L6004D6TP TRIAC Equivalent & Substitute Parts

Part Overview

The L6004D6TP is a Logic - Sensitive Gate TRIAC manufactured by Littelfuse Inc., rated for 600 V off-state voltage and 4 A on-state current in a Surface Mount TO-252 (DPAK) package. This component is Active in product status and widely used in AC switching applications requiring low gate trigger requirements. Equivalent and substitute parts are identified based on matching electrical specifications, package compatibility, and operational parameters to ensure direct functional replacement in circuit designs.

Key Parameters

Parameter	L6004D6TP
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)	10 mA
Operating Temperature Range	-40°C ~ 110°C (TJ)
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the L6004D6TP are grouped based on the following critical parameters that determine functional equivalence:

Voltage - Off State: Must be 600 V
Current - On State (It (RMS)) (Max): Must be 4 A or higher
Package / Case: Must be TO-252-3, DPAK (2 Leads + Tab), SC-63
Mounting Type: Must be Surface Mount
Triac Type: Logic - Sensitive Gate preferred; Standard or Alternistor types acceptable with parameter verification
Gate Trigger Characteristics: Vgt (Max) 1.3 V, Igt (Max) 5-10 mA range
RoHS Compliance: ROHS3 Compliant required

Parts are classified into two categories:

Category A - Direct Equivalents (Littelfuse Manufacturer Recommended): MAC4DHMT4G, MAC4DLMT4G, MAC4DSMT4G. These maintain Logic - Sensitive Gate type with identical voltage and current ratings, differing only in gate trigger current specifications and packaging format (Tape & Reel).

Category B - Cross-Manufacturer Equivalents: SST136K-600D (SMC Diode Solutions), T405-600B, T405-600B-TR, T410-600B, T435-600B, T435-600B-TR (STMicroelectronics). These meet core electrical specifications with variations in Triac Type (Standard or Alternistor) and gate trigger parameters.

Category C - Higher Current Rating: T810-600B (STMicroelectronics). Rated for 8 A on-state current, suitable for applications requiring higher current capacity while maintaining 600 V voltage rating and DPAK package.

Parameter Comparison

Part Number	Manufacturer	Triac Type	Voltage - Off State	Current - On State (It (RMS)) (Max)	Vgt (Max)	Igt (Max)	Ih (Max)	Operating Temperature	Package	RoHS Status
L6004D6TP	Littelfuse Inc.	Logic - Sensitive Gate	600 V	4 A	1.3 V	5 mA	10 mA	-40°C ~ 110°C	TO-252 (DPAK)	ROHS3 Compliant
MAC4DHMT4G	Littelfuse	Logic - Sensitive Gate	600 V	4 A	1.3 V	5 mA	15 mA	-40°C ~ 110°C	TO-252 (DPAK)	ROHS3 Compliant
MAC4DLMT4G	Littelfuse Inc.	Logic - Sensitive Gate	600 V	4 A	1.3 V	3 mA	15 mA	-40°C ~ 110°C	TO-252 (DPAK)	ROHS3 Compliant
MAC4DSMT4G	Littelfuse Inc.	Logic - Sensitive Gate	600 V	4 A	1.3 V	10 mA	15 mA	-40°C ~ 125°C	TO-252 (DPAK)	ROHS3 Compliant
SST136K-600D	SMC Diode Solutions	Standard	600 V	4 A	1.3 V	10 mA	15 mA	-40°C ~ 125°C	DPAK	ROHS3 Compliant
T405-600B	STMicroelectronics	Logic - Sensitive Gate	600 V	4 A	1.3 V	5 mA	10 mA	-40°C ~ 125°C	TO-252 (DPAK)	ROHS3 Compliant
T405-600B-TR	STMicroelectronics	Logic - Sensitive Gate	600 V	4 A	1.3 V	5 mA	10 mA	-40°C ~ 125°C	TO-252 (DPAK)	ROHS3 Compliant
T410-600B	STMicroelectronics	Logic - Sensitive Gate	600 V	4 A	1.3 V	10 mA	15 mA	-40°C ~ 125°C	TO-252 (DPAK)	ROHS3 Compliant
T435-600B	STMicroelectronics	Alternistor - Snubberless	600 V	4 A	1.3 V	35 mA	35 mA	-40°C ~ 125°C	TO-252 (DPAK)	ROHS3 Compliant
T435-600B-TR	STMicroelectronics	Alternistor - Snubberless	600 V	4 A	1.3 V	35 mA	35 mA	-40°C ~ 125°C	TO-252 (DPAK)	ROHS3 Compliant
T810-600B	STMicroelectronics	Logic - Sensitive Gate	600 V	8 A	1.3 V	10 mA	15 mA	-40°C ~ 125°C	TO-252 (DPAK)	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications)

T405-600B and T405-600B-TR (STMicroelectronics) provide the closest electrical match to L6004D6TP, maintaining Logic - Sensitive Gate type, 4 A current rating, 5 mA gate trigger current, and 10 mA hold current. Both are ROHS3 Compliant and Active in product status. T405-600B-TR offers higher inventory availability (85,400 pcs) in Cut Tape & Digi-Reel packaging format.

