Q8016RH6 TRIAC Alternistor 800V 16A TO-220 Equivalent & Substitute Parts

Part Overview

The Q8016RH6 is a Littelfuse TRIAC Alternistor (Snubberless) rated for 800V off-state voltage and 16A on-state current in a TO-220 through-hole package. This component is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active manufacturers. Substitute parts must maintain the same voltage and current ratings while accommodating variations in TRIAC type (Alternistor, Standard, or Logic - Sensitive Gate) and gate trigger characteristics.

Key Parameters

Parameter	Q8016RH6 Value	Unit
Voltage - Off State	800	V
Current - On State (It RMS) Max	16	A
Voltage - Gate Trigger (Vgt) Max	1.3	V
Current - Gate Trigger (Igt) Max	80	mA
Current - Hold (Ih) Max	70	mA
Current - Non Rep. Surge (50Hz/60Hz)	167A / 200A	A
TRIAC Type	Alternistor - Snubberless	—
Operating Temperature Range	-40 to 125	°C
Package / Case	TO-220-3	—
Mounting Type	Through Hole	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution logic is based on the following criteria:

Primary Matching Parameters:

Voltage - Off State: 800V (exact match required)
Current - On State: 16A (exact match required for direct substitution)
Package / Case: TO-220-3 (mechanical compatibility)
Mounting Type: Through Hole (assembly compatibility)

Secondary Compatibility Parameters:

Voltage - Gate Trigger (Vgt) Max: ≤ 1.3V (ensures gate drive compatibility)
TRIAC Type: Alternistor - Snubberless preferred; Standard or Logic - Sensitive Gate acceptable with circuit validation
Operating Temperature: -40°C to 125°C minimum (thermal envelope match)
RoHS Status: ROHS3 Compliant preferred for regulatory alignment

Acceptable Variations:

Current - Gate Trigger (Igt): Lower values acceptable (reduced gate drive requirement)
Current - Hold (Ih): Variations acceptable within circuit design margins
Current - Non Rep. Surge: Variations acceptable if ≥ 160A @ 50Hz

Substitutes are grouped by TRIAC type and current rating to facilitate selection based on application requirements.

Parameter Comparison

Part Number	Manufacturer	TRIAC Type	Voltage (V)	Current (A)	Vgt Max (V)	Igt Max (mA)	Ih Max (mA)	Temp Range (°C)	Status
Q8016RH6	Littelfuse	Alternistor - Snubberless	800	16	1.3	80	70	-40 to 125	Discontinued
BTA216-800B,127	WeEn Semiconductors	Standard	800	16	1.5	50	60	-40 to 125	Active
BTB16-800BRG	STMicroelectronics	Standard	800	16	1.3	50	50	-40 to 125	Active
BTB16-800BWRG	STMicroelectronics	Alternistor - Snubberless	800	16	1.3	50	50	-40 to 125	Active
BTB16-800CWRG	STMicroelectronics	Alternistor - Snubberless	800	16	1.3	35	35	-40 to 125	Active
BTB16-800SWRG	STMicroelectronics	Logic - Sensitive Gate	800	16	1.3	10	15	-40 to 125	Active
SST16B-800BW	SMC Diode Solutions	Standard	800	16	1.3	50	60	-40 to 125	Obsolete
T1235T-8T	STMicroelectronics	Alternistor - Snubberless	800	12	1.3	35	40	-40 to 150	Active
BTB08-800TWRG	STMicroelectronics	Logic - Sensitive Gate	800	8	1.3	5	10	-40 to 125	Active
BTB24-800BRG	STMicroelectronics	Standard	800	25	1.3	50	80	-40 to 125	Active
BTB24-800BWRG	STMicroelectronics	Alternistor - Snubberless	800	25	1.3	50	75	-40 to 125	Active

Engineering Selection Recommendations

Direct Substitutes (16A, 800V, Alternistor - Snubberless):

BTB16-800BWRG and BTB16-800CWRG from STMicroelectronics are the closest functional equivalents. Both maintain the Alternistor - Snubberless TRIAC type, 800V voltage rating, and 16A current rating. BTB16-800BWRG has higher gate trigger current (50mA vs. 80mA), while BTB16-800CWRG has lower gate trigger current (35mA). Both are ROHS3 compliant and active products with high inventory availability (25,200 and 55,100 units respectively).

