Buy TVS Diodes in India | Littelfuse Authorized Distributor

Understanding How TVS Diodes Work

In today’s hyperconnected world, electronics are more vulnerable than ever. Whether it’s a smartphone port, an automotive ECU, or a high-speed network switch, a sudden voltage spike—like electrostatic discharge (ESD), lightning strikes, or inductive load switching—can lead to irreversible damage. This results in unexpected downtime, costly repairs, or even total system failures.

The Solution: TVS Diodes – Your Surge Protection Guardians

TVS Diodes (Transient Voltage Suppression Diodes) act as the first line of defense against voltage surges. They are fast-acting semiconductor devices designed to protect sensitive components by clamping excessive voltage to safe levels within nanoseconds.

Whether you’re designing compact consumer devices, rugged automotive electronics, or mission-critical avionics systems, there’s a Littelfuse TVS diode solution for you

What Are TVS Diodes & How Do They Work?.

TVS diodes are special-purpose avalanche/Zener diodes engineered for surge suppression. In normal operation, they present high impedance and allow negligible current flow. However, when voltage spikes exceed the diode’s Breakdown Voltage (V_BR), the diode switches to low impedance mode, conducting heavy current to divert the surge away from sensitive circuits.

Let's break down some key electrical parameters:

Reverse Stand-Off Voltage (V_RWM): This is the maximum voltage that can be applied before the device breaks down.
Clamping Voltage (V_C): This represents the highest voltage that occurs during conduction.
Peak Pulse Power (PPP): This indicates the amount of surge energy that the diode can safely absorb.
Peak Pulse Current (I_PP): This is the maximum current that the diode can handle during a surge condition.

Types & Categories of TVS Diodes

Littelfuse provides a range of TVS diodes designed to meet the specific needs of various applications.

TVS Diode Types – Features and Benefits

TVS Diode Type	Features	Benefits
Surface-Mount	V_R: 3.3 V to 553 V Power Ratings: 200 W to 4 kW Response time: <1 ms RoHS, UL94 V-0 compliant ESD protection up to 30 kV (air/contact)	Space-saving Low inductance Excellent clamping
Leaded	V_R: 5 V to 512 V Power Ratings: 400 W to 1.5 kW Response time: <1 ps UL94 V-0, RoHS, halogen-free	Strong surge capability Easy through-hole mounting Wide compatibility
Automotive	AEC-Q101 qualified Low-profile and low inductance Fast response: <1 ps RoHS & halogen-free	Protection from load-dump and ESD Designed for under-the-hood conditions
High Power	V_R: up to 6.5 kV DC PPP: up to 30 kW I_PP: up to 3 kA Reverse recovery time: <1.2 µs	Industrial strength clamping Foldback technology Compact axial formats
Avionics / Hi-Rel	V_R: 5 V to 345 V Power Ratings: 400 W to 30 kW I_PP: up to 606 A Military-grade screening options	Withstands lightning-level surges Space-saving Foldback clamping Strain relief available

Comparison Table of TVS Diode Types

TVS Diode Comparison Table

Type	Voltage Range	PPP	I_PP	Response Time	Use Cases
Surface-Mount	3.3 V – 553 V	200 W – 4 kW	0.5 A – 326 A	< 1 ms	USB, HDMI, compact PCBs
Leaded	5 V – 512 V	400 W – 1.5 kW	0.5 A – 145 A	< 1 ps	General electronics, industrial
Automotive	Varies (12–24V systems)	—	—	< 1 ps	ECUs, sensors, infotainment
High Power	1.7 kV – 6.5 kV	up to 30 kW	up to 3 kA	< 1.2 µs	Inverters, motors, solar systems
Hi-Rel	5 V – 345 V	400 W – 30 kW	2.2 A – 606 A	< 1 ps	Avionics, aerospace, radar

Selecting the Proper TVS Diode Requires These Steps

To choose the right TVS diode you need to consider the following factors:

System operating voltage requires matching V_R to maximum system voltage levels.
You should match I_PP and PPP to the surge specifications that your system experiences.
For DC lines select unidirectional TVS diodes while bidirectional TVS diodes are suitable for AC and data lines.
Your layout design dictates whether you select between SMD and leaded packages.
For automotive applications AEC-Q101 certification should be checked and for avionics applications MIL specification certification is necessary.

Applications of TVS Diodes

TVS diodes serve in the following areas:

Consumer electronics – Protect USB, HDMI, and power rails.
Automotive systems – Protect ECUs, sensors, infotainment.
Telecom – Protect Ethernet, DSL, antennas, from lightning/ESD.
Industrial & Power – Protect inverters, motor drives, automation controls.
Avionics & Military – Found in radar, fly-by-wire and sensors.

Buy TVS Diodes in India – Littelfuse Authorized Distributor

We are an authorized Littelfuse distributor in India, offering:

Full stock of Surface Mount, Leaded, Automotive, High Power & Hi-REL TVS Diodes
Datasheets, selection guides, and expert application support
RoHS, UL94 V-0, AEC-Q101 and military-grade certified devices

Conclusion

In today’s world, where electronics play a vital role in nearly every industry, TVS Diodes (Transient Voltage Suppression Diodes) have emerged as essential components for ensuring the reliability and longevity of systems. Whether it’s in consumer gadgets, automotive ECUs, telecom networks, or avionics systems, TVS diodes provide unparalleled protection against electrostatic discharge (ESD), lightning strikes, and other transient threats.

As an authorized Littelfuse distributor in India, we proudly offer a diverse selection of Surface Mount, Leaded, Automotive, High-Power, and High-Reliability TVS Diodes. Our commitment to technical expertise, quick delivery, and dependable support sets us apart.

Pantronics India Pvt. Ltd., with a legacy of 50 years, stands as a trusted leader in delivering comprehensive power electronics solutions..

We offer a wide range of power electronics components and systems from top global manufacturers to empower businesses for growth and success. Our products include power semiconductors, resistors, capacitors, fuses, microcontrollers, circuit protection solutions, thermal management systems, testing and measurement solutions, and high voltage and pulse solution

TVS Diodes – FAQ

Frequently Asked Questions (FAQs)

1. What is a TVS diode and why is it used?

A TVS (Transient Voltage Suppression) diode is a semiconductor device that protects electronic circuits from voltage spikes like ESD, lightning, or inductive load switching. It clamps excess voltage and stops damage to sensitive components.

2. Where can I buy Littelfuse TVS diodes in India?

You can buy genuine Littelfuse TVS diodes in India from authorized distributors like Pantronics India Pvt. Ltd. They offer a complete range of surface-mount, leaded, automotive, high-power, and Hi-Rel TVS diodes along with datasheets and expert support.

3. What are the different types of TVS diodes available?

TVS diodes come in several types:

Surface-mount TVS diodes for compact PCB designs
Leaded TVS diodes for general-purpose use
Automotive-grade TVS diodes (AEC-Q101 certified)
High-power TVS diodes for industrial equipment
Hi-Rel TVS diodes for avionics and aerospace systems

4. How do I select the right TVS diode for my application?

To choose the right TVS diode:

Match system voltage with Reverse Stand-Off Voltage (V_RWM)
Match surge current (I_PP) and power rating (PPP)
Use unidirectional for DC and bidirectional for AC/data lines
Ensure AEC-Q101 or MIL-spec compliance for automotive/military use

5. Are Littelfuse TVS diodes suitable for ESD protection?

Yes, Littelfuse TVS diodes are highly effective for ESD protection. Many models offer sub-nanosecond response times and clamping capabilities up to 30 kV.

6. What are the main applications of TVS diodes?

TVS diodes are commonly used in: