L2004D5RP TRIAC Equivalent & Substitute Parts

Part Overview

The L2004D5RP is a Logic-Sensitive Gate TRIAC manufactured by Littelfuse Inc., rated for 200V off-state voltage and 4A on-state current in a Surface Mount TO-252 (DPAK) package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

The L2004D5RP serves as a general-purpose thyristor for AC switching applications requiring sensitive gate triggering. Substitution is driven by product lifecycle status and the need for active inventory availability.

Key Parameters

Parameter	Value
Voltage - Off State	200 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)
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

Substitution of the L2004D5RP is determined by the following criteria:

Mandatory Compatibility Parameters:

Triac Type: Logic - Sensitive Gate
Package / Case: TO-252-3, DPAK (2 Leads + Tab), SC-63
Mounting Type: Surface Mount
Configuration: Single
Current - On State (It (RMS)) (Max): 4 A
Voltage - Gate Trigger (Vgt) (Max): 1.3 V or lower
Current - Gate Trigger (Igt) (Max): 5 mA or lower
Current - Hold (Ih) (Max): 10 mA or lower
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Voltage Rating Consideration: The L2004D5RP operates at 200V off-state voltage. Substitute parts may operate at equal or higher voltage ratings (400V, 600V) without functional degradation in circuits designed for 200V operation. Higher voltage ratings provide design margin and are electrically compatible.

Parameter Comparison

Parameter	L2004D5RP	L4004D5RP	L6004D5RP	BT136S-600D,118	T405Q-600B-TR
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.	WeEn Semiconductors	STMicroelectronics
Voltage - Off State	200 V	400 V	600 V	600 V	600 V
Current - On State (It (RMS)) (Max)	4 A	4 A	4 A	4 A	4 A
Voltage - Gate Trigger (Vgt) (Max)	1.3 V	1.3 V	1.3 V	1.5 V	1.3 V
Current - Gate Trigger (Igt) (Max)	5 mA	5 mA	5 mA	5 mA	5 mA
Current - Hold (Ih) (Max)	10 mA	10 mA	10 mA	10 mA	10 mA
Operating Temperature	-40°C ~ 110°C	-40°C ~ 110°C	-40°C ~ 110°C	125°C (TJ)	-40°C ~ 125°C
Package / Case	TO-252-3, DPAK	TO-252-3, DPAK	TO-252-3, DPAK	TO-252-3, DPAK	TO-252-3, DPAK
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitute - Littelfuse Series: L4004D5RP and L6004D5RP are direct Littelfuse equivalents with identical gate trigger characteristics (Vgt 1.3V max) and hold current specifications. Both are active products with established supply chains. L4004D5RP provides 400V rating; L6004D5RP provides 600V rating. Selection between these depends on circuit voltage requirements.

Alternative Manufacturers: BT136S-600D,118 (WeEn Semiconductors) and T405Q-600B-TR (STMicroelectronics) are functionally compatible alternatives. Both maintain the 4A current rating, 5mA gate trigger current, and 10mA hold current specifications. T405Q-600B-TR offers extended operating temperature range (-40°C to 125°C) compared to the original specification (-40°C to 110°C). BT136S-600D,118 specifies maximum gate trigger voltage of 1.5V, which is within acceptable tolerance for sensitive gate applications.

All substitute parts are ROHS3 compliant with MSL 1 rating, matching the original component's environmental and regulatory status.

Frequently Asked Questions (FAQ)

Q: Can L4004D5RP or L6004D5RP be used as direct replacements for L2004D5RP? A: Yes. Both parts maintain identical gate trigger voltage (1.3V max), gate trigger current (5mA max), and hold current (10mA max) specifications. The higher voltage ratings (400V and 600V respectively) are compatible with 200V circuit designs and provide additional design margin.

Q: What is the difference between the Littelfuse substitutes and the alternative manufacturers? A: Littelfuse L4004D5RP and L6004D5RP are from the same manufacturer as the original part, ensuring consistency in gate trigger characteristics and performance. BT136S-600D,118 and T405Q-600B-TR are from different manufacturers but meet the same electrical specifications. T405Q-600B-TR offers a wider operating temperature range (-40°C to 125°C).

Q: Are all substitute parts available in the same package? A: Yes. All substitute parts use the TO-252-3 DPAK package with identical pinout and lead configuration, enabling direct PCB replacement without layout modifications.

Q: Does the higher voltage rating of substitute parts affect circuit operation? A: No. A TRIAC rated for higher off-state voltage operates identically in lower voltage circuits. The higher rating provides additional safety margin and does not alter switching characteristics or gate trigger requirements.

Q: Are there any compliance or regulatory differences between the options? A: All parts are ROHS3 compliant with MSL 1 rating. L6004D5RP and BT136S-600D,118 are REACH Affected; L4004D5RP and T405Q-600B-TR are REACH Unaffected. Selection should consider supply chain and regulatory requirements specific to the application region.

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