ALZ21F48 Equivalent & Substitute Parts

Part Overview

The ALZ21F48 is a general purpose relay manufactured by Panasonic Electric Works, configured as a SPST-NO (1 Form A) with 48VDC coil voltage 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 ALZ21F48 is classified as obsolete. Equivalent and substitute parts are available from both Panasonic Electric Works and TE Connectivity Potter & Brumfield Relays, offering active product status with identical or compatible electrical and mechanical specifications.

Substiute Parts

ALZ21F48

Panasonic Electric WorksIn Stock: 791ALZ21F48 Datasheet

Current PartRFQ

ALZ51F48

Panasonic Electric WorksIn Stock: 689ALZ51F48 Datasheet

DirectRFQ

ALZ51F48T

Panasonic Electric WorksIn Stock: 1118ALZ51F48T Datasheet

Parametric EquivalentRFQ

1-1415898-1

TE Connectivity Potter & Brumfield RelaysIn Stock: 8321-1415898-1 Datasheet

SimilarRFQ

1-1415899-8

TE Connectivity Potter & Brumfield RelaysIn Stock: 9361-1415899-8 Datasheet

SimilarRFQ

5-1415899-1

TE Connectivity Potter & Brumfield RelaysIn Stock: 9495-1415899-1 Datasheet

SimilarRFQ

RT33K048

TE Connectivity Potter & Brumfield RelaysIn Stock: 1125RT33K048 Datasheet

SimilarRFQ

RT33L048

TE Connectivity Potter & Brumfield RelaysIn Stock: 1621RT33L048 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ALZ21F48 is determined by strict equivalence across the following critical parameters:

• Coil voltage: 48VDC (mandatory match)
• Contact form: SPST-NO (1 Form A) (mandatory match)
• Contact rating: 16A (mandatory match)
• Mounting type: Through Hole (mandatory match)
• Termination style: PC Pin (mandatory match)
• Coil insulation: Class F (mandatory match)
• Must operate voltage: 33.6VDC (mandatory match)
• Must release voltage: 4.8VDC (mandatory match)

All substitute parts listed meet these criteria. Variations in switching voltage maximum (440VAC vs. 400VAC), operating temperature range, operate/release times, and contact material composition do not preclude substitution when the above parameters are identical.

Parameter Comparison

Engineering Selection Recommendations

For direct replacement of the obsolete ALZ21F48, the Panasonic Electric Works ALZ51F48 and ALZ51F48T are preferred substitutes. Both parts are active products with identical electrical specifications, coil resistance, operating temperature range, and contact material composition. The ALZ51F48T offers the highest inventory availability at 1020 pieces.

TE Connectivity Potter & Brumfield Relays parts (1-1415898-1, 1-1415899-8, 5-1415899-1, RT33K048, RT33L048) are functionally equivalent substitutes. These parts meet all mandatory electrical parameters but operate within a reduced temperature range (-40°C ~ 85°C versus -40°C ~ 105°C) and have a lower maximum switching voltage specification (400VAC versus 440VAC). All TE Connectivity parts carry RoHS3 compliance certification.

Selection should prioritize product status (active versus obsolete), compliance requirements, and operating environment constraints. The Panasonic Electric Works ALZ51F48 series maintains full parameter equivalence with the original ALZ21F48.

Frequently Asked Questions (FAQ)

Q: Can ALZ51F48 directly replace ALZ21F48 in existing designs?

A: Yes. The ALZ51F48 is a direct equivalent with identical coil voltage (48VDC), contact form (SPST-NO), contact rating (16A), coil resistance (5.76 kOhms), operating temperature range (-40°C ~ 105°C), and contact material (Silver Tin Oxide). The primary difference is product status: ALZ21F48 is obsolete while ALZ51F48 is active.

Q: What is the difference between ALZ51F48 and ALZ51F48T?

A: Both parts are parametrically identical. The designation difference reflects packaging: ALZ51F48 is supplied in tube packaging, while ALZ51F48T is also supplied in tube packaging. Both are active products with equivalent electrical and mechanical specifications.

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

A: TE Connectivity parts (RT33L048, RT33K048, 1-1415898-1, 1-1415899-8, 5-1415899-1) meet all mandatory substitution criteria: 48VDC coil voltage, SPST-NO contact form, 16A contact rating, and identical must-operate and must-release voltages. However, they operate within a reduced temperature range (-40°C ~ 85°C) and have a lower maximum switching voltage (400VAC). Substitution is valid only when the application does not require the extended temperature range or higher switching voltage of the original part.

Q: What packaging options are available?

A: Panasonic Electric Works ALZ51F48 and ALZ51F48T are supplied in tube packaging. TE Connectivity 1-1415899-8 and 5-1415899-1 are supplied in bulk packaging. All parts use PC pin termination for through-hole mounting.

Q: Are all substitute parts RoHS compliant?

A: ALZ51F48 and ALZ51F48T are RoHS compliant. TE Connectivity parts (RT33L048, RT33K048, 1-1415898-1, 1-1415899-8, 5-1415899-1) carry RoHS3 compliance certification. The original ALZ21F48 RoHS status is not specified.

Q: What is the coil current specification for each part?

A: Panasonic Electric Works ALZ21F48, ALZ51F48, and ALZ51F48T all specify 8.3 mA coil current. TE Connectivity parts specify either 8.4 mA (1-1415899-8, 5-1415899-1) or 8.7 mA (1-1415898-1, RT33K048, RT33L048). These minor variations do not affect substitution eligibility.