CS139 Equivalent & Substitute Parts

Part Overview

The CS139 is a Surface Mount Solid State Relay (SSR) with SPST-NO (1 Form A) configuration, rated for 50 mA load current at 0–1000 V output voltage. This component operates from a 1.17 VDC input and features Gull Wing termination in a 6-SMD package format. The CS139 is classified as Obsolete, necessitating identification of functionally compatible alternatives from the active product portfolio.

Substiute Parts

CS139

Coto TechnologyIn Stock: 895CS139 Datasheet

Current PartRFQ

CS140

Coto TechnologyIn Stock: 1822CS140 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The CS140 qualifies as a direct substitute based on the following alignment criteria:

Matched Parameters:

• Manufacturer: Both Coto Technology COTOMOS™ series components
• Circuit Configuration: Identical SPST-NO (1 Form A) topology
• Mounting Type: Surface Mount with matching footprint
• Package / Case: 6-SMD (0.300", 7.62mm) format
• Termination Style: Gull Wing
• Input Voltage: 1.17 VDC
• Output Type: AC, DC capable
• Compliance: RoHS3 Compliant and REACH Unaffected

Substitution Feasibility: The CS140 demonstrates functional compatibility with the CS139 across electrical and mechanical interfaces. The load voltage rating increases to 1500 V (versus 1000 V), providing expanded operational envelope. Load current specification (45 mA versus 50 mA) remains within typical application margins for SSR relay selection. The CS140 is Active in product status with established supply chain availability.

Parameter Comparison

Engineering Selection Recommendations

The CS140 is the direct substitute for the obsolete CS139 within the Coto Technology COTOMOS™ portfolio. Both devices maintain identical input voltage specification (1.17 VDC), circuit topology (SPST-NO), and surface mount 6-SMD package format, ensuring mechanical and electrical compatibility in existing PCB layouts.

The CS140 offers enhanced specification margins: load voltage rating extends to 1500 V (versus 1000 V original), and RoHS3 compliance supersedes the earlier RoHS standard. The marginal reduction in maximum load current (45 mA versus 50 mA) and increase in on-state resistance (200 Ohms versus 150 Ohms) must be evaluated against specific application load requirements.

The CS140 maintains active production status with established inventory availability through Coto Technology distribution channels, providing supply chain continuity for legacy CS139 applications.

Frequently Asked Questions (FAQ)

Q: Can the CS140 directly replace the CS139 in existing designs? A: The CS140 replaces the CS139 mechanically and electrically. Both devices feature identical input voltage (1.17 VDC), circuit configuration (SPST-NO 1 Form A), and 6-SMD package footprint. Application feasibility depends on load current and voltage requirements. If the load current requirement exceeds 45 mA or load voltage exceeds 1500 V, design review is necessary.

Q: What are the key parameter differences between CS139 and CS140? A: The CS140 features higher maximum load voltage (1500 V versus 1000 V), lower maximum load current (45 mA versus 50 mA), and higher on-state resistance (200 Ohms versus 150 Ohms). Input voltage and circuit topology remain unchanged.

Q: Does the CS140 fit the same PCB footprint as the CS139? A: Yes. Both devices use 6-SMD (0.300", 7.62mm) package with Gull Wing termination, ensuring mechanical compatibility with existing surface mount layouts.

Q: What compliance standards apply to the CS140? A: The CS140 is RoHS3 Compliant and REACH Unaffected, meeting current regulatory requirements for component selection in restricted substance compliance applications.

Q: Is the CS140 actively manufactured? A: The CS140 maintains Active product status with established manufacturing continuity and distribution availability, unlike the Obsolete CS139.

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