Equivalent & Substitute Parts for CS134 Solid State Relay

Part Overview

The CS134 is a solid state relay (SSR) manufactured by Coto Technology, classified as a SPST-NO (Single Pole Single Throw - Normally Open) device in the COTOMOS™ series. This component is designed for switching applications with a maximum load current of 200 mA across a voltage range of 0 V to 200 V, supporting both AC and DC output types. The device features surface mount technology with a 6-SMD gull wing termination package.

The CS134 is currently listed as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for systems utilizing this component.

Substiute Parts

CS134

Coto TechnologyIn Stock: 2362CS134 Datasheet

Current PartRFQ

VOR1121B6T

Vishay Semiconductor Opto DivisionIn Stock: 13008VOR1121B6T Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CS134 is determined by strict alignment of electrical and mechanical parameters. The primary substitute identified is the VOR1121B6T manufactured by Vishay Semiconductor Opto Division.

Substitution criteria are based on the following parameters:

• Circuit Configuration: Both devices must be SPST-NO (1 Form A) to maintain identical switching functionality
• Load Current Rating: Both devices rated at 200 mA maximum
• Output Type: Both support AC and DC output switching
• Input Voltage: Both operate at approximately 1.36–1.37 VDC
• Mounting and Package: Both use surface mount technology with 6-SMD gull wing termination in 0.300" (7.62mm) package
• Compliance: Both are ROHS3 compliant and carry EAR99 ECCN classification

The VOR1121B6T qualifies as a direct substitute based on these core electrical and mechanical parameters. Minor differences in on-state resistance and load voltage range are noted in the parameter comparison table below.

Parameter Comparison

Engineering Selection Recommendations

The VOR1121B6T is the identified substitute for the obsolete CS134. Selection of this substitute is supported by the following engineering factors:

Product Status and Availability: The CS134 is obsolete with no ongoing manufacturing. The VOR1121B6T is an active product with confirmed inventory of 12,932 pieces, ensuring supply chain continuity.

Electrical Compatibility: Both devices share identical circuit configuration (SPST-NO), load current rating (200 mA), input voltage specification (1.36–1.37 VDC), and output type support (AC, DC). The VOR1121B6T provides an extended load voltage range (0 V ~ 250 V versus 0 V ~ 200 V), which is compatible with applications designed for the CS134.

Mechanical and Package Compatibility: Both devices use identical surface mount packaging (6-SMD, 0.300" / 7.62mm) with gull wing termination, enabling direct PCB footprint compatibility without layout modifications.

Regulatory Compliance: Both devices are ROHS3 compliant and carry EAR99 ECCN classification, maintaining compliance with applicable regulatory requirements.

Moisture Sensitivity: The VOR1121B6T features MSL 1 (Unlimited) compared to the CS134's MSL 2 (1 Year), providing improved handling and storage characteristics.

The on-state resistance difference (8 Ohms maximum for CS134 versus 15 Ohms maximum for VOR1121B6T) should be evaluated within the context of specific application requirements, particularly for applications sensitive to voltage drop across the relay contact resistance.

Frequently Asked Questions (FAQ)

Q: Can the VOR1121B6T be used as a direct replacement for the CS134 in existing designs?

A: Yes. The VOR1121B6T is mechanically and electrically compatible with the CS134. Both devices share identical circuit configuration, load current rating, input voltage, and surface mount package specifications. Direct PCB substitution is possible without layout modifications.

Q: What is the significance of the load voltage range difference (200 V versus 250 V)?

A: The VOR1121B6T supports a higher maximum load voltage (250 V) compared to the CS134 (200 V). This extended range provides additional design margin and is fully compatible with applications designed for the CS134's 200 V maximum specification.

Q: How does the on-state resistance difference affect circuit performance?

A: The VOR1121B6T has a maximum on-state resistance of 15 Ohms compared to the CS134's 8 Ohms. This difference results in increased voltage drop across the relay contact during conduction. Applications with strict voltage drop requirements should evaluate this parameter against specific load and circuit conditions.

Q: Are there packaging format differences between these devices?

A: Yes. The CS134 is supplied in Tube packaging, while the VOR1121B6T is supplied in Tape & Reel (TR) format. Both formats are standard for surface mount components. Tape & Reel packaging is typical for automated assembly processes.

Q: Do both devices meet the same regulatory compliance standards?

A: Yes. Both the CS134 and VOR1121B6T are ROHS3 compliant and carry EAR99 ECCN classification. The VOR1121B6T maintains equivalent regulatory status for applications requiring these certifications.

Q: What is the moisture sensitivity level difference, and does it matter?

A: The CS134 has MSL 2 (1 Year), while the VOR1121B6T has MSL 1 (Unlimited). MSL 1 indicates superior moisture resistance and unlimited shelf life under controlled storage conditions. The VOR1121B6T provides improved handling flexibility and reduced risk of moisture-related failures during storage and assembly.

Q: Is the input voltage specification identical between the two devices?

A: The input voltages are essentially identical: CS134 at 1.37 VDC and VOR1121B6T at 1.36 VDC. This negligible difference does not affect circuit compatibility or trigger threshold performance.