ALZ12B09W Equivalent & Substitute Parts

Part Overview

The ALZ12B09W 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 RoHS compliance and unlimited moisture sensitivity rating. Substitute parts are identified when equivalent electrical and mechanical parameters are required due to inventory constraints, supply chain considerations, or application-specific packaging needs.

Substiute Parts

ALZ12B09W

Panasonic Electric WorksIn Stock: 1052ALZ12B09W Datasheet

Current PartRFQ

RZ03-1C4-D009

TE Connectivity Potter & Brumfield RelaysIn Stock: 5684RZ03-1C4-D009 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ALZ12B09W 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
• Termination: PC pin
• Coil current: 44.4 mA (within tolerance)
• Operating voltage thresholds: Must operate at 6.3VDC minimum, must release at 0.9VDC maximum
• Temperature range: -40°C to 85°C minimum
• Coil type: Non-latching

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 operational voltage thresholds. Differences in switching voltage maximum (400VAC vs. 440VAC), coil insulation class, and contact material do not preclude substitution when application requirements fall within the lower switching voltage specification.

Parameter Comparison

Engineering Selection Recommendations

Both the ALZ12B09W and RZ03-1C4-D009 are active production parts with current regulatory compliance. The ALZ12B09W carries cURus and VDE approvals with Class B coil insulation. The RZ03-1C4-D009 carries ROHS3 compliance with Class F coil insulation and REACH unaffected status.

Selection between these parts should be based on application-specific requirements:

• If maximum switching voltage of 440VAC is required, the ALZ12B09W is the appropriate choice.
• If switching voltage does not exceed 400VAC, either part is suitable.
• Coil resistance tolerance (203 Ohms vs. 200 Ohms) is negligible for circuit design purposes.
• Contact material differences (AgSnO vs. AgNi) may influence performance in specific load environments; application requirements should determine selection.
• Operate time difference (15 ms vs. 8 ms) should be evaluated against timing-critical applications.
• Packaging format (bulk vs. tube) may influence procurement and handling procedures.

Frequently Asked Questions (FAQ)

Q: Can the RZ03-1C4-D009 be used as a direct replacement for the ALZ12B09W?

A: Yes, provided the application switching voltage does not exceed 400VAC. Both relays share identical coil voltage, contact configuration, current rating, mounting type, and operational voltage thresholds. The RZ03-1C4-D009 operates faster (8 ms vs. 15 ms), which may be advantageous in time-sensitive circuits.

Q: What is the significance of the 40VAC difference in maximum switching voltage?

A: The ALZ12B09W supports switching up to 440VAC, while the RZ03-1C4-D009 supports up to 400VAC. Applications requiring switching above 400VAC must use the ALZ12B09W. For applications within the 400VAC range, both parts are equivalent.

Q: Are there differences in contact material performance?

A: The ALZ12B09W uses Silver Tin Oxide (AgSnO) contacts, while the RZ03-1C4-D009 uses Silver Nickel (AgNi) contacts. Both are suitable for general purpose switching. Contact material selection may influence performance under specific load conditions, arcing characteristics, or environmental exposure; application requirements should guide selection.

Q: Does packaging format affect electrical performance?

A: No. The ALZ12B09W is supplied in bulk packaging, while the RZ03-1C4-D009 is supplied in tube packaging. Packaging affects handling, storage, and procurement logistics only, not electrical or mechanical performance.

Q: Are both parts RoHS compliant?

A: Yes. The ALZ12B09W is RoHS Compliant. The RZ03-1C4-D009 is ROHS3 Compliant. Both meet current RoHS requirements.

Q: What is the coil resistance tolerance between these parts?

A: The ALZ12B09W has 203 Ohms coil resistance, while the RZ03-1C4-D009 has 200 Ohms. This 1.5% difference is negligible for circuit design and does not affect substitution eligibility.