ALZ21F09W General Purpose Relay SPST 16A 9VDC Equivalent & Substitute Parts

Part Overview

The ALZ21F09W is a general purpose relay manufactured by Panasonic Electric Works, featuring a SPST-NO (1 Form A) contact configuration with 16A switching capacity at 9VDC coil voltage. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new design implementations. The relay is designed for through-hole mounting with sealed flux protection and operates across an industrial temperature range of -40°C to 105°C.

Substiute Parts

ALZ21F09W

Panasonic Electric WorksIn Stock: 837ALZ21F09W Datasheet

Current PartRFQ

ALZ51F09W

Panasonic Electric WorksIn Stock: 1151ALZ51F09W Datasheet

DirectRFQ

ALZN5F09

Panasonic Electric WorksIn Stock: 967ALZN5F09 Datasheet

Parametric EquivalentRFQ

1-1415540-6

TE Connectivity Potter & Brumfield RelaysIn Stock: 12271-1415540-6 Datasheet

SimilarRFQ

RZ03-1A4-D009

TE Connectivity Potter & Brumfield RelaysIn Stock: 2193RZ03-1A4-D009 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict parameter matching across electrical and mechanical specifications. The following criteria establish valid substitution relationships:

Primary Substitution Criteria:

• Coil voltage: 9VDC (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)
• Operating temperature range: Must encompass or match the original specification

Secondary Compatibility Factors:

• Coil resistance tolerance (±5% acceptable)
• Switching voltage rating (equal or higher acceptable)
• Contact material composition (functionally equivalent materials acceptable)
• Seal rating and flux protection (equivalent protection levels acceptable)

Substitute parts are grouped into two categories: direct manufacturer equivalents (same manufacturer, different product status or series) and parametric equivalents (different manufacturers, identical electrical and mechanical specifications).

Parameter Comparison

Engineering Selection Recommendations

Preferred Substitutes (Active Product Status):

ALZ51F09W and ALZN5F09 are the primary recommended substitutes. Both are manufactured by Panasonic Electric Works with active product status, ensuring long-term availability and supply chain continuity. ALZ51F09W maintains identical specifications to the original ALZ21F09W with the exception of packaging format (bulk versus original specification). ALZN5F09 represents a parametric equivalent within the Panasonic ALZN series, offering identical electrical and mechanical performance with active market availability.

Secondary Substitutes (Compliance Considerations):

RZ03-1A4-D009 manufactured by TE Connectivity Potter & Brumfield Relays is an active product with ROHS3 compliance and REACH unaffected status. This substitute maintains all critical electrical parameters with the exception of maximum operating temperature (85°C versus 105°C for the original). This temperature limitation must be evaluated against specific application requirements. The contact material differs (Silver Nickel versus Silver Tin Oxide), which is functionally acceptable for general purpose switching applications.

1-1415540-6 is classified as obsolete and carries REACH affected status, making it unsuitable for new designs or long-term maintenance applications despite meeting all electrical and mechanical specifications.

Frequently Asked Questions (FAQ)

Q: Can ALZ51F09W directly replace ALZ21F09W in existing applications?

A: Yes. ALZ51F09W is a direct substitute with identical electrical specifications, contact configuration, coil voltage, current rating, and operating temperature range. The primary difference is packaging format (bulk versus original). No circuit modifications are required.

Q: What is the difference between ALZ51F09W and ALZN5F09?

A: Both are Panasonic Electric Works products with identical electrical and mechanical specifications. ALZN5F09 represents a different product series (ALZN versus ALZ51) but maintains equivalent performance parameters. Selection between these two should be based on availability and packaging requirements.

Q: Is RZ03-1A4-D009 suitable for applications requiring -40°C to 105°C operation?

A: RZ03-1A4-D009 operates across -40°C to 85°C, which does not encompass the full original temperature range. Applications requiring operation above 85°C must use ALZ51F09W or ALZN5F09. Applications with maximum operating temperatures at or below 85°C may use RZ03-1A4-D009.

Q: Why is 1-1415540-6 not recommended despite meeting electrical specifications?

A: 1-1415540-6 carries obsolete product status and REACH affected compliance status. These factors create supply chain risk and regulatory compliance concerns for new designs and long-term maintenance applications.

Q: Are there contact material compatibility concerns between Silver Tin Oxide and Silver Nickel contacts?

A: Both contact materials are suitable for general purpose relay applications. Silver Nickel contacts in RZ03-1A4-D009 provide equivalent switching performance for the specified 16A current rating and 400VAC maximum switching voltage. Material selection should be confirmed against specific load characteristics and application requirements.

Q: What packaging formats are available for these substitutes?

A: ALZ21F09W original packaging is not specified in available data. ALZ51F09W is available in bulk packaging. ALZN5F09 is available in bulk packaging. TE Connectivity parts (1-1415540-6 and RZ03-1A4-D009) are supplied in tube packaging. Packaging selection impacts handling, storage, and assembly processes.