PSR-SPP-24DC/MXF4/4X1/2X2/B Equivalent & Substitute Parts

Part Overview

The PSR-SPP-24DC/MXF4/4X1/2X2/B is a 24VDC DIN rail-mounted relay manufactured by Phoenix Contact, configured as a 4PST-NO (4 Form A) switching device with 6A contact rating. This part is classified as obsolete, making identification of functionally equivalent alternatives necessary for system maintenance, repair, and redesign applications where continued availability cannot be guaranteed.

Substiute Parts

2903261

Phoenix ContactIn Stock: 8222903261 Datasheet

Current PartRFQ

1104972

Phoenix ContactIn Stock: 7541104972 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PSR-SPP-24DC/MXF4/4X1/2X2/B is constrained by the following critical parameters:

• Coil Voltage: 24VDC (fixed requirement)
• Mounting Type: DIN Rail (fixed requirement)
• Termination Style: Spring Terminal (fixed requirement)
• Contact Form: 4PST-NO configuration (determines switching capability)
• Contact Rating: 6A minimum (determines load capacity)
• Switching Voltage: 250VAC/250VDC maximum (determines application voltage range)

The identified substitute part, Phoenix Contact 1104972, operates on the same 24VDC coil voltage and shares DIN rail mounting with spring terminal termination. However, this substitute exhibits reduced contact form (3PST-NO vs. 4PST-NO) and significantly lower contact rating (1.6A vs. 6A), restricting its application to lower-current switching scenarios. The substitute is classified as active product status, ensuring continued availability and support.

Parameter Comparison

Engineering Selection Recommendations

Selection between the PSR-SPP-24DC/MXF4/4X1/2X2/B and substitute part 1104972 depends on application-specific load requirements:

Use PSR-SPP-24DC/MXF4/4X1/2X2/B (or equivalent 4PST-NO, 6A rated alternative) when:

• Four independent switching poles are required
• Load current exceeds 1.6A per contact
• Switching voltage range up to 250VAC/250VDC is required

Use 1104972 when:

• Three switching poles satisfy application requirements
• Load current does not exceed 1.6A per contact
• Operation is limited to 24VDC switching voltage
• Active product support and continued availability are priorities
• Lower coil power consumption (1.7W vs. 3W) is beneficial

Both parts share identical RoHS3 compliance status, MSL rating, and feature set (diode, lighted indicator), ensuring regulatory and environmental compatibility within their respective electrical ratings.

Frequently Asked Questions (FAQ)

Q: Can the 1104972 directly replace the PSR-SPP-24DC/MXF4/4X1/2X2/B in all applications?

A: No. The 1104972 has reduced contact form (3PST-NO vs. 4PST-NO) and significantly lower current rating (1.6A vs. 6A). Direct replacement is only possible in applications requiring three or fewer switching poles and load currents not exceeding 1.6A per contact.

Q: What is the primary limitation of the 1104972 as a substitute?

A: The contact rating of 1.6A is substantially lower than the original 6A specification. Additionally, switching voltage is limited to 24VDC nominal, whereas the original part supports up to 250VAC/250VDC. These reductions restrict the substitute to low-current, low-voltage switching applications.

Q: Are there mechanical compatibility concerns between these parts?

A: Both parts use DIN rail mounting with spring terminal termination, ensuring mechanical compatibility. However, the reduced number of switching poles (3 vs. 4) may require circuit redesign if all four poles of the original part are utilized.

Q: What is the significance of the product status difference?

A: The PSR-SPP-24DC/MXF4/4X1/2X2/B is obsolete, meaning Phoenix Contact no longer manufactures or supports this part. The 1104972 is active, ensuring continued availability, technical support, and supply chain reliability for new designs and maintenance applications.

Q: Do both parts meet the same regulatory standards?

A: Both parts are RoHS compliant and share identical MSL rating (1 - Unlimited). The 1104972 carries ROHS3 certification, representing the current RoHS standard revision. Both parts are suitable for applications requiring RoHS compliance.

Q: What are the coil power implications of substitution?

A: The 1104972 requires 1.7W coil power compared to 3W for the original part. This 43% reduction in power consumption may benefit applications with limited power budgets, though it reflects the lower overall electrical rating of the substitute.