SSR Relay SPST-NO 125A 48-660V Solid State Switch (84137181)

Part Overview

The Sensata Technologies 84137181 is a solid-state relay (SSR) with SPST-NO (Single Pole Single Throw - Normally Open) configuration, rated for 125A load current across 48V to 660V AC output. This hockey puck-style chassis mount relay features zero-cross switching for AC applications and accepts 90-280VAC input control voltage. The part is active in production with RoHS compliance and unlimited moisture sensitivity rating (MSL 1). Finding equivalent substitutes is necessary for supply chain continuity, regional availability, or procurement optimization while maintaining identical electrical and mechanical performance.

Substiute Parts

84137181

Sensata TechnologiesIn Stock: 92084137181 Datasheet

Current PartRFQ

84137181N

CrouzetIn Stock: 97984137181N Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 84137181 is determined by strict equivalence across the following critical parameters:

• Circuit topology: SPST-NO (1 Form A) configuration
• Load current capacity: 125 A minimum
• Load voltage range: 48 V to 660 V AC operation
• Output switching type: AC with zero-cross detection
• Mechanical form factor: Hockey puck chassis mount package with screw terminals
• Compliance certifications: RoHS compliance and MSL 1 rating

The substitute part 84137181N (Crouzet) meets all these criteria. While the input control voltage range differs slightly (20–265VAC versus 90–280VAC), this represents an expanded operational window that maintains full compatibility with the original specification. Both parts share identical load ratings, circuit configuration, output type, and physical packaging.

Parameter Comparison

Engineering Selection Recommendations

Both the 84137181 (Sensata Technologies) and 84137181N (Crouzet) are active production parts with full RoHS compliance and identical MSL 1 ratings. Selection between these parts should be based on:

• Supply availability: The Crouzet variant (84137181N) currently has 928 units in stock versus 846 units for the Sensata part
• Packaging format: Sensata ships in bulk packaging; Crouzet ships in box packaging
• Input voltage margin: The Crouzet part accepts a wider input control voltage range (20–265VAC), providing additional operational flexibility in applications with variable control voltage sources
• Regulatory classification: Both parts carry identical ECCN (EAR99) export control status

No performance degradation or functional compromise occurs when substituting between these parts within their specified electrical and mechanical parameters.

Frequently Asked Questions (FAQ)

Q: Can the Crouzet 84137181N directly replace the Sensata 84137181 in existing designs?

A: Yes. Both parts are electrically and mechanically equivalent across all critical parameters: 125A load current, 48–660V load voltage range, SPST-NO circuit configuration, AC zero-cross output, and hockey puck chassis mount form factor with screw terminals.

Q: Does the different input voltage range (20–265VAC for Crouzet vs. 90–280VAC for Sensata) affect compatibility?

A: No. The Crouzet part's expanded input range is a superset of the Sensata specification. Any control voltage within the original 90–280VAC window will operate identically on both parts. The Crouzet variant simply permits operation at lower input voltages if required by the application.

Q: Are there packaging differences between these parts?

A: Yes. The Sensata 84137181 is supplied in bulk packaging, while the Crouzet 84137181N is supplied in box packaging. Both use identical screw terminal connections and hockey puck form factors. Packaging format does not affect electrical or mechanical performance.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the 84137181 and 84137181N are RoHS compliant, carry MSL 1 (unlimited moisture sensitivity) ratings, and share identical ECCN (EAR99) export control classification.

Q: Which part should be selected for new designs?

A: Selection should be based on current supply availability, preferred packaging format, and control voltage requirements. Both parts are active production items with no functional or performance differences within the specified operating parameters.