STMicroelectronics ESDLIN03-1BWY

Overview

ESDLIN03-1BWY from STMicroelectronics is an automotive-grade bidirectional transient voltage suppressor (TVS) designed specifically for ESD and overvoltage protection of LIN bus lines. It features a 26.5 V stand-off voltage, 250 W peak pulse power (8/20 µs), ±30 kV ISO 10605 ESD immunity, -39 V / +39 V clamping under ISO 7637-3 pulses, and 3.5 pF junction capacitance - enabling robust signal integrity on low-speed automotive serial buses.

For engineers reviewing the ESDLIN03-1BWY datasheet, ESDLIN03-1BWY pinout, ESDLIN03-1BWY application, or ESDLIN03-1BWY equivalent, this device delivers AEC-Q101-qualified, ECOPACK®2-compliant single-line protection optimized for LIN physical layer compliance, low-leakage operation at 24 V systems, and minimal capacitive loading to preserve bus timing margins.

Technical Context

The ESDLIN03-1BWY implements a silicon avalanche diode structure in a bidirectional configuration, enabling symmetrical clamping for both positive and negative transients on LIN bus lines. Its low 3.5 pF capacitance at 0 V ensures minimal signal distortion on 19.2–20 kbps LIN waveforms, while its 9 × 10⁻⁴/°C voltage temperature coefficient maintains stable breakdown behavior across -55 °C to +175 °C junction temperatures.

It meets ISO 7637-3 Pulse 3a (-150 V) and Pulse 3b (+100 V) requirements with clamping voltages of -39 V and +39 V respectively, and achieves ±30 kV contact/air discharge per ISO 10605 using both 150 pF/330 Ω and 330 pF/330 Ω test networks - confirming suitability for harsh automotive environments without external filtering.

Key Specifications

Pinout & Package

ESDLIN03-1BWY is housed in a compact, lead-free SOT323-3L package (JEDEC TO-236AB), measuring 2.0 mm × 1.25 mm × 0.9 mm (max), UL94 V0 compliant, and optimized for automated PCB assembly with tape-and-reel delivery (3000 pcs/reel).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ESDLIN03-1BWY, ESDALC6V1-1U2 offers lower voltage rating but insufficient stand-off for LIN, while SM712 provides asymmetric clamping unsuited for LIN's balanced signaling and lacks automotive qualification - making ESDLIN03-1BWY the only AEC-Q101-compliant, bidirectional, low-capacitance solution optimized for LIN bus voltage and timing constraints.

Availability

ESDLIN03-1BWY is available at Aetrix Electronics and suitable for automotive body electronics, LIN-based sensor networks, and diagnostic interface designs requiring stable component supply, AEC-Q101 assurance, and production-ready tape-and-reel packaging.

Supply support for ESDLIN03-1BWY 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 microcontrollers, power management ICs, analog chips, and discrete protection devices for automotive, industrial, and consumer markets.

The Transil™ TVS product line delivers high-reliability, application-specific surge protection components - with ESDLIN03-1BWY engineered exclusively for LIN bus compliance, low-capacitance signal preservation, and full AEC-Q101 validation.

FAQ

What is the maximum operating temperature range for ESDLIN03-1BWY?

The ESDLIN03-1BWY supports an operating junction temperature range of -55 °C to +175 °C, verified per AEC-Q101 stress testing. This enables deployment in under-hood modules (e.g., engine bay LIN sensors) and high-ambient-cabin applications without derating. Thermal performance is validated up to 175 °C with no parameter shift beyond specification limits.

Does ESDLIN03-1BWY require external series impedance for LIN bus protection?

No external series resistor or ferrite bead is required. The device's 3.5 pF capacitance and low dynamic impedance ensure minimal impact on LIN signal integrity at 20 kbps. ST's reference design places it directly across the LIN line and ground, with no added passive components - simplifying layout and reducing BOM cost.

How does ESDLIN03-1BWY perform under ISO 7637-3 Pulse 3a and 3b?

Under ISO 7637-3 Pulse 3a (-150 V), ESDLIN03-1BWY clamps to -39 V; under Pulse 3b (+100 V), it clamps to +39 V. These values are measured per standard test conditions and guarantee downstream LIN transceivers remain within absolute maximum ratings. Clamping occurs within <1 ns, limiting energy transfer to protected circuitry.

Is ESDLIN03-1BWY compatible with lead-free reflow processes?

Yes - ESDLIN03-1BWY uses an ECOPACK®2 lead-free package qualified for standard Pb-free reflow profiles per IPC/JEDEC J-STD-020. Its SOT323-3L outline supports peak temperatures up to 260 °C, and ST provides a recommended reflow profile (Figure 15) with controlled ramp rates and soak zones to prevent solder joint voiding or package cracking.