Q601E3 Equivalent & Substitute Parts

Part Overview

The Q601E3 is a Logic - Sensitive Gate TRIAC rated for 600 V off-state voltage and 1 A on-state current, manufactured by Littelfuse Inc. in a Through Hole TO-92 package. This component is Active in product status and ROHS3 compliant. Substitute parts are necessary when the original part becomes unavailable, when alternative packaging formats are required, or when sourcing from different manufacturers is preferred while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Manufacturer Part Number	Q601E3
Manufacturer	Littelfuse Inc.
Category	Thyristors
Triac Type	Logic - Sensitive Gate
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)	10 mA
Current - Hold (Ih) (Max)	15 mA
Configuration	Single
Operating Temperature	-65°C ~ 125°C (TJ)
Mounting Type	Through Hole
Package / Case	TO-226-3, TO-92-3 (TO-226AA)
RoHS Status	ROHS3 Compliant
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitution eligibility for the Q601E3 is determined by the following critical parameters:

Voltage - Off State: Must equal 600 V
Triac Type: Must be Logic - Sensitive Gate
Configuration: Must be Single
Mounting Type: Must be Through Hole
Package / Case: Must be TO-226-3 or TO-92-3 (TO-226AA)
RoHS Status: Must be ROHS3 Compliant
REACH Status: Must be REACH Unaffected

Substitute parts are grouped into two categories based on on-state current rating:

Group 1 (0.8 A Rating): Z00607MA series from STMicroelectronics. These parts operate at reduced on-state current (800 mA maximum) compared to the Q601E3 (1 A maximum). This group is suitable for applications where the lower current rating is acceptable.

Group 2 (1 A Rating): Z0103MA and Z0107MA series from STMicroelectronics. These parts maintain the 1 A on-state current rating of the Q601E3, providing direct electrical equivalence for current-sensitive applications.

All substitute parts maintain the 600 V off-state voltage, Logic - Sensitive Gate configuration, and Through Hole mounting compatibility required for direct substitution.

Parameter Comparison

Parameter	Q601E3 (Littelfuse)	Z00607MA 1BA2 (STMicro)	Z00607MA 2BL2 (STMicro)	Z00607MA 5BL2 (STMicro)	Z0103MA 1AA2 (STMicro)	Z0103MA 2AL2 (STMicro)	Z0103MA 5AL2 (STMicro)	Z0107MA 1AA2 (STMicro)	Z0107MA 5AL2 (STMicro)
Voltage - Off State	600 V	600 V	600 V	600 V	600 V	600 V	600 V	600 V	600 V
Current - On State (It (RMS)) (Max)	1 A	800 mA	800 mA	800 mA	1 A	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	1.3 V	1.3 V	1.3 V
Current - Gate Trigger (Igt) (Max)	10 mA	5 mA	5 mA	5 mA	3 mA	3 mA	3 mA	5 mA	5 mA
Current - Hold (Ih) (Max)	15 mA	5 mA	5 mA	5 mA	7 mA	7 mA	7 mA	10 mA	10 mA
Triac Type	Logic - Sensitive Gate	Logic - Sensitive Gate	Logic - Sensitive Gate	Logic - Sensitive Gate	Logic - Sensitive Gate	Logic - Sensitive Gate	Logic - Sensitive Gate	Logic - Sensitive Gate	Logic - Sensitive Gate
Configuration	Single	Single	Single	Single	Single	Single	Single	Single	Single
Operating Temperature	-65°C ~ 125°C	-40°C ~ 110°C	-40°C ~ 110°C	-40°C ~ 110°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	TO-92-3	TO-92-3	TO-92	TO-92-3	TO-92-3	TO-92-3	TO-92-3	TO-92-3	TO-92-3
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	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	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

All listed substitute parts maintain Active product status and ROHS3 compliance, meeting regulatory requirements equivalent to the Q601E3.

For applications requiring full electrical equivalence with the original Q601E3 specifications, select from the Z0103MA or Z0107MA series, which maintain the 1 A on-state current rating. Z0103MA variants offer the lowest gate trigger current (3 mA maximum), while Z0107MA variants provide intermediate gate trigger current (5 mA maximum).

The Z00607MA series operates at 800 mA on-state current and is suitable only for applications where this reduced current rating is acceptable. This series offers the lowest gate trigger current among all substitutes (5 mA maximum).

Operating temperature range differs between manufacturers. The Q601E3 operates from -65°C to 125°C, while STMicroelectronics Z00607MA series operates from -40°C to 110°C. The Z0103MA and Z0107MA series operate from -40°C to 125°C, matching the upper temperature limit of the Q601E3.

Packaging format variations exist within substitute series. Z00607MA 2BL2 uses TO-92 package, while other variants use TO-92-3. Z0103MA 2AL2 and Z0107MA 5AL2 include formed leads specification. Verify PCB footprint compatibility before selection.

Frequently Asked Questions (FAQ)

Q: Can Z00607MA series parts directly replace Q601E3 in all applications?

A: Z00607MA series parts are electrically compatible for voltage and gate trigger specifications but operate at 800 mA on-state current versus the Q601E3's 1 A rating. Substitution is valid only if the application current requirement does not exceed 800 mA. Operating temperature range is also reduced (-40°C to 110°C versus -65°C to 125°C).

Q: What is the difference between Z0103MA and Z0107MA series?

A: Both series maintain 1 A on-state current and 600 V off-state voltage. Z0103MA offers lower gate trigger current (3 mA maximum) and hold current (7 mA maximum). Z0107MA offers higher gate trigger current (5 mA maximum) and hold current (10 mA maximum). Selection depends on gate drive circuit requirements.

Q: Are packaging differences between TO-92 and TO-92-3 significant for substitution?

A: TO-92 and TO-92-3 are both Through Hole packages with identical pin configurations and footprints. The primary difference is lead forming specification. Both are mechanically compatible with standard TO-92 PCB layouts. Z00607MA 2BL2 uses TO-92 package while other variants use TO-92-3; both are acceptable substitutes.

Q: Do all substitute parts meet the same compliance standards as Q601E3?

A: All listed substitute parts are ROHS3 compliant and REACH unaffected, matching the Q601E3 compliance profile. All parts are Active in product status.

Q: Which substitute part offers the closest electrical match to Q601E3?

A: Z0103MA 1AA2 and Z0103MA 5AL2 provide the closest electrical match, maintaining 1 A on-state current, 600 V off-state voltage, and -40°C to 125°C operating temperature range. These parts differ primarily in packaging format (Bulk versus Cut Tape) and gate trigger current specification (3 mA versus 10 mA).

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