TQ2SS-4.5V-Y Telecom Relay Equivalent & Substitute Parts

Part Overview

The TQ2SS-4.5V-Y is a Surface Mount Telecom Relay manufactured by Panasonic Electric Works, classified as a DPDT (Double Pole Double Throw) switching device with a 4.5VDC coil voltage and 2A contact rating. This relay is designed for telecom applications requiring non-latching operation with fast switching response. The part maintains Active product status with 802 units currently in stock.

Substitute parts are identified when equivalent electrical and mechanical parameters allow direct functional replacement in circuit designs without modification to PCB layout, coil drive circuitry, or contact load specifications.

Substiute Parts

TQ2SS-4.5V-Y

Panasonic Electric WorksIn Stock: 882TQ2SS-4.5V-Y Datasheet

Current PartRFQ

TQ2SL-4.5V

Panasonic Electric WorksIn Stock: 1926TQ2SL-4.5V Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TQ2SS-4.5V-Y is determined by strict equivalence across the following critical parameters:

Electrical Parameters (Must Match Exactly):

• Coil Voltage: 4.5VDC
• Contact Form: DPDT (2 Form C)
• Contact Rating: 2 A
• Switching Voltage: 125VAC, 220VDC - Max
• Coil Current: 31 mA
• Coil Type: Non Latching
• Must Operate Voltage: 3.38 VDC
• Must Release Voltage: 0.45 VDC
• Operate Time: 4 ms
• Release Time: 4 ms
• Coil Resistance: 145 Ohms

Mechanical Parameters (Must Match Exactly):

• Mounting Type: Surface Mount
• Termination Style: Gull Wing
• Operating Temperature Range: -40°C ~ 85°C
• Contact Material: Silver Nickel (AgNi), Gold (Au)

Functional Classification:

• Relay Type: Telecom
• Coil Type: Non Latching

The TQ2SL-4.5V qualifies as a parametric equivalent substitute because all electrical, mechanical, and functional parameters are identical to the TQ2SS-4.5V-Y.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: TQ2SS-4.5V-Y

The TQ2SS-4.5V-Y is the specified part number for this application. Current inventory status shows 802 units in stock. Product status is Active, indicating ongoing manufacturer support and availability.

Alternative Selection: TQ2SL-4.5V

The TQ2SL-4.5V is a parametric equivalent substitute with identical electrical and mechanical specifications. This part is also manufactured by Panasonic Electric Works with Active product status. Inventory availability is higher at 1828 units in stock.

Compliance Considerations:

The TQ2SL-4.5V substitute carries the following compliance certifications:

• RoHS3 Compliant
• REACH Unaffected
• ECCN: EAR99
• HTSUS: 8536.41.0020

Both parts are suitable for direct substitution in Surface Mount PCB applications requiring DPDT telecom relay functionality at 4.5VDC coil voltage with 2A contact rating.

Frequently Asked Questions (FAQ)

Q: Can TQ2SL-4.5V replace TQ2SS-4.5V-Y in existing designs?

A: Yes. The TQ2SL-4.5V is a parametric equivalent with identical coil voltage (4.5VDC), contact form (DPDT), contact rating (2A), switching voltage (125VAC, 220VDC), coil current (31 mA), timing specifications (4 ms operate/release), operating temperature range (-40°C ~ 85°C), and termination style (Gull Wing). No circuit modifications are required.

Q: Are there differences in the part numbers?

A: The part numbers differ (TQ2SS-4.5V-Y versus TQ2SL-4.5V), but both are Panasonic Electric Works telecom relays within the TQ series. The suffix variations indicate different internal series designations (TQ versus TQ-SMD), but electrical and mechanical parameters are identical.

Q: What is the coil resistance specification?

A: Both parts have a coil resistance of 145 Ohms at 4.5VDC. This specification determines the coil current draw of 31 mA and must be matched for proper driver circuit operation.

Q: Are the contact materials the same?

A: Yes. Both parts use Silver Nickel (AgNi) and Gold (Au) contact materials, ensuring equivalent contact reliability and switching performance across the 125VAC and 220VDC maximum switching voltage range.

Q: What are the switching time specifications?

A: Both parts have identical operate time and release time of 4 ms each. The must-operate voltage is 3.38 VDC and must-release voltage is 0.45 VDC.

Q: Is inventory availability a factor in selection?

A: The TQ2SL-4.5V substitute has higher inventory availability (1828 units) compared to the TQ2SS-4.5V-Y (802 units). Both parts are Active status products from the same manufacturer.

Q: Can these relays be used in high-temperature applications?

A: Both parts are rated for operating temperatures from -40°C to 85°C. Applications requiring operation outside this range require alternative part selection.