ALZ22F24 General Purpose Relay SPST 16A 24VDC – Equivalent & Substitute Parts

Part Overview

The ALZ22F24 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 24VDC coil. This through-hole mounted relay is rated for 16A switching at 440VAC maximum, with a coil resistance of 1.44 kOhms and sealed construction rated for Class F insulation. The ALZ22F24 is classified as obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new design implementations. Active alternatives from both Panasonic Electric Works and TE Connectivity Potter & Brumfield Relays provide direct functional replacement while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Coil Voltage	24VDC
Contact Form	SPST-NO (1 Form A)
Contact Rating (Current)	16 A
Switching Voltage (Max)	440VAC
Coil Current	16.7 mA
Coil Resistance	1.44 kOhms
Mounting Type	Through Hole
Termination Style	PC Pin
Operating Temperature Range	-40°C ~ 105°C
Coil Insulation	Class F
Seal Rating	Sealed - Fully
Contact Material	Silver Tin Oxide (AgSnO)

Substitute Part Grouping Explanation

Substitution eligibility for the ALZ22F24 is determined by strict equivalence across the following critical parameters: 24VDC coil voltage, SPST-NO contact configuration, 16A contact rating, PC pin termination, through-hole mounting, and Class F coil insulation. All substitute parts listed maintain these core electrical and mechanical specifications. Parametric equivalents (ALZ52F24 and ALZ52F24T) are direct Panasonic Electric Works successors with identical electrical performance and active product status. Similar substitutes from TE Connectivity Potter & Brumfield Relays (4-1415538-9, 7-1415899-3, 9-1415047-1, RT33L024, RTD34024F, RTH34024, and RZ03-1A4-D024) meet all mandatory electrical parameters while maintaining functional compatibility. Minor variations in switching voltage maximum (400VAC vs. 440VAC), operate/release timing, and operating temperature upper limits do not preclude substitution where the ALZ22F24 application does not require the full 440VAC switching capability or extended temperature range to 105°C.

Parameter Comparison

Part Number	Manufacturer	Product Status	Coil Voltage	Contact Form	Contact Rating	Switching Voltage (Max)	Coil Current	Coil Resistance	Operating Temperature	Contact Material	Seal Rating
ALZ22F24	Panasonic Electric Works	Obsolete	24VDC	SPST-NO	16 A	440VAC	16.7 mA	1.44 kOhms	-40°C ~ 105°C	Silver Tin Oxide (AgSnO)	Sealed - Fully
ALZ52F24	Panasonic Electric Works	Active	24VDC	SPST-NO	16 A	440VAC	16.7 mA	1.44 kOhms	-40°C ~ 105°C	Silver Tin Oxide (AgSnO)	Sealed - Fully
ALZ52F24T	Panasonic Electric Works	Active	24VDC	SPST-NO	16 A	440VAC	16.7 mA	1.44 kOhms	-40°C ~ 105°C	Silver Tin Oxide (AgSnO)	Sealed - Fully
4-1415538-9	TE Connectivity Potter & Brumfield Relays	Active	24VDC	SPST-NO	16 A	400VAC	16.7 mA	1.44 kOhms	-40°C ~ 85°C	Silver Tin Oxide (AgSnO)	Sealed - Fully
7-1415899-3	TE Connectivity Potter & Brumfield Relays	Active	24VDC	SPST-NO	16 A	400VAC	16.7 mA	1.44 kOhms	-40°C ~ 85°C	Silver Nickel (AgNi)	Not Specified
9-1415047-1	TE Connectivity Potter & Brumfield Relays	Active	24VDC	SPST-NO	16 A	400VAC	16.7 mA	1.44 kOhms	-40°C ~ 105°C	Silver Nickel (AgNi)	Not Specified
RT33L024	TE Connectivity Potter & Brumfield Relays	Active	24VDC	SPST-NO	16 A	400VAC	16.7 mA	1.44 kOhms	-40°C ~ 85°C	Silver Tin Oxide (AgSnO)	Sealed - Flux Protection
RTD34024F	TE Connectivity Potter & Brumfield Relays	Active	24VDC	SPST-NO	16 A	400VAC	16.7 mA	1.44 kOhms	-40°C ~ 85°C	Silver Nickel (AgNi)	Sealed - Fully
RTH34024	TE Connectivity Potter & Brumfield Relays	Active	24VDC	SPST-NO	16 A	400VAC	16.7 mA	1.44 kOhms	-40°C ~ 105°C	Silver Nickel (AgNi)	Not Specified
RZ03-1A4-D024	TE Connectivity Potter & Brumfield Relays	Active	24VDC	SPST-NO	16 A	400VAC	16.7 mA	1.44 kOhms	-40°C ~ 85°C	Silver Nickel (AgNi)	Not Specified

