Q8016NH4TP TRIAC Alternistor 800V 16A Equivalent & Substitute Parts

Part Overview

The Q8016NH4TP is an 800V 16A TRIAC Alternistor manufactured by Littelfuse Inc. in a Surface Mount TO-263 (D2PAK) package. This snubberless thyristor is designed for AC switching applications requiring high voltage and current handling capability. The part is currently Active in product status with 863 units in stock. Equivalent and substitute parts are identified when design requirements allow for alternative electrical characteristics or when the primary part becomes unavailable.

Key Parameters

Parameter	Value
Manufacturer Part Number	Q8016NH4TP
Manufacturer	Littelfuse Inc.
Category	Thyristors
Triac Type	Alternistor - Snubberless
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)	35 mA
Current - Hold (Ih) (Max)	50 mA
Operating Temperature	-40°C ~ 125°C (TJ)
Mounting Type	Surface Mount
Package / Case	TO-263-3, D2PAK (2 Leads + Tab)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the Q8016NH4TP is determined by the following critical parameters:

Voltage Rating (Off State): All substitutes must maintain 800V off-state voltage rating for circuit compatibility
Package Type: All substitutes use TO-263-3 D2PAK surface mount package for PCB compatibility
Gate Trigger Characteristics: Voltage and current trigger parameters determine gate drive circuit compatibility
Operating Temperature Range: All substitutes maintain -40°C to 125°C operating range
Compliance: All substitutes are ROHS3 compliant with MSL 1 rating

The substitute parts are grouped by current rating and triac type. Parts with lower on-state current ratings (12A) are suitable for applications with reduced current requirements. The 25A part accommodates higher current demands. Triac type variation (Alternistor vs. Logic - Sensitive Gate) affects gate trigger current requirements and snubberless operation capability.

Parameter Comparison

Parameter	Q8016NH4TP (Main)	T1210-800G-TR	T1235-800G-TR	T2535-800G
Manufacturer	Littelfuse Inc.	STMicroelectronics	STMicroelectronics	STMicroelectronics
Triac Type	Alternistor - Snubberless	Logic - Sensitive Gate	Alternistor - Snubberless	Alternistor - Snubberless
Voltage - Off State	800 V	800 V	800 V	800 V
Current - On State (It (RMS)) (Max)	16 A	12 A	12 A	25 A
Voltage - Gate Trigger (Vgt) (Max)	1.3 V	1.3 V	1.3 V	1.3 V
Current - Gate Trigger (Igt) (Max)	35 mA	10 mA	35 mA	35 mA
Current - Hold (Ih) (Max)	50 mA	15 mA	35 mA	50 mA
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Package / Case	TO-263-3, D2PAK	TO-263-3, D2PAK	TO-263-3, D2PAK	TO-263-3, D2PAK
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

T1210-800G-TR (STMicroelectronics): This Logic - Sensitive Gate TRIAC is suitable for applications where the 16A current requirement can be reduced to 12A. The lower gate trigger current (10 mA) and hold current (15 mA) reduce gate drive circuit complexity. All compliance certifications match the main part. This substitute is appropriate for lower-power AC switching applications within the 800V rating.

T1235-800G-TR (STMicroelectronics): This Alternistor - Snubberless TRIAC maintains the same gate trigger and hold current characteristics as the main part while reducing on-state current to 12A. The snubberless design and electrical parameters are directly compatible with the Q8016NH4TP gate drive circuit. This substitute is appropriate for applications where 12A current capacity is sufficient.

T2535-800G (STMicroelectronics): This Alternistor - Snubberless TRIAC provides increased on-state current capacity at 25A, exceeding the main part's 16A rating. The gate trigger and hold current parameters match the main part exactly. This substitute is appropriate for applications requiring higher current handling while maintaining identical gate drive requirements. All compliance and thermal specifications align with the main part.

Frequently Asked Questions (FAQ)

Q: Can T1210-800G-TR replace Q8016NH4TP in all applications?

A: T1210-800G-TR is suitable only for applications where the on-state current requirement does not exceed 12A. The 800V voltage rating, D2PAK package, and operating temperature range are identical. Gate drive circuit compatibility is maintained due to matching Vgt specifications, though the lower Igt (10 mA vs. 35 mA) may require gate drive circuit adjustment.

Q: What is the difference between Alternistor and Logic - Sensitive Gate TRIAC types?

A: Alternistor - Snubberless TRIACs (Q8016NH4TP, T1235-800G-TR, T2535-800G) are designed for snubberless operation. Logic - Sensitive Gate TRIACs (T1210-800G-TR) have lower gate trigger current requirements. The choice depends on circuit design and snubber network requirements.

Q: Are all substitute parts pin-compatible with Q8016NH4TP?

A: Yes. All substitute parts use the TO-263-3 D2PAK package with identical pin configuration (2 Leads + Tab). PCB layout and footprint remain unchanged.

Q: Can T2535-800G be used as a direct upgrade for higher current applications?

A: T2535-800G provides 25A on-state current capacity compared to Q8016NH4TP's 16A. The 800V voltage rating, D2PAK package, gate trigger parameters, and operating temperature range are compatible. This part is suitable for applications requiring higher current handling within the same voltage and thermal constraints.

Q: Do all substitute parts meet the same compliance requirements?

A: Yes. All substitute parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level, matching the main part's compliance status.

Q: What is the impact of different gate trigger current (Igt) values on circuit design?

A: Gate trigger current affects gate drive circuit design. T1210-800G-TR requires 10 mA maximum, while Q8016NH4TP, T1235-800G-TR, and T2535-800G require 35 mA maximum. Lower Igt values reduce gate drive power requirements but may require circuit redesign for optimal performance.

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