5V requires 40 mA coil current with 125 Ohms coil resistance, compared to the D3209's 28 mA and 178 Ohms. The higher current draw of the TXD2-5V necessitates verification that the driving circuit can supply adequate current without exceeding component ratings. The lower coil resistance of the TXD2-5V results in faster response characteristics.

Q: Are there switching voltage limitations when substituting the TXD2-5V for the D3209?

A: Yes. The D3209 supports 250VAC and 220VDC maximum switching voltage, while the TXD2-5V is rated for 220VDC maximum. Applications requiring 250VAC switching capability cannot use the TXD2-5V as a substitute. For such applications, alternative relay solutions must be evaluated.

Q: How do the operating time specifications compare?

A: Both relays have identical operate time of 4 ms. The TXD2-5V has a release time of 4 ms compared to the D3209's 3 ms, representing a 1 ms difference. This variation is acceptable for most general-purpose switching applications but must be verified for time-critical circuit functions.

Q: What is the significance of the TXD2-5V's fully sealed construction?

A: The TXD2-5V features fully sealed construction, providing enhanced environmental protection against moisture, dust, and contaminants. The D3209 has no specified seal rating. For applications in harsh or humid environments, the TXD2-5V's sealed design offers improved reliability and longevity.

Q: Does the TXD2-5V meet current regulatory requirements?

A: Yes. The TXD2-5V is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards for electronic components. The D3209, being obsolete, does not have specified compliance status. New designs should utilize the TXD2-5V to ensure regulatory alignment.

Q: What is the minimum operating voltage difference between these relays?

A: The D3209 must operate at 3.5 VDC minimum, while the TXD2-5V requires 3.75 VDC minimum. This 0.25V difference must be considered in circuit designs with marginal power supply voltages. Both relays have identical must release voltage of 0.5 VDC.

Q: Are the contact materials compatible for the same applications?

A: The D3209 uses Palladium, Ruthenium, and Gold contact materials, while the TXD2-5V uses Silver and Gold. Both material compositions are suitable for general-purpose switching applications. Contact material selection affects performance in specific environments; applications with particular contact material requirements should be evaluated individually.