MAC4DHMT4 TRIAC Logic-Sensitive Gate 600V 4A Equivalent & Substitute Parts

Part Overview

The MAC4DHMT4 is a logic-sensitive gate TRIAC rated for 600V off-state voltage and 4A on-state current in a Surface Mount DPAK package. Manufactured by onsemi, this component is classified as obsolete product status. Due to its obsolete designation, identifying equivalent and substitute parts from active manufacturers is essential for ongoing design support, production continuity, and long-term component availability.

Key Parameters

Parameter	Value
Triac Type	Logic - Sensitive Gate
Voltage - Off State	600 V
Current - On State (It (RMS)) (Max)	4 A
Voltage - Gate Trigger (Vgt) (Max)	1.3 V
Current - Gate Trigger (Igt) (Max)	5 mA
Current - Hold (Ih) (Max)	15 mA
Current - Non Rep. Surge 50, 60Hz (Itsm)	40A @ 60Hz
Configuration	Single
Mounting Type	Surface Mount
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the MAC4DHMT4 is determined by strict alignment with the following critical parameters:

Triac Type: Logic - Sensitive Gate
Voltage - Off State: 600 V (exact match required)
Current - On State (It (RMS)) (Max): 4 A (exact match required)
Voltage - Gate Trigger (Vgt) (Max): 1.3 V maximum
Current - Gate Trigger (Igt) (Max): 5 mA maximum
Current - Hold (Ih) (Max): 15 mA maximum
Package / Case: TO-252-3, DPAK (2 Leads + Tab), SC-63
Mounting Type: Surface Mount

Substitute parts must meet or exceed these specifications without exceeding the maximum ratings. Parts are grouped by manufacturer and product status to facilitate selection based on availability and compliance requirements.

Parameter Comparison

Parameter	MAC4DHMT4 (onsemi)	MAC4DHMT4G (Littelfuse)	BT136S-600D,118 (WeEn)
Triac Type	Logic - Sensitive Gate	Logic - Sensitive Gate	Logic - Sensitive Gate
Voltage - Off State	600 V	600 V	600 V
Current - On State (It (RMS)) (Max)	4 A	4 A	4 A
Voltage - Gate Trigger (Vgt) (Max)	1.3 V	1.3 V	1.5 V
Current - Gate Trigger (Igt) (Max)	5 mA	5 mA	5 mA
Current - Hold (Ih) (Max)	15 mA	15 mA	10 mA
Current - Non Rep. Surge 50, 60Hz (Itsm)	40A @ 60Hz	40A @ 60Hz	25A, 27A
Package / Case	TO-252-3, DPAK	TO-252-3, DPAK	TO-252-3, DPAK
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

MAC4DHMT4G (Littelfuse) is the primary substitute for MAC4DHMT4. This part maintains identical electrical specifications across all critical parameters: 600V off-state voltage, 4A on-state current, 1.3V maximum gate trigger voltage, and 40A non-repetitive surge current. The part is in active product status with ROHS3 compliance and unlimited moisture sensitivity level. Packaging and mounting type are identical. This part provides direct functional equivalence with improved long-term availability and regulatory compliance.

BT136S-600D,118 (WeEn Semiconductors) is a secondary substitute option. While it matches the core voltage and current ratings (600V, 4A), it exhibits higher gate trigger voltage (1.5V versus 1.3V maximum) and lower non-repetitive surge current (25A/27A versus 40A). The hold current is also lower at 10mA maximum. This part is active and ROHS3 compliant. Selection of this part requires verification that the higher gate trigger voltage and reduced surge current rating are acceptable for the specific application circuit.

Both substitute parts are available in active product status, providing superior long-term supply chain stability compared to the obsolete MAC4DHMT4.

Frequently Asked Questions (FAQ)

Q: Can MAC4DHMT4G directly replace MAC4DHMT4 without circuit modification?

A: Yes. MAC4DHMT4G maintains identical electrical specifications for voltage, current, gate trigger parameters, and surge rating. The DPAK package and Surface Mount configuration are identical. No circuit modification is required.

Q: What are the key differences between MAC4DHMT4G and BT136S-600D,118?

A: Both parts share the same 600V voltage and 4A current ratings. MAC4DHMT4G has a 1.3V maximum gate trigger voltage and 40A surge rating. BT136S-600D,118 has a 1.5V maximum gate trigger voltage and 25A/27A surge rating. The higher gate trigger voltage of the WeEn part may affect circuit sensitivity. The reduced surge rating may impact transient protection capability.

Q: Are there packaging or mounting differences between these substitutes?

A: All three parts use identical Surface Mount DPAK packaging (TO-252-3, DPAK with 2 Leads + Tab, SC-63). No PCB layout or assembly process changes are required.

Q: What is the impact of RoHS compliance differences?

A: MAC4DHMT4 is RoHS non-compliant. Both MAC4DHMT4G and BT136S-600D,118 are ROHS3 compliant. If your design or supply chain requires RoHS compliance, the substitute parts satisfy this requirement. If legacy non-compliant parts are acceptable, this is not a limiting factor.

Q: Which substitute part should be selected for new designs?

A: MAC4DHMT4G is recommended for new designs. It provides identical electrical performance to the original part with active product status and ROHS3 compliance. BT136S-600D,118 is suitable only if the higher gate trigger voltage and reduced surge rating are verified as acceptable for the specific application.

Q: What is the moisture sensitivity level for these parts?

A: All three parts have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

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