Surge Suppression ICs

Part Number	Description / PDF	Quantity
LT4363HDE-1#TRPBF Analog Devices, Inc.	IC SURGE STOPPER HV 12-DFN	0
DPO2039DABQ-13 Zetex Semiconductors (Diodes Inc.)	DATALINE OVER VOLTAGE PROTECTION	2280
TBU-CA065-300-WH J.W. Miller / Bourns	SURGE SUPP TBU 300MA 650VIMP SMD	6385
TPD8S300EVM Texas Instruments	TPD8S300 USB TYPE-C OVERVOLTAGE	226
TBU-DF085-100-WH J.W. Miller / Bourns	SURGE SUPPRESSOR	171
LT4356IMS-3#TRPBF Analog Devices, Inc.	IC SURGE STOPPER ADJ 10-MSOP	1012
LTC4380IDD-2#TRPBF Analog Devices, Inc.	IC LOW CUR SURGE STOPPER 10DFN	0
TBU-PL050-100-WH J.W. Miller / Bourns	SURGE SUPP TBU DL 50OHM 500VIMP	0
LTC4380HMS-2#WTRPBF Analog Devices, Inc.	L Q C SURGE STOPPER	0
LTC4368IMS-1#PBF Analog Devices, Inc.	IC SURGE SUPPRESSION ADJ 10MSOP	1474
TPD3S716QDBQRQ1 Texas Instruments	IC DIODE INTERFACE PROT 16SSOP	284
LT4356MPMS-1#PBF Analog Devices, Inc.	IC SURGE STOPPER ADJ 10-MSOP	870
TBU-PL050-200-WH J.W. Miller / Bourns	SURGE SUPP TBU DL 50OHM 500VIMP	0
TBU-DT065-300-WH J.W. Miller / Bourns	SURGE SUPP TBU DL 300MA 650VIMP	16
LTC7860HMSE#TRPBF Analog Devices, Inc.	HIGH EFFICIENCY SWITCHING SURGE	0
TBU-CA025-200-WH J.W. Miller / Bourns	SURGE SUPP TBU 200MA 250VIMP SMD	0
LT4363IDE-2#PBF Analog Devices, Inc.	IC SURGE STOPPER HV 12-DFN	3562
MAX14572EUD+T Maxim Integrated	IC ADJ OV/OC PROTECTOR 14TSSOP	2827
TPD4S214YFFR Texas Instruments	USB OTG COMPANION DEVICE	2975
TBU-CA050-500-WH J.W. Miller / Bourns	SURGE SUPP TBU 500MA 500VIMP SMD	4803

Surge Suppression ICs

1. Overview

Surge Suppression ICs (Integrated Circuits) are semiconductor devices designed to protect electronic systems from voltage spikes and transient energy disturbances. These devices detect overvoltage conditions and divert excess energy to ground, preventing damage to downstream components. With the proliferation of sensitive electronics in modern applications, surge suppression ICs are critical for ensuring system reliability in environments exposed to lightning strikes, electrostatic discharge (ESD), and switching transients.

2. Main Types and Functional Classification

Type	Functional Characteristics	Application Examples
TVS Diodes (Transient Voltage Suppression)	Fast response time (ps level), low clamping voltage	Communication equipment, USB interfaces
Varistors (MOV)	Voltage-dependent resistance, high surge current handling	Power supplies, industrial control systems
Gas Discharge Tubes (GDT)	High current diversion capability, slow response time	Telecom infrastructure, lightning protection
Silicon Controlled Rectifiers (SCR-based)	Latching behavior, low leakage current	Automotive electronics, motor drives
Hybrid Devices	Combination of multiple suppression technologies	5G base stations, aerospace systems

3. Structure and Composition

Surge suppression ICs typically consist of a semiconductor junction (e.g., silicon or MOV material) sandwiched between metallized contacts. Advanced devices integrate multiple protection stages in a single die, with layers including:

Active protection elements (TVS diodes/SCRs)
Substrate with controlled resistivity
Passivation layer for environmental stability
Standard packages (SOT-23, DFN, TO-220) for PCB mounting

4. Key Technical Parameters

Parameter	Typical Value	Importance
Clamping Voltage (V_clamp)	5V 1000V	Determines protected equipment's stress level
Response Time	0.1ps 1 s	Crucial for high-speed signal line protection
Maximum Pulse Current (I_pp)	1A 50kA	Defines surge handling capability
Working Voltage (V_RWM)	3.3V 600V	Must match system operating voltage
Leakage Current	<1 A	Impacts power efficiency in standby mode

5. Application Fields

Telecommunications (5G base stations, fiber optics)
Consumer Electronics (smartphones, IoT devices)
Industrial Automation (PLCs, robotics)
Automotive (EV charging systems, ADAS)
Renewable Energy (solar inverters, wind turbines)

6. Leading Manufacturers and Products

Manufacturer	Representative Product	Key Features
STMicroelectronics	SM6T Series	6kV surge protection, ultra-low capacitance
ON Semiconductor	NUP4201	Integrated 8-channel ESD protection
Texas Instruments	TPD4E05U06	0.5pF line capacitance for high-speed USB
Littelfuse	SPA05 Series	5kA surge rating in compact SMC package
Semtech	RClamp Series	Auto-recovery function with <1ns response

7. Selection Guidelines

Match working voltage with system requirements
Evaluate peak current specifications against environmental threats
Consider PCB footprint and thermal management
Verify compliance with standards (IEC 61000-4-2, UL 94)
Assess cost-performance balance for volume production

8. Industry Trends

Emerging trends include:

Integration with signal conditioning circuits
Adoption of wide-bandgap materials (SiC/GaN) for higher energy density
AI-powered predictive surge analysis in smart grids
Micron-scale packaging for wearable devices
Increased demand for automotive-grade AEC-Q qualified parts