Product Overview

The TBU-DF085-300-WH is a high-performance dual bidirectional Electronic Current Limiter (ECL) utilizing MOSFET semiconductor technology, designed to protect circuits from short circuits, overvoltage transients, and battery cell faults. Housed in a compact DFN surface-mount package, it offers 850V peak impulse voltage withstand capability and a 300-600mA trigger current range, operating stably across -55℃~+125℃. Ideal for telecommunication and industrial communication applications requiring robust reliability.

Key Features

Robust Surge Protection: Withstands 850V peak impulse voltage (＜10ms duration) and 425V continuous AC voltage, effectively blocking surges to safeguard sensitive electronics.
Rapid Overcurrent Response: Features a 300-600mA trigger current range with a response time of ＜1μs, quickly limiting current to safe levels during transient events.
Wide Temperature Range & Reliability: Operates from -55℃ to +125℃, suitable for harsh environments, and is RoHS compliant for lead-free soldering processes.
Low Capacitance & High-Speed Performance: Minimal parasitic capacitance ensures interference-free high-speed signal transmission, perfect for protecting high-frequency communication lines.
Compact Package & Easy Integration: DFN surface-mount design saves PCB space and supports automated assembly, enhancing production efficiency.

Technical Specifications

Item	Parameters
Model	TBU-DF085-300-WH
Protection Type	Dual Bidirectional High-Speed Overcurrent/Surge Protection
Peak Impulse Voltage (Vimp)	850V (＜10ms duration)
Continuous AC Voltage (Vrms)	425V
Trigger Current (Itrigger)	300mA (Min) / 450mA (Typ) / 600mA (Max)
Device Resistance (Rdevice)	15-26Ω (@Vimp=850V, Itrigger Min)
Response Time (tblock)	≤1μs
Operating Temperature	-55℃~+125℃
Storage Temperature	-65℃~+150℃
Package Type	DFN Surface Mount (SMT)
Environmental Compliance	RoHS 2015/863 Compliant
Soldering Temperature	260℃ Peak (Reflow, ≤10s)

Typical Applications

Telecom & Data Communications: Deployed in high-speed signal interfaces of switches and routers to protect Ethernet and optical modules from surges and overcurrent, ensuring stable communication.
Industrial Control Systems: Used in power and signal lines of PLCs and sensor networks to prevent EMI and sudden overcurrent from damaging control circuits in industrial environments.
Consumer Electronics: Integrated in charging interfaces and battery management circuits of smartphones and tablets to protect against short circuits and overvoltage.
Renewable Energy Systems: Safeguards DC inputs/outputs of solar inverters and energy storage devices, resisting lightning surges and current anomalies for improved system reliability.
Automotive Electronics: Suitable for in-vehicle communication buses (CAN/LIN) and sensor circuits, withstanding harsh temperatures and voltage fluctuations to ensure driving safety.

Why Choose TBU-DF085-300-WH？

Dual Protection Mechanism: Combines overcurrent limiting and surge blocking to cover multiple fault scenarios, reducing system failure risks.
Fast Response & Low Latency: 1μs-level response speed promptly cuts off abnormal currents, protecting sensitive components from transient high voltage.
Wide Temperature Adaptability & Compatibility: Operates across -55℃~+125℃ for industrial-grade environments and supports lead-free reflow soldering for simplified manufacturing.
Compact Design & High Integration: DFN package is space-efficient for dense PCB layouts, supporting dual-channel independent protection to reduce component count.
Global Compliance & Reliability: RoHS certified for environmental safety and rigorously tested for temperature cycling and shock, ensuring long-term stable performance.

SUNTOP COMPANY INTRODUCTION

Founded in 2000, Suntop is one of the leading global distributors of electronic
components, dedica ted to providing comprehensive procurement and supply chain services to the global electronics manufacturing industry. Our services include distribution, spot trading, PPV cost-saving projects, and inventory management. We not only offer high-quality products but also strive to assist our clients in achieving optimal solutions with minimal time and cost.
As a trusted partner for numerous OEMs, ODMs, CEMs, and EMS companies worldwide, our professional team manages millions of component records from thousands of trading partners across dozens of countries daily through our company database. We maintain close business relationships with major factories and distributors in North America, Europe, and Asia to ensure that our clients stay ahead in a highly competitive market.

SUNTOP’s mode of transportation

UPS

One of the largest package delivery companies globally, with a robust ground network. Offers specialized services like supply chain management and healthcare logistics, covering 200+ countries/regions.

DHL

Leads in global international express market share, with a dominant position in Europe. Specializes in cross-border logistics, bulk cargo, and document delivery. Divisions include DHL Express and DHL Supply Chain.

TNT

Formerly known for its European road network and time-definite delivery services. Now integrated into FedEx’s operations to enhance its European market presence.

SF

China’s largest integrated logistics provider, known for high-speed delivery and a direct-operated business model. Covers domestic and key international markets, offering services like cold chain logistics, supply chain solutions, and air cargo (with its own freighter fleet).

Fedex

Fedex is an international express delivery group that offers overnight express delivery, ground express delivery, heavy cargo transportation, document copying and logistics services.

TBU-DF085-300-WH