D3241 Telecom Relay DPDT 2A 3V Equivalent & Substitute Parts

Part Overview

The D3241 is a telecom-grade DPDT (Double Pole Double Throw) relay manufactured by TE Connectivity Potter & Brumfield Relays, designed for 3VDC coil operation with 2A contact rating. This component features a latching, single-coil configuration with through-hole PC pin termination, suitable for telecom switching applications requiring 250VAC/220VDC maximum switching voltage.

The D3241 carries an obsolete product status. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for systems utilizing this relay specification.

Substiute Parts

D3241

TE Connectivity Potter & Brumfield RelaysIn Stock: 970D3241 Datasheet

Current PartRFQ

TXD2-L-3V

Panasonic Electric WorksIn Stock: 947TXD2-L-3V Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the D3241 is determined by strict alignment with the following critical parameters:

Mandatory Matching Parameters:

• Coil Voltage: 3VDC
• Contact Form: DPDT (2 Form C)
• Contact Rating (Current): 2 A
• Mounting Type: Through Hole
• Termination Style: PC Pin
• Operating Temperature Range: -40°C ~ 85°C
• Must Operate Voltage: 2.25 VDC

Compatible Variation Parameters:

• Switching Voltage: Substitute must meet or exceed 220VDC maximum (250VAC/220VDC is acceptable)
• Coil Current: Variation permitted within circuit design constraints
• Operate/Release Time: Variation permitted within application timing requirements
• Contact Material: Variation permitted (Palladium/Ruthenium/Gold vs. Silver/Gold)
• Relay Type Classification: Variation permitted (Telecom vs. General Purpose)
• Seal Rating: Variation permitted (unsealed to fully sealed)

The TXD2-L-3V from Panasonic Electric Works satisfies all mandatory matching parameters and operates within compatible variation ranges for this substitution category.

Parameter Comparison

Engineering Selection Recommendations

TXD2-L-3V Substitution Suitability:

The TXD2-L-3V from Panasonic Electric Works is a direct functional substitute for the obsolete D3241. This substitution is supported by:

1. Product Status Advantage: The TXD2-L-3V maintains active product status with ongoing manufacturer support, whereas the D3241 is obsolete. This ensures long-term availability and supply chain continuity.

2. Compliance Certification: The TXD2-L-3V carries RoHS Compliant certification, meeting modern regulatory requirements for electronic components in regulated industries and markets.

3. Electrical Equivalence: All critical electrical parameters align precisely: 3VDC coil voltage, DPDT contact configuration, 2A contact rating, 2.25VDC must-operate voltage, and identical operating temperature range (-40°C ~ 85°C).

4. Mechanical Compatibility: Through-hole mounting with PC pin termination ensures direct PCB integration without redesign.

5. Operational Timing: Operate time matches exactly at 4 ms. Release time variation (4 ms vs. 3 ms) falls within acceptable tolerance for telecom switching applications.

6. Enhanced Sealing: The TXD2-L-3V provides fully sealed construction, offering improved environmental protection compared to the unspecified seal rating of the D3241.

Design Consideration: The TXD2-L-3V exhibits higher coil current (50 mA vs. 33.3 mA) and lower coil resistance (60 Ohms vs. 90 Ohms). Circuit designs must verify that power supply capacity and drive circuitry accommodate this increased coil current requirement.

Frequently Asked Questions (FAQ)

Q: Can the TXD2-L-3V directly replace the D3241 without PCB modifications?

A: Yes. Both relays feature identical through-hole PC pin termination and mounting type. No PCB layout changes are required for mechanical installation.

Q: What is the significance of the coil current difference (33.3 mA vs. 50 mA)?

A: The TXD2-L-3V requires higher coil current due to its lower coil resistance (60 Ohms vs. 90 Ohms). The drive circuit and power supply must be verified to supply 50 mA at 3VDC without voltage sag. This is a design verification requirement, not a compatibility barrier.

Q: Does the contact material difference (Palladium/Ruthenium/Gold vs. Silver/Gold) affect switching performance?

A: Both contact material compositions are suitable for 2A switching at 220VDC maximum. The silver/gold composition of the TXD2-L-3V is standard for general-purpose relays and performs equivalently in this application class.

Q: Why is the TXD2-L-3V classified as "General Purpose" while the D3241 is "Telecom"?

A: Classification reflects manufacturer categorization and intended market segment. Functionally, both relays meet identical electrical and mechanical specifications for this 3VDC, 2A, DPDT application. The TXD2-L-3V performs all telecom relay functions required by the D3241 specification.

Q: Is the 1 ms release time difference (3 ms vs. 4 ms) significant?

A: For telecom switching applications, this 1 ms variation is negligible. Telecom systems typically operate with switching cycles measured in tens of milliseconds or longer. Verify application-specific timing requirements if sub-millisecond precision is critical.

Q: What advantage does RoHS compliance provide?

A: RoHS Compliant status ensures the TXD2-L-3V meets environmental and regulatory standards required in the European Union, China, and other regulated markets. This certification supports compliance documentation for systems subject to RoHS directives.

Q: Are both relays rated for the same switching voltage?

A: The D3241 is rated 250VAC/220VDC maximum. The TXD2-L-3V is rated 220VDC maximum. For 220VDC applications, both are equivalent. For 250VAC applications, verify that the TXD2-L-3V's 220VDC rating is acceptable for your specific AC switching requirements.

Q: What is the packaging difference between these relays?

A: The D3241 packaging is listed as "-" (unspecified). The TXD2-L-3V is supplied in Tube packaging. Both are through-hole components suitable for standard PCB assembly processes.

Q: Can I use the TXD2-L-3V in new designs, or only as a replacement for D3241?

A: The TXD2-L-3V is an active product suitable for both new designs and legacy replacements. Its active status, RoHS compliance, and full sealing make it the preferred choice for new development requiring 3VDC, 2A DPDT relay functionality.