TE Connectivity D3045 Telecom Relay DPDT 9V Equivalent & Substitute Parts

Part Overview

The TE Connectivity Potter & Brumfield D3045 is a telecom-grade DPDT (2 Form C) relay with 9VDC coil voltage and 2A contact rating, designed for through-hole mounting applications. This part operates with a latching, single-coil configuration and features palladium, ruthenium, and gold contact materials for reliable switching performance across telecom systems.

The D3045 carries an obsolete product status. Identifying equivalent substitute parts ensures design continuity and maintains supply chain reliability for applications currently utilizing this relay. Substitute parts must maintain electrical compatibility across coil voltage, contact form, coil current, coil resistance, and operating voltage parameters while accommodating differences in contact rating and switching voltage specifications.

Substiute Parts

D3045

TE Connectivity Potter & Brumfield RelaysIn Stock: 693D3045 Datasheet

Current PartRFQ

TQ2-L-9V

Panasonic Electric WorksIn Stock: 863TQ2-L-9V Datasheet

SimilarRFQ

TQ2H-L-9V

Panasonic Electric WorksIn Stock: 1088TQ2H-L-9V Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the D3045 are identified based on strict electrical and mechanical compatibility criteria. The following parameters must align between the main part and substitute candidates:

Critical Matching Parameters:

• Coil Voltage: 9VDC
• Contact Form: DPDT (2 Form C)
• Coil Current: 11.1 mA
• Coil Resistance: 810 Ohms
• Must Operate Voltage: 6.75 VDC
• Mounting Type: Through Hole
• Termination Style: PC Pin
• Relay Type: Telecom
• Coil Type: Latching, Single Coil

Parameters Permitting Variation:

• Contact Rating (Current): Substitute parts may have lower current ratings if application requirements allow
• Switching Voltage: Substitute parts may have lower maximum switching voltage if application requirements allow
• Operating Temperature Range: Substitute parts may have narrower temperature ranges if application requirements allow
• Operate/Release Time: Substitute parts may have faster response times
• Contact Material: Substitute parts may use alternative precious metal compositions

The Panasonic Electric Works TQ2-L-9V and TQ2H-L-9V relays satisfy all critical matching parameters and function as direct substitutes for the D3045 in applications where the lower 1A contact rating and reduced switching voltage specifications are acceptable.

Parameter Comparison

Engineering Selection Recommendations

Panasonic Electric Works TQ2-L-9V and TQ2H-L-9V

Both Panasonic Electric Works TQ series relays (TQ2-L-9V and TQ2H-L-9V) are active products suitable for replacing the obsolete D3045. These substitutes maintain identical coil voltage, contact form, coil current, coil resistance, and must-operate voltage specifications, ensuring direct functional compatibility in existing circuit designs.

The TQ2-L-9V and TQ2H-L-9V differ in contact rating and switching voltage specifications. The D3045 supports 2A at 250VAC/220VDC maximum, while both Panasonic substitutes support 1A at 125VAC/110VDC maximum. Applications operating below these reduced ratings experience no functional impact. Applications requiring the full 2A contact rating or higher switching voltage specifications require alternative evaluation.

Both Panasonic substitutes operate across the -40°C to 70°C temperature range, which encompasses the lower portion of the D3045 operating range (-40°C to 85°C). Applications requiring operation above 70°C require alternative evaluation.

The Panasonic substitutes feature faster operate and release times (3 ms versus 20 ms), providing improved switching response. Both parts carry active product status, ensuring long-term availability and supply chain continuity. The TQ2H-L-9V carries RoHS Compliance certification, while the TQ2-L-9V carries RoHS3 Compliance certification. Both maintain REACH Unaffected status and EAR99 export classification consistent with the D3045.

Frequently Asked Questions (FAQ)

Q: Can the TQ2-L-9V or TQ2H-L-9V directly replace the D3045 in all applications?

A: Direct replacement is possible only in applications where the contact rating does not exceed 1A and the switching voltage does not exceed 125VAC or 110VDC. The D3045 supports 2A at 250VAC/220VDC maximum. Applications operating at higher current or voltage levels require alternative evaluation.

Q: What is the difference between the TQ2-L-9V and TQ2H-L-9V?

A: Both relays share identical electrical specifications, coil voltage, contact form, coil current, and coil resistance. The primary difference is RoHS compliance certification: TQ2H-L-9V carries RoHS Compliance, while TQ2-L-9V carries RoHS3 Compliance. Selection between these parts depends on specific regulatory requirements for the application.

Q: Do the Panasonic substitutes maintain the same operating temperature range as the D3045?

A: No. The D3045 operates across -40°C to 85°C, while both Panasonic substitutes operate across -40°C to 70°C. Applications requiring operation above 70°C require alternative evaluation.

Q: Are the operate and release times different between the D3045 and Panasonic substitutes?

A: Yes. The D3045 operates and releases in 20 ms, while both Panasonic substitutes operate and release in 3 ms. The faster response time of the Panasonic substitutes does not create compatibility issues in applications designed for the D3045, as faster switching is generally beneficial. Applications with timing-critical requirements should confirm that the faster response time does not introduce unintended behavior.

Q: What contact materials are used in the substitute relays?

A: The D3045 uses palladium, ruthenium, and gold contact materials. The Panasonic TQ2-L-9V and TQ2H-L-9V use silver and gold contact materials. Both compositions provide reliable switching performance in telecom applications.

Q: Are the substitute relays available in the same packaging as the D3045?

A: The D3045 packaging information is not specified in the provided data. The Panasonic substitutes are supplied in tube packaging. Confirm packaging compatibility with your procurement and assembly requirements.

Q: Do the substitute relays maintain the same coil resistance and current specifications?

A: Yes. Both Panasonic substitutes maintain 810 Ohms coil resistance and 11.1 mA coil current, identical to the D3045. The must-operate voltage of 6.75 VDC is also maintained across all three relays.

Q: What is the inventory status of the substitute parts?

A: The TQ2-L-9V has 846 pieces in stock, and the TQ2H-L-9V has 1,013 pieces in stock. Both are active products with established supply availability.