MAC4DCNT4 TRIAC 800V 4A Equivalent & Substitute Parts

Part Overview

The MAC4DCNT4 is a standard TRIAC rated for 800V off-state voltage and 4A on-state current in a surface mount DPAK package. Manufactured by onsemi, this component is classified as obsolete. Due to its obsolete status, equivalent and substitute parts from active manufacturers are necessary for new designs and ongoing production requirements. Substitute parts maintain the same voltage and current ratings while offering improved availability and compliance with current regulatory standards.

Key Parameters

Parameter	Value
Voltage - Off State	800 V
Current - On State (It (RMS)) (Max)	4 A
Voltage - Gate Trigger (Vgt) (Max)	1.3 V
Current - Gate Trigger (Igt) (Max)	35 mA
Current - Hold (Ih) (Max)	35 mA
Current - Non Rep. Surge 50, 60Hz (Itsm)	40A @ 60Hz
Operating Temperature Range	-40°C ~ 125°C (TJ)
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63
Mounting Type	Surface Mount
Configuration	Single

Substitute Part Grouping Explanation

Substitution for the MAC4DCNT4 is determined by the following critical parameters:

Voltage - Off State: Must be 800V
Current - On State (It (RMS)) (Max): Must be 4A or greater
Voltage - Gate Trigger (Vgt) (Max): Must not exceed 1.3V
Current - Gate Trigger (Igt) (Max): Must not exceed 35mA
Current - Hold (Ih) (Max): Must not exceed 35mA
Package / Case: Must be TO-252-3, DPAK (2 Leads + Tab), SC-63
Mounting Type: Must be Surface Mount

Substitute parts are grouped into two categories:

Direct Equivalent: MAC4DCNT4G (Littelfuse Inc.) — identical electrical specifications with active product status and improved compliance.

Functional Equivalents: Parts with 800V rating and equal or higher current capacity (4A or greater), matching gate trigger and hold current specifications, in the same DPAK package. These include standard TRIACs and Alternistor (snubberless) variants.

Parameter Comparison

Part Number	Manufacturer	Triac Type	Voltage - Off State	Current - On State (It (RMS)) (Max)	Voltage - Gate Trigger (Vgt) (Max)	Current - Gate Trigger (Igt) (Max)	Current - Hold (Ih) (Max)	Current - Non Rep. Surge 50, 60Hz (Itsm)	Operating Temperature	Package	Product Status	RoHS Status
MAC4DCNT4	onsemi	Standard	800 V	4 A	1.3 V	35 mA	35 mA	40A @ 60Hz	-40°C ~ 125°C	TO-252-3, DPAK	Obsolete	RoHS non-compliant
MAC4DCNT4G	Littelfuse Inc.	Standard	800 V	4 A	1.3 V	35 mA	35 mA	40A @ 60Hz	-40°C ~ 125°C	TO-252-3, DPAK	Active	ROHS3 Compliant
T435-800B-TR	STMicroelectronics	Alternistor - Snubberless	800 V	4 A	1.3 V	35 mA	35 mA	30A, 31A	-40°C ~ 125°C	TO-252-3, DPAK	Active	ROHS3 Compliant
Q8006DH4RP	Littelfuse Inc.	Alternistor - Snubberless	800 V	6 A	1.3 V	35 mA	35 mA	55A, 65A	-40°C ~ 125°C	TO-252-3, DPAK	Active	ROHS3 Compliant
Q8006DH4TP	Littelfuse Inc.	Alternistor - Snubberless	800 V	6 A	1.3 V	35 mA	35 mA	55A, 65A	-40°C ~ 125°C	TO-252-3, DPAK	Active	ROHS3 Compliant
Q8008DH4RP	Littelfuse Inc.	Alternistor - Snubberless	800 V	8 A	1.3 V	35 mA	35 mA	80A, 85A	-40°C ~ 125°C	TO-252-3, DPAK	Active	ROHS3 Compliant
Q8008DH4TP	Littelfuse Inc.	Alternistor - Snubberless	800 V	8 A	1.3 V	35 mA	35 mA	80A, 85A	-40°C ~ 125°C	TO-252-3, DPAK	Active	ROHS3 Compliant
T835-800B	STMicroelectronics	Alternistor - Snubberless	800 V	8 A	1.3 V	50 mA	50 mA	80A, 84A	-40°C ~ 125°C	TO-252-3, DPAK	Active	ROHS3 Compliant
T835-800B-TR	STMicroelectronics	Alternistor - Snubberless	800 V	8 A	1.3 V	35 mA	35 mA	80A, 84A	-40°C ~ 125°C	TO-252-3, DPAK	Active	ROHS3 Compliant
ACST210-8B	STMicroelectronics	Logic - Sensitive Gate	800 V	2 A	1.1 V	10 mA	10 mA	8A, 8.4A	-40°C ~ 125°C	TO-252-3, DPAK	Active	ROHS3 Compliant
BCR3AS-14B-T13#B00	Renesas Electronics Corporation	Standard	800 V	3 A	1.5 V	30 mA	Not specified	30A @ 60Hz	-40°C ~ 150°C	TO-252-3, DPAK	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: MAC4DCNT4G (Littelfuse Inc.) is the direct equivalent with identical electrical specifications. This part is active, ROHS3 compliant, and maintains full compatibility with the original MAC4DCNT4 design. It is available in Tape & Reel packaging with 40,600 units in stock.

