PSR-SPP-24DC/TS/SDOR4/4X1 Equivalent & Substitute Parts

Part Overview

The PSR-SPP-24DC/TS/SDOR4/4X1 is a 24VDC DIN rail-mounted relay manufactured by Phoenix Contact, featuring four normally open contacts (4PST-NO) with a 4A contact rating. This component is classified as Last Time Buy, indicating discontinued production. Identifying equivalent and substitute parts is essential for system continuity, maintenance planning, and procurement of replacement units for existing installations.

Substiute Parts

2986106

Phoenix ContactIn Stock: 11672986106 Datasheet

Current PartRFQ

1104983

Phoenix ContactIn Stock: 10011104983 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PSR-SPP-24DC/TS/SDOR4/4X1 is determined by the following critical parameters:

• Coil Voltage: 24VDC (must match exactly for direct circuit compatibility)
• Mounting Type: DIN Rail (mechanical form factor requirement)
• Termination Style: Spring Terminal (connection interface requirement)
• Contact Rating (Current): 4 A minimum (electrical load capacity)
• Switching Voltage: 250VAC, 250VDC maximum (voltage withstand capability)
• Series Compatibility: PSR series (manufacturer product line)

The substitute part PSR-SPP-24DC/TS/SDOR4/4X1 (MFR Part Number 1104983) is manufacturer-recommended and maintains compatibility across these core parameters. However, a functional difference exists in the contact configuration: the substitute provides 3PST-NO (3 Form A) instead of 4PST-NO (4 Form A), reducing the number of available switching contacts from four to three.

Parameter Comparison

Engineering Selection Recommendations

The PSR-SPP-24DC/TS/SDOR4/4X1 (Part Number 2986106) is designated Last Time Buy, making the identification of active alternatives critical for long-term system support. The manufacturer-recommended substitute, Part Number 1104983, is currently Active and maintains full electrical and mechanical compatibility across all core switching parameters.

Electrical Compatibility: Both parts operate at 24VDC with identical contact ratings (4 A) and switching voltage limits (250VAC, 250VDC maximum). The substitute includes an integrated diode feature, which provides transient suppression for inductive loads and represents an enhancement over the original design.

Mechanical Compatibility: Both parts mount on DIN rail and utilize spring terminal connections, ensuring direct mechanical interchangeability within existing panel installations.

Functional Consideration: The substitute provides three normally open contacts (3PST-NO) versus four on the original (4PST-NO). Applications requiring all four contact positions must evaluate whether three contacts satisfy the circuit requirements or if additional relay modules are necessary.

Compliance Status: Both parts meet RoHS requirements. The substitute carries ROHS3 certification, reflecting current regulatory standards. Both are classified as EAR99 for export control purposes.

Power Budget Impact: The substitute exhibits higher coil current (120 mA versus 74 mA) and power consumption (2.9W versus 1.8W). System power supplies must be verified to accommodate this increased demand.

Frequently Asked Questions (FAQ)

Q: Can Part Number 1104983 directly replace PSR-SPP-24DC/TS/SDOR4/4X1 in all applications?

A: Direct replacement is possible for applications requiring three or fewer normally open contacts. If the original circuit design uses all four contact positions, the substitute cannot fulfill this requirement without additional relay modules or alternative component selection.

Q: What is the significance of the integrated diode in the substitute part?

A: The diode provides transient voltage suppression when the relay coil de-energizes, protecting downstream circuitry from inductive kickback. This is a functional enhancement that does not affect compatibility but may improve system reliability in inductive load applications.

Q: Are there any power supply considerations when switching from the original to the substitute?

A: Yes. The substitute draws 120 mA at 24VDC (2.9W) compared to the original's 74 mA (1.8W). Verify that the system power supply has sufficient capacity to support the increased coil current without voltage sag.

Q: Do both parts use identical DIN rail mounting and terminal connections?

A: Yes. Both parts mount on standard DIN rail and use spring terminal connections, ensuring mechanical interchangeability within existing panel layouts.

Q: What is the difference between RoHS and ROHS3 compliance?

A: Both certifications restrict hazardous substances. ROHS3 represents the current regulatory standard with updated substance restrictions. Both parts meet environmental compliance requirements for EU and similar markets.

Q: Is the substitute part currently available for procurement?

A: Yes. Part Number 1104983 is classified as Active with 901 units in stock, ensuring availability for new orders and replacement procurement. The original part (2986106) is Last Time Buy with limited remaining inventory.