Q8012NH2TP TRIAC Alternistor 800V 12A Equivalent & Substitute Parts

Part Overview

The Q8012NH2TP is an 800V, 12A snubberless TRIAC Alternistor manufactured by Littelfuse Inc., designed for surface mount applications in TO-263 (D2PAK) packaging. This component is classified as Active product status with full RoHS3 compliance. Equivalent and substitute parts are identified when design requirements necessitate alternative sourcing, inventory availability, or specific gate sensitivity characteristics while maintaining electrical and mechanical compatibility within the defined parameter envelope.

Key Parameters

Parameter	Value	Unit
Voltage - Off State	800	V
Current - On State (It (RMS)) (Max)	12	A
Voltage - Gate Trigger (Vgt) (Max)	1.3	V
Current - Gate Trigger (Igt) (Max)	10	mA
Current - Hold (Ih) (Max)	15	mA
Operating Temperature Range	-40 to 125	°C
Package / Case	TO-263-3, D2PAK	-
Mounting Type	Surface Mount	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution eligibility for the Q8012NH2TP is determined by the following critical parameters:

Voltage Rating (Off State): Must equal 800V minimum
Current Rating (On State): Must equal or exceed 12A RMS
Gate Trigger Voltage (Vgt): Must not exceed 1.3V maximum
Gate Trigger Current (Igt): Must not exceed 10mA maximum
Hold Current (Ih): Must not exceed 15mA maximum
Package Type: Must be TO-263-3 (D2PAK) surface mount configuration
Temperature Range: Must support -40°C to 125°C operating envelope
Compliance: RoHS3 compliance required

Two substitute parts meet these criteria with documented compatibility:

T1210-800G-TR (STMicroelectronics): Matches all critical parameters with Logic - Sensitive Gate configuration. Voltage, current ratings, gate characteristics, and package are identical. Non-repetitive surge current is higher (120A/126A vs. 110A/120A), indicating enhanced transient capability.

BTA316B-800E,118 (WeEn Semiconductors): Exceeds current rating at 16A maximum (vs. 12A required), with marginally higher gate trigger voltage at 1.5V (vs. 1.3V maximum). Non-repetitive surge current is significantly higher (140A/150A). This part provides design margin for higher current applications within the same voltage class and package.

Parameter Comparison

Parameter	Q8012NH2TP (Littelfuse)	T1210-800G-TR (STMicroelectronics)	BTA316B-800E,118 (WeEn)
Triac Type	Alternistor - Snubberless	Logic - Sensitive Gate	Logic - Sensitive Gate
Voltage - Off State	800 V	800 V	800 V
Current - On State (It (RMS)) (Max)	12 A	12 A	16 A
Voltage - Gate Trigger (Vgt) (Max)	1.3 V	1.3 V	1.5 V
Current - Gate Trigger (Igt) (Max)	10 mA	10 mA	10 mA
Current - Hold (Ih) (Max)	15 mA	15 mA	15 mA
Current - Non Rep. Surge 50, 60Hz (Itsm)	110A, 120A	120A, 126A	140A, 150A
Operating Temperature	-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
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant
Product Status	Active	Active	Active

Engineering Selection Recommendations

T1210-800G-TR is the direct functional equivalent. All electrical parameters match the Q8012NH2TP specification envelope. Both components maintain ROHS3 compliance and Active product status. This substitute is appropriate for direct replacement in existing designs without circuit modification.

BTA316B-800E,118 provides enhanced current capability (16A vs. 12A) and higher non-repetitive surge ratings. The gate trigger voltage specification of 1.5V (vs. 1.3V maximum) represents a 0.2V deviation. This part is suitable for applications requiring design margin or higher transient current handling, provided gate drive circuitry is verified for compatibility with the slightly higher trigger voltage threshold. RoHS compliance is confirmed; ROHS3 designation is not specified.

Both substitute parts are Active status with confirmed inventory availability and maintain the required TO-263 (D2PAK) surface mount package configuration.

Frequently Asked Questions (FAQ)

Q: Can T1210-800G-TR replace Q8012NH2TP in existing designs without modification?

A: Yes. The T1210-800G-TR matches all critical electrical parameters: 800V off-state voltage, 12A on-state current, 1.3V maximum gate trigger voltage, 10mA maximum gate trigger current, and 15mA maximum hold current. Package, mounting type, and temperature range are identical. Direct substitution is supported.

Q: What is the difference between Alternistor and Logic gate TRIAC types?

A: The Q8012NH2TP is classified as Alternistor - Snubberless, while both substitute parts are Logic - Sensitive Gate types. Both are TRIAC devices rated for 800V operation. The functional difference relates to internal gate sensitivity and snubber circuit integration, but electrical parameter compatibility is maintained across all three parts for this application envelope.

Q: Is BTA316B-800E,118 a direct replacement for Q8012NH2TP?

A: BTA316B-800E,118 is functionally compatible but not a direct 1:1 replacement. The 16A current rating exceeds the 12A requirement, and the 1.5V gate trigger voltage is 0.2V higher than the 1.3V maximum specification. For applications designed to the Q8012NH2TP specification, this part provides design margin. Gate drive circuit verification is recommended to confirm compatibility with the higher trigger voltage threshold.

Q: Are all three parts RoHS compliant?

A: Q8012NH2TP and T1210-800G-TR are ROHS3 Compliant. BTA316B-800E,118 is RoHS Compliant. Both designations indicate compliance with RoHS directives; ROHS3 represents the most current revision. All three parts are suitable for RoHS-regulated applications.

Q: What is the significance of the TO-263 (D2PAK) package for these TRIAC devices?

A: TO-263-3 (D2PAK) is a surface mount package with two leads plus a thermal tab. All three parts use this identical package configuration, ensuring mechanical and thermal compatibility on PCB layouts. The thermal tab provides enhanced heat dissipation for 12-16A current applications.

Q: Can these parts be used interchangeably in high-temperature applications?

A: All three parts support the -40°C to 125°C operating temperature range. They are suitable for equivalent thermal environments. No temperature-related restrictions apply to substitution within this range.

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