Key facts
- Model
- ST300S
- Industry
- Industrial
- Documents
- 4
- Languages
- EN
- Last added
- 2012-06-15
Start here

International Rectifier ST300S Series Phase Control Thyristors Datasheet
This document provides technical specifications, electrical characteristics, and thermal data for the International Rectifier ST300S Series Phase Control Thyristors. The devices are designed with a center amplifying gate and feature a hermetic metal case with ceramic insulator in a TO-209AE (TO-118) package.
Key ratings include a maximum average on-state current of 300 A at a case temperature of 75 °C. The thyristors support various voltage ratings from 400 V to 2000 V and are intended for applications such as DC motor controls, controlled DC power supplies, and AC controllers.
International Rectifier ST300S specifications
| Max. average on-state current | 300 A |
|---|---|
| Max. RMS on-state current | 470 A |
| Operating temperature range | -40 to 125 °C |
| Case style | TO-209AE (TO-118) |
| Mounting threads | UNF 3/4 - 16UNF2A or ISO M24x1.5 |
Source: International Rectifier ST300S Series Phase Control Thyristors Datasheet
All International Rectifier ST300S documents by type
Ratings, dimensions and ordering codes, for selection and design work.
- International Rectifier ST300S Series Phase Control Thyristors Datasheet 8 p
- International Rectifier ST300S Series Phase Control Thyristors Datasheet 8 p
- International Rectifier ST300S Series Phase Control Thyristors Datasheet 8 p
- International Rectifier ST300S Series Phase Control Thyristors Datasheet 8 p
Questions answered in these manuals
What is the maximum average on-state current for these thyristors?
The maximum average on-state current is 300 A.
From: International Rectifier ST300S Series Phase Control Thyristors Datasheet
What is the maximum non-repetitive surge current at 50 Hz?
The maximum non-repetitive surge current is 8000 A.
From: International Rectifier ST300S Series Phase Control Thyristors Datasheet
What are the typical applications for the ST300S Series?
Typical applications include DC motor controls, controlled DC power supplies, and AC controllers.
From: International Rectifier ST300S Series Phase Control Thyristors Datasheet
What is the case style for these thyristors?
The devices use a hermetic metal case with a ceramic insulator in the TO-209AE (TO-118) style.
From: International Rectifier ST300S Series Phase Control Thyristors Datasheet
What is the maximum operating temperature range for this thyristor?
The unit operates safely within a junction temperature range of -40 to 125 °C.
From: International Rectifier ST300S Series Phase Control Thyristors Datasheet
What is the maximum thermal resistance from the junction to the case?
The maximum thermal resistance between the junction and the case is 0.10 K/W during DC operation.
From: International Rectifier ST300S Series Phase Control Thyristors Datasheet
