L6004L5 TRIAC Equivalent & Substitute Parts

Part Overview

The L6004L5 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 TO-220-3 Isolated Tab through-hole package. This part is discontinued at DiGi Electronics. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for production and repair applications.

Key Parameters

Parameter	L6004L5
Manufacturer	Littelfuse Inc.
Voltage - Off State	600 V
Current - On State (It (RMS)) (Max)	4 A
Triac Type	Logic - Sensitive Gate
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-220-3 Isolated Tab
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant
Product Status	Discontinued at DiGi Electronics

Substitute Part Grouping Explanation

Substitution of the L6004L5 is determined by the following critical parameters:

Voltage - Off State: Must be 600 V or higher
Current - On State (It (RMS)) (Max): Must be 4 A or higher
Triac Type: Logic - Sensitive Gate preferred; Alternistor - Snubberless acceptable for higher current ratings
Voltage - Gate Trigger (Vgt) (Max): Must not exceed 1.5 V
Current - Gate Trigger (Igt) (Max): Must not exceed 5 mA for sensitive gate types
Package / Case: TO-220-3 or TO-220-3F (through-hole, isolated tab)
Mounting Type: Through Hole
RoHS Status: ROHS3 Compliant or RoHS Compliant

Substitute parts are grouped into two categories:

Category 1: Direct Sensitive Gate Replacements (4 A - 6 A)

BT136X-600D,127 (WeEn Semiconductors): 4 A Logic - Sensitive Gate, active product
BTA06-600TWRG (STMicroelectronics): 6 A Logic - Sensitive Gate, active product

Category 2: Higher Current Alternatives (6 A - 12 A)

BTA06-600BWRG, BTA06-600CWRG (STMicroelectronics): 6 A Alternistor - Snubberless
BTA08-600CWRG, BTA08-600SWRG (STMicroelectronics): 8 A Alternistor / Sensitive Gate
BTA10-600BRG, BTA10-600CRG (STMicroelectronics): 10 A Standard TRIAC
BTA12-600BRG, BTA12-600CWRG (STMicroelectronics): 12 A Standard / Alternistor

Parameter Comparison

Part Number	Manufacturer	Triac Type	Voltage - Off State	Current - On State (Max)	Vgt (Max)	Igt (Max)	Ih (Max)	Operating Temp	Package	Product Status
L6004L5	Littelfuse Inc.	Logic - Sensitive Gate	600 V	4 A	1.3 V	5 mA	10 mA	-40°C ~ 110°C	TO-220-3 Isolated Tab	Discontinued
BT136X-600D,127	WeEn Semiconductors	Logic - Sensitive Gate	600 V	4 A	1.5 V	5 mA	10 mA	-40°C ~ 125°C	TO-220-3F	Active
BTA06-600TWRG	STMicroelectronics	Logic - Sensitive Gate	600 V	6 A	1.3 V	5 mA	10 mA	-40°C ~ 125°C	TO-220-3	Active
BTA06-600BWRG	STMicroelectronics	Alternistor - Snubberless	600 V	6 A	1.3 V	50 mA	50 mA	-40°C ~ 125°C	TO-220-3	Active
BTA06-600CWRG	STMicroelectronics	Alternistor - Snubberless	600 V	6 A	1.3 V	35 mA	35 mA	-40°C ~ 125°C	TO-220-3	Active
BTA08-600CWRG	STMicroelectronics	Alternistor - Snubberless	600 V	8 A	1.3 V	35 mA	35 mA	-40°C ~ 125°C	TO-220-3	Active
BTA08-600SWRG	STMicroelectronics	Logic - Sensitive Gate	600 V	8 A	1.3 V	10 mA	15 mA	-40°C ~ 125°C	TO-220-3	Active
BTA10-600BRG	STMicroelectronics	Standard	600 V	10 A	1.3 V	50 mA	50 mA	-40°C ~ 125°C	TO-220-3	Active
BTA10-600CRG	STMicroelectronics	Standard	600 V	10 A	1.3 V	25 mA	25 mA	-40°C ~ 125°C	TO-220-3	Active
BTA12-600BRG	STMicroelectronics	Standard	600 V	12 A	1.3 V	50 mA	50 mA	-40°C ~ 125°C	TO-220-3	Active
BTA12-600CWRG	STMicroelectronics	Alternistor - Snubberless	600 V	12 A	1.3 V	35 mA	35 mA	-40°C ~ 125°C	TO-220-3	Active

