HD48125 Solid State Relay SPST-NO 125A 48-530V Equivalent & Substitute Parts

Part Overview

The HD48125 is an active Sensata-Crydom solid state relay (SSR) featuring SPST-NO (1 Form A) configuration in a hockey puck package. This component is designed for AC load switching applications with zero-cross detection, rated for 125A load current across a 48V to 530V operating range. The part is RoHS compliant and actively manufactured. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity for applications requiring compatible SPST-NO relay functionality.

Substiute Parts

HD48125

Sensata-CrydomIn Stock: 20418HD48125 Datasheet

Current PartRFQ

84134180

Sensata TechnologiesIn Stock: 86384134180 Datasheet

DirectRFQ

84137180N

CrouzetIn Stock: 121884137180N Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the HD48125 is determined by strict alignment of the following critical parameters:

• Circuit Configuration: SPST-NO (1 Form A) topology required
• Load Current Rating: 125A minimum
• Output Type: AC with zero-cross detection
• Package / Case: Hockey puck form factor
• Mounting Type: Chassis mount
• Termination Style: Screw terminal
• Input Voltage Range: Minimum 3VDC to 32VDC compatibility
• Load Voltage Range: Minimum 48V upper limit; 530V or higher acceptable

The identified substitute parts (84134180 and 84137180N) meet all critical electrical and mechanical parameters. Both substitutes support the same load current (125A), circuit topology (SPST-NO), output type (AC, zero-cross), package style (hockey puck), and termination method (screw terminal). Load voltage ratings of 48V to 660V exceed the HD48125 specification, providing extended operational range. Input voltage specifications (4 ~ 32VDC) are compatible with the HD48125 requirement (3 ~ 32VDC).

Parameter Comparison

Engineering Selection Recommendations

All three parts maintain active product status and meet RoHS compliance requirements. The HD48125 and 84137180N are both RoHS Compliant, while 84134180 carries ROHS3 Compliant certification, indicating enhanced environmental compliance. The 84137180N (Crouzet) is designated as manufacturer-recommended and is REACH Unaffected, providing regulatory advantage in applications subject to REACH restrictions. The 84134180 (Sensata Technologies) is REACH Affected but offers the same electrical performance and extended load voltage range (48V to 660V). Selection should prioritize regulatory requirements and supply chain availability. All three parts are electrically and mechanically interchangeable for SPST-NO 125A AC relay applications within the specified parameter ranges.

Frequently Asked Questions (FAQ)

Q: Can 84134180 or 84137180N be used as direct replacements for HD48125?

A: Yes. Both substitute parts meet all critical electrical parameters: SPST-NO circuit topology, 125A load current, AC zero-cross output, 48V minimum to 660V maximum load voltage range, 4 ~ 32VDC input voltage, screw terminal termination, and hockey puck package. The HD48125 input voltage minimum of 3VDC is slightly lower than the substitutes' 4VDC minimum; verify your application's input voltage does not fall below 4VDC when using substitutes.

Q: What are the key differences between the substitute parts?

A: The primary differences are manufacturer origin and regulatory status. 84134180 is manufactured by Sensata Technologies with ROHS3 and REACH Affected certifications. 84137180N is manufactured by Crouzet with RoHS Compliant and REACH Unaffected status. Both deliver identical electrical performance and load voltage ratings (48V to 660V), exceeding the HD48125 specification.

Q: Are there packaging differences between these parts?

A: Yes. HD48125 is supplied in standard packaging, 84134180 in bulk packaging, and 84137180N in box packaging. All three use the same hockey puck case style and screw terminal configuration. Packaging differences do not affect electrical or mechanical compatibility.

Q: What load voltage range should I verify before substitution?

A: The HD48125 operates from 48V to 530V. Both substitutes extend this range to 48V to 660V. If your application operates above 530V but below 660V, substitutes provide extended capability. If your application operates at or below 530V, all three parts are fully compatible.

Q: Is the input voltage range compatible across all three parts?

A: The HD48125 accepts 3 ~ 32VDC input. Substitutes accept 4 ~ 32VDC input. If your control circuit operates at 3VDC, the HD48125 is required. For 4VDC and above, all three parts are compatible.