HC4ED-PL-AC48V Equivalent & Substitute Parts

Part Overview

The HC4ED-PL-AC48V is a general purpose relay manufactured by Panasonic Electric Works, featuring a 4PDT (4 Form C) contact configuration with 1A contact rating and 48VAC coil voltage. This through-hole mounted relay is designed for industrial control applications requiring multiple independent switching circuits. The product is currently obsolete, making identification of compatible substitute parts essential for system maintenance, repair, and redesign applications where continued availability is required.

Substiute Parts

HC4ED-PL-AC48V

Panasonic Electric WorksIn Stock: 860HC4ED-PL-AC48V Datasheet

Current PartRFQ

PT571548

TE Connectivity Potter & Brumfield RelaysIn Stock: 1165PT571548 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the HC4ED-PL-AC48V is determined by strict alignment of the following critical parameters:

• Coil Voltage: 48VAC (exact match required)
• Contact Form: 4PDT (4 Form C) configuration (exact match required)
• Mounting Type: Through Hole (exact match required)
• Termination Style: PC Pin (exact match required)
• Coil Type: Non Latching (exact match required)

The PT571548 manufactured by TE Connectivity Potter & Brumfield Relays satisfies all mandatory substitution criteria. While the PT571548 provides a higher contact rating (6A versus 1A) and extended operating temperature range (-40°C ~ 70°C versus -40°C ~ 60°C), these represent functional improvements that maintain backward compatibility with the original HC4ED-PL-AC48V specification. The higher current rating ensures the substitute can handle all applications within the original part's design envelope.

Parameter Comparison

Engineering Selection Recommendations

The PT571548 is the qualified substitute for the obsolete HC4ED-PL-AC48V based on the following engineering criteria:

Product Status & Availability: The HC4ED-PL-AC48V is obsolete, while the PT571548 maintains active production status, ensuring long-term availability and supply chain continuity.

Compliance & Certifications: Both parts share identical ECCN (EAR99) and HTSUS (8536.41.0020) classifications. The PT571548 carries RoHS3 compliance certification, meeting modern regulatory requirements for new designs and system upgrades.

Functional Compatibility: The PT571548 maintains all critical electrical parameters required for direct substitution: 48VAC coil voltage, 4PDT contact configuration, non-latching operation, and PC pin termination. The substitute's 6A contact rating exceeds the original 1A specification, providing enhanced capability without compromising compatibility with existing circuit designs.

Operating Envelope: The PT571548 extends the operating temperature range to -70°C maximum, providing improved performance in extended temperature applications while maintaining the -40°C minimum specification of the original part.

Frequently Asked Questions (FAQ)

Q: Can the PT571548 directly replace the HC4ED-PL-AC48V in existing circuit boards?

A: Yes. Both relays share identical coil voltage (48VAC), contact configuration (4PDT), mounting type (through hole), and termination style (PC pin). The PT571548 is a direct pin-compatible substitute with no circuit modifications required.

Q: What is the significance of the higher 6A contact rating on the PT571548 compared to the 1A rating of the HC4ED-PL-AC48V?

A: The PT571548's 6A rating indicates higher current-carrying capacity per contact. This represents a functional improvement that maintains backward compatibility. Any application designed for 1A operation will function correctly with the 6A-rated substitute without circuit redesign.

Q: Are there any differences in switching voltage specifications between these relays?

A: The HC4ED-PL-AC48V specifies 250VAC maximum switching voltage, while the PT571548 specifies 240VAC maximum. Both ratings are suitable for standard industrial control applications operating at 120VAC or 240VAC. The difference is negligible for typical applications.

Q: Does the PT571548 meet current regulatory compliance standards?

A: Yes. The PT571548 carries RoHS3 compliance certification, meeting current environmental and regulatory requirements. Both parts share identical ECCN and HTSUS classifications for export control purposes.

Q: What is the operating temperature difference, and does it affect substitution suitability?

A: The HC4ED-PL-AC48V operates from -40°C to 60°C, while the PT571548 operates from -40°C to 70°C. The PT571548 provides an extended upper temperature limit, making it suitable for applications requiring operation at elevated temperatures while maintaining full compatibility with standard temperature range applications.

Q: Are the contact materials compatible between these two relays?

A: The HC4ED-PL-AC48V uses Silver Nickel (AgNi) and Gold (Au) contact materials, while the PT571548 uses Silver Nickel (AgNi). Both materials are standard for general purpose relay applications and provide equivalent performance for industrial control switching.

Q: What is the coil resistance of the PT571548?

A: The PT571548 has a coil resistance of 777 Ohms, which aligns with the 48VAC coil voltage and 25mA coil current specification of the original HC4ED-PL-AC48V design.