TIC225M-S TRIAC Equivalent & Substitute Parts

Part Overview

The TIC225M-S is a Logic - Sensitive Gate TRIAC manufactured by Bourns Inc., rated for 600 V off-state voltage and 8 A on-state current in a TO-220-3 through-hole package. This component is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. The sensitive gate configuration enables reliable triggering at low gate currents, suitable for applications requiring precise gate control in AC switching circuits.

Key Parameters

Parameter	Value
Voltage - Off State	600 V
Current - On State (It (RMS)) (Max)	8 A
Voltage - Gate Trigger (Vgt) (Max)	2 V
Current - Gate Trigger (Igt) (Max)	5 mA
Current - Hold (Ih) (Max)	20 mA
Current - Non Rep. Surge 50, 60Hz (Itsm)	70 A @ 50 Hz
Operating Temperature Range	-40°C ~ 110°C (TC)
Mounting Type	Through Hole
Package / Case	TO-220-3
Triac Type	Logic - Sensitive Gate
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the TIC225M-S is determined by the following critical parameters:

Voltage Rating: 600 V off-state voltage (non-negotiable for circuit compatibility)
Current Rating: 8 A on-state current (defines load-handling capability)
Gate Sensitivity: Vgt ≤ 2 V and Igt ≤ 5 mA (ensures reliable triggering with existing gate drive circuits)
Package: TO-220-3 through-hole configuration (maintains mechanical and thermal interface compatibility)
Triac Type: Logic - Sensitive Gate (functional equivalence for gate-triggered applications)

Substitute parts are grouped into two categories:

Direct Equivalents (Logic - Sensitive Gate, 600 V, 8 A): Parts meeting all critical parameters with identical or superior gate sensitivity specifications.

Functional Alternatives (Standard or higher current ratings, 600 V): Parts with relaxed gate sensitivity requirements or higher current ratings that operate within the same voltage class and package, suitable when gate drive capability is not a limiting factor.

Parameter Comparison

Part Number	Manufacturer	Triac Type	Voltage - Off State	Current - On State (Max)	Vgt (Max)	Igt (Max)	Ih (Max)	Operating Temp Range	Product Status
TIC225M-S	Bourns Inc.	Logic - Sensitive Gate	600 V	8 A	2 V	5 mA	20 mA	-40°C ~ 110°C	Obsolete
MAC8SMG	Littelfuse Inc.	Logic - Sensitive Gate	600 V	8 A	1.5 V	5 mA	10 mA	-40°C ~ 125°C	Active
BTB08-600SWRG	STMicroelectronics	Logic - Sensitive Gate	600 V	8 A	1.3 V	10 mA	15 mA	-40°C ~ 125°C	Active
T810H-6T	STMicroelectronics	Logic - Sensitive Gate	600 V	8 A	1 V	10 mA	25 mA	-40°C ~ 150°C	Active
BTB08-600CRG	STMicroelectronics	Standard	600 V	8 A	1.3 V	25 mA	25 mA	-40°C ~ 125°C	Active
BTB12-600CRG	STMicroelectronics	Standard	600 V	12 A	1.3 V	25 mA	25 mA	-40°C ~ 125°C	Active
T610H-6T	STMicroelectronics	Logic - Sensitive Gate	600 V	6 A	1 V	10 mA	25 mA	-40°C ~ 150°C	Active
T410H-6T	STMicroelectronics	Logic - Sensitive Gate	600 V	4 A	1 V	10 mA	25 mA	-40°C ~ 150°C	Active
T1010H-6T	STMicroelectronics	Logic - Sensitive Gate	600 V	10 A	1 V	10 mA	25 mA	-40°C ~ 150°C	Active
BTB06-600CRG	STMicroelectronics	Standard	600 V	6 A	1.3 V	25 mA	25 mA	-40°C ~ 125°C	Active
BTB16-600CRG	STMicroelectronics	Standard	600 V	16 A	1.3 V	25 mA	25 mA	-40°C ~ 125°C	Active

Engineering Selection Recommendations

Primary Recommendation: MAC8SMG (Littelfuse Inc.)

