Q6006LTH TRIAC Equivalent & Substitute Parts

Part Overview

The Q6006LTH is an internally triggered TRIAC manufactured by Littelfuse Inc., rated for 600 V off-state voltage and 6 A on-state current in a TO-220-3 isolated tab package. This component is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active product lines. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating variations in gate trigger characteristics and triac type classifications.

Key Parameters

Parameter	Q6006LTH Value
Voltage - Off State	600 V
Current - On State (It (RMS)) (Max)	6 A
Current - Non Rep. Surge 50, 60Hz (Itsm)	65A, 80A
Current - Hold (Ih) (Max)	50 mA
Operating Temperature	-40°C ~ 125°C (TJ)
Mounting Type	Through Hole
Package / Case	TO-220-3 Isolated Tab
Configuration	Single
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the Q6006LTH is determined by the following criteria:

Primary Electrical Requirements:

Voltage - Off State: 600 V (mandatory match)
Current - On State (It (RMS)) (Max): 6 A minimum
Operating Temperature Range: -40°C ~ 125°C (TJ)
Configuration: Single
Mounting Type: Through Hole
Package / Case: TO-220-3 compatible

Secondary Compatibility Factors:

Triac Type: Internally triggered, Alternistor - Snubberless, or Logic - Sensitive Gate variants are acceptable
Current - Hold (Ih) (Max): Values of 35 mA to 50 mA are compatible
Current - Gate Trigger (Igt) (Max): Variations from 5 mA to 50 mA do not preclude substitution
Voltage - Gate Trigger (Vgt) (Max): 1.3 V maximum across all substitutes

Substitute parts meeting these criteria are grouped by current rating (6 A, 8 A, 10 A, 12 A) and triac type classification. Parts with current ratings exceeding 6 A provide design margin and are functionally compatible for applications not current-limited.

Parameter Comparison

Parameter	Q6006LTH	BTA06-600BWRG	BTA06-600CWRG	BTA06-600TWRG	BTA08-600CWRG	BTA08-600SWRG	BTA10-600BRG	BTA10-600CRG	BTA12-600BRG	BTA12-600CWRG	BTA12-600TWRG
Manufacturer	Littelfuse Inc.	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics
Voltage - Off State	600 V	600 V	600 V	600 V	600 V	600 V	600 V	600 V	600 V	600 V	600 V
Current - On State (It (RMS)) (Max)	6 A	6 A	6 A	6 A	8 A	8 A	10 A	10 A	12 A	12 A	12 A
Voltage - Gate Trigger (Vgt) (Max)	—	1.3 V	1.3 V	1.3 V	1.3 V	1.3 V	1.3 V	1.3 V	1.3 V	1.3 V	1.3 V
Current - Non Rep. Surge 50, 60Hz (Itsm)	65A, 80A	60A, 63A	60A, 63A	60A, 63A	80A, 84A	80A, 84A	100A, 105A	100A, 105A	120A, 126A	120A, 126A	120A, 126A
Current - Gate Trigger (Igt) (Max)	—	50 mA	35 mA	5 mA	35 mA	10 mA	50 mA	25 mA	50 mA	35 mA	5 mA
Current - Hold (Ih) (Max)	50 mA	50 mA	35 mA	10 mA	35 mA	15 mA	50 mA	25 mA	50 mA	35 mA	10 mA
Operating Temperature	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	TO-220-3 Isolated Tab	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3
Configuration	Single	Single	Single	Single	Single	Single	Single	Single	Single	Single	Single
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Discontinued at DiGi Electronics	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Direct 6 A Rated Substitutes (Preferred for Current-Limited Applications):

BTA06-600BWRG, BTA06-600CWRG, and BTA06-600TWRG are STMicroelectronics Snubberless and Logic - Sensitive Gate variants rated at 6 A, matching the Q6006LTH current specification. All three are ROHS3 compliant with active product status and identical operating temperature ranges. Selection among these three depends on gate trigger requirements: BTA06-600BWRG provides 50 mA gate trigger current matching the original part, BTA06-600CWRG reduces this to 35 mA, and BTA06-600TWRG offers 5 mA for sensitive gate applications.

Higher Current Rated Substitutes (Design Margin Applications):

BTA08-600CWRG and BTA08-600SWRG (8 A), BTA10-600BRG and BTA10-600CRG (10 A), and BTA12-600BRG, BTA12-600CWRG, and BTA12-600TWRG (12 A) are functionally compatible for circuits not current-limited to 6 A. These parts provide increased surge current capacity and are all ROHS3 compliant with active product status. Higher current ratings do not compromise performance in applications designed for lower currents.

Compliance and Availability:

All substitute parts maintain ROHS3 compliance and active manufacturing status, ensuring long-term supply chain stability. Inventory levels vary; BTA12-600BRG shows highest availability at 212,600 units, while BTA10-600BRG and BTA10-600CRG show lower stock levels at approximately 1,400 units each.

Frequently Asked Questions (FAQ)

Q: Can I use a BTA12-600CWRG in place of the Q6006LTH?

A: Yes. The BTA12-600CWRG maintains the required 600 V off-state voltage, -40°C to 125°C operating temperature, TO-220-3 package, and ROHS3 compliance. The 12 A current rating exceeds the 6 A requirement, providing design margin. Gate trigger specifications differ (35 mA vs. unspecified for Q6006LTH), but this does not preclude substitution if circuit gate drive capability accommodates this value.

Q: What is the difference between BTA06-600BWRG, BTA06-600CWRG, and BTA06-600TWRG?

A: All three are 6 A rated, 600 V TRIACs in TO-220-3 packages with identical voltage and current specifications. They differ in triac type and gate trigger characteristics. BTA06-600BWRG is Alternistor - Snubberless with 50 mA gate trigger current. BTA06-600CWRG is also Alternistor - Snubberless but with 35 mA gate trigger current. BTA06-600TWRG is Logic - Sensitive Gate with 5 mA gate trigger current, suitable for low-power gate drive circuits.

Q: Is the TO-220-3 isolated tab package of the Q6006LTH compatible with standard TO-220-3 packages?

A: The Q6006LTH uses TO-220-3 Isolated Tab, while substitute parts use standard TO-220-3. Both are mechanically compatible for through-hole mounting. The isolated tab variant provides electrical isolation of the tab from the die; standard TO-220-3 packages do not. Verify thermal management requirements and PCB layout to confirm compatibility in your application.

Q: Why do some substitute parts have lower gate trigger current specifications?

A: Gate trigger current (Igt) varies by triac type. Logic - Sensitive Gate variants (BTA06-600TWRG, BTA08-600SWRG, BTA12-600TWRG) are designed for low-power gate drive circuits and specify 5-10 mA. Alternistor - Snubberless and Standard types specify 25-50 mA. Lower values require less gate drive power but may be more sensitive to noise. Selection depends on circuit gate drive capability and noise immunity requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant, matching the Q6006LTH compliance status. This ensures compatibility with RoHS-regulated supply chains and end-use applications.

Q: What is the inventory status for these substitute parts?

A: All substitute parts maintain active product status with STMicroelectronics. Inventory levels vary by part number and distributor. BTA12-600BRG shows the highest availability at 212,600 units. BTA06-600CWRG shows 18,654 units. Consult your distributor for current stock levels and lead times.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message