Alpha & Omega Semiconductor Inc. AOZ8S313UDS-05

Overview

AOZ8S313UDS-05 from Alpha & Omega Semiconductor is a 1-channel unidirectional ultra-low-capacitance TVS diode designed for ESD and surge protection of high-speed data lines including USB2.0. It delivers 0.6 pF typical junction capacitance, ±22 kV contact/±25 kV air IEC 61000-4-2 ESD immunity, and 5 V reverse working voltage, enabling robust signal integrity in mobile and notebook interfaces.

For engineers reviewing the AOZ8S313UDS-05 datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage at 1 A (±1.5 V), IEC 61000-4-5 surge rating (±6 A, 8/20 µs), junction temperature range (–40°C to +125°C), DFN1.0×0.6-2L package footprint, and RoHS/Halogen-Free compliance.

Technical Context

The AOZ8S313UDS-05 operates as a unidirectional transient voltage suppressor with anode-to-cathode polarity, clamping transients to ground or V_CC depending on polarity. Its low 0.6 pF capacitance minimizes signal distortion on 480 Mbps USB2.0 lines, while its 11–13 V breakdown voltage ensures reliable turn-on before system-level damage occurs.

It meets IEC 61000-4-2 (±22 kV contact), IEC 61000-4-5 (±6 A, 8/20 µs), and HBM (±8 kV) standards. The device uses silicon avalanche structure optimized for fast response (<1 ns) and low leakage (<50 nA at 5 V), supporting operation across –40°C to +125°C junction temperature.

Key Specifications

Pinout & Package

AOZ8S313UDS-05 is housed in a RoHS-compliant, halogen-free DFN1.0×0.6-2L package (1.0 mm × 0.6 mm × 0.5 mm), optimized for space-constrained mobile PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ5.0A and TPD2E001DRYR, the AOZ8S313UDS-05 uniquely balances sub-1 pF capacitance, ±22 kV contact ESD rating, and single-channel DFN1.0×0.6-2L packaging-making it optimal for discrete, high-fidelity USB2.0 line protection where layout area and signal fidelity are constrained.

Availability

AOZ8S313UDS-05 is available at Aetrix Electronics and suitable for USB2.0 interface protection, mobile phone front-end hardening, and notebook docking port surge mitigation requiring stable component supply and long-term lifecycle support.

Supply support for AOZ8S313UDS-05 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

Alpha & Omega Semiconductor (AOS) is a fabless power semiconductor company specializing in MOSFETs, TVS diodes, and power ICs for efficiency-critical applications.

The AOZ8S313UDS-05 belongs to AOS's ultra-low-capacitance TVS family, engineered specifically for ESD and surge protection of high-speed digital interfaces without compromising signal integrity.

FAQ

What is the maximum clamping voltage of the AOZ8S313UDS-05 under IEC 61000-4-5 surge conditions?

The AOZ8S313UDS-05 exhibits a clamping voltage of ±3 V at ±6 A (8/20 µs surge), as specified in its Electrical Characteristics table. This value ensures downstream USB transceivers remain within safe operating limits during lightning-induced transients. The clamping performance is validated per IEC 61000-4-5 test methodology and applies directly to the AOZ8S313UDS-05 under rated junction temperature conditions.

Is the AOZ8S313UDS-05 suitable for bidirectional signal lines like USB differential pairs?

Yes-the AOZ8S313UDS-05 is unidirectional but can protect bidirectional lines such as USB D+ and D– when used in pairs (one device per line), with cathodes tied to ground. Its 5 V VRWM and low 0.6 pF capacitance preserve signal symmetry and timing margins. The AOZ8S313UDS-05 does not conduct during normal 0–3.3 V signal swings, ensuring no interference with USB2.0 protocol operation.

Does the AOZ8S313UDS-05 meet automotive AEC-Q200 requirements?

No-the AOZ8S313UDS-05 is not AEC-Q200 qualified. It is rated for –40°C to +125°C junction temperature and RoHS/Halogen-Free compliance, but lacks the stress testing, failure analysis, and qualification documentation required for automotive-grade deployment. For AEC-Q200 applications, consult AOS's automotive-qualified TVS portfolio; the AOZ8S313UDS-05 remains intended for industrial and consumer mobile platforms.

What is the leakage current specification for the AOZ8S313UDS-05 at its rated reverse working voltage?

At VRWM = 5 V and TA = 25°C, the AOZ8S313UDS-05 specifies a maximum reverse leakage current (IR) of 50 nA. This ultra-low leakage ensures negligible standby power draw and avoids false triggering in always-on USB detection circuits. The value is measured per standard test conditions and applies to every unit of AOZ8S313UDS-05 shipped.

Can the AOZ8S313UDS-05 be used to protect HDMI or PCIe lines?

No-the AOZ8S313UDS-05 is optimized for USB2.0 (480 Mbps) with 0.6 pF capacitance, but HDMI 1.4 (1.65 Gbps) and PCIe Gen2 (5 Gbps) require sub-0.3 pF devices to maintain signal integrity. While the AOZ8S313UDS-05 may function electrically, its capacitance exceeds recommended limits for those interfaces. For HDMI or PCIe, AOS offers lower-capacitance variants; the AOZ8S313UDS-05 should be reserved for USB2.0 and similarly bandwidth-limited applications.