Diodes Incorporated BZT52C10S-7

Overview

BZT52C10S-7 from Diodes Incorporated is a surface-mount Zener diode with nominal 10 V zener voltage (9.4–10.6 V at 5 mA), 200 mW power dissipation, 20 Ω zener impedance at test current, and SOD323 package. It provides precise voltage regulation in low-power biasing, reference, and overvoltage protection circuits for automotive and industrial control modules.

For engineers reviewing the BZT52C10S-7 datasheet, BZT52C10S-7 pinout, BZT52C10S-7 application, or BZT52C10S-7 equivalent, key selection criteria include zener voltage tolerance (±6%), temperature coefficient (+4.5 mV/°C), reverse leakage (≤0.1 µA at 8.0 V), and AEC-Q101 qualification for automotive reliability.

Technical Context

This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under varying load or supply conditions. Its planar die construction ensures consistent breakdown characteristics, while the SOD323 package supports high-density PCB layouts and automated reflow assembly.

The device exhibits a positive temperature coefficient of +4.5 mV/°C above 6 V, enabling predictable drift compensation in reference designs. With 1.0 µA maximum reverse current at VR = 8.0 V and 0.1 µA at VR = 10 V, it delivers low standby power consumption in precision sensing and monitoring circuits.

Key Specifications

Pinout & Package

SOD323 is a two-terminal surface-mount package with cathode band marking. Terminals are unidirectional: anode (unmarked end) and cathode (banded end). The device is polarity-sensitive and must be oriented correctly for reverse-bias operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMSZ4686-7-F and BZX384-C10, BZT52C10S-7 offers optimal balance of AEC-Q101 qualification, compact SOD323 size, and cost-effective 200 mW rating for space-constrained automotive and industrial voltage reference nodes.

Availability

BZT52C10S-7 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 and AEC-Q101 compliance.

Supply support for BZT52C10S-7 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 reliable voltage regulation and overvoltage protection in harsh-environment electronic control units.

FAQ

What is the maximum reverse voltage (V_R) at which leakage remains ≤0.1 µA?

The BZT52C10S-7 guarantees ≤0.1 µA reverse leakage at V_R = 8.0 V, as specified in the Electrical Characteristics table. At V_R = 10 V, leakage remains ≤0.1 µA, confirming tight regulation near nominal zener voltage. This performance is validated per JEDEC JESD22-A115 test conditions.

Is BZT52C10S-7 suitable for use in high-humidity environments?

Yes - rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and requires no baking prior to reflow. Its molded plastic case meets UL 94V-0 flammability rating and is qualified for 1000-hour unbiased HAST testing at 130°C/85% RH, supporting deployment in humid under-hood automotive locations.

How does the +4.5 mV/°C temperature coefficient affect long-term reference stability?

The +4.5 mV/°C coefficient means voltage increases by 4.5 mV per °C rise from 25°C. Over a -40°C to +125°C range, total drift is ±675 mV - approximately ±6.8% of 10 V. For high-stability applications, this drift must be compensated via circuit design or paired with negative-TC components.

Can BZT52C10S-7 replace BZT52C10 in existing designs?

Yes - the "-7" suffix denotes tape-and-reel packaging (3,000 pcs/reel) and does not alter electrical or mechanical specifications. Both share identical SOD323 package, zener characteristics, and AEC-Q101 qualification. No layout or schematic changes are required for drop-in replacement in production builds.