Engineering Selection Recommendations

For applications requiring direct parametric equivalence with identical electrical performance and full 440VAC switching capability, ALZ52F24 and ALZ52F24T from Panasonic Electric Works are the primary choices. Both are active products with ROHS3 compliance and maintain the original ALZ22F24 specifications including Silver Tin Oxide contact material and full sealing. ALZ52F24 is supplied in tube packaging, while ALZ52F24T is also tube-packaged.

TE Connectivity Potter & Brumfield Relays substitutes are suitable where applications operate within 400VAC maximum switching voltage and do not require the extended upper operating temperature of 105°C. Among TE Connectivity options, 4-1415538-9 and RT33L024 retain Silver Tin Oxide contact material matching the ALZ22F24. The 9-1415047-1 and RTH34024 variants extend the operating temperature range to 105°C, matching the ALZ22F24 specification, though with Silver Nickel contact material. All TE Connectivity substitutes carry ROHS3 compliance and active product status.

Frequently Asked Questions (FAQ)

Q: Can ALZ52F24 and ALZ52F24T be used interchangeably with ALZ22F24?

A: Yes. Both are parametric equivalents with identical coil voltage (24VDC), contact form (SPST-NO), contact rating (16A), switching voltage (440VAC max), coil current (16.7 mA), coil resistance (1.44 kOhms), operating temperature range (-40°C ~ 105°C), and contact material (Silver Tin Oxide). The primary difference is packaging: ALZ52F24 is supplied in tube, while ALZ52F24T is also tube-packaged. Both are active products from Panasonic Electric Works.

Q: What is the difference between Panasonic Electric Works and TE Connectivity substitutes?

A: Panasonic Electric Works substitutes (ALZ52F24, ALZ52F24T) are direct parametric equivalents with 440VAC maximum switching voltage. TE Connectivity substitutes operate at 400VAC maximum switching voltage. TE Connectivity options vary in contact material (Silver Nickel vs. Silver Tin Oxide), seal rating, and operating temperature range. All maintain the core 24VDC coil, 16A contact rating, and 1.44 kOhms coil resistance.

Q: Can I use a TE Connectivity substitute if my application requires 440VAC switching?

A: No. TE Connectivity substitutes are rated for 400VAC maximum switching voltage. Applications requiring 440VAC switching capability must use ALZ52F24 or ALZ52F24T from Panasonic Electric Works.

Q: Which substitute maintains the -40°C ~ 105°C operating temperature range of the ALZ22F24?

A: Among TE Connectivity options, 9-1415047-1 and RTH34024 extend to 105°C upper operating temperature. Panasonic Electric Works substitutes ALZ52F24 and ALZ52F24T maintain the full -40°C ~ 105°C range. All other TE Connectivity substitutes are limited to -40°C ~ 85°C.

Q: Does contact material affect substitution compatibility?

A: Contact material does not prevent substitution if all electrical parameters match. The ALZ22F24 uses Silver Tin Oxide (AgSnO). Panasonic Electric Works substitutes maintain this material. TE Connectivity substitutes use either Silver Tin Oxide (4-1415538-9, RT33L024) or Silver Nickel (AgNi) (7-1415899-3, 9-1415047-1, RTD34024F, RTH34024, RZ03-1A4-D024). Contact material selection depends on application-specific load characteristics and switching frequency requirements.

Q: What packaging options are available for substitutes?

A: ALZ52F24 is supplied in tube packaging. ALZ52F24T is tube-packaged. TE Connectivity substitutes are available in bulk (4-1415538-9), tube (7-1415899-3, RTH34024, RZ03-1A4-D024), and box (RT33L024, RTD34024F) packaging. Packaging selection does not affect electrical performance.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All active substitute parts listed carry ROHS3 compliance certification. The obsolete ALZ22F24 does not have ROHS3 status specified.

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