ACT108-600D,126 TRIAC Equivalent & Substitute Parts

Part Overview

The ACT108-600D,126 is a Logic-Sensitive Gate TRIAC manufactured by WeEn Semiconductors, rated for 600V off-state voltage and 800mA on-state current in a TO-92-3 through-hole package. This component is Active status and RoHS Compliant. Equivalent and substitute parts are identified based on matching electrical characteristics (voltage rating, current capacity, gate trigger parameters) and mechanical compatibility (package type, mounting configuration) to ensure functional interchangeability in circuit applications.

Key Parameters

Parameter	ACT108-600D,126
Manufacturer	WeEn Semiconductors
Triac Type	Logic - Sensitive Gate
Voltage - Off State	600 V
Current - On State (It RMS Max)	800 mA
Voltage - Gate Trigger (Vgt Max)	900 mV
Current - Gate Trigger (Igt Max)	5 mA
Current - Hold (Ih Max)	20 mA
Operating Temperature	125°C (TJ)
Package / Case	TO-226-3, TO-92-3 (TO-226AA) Formed Leads
Mounting Type	Through Hole
RoHS Status	RoHS Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the ACT108-600D,126 is determined by the following critical parameters:

Primary Matching Criteria:

Voltage - Off State: 600V (exact match required)
Triac Type: Logic - Sensitive Gate (functional equivalence)
Package / Case: TO-92-3 or TO-226-3 compatible (mechanical compatibility)
Mounting Type: Through Hole (assembly compatibility)

Secondary Compatibility Parameters:

Current - On State (It RMS Max): 800mA minimum
Voltage - Gate Trigger (Vgt Max): 900mV to 1.3V range (acceptable variation)
Current - Gate Trigger (Igt Max): 3mA to 10mA range (acceptable variation)
Current - Hold (Ih Max): 5mA to 20mA range (acceptable variation)

Parts meeting all primary criteria and falling within secondary parameter ranges are classified as direct substitutes. Parts with higher current ratings (1A) are functionally compatible but represent upgraded specifications. Parts with different Triac Type classifications (Standard vs. Logic-Sensitive Gate) are listed for reference but require application-level verification.

Parameter Comparison

Part Number	Manufacturer	Triac Type	Voltage - Off State	Current - On State (It RMS Max)	Voltage - Gate Trigger (Vgt Max)	Current - Gate Trigger (Igt Max)	Current - Hold (Ih Max)	Operating Temperature	Package	RoHS Status
ACT108-600D,126	WeEn Semiconductors	Logic - Sensitive Gate	600 V	800 mA	900 mV	5 mA	20 mA	125°C	TO-92-3	RoHS Compliant
Z00607MA 1BA2	STMicroelectronics	Logic - Sensitive Gate	600 V	800 mA	1.3 V	5 mA	5 mA	-40°C ~ 110°C	TO-92-3	ROHS3 Compliant
Z00607MA 2BL2	STMicroelectronics	Logic - Sensitive Gate	600 V	800 mA	1.3 V	5 mA	5 mA	-40°C ~ 110°C	TO-92	ROHS3 Compliant
Z00607MA 5BL2	STMicroelectronics	Logic - Sensitive Gate	600 V	800 mA	1.3 V	5 mA	5 mA	-40°C ~ 110°C	TO-92-3	ROHS3 Compliant
L0103ME	Littelfuse Inc.	Logic - Sensitive Gate	600 V	1 A	1.3 V	3 mA	7 mA	-40°C ~ 125°C	TO-92-3	ROHS3 Compliant
L0107ME	Littelfuse Inc.	Logic - Sensitive Gate	600 V	1 A	1.3 V	5 mA	10 mA	-40°C ~ 125°C	TO-92-3	ROHS3 Compliant
L0109MERP	Littelfuse Inc.	Logic - Sensitive Gate	600 V	1 A	1.3 V	10 mA	10 mA	-40°C ~ 125°C	TO-92-3	ROHS3 Compliant
L601E3	Littelfuse Inc.	Logic - Sensitive Gate	600 V	1 A	1.3 V	3 mA	5 mA	-65°C ~ 125°C	TO-92-3	ROHS3 Compliant
L601E5	Littelfuse Inc.	Logic - Sensitive Gate	600 V	1 A	1.3 V	5 mA	10 mA	-65°C ~ 125°C	TO-92-3	ROHS3 Compliant
Q601E3	Littelfuse Inc.	Logic - Sensitive Gate	600 V	1 A	1.3 V	10 mA	15 mA	-65°C ~ 125°C	TO-92-3	ROHS3 Compliant
Q601E4	Littelfuse Inc.	Standard	600 V	1 A	1.3 V	25 mA	25 mA	-65°C ~ 125°C	TO-92-3	ROHS3 Compliant

