ALZ22F48 General Purpose Relay SPST 16A 48VDC – Equivalent & Substitute Parts

Part Overview

The ALZ22F48 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 features sealed construction with Class F coil insulation. The ALZ22F48 is currently obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new designs requiring compatible relay functionality.

Key Parameters

Parameter	Value
Manufacturer Part Number	ALZ22F48
Manufacturer	Panasonic Electric Works
Coil Voltage	48VDC
Contact Form	SPST-NO (1 Form A)
Contact Rating (Current)	16 A
Switching Voltage (Max)	440VAC
Load – Max Switching	7040VA
Mounting Type	Through Hole
Termination Style	PC Pin
Operating Temperature Range	-40°C ~ 105°C
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the ALZ22F48 is determined by strict equivalence across the following critical parameters:

Primary Equivalence Criteria:

Coil voltage: 48VDC
Contact form: SPST-NO (1 Form A)
Contact rating: 16A minimum
Mounting type: Through Hole
Termination style: PC Pin
Coil type: Non Latching
Coil insulation: Class F

Parametric Equivalents (ALZ52F48, ALZ52F48T) are manufactured by Panasonic Electric Works and match all critical electrical and mechanical parameters of the ALZ22F48. These parts are direct functional replacements with identical coil resistance (5.76 kOhms), operate/release times (15ms/5ms), and contact material (Silver Tin Oxide). Both are active products with improved availability compared to the obsolete ALZ22F48.

Similar Substitutes (TE Connectivity Potter & Brumfield Relays: 1-1415898-1, 1-1415899-8, 5-1415899-1, RT33K048, RT33L048) meet the core functional requirements but exhibit minor variations in switching voltage maximum (400VAC vs. 440VAC), operate/release times, contact materials, and operating temperature ranges. These parts are functionally compatible for applications where the specified parameter variations are acceptable.

Parameter Comparison

Parameter	ALZ22F48 (Main)	ALZ52F48	ALZ52F48T	1-1415898-1	1-1415899-8	5-1415899-1	RT33K048	RT33L048
Manufacturer	Panasonic	Panasonic	Panasonic	TE Connectivity	TE Connectivity	TE Connectivity	TE Connectivity	TE Connectivity
Coil Voltage	48VDC	48VDC	48VDC	48VDC	48VDC	48VDC	48VDC	48VDC
Contact Form	SPST-NO	SPST-NO	SPST-NO	SPST-NO	SPST-NO	SPST-NO	SPST-NO	SPST-NO
Contact Rating	16A	16A	16A	16A	16A	16A	16A	16A
Switching Voltage (Max)	440VAC	440VAC	440VAC	400VAC	400VAC	400VAC	400VAC	400VAC
Load – Max Switching	7040VA	7040VA	7040VA	–	–	–	–	–
Coil Current	8.3mA	8.3mA	8.3mA	8.7mA	8.4mA	8.4mA	8.7mA	8.7mA
Coil Resistance	5.76 kOhms	5.76 kOhms	5.76 kOhms	5.52 kOhms	5.73 kOhms	5.73 kOhms	5.52 kOhms	5.52 kOhms
Operate Time	15ms	15ms	15ms	10ms	8ms	8ms	9ms	9ms
Release Time	5ms	5ms	5ms	5ms	6ms	6ms	6ms	6ms
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Contact Material	Silver Tin Oxide (AgSnO)	Silver Tin Oxide (AgSnO)	Silver Tin Oxide (AgSnO)	Silver Tin Oxide (AgSnO), Tungsten (W)	Silver Nickel (AgNi)	Silver Tin Oxide (AgSnO)	Silver Nickel (AgNi)	Silver Tin Oxide (AgSnO)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Termination Style	PC Pin	PC Pin	PC Pin	PC Pin	PC Pin	PC Pin	PC Pin	PC Pin
Seal Rating	Sealed – Fully	Sealed – Fully	Sealed – Fully	Sealed – Flux Protection	–	–	Sealed – Flux Protection	Sealed – Flux Protection
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active
RoHS Status	–	RoHS Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Parametric Equivalents): ALZ52F48 and ALZ52F48T are the preferred substitutes for ALZ22F48. Both are manufactured by Panasonic Electric Works and provide identical electrical performance across all critical parameters. ALZ52F48T is packaged in tube format, while ALZ52F48 is also available in tube. Both are active products with RoHS compliance and superior inventory availability (1077 and 810 units respectively). These parts are suitable for applications requiring full parameter equivalence without design modification.

