STMicroelectronics ESDLIN1524BJ

Overview

ESDLIN1524BJ from STMicroelectronics is an asymmetrical bidirectional TVS diode engineered for ESD and transient protection of LIN and CXPI automotive buses. It features ±30 kV IEC 61000-4-2 contact/air discharge immunity, 24 V forward stand-off (pin 2→1), 15 V reverse stand-off (pin 1→2), 160 W peak pulse power (8/20 µs), and 16–20 pF junction capacitance at 0 V - enabling low-distortion signal integrity in 19.2 kbps LIN networks.

For engineers reviewing the ESDLIN1524BJ datasheet, ESDLIN1524BJ pinout, ESDLIN1524BJ application, or ESDLIN1524BJ equivalent, key selection criteria include asymmetric voltage clamping (V_CL = 40 V @ 1 A, 25 V @ 1 A), AEC-Q101 qualification, SOD323 footprint compliance with IPC7531, and ISO 17987-7 / SAE J3076 bus-specific surge resilience.

Technical Context

This device implements dual-directional clamping with distinct breakdown thresholds: 27.8 V typ. (25.4–30.3 V) from pin 2 to pin 1, and 18.9 V typ. (17.2–20.3 V) from pin 1 to pin 2 - matching LIN bus polarity requirements under reverse battery (−15 V) and jump-start (+24 V) conditions per ISO 16750-2. Its 50 nA max leakage at rated stand-off ensures minimal impact on bus DC bias.

Clamping performance is thermally compensated via temperature coefficients α_T = 9.6×10⁻⁴/°C (24 V side) and 8.8×10⁻⁴/°C (15 V side), enabling stable V_BR and V_CL across −40 °C to +150 °C operating junction range. Capacitance remains ≤20 pF up to 15 V line voltage, preserving signal rise/fall times in low-speed serial interfaces.

Key Specifications

Pinout & Package

The ESDLIN1524BJ is housed in a JEDEC-registered SOD323 surface-mount package (1.52–1.80 mm × 1.11–1.45 mm × 0.93–1.01 mm height), optimized for high-density automotive PCBs and compatible with IPC7531 footprints.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar asymmetrical automotive bus ESD protection applications.

Compared with ESDAXL5-1BF3 and TPD2E001DRYR, the ESDLIN1524BJ uniquely delivers automotive-grade asymmetric clamping (15 V / 24 V), ±30 kV ESD immunity, and full ISO 17987-7 alignment - making it the only qualified solution for direct LIN/CXPI bus-line protection without design compromises.

Availability

ESDLIN1524BJ is available at Aetrix Electronics and suitable for automotive LIN bus nodes, CXPI sensor interfaces, body control module gateways, and smart actuator designs requiring stable component supply across multi-year production cycles.

Supply support for ESDLIN1524BJ 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, specializing in automotive, industrial, and power management ICs with vertical manufacturing and rigorous AEC-Q100/101 validation.

The ESDLIN1524BJ belongs to ST's automotive-grade ESD protection portfolio, designed explicitly for LIN and CXPI physical layer resilience - addressing the need for single-component, asymmetric, high-energy transient suppression in modern vehicle networks.

FAQ

What is the maximum clamping voltage for ESDLIN1524BJ during a 1 A ESD event?

The clamping voltage is 40 V from pin 2 to pin 1 and 25 V from pin 1 to pin 2 under 1 A, 8/20 µs pulse conditions. These values are measured at 25 °C and scale with junction temperature using α_T coefficients of 9.6×10⁻⁴/°C and 8.8×10⁻⁴/°C respectively - critical for thermal derating in under-hood environments.

Can ESDLIN1524BJ be used on CAN bus lines?

No - ESDLIN1524BJ is optimized for LIN (19.2 kbps) and CXPI (20 kbps) signaling with 15 V/24 V asymmetry and ≤20 pF capacitance. CAN FD requires lower capacitance (<5 pF) and higher clamping precision; ST recommends SM712 or ESDALC6V1-1BF4 for CAN physical layer protection.

Is the SOD323 package compatible with standard reflow profiles?

Yes - the device is qualified to JEDEC J-STD-020 MSL level 1 and supports ST's recommended reflow profile: peak temperature 240–245 °C, ramp rate ≤3 °C/s, and time above 210 °C limited to 60–90 seconds. Halide-free, "no-clean" solder paste with 20–38 µm particles is required.

Does ESDLIN1524BJ require external components for basic LIN protection?

No - its asymmetrical configuration eliminates the need for series resistors or additional diodes. It connects directly between LIN bus line (pin 1) and ground (pin 2), providing complete ISO 10605, ISO 16750-2, and ISO 7637-3 compliance in a single passive component.