JS1A-F-24V-F General Purpose Relay Equivalent & Substitute Parts

Part Overview

The JS1A-F-24V-F is a general purpose relay manufactured by Panasonic Electric Works, configured as a SPST-NO (1 Form A) with a 24VDC coil and 10A contact rating. This through-hole mounted relay is designed for general switching applications with a sealed, fully enclosed construction and Class F coil insulation.

The JS1A-F-24V-F is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for systems utilizing this relay.

Substiute Parts

JS1A-F-24V-F

Panasonic Electric WorksIn Stock: 829JS1A-F-24V-F Datasheet

Current PartRFQ

ALQ3F24

Panasonic Electric WorksIn Stock: 852ALQ3F24 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the JS1A-F-24V-F is evaluated based on the following critical parameters:

• Coil voltage matching (24VDC)
• Contact form compatibility (SPST-NO)
• Mounting type (Through Hole with PC Pin termination)
• Coil type (Non Latching)
• Operating temperature range capability
• Coil insulation class (Class F minimum)

The ALQ3F24 shares the primary functional characteristics of the JS1A-F-24V-F: identical coil voltage, contact form, mounting type, termination style, and coil insulation class. However, differences exist in contact rating, switching voltage limits, and operating temperature range, which must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The ALQ3F24 is an active product from Panasonic Electric Works and represents a viable substitute for the obsolete JS1A-F-24V-F in applications where the following conditions are met:

• Load current does not exceed 5A (ALQ3F24 contact rating)
• DC switching voltage does not exceed 30VDC (ALQ3F24 switching voltage limit)
• Operating temperature range requirement does not exceed 85°C upper limit
• Switching speed tolerance allows for 20ms operate and release times (versus 10ms for the original)
• Coil voltage supply can accommodate the higher must-operate voltage of 18VDC

The ALQ3F24 offers improved compliance status (ROHS3) and lower coil current draw (8.3mA versus 15mA), which may provide advantages in power-constrained applications. Both relays maintain Class F coil insulation and sealed construction.

Applications requiring the full 10A contact rating, 100VDC switching capability, or extended temperature operation to 105°C cannot use the ALQ3F24 as a direct substitute and require alternative solutions.

Frequently Asked Questions (FAQ)

Q: Can the ALQ3F24 directly replace the JS1A-F-24V-F in all applications?

A: No. The ALQ3F24 has a reduced contact rating (5A versus 10A) and lower maximum DC switching voltage (30VDC versus 100VDC). Substitution is valid only when application load current and switching voltage remain within ALQ3F24 specifications.

Q: What is the impact of the different contact materials (AgSnO versus AgNi)?

A: Contact material differences affect arc erosion characteristics and contact resistance behavior. Both materials are suitable for general purpose switching; however, application-specific load characteristics should be evaluated.

Q: Why does the ALQ3F24 have a longer operate and release time?

A: The ALQ3F24 operates at 20ms for both operate and release cycles, compared to 10ms for the JS1A-F-24V-F. Applications with timing-critical switching requirements must account for this difference.

Q: Are both relays compatible with the same PCB footprint?

A: Both relays use through-hole PC pin termination and are manufactured by the same supplier. Physical compatibility should be confirmed through dimensional drawings, as footprint differences may exist despite identical termination style.

Q: What is the significance of the different must-operate voltages (16.8VDC versus 18VDC)?

A: The ALQ3F24 requires a higher minimum coil voltage to operate reliably. In systems with marginal supply voltage, this difference may affect relay performance. Coil voltage supply must be verified to meet the 18VDC minimum for the ALQ3F24.

Q: Does the lower operating temperature maximum of the ALQ3F24 affect suitability?

A: The ALQ3F24 is rated to 85°C maximum, while the JS1A-F-24V-F operates to 105°C. Applications in high-temperature environments must confirm that ambient and self-heating conditions remain within the 85°C limit.