Diodes Incorporated BZT52C36-7-F

Overview

BZT52C36-7-F from Diodes Incorporated is a surface-mount 36 V Zener diode in SOD123 package, rated for 500 mW power dissipation at TL = +75°C and 370 mW at TA = +25°C, with 90 Ω maximum Zener impedance at 2 mA test current and ±5% voltage tolerance (34.0–38.0 V). It serves as a precision voltage reference or overvoltage clamp in low-power analog signal conditioning circuits.

For engineers reviewing the BZT52C36-7-F datasheet, BZT52C36-7-F pinout, BZT52C36-7-F application, or BZT52C36-7-F equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (RθJA = 338 °C/W), reverse leakage (<0.1 µA at 25.2 V), temperature coefficient (−2 mV/°C), and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under varying load and temperature conditions. Its planar die construction ensures consistent breakdown characteristics and low dynamic impedance (ZZK ≤ 350 Ω at IZK = 0.5 mA).

The device exhibits a negative temperature coefficient of −2 mV/°C, enabling predictable drift compensation in voltage-reference designs. With a cathode band polarity marking and matte tin-plated alloy 42 leadframe, it supports automated reflow assembly and complies with J-STD-020 Level 1 moisture sensitivity.

Key Specifications

Pinout & Package

Package: SOD123 - surface-mount plastic case (UL 94V-0), 0.010 g weight, cathode band marking, compatible with standard FR-4 PCB layouts using recommended 0.9 mm × 0.95 mm pads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5226BS-7-F and BZX84-C36, BZT52C36-7-F offers higher power capability (370 mW), AEC-Q101 qualification, and full RoHS/halogen-free compliance-making it the preferred choice for automotive and industrial applications demanding long-term reliability and regulatory alignment.

Availability

BZT52C36-7-F is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body electronics, consumer power adapters, and medical battery monitoring systems requiring stable component supply and long-lifecycle support.

Supply support for BZT52C36-7-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, headquartered in Plano, Texas, with design centers and manufacturing facilities across Asia and the Americas.

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

FAQ

What is the maximum reverse voltage (VR) this Zener diode can withstand before breakdown?

The BZT52C36-7-F has a nominal Zener voltage of 36 V with a guaranteed range of 34.0–38.0 V at 2 mA test current. Its reverse breakdown is specified at VR = 25.2 V for leakage testing, meaning it maintains <0.1 µA leakage below that voltage. Breakdown occurs predictably within the 34–38 V band under normal operating conditions.

Is this part suitable for use in automotive applications?

Yes - BZT52C36-7-F is explicitly qualified to AEC-Q101 standards for high-reliability automotive use. It undergoes stress testing for temperature cycling, humidity, mechanical shock, and ESD, and is manufactured with halogen- and antimony-free "Green" materials compliant with automotive supply chain requirements.

How does the SOD123 package affect thermal performance compared to SOT-23?

The SOD123 package has a higher junction-to-ambient thermal resistance (RθJA = 338 °C/W) than typical SOT-23 Zeners (~300 °C/W), due to smaller copper pad area and less thermal mass. To sustain 370 mW dissipation, it requires a minimum 1-inch² copper pour on FR-4 PCB per Diodes' layout guidelines.

Can this Zener diode be used in series or parallel configurations for higher voltage or current handling?

Series connection is viable for higher voltage references (e.g., two 36 V devices for ~72 V), but mismatched temperature coefficients cause drift imbalance. Parallel use is strongly discouraged - slight VZ differences cause current hogging and thermal runaway. For higher current, use a single higher-power Zener or active shunt regulator instead.