ALZ51B09W Equivalent & Substitute Parts

Part Overview

The ALZ51B09W is a general purpose relay manufactured by Panasonic Electric Works, designed for SPST-NO (1 Form A) switching applications with a 9VDC coil. This through-hole mounted relay is rated for 16A at 440VAC maximum switching voltage and is currently in active production status. The part is RoHS compliant with Class B coil insulation and sealed flux protection, making it suitable for industrial control and automation circuits requiring reliable electromechanical switching.

Equivalent and substitute parts are identified when they share identical or compatible electrical and mechanical parameters, allowing direct replacement in circuit designs without functional degradation.

Substiute Parts

ALZ51B09W

Panasonic Electric WorksIn Stock: 1193ALZ51B09W Datasheet

Current PartRFQ

1-1415540-6

TE Connectivity Potter & Brumfield RelaysIn Stock: 12271-1415540-6 Datasheet

SimilarRFQ

RZ03-1A4-D009

TE Connectivity Potter & Brumfield RelaysIn Stock: 2193RZ03-1A4-D009 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ALZ51B09W is determined by strict alignment of the following critical parameters:

• Coil voltage: 9VDC (exact match required)
• Contact form: SPST-NO (1 Form A) (exact match required)
• Contact rating: 16A minimum (exact match required)
• Mounting type: Through hole (exact match required)
• Termination style: PC pin (exact match required)
• Coil type: Non latching (exact match required)
• Must operate voltage: 6.3 VDC (exact match required)
• Must release voltage: 0.9 VDC (exact match required)

Two substitute parts meet these criteria: TE Connectivity Potter & Brumfield part 1-1415540-6 and RZ03-1A4-D009. Both share identical coil voltage, contact configuration, current rating, mounting method, and termination style. Variations in switching voltage, coil insulation class, contact material, and operating temperature ranges do not prevent substitution when the primary electrical and mechanical parameters align.

Parameter Comparison

Engineering Selection Recommendations

RZ03-1A4-D009 (TE Connectivity Potter & Brumfield Relays) is the primary substitute for ALZ51B09W. Both parts are in active production status, ensuring long-term availability and supply chain stability. The RZ03-1A4-D009 maintains identical coil voltage, contact configuration, current rating, and termination specifications. Minor differences in operate time (8 ms vs. 15 ms) and release time (6 ms vs. 5 ms) represent faster switching characteristics, which are compatible with applications designed for the ALZ51B09W. Both parts carry ROHS3 compliance and operate across the -40°C to 85°C temperature range.

1-1415540-6 (TE Connectivity Potter & Brumfield Relays) meets all critical electrical and mechanical substitution criteria but carries obsolete product status. This part should be selected only when existing inventory is available or when legacy system maintenance requires exact historical equivalence. The extended operating temperature range (-40°C to 105°C) provides additional thermal margin compared to the ALZ51B09W.

Frequently Asked Questions (FAQ)

Q: Can RZ03-1A4-D009 be used as a direct replacement for ALZ51B09W in new designs?

A: Yes. Both parts share identical coil voltage (9VDC), contact form (SPST-NO), current rating (16A), mounting type (through hole), and termination style (PC pin). The faster switching times of the RZ03-1A4-D009 are compatible with ALZ51B09W circuit applications.

Q: What is the significance of the different switching voltage ratings (440VAC vs. 400VAC)?

A: The ALZ51B09W supports 440VAC maximum switching voltage, while both TE Connectivity substitutes are rated for 400VAC. For applications operating at or below 400VAC, both substitutes are fully compatible. Applications requiring 400VAC to 440VAC switching must use the ALZ51B09W.

Q: Why is 1-1415540-6 listed as obsolete?

A: The 1-1415540-6 is no longer in active production by TE Connectivity. While it meets all electrical and mechanical substitution criteria, RZ03-1A4-D009 is the recommended active-status alternative for new designs and ongoing production.

Q: Are there packaging differences between these parts?

A: ALZ51B09W is supplied in bulk packaging, while both TE Connectivity substitutes are supplied in tube packaging. Packaging format does not affect electrical or mechanical compatibility.

Q: How do the coil insulation classes (Class B vs. Class F) affect substitution?

A: Coil insulation class determines thermal rating. Class F insulation (TE Connectivity parts) supports higher temperature operation than Class B (Panasonic part). For applications within the -40°C to 85°C range, both insulation classes are functionally equivalent.

Q: Is the 3-ohm difference in coil resistance (203 Ohms vs. 200 Ohms) significant?

A: No. The 1.5% resistance variation between ALZ51B09W (203 Ohms) and RZ03-1A4-D009 (200 Ohms) is within normal manufacturing tolerance and does not affect circuit performance when coil voltage is regulated at 9VDC.