Engineering Selection Recommendations

Direct Substitutes (Matched Current Rating - 800mA):

The STMicroelectronics Z00607MA series (Z00607MA 1BA2, Z00607MA 2BL2, Z00607MA 5BL2) provides electrical equivalence with identical 600V/800mA specifications and Logic-Sensitive Gate classification. All variants are ROHS3 Compliant and Active status. Z00607MA 1BA2 and Z00607MA 5BL2 maintain TO-92-3 package compatibility. Operating temperature range (-40°C to 110°C) is narrower than the ACT108-600D,126 (125°C max); verify application requirements before selection.

Upgraded Substitutes (Higher Current Rating - 1A):

Littelfuse Logic-Sensitive Gate TRIACs (L0103ME, L0107ME, L0109MERP, L601E3, L601E5, Q601E3) offer 1A on-state current, exceeding the 800mA specification. All maintain 600V voltage rating, TO-92-3 package compatibility, and ROHS3 Compliance. These parts are suitable for applications where higher current capacity provides design margin. Operating temperature ranges extend to -65°C (L601E3, L601E5, Q601E3) or -40°C (L0103ME, L0107ME, L0109MERP), accommodating broader environmental conditions.

Reference Part (Different Classification):

Q601E4 (Littelfuse, Standard TRIAC) shares 600V/1A electrical ratings and TO-92-3 package but differs in Triac Type classification (Standard vs. Logic-Sensitive Gate). Gate trigger current (Igt Max 25mA) and hold current (Ih Max 25mA) are significantly higher. This part is listed for reference; application-level compatibility verification is required before substitution.

Compliance & Availability:

All substitute parts maintain RoHS compliance (RoHS Compliant or ROHS3 Compliant). Inventory availability ranges from 788 to 9157 units across substitute options, supporting production requirements.

Frequently Asked Questions (FAQ)

Q: Can I substitute the ACT108-600D,126 with a 1A-rated TRIAC?

A: Yes. Littelfuse L0103ME, L0107ME, L0109MERP, L601E3, L601E5, and Q601E3 all maintain 600V voltage rating and TO-92-3 package compatibility. The 1A current rating exceeds the 800mA specification, providing higher capacity. Verify circuit design does not depend on the lower current threshold of the original part.

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

A: Logic-Sensitive Gate TRIACs (ACT108-600D,126, L0103ME, L0107ME, L601E3, L601E5, Q601E3) feature lower gate trigger current (Igt) and hold current (Ih) specifications, enabling operation with lower-power gate drive circuits. Standard TRIACs (Q601E4) require higher gate drive levels. Substitution between these types requires circuit-level verification.

Q: Are Z00607MA variants pin-compatible with ACT108-600D,126?

A: Yes. Z00607MA 1BA2, Z00607MA 2BL2, and Z00607MA 5BL2 are all through-hole TO-92 or TO-92-3 packages with identical pin configurations. Mechanical fit and electrical connection are compatible. Verify PCB layout accommodates the specific package variant selected.

Q: What is the impact of different operating temperature ranges?

A: STMicroelectronics Z00607MA series operates to 110°C maximum junction temperature, compared to 125°C for ACT108-600D,126. Littelfuse parts extend to 125°C (L0103ME, L0107ME, L0109MERP) or 125°C with lower ambient start (-65°C for L601E3, L601E5, Q601E3). Select based on application thermal environment and design margin requirements.

Q: Is RoHS compliance maintained across all substitutes?

A: Yes. ACT108-600D,126 is RoHS Compliant. All listed substitutes are ROHS3 Compliant or RoHS Compliant, meeting regulatory requirements for restricted substance elimination.

Q: Can I use Q601E4 as a direct substitute?

A: Q601E4 shares 600V/1A electrical ratings and TO-92-3 package but is classified as Standard TRIAC rather than Logic-Sensitive Gate. Gate trigger and hold current specifications are significantly higher (25mA vs. 3-10mA range). Substitution requires verification that gate drive circuitry can supply the higher current levels and that circuit timing is not affected by different switching characteristics.

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