TOPT12-800C0,127 TRIAC 800V 12A TO-220AB Equivalent & Substitute Parts

Part Overview

The TOPT12-800C0,127 is a standard TRIAC thyristor manufactured by WeEn Semiconductors, rated for 800V off-state voltage and 12A on-state current in a Through Hole TO-220AB package. This component is in active product status with 823 units in current inventory. Equivalent and substitute parts are identified based on matching electrical specifications and mechanical compatibility within the 800V TRIAC category, enabling component sourcing flexibility across multiple manufacturers including STMicroelectronics, onsemi, and Littelfuse Inc.

Key Parameters

Parameter	TOPT12-800C0,127
Voltage - Off State	800 V
Current - On State (It (RMS)) (Max)	12 A
Voltage - Gate Trigger (Vgt) (Max)	2.3 V
Current - Gate Trigger (Igt) (Max)	35 mA
Current - Hold (Ih) (Max)	35 mA
Current - Non Rep. Surge 50, 60Hz (Itsm)	95A, 104A
Operating Temperature (TJ)	150°C
Package / Case	TO-220-3
Mounting Type	Through Hole
Triac Type	Standard

Substitute Part Grouping Explanation

Substitution logic for the TOPT12-800C0,127 is based on the following criteria:

Primary Substitutes (Direct Current Rating Match - 12A):

MAC12NG (Littelfuse Inc.): Matches 800V, 12A rating with identical gate trigger and hold current specifications. Standard TRIAC type with TO-220AB package.

Secondary Substitutes (Reduced Current Rating - 8-10A):

ACST830-8T (STMicroelectronics): 800V, 8A rating. Lower on-state current but maintains 800V voltage class and TO-220 package compatibility.
BTA08-800CW3G (onsemi): 800V, 8A rating. Equivalent voltage class with reduced current capacity in TO-220AB package.
BTA10-800CWRG (STMicroelectronics): 800V, 10A rating. Snubberless TRIAC type with intermediate current rating between 8A and 12A substitutes.

Tertiary Substitute (Reduced Current Rating - 6A):

Q8006RH4TP (Littelfuse Inc.): 800V, 6A rating. Snubberless TRIAC type with lowest current capacity in this substitute group.

All substitutes maintain 800V off-state voltage, TO-220-3 package configuration, and Through Hole mounting type. Gate trigger voltage (Vgt) and gate trigger current (Igt) specifications remain within acceptable ranges across all substitutes.

Parameter Comparison

Parameter	TOPT12-800C0,127	MAC12NG	BTA10-800CWRG	ACST830-8T	BTA08-800CW3G	Q8006RH4TP
Manufacturer	WeEn Semiconductors	Littelfuse Inc.	STMicroelectronics	STMicroelectronics	onsemi	Littelfuse Inc.
Voltage - Off State	800 V	800 V	800 V	800 V	800 V	800 V
Current - On State (It (RMS)) (Max)	12 A	12 A	10 A	8 A	8 A	6 A
Voltage - Gate Trigger (Vgt) (Max)	2.3 V	1.5 V	1.3 V	1 V	1.1 V	1.3 V
Current - Gate Trigger (Igt) (Max)	35 mA	35 mA	35 mA	30 mA	35 mA	35 mA
Current - Hold (Ih) (Max)	35 mA	40 mA	35 mA	30 mA	35 mA	35 mA
Operating Temperature (TJ)	150°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Package / Case	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3
Triac Type	Standard	Standard	Alternistor - Snubberless	Standard	Standard	Alternistor - Snubberless
Product Status	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

MAC12NG (Littelfuse Inc.) is the primary equivalent substitute, offering identical 12A current rating and 800V voltage specification. Both components are active products with full inventory availability. MAC12NG carries RoHS3 compliance and REACH unaffected status, matching the regulatory profile of the original part.

BTA10-800CWRG (STMicroelectronics) provides a 10A intermediate option within the Snubberless TRIAC series. This component is suitable for applications where the full 12A capacity is not required but higher current handling than 8A substitutes is necessary. Active product status with 1500 units in inventory.

ACST830-8T (STMicroelectronics) and BTA08-800CW3G (onsemi) are 8A-rated alternatives for applications with reduced current requirements. Both maintain 800V voltage class and TO-220-3 package compatibility. ACST830-8T offers the lowest gate trigger voltage (1V) among all substitutes.

Q8006RH4TP (Littelfuse Inc.) is a 6A Snubberless TRIAC option for minimal current applications. This component is suitable only where circuit design permits operation at reduced current levels.

All substitute parts maintain active product status and are available in current inventory. Selection should be based on application current requirements and thermal management considerations.

Frequently Asked Questions (FAQ)

Q: Can MAC12NG directly replace TOPT12-800C0,127 in all applications?

A: MAC12NG is the direct equivalent substitute, matching both the 12A current rating and 800V voltage specification. Both components use identical TO-220-3 package and Through Hole mounting. Substitution is valid for applications requiring the full 12A capacity.

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

A: Standard TRIACs (TOPT12-800C0,127, MAC12NG, ACST830-8T, BTA08-800CW3G) are conventional thyristor designs. Snubberless TRIACs (BTA10-800CWRG, Q8006RH4TP) incorporate integrated snubber networks for improved EMI performance and reduced external component requirements. Snubberless types are suitable for applications where EMI filtering is critical.

Q: Can I use an 8A substitute in place of the 12A TOPT12-800C0,127?

A: 8A substitutes (ACST830-8T, BTA08-800CW3G) can be used only if circuit design and load requirements do not exceed 8A continuous current. Using a lower-rated component in a 12A application will result in thermal stress and potential component failure.

Q: What is the significance of gate trigger voltage (Vgt) differences?

A: Gate trigger voltage determines the minimum gate voltage required to initiate TRIAC conduction. TOPT12-800C0,127 specifies 2.3V maximum, while substitutes range from 1V to 1.5V. Lower Vgt values in substitutes indicate more sensitive gate triggering, which may require circuit design adjustment in gate drive circuits.

Q: Are all substitutes RoHS and REACH compliant?

A: MAC12NG, BTA10-800CWRG, ACST830-8T, BTA08-800CW3G, and Q8006RH4TP all carry RoHS3 compliance and REACH unaffected status. Regulatory compliance is consistent across all listed substitutes.

Q: What is the operating temperature difference between TOPT12-800C0,127 and substitutes?

A: TOPT12-800C0,127 specifies 150°C maximum junction temperature, while all substitutes specify -40°C to 125°C operating range. Applications requiring operation above 125°C are limited to the original TOPT12-800C0,127 component.

Q: Can Snubberless TRIACs be used in applications designed for Standard TRIACs?

A: Snubberless TRIACs (BTA10-800CWRG, Q8006RH4TP) can replace Standard TRIACs in most applications. The integrated snubber network provides additional EMI filtering without requiring external components. Circuit performance may improve due to reduced noise and switching transients.

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