MAC8SN TRIAC Equivalent & Substitute Parts

Part Overview

The MAC8SN is a logic-sensitive gate TRIAC manufactured by onsemi, rated for 800 V off-state voltage and 8 A on-state current in a TO-220-3 through-hole package. This component is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. Substitute parts must maintain electrical compatibility across voltage, current, and gate trigger specifications while accommodating packaging and compliance requirements.

Key Parameters

Parameter	Value
Voltage - Off State	800 V
Current - On State (It (RMS)) (Max)	8 A
Voltage - Gate Trigger (Vgt) (Max)	1.5 V
Current - Gate Trigger (Igt) (Max)	5 mA
Current - Hold (Ih) (Max)	10 mA
Operating Temperature	-40°C ~ 125°C (TJ)
Mounting Type	Through Hole
Package / Case	TO-220-3

Substitute Part Grouping Explanation

Substitution for the MAC8SN is determined by the following criteria:

Direct Electrical Equivalence (Full Substitutes):

Voltage - Off State: 800 V (required)
Current - On State: 8 A (required)
Voltage - Gate Trigger (Vgt) (Max): ≤ 1.5 V (required)
Current - Gate Trigger (Igt) (Max): ≤ 5 mA (required)
Current - Hold (Ih) (Max): ≤ 10 mA (required)
Operating Temperature: -40°C ~ 125°C (required)
Package / Case: TO-220-3 (required)
Mounting Type: Through Hole (required)

Partial Substitutes (Current Rating Reduction):

Parts rated at 6 A on-state current with 800 V off-state voltage are suitable for applications where the 8 A rating is not fully utilized, provided all other parameters remain within specification.

The MAC8SNG (Littelfuse) qualifies as a direct equivalent. The BTA06-800TWRG, BTB06-800TWRG, and BTB08-800TWRG (STMicroelectronics) are classified as similar substitutes with variations in current rating and gate trigger voltage.

Parameter Comparison

Parameter	MAC8SN (onsemi)	MAC8SNG (Littelfuse)	BTA06-800TWRG (STMicroelectronics)	BTB06-800TWRG (STMicroelectronics)	BTB08-800TWRG (STMicroelectronics)
Voltage - Off State	800 V	800 V	800 V	800 V	800 V
Current - On State (It (RMS)) (Max)	8 A	8 A	6 A	6 A	8 A
Voltage - Gate Trigger (Vgt) (Max)	1.5 V	1.5 V	1.3 V	1.3 V	1.3 V
Current - Gate Trigger (Igt) (Max)	5 mA	5 mA	5 mA	5 mA	5 mA
Current - Hold (Ih) (Max)	10 mA	10 mA	10 mA	10 mA	10 mA
Operating Temperature	-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
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

MAC8SNG (Littelfuse) is the primary direct substitute for MAC8SN. It maintains identical electrical specifications and operating temperature range while offering active product status and ROHS3 compliance. The TO-220AB package variant is mechanically compatible with TO-220-3 applications.

BTB08-800TWRG (STMicroelectronics) provides an alternative direct electrical equivalent with 8 A on-state current rating and active product status. The gate trigger voltage specification (1.3 V max) is superior to the original MAC8SN (1.5 V max), ensuring more sensitive gate operation. ROHS3 compliance is provided.

BTA06-800TWRG and BTB06-800TWRG (STMicroelectronics) are suitable substitutes only for applications where the on-state current requirement does not exceed 6 A. Both parts maintain 800 V off-state voltage, identical gate trigger current, hold current, and operating temperature specifications. Both offer active product status and ROHS3 compliance.

For new designs requiring RoHS compliance and active product support, MAC8SNG or BTB08-800TWRG are recommended. For applications with reduced current requirements (≤ 6 A), BTA06-800TWRG or BTB06-800TWRG provide cost-effective alternatives.

Frequently Asked Questions (FAQ)

Q: Can MAC8SNG directly replace MAC8SN in existing designs? A: Yes. MAC8SNG maintains identical electrical specifications (800 V, 8 A, 1.5 V gate trigger, 5 mA gate trigger current, 10 mA hold current) and operating temperature range (-40°C to 125°C). The TO-220AB package is mechanically compatible with TO-220-3 footprints.

Q: What is the difference between BTB08-800TWRG and MAC8SN? A: BTB08-800TWRG matches the 8 A on-state current and 800 V off-state voltage of MAC8SN. The gate trigger voltage is 1.3 V (lower than MAC8SN's 1.5 V), providing more sensitive gate operation. All other parameters are equivalent.

Q: Can BTA06-800TWRG or BTB06-800TWRG replace MAC8SN? A: These parts are suitable only if the application does not require the full 8 A on-state current rating. Both are rated for 6 A maximum on-state current. All other electrical parameters (800 V off-state, gate specifications, operating temperature) remain compatible.

Q: Why is MAC8SN marked as obsolete? A: MAC8SN is no longer manufactured by onsemi. Active alternatives from Littelfuse (MAC8SNG) and STMicroelectronics (BTB08-800TWRG) provide equivalent or superior specifications with ongoing production support.

Q: Are all substitute parts RoHS compliant? A: MAC8SN is RoHS non-compliant. All listed substitutes (MAC8SNG, BTA06-800TWRG, BTB06-800TWRG, BTB08-800TWRG) are ROHS3 compliant, meeting current environmental regulations.

Q: What is the difference between TO-220 and TO-220AB packaging? A: Both are through-hole TO-220 variants with identical pin configurations and mechanical footprints. TO-220AB is a Littelfuse designation for the same package type. No design changes are required for substitution.

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