JS1F-F-9V-F General Purpose Relay SPDT 10A 9VDC Equivalent & Substitute Parts

Part Overview

The JS1F-F-9V-F is a general purpose relay manufactured by Panasonic Electric Works, featuring a Single Pole Double Throw (SPDT) contact configuration with a 9VDC coil and 10A contact rating. This through-hole mounted relay is designed for general switching applications with sealed flux protection and Class F coil insulation.

The JS1F-F-9V-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

JS1F-F-9V-F

Panasonic Electric WorksIn Stock: 1081JS1F-F-9V-F Datasheet

Current PartRFQ

ALQ1F09

Panasonic Electric WorksIn Stock: 1913ALQ1F09 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the JS1F-F-9V-F is evaluated based on the following critical parameters that must align for functional compatibility:

Primary Matching Criteria:

• Coil Voltage: 9VDC (exact match required)
• Contact Form: SPDT (1 Form C) (exact match required)
• Mounting Type: Through Hole (exact match required)
• Termination Style: PC Pin (exact match required)
• Coil Type: Non Latching (exact match required)

Secondary Compatibility Parameters:

• Contact Rating (Current): Minimum 10A required for equivalent operation
• Switching Voltage: Must support 250VAC and 100VDC maximum
• Operating Temperature Range: Must encompass application requirements
• Coil Insulation: Class F or equivalent
• RoHS Compliance: Required for modern supply chains

The ALQ1F09 matches all primary criteria and maintains functional compatibility with the JS1F-F-9V-F in applications where the secondary parameter differences are acceptable.

Parameter Comparison

Engineering Selection Recommendations

The ALQ1F09 is an active product from Panasonic Electric Works and serves as a functional substitute for the obsolete JS1F-F-9V-F in applications where the following conditions are met:

Acceptable for Direct Substitution When:

• Application current requirements do not exceed 5A (ALQ1F09 contact rating)
• DC switching voltage does not exceed 30VDC (ALQ1F09 maximum)
• Operating temperature range remains within -40°C to 85°C
• Slightly increased switching times (20 ms vs. 10 ms) are acceptable
• ROHS3 compliance is required or preferred over RoHS Compliant status

Not Suitable for Direct Substitution When:

• Application requires 10A contact rating
• Application requires DC switching above 30VDC
• Operating temperature exceeds 85°C
• Switching speed of 10 ms is critical to system performance

Both parts maintain identical coil voltage (9VDC), contact form (SPDT), mounting type (through hole), and termination style (PC Pin), ensuring mechanical and electrical interface compatibility. Both carry unlimited moisture sensitivity level (MSL 1) rating.

Frequently Asked Questions (FAQ)

Q: Can the ALQ1F09 directly replace the JS1F-F-9V-F in all applications?

A: No. The ALQ1F09 has a lower contact rating (5A vs. 10A) and reduced maximum DC switching voltage (30VDC vs. 100VDC). Substitution is valid only when application requirements fall within ALQ1F09 specifications.

Q: What are the key differences between these two relays?

A: The primary differences are contact rating (10A vs. 5A), maximum DC switching voltage (100VDC vs. 30VDC), operating temperature range (-40°C to 105°C vs. -40°C to 85°C), switching times (10 ms vs. 20 ms), and contact material (AgSnO vs. AgNi). All other functional parameters match.

Q: Are the coil specifications compatible?

A: Yes. Both relays use 9VDC coils with Class F insulation. Coil current differs slightly (40 mA vs. 44.4 mA) and coil resistance differs (225 Ohms vs. 202.5 Ohms), but both are within acceptable operating parameters for standard 9VDC relay circuits.

Q: Do both relays have the same physical footprint?

A: Both relays use through-hole mounting with PC pin termination, ensuring identical PCB interface compatibility. Packaging differs (original vs. box), but this does not affect circuit board installation.

Q: What compliance certifications apply to each relay?

A: The JS1F-F-9V-F is RoHS Compliant. The ALQ1F09 is ROHS3 Compliant and carries additional approvals (CQC, cURuus, VDE). Both are EAR99 classified and carry unlimited MSL rating.

Q: If my application requires 10A switching capability, what are my options?

A: The ALQ1F09 cannot be used for applications requiring 10A contact rating. Alternative relays with matching 9VDC coil voltage, SPDT contact form, and 10A or higher contact rating must be evaluated separately.