MAC4DLM-1G Equivalent & Substitute Parts

Part Overview

The MAC4DLM-1G is a Logic - Sensitive Gate TRIAC manufactured by Littelfuse, rated for 600 V off-state voltage and 4 A on-state current in a Through Hole TO-251-3 package. This component is Active in product status and ROHS3 compliant. Equivalent and substitute parts are identified when applications require alternative packaging formats, different gate trigger characteristics, or sourcing from alternative manufacturers while maintaining core electrical performance within specified parameters.

Key Parameters

Parameter	Value
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)	3 mA
Current - Hold (Ih) (Max)	15 mA
Operating Temperature Range	-40°C ~ 110°C (TJ)
Mounting Type	Through Hole
Package / Case	TO-251-3 Short Leads, IPak, TO-251AA
Triac Type	Logic - Sensitive Gate

Substitute Part Grouping Explanation

Substitution eligibility is determined by matching the following core electrical parameters: off-state voltage (600 V), on-state current rating (4 A maximum), gate trigger voltage (1.3 V maximum), and through-hole mounting configuration. Substitute parts must maintain compatibility with TO-251 package variants (TO-251-3, TO-251AA, or TO-251 IPAK) to ensure mechanical fit in existing PCB layouts.

The identified substitutes fall into two categories:

Category 1: Littelfuse Logic - Sensitive Gate TRIACs (L6004V5TP, L6004V3TP) — These parts maintain identical off-state voltage, on-state current, and gate trigger voltage specifications. Differences in gate trigger current (Igt) and hold current (Ih) are within acceptable operational ranges for logic-level gate drive applications. Packaging variants (Tube vs. Box) and supplier device packages (TO-251 V-Pak/I-Pak vs. TO-251AA) do not affect electrical substitutability.

Category 2: STMicroelectronics Alternistor - Snubberless TRIAC (T435-600H) — This part matches the 600 V, 4 A, and 1.3 V gate trigger specifications. The Alternistor topology represents a different TRIAC architecture (Snubberless vs. Logic - Sensitive Gate) with higher gate trigger current (35 mA) and hold current (35 mA). This part is substitutable where the application can accommodate higher gate drive requirements and extended operating temperature range (-40°C ~ 125°C).

Parameter Comparison

Parameter	MAC4DLM-1G	L6004V5TP	L6004V3TP	T435-600H
Manufacturer	Littelfuse	Littelfuse Inc.	Littelfuse Inc.	STMicroelectronics
Triac Type	Logic - Sensitive Gate	Logic - Sensitive Gate	Logic - Sensitive Gate	Alternistor - Snubberless
Voltage - Off State	600 V	600 V	600 V	600 V
Current - On State (It (RMS)) (Max)	4 A	4 A	4 A	4 A
Voltage - Gate Trigger (Vgt) (Max)	1.3 V	1.3 V	1.3 V	1.3 V
Current - Gate Trigger (Igt) (Max)	3 mA	5 mA	3 mA	35 mA
Current - Hold (Ih) (Max)	15 mA	10 mA	5 mA	35 mA
Operating Temperature Range	-40°C ~ 110°C (TJ)	-40°C ~ 110°C (TJ)	-40°C ~ 110°C (TJ)	-40°C ~ 125°C (TJ)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	TO-251-3 Short Leads, IPak, TO-251AA	TO-251-3 Short Leads, IPak, TO-251AA	TO-251-3 Short Leads, IPak, TO-251AA	TO-251-3 Short Leads, IPak, TO-251AA
Packaging Format	Box	Tube	Tube	Tube
Product Status	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

All identified substitute parts maintain Active product status and ROHS3 compliance, ensuring long-term availability and regulatory alignment with the MAC4DLM-1G.

L6004V5TP and L6004V3TP are direct functional equivalents from the same manufacturer. Selection between these Littelfuse options and the MAC4DLM-1G depends on packaging requirements (Tube vs. Box) and specific gate drive current tolerance. L6004V3TP matches the original gate trigger current specification (3 mA), while L6004V5TP permits slightly higher gate current (5 mA). Both maintain identical voltage and current ratings.

T435-600H provides substitutability for applications requiring extended temperature operation (up to 125°C junction temperature vs. 110°C for the MAC4DLM-1G). The Alternistor architecture requires higher gate drive current (35 mA vs. 3 mA), necessitating circuit design verification to confirm gate driver capability. This part is suitable where thermal performance or temperature range requirements exceed the Logic - Sensitive Gate topology.

Frequently Asked Questions (FAQ)

Q: Can L6004V5TP directly replace MAC4DLM-1G in existing designs?

A: Yes. Both parts share identical 600 V off-state voltage, 4 A on-state current, and 1.3 V gate trigger voltage. The 5 mA gate trigger current of L6004V5TP is within acceptable operational range for logic-level gate drive circuits. Packaging format differs (Tube vs. Box), but electrical performance is equivalent.

Q: What is the difference between L6004V3TP and L6004V5TP?

A: Both are Littelfuse Logic - Sensitive Gate TRIACs with identical voltage and current ratings. L6004V3TP specifies 3 mA maximum gate trigger current (matching MAC4DLM-1G), while L6004V5TP specifies 5 mA. Hold current also differs (5 mA vs. 10 mA). Selection depends on gate driver output capability and circuit sensitivity to gate current variations.

Q: Is T435-600H compatible with MAC4DLM-1G applications?

A: T435-600H matches the 600 V, 4 A, and 1.3 V specifications, enabling mechanical and electrical substitution. However, the Alternistor topology requires 35 mA gate trigger current versus 3 mA for the MAC4DLM-1G. Gate driver circuits must be verified to supply this higher current. The extended temperature range (-40°C to 125°C) provides additional thermal margin if required.

Q: Do all substitute parts fit the same PCB footprint?

A: All parts use Through Hole TO-251 package variants (TO-251-3, TO-251AA, or TO-251 IPAK). Physical lead spacing and mounting hole positions are compatible across these variants, enabling direct PCB substitution without layout modification.

Q: Are there inventory or lead time considerations for these substitutes?

A: All parts are listed as Active with current stock availability. Packaging format (Box vs. Tube) may affect procurement timelines. Consult supplier inventory for specific delivery requirements.

Q: What compliance certifications apply to all substitute parts?

A: All parts are ROHS3 compliant and REACH unaffected, maintaining regulatory alignment with the MAC4DLM-1G for applications subject to these standards.

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