onsemi SESD5481MUT5G

Overview

ESD5481MUT5G from onsemi is a bidirectional ESD protection diode in X3DFN2 package (0.60 mm × 0.30 mm, 0.3 mm height), designed for I/O line protection in portable electronics. It delivers 5.0 V stand-off voltage, 15 pF junction capacitance, <1 ns response time, and clamps to ≤23 V at ±16 A TLP, meeting IEC61000-4-2 Level 4 (±20 kV contact/air) and IEC61000-4-4 Level 4.

For engineers reviewing the ESD5481MUT5G datasheet, pinout, applications, or equivalent options, key selection criteria include low-capacitance signal integrity preservation, sub-1 ns transient response for high-speed interfaces, verified IEC61000-4-2/4-4 compliance, and ultra-compact footprint for space-constrained USB, HDMI, and audio port designs.

Technical Context

The ESD5481MUT5G is a silicon-based, bidirectional TVS diode with symmetrical clamping behavior across both polarities. Its dynamic resistance is 0.49 Ω (Pin1→Pin2) and 0.28 Ω (Pin2→Pin1), enabling low-voltage overshoot during fast transients. The device operates without bias and requires no external circuitry.

It is characterized using Transmission Line Pulse (TLP) testing per ANSI/ESD STM5.5.1 (Z₀ = 50 Ω, tₚ = 100 ns, tᵣ = 4 ns), with clamping validated at ±16 A (IEC61000-4-2 Level 2 equivalent). Junction capacitance of 12–15 pF at 0 V / 1 MHz ensures minimal signal distortion on high-speed lines up to ~1 GHz.

Key Specifications

Pinout & Package

ESD5481MUT5G uses the X3DFN2 package (Case 152AF), measuring 0.62 mm × 0.32 mm × 0.24 mm with 0.35 mm pitch. It is a 2-terminal, surface-mount, bidirectional device with no polarity marking-Pin 1 and Pin 2 are functionally identical and interchangeable.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPD2E001DRYR and ESD7L5.0DT5G, the ESD5481MUT5G offers optimal balance of ultra-small size (0.62 × 0.32 mm), bidirectional symmetry, and 15 pF capacitance-making it uniquely suited for miniaturized high-speed interfaces where layout area and signal fidelity are simultaneously constrained.

Availability

ESD5481MUT5G is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI port ESD suppression, and smartphone audio jack protection requiring stable component supply and consistent RoHS-compliant sourcing.

Supply support for ESD5481MUT5G 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 delivering energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, medical, and IoT applications.

The ESD5481MUT5G belongs to onsemi's Micro-Packaged Diodes for ESD Protection product line, engineered specifically for board-level I/O protection in space-constrained portable electronics where low capacitance and certified IEC61000-4-2/4-4 performance are mandatory.

FAQ

What is the maximum working voltage supported by ESD5481MUT5G?

The ESD5481MUT5G has a specified reverse working voltage (VRWM) of 5.0 V, meaning it remains non-conductive under steady-state DC or AC signals up to this level. This makes it compatible with 3.3 V and 5 V logic systems, including USB 2.0, HDMI, and analog audio interfaces. Exceeding 5.0 V may cause leakage or premature conduction, compromising signal integrity or protection function.

Does ESD5481MUT5G require a ground connection to operate?

Yes, ESD5481MUT5G requires a low-impedance path to ground (or reference plane) via Pin 2 to shunt ESD current away from protected circuitry. In its standard configuration, Pin 1 connects to the I/O line and Pin 2 connects to ground. Without this return path, the device cannot clamp transients effectively, leaving downstream components vulnerable to overvoltage damage during ESD events.

Can ESD5481MUT5G be used on high-speed differential pairs like USB or HDMI?

Yes, ESD5481MUT5G is explicitly designed for high-speed differential interfaces. Its 12–15 pF junction capacitance, bidirectional symmetry, and <1 ns response time preserve signal integrity on USB 2.0 (480 Mbps) and HDMI TMDS channels. Application Note AND8308/D confirms its suitability for such placements, and layout guidelines recommend placing it within 3 mm of the connector with short, direct ground traces to minimize inductance.

What is the thermal resistance and power dissipation capability of ESD5481MUT5G?

ESD5481MUT5G has a junction-to-ambient thermal resistance (R_JA) of 400 °C/W on FR-5 board and a total power dissipation rating of 300 mW at TA = 25 °C. These values reflect its micro-package limitations-intended for transient, not continuous, power handling. During an ESD pulse, energy is dissipated in nanoseconds; sustained power above 300 mW would exceed thermal limits and risk permanent damage to the ESD5481MUT5G.

Is ESD5481MUT5G compliant with automotive AEC-Q200 standards?

No, ESD5481MUT5G is not AEC-Q200 qualified. It is rated for industrial and consumer applications with a junction temperature range of −55 °C to +150 °C and MSL 1 reflow compatibility, but it lacks the extended temperature cycling, vibration, and qualification testing required for automotive-grade components. For AEC-Q200-compliant alternatives, consult onsemi's Automotive ESD portfolio, such as the ESD5481QUT5G variant.