TE Connectivity Potter & Brumfield D3044 Telecom Relay DPDT 6V Equivalent & Substitute Parts

Part Overview

The TE Connectivity Potter & Brumfield D3044 is a telecom relay with DPDT (2 Form C) contact configuration, rated for 2A at 6VDC coil voltage. This component is classified as obsolete, necessitating identification of active equivalent parts for continued system support and new design implementations. The D3044 operates within the FP2 and AXICOM series and features latching single-coil architecture with PC pin termination for through-hole mounting applications.

Substiute Parts

D3044

TE Connectivity Potter & Brumfield RelaysIn Stock: 1284D3044 Datasheet

Current PartRFQ

TQ2-L-6V

Panasonic Electric WorksIn Stock: 808TQ2-L-6V Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the D3044 is determined by alignment of critical electrical and mechanical parameters within the telecom relay category. The primary substitution candidate is the Panasonic Electric Works TQ2-L-6V, which shares the following qualifying parameters:

Matching Parameters:

• Coil Voltage: 6VDC
• Contact Form: DPDT (2 Form C)
• Coil Current: 16.7 mA
• Coil Type: Latching, Single Coil
• Coil Resistance: 360 Ohms
• Must Operate Voltage: 4.5 VDC
• Mounting Type: Through Hole
• Termination Style: PC Pin
• Relay Type: Telecom
• Moisture Sensitivity Level (MSL): 1 (Unlimited)
• ECCN: EAR99

The TQ2-L-6V is an active product from Panasonic Electric Works, providing continuity for applications requiring the D3044 specification profile. Substitution is valid where the differences in contact rating, switching voltage, operating temperature range, and switching speed are compatible with application requirements.

Parameter Comparison

Engineering Selection Recommendations

The Panasonic Electric Works TQ2-L-6V serves as the primary active equivalent for the obsolete TE Connectivity Potter & Brumfield D3044. Selection of the TQ2-L-6V is appropriate for applications where the following conditions are met:

Application Current Requirements: The TQ2-L-6V contact rating of 1A is lower than the D3044 specification of 2A. Applications requiring continuous contact current above 1A are not suitable for substitution with the TQ2-L-6V.

Switching Voltage Requirements: The TQ2-L-6V maximum switching voltage of 125VAC and 110VDC is lower than the D3044 specification of 250VAC and 220VDC. Applications requiring switching of higher voltages must retain the D3044 or identify alternative parts rated for the required voltage levels.

Operating Temperature Range: The TQ2-L-6V operating temperature range of -40°C to 70°C is narrower than the D3044 range of -40°C to 85°C. Applications requiring operation above 70°C are not suitable for the TQ2-L-6V.

Switching Speed: The TQ2-L-6V operates and releases at 3 milliseconds compared to the D3044 specification of 20 milliseconds. This faster switching characteristic is compatible with applications designed for the D3044 and may provide performance improvement in timing-sensitive circuits.

Compliance Status: The TQ2-L-6V is RoHS Compliant and carries active product status, ensuring availability and ongoing manufacturer support. The D3044 carries REACH Unaffected status. Both parts are classified under ECCN EAR99.

Frequently Asked Questions (FAQ)

Q: Can the Panasonic TQ2-L-6V directly replace the TE Connectivity D3044 in all applications?

A: Direct substitution is valid only when application requirements align with the TQ2-L-6V specifications. The primary limiting factors are contact current rating (1A maximum for TQ2-L-6V versus 2A for D3044), maximum switching voltage (125VAC/110VDC for TQ2-L-6V versus 250VAC/220VDC for D3044), and operating temperature range (maximum 70°C for TQ2-L-6V versus 85°C for D3044). Applications operating within these constraints are compatible with the TQ2-L-6V.

Q: What is the significance of the coil resistance and coil current matching between these parts?

A: Identical coil resistance (360 Ohms) and coil current (16.7 mA) ensure that both relays present the same electrical load to the driving circuit. This matching eliminates the need for circuit redesign related to coil drive requirements and allows direct substitution from a power supply and control circuit perspective.

Q: Why does the TQ2-L-6V have faster switching times than the D3044?

A: The TQ2-L-6V operates and releases in 3 milliseconds compared to the D3044 specification of 20 milliseconds. This difference reflects different mechanical designs and is inherent to the respective relay architectures. The faster switching of the TQ2-L-6V is compatible with D3044 applications and does not create incompatibility.

Q: Are there packaging differences between the D3044 and TQ2-L-6V?

A: The D3044 is specified with dash packaging notation, while the TQ2-L-6V is supplied in tube packaging. Both parts feature identical through-hole mounting and PC pin termination, ensuring mechanical compatibility on printed circuit boards. Packaging differences relate to quantity and shipping configuration only.

Q: What contact material differences exist between these relays?

A: The D3044 uses Palladium (Pd), Ruthenium (Ru), and Gold (Au) contact materials, while the TQ2-L-6V uses Silver (Ag) and Gold (Au). Both material compositions are suitable for telecom relay applications. Contact material selection does not prevent substitution but reflects different manufacturer design approaches for contact durability and switching characteristics.

Q: Is the TQ2-L-6V suitable for applications requiring the full 2A contact rating of the D3044?

A: No. The TQ2-L-6V is rated for maximum 1A continuous contact current. Applications requiring contact current above 1A must retain the D3044 or identify alternative parts with 2A or higher contact ratings.

Q: Can the TQ2-L-6V be used in applications operating above 70°C?

A: No. The TQ2-L-6V operating temperature range extends to 70°C maximum. Applications requiring operation above 70°C must retain the D3044 or identify alternative parts rated for the required temperature range.

Q: What is the significance of the D3044 being classified as obsolete?

A: Obsolete classification indicates that the D3044 is no longer in active production by TE Connectivity. Existing inventory may be available through authorized distributors, but long-term availability is not guaranteed. The TQ2-L-6V, classified as active product, provides continuity for new designs and ongoing system support where application parameters permit substitution.