CTB08-1200SWPT Equivalent & Substitute Parts

Part Overview

The CTB08-1200SWPT is a Logic - Sensitive Gate TRIAC manufactured by Sensata-Crydom, rated for 1.2 kV off-state voltage and 8 A on-state current in a Through Hole TO-220AB package. This component is classified as Obsolete, necessitating identification of functionally equivalent alternatives for new designs and production continuity. Substitute parts must maintain compatibility with the electrical specifications and mechanical form factor of the original component.

Substiute Parts

CTB08-1200SWPT

Sensata-CrydomIn Stock: 964CTB08-1200SWPT Datasheet

Current PartRFQ

TXDV1212RG

STMicroelectronicsIn Stock: 10328TXDV1212RG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CTB08-1200SWPT is determined by the following critical parameters:

• Voltage Rating (Off State): Must equal or exceed 1.2 kV to maintain blocking capability
• Current Rating (On State): Must equal or exceed 8 A to handle the design load
• Package / Case: Must be TO-220-3 to ensure mechanical and thermal compatibility
• Mounting Type: Must be Through Hole to match PCB assembly requirements
• Operating Temperature Range: Must encompass -40°C ~ 125°C to maintain performance across the operating envelope

The TXDV1212RG from STMicroelectronics meets these substitution criteria with equivalent voltage and temperature ratings, higher current capacity (12 A), and identical package configuration.

Parameter Comparison

Engineering Selection Recommendations

The TXDV1212RG is the qualified substitute for the CTB08-1200SWPT based on the following factors:

• Product Status: The TXDV1212RG maintains Active status with confirmed manufacturing availability (10,300 pcs in stock), ensuring long-term supply continuity compared to the Obsolete CTB08-1200SWPT.
• Compliance: The TXDV1212RG is RoHS3 Compliant and carries REACH Unaffected status, meeting current regulatory requirements for electronic components.
• Electrical Compatibility: The substitute maintains identical off-state voltage (1.2 kV) and operating temperature range (-40°C ~ 125°C), with on-state current capacity (12 A) exceeding the original specification (8 A).
• Mechanical Compatibility: Both components utilize the TO-220-3 package with Through Hole mounting, ensuring direct PCB compatibility without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the TXDV1212RG directly replace the CTB08-1200SWPT without circuit modifications?

A: Yes. The TXDV1212RG maintains equivalent voltage ratings, operating temperature range, and package configuration. The higher current rating (12 A vs. 8 A) provides additional design margin without requiring circuit changes.

Q: What is the difference between Logic - Sensitive Gate and Standard TRIAC types?

A: The original CTB08-1200SWPT is classified as Logic - Sensitive Gate, while the TXDV1212RG is Standard type. Both are functionally compatible for switching applications. The Standard type may require slightly higher gate trigger current (100 mA vs. 10 mA), which is accommodated by standard gate drive circuits.

Q: Are there thermal considerations when substituting these components?

A: Both components share identical operating temperature range (-40°C ~ 125°C junction temperature) and TO-220-3 package, which provides equivalent thermal characteristics. PCB layout and heatsinking requirements remain unchanged.

Q: What certifications apply to the TXDV1212RG?

A: The TXDV1212RG is RoHS3 Compliant and REACH Unaffected. Both components carry EAR99 ECCN classification and 8541.30.0080 HTSUS code.

Q: Is the TO-220AB supplier package designation interchangeable with TO-220-3?

A: Yes. TO-220AB is the supplier-specific designation for the standard TO-220-3 package. Both refer to the same three-lead Through Hole package configuration used in this application.