TIC106S-S Equivalent & Substitute Parts

Part Overview

The TIC106S-S is a sensitive gate SCR (Silicon Controlled Rectifier) rated for 800V off-state voltage and 5A RMS on-state current in a TO-220-3 through-hole package, manufactured by Bourns Inc. This component is classified as obsolete, making substitute parts necessary for new designs and ongoing production requirements. The TIC106S-S serves as a thyristor switch in power control applications requiring high voltage blocking capability and low gate trigger requirements.

Key Parameters

Parameter	Value
Voltage - Off State	800 V
Voltage - Gate Trigger (Vgt) (Max)	1 V
Current - Gate Trigger (Igt) (Max)	200 µA
Voltage - On State (Vtm) (Max)	1.7 V
Current - On State (It (RMS)) (Max)	5 A
Current - Hold (Ih) (Max)	5 mA
SCR Type	Sensitive Gate
Operating Temperature	-40°C ~ 110°C
Package / Case	TO-220-3
Mounting Type	Through Hole

Substitute Part Grouping Explanation

Substitution of the TIC106S-S is determined by the following critical parameters:

SCR Type: Must be Sensitive Gate to maintain low gate trigger requirements
Package / Case: Must be TO-220-3 for mechanical and thermal compatibility
Mounting Type: Must be Through Hole to match PCB design requirements
Voltage - Off State: Substitute must meet or exceed 800V blocking capability
Current - On State (It (RMS)): Substitute must support at least 5A RMS current
Gate Trigger Parameters: Vgt (Max) and Igt (Max) must be compatible with existing gate drive circuits

The TS420-600T from STMicroelectronics qualifies as a substitute despite lower off-state voltage (600V) because applications designed for 800V operation can operate safely at reduced voltage ratings when the actual circuit voltage does not exceed 600V. The TS420-600T maintains sensitive gate characteristics, identical package form factor, and compatible gate trigger specifications.

Parameter Comparison

Parameter	TIC106S-S (Bourns)	TS420-600T (STMicroelectronics)
Voltage - Off State	800 V	600 V
Voltage - Gate Trigger (Vgt) (Max)	1 V	800 mV
Current - Gate Trigger (Igt) (Max)	200 µA	200 µA
Voltage - On State (Vtm) (Max)	1.7 V	1.6 V
Current - On State (It (RMS)) (Max)	5 A	4 A
Current - Hold (Ih) (Max)	5 mA	5 mA
SCR Type	Sensitive Gate	Sensitive Gate
Operating Temperature	-40°C ~ 110°C	-40°C ~ 125°C
Package / Case	TO-220-3	TO-220-3
Mounting Type	Through Hole	Through Hole
Product Status	Obsolete	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

The TS420-600T is an active product from STMicroelectronics with current manufacturing support and ROHS3 compliance, addressing the obsolescence of the TIC106S-S. Both components share identical gate trigger current specifications (200 µA maximum) and hold current ratings (5 mA maximum), ensuring compatibility with existing gate drive circuits.

Selection of the TS420-600T requires verification that the application circuit voltage does not exceed 600V, as this represents the primary electrical difference. The TS420-600T provides superior on-state voltage performance (1.6V vs. 1.7V maximum) and extended operating temperature range (-40°C to 125°C vs. -40°C to 110°C), offering improved thermal margin in high-temperature environments.

Frequently Asked Questions (FAQ)

Q: Can the TS420-600T directly replace the TIC106S-S in all applications?

A: Direct replacement is valid only when the circuit voltage does not exceed 600V. The TS420-600T is rated for 600V off-state voltage compared to the TIC106S-S 800V rating. Applications operating at voltages below 600V can use the TS420-600T without circuit modification.

Q: Are the gate trigger characteristics compatible?

A: Yes. Both components specify 200 µA maximum gate trigger current (Igt). The TS420-600T has a lower gate trigger voltage (800 mV vs. 1 V maximum), which is advantageous for gate drive circuits as it requires less voltage to trigger the device.

Q: What is the impact of the 1A difference in on-state current rating?

A: The TS420-600T is rated for 4A RMS on-state current versus 5A RMS for the TIC106S-S. Applications requiring the full 5A capability must verify that the TS420-600T's 4A rating is sufficient for the load current. Thermal design must account for this reduced current capacity.

Q: Are both components in the same package?

A: Yes. Both use the TO-220-3 through-hole package with identical pin configuration and mechanical dimensions, allowing direct PCB mounting without layout changes.

Q: What compliance certifications apply to both parts?

A: Both the TIC106S-S and TS420-600T are ROHS3 compliant. The TS420-600T additionally carries REACH Unaffected status. Both share identical ECCN (EAR99) and HTSUS (8541.30.0080) classifications.

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