L2004L5 Equivalent & Substitute Parts

Part Overview

The L2004L5 is a Logic-Sensitive Gate TRIAC manufactured by Littelfuse Inc., rated for 200 V off-state voltage and 4 A on-state current in a TO-220 Isolated Tab package. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity. The part operates across a temperature range of -40°C to 110°C and features a maximum gate trigger voltage of 1.3 V with a 5 mA gate trigger current specification.

Substiute Parts

L2004L5

Littelfuse Inc.In Stock: 775L2004L5 Datasheet

Current PartRFQ

BT136X-600D,127

WeEn SemiconductorsIn Stock: 3470BT136X-600D,127 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the L2004L5 is determined by the following critical parameters:

• Triac Type: Must be Logic-Sensitive Gate configuration
• Current Rating: On-state current must be rated at or above 4 A (RMS)
• Gate Trigger Characteristics: Maximum gate trigger voltage and current must support low-voltage gate drive circuits
• Mounting and Package: Through-hole TO-220 family packages with isolated tab configuration
• Compliance: RoHS compliance status for regulatory alignment

The BT136X-600D,127 qualifies as a substitute based on matching triac type, current rating, gate trigger specifications, through-hole mounting, and compliance certifications. The higher off-state voltage rating (600 V versus 200 V) represents an uprating that maintains backward compatibility in applications where the L2004L5 was specified.

Parameter Comparison

Engineering Selection Recommendations

The BT136X-600D,127 is the designated manufacturer-recommended substitute for the L2004L5. Selection of this alternative is supported by:

• Product Status: The substitute is active and in production, ensuring long-term availability and supply chain stability
• Compliance Alignment: Both parts maintain RoHS compliance, satisfying regulatory requirements for new designs and legacy support
• Electrical Compatibility: Matching gate trigger specifications (5 mA Igt, 10 mA Ih) ensure compatibility with existing gate drive circuits designed for the L2004L5
• Thermal Performance: The substitute offers an extended maximum junction temperature (125°C versus 110°C), providing improved thermal margin in applications operating near temperature limits
• Voltage Uprating: The 600 V off-state rating provides enhanced voltage margin compared to the original 200 V specification, suitable for applications with transient voltage considerations

Frequently Asked Questions (FAQ)

Q: Can the BT136X-600D,127 be used as a direct replacement for the L2004L5 in existing PCB layouts?

A: Yes. Both parts use TO-220-3 Isolated Tab packages with identical pin configurations and mounting footprints. No PCB modifications are required.

Q: What is the significance of the higher 600 V off-state voltage rating on the substitute?

A: The BT136X-600D,127 is rated for 600 V off-state voltage compared to the L2004L5's 200 V rating. This represents an uprating that maintains backward compatibility. Applications originally designed for 200 V operation will function correctly with the higher-rated substitute, with no adverse effects on circuit performance.

Q: Are the gate trigger characteristics compatible between these parts?

A: Yes. Both parts specify a maximum gate trigger current of 5 mA and maximum hold current of 10 mA. The gate trigger voltage differs slightly (1.3 V for L2004L5 versus 1.5 V for BT136X-600D,127), but this 0.2 V difference is within typical gate drive circuit tolerances and does not affect functional compatibility.

Q: Does the substitute support the same operating temperature range?

A: The substitute supports a higher maximum junction temperature of 125°C compared to the L2004L5's 110°C limit. This provides additional thermal headroom. The minimum operating temperature remains compatible with the original specification.

Q: What packaging options are available for the substitute?

A: The BT136X-600D,127 is supplied in Tube packaging, whereas the L2004L5 inventory status does not specify packaging format. Both use the TO-220F (Full Pack, Isolated Tab) case style, which is mechanically and electrically compatible with the original TO-220 Isolated Tab package.