L2004V6 Equivalent & Substitute Parts

Part Overview

The L2004V6 is a Logic - Sensitive Gate TRIAC rated for 200 V off-state voltage and 4 A on-state current, manufactured by Littelfuse Inc. in a TO-251 (V-Pak/I-Pak) through-hole package. This component is discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing design requirements and production continuity. The part is ROHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Key Parameters

Parameter	L2004V6
Triac Type	Logic - Sensitive Gate
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-251-3 Short Leads, IPak, TO-251AA
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the L2004V6 are qualified based on the following electrical and mechanical parameters:

Triac Type: Logic - Sensitive Gate configuration must be maintained
Current Rating: On-state current (It (RMS)) must be 4 A or greater
Gate Trigger Parameters: Voltage (Vgt) and current (Igt) must be compatible with 1.3 V maximum and 5 mA maximum respectively
Hold Current: Must not exceed 10 mA
Mounting Type: Through-hole configuration required
Compliance: ROHS3 compliance required

The substitute parts identified (BT134-600D,127 and T405Q-600H) meet these criteria. Both are Logic - Sensitive Gate TRIACs with 4 A on-state current ratings, compatible gate trigger specifications, and through-hole mounting. The higher voltage ratings (600 V) of these substitutes provide enhanced voltage margin while maintaining electrical compatibility in applications designed for the L2004V6.

Parameter Comparison

Parameter	L2004V6	BT134-600D,127	T405Q-600H
Manufacturer	Littelfuse Inc.	WeEn Semiconductors	STMicroelectronics
Triac Type	Logic - Sensitive Gate	Logic - Sensitive Gate	Logic - Sensitive Gate
Voltage - Off State	200 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	1.5 V	1.3 V
Current - Gate Trigger (Igt) (Max)	5 mA	5 mA	5 mA
Current - Hold (Ih) (Max)	10 mA	10 mA	10 mA
Operating Temperature	-40°C ~ 110°C (TJ)	125°C (TJ)	-40°C ~ 125°C (TJ)
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	TO-251-3 Short Leads, IPak, TO-251AA	SOT-82	TO-251-3 Short Leads, IPak, TO-251AA
Product Status	Discontinued at DiGi Electronics	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

BT134-600D,127 (WeEn Semiconductors): This substitute is active in production with ROHS3 compliance. The 600 V off-state voltage rating provides increased voltage margin over the original L2004V6. Gate trigger voltage is 1.5 V maximum, which is within acceptable tolerance for gate drive circuits designed for the L2004V6. Package transition from TO-251 to SOT-82 requires PCB layout modification. Maximum operating temperature is 125°C (TJ), exceeding the L2004V6 specification.

T405Q-600H (STMicroelectronics): This substitute maintains the TO-251-3 package footprint, eliminating PCB redesign requirements. Active product status with ROHS3 compliance. Gate trigger voltage matches the L2004V6 at 1.3 V maximum. Operating temperature range extends to -40°C ~ 125°C (TJ), providing broader thermal coverage. The 600 V off-state voltage rating maintains voltage margin consistency with the BT134-600D,127 option.

Frequently Asked Questions (FAQ)

Q: Can the BT134-600D,127 be used as a direct replacement for the L2004V6?

A: Electrical substitution is valid based on gate trigger parameters and current ratings. However, the SOT-82 package differs from the TO-251 package of the L2004V6, requiring PCB layout modification and potential mechanical redesign of mounting hardware.

Q: What is the significance of the higher 600 V voltage rating in the substitute parts?

A: The 600 V off-state voltage rating of both substitutes exceeds the L2004V6 specification of 200 V. This provides additional voltage margin and allows the substitutes to function in applications with higher transient voltage conditions while maintaining compatibility with circuits designed for 200 V operation.

Q: Are the gate trigger specifications of the substitutes compatible with existing gate drive circuits?

A: Both substitutes maintain gate trigger current (Igt) at 5 mA maximum, matching the L2004V6. The BT134-600D,127 has a gate trigger voltage of 1.5 V maximum (0.2 V higher than the L2004V6), while the T405Q-600H matches at 1.3 V maximum. Gate drive circuits designed for the L2004V6 are compatible with both substitutes within these specifications.

Q: Which substitute requires less design modification?

A: The T405Q-600H maintains the TO-251-3 package footprint of the L2004V6, eliminating PCB layout changes. The BT134-600D,127 requires package transition to SOT-82, necessitating PCB redesign and potential mechanical modifications.

Q: Are both substitutes available in production quantities?

A: Yes. The BT134-600D,127 has 1,000,200 pieces in stock. The T405Q-600H has 2,070 pieces in stock. Both are active products with established supply chains.

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