ALZ22B24 General Purpose Relay SPST 16A 24VDC - Equivalent & Substitute Parts

Part Overview

The ALZ22B24 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 capacity at 440VAC maximum and is sealed for fully protected operation. The ALZ22B24 is classified as obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new design implementations. Substitute relays must maintain identical electrical performance characteristics including coil voltage, contact rating, switching voltage, and operating parameters to ensure direct functional replacement.

Key Parameters

Parameter	Value
Coil Voltage	24VDC
Contact Form	SPST-NO (1 Form A)
Contact Rating (Current)	16 A
Switching Voltage (Max)	440VAC
Mounting Type	Through Hole
Coil Current	16.7 mA
Coil Resistance	1.44 kOhms
Must Operate Voltage	16.8 VDC
Must Release Voltage	2.4 VDC
Operating Temperature Range	-40°C ~ 85°C
Termination Style	PC Pin
Coil Type	Non Latching

Substitute Part Grouping Explanation

Substitution of the ALZ22B24 is based on strict electrical and mechanical parameter matching. All substitute parts must satisfy the following mandatory criteria:

Coil voltage: 24VDC
Contact form: SPST-NO (1 Form A)
Contact rating: 16A minimum
Mounting type: Through Hole
Termination style: PC Pin
Coil current: 16.7 mA
Coil resistance: 1.44 kOhms
Must operate voltage: 16.8 VDC
Must release voltage: 2.4 VDC
Operating temperature range: -40°C minimum to 85°C minimum

Substitute parts are classified into two categories: parametric equivalents (identical electrical specifications) and similar parts (functionally compatible with minor parameter variations within acceptable engineering tolerances).

Parameter Comparison

Parameter	ALZ22B24	ALZ52B24T	4-1415538-9	7-1415899-3	9-1415047-1	RT33L024	RTH34024	RZ03-1A4-D024
Manufacturer	Panasonic	Panasonic	TE Connectivity	TE Connectivity	TE Connectivity	TE Connectivity	TE Connectivity	TE Connectivity
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active
Coil Voltage	24VDC	24VDC	24VDC	24VDC	24VDC	24VDC	24VDC	24VDC
Contact Form	SPST-NO	SPST-NO	SPST-NO	SPST-NO	SPST-NO	SPST-NO	SPST-NO	SPST-NO
Contact Rating	16 A	16 A	16 A	16 A	16 A	16 A	16 A	16 A
Switching Voltage (Max)	440VAC	440VAC	400VAC	400VAC	400VAC	400VAC	400VAC	400VAC
Coil Current	16.7 mA	16.7 mA	16.7 mA	16.7 mA	16.7 mA	16.7 mA	16.7 mA	16.7 mA
Coil Resistance	1.44 kOhms	1.44 kOhms	1.44 kOhms	1.44 kOhms	1.44 kOhms	1.44 kOhms	1.44 kOhms	1.44 kOhms
Must Operate Voltage	16.8 VDC	16.8 VDC	16.8 VDC	16.8 VDC	16.8 VDC	16.8 VDC	16.8 VDC	16.8 VDC
Must Release Voltage	2.4 VDC	2.4 VDC	2.4 VDC	2.4 VDC	2.4 VDC	2.4 VDC	2.4 VDC	2.4 VDC
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 105°C	-40°C ~ 85°C	-40°C ~ 105°C	-40°C ~ 85°C
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
Coil Insulation	Class B	Class B	Class F	Class F	Class F	Class F	Class F	Class F
Contact Material	Silver Tin Oxide	Silver Tin Oxide	Silver Tin Oxide	Silver Nickel	Silver Nickel	Silver Tin Oxide	Silver Nickel	Silver Nickel
RoHS Status	Not Specified	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Operate Time	15 ms	15 ms	9 ms	8 ms	8 ms	9 ms	8 ms	8 ms
Release Time	5 ms	5 ms	6 ms	6 ms	6 ms	6 ms	6 ms	6 ms

Engineering Selection Recommendations

Parametric Equivalent (Direct Replacement):

ALZ52B24T from Panasonic Electric Works is the parametric equivalent to ALZ22B24. This part maintains identical electrical specifications including coil voltage, contact rating, switching voltage, coil current, and operating temperature range. The ALZ52B24T is currently in active production status with 1120 units in stock. This part is recommended as the primary replacement for ALZ22B24 applications requiring direct functional equivalence.

