Q601E4 TRIAC 600V 1A TO-92 Equivalent & Substitute Parts

Part Overview

The Q601E4 is a standard TRIAC thyristor rated for 600V off-state voltage and 1A on-state current in a TO-92 through-hole package. Manufactured by Littelfuse Inc., this component is active and ROHS3 compliant. Equivalent and substitute parts are identified based on matching electrical ratings, package compatibility, and operational parameters that ensure functional interchangeability in circuit applications.

Key Parameters

Parameter	Value
Voltage - Off State	600 V
Current - On State (It (RMS)) (Max)	1 A
Voltage - Gate Trigger (Vgt) (Max)	1.3 V
Current - Gate Trigger (Igt) (Max)	25 mA
Current - Hold (Ih) (Max)	25 mA
Operating Temperature Range	-65°C ~ 125°C (TJ)
Package / Case	TO-226-3, TO-92-3 (TO-226AA)
Mounting Type	Through Hole
Configuration	Single

Substitute Part Grouping Explanation

Substitute parts for the Q601E4 are qualified based on the following criteria:

Electrical Compatibility Requirements:

Voltage - Off State: 600 V (exact match required)
Current - On State (It (RMS)) (Max): 1 A or greater
Voltage - Gate Trigger (Vgt) (Max): 1.3 V or lower
Configuration: Single (exact match required)
Package / Case: TO-226-3, TO-92-3 (TO-226AA) (exact match required)
Mounting Type: Through Hole (exact match required)

Substitution Logic: All identified substitute parts maintain the 600V off-state voltage rating and 1A on-state current capability. Gate trigger voltage remains at or below 1.3V maximum. Package and mounting specifications are identical. Differences in gate trigger current (Igt) and hold current (Ih) specifications reflect variations in TRIAC type classification (Logic - Sensitive Gate vs. Standard), which do not prevent functional substitution when electrical ratings are met.

Parameter Comparison

Parameter	Q601E4 (Littelfuse)	Z00607MA 5BL2 (STMicroelectronics)	Z0103MA 1AA2 (STMicroelectronics)	Z0103MA 2AL2 (STMicroelectronics)	Z0103MA 5AL2 (STMicroelectronics)	Z0107MA 1AA2 (STMicroelectronics)
Voltage - Off State	600 V	600 V	600 V	600 V	600 V	600 V
Current - On State (It (RMS)) (Max)	1 A	800 mA	1 A	1 A	1 A	1 A
Voltage - Gate Trigger (Vgt) (Max)	1.3 V	1.3 V	1.3 V	1.3 V	1.3 V	1.3 V
Current - Gate Trigger (Igt) (Max)	25 mA	5 mA	3 mA	3 mA	3 mA	5 mA
Current - Hold (Ih) (Max)	25 mA	5 mA	7 mA	7 mA	7 mA	10 mA
Operating Temperature Range	-65°C ~ 125°C	-40°C ~ 110°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Package / Case	TO-226-3, TO-92-3	TO-226-3, TO-92-3	TO-226-3, TO-92-3	TO-226-3, TO-92-3	TO-226-3, TO-92-3	TO-226-3, TO-92-3
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Configuration	Single	Single	Single	Single	Single	Single
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

All substitute parts listed maintain active product status and ROHS3 compliance. Selection between substitute options depends on application-specific requirements:

Z00607MA 5BL2: Suitable for applications where on-state current requirement is 800 mA or less. Operating temperature range limited to -40°C ~ 110°C. Available in Cut Tape packaging.

Z0103MA 1AA2, Z0103MA 2AL2, Z0103MA 5AL2: Support full 1A on-state current rating. Operating temperature range extends to -65°C minimum equivalent (-40°C minimum for these parts) through 125°C maximum. Z0103MA 1AA2 available in Bulk packaging; Z0103MA 2AL2 and Z0103MA 5AL2 available in Cut Tape packaging.

Z0107MA 1AA2: Supports full 1A on-state current rating with operating temperature range -40°C ~ 125°C. Available in Bulk packaging.

All substitute parts are ROHS3 compliant and REACH unaffected, matching the regulatory status of the Q601E4.

Frequently Asked Questions (FAQ)

Q: Can Z00607MA 5BL2 replace Q601E4 in all applications?

A: Z00607MA 5BL2 is electrically compatible for applications requiring 800 mA or less on-state current. If the circuit requires the full 1A rating of the Q601E4, this substitute is not appropriate. Additionally, the operating temperature range is limited to -40°C ~ 110°C compared to the Q601E4's -65°C ~ 125°C range.

Q: What is the difference between the Z0103MA variants (1AA2, 2AL2, 5AL2)?

A: All three Z0103MA variants share identical electrical specifications: 600V off-state voltage, 1A on-state current, 1.3V gate trigger voltage, and -40°C ~ 125°C operating temperature range. The differences are in packaging format: Z0103MA 1AA2 is supplied in Bulk; Z0103MA 2AL2 and Z0103MA 5AL2 are supplied in Cut Tape (CT). Selection depends on procurement and assembly requirements.

Q: Are all substitute parts pin-compatible with Q601E4?

A: Yes. All substitute parts use the TO-226-3 / TO-92-3 package with identical through-hole mounting configuration. Pin assignments are compatible for direct replacement.

Q: What does "Logic - Sensitive Gate" mean compared to "Standard" TRIAC type?

A: The Q601E4 is classified as a Standard TRIAC. Substitute parts classified as Logic - Sensitive Gate have lower gate trigger current (Igt) and hold current (Ih) specifications, indicating enhanced gate sensitivity. This does not prevent substitution; it indicates the substitute requires less gate current to trigger. Circuits designed for the Q601E4 will function with these substitutes.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and REACH unaffected, matching the regulatory compliance of the Q601E4.

Q: Which substitute part has the widest operating temperature range?

A: The Q601E4 itself has the widest range at -65°C ~ 125°C. Among substitutes, Z0103MA 1AA2, Z0103MA 2AL2, Z0103MA 5AL2, and Z0107MA 1AA2 all support -40°C ~ 125°C. Z00607MA 5BL2 is limited to -40°C ~ 110°C.

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