ALZ12B05 General Purpose Relay SPDT 16A 5V - Equivalent & Substitute Parts

Part Overview

The ALZ12B05 is a general purpose relay manufactured by Panasonic Electric Works, featuring a single pole double throw (SPDT) contact configuration with a 5VDC 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 616 units in stock. Substitute parts become necessary when the primary manufacturer part is unavailable, when supply chain optimization is required, or when design flexibility allows for functionally equivalent alternatives that meet the same electrical and mechanical specifications.

Substiute Parts

ALZ12B05

Panasonic Electric WorksIn Stock: 667ALZ12B05 Datasheet

Current PartRFQ

5-1415899-2

TE Connectivity Potter & Brumfield RelaysIn Stock: 37015-1415899-2 Datasheet

SimilarRFQ

RT314005

TE Connectivity Potter & Brumfield RelaysIn Stock: 1494RT314005 Datasheet

SimilarRFQ

RZ03-1C4-D005

TE Connectivity Potter & Brumfield RelaysIn Stock: 39663RZ03-1C4-D005 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ALZ12B05 is determined by strict equivalence across the following critical parameters: 5VDC coil voltage, SPDT contact configuration, 16A contact rating, through-hole mounting with PC pin termination, non-latching coil type, and operating temperature range of -40°C to 85°C. All substitute parts must maintain identical must-operate and must-release voltage thresholds (4.6VDC and 0.5VDC respectively) to ensure functional compatibility in existing circuit designs. Contact material variations (Silver Tin Oxide versus Silver Nickel) are acceptable as both provide equivalent switching performance within the specified voltage and current parameters. Switching voltage ratings of 400VAC or higher satisfy the 440VAC maximum requirement of the original part. Seal rating differences and coil insulation class variations (Class B versus Class F) do not preclude substitution when all electrical parameters align.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts (5-1415899-2, RT314005, and RZ03-1C4-D005) are functionally equivalent to the ALZ12B05 for applications requiring 5VDC SPDT relay switching at 16A. Selection among these alternatives should be based on the following criteria:

5-1415899-2 (TE Connectivity RZ Series): This part maintains Silver Tin Oxide contact material identical to the original ALZ12B05, providing direct functional equivalence. It carries ROHS3 compliance and MSL 1 rating. Operate time of 8 ms is faster than the original 15 ms specification.

RT314005 (TE Connectivity RT1 Series): This part features Silver Nickel contact material and ROHS3 compliance. Coil current specification of 80.6 mA closely matches the original 80 mA. MSL is not applicable for this part. Operate and release times are 8 ms and 6 ms respectively.

RZ03-1C4-D005 (TE Connectivity RZ Series): This part offers the highest inventory availability (39,553 units) among all substitutes. It features Silver Nickel contact material, ROHS3 compliance, and MSL 1 rating. Coil current is specified at 84 mA. Operate and release times are 8 ms and 6 ms respectively.

All substitute parts are manufactured by TE Connectivity Potter & Brumfield Relays and carry active product status. All meet the -40°C to 85°C operating temperature range and maintain the critical 4.6VDC must-operate and 0.5VDC must-release voltage specifications. Switching voltage ratings of 400VAC are acceptable for applications not exceeding this threshold; applications requiring the full 440VAC capability of the original part should confirm load specifications before substitution.

Frequently Asked Questions (FAQ)

Q: Can the TE Connectivity substitutes be used in place of the Panasonic ALZ12B05 without circuit modification?

A: Yes, all three TE Connectivity parts are direct functional equivalents. They maintain identical coil voltage (5VDC), contact configuration (SPDT), current rating (16A), mounting type (through-hole), and termination style (PC pin). The critical voltage thresholds (4.6VDC must-operate, 0.5VDC must-release) are identical, ensuring compatibility with existing control circuits.

Q: What is the significance of the contact material difference between Silver Tin Oxide and Silver Nickel?

A: Both contact materials are suitable for general purpose relay applications within the specified switching parameters. Silver Tin Oxide (AgSnO) provides excellent resistance to oxidation and is commonly used in dry circuit applications. Silver Nickel (AgNi) offers good wear resistance and is suitable for moderate switching loads. For the 16A, 400-440VAC switching range specified, both materials perform equivalently.

Q: Why do the substitute parts have faster operate times (8 ms) compared to the original ALZ12B05 (15 ms)?

A: Operate time is determined by coil design and magnetic circuit characteristics. The faster response of the TE Connectivity parts reflects design differences between manufacturers but does not affect functional compatibility. Applications sensitive to switching speed should confirm that the faster response time is acceptable for their circuit timing requirements.

Q: Are there any compliance or certification differences between the original and substitute parts?

A: The original ALZ12B05 carries cURus and VDE approvals with RoHS compliance. All substitute parts carry ROHS3 compliance and REACH Unaffected status. Both compliance levels are current standards. The substitute parts from TE Connectivity are manufactured to equivalent quality and regulatory standards appropriate for general purpose relay applications.

Q: Which substitute part should be selected for maximum inventory availability?

A: The RZ03-1C4-D005 offers the highest inventory level at 39,553 units in stock, compared to 3,677 units for the 5-1415899-2 and 1,400 units for the RT314005. If supply chain continuity is a primary concern, the RZ03-1C4-D005 is the optimal choice.

Q: Is the 400VAC switching voltage rating of the substitutes sufficient if the original part is rated for 440VAC?

A: The 400VAC rating of the substitute parts is sufficient for applications operating at or below 400VAC. Applications requiring the full 440VAC capability should confirm that actual load voltages do not exceed 400VAC. For applications with switching voltages between 400VAC and 440VAC, the original ALZ12B05 should be retained.