Secondary Recommendations for Higher Current Applications: T435-800B-TR (STMicroelectronics) and Q8006DH4RP/Q8006DH4TP (Littelfuse Inc.) provide 4A and 6A ratings respectively, both with 800V off-state voltage and matching gate trigger specifications. These Alternistor variants offer snubberless operation and are ROHS3 compliant.

Higher Current Alternatives: Q8008DH4RP, Q8008DH4TP, T835-800B, and T835-800B-TR provide 8A current ratings with 800V voltage rating. T835-800B-TR is available in high volume (28,300 units) and maintains the 35mA gate trigger and hold current specifications matching the original part.

Not Recommended for Direct Substitution: ACST210-8B (STMicroelectronics) has a 2A current rating, below the 4A requirement. BCR3AS-14B-T13#B00 (Renesas Electronics Corporation) has a 3A rating and 1.5V gate trigger voltage, exceeding the 1.3V maximum specification.

Frequently Asked Questions (FAQ)

Q: Can MAC4DCNT4G be used as a direct replacement for MAC4DCNT4?

A: Yes. MAC4DCNT4G is electrically and mechanically identical to MAC4DCNT4, with the same 800V voltage rating, 4A current rating, gate trigger specifications, and TO-252-3 DPAK package. The primary difference is active product status and ROHS3 compliance.

Q: What is the difference between standard TRIAC and Alternistor (snubberless) variants?

A: Standard TRIACs require external snubber circuits for EMI suppression. Alternistor variants incorporate integrated snubberless technology, reducing external component requirements. Both types maintain the same voltage and current ratings specified for substitution.

Q: Can I use a higher current rated TRIAC as a substitute?

A: Yes, if all other electrical parameters are met. Parts rated for 6A or 8A on-state current can replace the 4A MAC4DCNT4, provided the 800V voltage rating, gate trigger voltage (1.3V maximum), and gate trigger current (35mA maximum) specifications are maintained. The TO-252-3 DPAK package must remain unchanged.

Q: What packaging options are available for substitute parts?

A: Substitute parts are available in Tape & Reel (TR), Tube, and Cut Tape (CT) & Digi-Reel® packaging. Selection depends on production volume and assembly requirements. Tape & Reel packaging is standard for high-volume automated assembly.

Q: Are all substitute parts ROHS3 compliant?

A: All recommended substitute parts are ROHS3 compliant. The original MAC4DCNT4 is RoHS non-compliant. Compliance with current environmental regulations is a key advantage of transitioning to active substitute parts.

Q: What is the operating temperature range for substitute parts?

A: All substitute parts operate within -40°C to 125°C (TJ), matching the original MAC4DCNT4 specification. BCR3AS-14B-T13#B00 extends to -40°C to 150°C, providing additional thermal margin if required.

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