Littelfuse L4004D6RP TRIAC Equivalent & Substitute Parts

Part Overview

The Littelfuse L4004D6RP is a Logic-Sensitive Gate TRIAC rated for 400 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 and control applications requiring sensitive gate triggering. Equivalent and substitute parts are identified based on matching electrical characteristics, package compatibility, and operational parameters that define functional interchangeability within the 400 V to 600 V TRIAC category.

Key Parameters

Parameter	Value
Triac Type	Logic - Sensitive Gate
Voltage - Off State	400 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	-40°C ~ 110°C (TJ)
Mounting Type	Surface Mount
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution logic for the L4004D6RP is based on the following criteria:

Parametric Equivalent Category: Parts matching all critical electrical parameters including 400 V off-state voltage, 4 A on-state current, Logic-Sensitive Gate configuration, and identical package type (TO-252 DPAK).

Manufacturer Recommended Category: Parts with higher voltage ratings (600 V) and compatible current ratings (4 A) that maintain the same package footprint and gate trigger characteristics. These parts operate within the same application envelope but provide enhanced voltage margin.

Key Parameters Determining Substitution:

Triac Type: Logic - Sensitive Gate
Current - On State (It (RMS)) (Max): 4 A
Package / Case: TO-252-3, DPAK
Mounting Type: Surface Mount
Gate Trigger Voltage (Vgt) and Current (Igt) compatibility

Parameter Comparison

Parameter	L4004D6RP (Main)	L4004D5RP (Parametric Equivalent)	BT136S-600D,118 (MFR Recommended)	T410-600B (MFR Recommended)
Manufacturer	Littelfuse	Littelfuse Inc.	WeEn Semiconductors	STMicroelectronics
Triac Type	Logic - Sensitive Gate	Logic - Sensitive Gate	Logic - Sensitive Gate	Logic - Sensitive Gate
Voltage - Off State	400 V	400 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	1.5 V	1.3 V
Current - Gate Trigger (Igt) (Max)	5 mA	5 mA	5 mA	10 mA
Current - Hold (Ih) (Max)	10 mA	10 mA	10 mA	15 mA
Operating Temperature	-40°C ~ 110°C (TJ)	-40°C ~ 110°C (TJ)	125°C (TJ)	-40°C ~ 125°C (TJ)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	TO-252-3, DPAK	TO-252-3, DPAK	TO-252-3, DPAK	TO-252-3, DPAK
Packaging	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)	Tube
Product Status	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

L4004D5RP (Littelfuse Inc.): Direct parametric equivalent with identical electrical specifications and operating temperature range. Recommended for direct replacement where 400 V rating is specified and component availability is a consideration. Both parts are Active status, ROHS3 compliant, and carry MSL 1 rating.

BT136S-600D,118 (WeEn Semiconductors): Suitable for applications where 600 V off-state voltage provides additional design margin over the 400 V specification. Gate trigger voltage is 1.5 V (versus 1.3 V), which remains within acceptable sensitive gate parameters. Maximum junction temperature is 125°C. REACH Status is Affected. Packaging is Tape & Reel (TR).

T410-600B (STMicroelectronics): Suitable for applications requiring 600 V off-state voltage with extended operating temperature range (-40°C to 125°C). Gate trigger current (Igt) is 10 mA and hold current (Ih) is 15 mA, both higher than the main part. Packaging is Tube format. REACH Status is Unaffected.

All substitute parts maintain Surface Mount DPAK package compatibility and are Active in product status.

Frequently Asked Questions (FAQ)

Q: Can L4004D5RP be used as a direct replacement for L4004D6RP?

A: Yes. L4004D5RP is a parametric equivalent with identical voltage, current, gate trigger, and operating temperature specifications. Both are Littelfuse products in DPAK package with ROHS3 compliance and MSL 1 rating.

Q: What is the difference between the 400 V and 600 V rated parts?

A: The main part (L4004D6RP) is rated for 400 V off-state voltage. The BT136S-600D,118 and T410-600B are rated for 600 V off-state voltage. The 600 V parts provide higher voltage margin and are suitable for applications where the circuit voltage may exceed 400 V or where additional safety margin is required.

Q: Are the 600 V parts pin-compatible with the L4004D6RP?

A: Yes. All parts use the TO-252-3 DPAK package with identical pin configuration (2 Leads + Tab). They are mechanically and electrically compatible for PCB layout purposes.

Q: What are the differences in gate trigger specifications?

A: L4004D6RP and L4004D5RP both have Vgt (Max) of 1.3 V and Igt (Max) of 5 mA. BT136S-600D,118 has Vgt (Max) of 1.5 V and Igt (Max) of 5 mA. T410-600B has Vgt (Max) of 1.3 V but Igt (Max) of 10 mA. These variations remain within the Logic-Sensitive Gate classification.

Q: What is the difference in packaging between the substitute parts?

A: L4004D6RP, L4004D5RP, and BT136S-600D,118 are supplied in Tape & Reel (TR) format. T410-600B is supplied in Tube format. Both formats are standard for surface mount components; selection depends on assembly process requirements.

Q: Are all parts ROHS3 compliant?

A: Yes. L4004D6RP, L4004D5RP, BT136S-600D,118, and T410-600B are all ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.

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