L2008L8 TRIAC Equivalent & Substitute Parts

Part Overview

The L2008L8 is a Logic-Sensitive Gate TRIAC manufactured by Littelfuse, rated for 200V off-state voltage and 8A on-state current in a TO-220 Isolated Tab package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Substitute TRIACs must maintain compatibility across gate trigger characteristics, current ratings, and thermal operating ranges while accommodating higher voltage ratings available in active product lines.

Substiute Parts

L2008L8

LittelfuseIn Stock: 756L2008L8 Datasheet

Current PartRFQ

BT137X-600E,127

WeEn SemiconductorsIn Stock: 5276BT137X-600E,127 Datasheet

MFR RecommendedRFQ

BTA08-600SWRG

STMicroelectronicsIn Stock: 26157BTA08-600SWRG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the L2008L8 TRIAC is based on the following critical parameters:

Gate Trigger Compatibility: Both substitute parts maintain the maximum gate trigger voltage (Vgt) and current (Igt) specifications required for logic-level gate drive circuits. The L2008L8 specifies Vgt (Max) of 1.3V and Igt (Max) of 10mA.

Current Rating: All substitute parts are rated for 8A on-state current (It (RMS) Max), matching the original specification.

Configuration: Single TRIAC configuration is maintained across all parts.

Package Compatibility: Substitute parts are available in TO-220 package variants (TO-220F Full Pack and standard TO-220), which are mechanically compatible with the original TO-220 Isolated Tab footprint for through-hole mounting applications.

Voltage Derating: The substitute parts are rated for 600V off-state voltage, which exceeds the original 200V specification. This higher voltage rating provides design margin and is suitable for applications originally designed for 200V operation.

Compliance: All parts maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating.

Parameter Comparison

Engineering Selection Recommendations

BTA08-600SWRG (STMicroelectronics) is the primary substitute for the L2008L8. This part maintains the exact gate trigger voltage specification (Vgt Max 1.3V) and provides the widest operating temperature range (-40°C to 125°C), matching the lower temperature bound of the original part. The BTA08-600SWRG is in active production status with high inventory availability (26,100 pcs), ensuring long-term supply continuity. REACH Unaffected status provides additional regulatory compliance assurance.

BT137X-600E,127 (WeEn Semiconductors) serves as a secondary substitute. This part maintains gate trigger current specification (Igt Max 10mA) and offers active product status with substantial inventory (5,249 pcs). The gate trigger voltage specification (Vgt Max 1.5V) is slightly higher than the original but remains within acceptable logic-level gate drive tolerances. Operating temperature maximum of 125°C exceeds the original specification. REACH Affected status requires verification for specific end-use applications.

Both substitute parts are suitable for applications originally designed for the L2008L8, with the understanding that the higher 600V off-state voltage rating provides additional design margin without requiring circuit modifications.

Frequently Asked Questions (FAQ)

Q: Can the BTA08-600SWRG directly replace the L2008L8 in existing designs?

A: Yes. The BTA08-600SWRG maintains the same 8A current rating, gate trigger voltage specification (1.3V max), and through-hole TO-220 package footprint. The higher 600V off-state voltage rating is a superset of the original 200V specification and does not require circuit changes.

Q: What is the difference between the TO-220 Isolated Tab and TO-220F Full Pack packages?

A: Both are through-hole TO-220 variants suitable for the same PCB footprint. The Isolated Tab configuration provides electrical isolation of the mounting tab, while the Full Pack variant may have different thermal characteristics. Verify thermal requirements for your specific application.

Q: Why do the substitute parts have higher voltage ratings (600V) than the original (200V)?

A: Higher voltage-rated TRIACs are standard in active product lines. The 600V rating provides design margin and is fully compatible with 200V applications. No circuit modifications are required.

Q: Are there differences in gate trigger characteristics between the substitutes?

A: The BTA08-600SWRG matches the original Vgt specification (1.3V max). The BT137X-600E,127 specifies Vgt Max of 1.5V, which is slightly higher but remains within logic-level gate drive tolerances. Both maintain the same Igt specification (10mA max).

Q: What is the inventory status of these substitute parts?

A: Both substitutes are in active production with substantial inventory: BTA08-600SWRG (26,100 pcs) and BT137X-600E,127 (5,249 pcs). The L2008L8 is obsolete with limited remaining stock (677 pcs).

Q: Do the substitute parts meet the same compliance standards?

A: Yes. All parts are ROHS3 compliant and carry MSL Level 1 (Unlimited) moisture sensitivity rating. The BTA08-600SWRG is REACH Unaffected, while the BT137X-600E,127 is REACH Affected. Verify REACH compliance requirements for your end-use application.