The MAC8SMG is the preferred direct equivalent. It maintains Logic - Sensitive Gate functionality with 600 V / 8 A ratings, lower gate trigger voltage (1.5 V vs. 2 V), and identical gate trigger current (5 mA). The extended operating temperature range (-40°C ~ 125°C) provides improved thermal margin. Active product status ensures long-term availability and supply chain stability. ROHS3 compliance and REACH unaffected status confirm regulatory alignment.

Secondary Recommendation: BTB08-600SWRG (STMicroelectronics)

The BTB08-600SWRG offers Logic - Sensitive Gate operation at 600 V / 8 A with superior gate sensitivity (Vgt = 1.3 V, Igt = 10 mA). Extended temperature range (-40°C ~ 125°C) and active product status support production continuity. Higher gate trigger current (10 mA vs. 5 mA) requires verification that existing gate drive circuits can supply this current without modification.

Tertiary Recommendation: T810H-6T (STMicroelectronics)

The T810H-6T provides Logic - Sensitive Gate operation at 600 V / 8 A with the lowest gate trigger voltage (1 V) and extended temperature range to 150°C. Gate trigger current of 10 mA requires gate drive circuit compatibility assessment. Active status and ROHS3 compliance ensure regulatory compliance.

Alternative for Current Derating: BTB12-600CRG (STMicroelectronics)

For applications where 8 A current capacity is not fully utilized, the BTB12-600CRG provides 12 A on-state current at 600 V with Standard TRIAC characteristics. Higher gate trigger current (25 mA) and voltage (1.3 V) require gate drive circuit redesign. Use only when gate drive capability is not a constraint and higher current margin is beneficial.

Current-Limited Alternatives: T610H-6T, T410H-6T

The T610H-6T (6 A) and T410H-6T (4 A) are Logic - Sensitive Gate devices suitable only for applications with reduced current requirements. These parts are not recommended as direct replacements for 8 A load applications.

Frequently Asked Questions (FAQ)

Q: Can MAC8SMG directly replace TIC225M-S without circuit modification?

A: Yes. MAC8SMG matches the critical parameters: 600 V voltage rating, 8 A current rating, Logic - Sensitive Gate type, and TO-220-3 package. Lower gate trigger voltage (1.5 V vs. 2 V) and identical gate trigger current (5 mA) ensure compatibility with existing gate drive circuits. No modifications are required.

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

A: Logic - Sensitive Gate TRIACs require lower gate trigger voltage and current for reliable switching, making them suitable for microcontroller and logic-level gate drive circuits. Standard TRIACs require higher gate trigger currents (typically 25 mA) and are designed for higher-power gate drive sources. Substituting a Standard TRIAC for a Logic - Sensitive Gate device may require gate drive circuit redesign.

Q: Why is the TIC225M-S obsolete, and what is the impact?

A: Obsolete status indicates the manufacturer has discontinued production. This creates supply risk for new designs and ongoing production. Active alternatives such as MAC8SMG and BTB08-600SWRG ensure long-term availability and support for new and existing applications.

Q: Can I use BTB12-600CRG (12 A) instead of TIC225M-S (8 A)?

A: BTB12-600CRG is electrically compatible at 600 V and operates in the same TO-220-3 package. However, it is a Standard TRIAC with higher gate trigger requirements (25 mA vs. 5 mA), requiring gate drive circuit verification. Use only if gate drive capability is confirmed and higher current capacity is beneficial for the application.

Q: What is the impact of extended operating temperature range on substitution?

A: MAC8SMG, BTB08-600SWRG, and T810H-6T extend the operating range to -40°C ~ 125°C or -40°C ~ 150°C, compared to TIC225M-S at -40°C ~ 110°C. This provides improved thermal margin and reliability in high-temperature environments. No negative impact occurs when substituting a part with an extended temperature range.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant, matching the regulatory status of the TIC225M-S. This ensures compliance with environmental and hazardous substance restrictions in target markets.

Q: What package considerations apply to these substitutes?

A: All substitute parts use the TO-220-3 through-hole package, maintaining mechanical and thermal interface compatibility with TIC225M-S. No PCB layout or thermal management modifications are required for package compatibility.

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