OSSRD2002A Equivalent & Substitute Parts

Part Overview

The OSSRD2002A is a solid-state relay (SSR) manufactured by TT Electronics/Optek Technology, configured as a SPST-NO (1 Form A) device in a 4-SIP package. This component is designed for AC load switching applications with zero-cross detection, operating with a 4–32 VDC input and supporting loads up to 250 V at 3 A. The product is currently obsolete, making equivalent substitutes necessary for ongoing system maintenance and new designs requiring compatible SSR functionality.

Substiute Parts

OSSRD2002A

TT Electronics/Optek TechnologyIn Stock: 1061OSSRD2002A Datasheet

Current PartRFQ

D2W203F-11

Sensata-CrydomIn Stock: 1028D2W203F-11 Datasheet

MFR RecommendedRFQ

D2W203F-11

Sensata-CrydomIn Stock: 1028D2W203F-11 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the OSSRD2002A is determined by the following critical parameters:

• Circuit Configuration: Must be SPST-NO (1 Form A) to maintain identical switching topology
• Output Type: Must support AC switching with zero-cross detection for compatible load control
• Package / Case: Must be 4-SIP to ensure mechanical and electrical compatibility with existing PCB layouts
• Mounting Type: Must be Through Hole to match board assembly requirements
• Termination Style: Must use PC Pin connections for direct socket compatibility
• Input Voltage Range: Must encompass or exceed the 4–32 VDC operating range
• Load Voltage Range: Must support the 50–250 V load specification
• Load Current: Must meet or exceed the 3 A requirement
• Compliance: Must maintain ROHS3 compliance and REACH unaffected status

The D2W203F-11 from Sensata-Crydom meets all substitution criteria and is classified as an active product, providing long-term availability and supply chain stability.

Parameter Comparison

Engineering Selection Recommendations

The D2W203F-11 is the qualified substitute for the OSSRD2002A based on the following engineering criteria:

• Functional Equivalence: Both devices share identical circuit configuration (SPST-NO), output type (AC with zero-cross detection), package format (4-SIP), and termination style (PC Pin), ensuring direct functional replacement in existing designs.
• Enhanced Electrical Performance: The D2W203F-11 provides superior electrical specifications, including extended input voltage range (3–32 VDC vs. 4–32 VDC), expanded load voltage range (24–280 V vs. 50–250 V), and increased load current capacity (4.6 A vs. 3 A).
• Regulatory Compliance: Both parts maintain ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements.
• Supply Chain Continuity: The D2W203F-11 is an active product with confirmed inventory availability, eliminating obsolescence risk associated with the OSSRD2002A.
• Mechanical Compatibility: Identical package, mounting type, and termination ensure direct PCB compatibility without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the D2W203F-11 be used as a direct replacement for the OSSRD2002A without PCB modifications?

A: Yes. Both devices use the 4-SIP package with PC Pin termination and identical through-hole mounting, allowing direct socket substitution without PCB layout changes.

Q: What are the key differences between these two SSR devices?

A: The primary differences are manufacturer origin and electrical performance envelope. The D2W203F-11 extends the input voltage range to 3 VDC minimum (vs. 4 VDC), supports load voltages as low as 24 V (vs. 50 V), and provides 4.6 A load current capacity (vs. 3 A). Both maintain identical circuit topology and output characteristics.

Q: Is the D2W203F-11 suitable for applications originally designed for the OSSRD2002A?

A: Yes. The D2W203F-11 meets or exceeds all electrical parameters of the OSSRD2002A. Applications operating within the original OSSRD2002A specifications will function identically with the D2W203F-11.

Q: Are there any compliance or certification concerns with substitution?

A: No. Both parts maintain ROHS3 compliance and REACH unaffected status. Regulatory and environmental certifications are equivalent.

Q: Why is the OSSRD2002A obsolete?

A: The OSSRD2002A is classified as obsolete by the manufacturer. The D2W203F-11 is an active product with ongoing manufacturing support, ensuring long-term availability and supply chain stability.

Q: Does the D2W203F-11 support the same zero-cross detection functionality?

A: Yes. Both devices feature AC output type with zero-cross detection, maintaining identical switching behavior for AC load control applications.