TE Connectivity Potter & Brumfield D3026 Telecom Relay DPDT Equivalent & Substitute Parts

Part Overview

The TE Connectivity Potter & Brumfield D3026 is a telecom relay with DPDT (2 Form C) contact configuration, rated for 2A at 12VDC coil voltage. This component is classified as obsolete, necessitating identification of equivalent substitute parts for ongoing system maintenance and new design implementations. The D3026 operates through a non-latching coil mechanism with PC pin termination suitable for through-hole mounting applications.

Substiute Parts

D3026

TE Connectivity Potter & Brumfield RelaysIn Stock: 919D3026 Datasheet

Current PartRFQ

TQ2-12V

Panasonic Electric WorksIn Stock: 12390TQ2-12V Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the D3026 is based on the following critical parameters that must align between the main part and substitute candidates:

Mandatory Matching Parameters:

• Contact Form: DPDT (2 Form C)
• Coil Voltage: 12VDC
• Mounting Type: Through Hole
• Termination Style: PC Pin
• Coil Type: Non Latching
• Relay Type: Telecom

Allowable Parameter Variations: Substitute parts may differ in contact current rating, switching voltage maximum, coil current draw, operate/release timing, operating temperature range, and contact material composition, provided the substitute meets or exceeds the application requirements of the original circuit design.

The Panasonic Electric Works TQ2-12V satisfies all mandatory matching parameters and qualifies as a functional equivalent for the obsolete D3026.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: Panasonic Electric Works TQ2-12V

The TQ2-12V is the designated equivalent for the obsolete D3026 based on matching contact form, coil voltage, mounting configuration, and termination style. The TQ2-12V holds active product status, ensuring continued availability and supply chain reliability.

Application Suitability Criteria:

The TQ2-12V is suitable for replacement in applications where:

• Contact current requirements do not exceed 1A
• Switching voltage requirements do not exceed 125VAC or 110VDC
• Operating temperature does not exceed 70°C
• Coil voltage is 12VDC
• DPDT switching functionality is required

Compliance Considerations:

Both the D3026 and TQ2-12V maintain RoHS compliance. The TQ2-12V meets the current ROHS3 standard, providing enhanced regulatory alignment for new designs and system updates. Both components carry MSL 1 rating, indicating unlimited moisture sensitivity protection requirements.

Electrical Parameter Deviations:

Applications originally designed for the D3026's 2A contact rating or 250VAC/220VDC switching capability require circuit-level evaluation before substitution with the TQ2-12V. The higher coil current draw (11.7 mA versus 6.7 mA) and increased minimum operating voltage (9 VDC versus 8.4 VDC) must be assessed against existing power supply and control circuit specifications.

Frequently Asked Questions (FAQ)

Q: Can the TQ2-12V directly replace the D3026 in all applications?

A: The TQ2-12V provides functional equivalence for the contact form, coil voltage, and mounting configuration. However, applications requiring the D3026's 2A contact rating or 250VAC/220VDC switching capability must be evaluated individually. The TQ2-12V is rated for 1A maximum contact current and 125VAC/110VDC maximum switching voltage.

Q: What is the impact of the different coil current specifications?

A: The TQ2-12V draws 11.7 mA compared to the D3026's 6.7 mA. Control circuits must supply sufficient current to the coil. Existing power supplies and drive circuits should be verified for adequate current capacity before substitution.

Q: Are there temperature range limitations with the TQ2-12V?

A: The TQ2-12V operates within -40°C to 70°C, compared to the D3026's -40°C to 85°C range. Applications requiring operation above 70°C are not suitable for TQ2-12V substitution.

Q: How do the contact materials differ between these relays?

A: The D3026 uses Palladium, Ruthenium, and Gold contact materials, while the TQ2-12V uses Silver and Gold. Contact material selection affects switching characteristics, contact resistance, and application suitability. Applications with specific contact material requirements should be evaluated.

Q: What is the significance of the different must-operate voltages?

A: The D3026 operates at 8.4 VDC minimum, while the TQ2-12V requires 9 VDC minimum. In low-voltage supply scenarios, the TQ2-12V may not reliably operate if the supply voltage drops below 9 VDC.

Q: Are both relays RoHS compliant?

A: Yes. The D3026 is RoHS Compliant, and the TQ2-12V is ROHS3 Compliant. Both meet environmental and hazardous substance restrictions. The TQ2-12V's ROHS3 compliance aligns with current regulatory standards.

Q: What packaging considerations apply to the TQ2-12V?

A: The TQ2-12V is supplied in tube packaging, compared to the D3026's standard packaging. Tube packaging is suitable for automated assembly processes and provides protection during storage and transport.

Q: Is the TQ2-12V available in sufficient quantity for production use?

A: The TQ2-12V maintains active product status with 12,300 pieces in stock, ensuring reliable supply availability for both prototype and production applications.