Engineering Selection Recommendations

Primary Recommendation: BT136X-600D,127

The BT136X-600D,127 from WeEn Semiconductors is the closest functional equivalent to the L6004L5. It maintains the same 4 A current rating, 600 V voltage rating, and Logic - Sensitive Gate configuration. The gate trigger voltage (Vgt) of 1.5 V is within acceptable tolerance relative to the L6004L5 specification of 1.3 V. This part is in active production status with 3400 units in stock. The TO-220-3F package is mechanically compatible with TO-220-3 Isolated Tab applications. Operating temperature range extends to 125°C, exceeding the L6004L5 specification. RoHS compliance is maintained.

Secondary Recommendation: BTA06-600TWRG

The BTA06-600TWRG from STMicroelectronics provides a 6 A rated alternative with Logic - Sensitive Gate characteristics matching the L6004L5 gate trigger specifications (Vgt 1.3 V, Igt 5 mA). This part is suitable for applications where the 4 A rating of the L6004L5 represents a design margin and higher current capacity is acceptable. The part is in active production with 2058 units in stock. Operating temperature range is -40°C to 125°C. ROHS3 compliance is confirmed.

Higher Current Alternatives

For applications requiring higher current capacity or where gate trigger current specifications differ, the BTA08-600SWRG (8 A Logic - Sensitive Gate) and BTA10-600CRG (10 A Standard) provide active alternatives with confirmed RoHS compliance and extended operating temperature ranges. These parts are suitable only if circuit design permits the increased current ratings and gate trigger characteristics.

Frequently Asked Questions (FAQ)

Q: Can the BT136X-600D,127 directly replace the L6004L5 without circuit modification?

A: Yes. The BT136X-600D,127 maintains the same voltage rating (600 V), current rating (4 A), and gate trigger specifications (Vgt 1.5 V, Igt 5 mA). The TO-220-3F package is mechanically and electrically compatible with TO-220-3 Isolated Tab applications. No circuit modification is required.

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

A: Logic - Sensitive Gate TRIACs require lower gate trigger current (typically 5 mA) and are designed for low-power gate drive circuits. Alternistor - Snubberless TRIACs require higher gate trigger current (25-50 mA) but offer improved EMI performance and do not require external snubber networks. Selection depends on gate drive circuit capability and EMI requirements.

Q: Why do some substitute parts have higher gate trigger current (Igt) specifications?

A: Higher Igt values indicate different TRIAC technology. Standard and Alternistor types require more gate current to trigger than Logic - Sensitive Gate types. If the original circuit provides only 5 mA gate drive, parts with Igt specifications of 25 mA or higher will not function reliably and must not be selected.

Q: Is the TO-220-3F package compatible with TO-220-3 Isolated Tab mounting?

A: Yes. Both TO-220-3 and TO-220-3F are through-hole packages with identical pin spacing and isolated tab thermal design. They are mechanically and electrically interchangeable in PCB layouts designed for TO-220-3 components.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed carry either ROHS3 Compliant or RoHS Compliant certification, matching the compliance status of the L6004L5.

Q: Can I use a 6 A or 8 A TRIAC in place of the 4 A L6004L5?

A: Yes, if the circuit design permits. Higher current-rated TRIACs are backward compatible with lower current applications. However, gate trigger current specifications must match the available gate drive circuit. Logic - Sensitive Gate types (BTA06-600TWRG, BTA08-600SWRG) are preferred over Standard or Alternistor types for direct substitution.

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