ALZ22B48 General Purpose Relay SPST 16A 48VDC - Equivalent & Substitute Parts

Part Overview

The ALZ22B48 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 48VDC coil. This through-hole mounted relay is rated for 16A switching capacity at 440VAC maximum and is sealed for fully protected operation. The ALZ22B48 is currently obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new design implementations. Active alternatives from both Panasonic and TE Connectivity are available with identical or compatible electrical specifications.

Substiute Parts

ALZ22B48

Panasonic Electric WorksIn Stock: 1062ALZ22B48 Datasheet

Current PartRFQ

ALZ52B48

Panasonic Electric WorksIn Stock: 1158ALZ52B48 Datasheet

Parametric EquivalentRFQ

ALZ52B48T

Panasonic Electric WorksIn Stock: 949ALZ52B48T 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 ALZ22B48 is determined by strict equivalence across the following critical parameters: 48VDC coil voltage, SPST-NO contact form, 16A contact rating, through-hole mounting, PC pin termination, and operating temperature range of -40°C to 85°C. All substitute parts listed maintain these core specifications.

Panasonic Electric Works ALZ52B series parts (ALZ52B48 and ALZ52B48T) are parametric equivalents with identical electrical characteristics and differ only in product status (active versus obsolete) and packaging format (tube). These represent direct replacements with no functional deviation.

TE Connectivity Potter & Brumfield Relays parts (1-1415898-1, 1-1415899-8, 5-1415899-1, RT33K048, and RT33L048) are classified as similar alternatives. While maintaining the same coil voltage, contact form, current rating, mounting type, and temperature range, these parts exhibit minor variations in switching voltage maximum (400VAC versus 440VAC), coil current (8.4-8.7 mA versus 8.3 mA), coil resistance (5.52-5.73 kOhms versus 5.76 kOhms), seal rating specifications, coil insulation class (Class F versus Class B), and contact material composition. These variations remain within acceptable engineering tolerances for general purpose relay applications.

Parameter Comparison

Engineering Selection Recommendations

For direct replacement of the obsolete ALZ22B48, the Panasonic Electric Works ALZ52B48 and ALZ52B48T are the primary selections. Both parts are active products with identical electrical and mechanical specifications, ensuring seamless integration into existing designs. ALZ52B48 is supplied in tube packaging, while ALZ52B48T is also tube-packaged. Both are RoHS compliant, addressing modern regulatory requirements.

TE Connectivity alternatives (1-1415898-1, 1-1415899-8, 5-1415899-1, RT33K048, and RT33L048) are suitable for applications where the 40VAC reduction in maximum switching voltage (400VAC versus 440VAC) is acceptable. These parts are all active products with ROHS3 compliance. RT33L048 offers the highest inventory availability at 1601 pieces and maintains Silver Tin Oxide contact material matching the original specification. RT33K048 provides similar performance with Silver Nickel contacts and 1105 pieces in stock.

Selection between Panasonic and TE Connectivity alternatives should be based on supply chain requirements, packaging preferences, and application voltage margins. All listed substitutes maintain the critical 48VDC coil voltage, 16A contact rating, SPST-NO configuration, through-hole mounting, and -40°C to 85°C operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can ALZ52B48 and ALZ52B48T be used interchangeably with ALZ22B48?

A: Yes. Both ALZ52B48 and ALZ52B48T are parametric equivalents with identical electrical specifications to the ALZ22B48. The primary differences are product status (active versus obsolete) and packaging format. Both are suitable direct replacements.

Q: What is the difference between Panasonic ALZ52B series and TE Connectivity RT33 series relays?

A: The Panasonic ALZ52B series maintains the original 440VAC maximum switching voltage and Class B coil insulation. TE Connectivity RT33 series operates at 400VAC maximum switching voltage and uses Class F coil insulation. Both series meet the 48VDC coil voltage, 16A contact rating, and SPST-NO contact form requirements. The 40VAC difference in switching voltage maximum should be evaluated against application requirements.

Q: Are there compliance differences between the ALZ22B48 and its substitutes?

A: The ALZ22B48 is not specified for RoHS compliance. All active substitute parts (ALZ52B48, ALZ52B48T, and all TE Connectivity alternatives) are RoHS compliant or ROHS3 compliant, meeting current regulatory standards for new designs and procurement.

Q: What packaging options are available for substitutes?

A: Panasonic ALZ52B48 and ALZ52B48T are supplied in tube packaging. TE Connectivity parts are available in both tube packaging (1-1415898-1, RT33K048, RT33L048) and bulk packaging (1-1415899-8, 5-1415899-1). Packaging selection depends on procurement volume and handling requirements.

Q: Do the TE Connectivity alternatives have different contact materials?

A: Yes. TE Connectivity parts use either Silver Tin Oxide (AgSnO) or Silver Nickel (AgNi) contact materials. The original ALZ22B48 uses Silver Tin Oxide. RT33L048 and 5-1415899-1 maintain Silver Tin Oxide contacts, while RT33K048 and 1-1415899-8 use Silver Nickel contacts. Contact material selection should be based on application load characteristics and switching frequency.

Q: What is the inventory status for these substitute parts?

A: ALZ52B48 has 1123 pieces in stock, ALZ52B48T has 934 pieces, and TE Connectivity alternatives range from 761 to 1601 pieces in stock. RT33L048 offers the highest availability at 1601 pieces.

Q: Are there timing differences between the ALZ22B48 and substitute parts?

A: Yes. The ALZ22B48 has 15 ms operate time and 5 ms release time. TE Connectivity alternatives have faster operate times (8-10 ms) and slightly longer release times (6 ms). Panasonic ALZ52B series maintains the original 15 ms operate time and 5 ms release time. Timing differences should be evaluated for applications with critical switching speed requirements.