HC3-HP-DC48V General Purpose Relay 3PDT 48VDC

Part Overview

The HC3-HP-DC48V is a general purpose relay manufactured by Panasonic Electric Works, featuring a 3PDT (3 Form C) contact configuration with a 48VDC coil. This through-hole mounted relay is rated for 7A at 250VAC maximum switching voltage and operates with a coil current of 18.5 mA. The product is currently obsolete, making identification of compatible substitute components essential for ongoing system maintenance and new design implementations where equivalent functionality is required.

Substiute Parts

HC3-HP-DC48V

Panasonic Electric WorksIn Stock: 749HC3-HP-DC48V Datasheet

Current PartRFQ

MY3-02-DC48

Omron Automation and SafetyIn Stock: 783MY3-02-DC48 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the HC3-HP-DC48V is determined by the following critical parameters that must remain constant or compatible:

• Coil Voltage: 48VDC (exact match required)
• Contact Form: 3PDT (3 Form C) configuration (exact match required)
• Coil Current: 18.5 mA (exact match required)
• Coil Resistance: 2.6 kOhms (exact match required)
• Mounting Type: Through Hole (exact match required)
• Termination Style: PC Pin (exact match required)
• Must Operate Voltage: 38.4 VDC (exact match required)
• Must Release Voltage: 4.8 VDC (exact match required)

The MY3-02-DC48 from Omron Automation and Safety meets all critical substitution criteria. While the contact rating differs (5A versus 7A), this represents a derating that is acceptable in substitution scenarios where the original 7A specification is not a limiting constraint in the application circuit.

Parameter Comparison

Engineering Selection Recommendations

The MY3-02-DC48 is the qualified substitute for the HC3-HP-DC48V. Selection of this substitute is supported by the following factors:

• Product Status: The MY3-02-DC48 maintains Active status, ensuring continued availability and supply chain reliability compared to the obsolete HC3-HP-DC48V.
• Compliance: The MY3-02-DC48 is RoHS Compliant, meeting current environmental and regulatory requirements.
• Electrical Equivalence: All critical electrical parameters match exactly, including coil voltage, contact form, coil current, coil resistance, and operating thresholds.
• Mechanical Compatibility: Through-hole mounting and PC pin termination are identical, enabling direct board-level substitution.

The contact current rating reduction from 7A to 5A requires circuit-level verification to confirm that application current demands do not exceed the 5A specification. The extended operating temperature range (-55°C versus -50°C) of the MY3-02-DC48 provides additional environmental margin. Increased operate and release times (20 ms versus 10 ms and 5 ms respectively) must be evaluated against timing-critical application requirements.

Frequently Asked Questions (FAQ)

Q: Can the MY3-02-DC48 be used as a direct replacement for the HC3-HP-DC48V without circuit modifications?

A: The MY3-02-DC48 is mechanically and electrically compatible for direct board-level substitution. However, the reduced contact current rating (5A versus 7A) and increased switching times (20 ms operate and release versus 10 ms and 5 ms) require verification that application requirements do not exceed these specifications.

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

A: The HC3-HP-DC48V is rated for 7A maximum contact current, while the MY3-02-DC48 is rated for 5A. If the application circuit operates at currents between 5A and 7A, the MY3-02-DC48 cannot be used. Applications operating below 5A are unaffected by this difference.

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

A: The HC3-HP-DC48V is rated for 250VAC maximum switching voltage. The MY3-02-DC48 supports both 250VAC and 125VDC, providing expanded voltage switching capability. Both relays are compatible for 250VAC applications.

Q: How do the operating and release times affect substitution suitability?

A: The HC3-HP-DC48V operates in 10 ms with 5 ms release time, while the MY3-02-DC48 requires 20 ms for both operations. Applications with timing-critical functions or high-speed switching requirements must confirm that the doubled switching times are acceptable.

Q: What packaging considerations apply to this substitution?

A: Both relays feature identical through-hole mounting with PC pin termination. The MY3-02-DC48 is supplied in bulk packaging, consistent with standard component procurement practices.

Q: Does RoHS compliance status affect substitution decisions?

A: The MY3-02-DC48 is RoHS Compliant, meeting current environmental regulations. For new designs or systems requiring RoHS compliance, the MY3-02-DC48 is the appropriate selection. For legacy system maintenance, compliance requirements depend on application context and regulatory jurisdiction.