2N6394 Silicon Controlled Rectifier - Equivalent & Substitute Parts

Part Overview

The 2N6394 is a 50V, 12A standard recovery silicon controlled rectifier (SCR) in TO-220AB through-hole packaging. This component is classified as obsolete, though 5,300 units remain in stock. The 2N6394 serves as a thyristor switch for AC power control applications requiring moderate voltage and current ratings. Due to its obsolete status, equivalent and substitute parts with active product status are available to ensure design continuity and supply chain reliability.

Substiute Parts

2N6394

onsemiIn Stock: 53152N6394 Datasheet

Current PartRFQ

2N6394G

onsemiIn Stock: 34782N6394G Datasheet

DirectRFQ

TYN612RG

STMicroelectronicsIn Stock: 4921TYN612RG Datasheet

SimilarRFQ

2N6394TG

onsemiIn Stock: 191742N6394TG Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 2N6394 is determined by electrical and mechanical compatibility within the following criteria:

Direct Manufacturer Equivalents maintain identical electrical specifications across all critical parameters: 50V off-state voltage, 12A RMS on-state current, 1.5V gate trigger voltage, 30mA gate trigger current, 2.2V on-state voltage, 50mA hold current, and TO-220-3 through-hole packaging. These parts are functionally interchangeable in the same circuit without design modification.

Similar Manufacturer Substitutes share the same on-state current rating (12A RMS), standard recovery SCR type, TO-220-3 package, and through-hole mounting, but differ in off-state voltage rating. The TYN612RG operates at 600V off-state voltage, which is suitable for applications where the 2N6394's 50V rating is insufficient, provided the circuit design accommodates the higher voltage rating.

Parametric Equivalents are identical to the main part in all electrical and mechanical specifications, differing only in packaging format or product status classification.

Parameter Comparison

Engineering Selection Recommendations

For direct replacement in existing designs: Select 2N6394G or 2N6394TG. Both are active-status onsemi products with identical electrical specifications to the obsolete 2N6394. The 2N6394TG offers significantly higher inventory availability (19,150 units) compared to 2N6394G (3,400 units), making it the preferred choice for volume production or long-term supply assurance.

For new designs or applications requiring higher voltage tolerance: The TYN612RG from STMicroelectronics is suitable as a substitute where the circuit can accommodate 600V off-state voltage. This part is ROHS3 compliant, addressing environmental compliance requirements that the 2N6394 does not meet. The TYN612RG exhibits lower gate trigger current (15mA vs. 30mA) and lower on-state voltage (1.6V vs. 2.2V), resulting in reduced gate drive power requirements and lower conduction losses.

For compliance-critical applications: The TYN612RG is the only substitute with confirmed ROHS3 compliance. If RoHS compliance is mandatory, this part is the appropriate selection despite the higher voltage rating.

Frequently Asked Questions (FAQ)

Q: Can the 2N6394G be used as a direct drop-in replacement for the 2N6394?

A: Yes. The 2N6394G maintains identical electrical specifications across all critical parameters: 50V off-state voltage, 12A RMS on-state current, 1.5V gate trigger voltage, 30mA gate trigger current, 2.2V on-state voltage, 50mA hold current, and TO-220-3 through-hole packaging. No circuit modification is required.

Q: What is the primary difference between the 2N6394TG and the 2N6394G?

A: Both parts are electrically identical. The distinction is packaging format and inventory availability. The 2N6394TG is available in bulk packaging with 19,150 units in stock, while the 2N6394G is supplied in bulk packaging with 3,400 units. For production applications, the 2N6394TG provides superior supply continuity.

Q: Can the TYN612RG replace the 2N6394 in a 50V circuit?

A: The TYN612RG is electrically compatible with 50V circuits because its 600V off-state voltage rating exceeds the 50V requirement. However, the higher voltage rating introduces design considerations. The TYN612RG exhibits lower on-state voltage (1.6V vs. 2.2V) and lower gate trigger current (15mA vs. 30mA), which may affect circuit performance in applications with tight voltage or current margins. Verification of circuit operation is necessary before production implementation.

Q: Is the TYN612RG suitable for RoHS-compliant applications?

A: Yes. The TYN612RG is ROHS3 compliant, making it the appropriate choice for applications requiring environmental compliance certification. The 2N6394, 2N6394G, and 2N6394TG are not RoHS compliant.

Q: What is the difference between TO-220AB and TO-220 packaging?

A: Both designations refer to the same TO-220-3 through-hole package form factor. The "AB" suffix in TO-220AB and the generic "TO-220" designation are equivalent for mechanical and electrical purposes. All substitute parts are compatible with existing TO-220-3 footprints and mounting hardware.

Q: Which substitute part should be selected for new design work?

A: For new designs without RoHS compliance requirements, the 2N6394TG is recommended due to active product status, identical specifications, and highest inventory availability. For new designs requiring RoHS compliance, the TYN612RG is the appropriate selection. Both parts are actively manufactured and supported by their respective suppliers.