STMicroelectronics LBP01-0803SC5

Overview

LBP01-0803SC5 from STMicroelectronics is a unidirectional LED bypass protection device in SOT23-5L package, designed to shunt current around open-circuit LEDs in high-reliability lighting strings. It features 8–15 V breakdown voltage, 0.35 A DC on-state current rating, 2 V on-state voltage at 0.35 A, and meets IEC 61000-4-2 level 4 (±8 kV contact discharge) and IEC 61000-4-5 (±1 kV/24 A surge) standards. It is deployed in automotive headlights where continuous illumination is safety-critical.

For engineers reviewing the LBP01-0803SC5 datasheet, LBP01-0803SC5 pinout, LBP01-0803SC5 application, or LBP01-0803SC5 equivalent, key selection criteria include bidirectional vs. unidirectional configuration, thermal resistance (140 °C/W), surge immunity compliance, and compatibility with ≤0.35 A LED strings requiring fail-safe current rerouting without system shutdown.

Technical Context

The LBP01-0803SC5 operates as a voltage-triggered thyristor-based bypass switch, activating when forward voltage across a failed LED exceeds its 8–15 V VBO range. Its control circuit integrates overvoltage sensing and latching conduction to maintain current flow through remaining LEDs after an open failure.

It is rated for 0.35 A DC on-state current with 2 V Von at that load, and exhibits dV/dt immunity of 300 V/µs to prevent false triggering during fast transients. Junction temperature range spans −55 °C to +150 °C, supporting operation in under-hood automotive environments.

Key Specifications

Pinout & Package

Package: SOT23-5L (DO-214AC), surface-mount, RoHS-compliant, ECOPACK® grade, 16 mg weight, tape-and-reel packaging (3000 pcs per reel).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LED bypass protection applications.

Compared with NSI45030AZT1G and VOB3120, LBP01-0803SC5 delivers autonomous, latched, surge-hardened bypass in a single SOT23-5L device - eliminating external components, firmware dependency, and AC interface complexity required by alternatives.

Availability

LBP01-0803SC5 is available at Aetrix Electronics and suitable for automotive headlights, traffic lights, and emergency lighting systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for LBP01-0803SC5 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, MCU, power, and sensor solutions for industrial, automotive, and consumer markets.

The LBP01 series belongs to ST's LED protection and reliability product line, engineered specifically to enhance fault tolerance in high-brightness LED lighting systems where safety-critical illumination continuity is mandated.

FAQ

What is the maximum continuous current the LBP01-0803SC5 can shunt without thermal failure?

The LBP01-0803SC5 is rated for 0.35 A DC on-state current in SOT23-5L package. At this current, its 2 V on-state voltage yields 0.7 W dissipation. With 140 °C/W junction-to-ambient thermal resistance and ≤85 °C board temperature, junction temperature remains below 150 °C - the absolute maximum rating.

Does the LBP01-0803SC5 require external bias or control signals to operate?

No. The LBP01-0803SC5 is fully autonomous: it senses overvoltage across its terminals and triggers internal thyristor conduction without any external power, clock, or logic signal. Its gate terminal is internally biased; no external components are needed for basic bypass functionality.

Can the LBP01-0803SC5 be used in bidirectional LED strings?

No. The LBP01-0803SC5 is explicitly unidirectional, as confirmed by ST's datasheet and ordering code "SC5". For bidirectional applications (e.g., AC-driven or polarity-agnostic strings), ST specifies the LBP01-0810B variant in SMB package, which supports symmetrical conduction.

How does the LBP01-0803SC5 behave after an LED failure is repaired?

Once triggered, the LBP01-0803SC5 remains latched in low-Von conduction until string current drops below its holding current (IH = 200 mA). After LED repair and system power cycle, it automatically resets to high-impedance state and resumes monitoring - no manual reset or replacement is required.