D3242 Telecom Relay DPDT 2A 4.5V Equivalent & Substitute Parts

Part Overview

The D3242 is a telecom-grade DPDT (Double Pole Double Throw) relay manufactured by TE Connectivity Potter & Brumfield Relays, designed for 4.5VDC coil operation with 2A contact rating. This component features a latching, single-coil configuration with through-hole PC pin termination and operates across the temperature range of -40°C to 85°C.

The D3242 is classified as obsolete. Locating equivalent substitute parts is necessary to support ongoing maintenance, repair, and new design requirements where this relay specification remains applicable. Substitute parts must maintain functional compatibility across critical electrical and mechanical parameters while meeting current product availability and compliance standards.

Substiute Parts

D3242

TE Connectivity Potter & Brumfield RelaysIn Stock: 1680D3242 Datasheet

Current PartRFQ

TXD2-L-4.5V

Panasonic Electric WorksIn Stock: 1109TXD2-L-4.5V Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the D3242 is determined by strict alignment with the following critical parameters:

Mandatory Matching Parameters:

• Contact Form: DPDT (2 Form C)
• Coil Voltage: 4.5VDC
• Contact Rating (Current): 2 A
• Mounting Type: Through Hole
• Termination Style: PC Pin
• Coil Type: Latching, Single Coil
• Operating Temperature Range: -40°C ~ 85°C
• Must Operate Voltage: 3.38 VDC

Acceptable Variation Parameters:

• Coil Current: Variation permitted within design tolerance
• Coil Resistance: Variation permitted within design tolerance
• Release Time: Variation permitted within design tolerance
• Switching Voltage: Variation permitted if equal to or exceeds D3242 specification
• Contact Material: Variation permitted if composition differs
• Relay Type Classification: Variation permitted (Telecom vs. General Purpose)
• Product Status: Active status preferred for ongoing availability
• Seal Rating: Variation permitted
• RoHS Compliance: Variation permitted

The TXD2-L-4.5V manufactured by Panasonic Electric Works satisfies all mandatory matching parameters and qualifies as a direct substitute for the D3242.

Parameter Comparison

Engineering Selection Recommendations

TXD2-L-4.5V (Panasonic Electric Works) - Primary Substitute

The TXD2-L-4.5V is qualified as a direct substitute for the D3242 based on complete alignment of all mandatory electrical and mechanical parameters. This substitute part offers the following advantages:

• Product Status: Active manufacturing status ensures ongoing availability and supply chain continuity, addressing the obsolescence of the D3242.
• Compliance: RoHS Compliant certification provides regulatory alignment for applications subject to environmental compliance requirements.
• Functional Equivalence: Identical contact form, coil voltage, current rating, mounting configuration, and operating temperature range enable direct circuit-level substitution.
• Acceptable Parameter Variations: Differences in coil current (33.3 mA vs. 22.2 mA), coil resistance (135 Ohms vs. 203 Ohms), and release time (4 ms vs. 3 ms) remain within acceptable design tolerances for general-purpose and telecom relay applications.
• Packaging: Tube packaging format supports standard component handling and inventory management practices.

The TXD2-L-4.5V is suitable for direct replacement in applications currently utilizing the D3242 without circuit redesign or board-level modifications.

Frequently Asked Questions (FAQ)

Q: Can the TXD2-L-4.5V replace the D3242 in existing circuit designs?

A: Yes. The TXD2-L-4.5V meets all mandatory electrical and mechanical parameters required for direct substitution. Both relays feature identical DPDT contact configuration, 4.5VDC coil voltage, 2A contact rating, through-hole PC pin termination, and -40°C to 85°C operating temperature range. No circuit modifications are required.

Q: What is the significance of the difference in coil current between the D3242 (22.2 mA) and TXD2-L-4.5V (33.3 mA)?

A: The coil current difference reflects variation in coil design and resistance between manufacturers. The TXD2-L-4.5V requires higher coil current due to lower coil resistance (135 Ohms vs. 203 Ohms). Both parts operate at the same 4.5VDC coil voltage and must-operate voltage (3.38 VDC). Circuit power supply design must accommodate the higher current requirement of the substitute part.

Q: Does the 1 ms difference in release time (3 ms vs. 4 ms) affect circuit performance?

A: The release time difference is within acceptable design tolerance for relay applications. The TXD2-L-4.5V release time of 4 ms remains suitable for general-purpose and telecom switching applications. Applications with strict timing requirements must evaluate this parameter against specific circuit specifications.

Q: What is the advantage of the TXD2-L-4.5V being RoHS Compliant?

A: RoHS Compliance certification indicates the substitute part meets Restriction of Hazardous Substances directives, eliminating lead and other restricted materials. This certification is required for applications subject to environmental and regulatory compliance standards, particularly in European markets and regulated industries.

Q: Are there packaging differences between the D3242 and TXD2-L-4.5V?

A: The D3242 packaging format is not specified in available documentation. The TXD2-L-4.5V is supplied in tube packaging. Verify tube packaging compatibility with existing component handling, storage, and assembly processes before implementation.

Q: Can the TXD2-L-4.5V be used in telecom-specific applications originally designed for the D3242?

A: Yes. Although the TXD2-L-4.5V is classified as a general-purpose relay, it meets all electrical and mechanical specifications required for telecom relay applications. The contact material composition differs (Silver/Gold vs. Palladium/Ruthenium/Gold), but both compositions are suitable for telecom switching environments.

Q: What is the inventory status of the TXD2-L-4.5V?

A: The TXD2-L-4.5V is currently in active production with 1,076 pieces available in new original stock, providing reliable supply chain access compared to the obsolete D3242.