Active Substitute Parts (TE Connectivity Potter & Brumfield Relays):

All TE Connectivity substitute parts (4-1415538-9, 7-1415899-3, 9-1415047-1, RT33L024, RTH34024, RZ03-1A4-D024) meet the mandatory electrical parameters for substitution. These parts are currently in active production with inventory availability ranging from 679 to 5154 units. All TE Connectivity substitutes carry ROHS3 compliance certification.

Switching Voltage Consideration:

ALZ22B24 and ALZ52B24T are rated for 440VAC maximum switching voltage. TE Connectivity substitute parts are rated for 400VAC maximum switching voltage. Applications requiring 440VAC switching capability must use ALZ52B24T. Applications operating at 400VAC or below may use any substitute part listed.

Operating Temperature Range:

Parts 9-1415047-1 and RTH34024 support extended operating temperature range to 105°C, compared to the standard -40°C to 85°C range of ALZ22B24. These parts are suitable for high-temperature applications.

Contact Material Variation:

ALZ22B24, ALZ52B24T, 4-1415538-9, and RT33L024 use Silver Tin Oxide contact material. Parts 7-1415899-3, 9-1415047-1, RTH34024, and RZ03-1A4-D024 use Silver Nickel contact material. Both materials are acceptable for general purpose relay applications within the specified electrical parameters.

Frequently Asked Questions (FAQ)

Q: Can ALZ52B24T directly replace ALZ22B24 in existing designs?

A: Yes. ALZ52B24T is the parametric equivalent with identical electrical specifications. The primary difference is product status (active versus obsolete) and packaging format (tube versus unspecified). Direct substitution is supported without circuit modification.

Q: What is the key difference between Panasonic and TE Connectivity substitute parts?

A: Panasonic ALZ52B24T maintains 440VAC maximum switching voltage identical to ALZ22B24. TE Connectivity parts are rated for 400VAC maximum switching voltage. For applications requiring 440VAC switching capability, ALZ52B24T is required. For 400VAC or lower applications, TE Connectivity parts are functionally equivalent.

Q: Are there operating temperature limitations when substituting with TE Connectivity parts?

A: Most TE Connectivity parts operate within the standard -40°C to 85°C range matching ALZ22B24. Parts 9-1415047-1 and RTH34024 support extended temperature to 105°C. Applications operating within -40°C to 85°C may use any substitute part. Applications exceeding 85°C require 9-1415047-1 or RTH34024.

Q: Does contact material affect substitution compatibility?

A: Contact material variation (Silver Tin Oxide versus Silver Nickel) does not prevent substitution within the specified electrical parameters. Both materials are suitable for general purpose relay applications at 16A 24VDC. Material selection is determined by application-specific load characteristics and switching frequency, not by direct replacement requirements.

Q: What packaging formats are available for substitute parts?

A: ALZ52B24T is supplied in tube packaging. TE Connectivity parts are available in tube (7-1415899-3, RTH34024, RZ03-1A4-D024), bulk (4-1415538-9), and box (RT33L024) packaging formats. Packaging selection does not affect electrical performance or substitution compatibility.

Q: Are all substitute parts RoHS compliant?

A: ALZ52B24T is RoHS Compliant. All TE Connectivity substitute parts carry ROHS3 Compliant certification. The original ALZ22B24 RoHS status is not specified. For applications requiring RoHS compliance, ALZ52B24T or any TE Connectivity substitute part is suitable.

Q: What is the inventory status for substitute parts?

A: ALZ52B24T has 1120 units in stock. TE Connectivity parts have inventory ranging from 679 units (9-1415047-1) to 5154 units (RT33L024). All substitute parts are currently in active production with confirmed availability.

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