ALZ51F48 General Purpose Relay SPST 16A 48VDC - Equivalent & Substitute Parts

Part Overview

The ALZ51F48 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 48VDC coil. This through-hole mounted relay is designed for applications requiring 16A contact rating at switching voltages up to 440VAC maximum. The part is currently active in production with 634 units in stock. Equivalent and substitute parts are necessary when the primary part becomes unavailable, when alternative packaging formats are required, or when design flexibility across approved component sources is needed.

Substiute Parts

ALZ51F48

Panasonic Electric WorksIn Stock: 689ALZ51F48 Datasheet

Current PartRFQ

1-1415898-1

TE Connectivity Potter & Brumfield RelaysIn Stock: 8321-1415898-1 Datasheet

SimilarRFQ

1-1415899-8

TE Connectivity Potter & Brumfield RelaysIn Stock: 9361-1415899-8 Datasheet

SimilarRFQ

RT33K048

TE Connectivity Potter & Brumfield RelaysIn Stock: 1125RT33K048 Datasheet

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RT33L048

TE Connectivity Potter & Brumfield RelaysIn Stock: 1621RT33L048 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ALZ51F48 is determined by strict equivalence across the following critical parameters:

• Coil voltage: 48VDC (exact match required)
• Contact form: SPST-NO (1 Form A) (exact match required)
• Contact rating: 16 A (exact match required)
• Mounting type: Through Hole (exact match required)
• Termination style: PC Pin (exact match required)
• Coil type: Non Latching (exact match required)
• Coil insulation class: Class F (exact match required)
• Must operate voltage: 33.6 VDC (exact match required)
• Must release voltage: 4.8 VDC (exact match required)
• Moisture sensitivity level: 1 (Unlimited) (exact match required)

All four substitute parts listed (RT33L048, RT33K048, 1-1415899-8, 1-1415898-1) meet these critical parameters. Variations in switching voltage maximum, coil current, operate/release times, contact material composition, operating temperature upper limit, and seal rating do not disqualify substitution but represent design trade-offs documented in the parameter comparison table.

Parameter Comparison

Engineering Selection Recommendations

All four substitute parts are active products with current production status and full RoHS compliance. Selection between the ALZ51F48 and its substitutes should be based on the following considerations:

Temperature Range Requirement: The ALZ51F48 supports an operating temperature range of -40°C to 105°C, while all TE Connectivity substitutes are rated to -40°C to 85°C. Applications requiring operation above 85°C must use the ALZ51F48.

Switching Voltage Specification: The ALZ51F48 is rated for 440VAC maximum switching voltage, while all substitutes are rated for 400VAC maximum. Applications requiring switching voltages between 400VAC and 440VAC must use the ALZ51F48.

Packaging Format: The ALZ51F48, RT33K048, and RT33L048 are supplied in tube packaging. Part 1-1415899-8 is supplied in bulk packaging and may be selected when bulk quantities are preferred or when tube packaging is not required.

Seal Rating: Part 1-1415899-8 does not specify a seal rating, while the ALZ51F48 and all other substitutes provide sealed flux protection. Applications requiring sealed flux protection should exclude 1-1415899-8.

Operate/Release Time Performance: The ALZ51F48 has an operate time of 15 ms and release time of 5 ms. All TE Connectivity substitutes offer faster operate times (8-10 ms) and comparable or slightly longer release times (5-6 ms). Applications with timing-critical requirements should evaluate these differences against circuit design specifications.

Inventory Availability: RT33L048 offers the highest current inventory (1601 units), followed by RT33K048 (1105 units), 1-1415899-8 (861 units), and 1-1415898-1 (761 units).

Frequently Asked Questions (FAQ)

Q: Can I substitute an ALZ51F48 with a TE Connectivity RT33L048 in my circuit?

A: Yes, provided your application does not require operation above 85°C or switching voltages above 400VAC. The RT33L048 meets all critical electrical parameters including coil voltage, contact form, contact rating, must-operate and must-release voltages, and coil insulation class. The faster operate time (9 ms vs. 15 ms) may benefit timing-sensitive circuits.

Q: What is the difference between the four substitute parts?

A: All four substitutes meet the core electrical requirements. The primary differences are: 1-1415898-1 and RT33K048 use Silver Nickel contact material while RT33L048 uses Silver Tin Oxide; 1-1415899-8 is supplied in bulk packaging rather than tubes and does not specify a seal rating; RT33L048 has the highest current inventory; operate times range from 8 ms to 10 ms across the substitutes.

Q: If my application operates at 430VAC, which parts can I use?

A: Only the ALZ51F48, which is rated for 440VAC maximum switching voltage. All TE Connectivity substitutes are rated for 400VAC maximum and are not suitable for this application.

Q: Does the difference in coil current (8.3 mA vs. 8.7 mA) affect circuit design?

A: The coil current differences are minor (0.4 mA maximum variation) and fall within typical circuit design tolerances. Verify that your coil drive circuit can supply the specified coil current for the selected part. The coil resistance values are also similar (5.52-5.76 kOhms), indicating compatible drive characteristics.

Q: Can I use part 1-1415899-8 in applications requiring sealed flux protection?

A: No. Part 1-1415899-8 does not specify a seal rating. If sealed flux protection is required, select from ALZ51F48, 1-1415898-1, RT33K048, or RT33L048.

Q: Are all these parts RoHS compliant?

A: Yes. The ALZ51F48 is RoHS Compliant. All four TE Connectivity substitutes are ROHS3 Compliant, which represents a more recent RoHS standard revision and is fully compatible with RoHS requirements.