ALZ12F09 Equivalent & Substitute Parts

Part Overview

The ALZ12F09 is a general purpose relay manufactured by Panasonic Electric Works, featuring a single pole double throw (SPDT) contact configuration with a 9VDC coil. This through-hole mounted relay is designed for applications requiring 16A switching capacity at up to 440VAC. The part is currently active in production with full inventory availability. Substitute parts are identified when equivalent electrical and mechanical parameters are required due to supply constraints, design flexibility, or application-specific requirements.

Key Parameters

Parameter	Value
Coil Voltage	9VDC
Contact Form	SPDT (1 Form C)
Contact Rating (Current)	16 A
Switching Voltage - Max	440VAC
Mounting Type	Through Hole
Termination Style	PC Pin
Coil Current	44.4 mA
Coil Resistance	203 Ohms
Operating Temperature Range	-40°C ~ 105°C
Coil Type	Non Latching
Seal Rating	Sealed - Fully
Contact Material	Silver Tin Oxide (AgSnO)
RoHS Status	RoHS Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the ALZ12F09 is determined by strict equivalence across the following critical parameters:

Coil voltage: 9VDC (exact match required)
Contact configuration: SPDT (1 Form C)
Current rating: 16A minimum
Mounting type: Through hole with PC pin termination
Coil type: Non latching
Coil current: 44.4 mA (tolerance within ±5%)
Coil resistance: 200–203 Ohms
Operating temperature range: Minimum -40°C to +85°C
Regulatory compliance: RoHS compliant

The RZ03-1C4-D009 manufactured by TE Connectivity Potter & Brumfield Relays meets all substitution criteria. Both parts share identical coil voltage, contact form, current rating, mounting configuration, and coil current specifications. Coil resistance values are within acceptable tolerance (200 vs. 203 Ohms). Both parts maintain RoHS compliance and operate across overlapping temperature ranges.

Parameter Comparison

Parameter	ALZ12F09 (Panasonic)	RZ03-1C4-D009 (TE Connectivity)	Match Status
Coil Voltage	9VDC	9VDC	Exact
Contact Form	SPDT (1 Form C)	SPDT (1 Form C)	Exact
Contact Rating (Current)	16 A	16 A	Exact
Switching Voltage - Max	440VAC	400VAC	Substitute rated lower
Mounting Type	Through Hole	Through Hole	Exact
Termination Style	PC Pin	PC Pin	Exact
Coil Current	44.4 mA	44.4 mA	Exact
Coil Resistance	203 Ohms	200 Ohms	Within tolerance
Coil Type	Non Latching	Non Latching	Exact
Coil Insulation	Class F	Class F	Exact
Must Operate Voltage	6.3 VDC	6.3 VDC	Exact
Must Release Voltage	0.9 VDC	0.9 VDC	Exact
Operating Temperature Range	-40°C ~ 105°C	-40°C ~ 85°C	Substitute range narrower
Contact Material	Silver Tin Oxide (AgSnO)	Silver Nickel (AgNi)	Different material
RoHS Status	RoHS Compliant	ROHS3 Compliant	Both compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	Exact

Engineering Selection Recommendations

The RZ03-1C4-D009 is a direct functional substitute for the ALZ12F09 in applications where the following conditions are met:

Operating voltage does not exceed 400VAC (the substitute's maximum switching voltage)
Operating temperature does not exceed 85°C (the substitute's maximum rated temperature)
Contact material composition (Silver Nickel vs. Silver Tin Oxide) is acceptable for the application's load characteristics and switching frequency

Both parts carry equivalent regulatory approvals (RoHS compliance and ECCN EAR99 classification). Both maintain MSL Level 1 rating, indicating unlimited shelf life under standard storage conditions. The substitute part is currently in active production with higher inventory availability (5670 pcs vs. 1035 pcs for the main part).

Frequently Asked Questions (FAQ)

Q: Can the RZ03-1C4-D009 replace the ALZ12F09 in all applications?

A: The RZ03-1C4-D009 is functionally equivalent for applications operating at or below 400VAC and 85°C. Applications requiring the full 440VAC switching capability or operating above 85°C require the ALZ12F09 or equivalent parts rated for those conditions.

Q: What is the difference between Silver Tin Oxide and Silver Nickel contact materials?

A: Both materials are suitable for general purpose relay applications. Silver Tin Oxide (AgSnO) provides enhanced resistance to contact erosion under certain load conditions. Silver Nickel (AgNi) offers good general-purpose performance. Material selection depends on specific load characteristics and switching frequency requirements of the application.

Q: Are the coil resistance values close enough for direct substitution?

A: Yes. The coil resistance values of 203 Ohms (ALZ12F09) and 200 Ohms (RZ03-1C4-D009) are within acceptable tolerance for general purpose relay applications. Both parts draw identical coil current (44.4 mA) at 9VDC.

Q: Do both parts have the same physical footprint?

A: Both parts feature through-hole mounting with PC pin termination. Physical footprint compatibility must be confirmed by comparing mechanical drawings, as this information is not provided in the electrical specifications.

Q: What is the difference in operate and release times?

A: The ALZ12F09 operates in 15 ms with 5 ms release time. The RZ03-1C4-D009 operates in 8 ms with 6 ms release time. Applications with timing-critical switching requirements must account for these differences.

Q: Are both parts RoHS compliant?

A: Yes. The ALZ12F09 is RoHS Compliant. The RZ03-1C4-D009 is ROHS3 Compliant. Both meet current RoHS requirements for electronic components.

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