For Littelfuse Ecosystem Continuity

MAC4DHMT4G and MAC4DLMT4G maintain Littelfuse manufacturer lineage with Logic - Sensitive Gate type and identical voltage/current ratings. MAC4DLMT4G features lower gate trigger current (3 mA) compared to the original 5 mA specification. Both are available in Tape & Reel packaging with substantial inventory levels (119,400 and 30,900 pcs respectively). MAC4DLMT4G carries REACH Affected status; verify compliance requirements for your application.

For Extended Temperature Range

MAC4DSMT4G, T410-600B, T435-600B, T435-600B-TR, and T810-600B support operating temperatures to 125°C, compared to L6004D6TP's 110°C maximum. Select these variants when thermal margin requirements exceed the original specification.

For Higher Current Capacity

T810-600B provides 8 A on-state current rating while maintaining 600 V voltage specification and DPAK package. Use this part when circuit design requires increased current handling beyond the original 4 A rating.

For Snubberless Applications

T435-600B and T435-600B-TR (Alternistor - Snubberless type) are suitable for applications where snubber circuits are not required. Note elevated gate trigger current (35 mA) and hold current (35 mA) specifications compared to Logic - Sensitive Gate variants.

For Cross-Manufacturer Sourcing

SST136K-600D (SMC Diode Solutions) meets core electrical specifications with Standard Triac type. REACH Affected status applies; verify regulatory compliance. Lower inventory (7,220 pcs) compared to other alternatives.

All substitute parts maintain ROHS3 Compliance, MSL 1 (Unlimited) moisture sensitivity, and Active product status, ensuring long-term availability and regulatory alignment.

Frequently Asked Questions (FAQ)

Q: Can MAC4DLMT4G replace L6004D6TP directly in my circuit?

A: Yes. MAC4DLMT4G maintains identical voltage (600 V) and current (4 A) ratings, Logic - Sensitive Gate type, and TO-252 DPAK package. The lower gate trigger current specification (3 mA vs. 5 mA) represents improved sensitivity and is functionally compatible. Verify REACH compliance requirements for your application, as MAC4DLMT4G carries REACH Affected status.

Q: What is the difference between Logic - Sensitive Gate and Alternistor - Snubberless types?

A: Logic - Sensitive Gate TRIACs (L6004D6TP, MAC4 series, T405, T410, T810) feature lower gate trigger current requirements (3-10 mA range) and lower hold current (10-15 mA), making them suitable for low-power gate drive circuits. Alternistor - Snubberless types (T435 series) have significantly higher gate trigger current (35 mA) and hold current (35 mA) specifications and are designed for applications where snubber circuits are eliminated. Select based on your gate drive circuit capability and snubber requirements.

Q: Is T810-600B compatible with L6004D6TP applications?

A: T810-600B is electrically compatible in terms of voltage (600 V), package (TO-252 DPAK), and gate trigger characteristics (10 mA). However, it is rated for 8 A on-state current versus the original 4 A. Use T810-600B only if your circuit design requires higher current capacity. If your application is designed for 4 A maximum, the higher rating introduces unnecessary thermal and reliability considerations.

Q: What packaging formats are available for substitutes?

A: L6004D6TP is supplied in Tube packaging. Littelfuse equivalents (MAC4DHMT4G, MAC4DLMT4G, MAC4DSMT4G) are supplied in Tape & Reel (TR) format. STMicroelectronics T405-600B is supplied in Tube; T405-600B-TR is supplied in Cut Tape & Digi-Reel format. T435-600B is supplied in Tube; T435-600B-TR is supplied in Cut Tape & Digi-Reel format. Verify packaging compatibility with your assembly process and procurement requirements.

Q: Are all substitute parts ROHS3 Compliant?

A: Yes. All listed substitute parts carry ROHS3 Compliance certification. MAC4DLMT4G additionally carries REACH Affected status; SST136K-600D carries REACH Affected status. Verify REACH compliance requirements for your specific application and end-use region.

Q: What is the inventory status of substitute parts?

A: T405-600B-TR offers the highest availability (85,400 pcs). MAC4DHMT4G provides 119,400 pcs. T435-600B-TR provides 31,100 pcs. MAC4DLMT4G provides 30,900 pcs. T810-600B provides 6,300 pcs. T405-600B provides 4,375 pcs. SST136K-600D provides 7,220 pcs. T410-600B provides 1,528 pcs. Confirm current inventory with your supplier for production planning.

Q: Can I use T405-600B-TR instead of T405-600B?

A: Yes. Both parts are electrically identical (Logic - Sensitive Gate, 600 V, 4 A, 5 mA gate trigger current, 10 mA hold current, -40°C ~ 125°C operating range, TO-252 DPAK package, ROHS3 Compliant). The difference is packaging format: T405-600B is supplied in Tube; T405-600B-TR is supplied in Cut Tape & Digi-Reel format. Select based on your assembly process requirements and inventory management preferences.

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