company blog about Recycle ST Rad-Hard Discretes:Bipolar Transistors,Diodes And Rectifiers,Power MOSFETs

Recycle ST Rad-Hard Discretes:Bipolar Transistors,Diodes And Rectifiers,Power MOSFETs

Shenzhen Mingjiada Electronics Co., Ltd., as a leading enterprise in the electronic component recycling industry, provides comprehensive recycling solutions through professional services, competitive pricing and a principled business philosophy.

[Recycling Advantages]

1. Product Categories

We specialise in all types of mainstream original manufacturer components. We only accept genuine, brand-new products sourced through authorised channels and in full working order; we do not accept counterfeit or substandard products, components salvaged from dismantled equipment, products of unknown origin, or severely damaged items.

Comprehensive brand portfolio: covering leading international manufacturers and top domestic brands; model compatibility spans consumer, industrial and automotive applications.

Diverse inventory types: factory surplus stock, project surplus stock, over-purchased stock, goods compliant with customs regulations, port return stock and complete warehouse clearances; we support bulk and full-container recycling, whilst also accepting small batches of high-quality stock.

2. Condition and Testing Standards

Packaging requirements: Priority is given to products with original boxes, tubular packaging or vacuum-sealed packaging, accompanied by complete batch numbers. Bulk products must undergo X-ray inspection and functional testing to confirm wafer layer integrity and ensure there is no physical damage, corrosion or oxidation.

Data security compliance: Standardised data erasure procedures are carried out on chips/modules with storage functions, accompanied by erasure reports, to prevent the leakage of customer information.

Tiered Pricing System: Products are categorised into four grades: ‘Brand New, Unopened > Unused, Opened > Tested and Approved > Repairable Materials’; pricing is dynamically adjusted based on real-time global market conditions, model scarcity, year of manufacture and market demand.

3. Recycling Service Scenarios

Global Coverage: We support cross-border delivery, door-to-door collection and global logistics tracking; settlement is available in multiple currencies.

Flexible Transaction Models: Cash on delivery (settlement within 24–48 hours), consignment sales, inventory warehousing and bulk warehouse clearance; meeting customers’ diverse needs in terms of cash recovery and inventory management.

Channel Legitimacy: We collaborate exclusively with authorised distributors, original equipment manufacturers (OEMs) and compliant traders; we refuse to accept goods from illegal channels, smuggled goods or infringing sources; and we clearly define the obligations of both parties through compliance agreements.

I. Radiation-Hardened Bipolar Transistors

ST’s radiation-hardened bipolar transistors are current-controlled discrete devices specifically designed for high-reliability radiation environments. Optimised and upgraded using mature semiconductor manufacturing processes, they thoroughly resolve the pain points associated with standard bipolar transistors in radiation environments—such as current gain attenuation, surge in leakage current and deterioration of switching characteristics—and are primarily used in applications such as signal amplification, precision switching and reference circuit driving in aerospace equipment.

In terms of radiation tolerance, ST’s radiation-hardened bipolar transistors feature a specialised radiation-hardened design that effectively suppresses parameter drift caused by Total Ionising Dose (TID) radiation, whilst significantly enhancing resistance to Single-Event Transients (SET) and Single-Event Upsets (SEU), ensuring excellent long-term operational parameter stability whilst in orbit. These devices retain the core advantages of traditional bipolar transistors—low noise, high precision and good linearity—whilst optimising the consistency of saturation voltage drop and current gain in radiation environments. With excellent high-frequency response characteristics, they cover a diverse range of applications, including medium-frequency signal processing and precision analogue circuit control, and are widely used in satellite telemetry and control systems, aviation avionics and military precision instruments.

II. Radiation-Hardened Diodes and Rectifiers

The ST range of radiation-hardened diodes and rectifiers comprises sub-categories such as radiation-hardened Schottky diodes, general-purpose rectifier diodes and high-voltage rectifiers. These are core components for power rectification, reverse voltage regulation, circuit protection and freewheeling clamping in radiation environments, specifically addressing failure issues associated with standard diodes in such conditions—such as increased reverse leakage current, reduced breakdown voltage and deteriorated recovery characteristics.

