Q201E3 Equivalent & Substitute Parts

Part Overview

The Q201E3 is a Logic-Sensitive Gate TRIAC rated for 200 V off-state voltage with 1 A on-state current in a Through Hole TO-92 package, manufactured by Littelfuse Inc. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. Substitute TRIACs in this category maintain the same gate sensitivity characteristics and package form factor while offering higher voltage ratings or active product status for continued availability.

Key Parameters

Parameter	Value
Triac Type	Logic - Sensitive Gate
Voltage - Off State	200 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
Operating Temperature	-65°C ~ 125°C (TJ)
Mounting Type	Through Hole
Package / Case	TO-226-3, TO-92-3 (TO-226AA)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the Q201E3 is determined by the following allowed parameters:

Triac Type: Must be Logic - Sensitive Gate configuration
Current - On State (It (RMS)) (Max): Must be 1 A or greater
Voltage - Gate Trigger (Vgt) (Max): Must be 1.3 V or lower
Current - Gate Trigger (Igt) (Max): Must be 10 mA or lower
Current - Hold (Ih) (Max): Must be 15 mA or lower
Mounting Type: Must be Through Hole
Package / Case: Must be TO-226-3 or TO-92-3 (TO-226AA)

Substitute parts are grouped into two categories:

Upgrade Substitutes (Littelfuse Inc.): Q401E3 and Q601E3 maintain identical gate sensitivity and current specifications while offering higher off-state voltage ratings (400 V and 600 V respectively). Both are active products with ROHS3 compliance.

Manufacturer Recommended Substitute (STMicroelectronics): Z0109MA 1AA2 is a 600 V rated TRIAC with matching gate sensitivity and current specifications. This part represents the manufacturer-recommended cross-reference with active product status and ROHS3 compliance.

Parameter Comparison

Parameter	Q201E3	Q401E3	Q601E3	Z0109MA 1AA2
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.	STMicroelectronics
Triac Type	Logic - Sensitive Gate	Logic - Sensitive Gate	Logic - Sensitive Gate	Logic - Sensitive Gate
Voltage - Off State	200 V	400 V	600 V	600 V
Current - On State (It (RMS)) (Max)	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
Current - Gate Trigger (Igt) (Max)	10 mA	10 mA	10 mA	10 mA
Current - Hold (Ih) (Max)	15 mA	15 mA	15 mA	10 mA
Operating Temperature	-65°C ~ 125°C	-65°C ~ 125°C	-65°C ~ 125°C	-40°C ~ 125°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
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
Product Status	Obsolete	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For direct voltage-rated replacement within Littelfuse product line: Q401E3 (400 V) provides the next voltage tier with identical electrical characteristics and active product status. Q601E3 (600 V) offers maximum voltage headroom with active availability and ROHS3 compliance.

For cross-manufacturer substitution: Z0109MA 1AA2 from STMicroelectronics is the manufacturer-recommended equivalent, rated at 600 V with matching gate sensitivity. This part maintains ROHS3 compliance and active product status. The operating temperature range is -40°C to 125°C, which covers standard industrial applications but does not extend to the lower -65°C limit of the original Q201E3.

All substitute parts maintain Through Hole TO-92-3 package compatibility and are ROHS3 compliant, supporting modern procurement and environmental requirements.

Frequently Asked Questions (FAQ)

Q: Can Q401E3 or Q601E3 be used as direct replacements for Q201E3?

A: Yes. Both Q401E3 and Q601E3 maintain identical gate sensitivity (Vgt 1.3 V max, Igt 10 mA max) and on-state current (1 A) specifications. The higher voltage ratings (400 V and 600 V respectively) are compatible with applications designed for 200 V operation. Both are active products with ROHS3 compliance.

Q: What is the difference between Q601E3 and Z0109MA 1AA2?

A: Both are 600 V Logic-Sensitive Gate TRIACs in TO-92-3 packages with 1 A on-state current and 1.3 V gate trigger voltage. Z0109MA 1AA2 is manufactured by STMicroelectronics and has a maximum hold current of 10 mA compared to Q601E3's 15 mA. Z0109MA 1AA2 operates from -40°C to 125°C, while Q601E3 operates from -65°C to 125°C.

Q: Is the Z0109MA 1AA2 suitable for applications requiring -65°C operation?

A: No. Z0109MA 1AA2 is rated for -40°C to 125°C operation. For applications requiring -65°C minimum temperature, Q401E3 or Q601E3 from Littelfuse are appropriate selections.

Q: Are all substitute parts in the same package?

A: Yes. Q201E3, Q401E3, Q601E3, and Z0109MA 1AA2 are all Through Hole components in TO-226-3 / TO-92-3 (TO-226AA) packages, ensuring mechanical and electrical compatibility on existing PCB layouts.

Q: What compliance certifications apply to these parts?

A: All listed parts are ROHS3 compliant. Z0109MA 1AA2 and Q601E3 carry REACH Unaffected status. All parts are classified under ECCN EAR99 and HTSUS 8541.30.0080.

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