CTB16-1200SWPT Equivalent & Substitute Parts

Part Overview

The CTB16-1200SWPT is a Logic - Sensitive Gate TRIAC manufactured by Sensata-Crydom, rated for 1.2 kV off-state voltage and 16 A on-state current in a Through Hole TO-220AB package. This component is classified as Obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and new design implementations. The sensitive gate configuration and 16 A current rating define its primary application scope.

Substiute Parts

CTB16-1200SWPT

Sensata-CrydomIn Stock: 1005CTB16-1200SWPT Datasheet

Current PartRFQ

TXDV1212RG

STMicroelectronicsIn Stock: 10328TXDV1212RG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CTB16-1200SWPT is determined by the following critical parameters:

• Voltage - Off State: Must equal 1.2 kV
• Package / Case: Must be TO-220-3 (Through Hole TO-220AB)
• Configuration: Must be Single
• Operating Temperature Range: Must support -40°C ~ 125°C (TJ)

The TXDV1212RG from STMicroelectronics meets these core requirements. However, the following parameter differences exist and must be evaluated for application compatibility:

• Current - On State (It (RMS)) (Max): 12 A (versus 16 A in original)
• Triac Type: Standard (versus Logic - Sensitive Gate in original)
• Voltage - Gate Trigger (Vgt) (Max): 1.5 V (versus 1.3 V in original)
• Current - Gate Trigger (Igt) (Max): 100 mA (versus 10 mA in original)
• Current - Hold (Ih) (Max): 100 mA (versus 15 mA in original)

Parameter Comparison

Engineering Selection Recommendations

The TXDV1212RG is available as an Active product from STMicroelectronics with ROHS3 compliance, providing supply chain continuity for the obsolete CTB16-1200SWPT. Both components share identical off-state voltage, operating temperature range, and TO-220AB package configuration.

The TXDV1212RG operates as a Standard TRIAC rather than a Logic - Sensitive Gate type. This classification difference results in higher gate trigger current requirements (100 mA versus 10 mA) and higher hold current (100 mA versus 15 mA). The on-state current rating is reduced from 16 A to 12 A, and non-repetitive surge current is reduced from 160/168 A to 120/125 A.

Selection of the TXDV1212RG is appropriate where application current requirements do not exceed 12 A and gate drive circuitry can supply the higher trigger current specification. Applications requiring the sensitive gate characteristics or 16 A current capacity of the original part require evaluation of alternative sources.

Frequently Asked Questions (FAQ)

Q: Can the TXDV1212RG directly replace the CTB16-1200SWPT in existing designs?

A: Direct replacement is possible only if the application current requirement does not exceed 12 A and the gate drive circuit can supply 100 mA trigger current. The sensitive gate characteristic of the original part is not preserved in the substitute.

Q: What is the significance of the Triac Type difference (Logic - Sensitive Gate versus Standard)?

A: Logic - Sensitive Gate TRIACs require lower gate trigger current (10 mA) and hold current (15 mA), enabling operation with minimal gate drive circuitry. Standard TRIACs require higher gate trigger current (100 mA) and hold current (100 mA), necessitating more robust gate drive design.

Q: Are both components electrically compatible in the same PCB footprint?

A: Both components use the TO-220-3 package and Through Hole mounting configuration, providing mechanical and footprint compatibility. Electrical compatibility depends on application current and gate drive requirements.

Q: What compliance certifications apply to the TXDV1212RG?

A: The TXDV1212RG is ROHS3 Compliant and REACH Unaffected. Both components share REACH Unaffected status and identical ECCN and HTSUS classifications.

Q: How do the surge current ratings compare?

A: The CTB16-1200SWPT is rated for 160 A (50 Hz) and 168 A (60 Hz) non-repetitive surge current. The TXDV1212RG is rated for 120 A (50 Hz) and 125 A (60 Hz). Applications with surge current requirements exceeding 120/125 A require the original part specification.