CT335 Equivalent & Substitute Parts

Part Overview

The CT335 is a Solid State Relay (SSR) with SPST-NO (1 Form A) configuration manufactured by Coto Technology in the COTOMOS™ series. This component operates as a 2-channel 8-DIP through-hole relay module rated for 0-80V load voltage and 80mA load current with a 1.37VDC input signal requirement. The CT335 is classified as obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations where equivalent functionality is required.

Substiute Parts

CT335

Coto TechnologyIn Stock: 2196CT335 Datasheet

Current PartRFQ

VOR2142A8

Vishay Semiconductor Opto DivisionIn Stock: 2963VOR2142A8 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The VOR2142A8 qualifies as a direct substitute for the CT335 based on the following critical parameters that determine substitutability:

Package Compatibility: Both components utilize identical 8-DIP (0.300", 7.62mm) through-hole packaging with PC pin termination, enabling direct pinout-compatible installation on existing PCBs.

Circuit Configuration: Both parts provide SPST-NO (1 Form A) x 2 relay configurations with dual-channel functionality.

Input Signal Compatibility: Input voltage specifications are nearly identical (CT335: 1.37VDC; VOR2142A8: 1.36VDC), ensuring compatible drive circuits.

Output Capability: The VOR2142A8 exceeds the load parameters of the CT335 with a higher rated voltage (0-400V vs 0-80V) and increased load current (140mA vs 80mA), establishing a backward-compatible superset.

Output Type: Both relays support AC and DC output switching.

Parameter Comparison

Engineering Selection Recommendations

The VOR2142A8 from Vishay Semiconductor Opto Division is a qualified substitute for the obsolete CT335. Both components meet ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for modern electronics manufacturing.

The VOR2142A8 maintains active product status, ensuring ongoing availability and continued manufacturer support, whereas the CT335 is classified as obsolete. This status transition makes the VOR2142A8 the appropriate selection for new designs and legacy system upgrades.

The VOR2142A8 provides enhanced electrical specifications with reduced on-state resistance (27 Ohms vs 30 Ohms) and superior load handling capacity (140mA at 0-400V vs 80mA at 0-80V). For applications limited to the original CT335 specifications (80V maximum, 80mA maximum), the VOR2142A8 operates well within design margins.

The moisture sensitivity level difference (CT335: MSL 2 with 1 Year; VOR2142A8: MSL 1 with Unlimited) indicates improved environmental stability of the substitute component.

Frequently Asked Questions (FAQ)

Q: Can the VOR2142A8 replace the CT335 in existing designs? A: Yes. Both components share identical 8-DIP (0.300", 7.62mm) package geometry, PC pin termination, and circuit configuration (SPST-NO x 2). Input voltage requirements are virtually identical (1.37VDC vs 1.36VDC). Direct board-level substitution is mechanically and electrically compatible.

Q: What are the key differences between CT335 and VOR2142A8? A: The primary differences are product status (CT335 is obsolete; VOR2142A8 is active), electrical performance (VOR2142A8 supports higher load voltage and current), and environmental ratings. The VOR2142A8 represents a superset of the CT335 capabilities.

Q: Are regulatory certifications equivalent? A: Yes. Both components are ROHS3 compliant and REACH unaffected, meeting the same regulatory framework for electronics manufacturing.

Q: Does package and pinout compatibility apply to all PCB designs? A: Physical and electrical compatibility is confirmed. Design review is recommended for applications operating near the original load voltage (80V) or current (80mA) limits to confirm margin adequacy with the substitute component.

Q: What is the availability status of these components? A: The CT335 is obsolete with existing inventory of 2120 units. The VOR2142A8 is active with 2884 units in stock, providing sustained availability for both legacy support and new production.