Q6015L552 TRIAC 600V 15A TO-220 Equivalent & Substitute Parts

Part Overview

The Q6015L552 is a standard TRIAC rated for 600 V off-state voltage and 15 A on-state current in a TO-220 isolated tab package. Manufactured by Littelfuse Inc., this component is discontinued at DiGi Electronics. Equivalent and substitute parts are necessary to maintain circuit functionality in applications requiring 600 V thyristor switching capability. Substitute TRIACs from STMicroelectronics provide active product status with comparable electrical characteristics and identical mounting configuration.

Key Parameters

Parameter	Q6015L552
Voltage - Off State	600 V
Current - On State (It (RMS)) (Max)	15 A
Voltage - Gate Trigger (Vgt) (Max)	2 V
Current - Gate Trigger (Igt) (Max)	50 mA
Current - Hold (Ih) (Max)	70 mA
Current - Non Rep. Surge 50, 60Hz (Itsm)	167 A, 200 A
Operating Temperature	-40°C ~ 125°C (TJ)
Mounting Type	Through Hole
Package / Case	TO-220-3 Isolated Tab
Triac Type	Standard
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the Q6015L552 is determined by the following electrical and mechanical parameters:

Voltage Rating: 600 V off-state voltage is mandatory for direct substitution
Current Rating: On-state current must equal or exceed 15 A RMS
Package: TO-220-3 through-hole mounting is required for mechanical compatibility
Operating Temperature Range: -40°C to 125°C junction temperature
Gate Trigger Characteristics: Vgt and Igt parameters define gate sensitivity; substitutes with lower Igt values (sensitive gate types) are electrically compatible but require circuit validation for gate drive requirements
Compliance: ROHS3 compliance maintained across all substitutes

Substitute parts are grouped by current rating and TRIAC type (Standard, Alternistor - Snubberless, Logic - Sensitive Gate). Parts rated below 15 A are listed as lower-current alternatives; parts rated at or above 15 A provide direct substitution capability.

Parameter Comparison

Part Number	Manufacturer	Voltage - Off State	Current - On State (Max)	Vgt (Max)	Igt (Max)	Ih (Max)	Triac Type	Product Status
Q6015L552	Littelfuse Inc.	600 V	15 A	2 V	50 mA	70 mA	Standard	Discontinued
BTA06-600BWRG	STMicroelectronics	600 V	6 A	1.3 V	50 mA	50 mA	Alternistor - Snubberless	Active
BTA06-600CWRG	STMicroelectronics	600 V	6 A	1.3 V	35 mA	35 mA	Alternistor - Snubberless	Active
BTA06-600TWRG	STMicroelectronics	600 V	6 A	1.3 V	5 mA	10 mA	Logic - Sensitive Gate	Active
BTA08-600CWRG	STMicroelectronics	600 V	8 A	1.3 V	35 mA	35 mA	Alternistor - Snubberless	Active
BTA08-600SWRG	STMicroelectronics	600 V	8 A	1.3 V	10 mA	15 mA	Logic - Sensitive Gate	Active
BTA10-600BRG	STMicroelectronics	600 V	10 A	1.3 V	50 mA	50 mA	Standard	Active
BTA10-600CRG	STMicroelectronics	600 V	10 A	1.3 V	25 mA	25 mA	Standard	Active
BTA12-600BRG	STMicroelectronics	600 V	12 A	1.3 V	50 mA	50 mA	Standard	Active
BTA12-600CWRG	STMicroelectronics	600 V	12 A	1.3 V	35 mA	35 mA	Alternistor - Snubberless	Active
BTA12-600TWRG	STMicroelectronics	600 V	12 A	1.3 V	5 mA	10 mA	Logic - Sensitive Gate	Active

Engineering Selection Recommendations

Direct Substitution (15 A or Higher Current Rating): No substitute parts in the provided list meet or exceed the 15 A on-state current rating of the Q6015L552. The highest-rated alternatives are the BTA12 series at 12 A maximum on-state current.

Functional Alternatives (Lower Current Ratings): For applications where load current does not exceed the substitute part rating, the following active STMicroelectronics parts provide 600 V voltage compatibility and TO-220 package compatibility:

BTA12-600BRG, BTA12-600CWRG, BTA12-600TWRG (12 A maximum)
BTA10-600BRG, BTA10-600CRG (10 A maximum)
BTA08-600CWRG, BTA08-600SWRG (8 A maximum)
BTA06-600BWRG, BTA06-600CWRG, BTA06-600TWRG (6 A maximum)

All substitute parts maintain ROHS3 compliance and operate across the -40°C to 125°C temperature range. Selection between Standard, Alternistor - Snubberless, and Logic - Sensitive Gate types depends on circuit gate drive capability and snubber network requirements.

Frequently Asked Questions (FAQ)

Q: Can BTA12-600TWRG replace Q6015L552 in a 15 A application? A: No. BTA12-600TWRG is rated for 12 A maximum on-state current, which is below the 15 A requirement. Use only if application load current does not exceed 12 A RMS.

Q: What is the difference between Standard, Alternistor - Snubberless, and Logic - Sensitive Gate TRIAC types? A: Standard TRIACs require external snubber networks for EMI suppression. Alternistor - Snubberless types integrate snubber functionality internally. Logic - Sensitive Gate types feature reduced gate trigger current (Igt), enabling direct logic-level gate drive. Selection depends on circuit topology and gate drive source capability.

Q: Are all substitute parts pin-compatible with Q6015L552? A: Yes. All listed substitutes use TO-220-3 package with identical pin configuration (Gate, MT1, MT2). Physical mounting is directly compatible.

Q: Do substitute parts maintain the same voltage rating? A: Yes. All substitute parts are rated for 600 V off-state voltage, matching the Q6015L552 specification.

Q: Which substitute part has the lowest gate trigger current? A: BTA06-600TWRG and BTA12-600TWRG both feature 5 mA maximum gate trigger current (Igt), classified as Logic - Sensitive Gate types. These enable direct microcontroller or logic-level gate drive without additional amplification.

Q: Is RoHS compliance maintained across all substitutes? A: Yes. All substitute parts listed are ROHS3 compliant, matching the Q6015L552 compliance status.

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