16TTS12FP SCR Thyristor Equivalent & Substitute Parts

Part Overview

The 16TTS12FP is a silicon-controlled rectifier (SCR) rated for 1.2 kV off-state voltage with 16 A RMS on-state current capacity in a TO-220AB through-hole package. Manufactured by Vishay General Semiconductor - Diodes Division, this component is classified as obsolete product status. Due to its obsolete designation and limited availability relative to active alternatives, identifying equivalent substitute parts with compatible electrical and mechanical specifications is necessary for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value
Voltage - Off State	1.2 kV
Current - On State (It (RMS)) (Max)	16 A
Voltage - On State (Vtm) (Max)	1.4 V
Voltage - Gate Trigger (Vgt) (Max)	2 V
Current - Gate Trigger (Igt) (Max)	60 mA
Current - Hold (Ih) (Max)	100 mA
Operating Temperature Range	-40°C to 125°C
Package / Case	TO-220-3
Mounting Type	Through Hole
SCR Type	Standard Recovery

Substitute Part Grouping Explanation

Substitution of the 16TTS12FP is determined by the following critical parameters:

Off-state voltage rating: Must equal 1.2 kV to maintain circuit voltage protection margins
On-state current capacity (RMS): Must meet or exceed 16 A to handle design load requirements
Package and mounting type: Must be TO-220-3 through-hole to ensure mechanical and thermal compatibility with existing PCB layouts
SCR type: Must be Standard Recovery to match switching characteristics
Operating temperature range: Must span -40°C to 125°C minimum to support application environment

The CS19-12HO1 manufactured by IXYS meets these substitution criteria with equivalent voltage ratings, compatible package configuration, and matching SCR recovery type. This part maintains functional compatibility while offering improved electrical performance characteristics and active product status.

Parameter Comparison

Parameter	16TTS12FP (Vishay)	CS19-12HO1 (IXYS)
Voltage - Off State	1.2 kV	1.2 kV
Current - On State (It (RMS)) (Max)	16 A	29 A
Voltage - On State (Vtm) (Max)	1.4 V	1.6 V
Voltage - Gate Trigger (Vgt) (Max)	2 V	1.5 V
Current - Gate Trigger (Igt) (Max)	60 mA	28 mA
Current - Hold (Ih) (Max)	100 mA	50 mA
Current - Off State (Max)	500 µA	5 mA
Operating Temperature Range	-40°C to 125°C	-40°C to 125°C
Package / Case	TO-220-3	TO-220-3
Mounting Type	Through Hole	Through Hole
SCR Type	Standard Recovery	Standard Recovery
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant

Engineering Selection Recommendations

The CS19-12HO1 is the qualified substitute for the 16TTS12FP based on the following engineering criteria:

Voltage and Current Compatibility: Both devices share identical 1.2 kV off-state voltage ratings. The CS19-12HO1 provides 29 A RMS on-state current capacity, which exceeds the 16 A requirement of the original design, ensuring adequate current margin without circuit modification.

Package and Thermal Compatibility: Both parts use TO-220-3 through-hole packaging with identical mounting footprints, allowing direct PCB substitution without layout changes or thermal management redesign.

Product Status and Compliance: The CS19-12HO1 carries active product status with ROHS3 compliance certification, providing long-term supply assurance and regulatory alignment. The 16TTS12FP obsolete status creates procurement risk and regulatory exposure for new designs.

Gate Drive Characteristics: The CS19-12HO1 requires lower gate trigger voltage (1.5 V maximum versus 2 V) and gate trigger current (28 mA maximum versus 60 mA), resulting in reduced gate drive circuit complexity and power consumption.

Frequently Asked Questions (FAQ)

Q: Can the CS19-12HO1 directly replace the 16TTS12FP without circuit modification?

A: Yes. Both devices share identical 1.2 kV voltage ratings, TO-220-3 package configuration, and Standard Recovery SCR type. The CS19-12HO1 higher current rating (29 A versus 16 A) provides additional design margin without requiring circuit changes.

Q: What is the significance of the higher on-state current rating in the CS19-12HO1?

A: The 29 A RMS rating in the CS19-12HO1 exceeds the 16 A design requirement, providing thermal and electrical margin. This allows the substitute part to operate at lower junction temperatures under identical load conditions, extending component life and improving reliability.

Q: Are there package or mounting differences between these parts?

A: No. Both the 16TTS12FP and CS19-12HO1 use TO-220-3 through-hole packages with identical lead configurations and PCB footprints. Mechanical and thermal mounting interfaces are fully compatible.

Q: Why does the CS19-12HO1 have lower gate trigger specifications?

A: The CS19-12HO1 requires 1.5 V gate trigger voltage and 28 mA gate trigger current compared to the 16TTS12FP specifications of 2 V and 60 mA respectively. Lower gate drive requirements reduce circuit complexity and power consumption in the gate drive stage.

Q: What is the compliance difference between these parts?

A: The 16TTS12FP is RoHS non-compliant, while the CS19-12HO1 is ROHS3 compliant. For new designs or applications subject to RoHS regulations, the CS19-12HO1 is the required choice.

Q: Is the CS19-12HO1 available in the same packaging format?

A: The 16TTS12FP is supplied in Full-Pak format, while the CS19-12HO1 is supplied in Tube packaging. Both formats contain the same component in TO-220-3 configuration. Tube packaging is standard for active production parts and does not affect electrical or mechanical compatibility.

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