SZR-LY4-1P-DC24V Equivalent & Substitute Parts

Part Overview

The SZR-LY4-1P-DC24V is a general purpose relay manufactured by Honeywell Sensing and Productivity Solutions. This 4PDT (4 Form C) relay operates on a 24VDC coil and is rated for 10A switching capacity. The product is currently classified as obsolete, making identification of equivalent and substitute parts essential for system maintenance, repair, and redesign applications where continued component availability is required.

Substiute Parts

SZR-LY4-1P-DC24V

Honeywell Sensing and Productivity SolutionsIn Stock: 1117SZR-LY4-1P-DC24V Datasheet

Current PartRFQ

LY4-0-DC24

Omron Automation and SafetyIn Stock: 1403LY4-0-DC24 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SZR-LY4-1P-DC24V is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

• Coil voltage: 24VDC (exact match required)
• Contact form: 4PDT (4 Form C) configuration
• Contact current rating: 10 A minimum
• Switching voltage capability: 250VAC, 125VDC - Max
• Coil current: 69 mA
• Coil resistance: 350 Ohms
• Must operate voltage: 19.2 VDC
• Must release voltage: 2.4 VDC
• Operate and release time: 25 ms each

Mechanical Equivalence Requirements:

• Mounting type: Through Hole
• Termination style: PC Pin
• Coil type: Non Latching

The LY4-0-DC24 manufactured by Omron Automation and Safety meets all specified electrical and mechanical parameters, establishing it as a direct substitute for the obsolete SZR-LY4-1P-DC24V.

Parameter Comparison

Engineering Selection Recommendations

The LY4-0-DC24 from Omron Automation and Safety is the direct substitute for the obsolete SZR-LY4-1P-DC24V. Selection is based on the following factors:

Product Status: The SZR-LY4-1P-DC24V is obsolete, while the LY4-0-DC24 maintains active product status with confirmed inventory availability (1365 pcs in stock).

Electrical and Mechanical Compatibility: All critical operating parameters are identical, including coil voltage, contact configuration, current rating, switching voltage, timing characteristics, and mounting specifications. Direct pin-for-pin substitution is supported.

Regulatory Compliance: Both parts maintain RoHS compliance. The LY4-0-DC24 carries ROHS3 certification and REACH Unaffected status, meeting current regulatory requirements. The SZR-LY4-1P-DC24V is RoHS Compliant.

Contact Material Difference: The SZR-LY4-1P-DC24V uses Silver Cadmium Oxide (AgCdO) contacts, while the LY4-0-DC24 uses Silver Alloy contacts. Both materials are suitable for the specified 10A switching application at 250VAC and 125VDC maximum switching voltages.

Packaging and Availability: The LY4-0-DC24 is supplied in bulk packaging with active inventory status, ensuring supply chain continuity for production and maintenance applications.

Frequently Asked Questions (FAQ)

Q: Can the LY4-0-DC24 be used as a direct replacement for the SZR-LY4-1P-DC24V?

A: Yes. The LY4-0-DC24 is electrically and mechanically equivalent to the SZR-LY4-1P-DC24V across all specified parameters, including coil voltage, contact form, current rating, switching voltage, timing, and mounting configuration. Direct substitution is supported.

Q: What is the difference in contact material between these two relays?

A: The SZR-LY4-1P-DC24V uses Silver Cadmium Oxide (AgCdO) contacts, while the LY4-0-DC24 uses Silver Alloy contacts. Both materials are rated for the same switching voltage and current specifications (250VAC, 125VDC, 10A). The contact material difference does not affect functional compatibility in this application.

Q: Why is the SZR-LY4-1P-DC24V classified as obsolete?

A: Product obsolescence is determined by manufacturer discontinuation. The SZR-LY4-1P-DC24V has been discontinued by Honeywell Sensing and Productivity Solutions. The LY4-0-DC24 remains in active production by Omron Automation and Safety.

Q: Are there any differences in regulatory compliance between the two parts?

A: Both parts are RoHS compliant. The LY4-0-DC24 carries ROHS3 certification and REACH Unaffected status, meeting current regulatory standards. The SZR-LY4-1P-DC24V is RoHS Compliant. Both parts carry EAR99 ECCN classification.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution is determined by equivalence in coil voltage (24VDC), contact form (4PDT), current rating (10A), switching voltage (250VAC/125VDC), coil current (69mA), coil resistance (350Ω), operating voltages (19.2VDC operate, 2.4VDC release), timing (25ms operate/release), mounting type (Through Hole), and termination style (PC Pin).

Q: Is the LY4-0-DC24 available in the same packaging as the SZR-LY4-1P-DC24V?

A: The LY4-0-DC24 is supplied in bulk packaging. Packaging format may differ from the original SZR-LY4-1P-DC24V. Confirm packaging requirements with your procurement specifications.

Q: What is the coil resistance of both relays?

A: Both the SZR-LY4-1P-DC24V and LY4-0-DC24 have a coil resistance of 350 Ohms, ensuring equivalent electrical behavior in circuit applications.