Diodes Incorporated BZT52C27-13

Overview

BZT52C27-13 from Diodes Incorporated is a surface-mount 27 V Zener diode in SOD123 package, rated for 500 mW power dissipation at TL = +75°C and 370 mW at TA = +25°C, with ±5% zener voltage tolerance (25.1–28.9 V), 80 Ω maximum zener impedance at 2 mA test current, and 0.1 µA maximum reverse leakage at 21.4 V. It serves as a precision voltage reference or overvoltage clamp in low-power analog and power-supply feedback circuits.

For engineers reviewing the BZT52C27-13 datasheet, BZT52C27-13 pinout, BZT52C27-13 application, or BZT52C27-13 equivalent, key selection criteria include zener voltage accuracy, thermal resistance (RθJA = 338 °C/W), SOD123 footprint compatibility, AEC-Q101 qualification status, and low-leakage performance under reverse bias.

Technical Context

This Zener diode operates in reverse breakdown mode to maintain stable voltage regulation across varying load currents. Its planar die construction ensures consistent breakdown characteristics and long-term stability under thermal cycling.

The device exhibits a positive temperature coefficient of +18.9 mV/°C near its nominal 27 V rating, enabling predictable drift compensation in temperature-sensitive references. It is optimized for automated SMT assembly with matte tin-plated alloy 42 leads and meets J-STD-020 Level 1 moisture sensitivity.

Key Specifications

Pinout & Package

Package: SOD123 - molded plastic case, 0.010 g weight, UL 94V-0 flammability rating, cathode indicated by band marking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5256BS-7-F and BZX84-C27, BZT52C27-13 offers superior thermal performance (R_θJA = 338 °C/W vs. 390/400 °C/W), AEC-Q101 qualification, and higher 370 mW ambient-rated power-making it optimal for automotive and industrial designs requiring robustness and stable regulation under thermal stress.

Availability

BZT52C27-13 is available at Aetrix Electronics and suitable for automotive lighting control, industrial sensor reference circuits, USB power rail clamping, and low-power SMPS feedback networks requiring stable component supply with full traceability and lifecycle management.

Supply support for BZT52C27-13 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, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.

The BZT52 series belongs to Diodes' general-purpose Zener diode product line, engineered for medium-current voltage regulation and overvoltage protection in cost-sensitive, high-volume applications including automotive, industrial, and consumer electronics.

FAQ

What is the maximum steady-state power dissipation for BZT52C27-13 at room temperature?

The BZT52C27-13 is rated for 370 mW power dissipation at ambient temperature (T_A) of +25°C when mounted on an FR-4 PCB with a 1-inch copper pad. This value drops linearly with rising ambient temperature per the derating curve in Figure 1, reaching 0 W at approximately +150°C.

Is BZT52C27-13 suitable for automotive applications?

Yes-BZT52C27-13 is qualified to AEC-Q101 standards, confirming its reliability for automotive use in non-safety-critical systems such as body electronics, infotainment power supplies, and lighting control modules. It is not authorized for life-support or safety-critical functions without explicit Diodes Incorporated approval.

How does the temperature coefficient affect regulation accuracy over temperature?

With a specified temperature coefficient of +18.9 mV/°C, the BZT52C27-13's zener voltage increases predictably with junction temperature. Over a -40°C to +125°C range, this yields ~3.1 V total drift-designers must account for this in precision references, though it remains stable enough for most clamping and coarse regulation uses.

What is the reverse leakage current at 80% of nominal zener voltage?

At V_R = 21.4 V (80% of 27 V), the maximum reverse leakage current is 0.1 µA per the Electrical Characteristics table. This ultra-low leakage supports energy-efficient operation in battery-backed or always-on monitoring circuits where standby current must be minimized.