Q2008F41 Equivalent & Substitute Parts

Part Overview

The Q2008F41 is a standard TRIAC rated for 200V off-state voltage and 8A on-state current in a TO-202 through-hole package, manufactured by Littelfuse Inc. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and production continuity. The part operates across an industrial temperature range of -40°C to 125°C and is RoHS3 compliant.

Substiute Parts

Q2008F41

Littelfuse Inc.In Stock: 797Q2008F41 Datasheet

Current PartRFQ

BT138-600E,127

WeEn SemiconductorsIn Stock: 1114BT138-600E,127 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Q2008F41 is constrained by the following critical parameters:

• Off-state voltage rating must equal or exceed 200V
• On-state current rating must equal or exceed 8A
• Gate trigger voltage and current characteristics must be compatible with existing circuit design
• Through-hole mounting configuration is required for PCB compatibility
• RoHS3 compliance must be maintained

The BT138-600E,127 qualifies as a substitute based on exceeding the minimum voltage and current requirements while maintaining through-hole mounting and RoHS3 compliance. However, differences in package type, gate trigger characteristics, and triac type classification must be evaluated against specific circuit requirements.

Parameter Comparison

Engineering Selection Recommendations

The BT138-600E,127 is an active product from WeEn Semiconductors and represents a viable substitute for the obsolete Q2008F41 based on the following criteria:

• Voltage rating of 600V exceeds the 200V requirement, providing design margin
• Current rating of 12A exceeds the 8A requirement
• Both components maintain RoHS3 compliance and through-hole mounting
• Gate trigger voltage of 1.5V is lower than the Q2008F41 specification of 2.5V, indicating improved gate sensitivity
• Gate trigger current of 10mA is lower than the Q2008F41 specification of 25mA

The primary consideration for substitution is the package change from TO-202 Long Tab to TO-220-3, which requires PCB layout modification. The BT138-600E,127 classification as a Logic - Sensitive Gate TRIAC differs from the Q2008F41 Standard TRIAC classification; this difference affects gate drive requirements and should be validated against circuit specifications.

Frequently Asked Questions (FAQ)

Q: Can the BT138-600E,127 directly replace the Q2008F41 without circuit modification?

A: Direct pin-for-pin replacement is not possible due to package differences (TO-202 Long Tab versus TO-220-3). PCB layout modification is required. Additionally, the sensitive gate characteristics of the BT138-600E,127 may require adjustment of gate drive circuitry.

Q: What are the implications of the higher voltage rating (600V vs 200V)?

A: The higher voltage rating provides additional design margin and allows operation in higher voltage applications. In 200V applications, the component will function within specification with no adverse effects.

Q: How do the gate trigger specifications differ, and what does this mean for circuit design?

A: The BT138-600E,127 has lower gate trigger voltage (1.5V vs 2.5V) and lower gate trigger current (10mA vs 25mA). This indicates a sensitive gate design requiring less gate drive power. Existing gate drive circuits must be evaluated to ensure compatibility.

Q: Are both components RoHS3 compliant?

A: Yes, both the Q2008F41 and BT138-600E,127 are RoHS3 compliant, maintaining regulatory compliance in the substitution.

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

A: Standard TRIACs require higher gate trigger current for reliable operation. Logic - Sensitive Gate TRIACs are designed to trigger with lower gate current, reducing gate drive circuit complexity. The BT138-600E,127 sensitive gate design may improve circuit efficiency but requires validation against the original circuit's gate drive specifications.