MAC16HCNG TRIAC Equivalent & Substitute Parts

Part Overview

The MAC16HCNG is a standard TRIAC thyristor manufactured by Littelfuse Inc., rated for 800V off-state voltage and 16A on-state current in a TO-220AB through-hole package. This component is active in production with full RoHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across the specified parameter range, enabling component sourcing flexibility while preserving circuit functionality.

Key Parameters

Parameter	Value	Unit
Voltage - Off State	800	V
Current - On State (It RMS) Max	16	A
Voltage - Gate Trigger (Vgt) Max	1.5	V
Current - Gate Trigger (Igt) Max	50	mA
Current - Hold (Ih) Max	50	mA
Operating Temperature Range	-40 to 125	°C
Package / Case	TO-220-3	—
Mounting Type	Through Hole	—

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict adherence to the following electrical and mechanical criteria:

Primary Substitution Criteria:

Voltage - Off State: 800V (exact match required)
Current - On State (It RMS) Max: 16A minimum
Package / Case: TO-220-3 (mechanical compatibility)
Mounting Type: Through Hole (board-level compatibility)
Configuration: Single (functional equivalence)

Secondary Compatibility Parameters:

Voltage - Gate Trigger (Vgt) Max: 1.5V or lower (ensures gate drive compatibility)
Current - Gate Trigger (Igt) Max: 50mA or lower (gate circuit compatibility)
Current - Hold (Ih) Max: 50mA or lower (holding current compatibility)
RoHS3 Compliance: Required for regulatory equivalence

Parts meeting all primary criteria and secondary parameters are classified as direct parametric equivalents. Parts with reduced on-state current (below 16A) or modified gate characteristics are listed as functional alternatives with noted parameter deviations.

Parameter Comparison

Part Number	Manufacturer	Triac Type	Voltage - Off State (V)	Current - On State Max (A)	Vgt Max (V)	Igt Max (mA)	Ih Max (mA)	Operating Temp (°C)	Package	Inventory Status
MAC16HCNG	Littelfuse Inc.	Standard	800	16	1.5	50	50	-40 to 125	TO-220AB	2200 Pcs
MAC16NG	Littelfuse Inc.	Standard	800	16	1.5	50	50	-40 to 125	TO-220AB	1296 Pcs
BTA316-800B,127	WeEn Semiconductors	Standard	800	16	1.5	50	60	-40 to 125	TO-220AB	22100 Pcs
T1235T-8T	STMicroelectronics	Alternistor - Snubberless	800	12	1.3	35	40	-40 to 150	TO-220	7373 Pcs
T1635T-8I	STMicroelectronics	Alternistor - Snubberless	800	16	1.3	35	45	-40 to 150	TO-220AB Insulated	25400 Pcs
T1635T-8T	STMicroelectronics	Alternistor - Snubberless	800	16	1.3	35	40	-40 to 150	TO-220	1411 Pcs
T635T-8T	STMicroelectronics	Alternistor - Snubberless	800	6	1.3	35	40	-40 to 150	TO-220	5337 Pcs
T835T-8T	STMicroelectronics	Alternistor - Snubberless	800	8	1.3	35	40	-40 to 150	TO-220	2230 Pcs

Engineering Selection Recommendations

Direct Parametric Equivalents (Full Substitution):

MAC16NG (Littelfuse Inc.) is a direct parametric equivalent with identical electrical specifications and packaging. Both components are standard TRIACs with matching voltage, current, and gate characteristics. Substitution is valid for all applications where MAC16HCNG is specified. The only difference is packaging format (Box vs. Tube).

BTA316-800B,127 (WeEn Semiconductors) meets all primary substitution criteria with 800V off-state voltage and 16A on-state current in TO-220AB package. Gate trigger voltage and current are within specification. Hold current is 60mA, which exceeds the 50mA maximum of the original part but remains within acceptable thyristor operating margins. This part is active in production with RoHS3 compliance and high inventory availability.

Functional Alternatives with Parameter Deviations:

T1635T-8I and T1635T-8T (STMicroelectronics) are Alternistor-type snubberless TRIACs with 16A on-state current and 800V off-state voltage. Both parts feature lower gate trigger voltage (1.3V vs. 1.5V) and reduced gate trigger current (35mA vs. 50mA), resulting in improved gate sensitivity. Operating temperature range extends to 150°C. T1635T-8I is supplied in insulated TO-220AB package; T1635T-8T uses standard TO-220 package. These parts are suitable for applications where enhanced gate drive performance and extended temperature operation are beneficial.

T1235T-8T (STMicroelectronics) is a 12A snubberless TRIAC with reduced on-state current rating. This part is applicable only in circuits where 12A maximum current is acceptable and does not exceed design requirements.

T635T-8T and T835T-8T (STMicroelectronics) are snubberless TRIACs with 6A and 8A on-state current ratings respectively. These parts are suitable only for applications with correspondingly reduced current requirements and do not provide full substitution for 16A-rated designs.

All substitute parts maintain RoHS3 compliance and unlimited moisture sensitivity rating.

Frequently Asked Questions (FAQ)

Q: Can MAC16NG replace MAC16HCNG in all applications?

A: Yes. MAC16NG is a direct parametric equivalent with identical electrical specifications (800V, 16A, 1.5V gate trigger, 50mA gate current, 50mA hold current) and the same TO-220AB package. The only difference is packaging format (Box vs. Tube). No circuit modifications are required.

Q: What is the difference between standard TRIAC and Alternistor-type TRIAC?

A: Alternistor-type TRIACs (T-series from STMicroelectronics) are snubberless designs with improved gate sensitivity (lower Vgt and Igt) and extended operating temperature range (-40°C to 150°C vs. -40°C to 125°C). Standard TRIACs (MAC-series) provide conventional thyristor characteristics. Both types are electrically compatible at the specified voltage and current ratings, but Alternistor designs may eliminate the need for external snubber circuits in some applications.

Q: Can I use BTA316-800B,127 as a direct replacement?

A: Yes, with one parameter note. BTA316-800B,127 meets all primary substitution criteria: 800V off-state voltage, 16A on-state current, and TO-220AB package. Hold current is 60mA, which exceeds the MAC16HCNG specification of 50mA maximum. This difference is within normal thyristor operating margins and does not affect circuit functionality. The part is active in production with RoHS3 compliance.

Q: Why would I choose T1635T-8I over MAC16HCNG?

A: T1635T-8I offers three advantages: (1) Lower gate trigger voltage (1.3V vs. 1.5V) and current (35mA vs. 50mA) for improved gate drive efficiency, (2) Extended operating temperature range to 150°C, and (3) Insulated TO-220AB package for applications requiring electrical isolation. Electrical current and voltage ratings are identical at 16A and 800V.

Q: Are T635T-8T and T835T-8T suitable replacements?

A: No. T635T-8T and T835T-8T have reduced on-state current ratings (6A and 8A respectively) and are not suitable for applications requiring 16A capacity. These parts are applicable only in circuits with lower current requirements.

Q: What does "TO-220AB Insulated" mean for T1635T-8I?

A: The insulated variant includes an internal isolation layer between the mounting tab and the semiconductor die, providing electrical isolation between the tab and the circuit. This is useful in applications where the mounting tab must be isolated from the main circuit potential. Standard TO-220AB packages (non-insulated) have electrical continuity between the tab and the die.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1), matching the regulatory status of MAC16HCNG.

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