SCT1216B Equivalent & Substitute Parts Reference

Part Overview

The SCT1216B is a 1.2 kV, 16 A standard recovery thyristor (SCR) manufactured by SMC Diode Solutions in a through-hole TO-220-3 package. This component is classified as obsolete, indicating it has been discontinued by the manufacturer. Finding equivalent or substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this thyristor.

Key Parameters

Parameter	Value	Unit
Voltage - Off State	1.2	kV
Voltage - Gate Trigger (Vgt) (Max)	1.3	V
Current - Gate Trigger (Igt) (Max)	40	mA
Voltage - On State (Vtm) (Max)	1.55	V
Current - On State (It (AV)) (Max)	10	A
Current - On State (It (RMS)) (Max)	16	A
Current - Hold (Ih) (Max)	80	mA
Current - Off State (Max)	10	µA
Current - Non Rep. Surge 50, 60Hz (Itsm)	200	A @ 50Hz
SCR Type	Standard Recovery	-
Operating Temperature Range	-40°C to 125°C	TJ
Mounting Type	Through Hole	-
Package / Case	TO-220-3	-

Substitute Part Grouping Explanation

Substitution of the SCT1216B is determined by strict equivalence across the following critical parameters:

Electrical Characteristics:

Off-state voltage rating (1.2 kV)
Gate trigger voltage and current specifications
On-state voltage and current ratings
Hold current and off-state leakage current
Non-repetitive surge current capability
SCR recovery type classification (Standard Recovery)

Mechanical & Environmental Specifications:

Package type (TO-220-3)
Mounting configuration (Through Hole)
Operating temperature range (-40°C to 125°C)

Regulatory & Compliance:

ECCN classification (EAR99)
HTSUS code (8541.30.0080)

The SCT1216C is identified as the manufacturer-recommended substitute. Both parts share the same base product number (SCT1216), indicating they are part of the same product family with compatible electrical and mechanical specifications.

Parameter Comparison

Parameter	SCT1216B (Main Part)	SCT1216C (Substitute)	Match Status
Manufacturer	SMC Diode Solutions	SMC Diode Solutions	Identical
Category	Thyristors	Thyristors	Identical
Base Product Number	SCT1216	SCT1216	Identical
Package / Case	TO-220-3	TO-220-3	Identical
Mounting Type	Through Hole	Through Hole	Identical
ECCN	EAR99	EAR99	Identical
HTSUS	8541.30.0080	8541.30.0080	Identical
Product Status	Obsolete	Active	Substitute is Active

Engineering Selection Recommendations

The SCT1216C is the manufacturer-recommended substitute for the obsolete SCT1216B. Selection of the SCT1216C is based on the following engineering criteria:

Product Status: The SCT1216C maintains active product status with SMC Diode Solutions, ensuring ongoing availability and supply chain support. The SCT1216B is obsolete and no longer manufactured.

Regulatory Compliance: Both parts carry identical ECCN (EAR99) and HTSUS (8541.30.0080) classifications, confirming equivalent export control and tariff treatment.

Electrical & Mechanical Compatibility: The SCT1216C shares the same base product number and package designation (TO-220-3), indicating full compatibility with existing PCB layouts, thermal management designs, and circuit implementations.

Inventory Availability: The SCT1216C is currently available in production quantities (1047 Pcs New Original In Stock), supporting both new designs and replacement applications.

For applications requiring the SCT1216B, direct substitution with the SCT1216C is supported without circuit redesign or thermal re-analysis.

Frequently Asked Questions (FAQ)

Q: Can the SCT1216C be used as a direct replacement for the SCT1216B?

A: Yes. The SCT1216C is the manufacturer-recommended substitute. Both parts share identical electrical specifications, package type (TO-220-3), and mounting configuration (Through Hole). No circuit modifications are required.

Q: Why is the SCT1216B listed as obsolete?

A: The SCT1216B has been discontinued by SMC Diode Solutions. The SCT1216C represents the active product continuation within the same product family.

Q: Are there any differences in electrical performance between the SCT1216B and SCT1216C?

A: No electrical parameter differences are specified in the manufacturer data. Both parts are standard recovery thyristors with identical voltage, current, and thermal ratings.

Q: What is the significance of the shared base product number (SCT1216)?

A: The base product number indicates both parts belong to the same product family and are designed for equivalent applications. Suffix letters (B, C) denote manufacturing revisions or product lifecycle stages.

Q: Can the SCT1216C be used in existing PCB designs without layout modifications?

A: Yes. The TO-220-3 package and through-hole mounting configuration are identical, allowing direct PCB compatibility without redesign.

Q: Are export control classifications the same for both parts?

A: Yes. Both the SCT1216B and SCT1216C carry identical ECCN (EAR99) and HTSUS (8541.30.0080) classifications.

Q: What is the current inventory status of the SCT1216C?

A: The SCT1216C is available with 1047 Pcs New Original In Stock, supporting immediate procurement for production and maintenance applications.

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