T106M1 Equivalent & Substitute Parts

Part Overview

The T106M1 is a Sensitive Gate SCR (Silicon Controlled Rectifier) rated for 600V off-state voltage and 4A RMS on-state current in a TO-202 Long Tab through-hole package. Manufactured by Littelfuse Inc., this component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The T106M1 remains available in inventory (8300 pcs), but active alternatives with improved electrical characteristics and modern packaging are recommended for new applications.

Substiute Parts

T106M1

Littelfuse Inc.In Stock: 8353T106M1 Datasheet

Current PartRFQ

S6004VS2TP

Littelfuse Inc.In Stock: 3941S6004VS2TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the T106M1 is determined by electrical equivalence across the following critical parameters:

• Voltage Rating: Off-state voltage must be 600V or greater
• Current Rating: On-state RMS current must support 4A minimum
• Gate Characteristics: Gate trigger voltage (Vgt) and gate trigger current (Igt) must remain within specified maximums to ensure compatible gate drive requirements
• On-State Voltage Drop: Vtm must be acceptable for the application thermal budget
• SCR Type: Sensitive Gate classification ensures low gate drive requirements
• Operating Temperature: Must span -40°C to 110°C minimum
• Compliance: RoHS3 compliance and EAR99 export classification maintained

The S6004VS2TP qualifies as a direct electrical equivalent with improved performance characteristics and active product status. The primary difference is packaging format (TO-251 vs. TO-202), which requires PCB layout modification but does not affect electrical function.

Parameter Comparison

Engineering Selection Recommendations

The S6004VS2TP is the recommended substitute for the T106M1 based on the following engineering criteria:

Electrical Equivalence: All critical electrical parameters (voltage rating, gate trigger characteristics, on-state current) are identical or superior. The lower on-state voltage drop (1.6V vs. 2.2V) reduces power dissipation and improves thermal performance.

Product Status: The S6004VS2TP is active with 3834 pcs in stock, ensuring long-term availability and supply chain stability. The T106M1 is obsolete, presenting procurement risk for ongoing production.

Compliance: Both parts maintain ROHS3 compliance and EAR99 export classification, ensuring regulatory continuity.

Surge Current Rating: The S6004VS2TP provides higher non-repetitive surge current capability (25A/30A vs. 16A/20A), offering improved robustness in transient conditions.

Packaging Consideration: The TO-251 package requires PCB layout modification from the TO-202 footprint. This is a mechanical change only and does not affect electrical function or gate drive requirements.

Frequently Asked Questions (FAQ)

Q: Can the S6004VS2TP directly replace the T106M1 without circuit modification?

A: Electrical substitution is direct. Gate drive circuits, voltage ratings, and current handling remain identical. PCB layout must be modified to accommodate the TO-251 package footprint, as the TO-202 and TO-251 have different lead configurations and spacing.

Q: What is the difference between TO-202 and TO-251 packages?

A: TO-202 is a through-hole package with long leads and a tab for mechanical mounting. TO-251 (IPak/V-Pak) is a through-hole package with shorter leads and a different lead pitch. Both are through-hole technologies; the difference is mechanical form factor only.

Q: Does the lower on-state voltage drop of the S6004VS2TP affect circuit operation?

A: No. The lower Vtm (1.6V vs. 2.2V) is an improvement that reduces power dissipation and heat generation. Circuits designed for the T106M1 will operate with the S6004VS2TP with improved thermal characteristics.

Q: Are gate drive requirements identical between these parts?

A: Yes. Both parts have identical gate trigger voltage (800 mV max) and gate trigger current (200 µA max) specifications. Existing gate drive circuits require no modification.

Q: Is the S6004VS2TP suitable for the same temperature range as the T106M1?

A: Yes. Both parts operate across -40°C to 110°C, ensuring thermal compatibility in all specified operating conditions.

Q: What is the inventory status for substitution planning?

A: The T106M1 has 8300 pcs available but is obsolete. The S6004VS2TP has 3834 pcs in stock and is active. For new designs, the S6004VS2TP is the recommended choice for supply chain continuity.