Alternative Substitutes (16A, 800V, Standard TRIAC):

BTB16-800BRG (STMicroelectronics) and BTA216-800B,127 (WeEn Semiconductors) are Standard TRIAC types with identical voltage and current ratings. These are suitable where Alternistor characteristics are not required. BTB16-800BRG is ROHS3 compliant with 1,405 units in stock. BTA216-800B,127 is RoHS compliant with 1,047 units in stock but has slightly higher gate trigger voltage (1.5V vs. 1.3V).

Sensitive Gate Alternative (16A, 800V):

BTB16-800SWRG (STMicroelectronics) is a Logic - Sensitive Gate TRIAC with significantly lower gate trigger current (10mA). This variant is suitable for applications requiring minimal gate drive power. It is ROHS3 compliant with 1,623 units in stock.

Higher Current Alternative (25A, 800V):

BTB24-800BWRG (STMicroelectronics) provides increased current capacity (25A vs. 16A) while maintaining Alternistor - Snubberless characteristics and 800V rating. This is suitable for applications requiring higher current handling. It is ROHS3 compliant with 5,950 units in stock.

Lower Current Alternative (12A, 800V):

T1235T-8T (STMicroelectronics) is an Alternistor - Snubberless TRIAC with reduced current rating (12A vs. 16A) but extended operating temperature range (-40°C to 150°C). This is suitable for space-constrained or higher-temperature applications. It is ROHS3 compliant with 7,373 units in stock.

Avoid:

SST16B-800BW (SMC Diode Solutions) is marked Obsolete and should not be selected for new designs despite matching electrical parameters.

Frequently Asked Questions (FAQ)

Q: Can BTB16-800BWRG directly replace Q8016RH6 without circuit modification?

A: Yes. Both are 800V, 16A Alternistor - Snubberless TRIACs in TO-220-3 packages with identical gate trigger voltage (1.3V). The lower gate trigger current (50mA vs. 80mA) reduces gate drive requirements, which is beneficial. No circuit modification is required.

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

A: Alternistor - Snubberless TRIACs have integrated snubber networks that reduce EMI and allow operation without external snubber circuits. Standard TRIACs may require external snubber components in noise-sensitive applications. Both types are electrically compatible at the same voltage and current ratings.

Q: Can I use BTB24-800BWRG (25A) in place of Q8016RH6 (16A)?

A: Yes, from an electrical standpoint. The 25A TRIAC will handle 16A loads with margin. However, verify that the circuit design does not depend on the specific current rating of the original component. The higher current rating does not affect compatibility with 16A applications.

Q: Is BTA216-800B,127 suitable if gate trigger voltage is 1.5V instead of 1.3V?

A: Yes, for most applications. The 1.5V gate trigger voltage is slightly higher but remains within typical gate drive circuit tolerances. Verify gate drive circuit capability if operating near minimum voltage margins.

Q: Why is SST16B-800BW listed if it is obsolete?

A: SST16B-800BW is included for reference only to document historical equivalents. It should not be selected for new designs or long-term production due to obsolescence status.

Q: Can BTB16-800SWRG (Sensitive Gate, 10mA Igt) replace Q8016RH6 (80mA Igt)?

A: Yes, electrically compatible. The Sensitive Gate variant requires significantly less gate drive current, which reduces power consumption and simplifies gate drive circuits. This is an advantage in most applications.

Q: What is the significance of ROHS3 compliance?

A: ROHS3 compliance indicates the component meets Restriction of Hazardous Substances Directive requirements, including lead-free solder compatibility and restricted substance limits. All recommended active substitutes are ROHS3 compliant, ensuring compatibility with modern manufacturing processes.

Q: Are all substitute parts available in the same TO-220-3 package?

A: Yes. All listed substitutes use TO-220-3 through-hole packages with identical pin configurations and mechanical dimensions, ensuring direct PCB compatibility without layout modifications.

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