Diodes Incorporated BZT52C36TQ-7-F

Overview

BZT52C36TQ-7-F from Diodes Incorporated is a surface-mount Zener diode with nominal zener voltage 36 V, ±5.6% tolerance (34.0–38.0 V), 2 mA test current, 90 Ω dynamic impedance at 1 kHz, and 300 mW power dissipation in SOD523 package. It provides precision voltage regulation and overvoltage protection in low-power analog and automotive signal conditioning circuits.

For engineers reviewing the BZT52C36TQ-7-F datasheet, BZT52C36TQ-7-F pinout, BZT52C36TQ-7-F application, or BZT52C36TQ-7-F equivalent, key selection criteria include zener voltage accuracy at 2 mA, thermal resistance (417 °C/W), cathode-band polarity marking, JEDEC-qualified reliability for automotive-grade use, and compatibility with FR-4 PCB layouts using 1.92 mm² copper pad area.

Technical Context

This Zener diode operates in reverse-biased breakdown mode to maintain stable reference voltage under varying load and temperature conditions. Its 36 V nominal zener voltage is specified at I_ZT = 2 mA, with maximum zener impedance of 90 Ω at 1 kHz and temperature coefficient of –3.5 to 0 mV/°C.

The device uses alloy-42 leadframe with matte tin annealed terminals, meets J-STD-020 moisture sensitivity Level 1, and is qualified to AEC-Q200 for passive components - enabling use in automotive infotainment power rails, sensor biasing, and ECU voltage monitoring where long-term stability and low-profile mounting are required.

Key Specifications

Pinout & Package

Package: SOD523 - ultra-compact surface-mount plastic package with cathode band marking on top surface; dimensions: D = 0.75–0.85 mm, E = 1.15–1.25 mm, He = 1.55–1.65 mm, weight ≈ 0.001 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5275B-7-F and BZX84-C36-7-F, BZT52C36TQ-7-F offers the smallest footprint (SOD523), lowest profile (0.6 mm), and tighter thermal resistance control for space-limited automotive modules - though with lower test current (2 mA) and marginally higher Z_ZT.

Availability

BZT52C36TQ-7-F is available at Aetrix Electronics and suitable for automotive sensor biasing, industrial analog signal clamping, and USB-C power delivery monitoring requiring stable component supply, AEC-Q200 compliance, and compact SOD523 packaging.

Supply support for BZT52C36TQ-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 precision voltage reference and overvoltage protection in harsh-environment applications including engine control, body electronics, and ADAS subsystems.

FAQ

What is the maximum reverse voltage before breakdown for BZT52C36TQ-7-F?

The nominal zener voltage is 36 V with a guaranteed range of 34.0 V to 38.0 V at I_ZT = 2 mA. Breakdown begins gradually above ~30 V, but full regulation occurs only within the specified V_Z window. The device is not rated for sustained operation above 38.0 V in reverse bias without exceeding power limits.

Is BZT52C36TQ-7-F suitable for automotive applications?

Yes - it is qualified to AEC-Q200 for passive components, manufactured in IATF 16949-certified facilities, and supports PPAP documentation. The "Q" suffix denotes automotive qualification, and its operating temperature range (–55°C to +150°C) meets under-hood requirements for engine control and chassis modules.

How does the SOD523 package affect thermal performance?

Mounted on FR-4 with 1.92 mm² copper pad, the SOD523 delivers R_θJA = 417 °C/W and R_θJC = 160 °C/W. This enables 300 mW dissipation at 25°C ambient, but derating is required above 25°C per Fig. 1 - e.g., only ~180 mW at 85°C ambient - due to the small thermal mass and limited copper interface area.

Can BZT52C36TQ-7-F replace older BZT52C36 variants in existing designs?

Yes - the "Q-7-F" suffix indicates tape-and-reel packaging with automotive qualification and green materials, but electrical specifications (V_Z, Z_ZT, I_R) match the base BZT52C36T. No layout or schematic changes are needed; only ensure the assembly process accommodates the SOD523 footprint and cathode-band orientation.