Q2015L5 TRIAC Equivalent & Substitute Parts

Part Overview

The Q2015L5 is a standard TRIAC manufactured by Littelfuse Inc., rated for 200V off-state voltage and 15A on-state current in a TO-220 isolated tab package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	Q2015L5
Manufacturer	Littelfuse Inc.
Category	Thyristors
Description	TRIAC 200V 15A TO220
Triac Type	Standard
Voltage - Off State	200 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
Operating Temperature	-40°C ~ 125°C (TJ)
Mounting Type	Through Hole
Package / Case	TO-220-3 Isolated Tab
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the Q2015L5 is determined by the following critical parameters:

Voltage Rating (Off State): Substitute parts must equal or exceed 200V to maintain circuit protection margins
Current Rating (On State): Substitute parts must equal or exceed 15A to handle design load requirements
Gate Trigger Characteristics: Vgt and Igt parameters must be compatible with existing gate drive circuitry
Mounting Type: Through-hole TO-220 package variants ensure mechanical and thermal compatibility
Operating Temperature Range: Substitute parts must support the -40°C to 125°C operating window
RoHS Compliance: Active substitute parts must maintain regulatory compliance status

The two substitute parts listed (BT139X-600G,127 and BTA16-600BWRG) exceed the Q2015L5 voltage and current ratings, providing design margin while maintaining functional compatibility through equivalent gate trigger and hold current specifications.

Parameter Comparison

Parameter	Q2015L5 (Main)	BT139X-600G,127 (Substitute)	BTA16-600BWRG (Substitute)
Manufacturer	Littelfuse Inc.	WeEn Semiconductors	STMicroelectronics
Triac Type	Standard	Standard	Alternistor - Snubberless
Voltage - Off State	200 V	600 V	600 V
Current - On State (It (RMS)) (Max)	15 A	16 A	16 A
Voltage - Gate Trigger (Vgt) (Max)	2 V	1.5 V	1.3 V
Current - Gate Trigger (Igt) (Max)	50 mA	50 mA	50 mA
Current - Hold (Ih) (Max)	70 mA	60 mA	50 mA
Operating Temperature	-40°C ~ 125°C (TJ)	125°C (TJ)	-40°C ~ 125°C (TJ)
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	TO-220-3 Isolated Tab	TO-220-3 Full Pack, Isolated Tab	TO-220-3
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	RoHS Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Both substitute parts are active products with current manufacturing support, addressing the obsolescence of the Q2015L5.

BT139X-600G,127 (WeEn Semiconductors): Active product status with RoHS compliance. Voltage and current ratings exceed Q2015L5 specifications. Gate trigger voltage is lower (1.5V vs 2V), requiring gate drive circuit verification. Operating temperature specification limited to 125°C maximum without lower temperature bound documentation.

BTA16-600BWRG (STMicroelectronics): Active product with ROHS3 compliance and REACH unaffected status. Snubberless Alternistor technology provides enhanced performance characteristics. Voltage and current ratings exceed Q2015L5 specifications. Gate trigger voltage is lower (1.3V vs 2V). Full operating temperature range (-40°C ~ 125°C) matches Q2015L5 specification. Higher inventory availability supports procurement reliability.

Frequently Asked Questions (FAQ)

Q: Can the Q2015L5 be directly replaced with BT139X-600G,127 or BTA16-600BWRG?

A: Both substitute parts are functionally compatible as direct replacements. The higher voltage ratings (600V vs 200V) and equivalent current ratings (16A vs 15A) provide design margin. Gate trigger voltage differences require circuit-level verification to ensure gate drive circuitry operates within specified parameters.

Q: What is the significance of the voltage rating difference?

A: The Q2015L5 is rated for 200V off-state voltage. Both substitutes are rated for 600V. In applications where the circuit voltage does not exceed 200V, the higher rating of substitute parts provides additional safety margin and component reliability. No circuit modification is required.

Q: Are the TO-220 package variants mechanically compatible?

A: All three parts use TO-220 through-hole packages. The Q2015L5 specifies isolated tab configuration, while BT139X-600G,127 offers both full pack and isolated tab options, and BTA16-600BWRG uses standard TO-220-3. Mechanical fit and thermal interface compatibility depend on specific PCB design and heatsink mounting. Verify package variant selection against board layout requirements.

Q: What is the difference between Standard and Alternistor - Snubberless TRIAC types?

A: The Q2015L5 and BT139X-600G,127 are standard TRIACs. The BTA16-600BWRG is an Alternistor - Snubberless type, which incorporates integrated snubber functionality. This reduces external component requirements in some applications but requires gate drive circuit compatibility verification.

Q: How do gate trigger parameters affect substitution?

A: Gate trigger voltage (Vgt) and current (Igt) determine the signal level required to turn on the TRIAC. The Q2015L5 specifies Vgt max of 2V. Substitutes have lower Vgt values (1.5V and 1.3V respectively), meaning they trigger at lower gate voltages. Existing gate drive circuits must be verified to operate within these lower thresholds.

Q: What is the product status significance?

A: The Q2015L5 is obsolete, meaning Littelfuse Inc. no longer manufactures or supports this part. Both substitute parts are active products with ongoing manufacturing, technical support, and long-term availability assurance.

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