HC4-HPL-AC24V Equivalent & Substitute Parts

Part Overview

The HC4-HPL-AC24V is a general purpose relay manufactured by Panasonic Electric Works, featuring a 4PDT (4 Form C) contact configuration with a 24VAC coil. This through-hole mounted relay is designed for applications requiring simultaneous switching of four independent circuits at 5A per contact. The product is currently obsolete, making identification of compatible substitute parts essential for maintenance, repair, and legacy system support.

Substiute Parts

HC4-HPL-AC24V

Panasonic Electric WorksIn Stock: 1132HC4-HPL-AC24V Datasheet

Current PartRFQ

PT571524

TE Connectivity Potter & Brumfield RelaysIn Stock: 978PT571524 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the HC4-HPL-AC24V is determined by the following critical parameters:

• Coil voltage must be 24VAC
• Contact configuration must be 4PDT (4 Form C)
• Mounting type must be through hole with PC pin termination
• Must operate and release voltage thresholds must be compatible (19.2 VAC / 7.2 VAC)
• Contact current rating must meet or exceed 5A minimum requirement
• Maximum switching voltage must support 240VAC or higher

The PT571524 from TE Connectivity Potter & Brumfield Relays meets these substitution criteria with a higher contact current rating of 6A and equivalent coil voltage specifications.

Parameter Comparison

Engineering Selection Recommendations

The PT571524 is a direct functional substitute for the HC4-HPL-AC24V based on matching coil voltage, contact configuration, and operating thresholds. The PT571524 offers the following advantages:

• Active product status ensures ongoing availability and supply chain continuity
• Higher contact current rating (6A vs 5A) provides additional margin for existing applications
• ROHS3 compliance supports modern manufacturing and environmental standards
• Extended upper operating temperature limit (-40°C ~ 70°C vs -50°C ~ 60°C) accommodates broader thermal environments

Both relays share identical must-operate and must-release voltage specifications, ensuring compatible control circuit performance. The PT571524 maintains PC pin through-hole termination, allowing direct PCB mounting compatibility.

Frequently Asked Questions (FAQ)

Q: Can the PT571524 replace the HC4-HPL-AC24V in existing applications?

A: Yes. Both relays share identical coil voltage (24VAC), contact configuration (4PDT), operating thresholds (19.2 VAC / 7.2 VAC), and termination style (PC pin through hole). The PT571524 has a higher contact current rating (6A), which is compatible with applications designed for 5A.

Q: What is the difference in contact current rating between these relays?

A: The HC4-HPL-AC24V is rated at 5A per contact, while the PT571524 is rated at 6A per contact. The higher rating of the PT571524 does not affect compatibility; it simply provides additional current-carrying capacity.

Q: Are there any temperature range considerations?

A: The HC4-HPL-AC24V operates from -50°C to 60°C, while the PT571524 operates from -40°C to 70°C. For applications within the -40°C to 60°C range, both relays are suitable. Applications requiring operation below -40°C would require the original HC4-HPL-AC24V or alternative parts with extended low-temperature ratings.

Q: What is the significance of the PT571524 being ROHS3 compliant?

A: ROHS3 compliance indicates the PT571524 meets current environmental and manufacturing standards for restricted hazardous substances. This is relevant for new designs and applications subject to regulatory compliance requirements.

Q: Are the switching voltage specifications compatible?

A: The HC4-HPL-AC24V supports 250VAC maximum switching voltage, while the PT571524 supports 240VAC maximum. Both specifications are suitable for standard industrial control applications operating at 120VAC or 240VAC. Applications requiring switching above 240VAC would need verification against specific circuit requirements.