onsemi ESDR0502BT1G

Overview

ESDR0502BT1G from onsemi is an ultra-low-capacitance ESD protection diode designed for bidirectional or dual unidirectional signal line protection in high-speed interfaces. It delivers 0.5 pF typical capacitance (0.25 pF effective in bidirectional mode), 5 V stand-off voltage, <1.0 ns response time, and IEC61000-4-2 Level 4 (±9 kV contact) ESD immunity-enabling robust protection of USB 2.0 high-speed and antenna lines without signal degradation.

For engineers reviewing the ESDR0502BT1G datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage (0.45 V max @ 1 A), low leakage (<1.0 µA @ 5 V), SC-75 package footprint (1.60 mm × 0.80 mm), and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

The ESDR0502BT1G employs a dual-cathode, single-anode configuration in SC-75 package to support either two unidirectional lines (pin1–pin3 and pin2–pin3) or one bidirectional line (pin1–pin2), with capacitance measured at 1 MHz and 0 V bias. Its clamping behavior is characterized per IEC61000-4-2 waveform, delivering ≤0.45 V clamping voltage at 1 A peak pulse current.

It meets ISO10605 (330 pF/2 kΩ ±17 kV contact) and achieves 20 W peak surge power handling with 2.0 A peak surge current (8/20 µs). Junction temperature range spans −55°C to +150°C, and it is Pb-free, MSL 1 compliant, and qualified to AEC-Q101 for automotive use.

Key Specifications

Pinout & Package

ESDR0502BT1G uses the SC-75 (Case 463, Style 4) surface-mount package with three terminals: two cathodes and one anode. The compact 1.60 mm × 0.80 mm outline and 0.80 mm height enable dense routing in RF and high-speed digital layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPD2E001DRYR and SP1001-01UTG, the ESDR0502BT1G uniquely balances ultra-low capacitance (0.5 pF), high surge capability (20 W), and AEC-Q101 qualification-making it optimal for automotive and high-speed consumer interfaces where both signal fidelity and ruggedness are required.

Availability

ESDR0502BT1G is available at Aetrix Electronics and suitable for USB 2.0 high-speed interfaces, cellular antenna lines, and automotive infotainment displays requiring stable component supply and long-term lifecycle support.

Supply support for ESDR0502BT1G 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient innovation for automotive, industrial, cloud, and IoT applications.

The ESDR0502BT1G belongs to onsemi's ultra-low-capacitance ESD protection diode family, engineered specifically for high-frequency signal integrity preservation in USB, HDMI, antenna, and MIPI interfaces.

FAQ

What is the maximum clamping voltage of ESDR0502BT1G under IEC61000-4-2 testing?

The ESDR0502BT1G exhibits a maximum clamping voltage of 0.45 V at 1 A peak pulse current per IEC61000-4-2 waveform. This value is measured across the device during standardized ESD events and ensures minimal overvoltage exposure to protected ICs. The low clamping level is achieved through optimized silicon geometry and low dynamic resistance, making ESDR0502BT1G especially effective for safeguarding voltage-sensitive transceivers and PHY layers in high-speed designs.

Can ESDR0502BT1G protect both unidirectional and bidirectional signal lines?

Yes, ESDR0502BT1G supports dual configurations: it can protect two unidirectional lines (e.g., pin1–pin3 and pin2–pin3) or one bidirectional line (pin1–pin2). In bidirectional mode, its effective capacitance drops to 0.25 pF-critical for differential interfaces like USB 2.0. This flexibility is enabled by its internal dual-cathode/single-anode structure, and the configuration is determined solely by PCB routing, not part variant or marking.

Is ESDR0502BT1G suitable for automotive applications?

Yes, ESDR0502BT1G is AEC-Q101 qualified and PPAP capable, meeting stringent automotive reliability requirements including operating temperature from −55°C to +150°C junction, robust ESD immunity (±9 kV contact), and Pb-free reflow compatibility. It is widely deployed in automotive infotainment, telematics, and ADAS subsystems where signal integrity and long-term field reliability are essential-confirming ESDR0502BT1G as a validated solution for vehicle-grade designs.

What is the thermal performance of ESDR0502BT1G on a standard FR-5 board?

On an FR-5 board (1.0 × 0.75 × 0.62 in.), ESDR0502BT1G has a total power dissipation rating of 150 mW at TA = 25°C. Its SC-75 package provides adequate thermal coupling to copper pours, and the device meets MSL 1 requirements-allowing unlimited floor life and direct placement into standard lead-free reflow profiles peaking at 260°C. No derating is needed below 70°C ambient, supporting reliable operation in enclosed industrial enclosures.

How does the capacitance of ESDR0502BT1G compare between unidirectional and bidirectional modes?

In unidirectional mode (e.g., pin1–pin3), ESDR0502BT1G measures 0.5 pF typical capacitance at 1 MHz and 0 V bias. When configured bidirectionally (pin1–pin2), the effective capacitance halves to 0.25 pF due to series connection of two identical diode junctions. This reduction is intrinsic to the device's dual-cathode architecture and is confirmed in the Electrical Characteristics table-making ESDR0502BT1G uniquely suited for differential high-speed links where sub-0.3 pF loading is critical.