MAC15A10 TRIAC 800V 15A Equivalent & Substitute Parts

Part Overview

The MAC15A10 is a standard TRIAC thyristor rated for 800V off-state voltage and 15A on-state current in a TO-220AB through-hole package. Manufactured by onsemi, this component is classified as obsolete. Due to its obsolete status and limited availability from the original manufacturer, identifying equivalent and substitute parts is necessary for design continuity and procurement flexibility. Substitute parts must maintain electrical compatibility within the specified parameter ranges while meeting current manufacturing and compliance standards.

Key Parameters

Parameter	Value	Unit
Voltage - Off State	800	V
Current - On State (It (RMS)) (Max)	15	A
Voltage - Gate Trigger (Vgt) (Max)	2	V
Current - Non Rep. Surge 50, 60Hz (Itsm)	150	A @ 60Hz
Current - Gate Trigger (Igt) (Max)	50	mA
Current - Hold (Ih) (Max)	40	mA
Operating Temperature	-40 to 125	°C (TJ)
Package / Case	TO-220-3	-
Mounting Type	Through Hole	-

Substitute Part Grouping Explanation

Substitution eligibility for the MAC15A10 is determined by the following criteria:

Direct Equivalent Category: Parts must match all critical electrical parameters: 800V off-state voltage, 15A on-state current rating, TO-220-3 package, through-hole mounting, and compatible gate trigger characteristics (Vgt ≤ 2V, Igt ≤ 50mA).

Similar/Compatible Category: Parts may exceed the on-state current rating (16A instead of 15A) while maintaining 800V voltage rating, TO-220-3 package, and through-hole mounting. Gate trigger parameters may vary within acceptable ranges for circuit operation. These parts provide functional compatibility with potential performance improvements.

The MAC15A10G qualifies as a direct equivalent. The BT139-800,127 and BTB16-800BRG qualify as similar/compatible substitutes due to higher current ratings and improved gate trigger characteristics.

Parameter Comparison

Parameter	MAC15A10 (onsemi)	MAC15A10G (Littelfuse)	BT139-800,127 (WeEn)	BTB16-800BRG (STMicroelectronics)
Voltage - Off State (V)	800	800	800	800
Current - On State (It (RMS)) (Max) (A)	15	15	16	16
Voltage - Gate Trigger (Vgt) (Max) (V)	2	2	1.5	1.3
Current - Non Rep. Surge 50, 60Hz (Itsm) (A)	150 @ 60Hz	150 @ 60Hz	155, 170	160, 168
Current - Gate Trigger (Igt) (Max) (mA)	50	50	35	50
Current - Hold (Ih) (Max) (mA)	40	40	45	50
Operating Temperature (°C)	-40 to 125	-40 to 125	125	-40 to 125
Package / Case	TO-220-3	TO-220-3	TO-220-3	TO-220-3
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Product Status	Obsolete	Active	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

MAC15A10G (Littelfuse Inc.): This part is the preferred direct equivalent. It maintains identical electrical specifications to the MAC15A10 while offering active product status and ROHS3 compliance. The MAC15A10G is suitable for direct replacement in existing designs without circuit modification.

BT139-800,127 (WeEn Semiconductors): This part provides a compatible substitute with 16A on-state current capability and lower gate trigger voltage (1.5V). The improved surge current rating (155A, 170A) and reduced gate trigger current (35mA) offer enhanced performance margins. Operating temperature is limited to 125°C maximum. ROHS3 compliance is confirmed.

BTB16-800BRG (STMicroelectronics): This part provides a compatible substitute with 16A on-state current capability and the lowest gate trigger voltage (1.3V) among available options. The full operating temperature range (-40°C to 125°C) matches the original specification. ROHS3 compliance is confirmed.

Selection between substitute parts should be based on procurement availability, cost considerations, and specific circuit requirements regarding gate trigger sensitivity and temperature operating range.

Frequently Asked Questions (FAQ)

Q: Can MAC15A10G be used as a direct replacement for MAC15A10? A: Yes. The MAC15A10G maintains identical electrical specifications and package configuration. No circuit modifications are required.

Q: What is the difference between direct equivalent and similar substitute parts? A: Direct equivalents (MAC15A10G) match all electrical parameters exactly. Similar substitutes (BT139-800,127, BTB16-800BRG) have higher current ratings and may have different gate trigger characteristics, but remain functionally compatible within the 800V, TO-220-3 package category.

Q: Are the BT139-800,127 and BTB16-800BRG interchangeable with MAC15A10? A: Both parts are functionally compatible substitutes. The 16A current rating provides additional margin over the 15A requirement. Gate trigger voltages are lower, which may affect circuit timing characteristics. Verification in the specific application circuit is recommended.

Q: What is the impact of lower gate trigger voltage in substitute parts? A: Lower Vgt values (1.5V for BT139-800,127 and 1.3V for BTB16-800BRG versus 2V for MAC15A10) mean the TRIAC requires less gate voltage to trigger. This may affect gate drive circuit design and timing behavior in sensitive applications.

Q: Are all substitute parts RoHS compliant? A: Yes. MAC15A10G, BT139-800,127, and BTB16-800BRG are all ROHS3 compliant. The original MAC15A10 is RoHS non-compliant.

Q: Does operating temperature range affect part selection? A: The BT139-800,127 is rated to 125°C maximum only, without a lower temperature specification. MAC15A10, MAC15A10G, and BTB16-800BRG all support -40°C to 125°C. For applications requiring full temperature range operation, BTB16-800BRG is the preferred substitute.

Q: What packaging formats are available for these parts? A: MAC15A10G is supplied in Box packaging. BT139-800,127 and BTB16-800BRG are supplied in Tube packaging. All use TO-220AB or TO-220 through-hole package configuration.

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