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Semiware Semiconductor Inc., 闵行浦江科技园, Shanghai (2026)

03/06/2026

Automotive-grade ESD protection diodes are high-reliability transient voltage suppression devices specifically designed for automotive electronic environments. They are required to meet standards such as AEC-Q101 (Discrete Semiconductors), ISO 10605 (Vehicle ESD Testing), and ISO 7637 (Vehicle Surge Pulses).

I. Product Features

1. High-Level Certification and Reliability

AEC-Q101 Qualified: Having passed rigorous evaluations—including temperature cycling, HTRB (High-Temperature Reverse Bias), TCT (Thermal Shock), and solderability testing—these devices ensure long-term reliability within the automotive operating temperature range of -40°C to +150°C (and up to +175°C for select models).

ISO 10605 ESD Immunity: Typically capable of withstanding contact discharges of ±15kV to ±30kV and air discharges of ±30kV, thereby meeting the ESD testing requirements for automotive modules.

2. Low Clamping Voltage & Fast Response

Response times are typically in the picosecond (ps) range, allowing the device to clamp the voltage before the ESD pulse reaches the protected circuit.

3. Ultra-Low Junction Capacitance (Optimized for High-Speed Signals)

When used with high-speed buses such as CAN FD, Ethernet, LVDS, USB, and HDMI, the junction capacitance typically falls within the following ranges:

General-purpose I/O: 10s to 100s of pF

High-speed differential pairs: ≤1pF (or even as low as 0.2–0.5pF), minimizing signal attenuation and jitter.

4. Multi-Channel / Array Packaging

Available in single-channel, dual-channel, and 4/8-channel ESD array configurations (e.g., SOT-23, SOD-323, DFN, QFN packages).

5. Wide Operating Voltage Range for Automotive Power and Signal Lines

Common operating voltages include:

3.3V / 5V / 12V / 24V (for signal lines or low-power supply rails)

Select models are designed for protection in 24V commercial vehicles or auxiliary power systems.

6. Compliance with Automotive Electrical Environment Requirements

Capable of providing secondary protection in accordance with ISO 7637-2 Pulses 1, 2a, 3a, and 3b (typically used in conjunction with TVS diodes or PPTCs).

Features include high resistance to humidity, sulfurization, and soldering heat. II. Application Areas

1. Body Electronics and Control Units (ECUs)
2. In-Vehicle Bus Interface Protection
3. Infotainment and Smart Cockpit Systems (IVI / Cockpit)
4. ADAS and Sensor Interfaces
5. In-Vehicle Power and Ground Ports (Secondary Protection)
6. LED Lighting and Externally Exposed Interfaces

As a specialized manufacturer of circuit protection devices, Semiware offers a comprehensive range of automotive-grade ESD diode products. To learn more, please visit: https://en.semiware.com/products/automotive-esd-diodes/

02/06/2026

Automotive-grade TVS diodes are overvoltage protection devices specifically designed for automotive electronic environments. The primary distinction between these and standard industrial TVS diodes is the mandatory requirement to pass AEC-Q101 reliability certification and to satisfy the specific "Load Dump" testing requirements outlined in ISO 7637-2 and ISO 16750-2 for in-vehicle applications.

I. Product Features

1. Certification Standards
AEC-Q101 Qualified (Automotive-grade certification for discrete semiconductors)

2. Temperature Range
Tj(max) = 150°C or 175°C; -55°C to +175°C storage/operating temperature range

3. Testing Standards
Compliant with ISO 7637-2 Pulses 1/2a/3a/3b/5a/5b and ISO 16750-2 Load Dump requirements

4. Reliability Requirements
15-year / 240,000 km service life; subjected to rigorous testing protocols including HTRB and thermal cycling

5. Package Types
Primarily available in surface-mount packages such as SMA, SMB, SMC, and DO-218AB (specifically for high-current Load Dump applications)

6. Eco-friendly Processes
Lead-free, halogen-free, MSL Level 1 rated, and compatible with automotive SMT reflow soldering processes

