C106D1G Equivalent & Substitute Parts

Part Overview

The C106D1G is a sensitive gate SCR (Silicon Controlled Rectifier) rated for 400V off-state voltage with 4A RMS current capacity. Manufactured by Littelfuse, this through-hole thyristor is designed for applications requiring controlled rectification and switching in industrial and consumer electronics. The part is active in production with ROHS3 compliance and unlimited moisture sensitivity rating. Substitute parts may be required due to packaging constraints, inventory availability, or specific application requirements related to package form factor or thermal characteristics.

Substiute Parts

C106D1G

LittelfuseIn Stock: 29687C106D1G Datasheet

Current PartRFQ

S4004VS2TP

Littelfuse Inc.In Stock: 2208S4004VS2TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the C106D1G with the S4004VS2TP is based on electrical parameter equivalence within the sensitive gate SCR category. Both parts maintain identical off-state voltage (400V) and gate trigger specifications (Vgt max 800mV, Igt max 200µA), ensuring functional compatibility in gate drive circuits. The primary difference is package form factor: C106D1G uses TO-225AA (TO-126-3) while S4004VS2TP uses TO-251AA (IPak). Both packages are through-hole mounted and suitable for PCB assembly. The substitute part demonstrates improved on-state voltage characteristics (1.6V vs 2.2V max) and higher non-repetitive surge current rating (25-30A vs 20A), making it electrically superior for the same voltage and current class application.

Parameter Comparison

Engineering Selection Recommendations

Both C106D1G and S4004VS2TP are active production parts with ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements. Selection between these parts depends on PCB layout constraints and thermal management requirements. The C106D1G in TO-225AA package provides a compact through-hole option suitable for standard PCB hole spacing. The S4004VS2TP in TO-251AA (IPak) package offers improved thermal dissipation characteristics due to larger lead frame geometry, beneficial for applications with sustained current operation or elevated ambient temperatures. Both parts share identical gate drive requirements and voltage ratings, ensuring direct functional substitution when package footprint compatibility is confirmed.

Frequently Asked Questions (FAQ)

Q: Can S4004VS2TP directly replace C106D1G in existing designs? A: Electrical substitution is valid due to matching voltage ratings (400V), gate trigger specifications (800mV max), and RMS current capacity (4A). PCB layout modification is required due to different package footprints (TO-225AA vs TO-251AA). Verify hole spacing and lead positioning before assembly.

Q: What are the key differences between these SCR parts? A: Both are 400V sensitive gate SCRs with identical gate drive parameters. S4004VS2TP provides lower on-state voltage drop (1.6V vs 2.2V), lower off-state leakage current (2µA vs 10µA), and higher surge current rating (25-30A vs 20A). Package form factor differs: TO-225AA versus TO-251AA.

Q: Are there thermal performance differences? A: TO-251AA (IPak) package used in S4004VS2TP typically provides superior thermal performance compared to TO-225AA due to larger lead frame surface area. This is beneficial for continuous operation at rated current or in elevated temperature environments.

Q: Do both parts require identical gate drive circuits? A: Yes. Both parts share identical gate trigger voltage (800mV max) and gate trigger current (200µA max) specifications, allowing use of the same gate drive circuit design.

Q: What compliance certifications apply to both parts? A: Both C106D1G and S4004VS2TP are ROHS3 compliant, REACH unaffected, and carry EAR99 ECCN classification with HTSUS code 8541.30.0080.