This product range has also obtained the authoritative ESCC aerospace certification. Utilising highly reliable hermetically sealed ceramic packages, these components demonstrate exceptional environmental adaptability and can withstand prolonged exposure to space ionising radiation and high-energy particle impacts. Among these, the core radiation-hardened Schottky diodes are ST’s flagship products. Manufactured using specialised hardening processes, they feature an extremely low forward voltage drop and a near-zero reverse recovery time. Their switching speed far exceeds that of conventional rectifier devices, significantly enhancing the conversion efficiency of power supply systems under radiation conditions. With an operating voltage range spanning 15 V to 200 V, they are suitable for rectification applications ranging from small to medium power and medium to large power.

Compared to standard industrial-grade rectifiers, ST’s radiation-hardened rectifiers have been structurally optimised to effectively reduce the increase in leakage current caused by total ionising dose radiation. They are resistant to breakdown failure under single-particle impacts, whilst maintaining stable voltage regulation accuracy and rectification efficiency over the long term. The products combine high reliability with broad adaptability; they can be used for rectification, filtering and freewheeling protection in aerospace power modules, as well as in circuit protection systems for military high-energy equipment and deep-space exploration instruments. They are capable of maintaining low-loss, highly stable operation in long-term, high-radiation environments, significantly reducing the probability of equipment failure and maintenance costs.

III. Radiation-Hardened Power MOSFETs

ST’s radiation-hardened power MOSFETs are voltage-controlled power devices developed for high-end aerospace power conversion applications. Manufactured using STMicroelectronics’ proprietary STripFET™ hardening process, they represent the category with the highest power handling capability and the widest range of operating conditions among the three types of discrete devices. They are primarily used in aerospace power switches, motor drives and high-power energy conversion systems.

The product range covers the two mainstream types—N-channel and P-channel—and features excellent electrical performance parameters, with a breakdown voltage of up to 100 V, a maximum continuous drain current of 48 A, and a maximum on-resistance as low as 30 mΩ, combining high power handling capability with low loss characteristics. In terms of core radiation resistance, the two channel types offer distinct performance profiles: the N-channel version can withstand a total ionising radiation dose of 50 krad, whilst the P-channel version offers even greater radiation tolerance, reaching 100 krad. Both versions also possess excellent resistance to single-particle gate breakdown and single-particle burnout, enabling them to withstand the instantaneous impact of high-energy particles in space.

In terms of packaging, this series of devices offers a variety of highly reliable packaging options, including hermetically sealed SMD.5, through-hole TO-254AA and TO-257AA packages, whilst also supporting bare die supply, meeting the design requirements for miniaturisation and high-density integration in aerospace equipment. Compared to conventional power MOSFETs, ST’s radiation-hardened power MOSFETs exhibit no significant on-resistance drift or switching frequency degradation in radiation environments. They feature stable switching characteristics, low gate charge and minimal power loss, enabling high-frequency, high-efficiency power conversion. These devices are currently widely used in core applications such as satellite power systems, space propulsion drive systems, power supplies for deep-space exploration payloads, and high-end military power electronic equipment, serving as the core power switching devices in high-power aerospace electronic systems.

IV. Summary of Core Common Advantages and Applications

ST’s three major categories of radiation-hardened discrete devices all adhere to aerospace-grade R&D and production standards, offering outstanding core common advantages: the entire range has passed ESCC aerospace certification, whilst bipolar transistors additionally comply with JANS/JANSR military standards, ensuring authoritative and reliable quality; All devices utilise hermetically sealed ceramic packages, offering resistance to vibration, high temperatures and corrosion, and are suited to extreme space environments; they feature specialised radiation-hardened designs that effectively counteract device failures caused by total ionising dose (TID) radiation and single-event effects, ensuring stable operating parameters over an exceptionally long service life.

The three types of devices complement one another functionally and provide comprehensive coverage: bipolar transistors specialise in precision signal processing and low-power switching; diodes and rectifiers focus on circuit rectification, voltage regulation and protection; whilst power MOSFETs handle high-power, high-efficiency energy conversion. This combination meets the circuit design requirements for various high-radiation scenarios in the aerospace and defence sectors. With over forty years of experience in space applications, the company has become a leading global supplier of core discrete components for high-end, high-reliability electronic systems.