OSSRA0008A Solid State Relay - Equivalent & Substitute Parts

Part Overview

The OSSRA0008A is a solid state relay (SSR) manufactured by TT Electronics/Optek Technology, configured as a SPST-NO (1 Form A) device in a Hockey Puck package. This component is designed for AC load switching applications with zero-cross detection, operating at input voltages between 100–240VAC and load voltages from 50–250V at 15A capacity. The product is currently obsolete, making identification of compatible substitute components essential for system maintenance, repair, and redesign applications.

Substiute Parts

OSSRA0008A

TT Electronics/Optek TechnologyIn Stock: 1196OSSRA0008A Datasheet

Current PartRFQ

84134111

Sensata-CrydomIn Stock: 116284134111 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the OSSRA0008A is determined by the following critical parameters:

• Circuit Configuration: Must be SPST-NO (1 Form A) to maintain identical switching logic
• Output Type: Must be AC with zero-cross detection for synchronized load switching
• Mounting Type: Must be Chassis Mount to fit existing mechanical installations
• Package / Case: Must be Hockey Puck to ensure physical compatibility with mounting hardware
• Termination Style: Must be Screw Terminal for direct connection compatibility
• Voltage Ratings: Load voltage range and input voltage range must encompass or match the original specifications
• Load Current: Must meet or exceed the 15A requirement
• Compliance: RoHS3 compliance is required for regulatory alignment

The substitute part 84134111 (Sensata-Crydom GN series) meets all these criteria while offering enhanced electrical specifications.

Parameter Comparison

Engineering Selection Recommendations

The 84134111 (Sensata-Crydom GN series) is the qualified substitute for the OSSRA0008A based on the following engineering criteria:

Functional Equivalence: Both components share identical circuit configuration (SPST-NO), output type (AC with zero-cross detection), mounting type (Chassis Mount), termination style (Screw Terminal), and package form factor (Hockey Puck). These parameters ensure direct mechanical and electrical compatibility.

Electrical Compatibility: The 84134111 provides enhanced electrical specifications that fully encompass the OSSRA0008A operating range. The input voltage range (90–280VAC) includes the original 100–240VAC specification. The load voltage range (48–660V) exceeds the original 50–250V range. The load current rating (25A) exceeds the original 15A requirement, providing operational margin.

Product Status and Compliance: The OSSRA0008A is obsolete, making the active-status 84134111 the appropriate long-term solution. Both components maintain ROHS3 compliance, ensuring regulatory alignment for new designs and replacements.

Availability and Supply Chain: The 84134111 is currently in active production with confirmed inventory availability, eliminating supply chain risk associated with obsolete component sourcing.

Frequently Asked Questions (FAQ)

Q: Can the 84134111 directly replace the OSSRA0008A in existing installations?

A: Yes. Both components share identical circuit configuration, output type, mounting type, termination style, and package form factor. The 84134111 provides equal or superior electrical performance across all specified parameters.

Q: What are the key differences between these two relays?

A: The primary differences are manufacturer (TT Electronics/Optek vs. Sensata-Crydom), product status (Obsolete vs. Active), and electrical ratings. The 84134111 offers higher input voltage tolerance (90–280VAC vs. 100–240VAC), extended load voltage range (48–660V vs. 50–250V), and higher load current capacity (25A vs. 15A).

Q: Are there any mechanical compatibility concerns?

A: No. Both components use the Hockey Puck package form factor with Chassis Mount configuration and Screw Terminal termination. Physical installation and connection methods are identical.

Q: Does the higher current rating of the 84134111 affect circuit operation?

A: No. The 84134111 is rated for 25A maximum load current, while the OSSRA0008A is rated for 15A. In applications using 15A or less, the 84134111 operates within its safe operating range with no adverse effects.

Q: Are both components RoHS compliant?

A: Yes. Both the OSSRA0008A and 84134111 are ROHS3 compliant, meeting current environmental and regulatory requirements.

Q: What is the significance of the zero-cross output type?

A: Zero-cross detection ensures the relay switches AC loads at the zero-voltage point of the AC waveform, minimizing electromagnetic interference and reducing stress on connected components. Both the OSSRA0008A and 84134111 incorporate this feature.