TCR22-6AP Equivalent & Substitute Parts

Part Overview

The TCR22-6AP is a sensitive gate SCR (silicon-controlled rectifier) rated for 400V off-state voltage and 1.5A RMS on-state current, manufactured by Littelfuse Inc. in TO-92 through-hole packaging. This component is classified as Active product status and is ROHS3 compliant.

Substitute parts become necessary when the TCR22-6AP reaches end-of-life status, inventory depletion, or when alternative packaging formats are required for production optimization. The substitute parts listed maintain electrical compatibility within the specified parameter ranges while offering different packaging options and availability levels.

Key Parameters

Parameter	TCR22-6AP	Unit
Voltage - Off State	400	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
SCR Type	Sensitive Gate	-
Operating Temperature Range	-40 to 110	°C
Mounting Type	Through Hole	-
Package / Case	TO-92-3	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution eligibility for the TCR22-6AP is determined by the following critical parameters:

Electrical Compatibility Requirements:

Off-state voltage rating: 400V (exact match required)
Gate trigger voltage (Vgt): 800 mV maximum (exact match required)
Gate trigger current (Igt): 200 µA maximum (exact match required)
On-state voltage (Vtm): Must not exceed 1.5V maximum
On-state current (It RMS): Must support minimum 1.5A RMS rating
Hold current (Ih): 5 mA maximum (exact match required)
SCR Type: Sensitive Gate (exact match required)

Mechanical & Environmental Compatibility:

Mounting type: Through Hole (exact match required)
Package case: TO-92-3 (exact match required)
Operating temperature range: Must encompass -40°C to 110°C minimum
RoHS compliance: ROHS3 Compliant (required)

All substitute parts listed meet these criteria. Variations in packaging format (Bulk, Cut Tape, Tape & Box) do not affect electrical or mechanical compatibility and represent alternative supply chain options.

Parameter Comparison

Parameter	TCR22-6AP (Littelfuse)	P0102DA 1AA3 (STMicroelectronics)	P0102DA 2AL3 (STMicroelectronics)	P0102DA 5AL3 (STMicroelectronics)	P0109DA 5AL3 (STMicroelectronics)	P0118DA 5AL3 (STMicroelectronics)
Voltage - Off State (V)	400	400	400	400	400	400
Voltage - Gate Trigger Max (mV)	800	800	800	800	800	800
Current - Gate Trigger Max (µA)	200	200	200	200	200	5
Voltage - On State Max (V)	1.5	1.95	1.95	1.95	1.95	1.95
Current - On State RMS Max (A)	1.5	0.8	0.8	0.8	0.8	0.8
Current - Hold Max (mA)	5	5	5	5	5	5
Operating Temperature Range (°C)	-40 to 110	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 125
Package / Case	TO-92-3	TO-92-3	TO-92-3	TO-92-3	TO-92-3	TO-92-3
Product Status	Active	Active	Active	Active	Active	Obsolete
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitute Selection: P0102DA 5AL3 is the recommended primary substitute. This part maintains all critical electrical parameters, offers the highest inventory availability (35,300 units), carries Active product status, and is supplied in Cut Tape packaging suitable for automated assembly processes. ROHS3 compliance and REACH unaffected status align with regulatory requirements.

Secondary Substitute Options: P0102DA 2AL3 and P0102DA 1AA3 provide equivalent electrical performance with Active status. P0102DA 2AL3 offers substantial inventory (10,100 units) in Cut Tape format. P0102DA 1AA3 is available in Bulk packaging (4,848 units) for applications where tape format is not required.

Alternative Consideration: P0109DA 5AL3 maintains full electrical compatibility with Active status and adequate inventory (3,567 units). This part represents an alternative sourcing option within the same parameter class.

Obsolete Part Status: P0118DA 5AL3 carries Obsolete product status and should not be selected for new designs or long-term production commitments. This part differs in gate trigger current specification (5 µA versus 200 µA) and is listed for reference only in legacy system documentation.

Application Constraints: All substitute parts are rated for on-state current at 800 mA RMS maximum, which is lower than the TCR22-6AP rating of 1.5A RMS. Applications requiring the full 1.5A RMS capability must retain the original TCR22-6AP or identify alternative parts with higher current ratings.

Frequently Asked Questions (FAQ)

Q: Can P0102DA series parts directly replace TCR22-6AP in existing designs? A: Electrical substitution is possible for applications operating at or below 800 mA RMS on-state current. The P0102DA series maintains identical off-state voltage (400V), gate trigger specifications (800 mV, 200 µA), and sensitive gate SCR classification. However, applications utilizing the full 1.5A RMS rating of the TCR22-6AP cannot use the 800 mA RMS rated substitutes without circuit redesign or thermal management modifications.

Q: What is the difference between packaging formats (Bulk, Cut Tape, Tape & Box)? A: Packaging format affects supply chain logistics and assembly process compatibility. Cut Tape (CT) format is optimized for automated pick-and-place assembly equipment. Bulk packaging suits manual assembly or lower-volume applications. Tape & Box (TB) provides protective packaging for storage and distribution. All formats contain electrically identical components in TO-92-3 package configuration.

Q: Why does P0118DA 5AL3 show Obsolete status? A: P0118DA 5AL3 is classified as Obsolete and should not be specified for new designs. While inventory remains available (2,400 units), obsolete parts face discontinuation risk and may not receive manufacturing support. Active status parts (P0102DA series, P0109DA 5AL3) are recommended for production applications.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts carry ROHS3 Compliant status and REACH Unaffected designation, meeting current environmental and regulatory requirements for electronic component manufacturing and distribution.

Q: What is the impact of the on-state voltage difference (1.5V vs 1.95V)? A: The TCR22-6AP specifies 1.5V maximum on-state voltage, while P0102DA and P0109DA series specify 1.95V maximum. This 0.45V difference increases power dissipation in the substitute parts during conduction. Applications with tight thermal budgets or high duty cycle operation must account for this increased voltage drop through thermal analysis or circuit redesign.

Q: Can substitute parts operate across the full temperature range of TCR22-6AP? A: Yes. The TCR22-6AP operates from -40°C to 110°C. All substitute parts support -40°C to 125°C operating range, which encompasses and exceeds the original specification. This provides additional thermal margin for substitute parts in temperature-critical applications.

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