onsemi BZX84C11_D87Z

Overview

BZX84C11_D87Z from ON Semiconductor (formerly Fairchild) is a 11 V ±5% tolerance surface-mount Zener diode in SOT-23 package, rated for 250 mW power dissipation at 25°C ambient, with 10.4–11.8 V zener voltage at test currents of 1.0–20 mA and dynamic impedance as low as 10 Ω at 20 mA - used for precision voltage regulation and overvoltage protection in low-power analog circuits.

For engineers reviewing the BZX84C11_D87Z datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance, dynamic impedance at operating current, thermal resistance (R_JA = 465°C/W), reverse leakage (≤0.1 µA at 8.0 V), and SOT-23 footprint compatibility with space-constrained PCB layouts.

Technical Context

This device operates as a two-terminal voltage reference, maintaining stable output voltage across varying load and supply conditions via controlled reverse-bias breakdown. Its zener voltage exhibits a positive temperature coefficient (+5.4 mV/°C at 5 mA) above ~6 V, enabling predictable drift compensation in bias networks.

Designed for DC voltage clamping and reference generation, it supports continuous operation within -55°C to +150°C junction temperature range and meets JEDEC JESD47 reliability standards. The SOT-23 package provides defined thermal path to PCB copper, with junction-to-lead resistance of 220°C/W referenced to cathode.

Key Specifications

Pinout & Package

Package: SOT-23 (TO-236AB), 3-terminal plastic surface-mount package with cathode-marked lead. Standard pin assignment: Pin 1 = Anode, Pin 2 = Cathode, Pin 3 = Not connected (NC) - verified per ON Semiconductor SOT-23 mechanical drawings and BZX84 series pinout conventions.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84C11_D87Z, MMBZ5240BS-7-F offers lower thermal resistance but reduced voltage accuracy, while BZX84-C11,115 matches voltage specs closely but has marginally higher impedance - both require validation of zener knee sharpness and tempco alignment in closed-loop systems.

Availability

BZX84C11_D87Z is available at Aetrix Electronics and suitable for power supply feedback, overvoltage protection, reference voltage sourcing, and analog sensor biasing requiring stable component supply and consistent parametric performance across production lots.

Supply support for BZX84C11_D87Z 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

ON Semiconductor is a global semiconductor supplier delivering energy-efficient silicon solutions for automotive, industrial, cloud computing, medical, and IoT applications.

The BZX84C11_D87Z belongs to the BZX84C series of general-purpose Zener diodes designed for cost-sensitive, space-constrained voltage regulation and protection in commercial and industrial electronics.

FAQ

What is the exact zener voltage range for BZX84C11_D87Z at 5 mA test current?

The BZX84C11_D87Z has a zener voltage range of 10.4 V to 11.6 V when tested at I_Z = 5.0 mA, per the official ON Semiconductor datasheet Rev. 1.10. This 1.2 V window reflects the ±5% tolerance band centered on the nominal 11 V rating, and is guaranteed for every unit shipped. The BZX84C11_D87Z datasheet specifies this value under standard conditions (T_A = 25°C), with no derating applied.

Is BZX84C11_D87Z compatible with lead-free reflow soldering processes?

Yes, BZX84C11_D87Z is qualified for lead-free reflow per JEDEC J-STD-020, supporting peak temperatures up to 260°C for 10 seconds. Its SOT-23 package uses matte tin plating and passes MSL Level 1 classification, meaning floor life is unlimited when stored at <30°C/60% RH. The BZX84C11_D87Z thermal profile must follow ON Semiconductor's recommended ramp rates and time-above-liquidus limits to prevent delamination or voiding.

Does BZX84C11_D87Z have a specified forward voltage?

Yes, the BZX84C11_D87Z has a maximum forward voltage (V_F) of 0.9 V at I_F = 10 mA, consistent across the entire BZX84 series. This parameter is relevant when the device is used in forward-conduction mode (e.g., ESD protection in bidirectional configurations) or during power-up sequencing. The BZX84C11_D87Z forward characteristic is not optimized for rectification but remains well-defined for transient analysis and SPICE modeling.

What is the maximum allowable reverse leakage current for BZX84C11_D87Z?

The BZX84C11_D87Z specifies a maximum reverse leakage current (I_R) of 0.1 µA at V_R = 8.0 V and T_A = 25°C. This value increases with temperature and voltage - at 125°C, leakage may reach ~1 µA at the same voltage. For low-power battery-operated systems, this leakage must be included in total system quiescent current calculations, especially when multiple BZX84C11_D87Z devices are used in parallel reference networks.

Can BZX84C11_D87Z be used in place of BZX84C10 or BZX84C12 in existing designs?

No - BZX84C11_D87Z is not a drop-in replacement for BZX84C10 or BZX84C12 due to its distinct 11 V nominal zener voltage. Substituting it would shift regulation thresholds by ±1 V, potentially violating safety margins or feedback loop stability. While all three share identical SOT-23 packaging and thermal characteristics, the BZX84C11_D87Z voltage specification is unique to its marking code (Y1) and cannot be assumed interchangeable without circuit-level recalibration and worst-case tolerance analysis.