2N6401G SCR Thyristor - Equivalent & Substitute Parts

Part Overview

The 2N6401G is an active SCR (Silicon Controlled Rectifier) thyristor manufactured by Littelfuse Inc., rated for 100V off-state voltage and 16A RMS on-state current in a TO-220AB through-hole package. This component is ROHS3 compliant and designed for standard recovery applications across industrial and power control circuits. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when design requirements permit higher voltage ratings.

Substiute Parts

2N6401G

Littelfuse Inc.In Stock: 19052N6401G Datasheet

Current PartRFQ

TYN616RG

STMicroelectronicsIn Stock: 28563TYN616RG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The TYN616RG from STMicroelectronics qualifies as a substitute based on the following allowed parameters:

• Identical RMS on-state current rating: 16A
• Identical gate trigger voltage maximum: 1.5V
• Identical hold current maximum: 40mA
• Identical operating temperature range: -40°C to 125°C
• Identical package and mounting type: TO-220-3 through-hole
• Identical SCR type classification: Standard Recovery
• Identical compliance status: ROHS3 compliant

The primary difference is the off-state voltage rating: TYN616RG is rated for 600V versus the 2N6401G's 100V. This higher voltage rating does not prevent substitution in applications designed for 100V operation, as the substitute part maintains all critical switching and thermal characteristics.

Parameter Comparison

Engineering Selection Recommendations

Both the 2N6401G and TYN616RG are active products with ROHS3 compliance and REACH unaffected status. Selection between these parts should be based on circuit voltage requirements and application constraints:

• Use 2N6401G when the application is specifically designed for 100V maximum off-state voltage and component availability is sufficient.
• Use TYN616RG when higher voltage margin is required, when the 2N6401G is unavailable, or when sourcing from STMicroelectronics inventory is preferred. The 600V rating provides additional voltage headroom without compromising the 16A current handling or switching characteristics.

Both parts are suitable for industrial power control, motor control, and switching applications within their respective voltage specifications.

Frequently Asked Questions (FAQ)

Q: Can TYN616RG replace 2N6401G in a 100V circuit? A: Yes. The TYN616RG's 600V off-state voltage rating is higher than required but does not prevent operation in 100V applications. All switching parameters, current ratings, and thermal characteristics are compatible.

Q: What is the difference in gate trigger requirements? A: Both parts have identical maximum gate trigger voltage (1.5V). The TYN616RG requires slightly lower gate trigger current (25mA max versus 30mA max), which is a favorable characteristic for gate drive circuit design.

Q: Are the packages physically identical? A: Yes. Both parts use TO-220-3 through-hole packages with identical pin configurations and mounting requirements. PCB layout and heatsinking considerations remain unchanged.

Q: What is the difference in on-state voltage drop? A: The TYN616RG has a slightly lower maximum on-state voltage (1.6V versus 1.7V), resulting in marginally lower power dissipation during conduction.

Q: Are both parts RoHS compliant? A: Yes. Both 2N6401G and TYN616RG are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: Which part has lower leakage current? A: The TYN616RG has lower off-state leakage current (5µA maximum versus 10µA maximum), indicating superior blocking characteristics.