HL2-HTM-AC48V Equivalent & Substitute Parts

Part Overview

The HL2-HTM-AC48V is a general purpose relay manufactured by Panasonic Electric Works, featuring a DPDT (2 Form C) contact configuration with 10A contact rating and 48VAC coil voltage. This relay is designed for chassis mount applications with quick connect termination. The product is currently obsolete, making identification of suitable substitute components essential for system maintenance, repair, and redesign applications where continued functionality is required.

Substiute Parts

HL2-HTM-AC48V

Panasonic Electric WorksIn Stock: 902HL2-HTM-AC48V Datasheet

Current PartRFQ

LY2-DC48

Omron Automation and SafetyIn Stock: 1053LY2-DC48 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

The LY2-DC48 from Omron Automation and Safety qualifies as a functional substitute based on the following critical parameters:

Matching Parameters:

• Contact Form: DPDT (2 Form C) — identical switching configuration
• Contact Rating (Current): 10 A — equivalent load capacity
• Contact Material: Silver Alloy — same contact composition
• Coil Type: Non Latching — identical operational behavior
• Relay Type: General Purpose — same functional classification

Substitution Basis: The LY2-DC48 maintains electrical equivalence through identical contact configuration and current rating. Both relays operate as general purpose DPDT devices with silver alloy contacts and non-latching coil behavior. The primary difference is coil voltage specification: the HL2-HTM-AC48V operates on 48VAC while the LY2-DC48 operates on 48VDC. This substitution is valid only in applications where the control circuit can supply 48VDC instead of 48VAC, or where a separate power supply conversion is implemented.

Parameter Comparison

Engineering Selection Recommendations

The LY2-DC48 is available as an active product from Omron Automation and Safety, providing supply continuity for applications requiring DPDT 10A general purpose relay functionality. The LY2-DC48 is RoHS compliant, addressing modern regulatory requirements that the obsolete HL2-HTM-AC48V does not specify.

Selection of the LY2-DC48 as a substitute requires the following engineering considerations:

Coil Voltage Conversion: The control circuit must supply 48VDC instead of 48VAC. This may require power supply modification or the addition of a rectification stage in existing 48VAC systems.

Mounting and Termination: The LY2-DC48 uses socketable mounting with plug-in termination, differing from the chassis mount quick connect design of the HL2-HTM-AC48V. Mechanical integration into existing enclosures or PCB layouts must be evaluated.

Timing Characteristics: The LY2-DC48 has longer operate and release times (25 ms versus 10 ms). Applications with strict timing requirements must confirm compatibility with the slower switching response.

Temperature Range: The LY2-DC48 operates within -25°C to 55°C, which is narrower than the HL2-HTM-AC48V range of -50°C to 70°C. Applications requiring operation below -25°C or above 55°C cannot use this substitute.

Frequently Asked Questions (FAQ)

Q: Can the LY2-DC48 directly replace the HL2-HTM-AC48V without circuit modifications?

A: No. The LY2-DC48 requires 48VDC coil voltage while the HL2-HTM-AC48V requires 48VAC. The control circuit must be modified to supply the correct voltage type. Additionally, mounting and termination methods differ and require mechanical redesign.

Q: What is the primary electrical difference between these two relays?

A: Both relays have identical DPDT contact configuration and 10A current rating. The main difference is coil voltage: AC versus DC. The LY2-DC48 also has lower coil current (18.5 mA versus 25 mA) and slower switching times (25 ms versus 10 ms).

Q: Is the LY2-DC48 suitable for applications requiring fast switching response?

A: The LY2-DC48 has operate and release times of 25 ms, compared to 10 ms for the HL2-HTM-AC48V. Applications requiring response times faster than 25 ms cannot use the LY2-DC48.

Q: What are the temperature operating limits for the LY2-DC48?

A: The LY2-DC48 operates between -25°C and 55°C. The HL2-HTM-AC48V operates between -50°C and 70°C. If your application requires operation outside the -25°C to 55°C range, the LY2-DC48 is not suitable.

Q: Does the LY2-DC48 meet modern regulatory compliance standards?

A: Yes. The LY2-DC48 is RoHS compliant and has active product status. The obsolete HL2-HTM-AC48V does not specify RoHS compliance.

Q: What mounting changes are required when switching from HL2-HTM-AC48V to LY2-DC48?

A: The HL2-HTM-AC48V uses chassis mount with quick connect 0.187" (4.7mm) termination. The LY2-DC48 uses socketable mounting with plug-in termination. Mechanical redesign of the mounting structure and termination connections is required.