ALFG1PF121 General Purpose Relay - Equivalent & Substitute Parts

Part Overview

The ALFG1PF121 is a general purpose relay manufactured by Panasonic Electric Works, configured as a single-pole single-throw normally open (SPST-NO) contact form with a 12VDC coil. This through-hole mounted relay is designed for switching applications up to 22A at 250VAC maximum, with a maximum switching load of 5500VA. The part is currently active in production with 993 pieces available in new original stock condition. Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across the same product series, ensuring functional interchangeability in circuit applications.

Substiute Parts

ALFG1PF121

Panasonic Electric WorksIn Stock: 1005ALFG1PF121 Datasheet

Current PartRFQ

ALFG1PF12

Panasonic Electric WorksIn Stock: 1164ALFG1PF12 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ALFG1PF121 is determined by strict equivalence across the following critical parameters:

• Contact form configuration (SPST-NO)
• Coil voltage rating (12VDC)
• Contact current rating (22A)
• Maximum switching voltage (250VAC)
• Mounting type (Through Hole)
• Termination style (PC Pin)
• Operating temperature range (-40°C ~ 60°C)
• Contact material composition (Silver Tin Oxide)
• Coil resistance (103 Ohms)
• Switching timing characteristics (Operate/Release times)
• Regulatory compliance (cURus, VDE approval)

The ALFG1PF12 qualifies as a parametric equivalent within the ALFG series, maintaining identical electrical specifications and mechanical form factor. Both parts share the same base product number (ALFG1P) and are manufactured by Panasonic Electric Works under identical design parameters.

Parameter Comparison

Engineering Selection Recommendations

Both the ALFG1PF121 and ALFG1PF12 are active production parts from Panasonic Electric Works with identical electrical and mechanical specifications. Selection between these parts should be based on inventory availability and supply chain requirements. The ALFG1PF12 currently has higher stock availability at 1120 pieces compared to 993 pieces for the ALFG1PF121. Both parts maintain cURus and VDE regulatory approvals, ROHS3 compliance, and identical performance characteristics across all switching and timing parameters. No functional differences exist between these parts for circuit design purposes.

Frequently Asked Questions (FAQ)

Q: Can ALFG1PF12 be used as a direct replacement for ALFG1PF121?

A: Yes. Both parts are parametric equivalents with identical coil voltage (12VDC), contact rating (22A), contact form (SPST-NO), switching voltage (250VAC maximum), and all timing specifications. They share the same base product number (ALFG1P) and are manufactured by Panasonic Electric Works under identical design parameters.

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

A: No. Both parts carry identical cURus and VDE approvals, maintain ROHS3 compliance, and share the same ECCN (EAR99) and HTSUS classifications.

Q: What determines substitution eligibility for ALFG series relays?

A: Substitution is determined by equivalence in contact form, coil voltage, current rating, switching voltage, mounting type, termination style, operating temperature range, contact material, coil resistance, and regulatory approvals. All these parameters must match exactly between the main part and substitute.

Q: Does packaging type affect substitution compatibility?

A: Both parts are supplied in bulk packaging. Packaging type does not affect electrical or mechanical compatibility for circuit applications.

Q: What is the significance of the coil resistance value (103 Ohms)?

A: The 103 Ohm coil resistance directly determines the coil current draw (117 mA at 12VDC) and is a critical parameter for circuit design. Identical coil resistance between ALFG1PF121 and ALFG1PF12 ensures equivalent power supply requirements and control circuit behavior.