TVS - Diodes

Part Number	Description / PDF	Quantity
UCLAMP0504A.TCT Semtech	TVS DIODE 5V 12V SC89-6	5344
UCLAMP1201H.TCT Semtech	TVS DIODE 12V 25V SOD523	12367
SMF12.TCT Semtech	TVS DIODE 12V 25V SC70-5	0
SM15.TCT Semtech	TVS DIODE 15V 24V SOT23-3	13166
LCDA24C-1.TCT Semtech	TVS DIODE 24V 50V SOT143-4	17942
SMDA24C-5.TBT Semtech	TVS DIODE 24V 43V 8SO	559
1N6121AUS Semtech	TVS DIODE 32.7V 59.1V	0
RCLAMP0821P.TCT Semtech	TVS DIODE 8V 25V SLP1006P2	8090
JTXV1N6136 Semtech	T MET BI 500W 180V	0
JAN1N6102US Semtech	TVS BI 500W 6.12V SM	0
JTX1N6105A Semtech	T MET BI 500W 9V1	0
JTXV1N6152US Semtech	TVS BI 1500 W 24.3V SM	0
JTXV1N6108A Semtech	T MET BI 500W 12V	0
1N6102 Semtech	TVS DIODE 5.2V 11V AXIAL	0
1N6144A Semtech	TVS DIODE 9.1V 16.9V AXIAL	0
JTX1N6156A Semtech	T MET BI 1500W	0
JTXV1N6467 Semtech	TVS	0
JTX1N6118A Semtech	T MET BI 500W 33V	0
JTX1N6143AUS Semtech	T MET BI 1500W 11V SM	0
JTXV1N6169AUS Semtech	T MET BI 1500W 130V SM	0

TVS - Diodes

1. Overview

Transient Voltage Suppression (TVS) Diodes are semiconductor devices designed to protect sensitive electronics from voltage spikes caused by ESD (electrostatic discharge), lightning, or switching events. By clamping transient voltages to safe levels, TVS diodes ensure circuit reliability in modern electronic systems. Their fast response time (<1ps) and low clamping voltage make them critical components in high-speed data lines, power supplies, and automotive electronics.

2. Main Types and Functional Classification

Type	Functional Features	Application Examples
Unidirectional TVS	Single-polarity protection, asymmetrical voltage response	DC power lines, automotive systems
Bidirectional TVS	Symmetrical protection for AC signals	Telecom interfaces (e.g., RJ45), USB 3.0	Multichannel TVS	Multiple protection paths in single package	HDMI ports, DisplayPort interfaces	Automotive TVS	AEC-Q101 qualified, high surge capability	ECU modules, CAN bus protection

3. Structure and Composition

TVS diodes utilize a PN junction semiconductor structure with optimized doping profiles. Key components include:

Silicon epitaxial layer for precise voltage control
Passivation layer (SiO2/Nitride) to reduce leakage current
Backside metallization for low-inductance packaging
DO-214, SOD-123, or WCSP packaging variants

4. Key Technical Specifications

Parameter	Description	Importance
Breakdown Voltage (Vbr)	Minimum voltage where TVS activates	Determines protection threshold
Clamping Voltage (Vc)	Max voltage during transient event	Must be below protected IC's max rating
Peak Pulse Current (Ipp)	Maximum surge current handling	Defines robustness against large transients
Response Time (tresp)	Time to switch from off to on state	Crucial for ESD protection (typically <1ps)
Leakage Current (Ir)	Off-state current at working voltage	Impacts power efficiency

5. Application Areas

Major industries and typical equipment:

Telecommunications: 5G base stations, optical transceivers
Automotive: CAN/LIN bus protection, ADAS sensors
Industrial: PLCs, motor drives
Consumer Electronics: USB Type-C interfaces, Wi-Fi modules
Renewable Energy: Solar inverters, wind turbine controllers

6. Leading Manufacturers and Products

Manufacturer	Product Series	Key Features
Littelfuse	SP301x Series	USB 3.1 Gen2 protection, 0.35pF capacitance
ON Semiconductor	NUP41060	6-channel ESD protection, 30kV HBM
STMicroelectronics	ESDA8401	Automotive-grade, 150A surge rating
Infineon	ESD320	Single-line protection, 0.25pF for HDMI 2.1

7. Selection Guidelines

Key considerations:

Operating voltage must be below Vbr (typically 1.1 Voper)
Clamping voltage should stay under protected IC's maximum ratings
Packaging selection based on board space and thermal requirements
Environmental factors: temperature range, humidity resistance
Compliance with standards (IEC 61000-4-2, ISO 10605)

Example: For a 12V automotive circuit, select a bidirectional TVS with Vbr=15V, Vc<30V, and Ipp>50A to handle load dump events.

8. Industry Trends

Key development directions:

Miniaturization: 0201 package (0.6 0.3mm) for mobile devices
Integration: Combo devices with filters and shielding
Higher robustness: 40kV+ ESD protection for industrial IoT
Advanced materials: Silicon carbide (SiC) for high-temperature applications
AI-driven selection tools for optimized component matching