HG4-DC48V Equivalent & Substitute Parts

Part Overview

The HG4-DC48V is a general purpose relay manufactured by Panasonic Electric Works, featuring a 4PDT (4 Form C) contact configuration with a 48VDC coil and 20A contact rating. This socketable relay is designed for switching applications requiring multiple independent circuits. The product is currently obsolete, making equivalent substitute parts necessary for system maintenance, repair, and legacy equipment support.

Substiute Parts

HG4-DC48V

Panasonic Electric WorksIn Stock: 828HG4-DC48V Datasheet

Current PartRFQ

PT570048

TE Connectivity Potter & Brumfield RelaysIn Stock: 1183PT570048 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the HG4-DC48V is determined by the following critical parameters:

• Coil Voltage: Both main and substitute parts operate at 48VDC, ensuring direct coil compatibility
• Contact Form: Both maintain 4PDT (4 Form C) configuration, preserving circuit switching capability
• Mounting Type: Both are socketable, allowing physical and electrical interchangeability in existing sockets
• Coil Type: Both are non-latching, maintaining identical operational behavior
• Relay Type: Both are general purpose relays, confirming functional equivalence

The PT570048 qualifies as a substitute part based on these core parameters. Differences in contact rating, coil current, and operating temperature range represent trade-offs that must be evaluated for specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The PT570048 is an active product from TE Connectivity Potter & Brumfield Relays and serves as a functional substitute for the obsolete HG4-DC48V. Both relays share identical coil voltage, contact form, mounting type, and coil type specifications.

Selection of the PT570048 as a replacement requires evaluation of the following differences:

• Contact Rating: The PT570048 is rated for 6A maximum, compared to the HG4-DC48V's 20A rating. Applications requiring currents exceeding 6A cannot use this substitute.
• Operating Temperature: The PT570048 supports -40°C to 70°C, extending the upper temperature limit compared to the HG4-DC48V's -50°C to 40°C range. Applications requiring operation below -40°C cannot use this substitute.
• Termination Connector Size: The PT570048 uses 0.110" (2.8mm) quick connect terminals, while the HG4-DC48V uses 0.250" (6.3mm) terminals. Socket compatibility must be confirmed before substitution.
• Coil Current: The PT570048 draws 15.6mA compared to 45.7mA for the HG4-DC48V, resulting in lower power consumption and reduced coil heating.

Both parts maintain REACH Unaffected and EAR99 compliance status.

Frequently Asked Questions (FAQ)

Q: Can the PT570048 directly replace the HG4-DC48V in all applications?

A: No. The PT570048 has a lower contact current rating (6A vs. 20A) and different operating temperature limits (-40°C to 70°C vs. -50°C to 40°C). Applications must operate within these reduced specifications. Additionally, the termination connector size differs (0.110" vs. 0.250"), requiring socket compatibility confirmation.

Q: What is the primary reason for substitution?

A: The HG4-DC48V is obsolete. The PT570048 is an active product with identical coil voltage, contact form, and mounting type, making it suitable for applications that can accommodate the specified parameter differences.

Q: Are there compatibility concerns with the socketable mounting?

A: Both relays are socketable and use quick connect termination. However, the connector pin sizes differ (0.110" vs. 0.250"). The relay socket must accommodate the PT570048's smaller pin diameter for proper electrical and mechanical connection.

Q: How do the coil specifications compare?

A: The PT570048 has higher coil resistance (3.07 kOhms vs. 1.05 kOhms) and lower coil current (15.6mA vs. 45.7mA). This results in lower power consumption and reduced heat generation. The must-operate voltage is slightly lower (36VDC vs. 38.4VDC), while the must-release voltage remains identical at 4.8VDC.

Q: What are the switching speed differences?

A: The PT570048 operates faster, with 15ms operate time and 10ms release time, compared to 25ms for both parameters on the HG4-DC48V. This faster response may affect timing-sensitive applications.

Q: Are both parts compliant with environmental regulations?

A: Yes. Both the HG4-DC48V and PT570048 are REACH Unaffected and classified as EAR99 for export control purposes.