Equivalent & Substitute Parts for ALZ21F05

Part Overview

The ALZ21F05 is a general purpose relay manufactured by Panasonic Electric Works, configured as a SPST-NO (1 Form A) with a 5VDC coil and 16A contact rating. This through-hole mounted relay is designed for general switching applications with sealed flux protection and Class F coil insulation.

The ALZ21F05 is classified as obsolete. Identifying equivalent and substitute parts ensures design continuity and supply chain reliability for applications currently using this component.

Substiute Parts

ALZ21F05

Panasonic Electric WorksIn Stock: 952ALZ21F05 Datasheet

Current PartRFQ

ALZ51F05

Panasonic Electric WorksIn Stock: 799ALZ51F05 Datasheet

DirectRFQ

ALZ51F05T

Panasonic Electric WorksIn Stock: 751ALZ51F05T Datasheet

Parametric EquivalentRFQ

6-1415899-4

TE Connectivity Potter & Brumfield RelaysIn Stock: 10946-1415899-4 Datasheet

SimilarRFQ

RT334005

TE Connectivity Potter & Brumfield RelaysIn Stock: 1214RT334005 Datasheet

SimilarRFQ

RZ03-1A3-D005

TE Connectivity Potter & Brumfield RelaysIn Stock: 12957RZ03-1A3-D005 Datasheet

SimilarRFQ

RZ03-1A4-D005

TE Connectivity Potter & Brumfield RelaysIn Stock: 2181RZ03-1A4-D005 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ALZ21F05 is determined by strict equivalence across the following critical parameters:

• Coil voltage: 5VDC (exact match required)
• Contact form: SPST-NO (1 Form A) (exact match required)
• Contact rating: 16 A (exact match required)
• Mounting type: Through hole (exact match required)
• Termination style: PC pin (exact match required)
• Coil insulation: Class F (exact match required)
• Must operate voltage: 4.6 VDC (exact match required)
• Must release voltage: 0.5 VDC (exact match required)

All identified substitute parts meet these criteria. Variations in switching voltage maximum, coil current, operate time, release time, operating temperature range, contact material, and seal rating are within acceptable tolerance for general purpose relay applications and do not preclude substitution.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: ALZ51F05 or ALZ51F05T

Both ALZ51F05 and ALZ51F05T are active Panasonic Electric Works products that maintain identical electrical and mechanical specifications to the obsolete ALZ21F05. These parts provide direct functional equivalence with the advantage of current product status and RoHS compliance. ALZ51F05T is supplied in tube packaging, while ALZ51F05 is supplied in tube packaging as well.

Secondary Recommendation: TE Connectivity Potter & Brumfield Relays Alternatives

The TE Connectivity parts (6-1415899-4, RT334005, RZ03-1A3-D005, RZ03-1A4-D005) meet all critical electrical and mechanical substitution criteria. These parts are active products with ROHS3 compliance. Selection among these alternatives should be based on packaging requirements and operating temperature range constraints. Parts RT334005, RZ03-1A3-D005, and RZ03-1A4-D005 are rated to -40°C ~ 85°C, which is narrower than the ALZ21F05 specification of -40°C ~ 105°C. The 6-1415899-4 maintains the full -40°C ~ 105°C operating range.

Frequently Asked Questions (FAQ)

Q: Can ALZ51F05 or ALZ51F05T be used as direct replacements for ALZ21F05?

A: Yes. Both parts are functionally equivalent across all critical parameters: 5VDC coil voltage, SPST-NO contact form, 16A contact rating, through-hole mounting, PC pin termination, Class F coil insulation, and identical must-operate and must-release voltage thresholds. The primary difference is product status (active vs. obsolete) and RoHS compliance.

Q: What is the difference between ALZ51F05 and ALZ51F05T?

A: Both parts are electrically and mechanically identical. The suffix "T" indicates tube packaging. Selection between them depends on packaging and handling requirements for your application.

Q: Can TE Connectivity parts substitute for Panasonic Electric Works ALZ21F05?

A: Yes, all listed TE Connectivity parts (6-1415899-4, RT334005, RZ03-1A3-D005, RZ03-1A4-D005) meet the critical substitution criteria. However, verify operating temperature requirements: RT334005, RZ03-1A3-D005, and RZ03-1A4-D005 are rated to 85°C maximum, while ALZ21F05 is rated to 105°C. The 6-1415899-4 maintains the full 105°C rating.

Q: Are there differences in switching voltage between substitute parts?

A: Yes. ALZ21F05, ALZ51F05, and ALZ51F05T are rated to 440VAC maximum switching voltage. TE Connectivity parts are rated to 400VAC maximum. For applications requiring switching above 400VAC, use Panasonic Electric Works alternatives.

Q: What compliance certifications apply to these parts?

A: ALZ21F05 carries cURus and VDE approvals. ALZ51F05 and ALZ51F05T are RoHS Compliant. TE Connectivity parts are ROHS3 Compliant. All parts are REACH Unaffected and carry EAR99 ECCN classification.

Q: How do coil current variations affect substitution?

A: Coil current variations (80 mA to 84 mA) are within acceptable tolerance for general purpose relay applications and do not preclude substitution. Verify that your circuit design accommodates the specified coil current for each part.

Q: What packaging options are available?

A: ALZ21F05 is supplied without specified packaging. ALZ51F05 and ALZ51F05T are supplied in tube packaging. 6-1415899-4 is supplied in bulk packaging. RT334005, RZ03-1A3-D005, and RZ03-1A4-D005 are supplied in tube packaging. Select based on your procurement and assembly requirements.