II. Application Areas

1. Load Dump protection for the input terminals of ECUs, BCMs, OBCs, and DC-DC converters
2. Protection for CAN and LIN automotive bus systems
3. High-voltage and BMS protection for New Energy Vehicles (NEVs)
4. Protection for ADAS sensors and high-speed interfaces
5. Protection for various loads such as LED lighting, windshield wipers, power windows, and sensors

As a professional manufacturer of circuit protection devices, Semiware offers a comprehensive range of automotive-grade TVS diode products. For more details, please visit: https://en.semiware.com/products/automotive-tvs-diodes/

01/06/2026

Chip Varistors (also known as Multilayer Chip Varistors or MLVs) are surface-mount device (SMD) components designed for overvoltage protection.

I. Operating Principle

1. Under normal operating voltage: Exhibits high impedance with virtually no leakage current, thereby not interfering with the normal operation of the circuit.

2. When terminal voltage exceeds the Varistor Voltage: Instantly switches to low impedance, absorbing surge energy and clamping the voltage.

3. After the surge subsides: Automatically reverts to high impedance.

II. Product Features

1. Fast Response Speed:
Typically in the nanosecond range (

01/06/2026

An NTC (Negative Temperature Coefficient) thermistor is a semiconductor ceramic component formed by sintering metal oxides such as manganese, cobalt, and nickel. Its core characteristic is that its resistance value decreases exponentially as the temperature rises; conversely, the resistance increases as the temperature falls.

The resistance-temperature relationship is commonly approximated using the β-model: R(T) = R₂₅ × exp[B(1/T − 1/T₂₅)], where R₂₅ represents the nominal resistance value at 25°C, and the B-value denotes the material's thermal sensitivity index. NTC thermistors are primarily used to convert temperature variations into resistance or voltage signals for subsequent processing. Product Features

1. High sensitivity

2. Fast response speed

3. Compact size, robust structure

4. Easy to integrate

5. Excellent long-term stability

Application Areas

1. Temperature Measurement & Monitoring
Electronic thermometers, indoor thermostats, cold chain/server room temperature monitoring, etc.

2. Temperature Compensation
Compensating for parameter drift caused by temperature fluctuations in crystal oscillators, operational amplifiers, transistors, etc., to stabilize circuit performance.

3. Inrush Current Suppression
Connecting an NTC thermistor in series with switching power supplies, LED drivers, or motors during startup; utilizing its high resistance in the cold state to limit capacitor charging inrush currents.

4. Overtemperature Protection & Alarms
Monitoring temperatures in Lithium-ion battery BMS, power amplifier modules, and battery chargers; triggering current reduction or system shutdown upon overtemperature detection.

5. Home Appliance Temperature Control
Closed-loop heating and cooling control for air conditioners, refrigerators, rice cookers, water heaters, etc.

6. Automotive & New Energy
Engine coolant/intake air temperature sensing, battery pack thermal management (BMS), and On-Board Charger (OBC) temperature control.

7. Medical Electronics
High-precision temperature probes for electronic thermometers, ventilators, and dialysis machines.

8. Industrial Automation
PLC temperature control modules, motor winding overheat protection, industrial oven temperature feedback, etc.

As a professional manufacturer of circuit protection devices, Semiware offers a comprehensive range of NTC thermistor products. For more product details, please visit: https://en.semiware.com/products/ntc/

29/05/2026

PPTC (Polymer Positive Temperature Coefficient Thermistor, commonly known as a resettable fuse) is a reusable overcurrent protection component. Its core advantage is automatic recovery after a fault, eliminating the need for replacement. It is widely used for overcurrent/overheat protection in low-voltage electronic circuits.

Working Principle:
1. Low Resistance at Room Temperature: The polymer (such as polyethylene) and conductive particles (carbon black/metal) form a crystalline conductive network with a resistance of only mΩ to 5Ω. When connected in series in a circuit, there is almost no voltage drop.

2. High Resistance During Overcurrent: The Joule heat generated by overcurrent/short circuits causes the polymer to expand, changing from a crystalline to an amorphous state. The conductive network breaks, and the resistance surges to the MΩ level, limiting the current to a safe range.

