2N6400 Silicon Controlled Rectifier Equivalent & Substitute Parts

Part Overview

The 2N6400 is a Silicon Controlled Rectifier (SCR) rated for 50V off-state voltage and 16A RMS on-state current in a TO-220AB through-hole package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The 2N6400 operates across a temperature range of -40°C to 125°C and features standard recovery characteristics suitable for AC switching applications.

Substiute Parts

2N6400

onsemiIn Stock: 22912N6400 Datasheet

Current PartRFQ

2N6400G

onsemiIn Stock: 37532N6400G Datasheet

DirectRFQ

2N6400G

onsemiIn Stock: 37532N6400G Datasheet

DirectRFQ

TYN616RG

STMicroelectronicsIn Stock: 28563TYN616RG Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 2N6400 SCR is determined by matching the following critical electrical and mechanical parameters:

Direct Equivalence Criteria:

• Voltage - Off State: 50V minimum
• Current - On State (It RMS): 16A
• Gate Trigger Voltage (Vgt): 1.5V maximum
• Gate Trigger Current (Igt): 30mA maximum
• On-State Voltage (Vtm): 1.7V maximum
• Hold Current (Ih): 40mA maximum
• Package / Case: TO-220-3
• Mounting Type: Through Hole
• SCR Type: Standard Recovery

Similar Substitution Criteria: Parts meeting the same package, mounting type, and SCR recovery characteristics but with different voltage ratings may be suitable for applications where the higher voltage rating does not create design conflicts. The 16A RMS current rating and standard recovery type remain constant requirements.

Parameter Comparison

Engineering Selection Recommendations

2N6400G (Direct Equivalent): The 2N6400G from onsemi is a direct electrical and mechanical equivalent to the 2N6400. It maintains identical voltage ratings (50V off-state), current specifications (16A RMS), and gate trigger parameters. The primary distinction is product status: 2N6400G is active with 3724 units in stock, whereas the 2N6400 is obsolete. This part is the preferred choice for direct replacement in existing designs without circuit modification.

TYN616RG (Similar Substitute): The TYN616RG from STMicroelectronics is a similar substitute with a higher off-state voltage rating of 600V. All other critical parameters align: 16A RMS current, standard recovery type, TO-220-3 package, and identical operating temperature range. The TYN616RG is ROHS3 compliant and offers superior off-state voltage capability. This part is suitable for applications where higher voltage margin is acceptable or beneficial. The lower off-state leakage current (5µA vs. 10µA) and slightly lower gate trigger current (25mA vs. 30mA) represent minor improvements in performance characteristics.

Frequently Asked Questions (FAQ)

Q: Can the 2N6400G be used as a direct replacement for the 2N6400? A: Yes. The 2N6400G is electrically and mechanically identical to the 2N6400, with matching voltage ratings, current specifications, and package configuration. The only difference is product status and availability.

Q: Is the TYN616RG compatible with 2N6400 circuit designs? A: The TYN616RG is mechanically compatible (TO-220-3 package) and functionally compatible for most applications. The 600V off-state rating is higher than the 2N6400's 50V rating. Verify that your circuit design does not depend on the specific 50V voltage threshold. The TYN616RG will operate correctly in circuits designed for 50V SCRs when the applied voltage does not exceed 50V.

Q: What is the difference between direct equivalence and similar substitution? A: Direct equivalence (2N6400G) matches all electrical and mechanical parameters exactly. Similar substitution (TYN616RG) matches the package, mounting type, current rating, and recovery characteristics but differs in voltage rating. Similar substitutes require circuit verification to confirm compatibility.

Q: Does the TYN616RG's higher voltage rating affect circuit performance? A: The higher 600V rating does not negatively affect performance in circuits designed for 50V operation. The TYN616RG will function identically when applied voltages remain within the original 50V specification. The higher voltage rating provides additional design margin and protection against voltage transients.

Q: Are there RoHS compliance considerations for these substitutes? A: The 2N6400 is RoHS non-compliant. The 2N6400G status is not specified. The TYN616RG is ROHS3 compliant. For applications requiring RoHS compliance, the TYN616RG is the appropriate selection.

Q: What packaging options are available for these parts? A: The 2N6400 is supplied in standard packaging. The 2N6400G is available in bulk packaging. The TYN616RG is supplied in tube packaging. All three parts use the TO-220AB through-hole package configuration.