For Functional Compatibility (Similar Substitutes): TE Connectivity Potter & Brumfield Relays parts (1-1415898-1, 1-1415899-8, 5-1415899-1, RT33K048, RT33L048) are functionally compatible alternatives. These parts meet the core relay requirements but operate within a reduced temperature range (-40°C to 85°C versus -40°C to 105°C) and have a lower maximum switching voltage (400VAC versus 440VAC). Selection from this group depends on application-specific requirements:

RT33L048 offers the highest inventory availability (1601 units) with Silver Tin Oxide contact material matching the ALZ22F48.
RT33K048 provides similar performance with Silver Nickel contacts and 1105 units in stock.
5-1415899-1 and 1-1415899-8 are available in bulk packaging with 892 and 861 units respectively.
1-1415898-1 includes tungsten contact material for enhanced durability in specific switching applications.

All TE Connectivity substitutes carry ROHS3 compliance and active product status, ensuring long-term availability and regulatory alignment.

Frequently Asked Questions (FAQ)

Q: Can ALZ52F48 or ALZ52F48T be used as direct replacements for ALZ22F48? A: Yes. ALZ52F48 and ALZ52F48T are parametric equivalents with identical coil voltage (48VDC), contact form (SPST-NO), current rating (16A), switching voltage (440VAC), operate/release times (15ms/5ms), and coil resistance (5.76 kOhms). Both are active products suitable for direct substitution without circuit modification.

Q: What are the key differences between Panasonic and TE Connectivity substitutes? A: Panasonic equivalents (ALZ52F48, ALZ52F48T) maintain full parameter parity with the ALZ22F48. TE Connectivity alternatives operate within a reduced temperature range (-40°C to 85°C) and have a lower maximum switching voltage (400VAC). Selection depends on whether your application requires the full -40°C to 105°C operating range and 440VAC switching capability.

Q: Are there packaging differences between substitute parts? A: Yes. ALZ52F48 and ALZ52F48T are supplied in tube packaging. TE Connectivity parts are available in tube (1-1415898-1, RT33K048, RT33L048) or bulk (1-1415899-8, 5-1415899-1) formats. Packaging selection should align with procurement and assembly requirements.

Q: Do all substitute parts meet RoHS compliance? A: ALZ52F48 and ALZ52F48T are RoHS Compliant. All TE Connectivity substitutes (1-1415898-1, 1-1415899-8, 5-1415899-1, RT33K048, RT33L048) are ROHS3 Compliant. The original ALZ22F48 does not specify RoHS status. For applications requiring RoHS compliance, use active substitute parts.

Q: Which substitute offers the best inventory availability? A: RT33L048 has the highest stock level at 1601 units. ALZ52F48 provides 1077 units, and RT33K048 offers 1105 units. For immediate availability, these three parts are recommended.

Q: Can TE Connectivity parts be used in applications requiring 440VAC switching? A: TE Connectivity substitutes are rated for 400VAC maximum switching voltage, which is 40VAC below the ALZ22F48 specification. Use these parts only in applications where the actual switching voltage does not exceed 400VAC. For applications requiring 440VAC capability, use Panasonic equivalents (ALZ52F48 or ALZ52F48T).

Q: Are there differences in contact material between substitutes? A: Yes. ALZ22F48, ALZ52F48, ALZ52F48T, 5-1415899-1, and RT33L048 use Silver Tin Oxide (AgSnO) contacts. RT33K048 and 1-1415899-8 use Silver Nickel (AgNi) contacts. 1-1415898-1 uses Silver Tin Oxide with Tungsten (W). Contact material selection affects performance in specific switching applications; consult application requirements for optimal selection.

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