TCR22-8 Equivalent & Substitute Parts

Part Overview

The TCR22-8 is a sensitive gate silicon controlled rectifier (SCR) manufactured by Littelfuse Inc., rated for 600 V off-state voltage and 1.5 A RMS on-state current in a TO-92 through-hole package. This component is classified as Active product status with full RoHS3 compliance. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, supply chain considerations, or design flexibility needs.

Key Parameters

Parameter	TCR22-8 Value
Voltage - Off State	600 V
Voltage - Gate Trigger (Vgt) (Max)	800 mV
Current - Gate Trigger (Igt) (Max)	200 µA
Voltage - On State (Vtm) (Max)	1.5 V
Current - On State (It (RMS)) (Max)	1.5 A
Current - Hold (Ih) (Max)	5 mA
Operating Temperature Range	-40°C to 110°C
Package / Case	TO-226-3, TO-92-3 (TO-226AA)
SCR Type	Sensitive Gate
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the TCR22-8 is determined by the following criteria:

Primary Electrical Parameters:

Off-state voltage rating of 600 V or higher
Gate trigger voltage (Vgt) maximum of 800 mV
Gate trigger current (Igt) maximum of 200 µA or lower
Sensitive gate SCR type classification
Operating temperature range that encompasses or exceeds -40°C to 110°C

Mechanical Parameters:

Through-hole mounting type
TO-92-3 package configuration
Compatible lead formation (standard or formed leads)

Compliance Requirements:

RoHS3 compliance
Active product status

Substitute parts are grouped into two categories based on packaging format: Bulk packaging and Cut Tape (CT) packaging. Both packaging types are electrically and mechanically equivalent to the main part.

Parameter Comparison

Parameter	TCR22-8	P0111MA 1AA3	X00602MA 1AA2	X00602MA 5AL2	X00619MA5AL2	X0202DA 1BA2	X0202MA 1BA2
Manufacturer	Littelfuse Inc.	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics
Voltage - Off State	600 V	600 V	600 V	600 V	600 V	400 V	600 V
Voltage - Gate Trigger (Vgt) (Max)	800 mV	800 mV	800 mV	800 mV	800 mV	800 mV	800 mV
Current - Gate Trigger (Igt) (Max)	200 µA	25 µA	200 µA	200 µA	200 µA	200 µA	200 µA
Voltage - On State (Vtm) (Max)	1.5 V	1.95 V	1.35 V	1.35 V	1.35 V	1.45 V	1.45 V
Current - On State (It (RMS)) (Max)	1.5 A	800 mA	800 mA	800 mA	800 mA	1.25 A	1.25 A
Current - Hold (Ih) (Max)	5 mA	5 mA	5 mA	5 mA	5 mA	5 mA	5 mA
Operating Temperature Range	-40°C to 110°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 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 Formed Leads	TO-226-3, TO-92-3 Formed Leads	TO-226-3, TO-92-3	TO-226-3, TO-92-3
SCR Type	Sensitive Gate	Sensitive Gate	Sensitive Gate	Sensitive Gate	Sensitive Gate	Sensitive Gate	Sensitive Gate
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging Type	Bulk	Bulk	Bulk	Cut Tape (CT)	Cut Tape (CT)	Bulk	Bulk

Engineering Selection Recommendations

All substitute parts listed maintain Active product status and full RoHS3 compliance, meeting regulatory requirements equivalent to the TCR22-8. Selection among substitute parts depends on specific application requirements:

P0111MA 1AA3: Suitable for applications where lower gate trigger current (25 µA) is beneficial. On-state current rating of 800 mA RMS is lower than the main part; applications requiring full 1.5 A RMS capability should not use this substitute.

X00602MA 1AA2 and X00602MA 5AL2: Electrically identical specifications with 800 mA RMS on-state current. X00602MA 5AL2 is supplied in Cut Tape format with formed leads, suitable for automated assembly processes. X00602MA 1AA2 is supplied in Bulk packaging.

X00619MA5AL2: Functionally equivalent to X00602MA 5AL2 with identical electrical parameters and Cut Tape packaging with formed leads. Differs only in base product number designation.

X0202DA 1BA2: Rated for 400 V off-state voltage, which is lower than the TCR22-8 600 V rating. This part is suitable only for applications where maximum off-state voltage requirement does not exceed 400 V. On-state current rating of 1.25 A RMS is lower than the main part.

X0202MA 1BA2: Maintains 600 V off-state voltage rating with 1.25 A RMS on-state current. This part provides the closest current rating match to the TCR22-8 among all substitutes, though still lower than the 1.5 A RMS specification.

Frequently Asked Questions (FAQ)

Q: Can P0111MA 1AA3 be used as a direct replacement for TCR22-8?

A: P0111MA 1AA3 is electrically compatible in terms of voltage ratings and gate characteristics. However, its on-state current rating of 800 mA RMS is significantly lower than the TCR22-8 rating of 1.5 A RMS. Use this substitute only in applications where the actual operating current does not exceed 800 mA RMS.

Q: What is the difference between X00602MA 1AA2 and X00602MA 5AL2?

A: Both parts have identical electrical specifications. The primary difference is packaging: X00602MA 1AA2 is supplied in Bulk format, while X00602MA 5AL2 is supplied in Cut Tape (CT) format with formed leads. The formed leads in X00602MA 5AL2 are suitable for automated pick-and-place assembly equipment.

Q: Is X0202DA 1BA2 suitable for all TCR22-8 applications?

A: X0202DA 1BA2 has a lower off-state voltage rating of 400 V compared to the TCR22-8 rating of 600 V. This substitute is suitable only for applications where the maximum off-state voltage requirement does not exceed 400 V. Additionally, its on-state current rating of 1.25 A RMS is lower than the TCR22-8 specification.

Q: Why do some substitute parts have higher operating temperature ranges?

A: Substitute parts from STMicroelectronics are rated for -40°C to 125°C, compared to the TCR22-8 range of -40°C to 110°C. The higher upper temperature limit of substitute parts provides additional thermal margin and does not affect compatibility in applications operating within the TCR22-8 temperature range.

Q: Are all substitute parts RoHS3 compliant?

A: Yes, all substitute parts listed maintain RoHS3 compliance status, meeting the same regulatory requirements as the TCR22-8.

Q: What is the significance of "Sensitive Gate" classification?

A: Sensitive Gate SCR designation indicates that the device requires lower gate trigger current and voltage to initiate conduction. All listed parts, including the main part and substitutes, share this classification, ensuring consistent gate drive requirements across the substitution group.

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