Q2016LH3 Equivalent & Substitute Parts

Part Overview

The Q2016LH3 is a Littelfuse Alternistor-type TRIAC rated for 200 V off-state voltage and 16 A on-state current in a TO-220 Isolated Tab package. This component is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production support. The Alternistor configuration provides snubberless operation, reducing external component requirements in AC switching applications.

Substiute Parts

Q2016LH3

Littelfuse Inc.In Stock: 817Q2016LH3 Datasheet

Current PartRFQ

BTA216X-600E,127

WeEn SemiconductorsIn Stock: 1054BTA216X-600E,127 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Q2016LH3 is determined by the following critical parameters:

• Voltage Rating (Off State): The substitute must support at least 200 V blocking voltage. Higher voltage ratings (600 V) provide additional design margin and are acceptable for applications within the original 200 V specification.
• Current Rating (On State): The substitute must support 16 A RMS current or greater.
• Gate Trigger Characteristics: Vgt and Igt values must be compatible with existing gate drive circuits. Sensitive gate TRIACs (lower trigger requirements) are acceptable substitutes for standard gate designs.
• Package Compatibility: TO-220 form factors with isolated tabs maintain thermal and electrical isolation properties of the original design.
• Temperature Range: Operating temperature capability must meet or exceed -40°C to 125°C.
• Compliance: RoHS compliance status ensures regulatory alignment.

The BTA216X-600E,127 qualifies as a direct substitute based on these criteria, despite its higher voltage rating and different TRIAC type classification (Logic - Sensitive Gate vs. Alternistor - Snubberless).

Parameter Comparison

Engineering Selection Recommendations

The BTA216X-600E,127 is the manufacturer-recommended substitute for the obsolete Q2016LH3. Selection of this substitute is justified on the following basis:

• Product Availability: The Q2016LH3 is obsolete; the BTA216X-600E,127 is active and in production.
• Current Rating Match: Both devices support 16 A on-state current, maintaining load-handling capability.
• Voltage Margin: The 600 V rating of the substitute exceeds the 200 V requirement, providing additional design margin without compromising performance in 200 V applications.
• Gate Trigger Compatibility: The substitute's lower gate trigger current (10 mA vs. 20 mA) and marginally higher gate trigger voltage (1.5 V vs. 1.3 V) are compatible with standard gate drive circuits designed for the original part.
• Compliance: Both devices meet RoHS requirements, ensuring regulatory compliance in target markets.
• Package Compatibility: Both use TO-220 Isolated Tab configurations, supporting direct mechanical and thermal integration into existing PCB designs.

Frequently Asked Questions (FAQ)

Q: Can the BTA216X-600E,127 be used as a direct replacement for the Q2016LH3 in existing designs?

A: Yes. The substitute meets or exceeds all critical electrical parameters (current rating, voltage blocking capability, gate trigger characteristics) and maintains package compatibility. No circuit modifications are required.

Q: Why does the substitute have a higher voltage rating (600 V vs. 200 V)?

A: Higher voltage ratings provide additional design margin and do not degrade performance in applications rated for 200 V. The substitute will function correctly in any circuit designed for the original 200 V part.

Q: Are there differences in gate drive requirements between the Q2016LH3 and BTA216X-600E,127?

A: The substitute has lower gate trigger current (10 mA vs. 20 mA) and marginally higher gate trigger voltage (1.5 V vs. 1.3 V). Existing gate drive circuits designed for the original part will operate the substitute within specification.

Q: What is the difference between Alternistor and Logic - Sensitive Gate TRIAC types?

A: Both are TRIAC configurations suitable for AC switching. The Alternistor type (Q2016LH3) is optimized for snubberless operation. The Logic - Sensitive Gate type (BTA216X-600E,127) features lower gate trigger requirements. Both are functionally compatible in standard AC switching applications.

Q: Are there packaging differences between the two parts?

A: Both use TO-220-3 Isolated Tab packages. The substitute is supplied in tube packaging, while the original was supplied in bulk. This does not affect electrical or mechanical compatibility.

Q: Is the operating temperature range identical?

A: The Q2016LH3 specifies -40°C to 125°C. The BTA216X-600E,127 specifies 125°C maximum junction temperature. For applications requiring the full -40°C lower temperature range, thermal analysis of the substitute in the target application is necessary to confirm performance.