JS1-F-9V-F General Purpose Relay SPDT 9VDC Equivalent & Substitute Parts

Part Overview

The JS1-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. This through-hole mounted relay is designed for applications requiring reliable switching of AC and DC loads. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing system maintenance, repairs, and new designs requiring compatible functionality.

Substiute Parts

JS1-F-9V-F

Panasonic Electric WorksIn Stock: 1090JS1-F-9V-F Datasheet

Current PartRFQ

ALQ1F09

Panasonic Electric WorksIn Stock: 1913ALQ1F09 Datasheet

SimilarRFQ

SRUDH-SS-109D1,000

TE Connectivity Potter & Brumfield RelaysIn Stock: 1171SRUDH-SS-109D1,000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the JS1-F-9V-F is determined by the following critical parameters:

• Coil Voltage: Must be 9VDC to ensure direct compatibility with existing circuit designs
• Contact Form: Must be SPDT (1 Form C) to maintain switching functionality
• Mounting Type: Must be Through Hole to fit existing PCB layouts
• Termination Style: Must be PC Pin for direct connection compatibility
• Contact Rating (Current): Minimum 10 A required; higher ratings are acceptable for load capacity
• Switching Voltage: Must support at least 250VAC and 100VDC maximum switching capability

The substitute parts identified below meet these core requirements while offering active product status and improved availability compared to the obsolete JS1-F-9V-F.

Parameter Comparison

Engineering Selection Recommendations

ALQ1F09 (Panasonic Electric Works)

The ALQ1F09 is an active product from the same manufacturer as the JS1-F-9V-F, ensuring design continuity and proven reliability. It maintains identical coil voltage, contact form, and mounting specifications. However, the contact rating is reduced to 5 A, which limits its use to applications where the load current does not exceed 5 A. The maximum DC switching voltage is also reduced to 30VDC compared to the original 100VDC specification. This substitute is suitable for lower-current applications and offers superior availability with 1853 units in stock. RoHS3 compliance provides environmental regulatory alignment.

SRUDH-SS-109D1,000 (TE Connectivity Potter & Brumfield Relays)

The SRUDH-SS-109D1,000 is an active product offering enhanced contact rating of 12 A, exceeding the original 10 A specification. It maintains identical coil voltage, contact form, and mounting type. The maximum DC switching voltage is reduced to 28VDC. This substitute provides superior current handling capacity and faster release time (5 ms versus 10 ms). The sealed design with flux protection offers enhanced environmental protection. This option is recommended for applications requiring higher current capacity or improved environmental sealing. However, RoHS status is not applicable, which may affect regulatory compliance in certain markets.

Frequently Asked Questions (FAQ)

Q: Can ALQ1F09 be used as a direct replacement for JS1-F-9V-F?

A: ALQ1F09 is mechanically and electrically compatible for coil activation and contact switching. However, the reduced contact rating of 5 A versus 10 A limits its application to circuits with maximum load current of 5 A. The reduced DC switching voltage of 30VDC versus 100VDC also restricts its use in high-voltage DC applications. Verify your circuit's load current and switching voltage requirements before substitution.

Q: Can SRUDH-SS-109D1,000 be used as a direct replacement for JS1-F-9V-F?

A: SRUDH-SS-109D1,000 is mechanically and electrically compatible with identical coil voltage, contact form, and mounting specifications. The higher contact rating of 12 A provides additional current capacity. The reduced DC switching voltage of 28VDC versus 100VDC must be evaluated against your application requirements. The sealed design offers improved environmental protection compared to the original part.

Q: What are the key differences in switching voltage between these relays?

A: The JS1-F-9V-F supports 250VAC and 100VDC maximum switching. ALQ1F09 supports 250VAC and 30VDC maximum. SRUDH-SS-109D1,000 supports 240VAC and 28VDC maximum. Applications requiring DC switching above 30VDC cannot use ALQ1F09 or SRUDH-SS-109D1,000 without circuit redesign.

Q: How do the operating temperature ranges compare?

A: JS1-F-9V-F operates from -40°C to 105°C. ALQ1F09 operates from -40°C to 85°C. SRUDH-SS-109D1,000 operates from -30°C to 80°C. Applications requiring operation above 85°C cannot use the substitute parts without thermal management modifications.

Q: What is the difference in coil current between these relays?

A: JS1-F-9V-F requires 40 mA coil current. ALQ1F09 requires 44.4 mA. SRUDH-SS-109D1,000 requires 40 mA. The slightly higher coil current of ALQ1F09 may require verification of the driving circuit's current capacity.

Q: Are there packaging differences between these relays?

A: JS1-F-9V-F uses standard through-hole packaging. ALQ1F09 is supplied in box packaging. SRUDH-SS-109D1,000 packaging is not specified. All three use PC pin termination compatible with standard PCB through-hole layouts.

Q: What compliance certifications should I consider?

A: JS1-F-9V-F is RoHS Compliant. ALQ1F09 is ROHS3 Compliant with additional CQC, cURuus, and VDE approvals. SRUDH-SS-109D1,000 RoHS status is not applicable. Verify compliance requirements for your target market and application before final selection.