Diodes Incorporated ZC2811ETA

Overview

ZC2811ETA from Zetex Semiconductors (now Diodes Incorporated) is a Schottky barrier diode in SOT23 package, rated for 15 V reverse voltage, 20 mA forward current, and 410 mV forward voltage at 1 mA - optimized for low-loss signal clamping and high-frequency detector applications in portable RF front-ends.

For engineers reviewing the ZC2811ETA datasheet, ZC2811ETA pinout, ZC2811ETA application, or ZC2811ETA equivalent, key selection criteria include its 1.2 pF junction capacitance at 0 V, 100 ps minority carrier lifetime, 100 nA reverse leakage at 10 V, SOT23-3 terminal configuration, and thermal stability across –55°C to +150°C operating range.

Technical Context

This device employs a planar-doped, epitaxial silicon Schottky structure enabling fast switching with minimal stored charge. Its 100 ps effective minority lifetime and low 1.2 pF capacitance support operation up to 54 MHz under pulsed conditions.

The diode exhibits stable reverse leakage (≤100 nA at VR = 10 V) and forward conduction (VF = 410 mV @ IF = 1 mA) across ambient temperatures from –55°C to +150°C, making it suitable for thermally constrained RF detector and clamp circuits.

Key Specifications

Pinout & Package

SOT23-3 plastic surface-mount package with gull-wing leads; standard pin 1–2–3 layout aligned to JEDEC TO-236AB outline.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Schottky diode applications.

Compared with BAT54C and NSR0230HT1G, ZC2811ETA uniquely balances sub-1.5 pF capacitance, 100 ps switching, and SOT23 manufacturability - making it optimal for production RF detector designs requiring repeatable 54 MHz performance and thermal robustness.

Availability

ZC2811ETA is available at Aetrix Electronics and suitable for RF detector modules, ESD-protected antenna interfaces, and low-power sensor signal chains requiring stable component supply and long-term obsolescence management.

Supply support for ZC2811ETA 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

Zetex Semiconductors, acquired by Diodes Incorporated in 2008, specialized in high-performance discrete semiconductors for RF, analog, and power management applications.

ZC2811ETA belongs to Zetex's legacy SOT23 Schottky diode family, engineered specifically for high-frequency detection and low-voltage clamping in portable communications equipment.

FAQ

What is the cathode marking convention for ZC2811ETA?

The cathode is located at pin 2, identified by a molded cathode band adjacent to pin 1 on the top surface of the SOT23 package. Pin 1 is marked with a dot or notch; pin 3 is internally unconnected and must remain floating in circuit layout.

Does ZC2811ETA support reflow soldering per J-STD-020?

Yes - ZC2811ETA is qualified for lead-free reflow per J-STD-020, with peak temperature tolerance up to 260°C for 30 seconds. Its SOT23 package meets moisture sensitivity level MSL-1, eliminating bake requirements prior to assembly.

Can ZC2811ETA replace ZC2800E in existing designs?

No - ZC2800E has 70 V V_BR and 200 nA I_R @ 50 V, while ZC2811E is rated for only 15 V V_BR and 100 nA I_R @ 10 V. Substitution requires verification of reverse voltage stress and leakage impact on detector offset.

Is pin 3 truly unused, or does it serve a thermal function?

Pin 3 is electrically isolated and unconnected internally - it serves no electrical or thermal function. Thermal dissipation occurs solely through pins 1 and 2; PCB copper pour under the package body provides additional heatsinking, but pin 3 must not be soldered or tied to any net.