3. Self-Resetting: After the fault is cleared and cooled, the polymer recrystallizes, the conductive path is rebuilt, and the resistance automatically returns to a low level. It can be cycled thousands of times.

Typical Characteristics:
1. Reusable: Automatic reset after a fault, maintenance-free, and low long-term cost.

2. Low Resistance and Low Power Consumption: Extremely low resistance at normal operating conditions, with negligible impact on the circuit.

3. Small size and multiple packages: Suitable for through-hole, surface mount (0603/0805/1206), and battery cells, compatible with SMT.

4. Dual overcurrent and overheat protection: Sensitive to ambient temperature; automatic IH derating at high temperatures.

Application Areas:
1. Consumer electronics such as chargers, lithium batteries, motherboards, and hard drives
2. Automotive electronics
3. Industrial and communication
4. Industrial fields such as motor drives, power modules, 5G base stations, sensors, and instruments
5. Lighting and smart home

As a professional provider of circuit protection solutions, Semiware offers a full range of resettable fuses. For more information on the PPTC product line, please visit: https://en.semiware.com/products/pptc/

29/05/2026

The SPE/SAE series of electrostatic discharge (ESD) suppressors utilize advanced Polymer technology, featuring extremely low capacitance (0.05pF), leakage current as low as 0.01uA, and ultra-small 0603 or 0402 packages. They help protect sensitive electronic equipment from electrostatic discharge (ESD) damage. They effectively complement integrated circuit chip protection products, especially suitable for low-voltage, high-speed applications where low capacitance is critical. This new technology is highly effective for data ports using high-speed protocols such as USB 2.0, IEEE 1394, HDMI, and DVI.

For more information on the Polymer ESD suppressor product line, please visit: https://en.semiware.com/products/polymer-esd-diodes/

28/05/2026

A high-tech enterprise primarily engaged in the research, development, manufacturing, and marketing of high-reliability circuit protection devices and discrete components. Our products are used in industries such as network communication, automotive electronics, industrial control, security, new energy, and consumer electronics. Additionally, we provide professional circuit protection design and EMC technical services to our customers.

Your Circuit Protection Solutions Provider!

Semiware is seeking global distributors and partners. If you are interested, please contact us at any time. Email: [email protected] or [email protected]

For more contact information, please visit: https://en.semiware.com/contact/

28/05/2026

The DVI (Digital Visual Interface) interface, a commonly used digital interface for video signal transmission, is widely used in industrial, commercial, and consumer electronics products such as computers, monitors, and projectors. Due to its numerous signal pins, intricate structure, and frequent plugging and unplugging with external devices, it is susceptible to electrostatic discharge (ESD). Therefore, a reasonable ESD protection design is required to ensure system reliability and long-term stable operation.

Testing Standard: IEC 61000-4-2 (ESD) ±15kV (air), ±8kV (contact)

Let's explore Semiware's interface protection solutions and circuit protection devices to protect DVI interfaces from surge and ESD interference. https://en.semiware.com/reference-designs/dvi/

27/05/2026

Because the current and voltage generated by solar panels are direct current (DC), which cannot meet the demands of the power grid or some AC loads, photovoltaic (PV) inverters play a crucial role in solar photovoltaic (PV) systems. PV inverters typically have multiple protection functions, such as overvoltage protection, undervoltage protection, and overtemperature protection, to protect both the solar panels and the inverter itself.

Let's learn about Semiware's interface protection solutions and protection devices to keep PV inverters free from surge and electrostatic discharge (ESD) interference. https://en.semiware.com/applications/pv-inverter/

26/05/2026

The E-bike integrates IoT, ECU intelligent central controller, and cycling data algorithm analysis. Its more intelligent design makes the electric vehicle more functional, but at the same time, it requires higher requirements for circuit design.

Let's explore together the application of Semiware's high-quality circuit protection and power devices in electric bicycles.

https://en.semiware.com/applications/e-bike/

Let's explore together the applications of Semiware's high-quality circuit protection and power devices in e-bikes.

Semiware Semiconductor Inc.

03/06/2026

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