Diodes Incorporated BZT52C36S-7-F

Overview

BZT52C36S-7-F from Diodes Incorporated is a surface-mount Zener diode with a nominal zener voltage of 36 V, ±5.6% tolerance (34.0–38.0 V), 2 mA test current, 90 Ω maximum zener impedance at 2 mA, and 200 mW power dissipation in SOD323 package. It provides precise voltage regulation in low-power supply rails and overvoltage protection circuits.

For engineers reviewing the BZT52C36S-7-F datasheet, BZT52C36S-7-F pinout, BZT52C36S-7-F application, or BZT52C36S-7-F equivalent, key selection criteria include zener voltage accuracy, thermal resistance (625 °C/W), reverse leakage (<0.1 µA at 30.4 V), temperature coefficient (+25.2 mV/°C), and AEC-Q101 qualification for automotive use.

Technical Context

This Zener diode operates in reverse breakdown mode to maintain stable reference voltage under varying load and temperature conditions. Its planar die construction ensures consistent breakdown characteristics, while the SOD323 package enables high-density PCB layouts and compatibility with automated reflow assembly.

The device exhibits a positive temperature coefficient of +25.2 mV/°C above 5 V, enabling predictable drift compensation in voltage-reference designs. With 0.1 µA maximum reverse current at VR = 30.4 V and 90 Ω dynamic impedance at IZT = 2 mA, it supports precision clamping in signal conditioning and power-supply feedback paths.

Key Specifications

Pinout & Package

SOD323 package: 2-terminal surface-mount device with cathode band marking; terminals are anode and cathode, mounted on FR-4 PCB using standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMSZ5245B-7-F and BZX84-C36, BZT52C36S-7-F offers tighter integration into space-constrained automotive PCBs via its 1.3 mm × 1.7 mm SOD323 footprint, full AEC-Q101 validation, and halogen-free "Green" construction-making it optimal for safety-critical, high-reliability embedded systems.

Availability

BZT52C36S-7-F is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor signal conditioning, and consumer power adapter feedback requiring stable component supply across production lifecycles.

Supply support for BZT52C36S-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, manufacturing, and sales operations across Asia, Europe, and North America.

The BZT52C series belongs to Diodes' automotive-qualified Zener diode product line, engineered specifically for voltage regulation and transient suppression in harsh-environment electronic control units and sensor interfaces.

FAQ

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

The BZT52C36S-7-F has a nominal zener voltage of 36 V with a guaranteed breakdown range of 34.0 V to 38.0 V at 2 mA test current. It is not rated for continuous operation above 38.0 V in reverse bias; exceeding this risks irreversible avalanche degradation or thermal runaway if power dissipation exceeds 200 mW.

Is this part suitable for use in automotive applications?

Yes - BZT52C36S-7-F is explicitly qualified to AEC-Q101 standards, including stress tests for temperature cycling, humidity, mechanical shock, and ESD. Its SOD323 package, matte tin plating, and halogen-free molding compound meet automotive Tier-1 supplier requirements for under-hood and body-control module deployments.

How does the temperature coefficient affect regulation accuracy over temperature?

With a +25.2 mV/°C temperature coefficient, the zener voltage increases linearly with junction temperature. At 100 °C ambient (assuming ~50 °C junction rise), voltage rises by ~1.26 V above 25 °C value - resulting in ~37.26 V regulation. This must be factored into reference stability budgets for precision analog circuits.

Can this Zener diode replace a 33 V or 39 V variant in the same circuit?

No - direct substitution is not recommended. The BZT52C36S-7-F has distinct electrical boundaries: 34.0–38.0 V breakdown range, 2 mA test current, and +25.2 mV/°C TC differ from BZT52C33S (31.0–35.0 V, +23.1 mV/°C) and BZT52C39S (37.0–41.0 V, +27.3 mV/°C). Mismatched voltage or TC may cause regulation failure or thermal instability.