Diodes Incorporated BZT52C11-13-F

Overview

BZT52C11-13-F from Diodes Incorporated is a surface-mount Zener diode with nominal 11 V zener voltage (10.4–11.6 V range), 5 mA test current, 20 Ω maximum zener impedance at I_ZT, and 0.1 µA maximum reverse leakage at 8.0 V. It delivers precise voltage regulation in low-power biasing and reference circuits, commonly used in power supply feedback loops and overvoltage protection for microcontroller I/O rails.

For engineers reviewing the BZT52C11-13-F datasheet, BZT52C11-13-F pinout, BZT52C11-13-F application, or BZT52C11-13-F equivalent, key selection criteria include zener voltage tolerance, dynamic impedance at operating current, thermal derating behavior, and SOD123 package compatibility with automated PCB assembly.

Technical Context

This device operates as a two-terminal voltage reference using avalanche breakdown in silicon planar junction construction. It maintains stable regulation across ambient temperatures from –65 °C to +150 °C, with a temperature coefficient of +5.4 mV/°C - indicating positive drift above 6 V, enabling predictable compensation in temperature-sensitive references.

The 500 mW maximum power dissipation at T_L = +75 °C and 370 mW at T_A = +25 °C reflects its thermal design for FR-4 PCB mounting with 1-inch copper pad. Its 338 °C/W junction-to-ambient thermal resistance necessitates careful layout for sustained 5 mA operation under elevated ambient conditions.

Key Specifications

Pinout & Package

Two-terminal device in SOD123 plastic package with cathode band marking. No internal pin numbering; anode and cathode are defined by physical orientation and polarity marking on top surface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5240B-7-F and BZX84-C11, BZT52C11-13-F offers superior zener impedance (20 Ω vs. 100 Ω/25 Ω) and tighter voltage tolerance (±5.5% vs. ±5% for BZX84-C11, ±10% for MMBZ5240B), making it optimal for precision feedback and low-leakage biasing where SOD123 footprint is acceptable.

Availability

BZT52C11-13-F is available at Aetrix Electronics and suitable for power supply feedback, microcontroller I/O protection, voltage reference for ADC, and overvoltage detection requiring stable component supply across automotive, industrial control, and consumer electronics programs.

Supply support for BZT52C11-13-F 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability components for automotive, industrial, and computing markets.

The BZT52 series belongs to Diodes' general-purpose Zener diode product line, engineered for cost-effective, high-volume voltage regulation and protection in space-constrained surface-mount designs.

FAQ

What is the maximum continuous reverse current this Zener can handle at 11 V?

The BZT52C11-13-F is not rated for continuous reverse current at its nominal zener voltage. At 11 V, it operates in breakdown and draws current determined by external series resistance. Its absolute maximum power dissipation is 370 mW at 25 °C ambient, limiting continuous current to ≤33.6 mA (370 mW ÷ 11 V) with adequate PCB thermal relief.

Does this part have a specified capacitance value for high-frequency decoupling use?

No, the datasheet does not specify junction capacitance for BZT52C11-13-F. While Figure 5 shows typical C_T ≈ 35 pF for 11 V devices at 1 MHz and 1 V reverse bias, this value is not guaranteed or characterized for design-critical RF filtering - it should not be relied upon for signal integrity or EMI suppression roles.

Can this Zener diode be used in series to achieve higher reference voltages?

Yes, multiple BZT52C11-13-F units may be stacked in series to generate higher reference voltages (e.g., two in series yield ~22 V). However, mismatched zener voltages and temperature coefficients will cause unequal voltage division and reduced overall stability - precision references require matched monolithic solutions instead.

Is the SOD123 package compatible with standard reflow soldering profiles for lead-free assembly?

Yes, the SOD123 package uses matte tin plating qualified to MIL-STD-202 Method 208 and supports Pb-free reflow profiles. Its moisture sensitivity level is J-STD-020 Level 1, meaning it can be stored indefinitely at ≤30 °C/60% RH without baking prior to assembly.