Diodes Incorporated BZT52C10-7

Overview

BZT52C10-7 from Diodes Incorporated is a surface-mount 10 V Zener diode in SOD123 package, rated for 500 mW power dissipation at TL = +75°C and 370 mW at TA = +25°C, with ±6% zener voltage tolerance (9.4–10.6 V @ 5 mA), 20 Ω typical zener impedance at test current, and 0.2 µA maximum reverse leakage at 8.0 V. It serves as a precision voltage reference or overvoltage clamp in low-power analog signal conditioning circuits.

For engineers reviewing the BZT52C10-7 datasheet, BZT52C10-7 pinout, BZT52C10-7 application, or BZT52C10-7 equivalent, key selection criteria include its 10 V nominal breakdown voltage, SOD123 footprint compatibility, AEC-Q101 qualification for automotive use, thermal resistance (RθJA = 338 °C/W), and low-temperature coefficient (±0.45 mV/°C) - all critical for stable biasing in sensor interfaces and power supply monitoring.

Technical Context

This Zener diode operates in reverse-biased breakdown mode to maintain a stable reference voltage across its terminals under controlled current conditions. Its planar die construction ensures consistent breakdown characteristics and low leakage, while the SOD123 package enables high-density PCB layouts and compatibility with automated reflow assembly.

The device exhibits a nominal temperature coefficient of +0.45 mV/°C near 10 V, indicating slight positive drift with temperature - a key factor when used in temperature-sensitive references. Its 20 Ω dynamic impedance at 5 mA supports stable regulation under moderate load variations, and its 0.2 µA IR at VR = 8.0 V confirms tight leakage control for low-power standby circuits.

Key Specifications

Pinout & Package

Package: SOD123 - surface-mount plastic case with cathode band marking; dimensions: 2.65 mm × 1.55 mm × 1.05 mm (L × W × H); weight ≈ 0.010 g; RoHS-compliant matte tin finish on Alloy 42 leadframe.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5240B-7-F and BZX84-C10-7, BZT52C10-7 offers superior power handling (370 mW), lower thermal resistance (338 °C/W), and identical zener impedance - making it optimal for space-constrained, thermally demanding applications like automotive BCMs and industrial sensors.

Availability

BZT52C10-7 is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, automotive body control module power monitoring, and low-power IoT node voltage reference requiring stable component supply and long-term lifecycle support.

Supply support for BZT52C10-7 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, specializing in high-reliability components for automotive, industrial, and consumer markets.

The BZT52 series belongs to Diodes' general-purpose Zener diode product line, designed specifically for cost-effective, space-efficient voltage regulation and protection in high-volume surface-mount applications.

FAQ

What is the maximum continuous reverse current the BZT52C10-7 can handle without degradation?

The device is rated for 5 mA test current (IZT), and its absolute maximum DC reverse current is limited by power dissipation: at TA = +25°C, 370 mW / 10 V = 37 mA theoretical limit, but derating per Fig. 1 reduces usable current to ~25 mA at +75°C ambient. Sustained operation above 20 mA requires thermal pad design to avoid junction overheating.

Is the BZT52C10-7 suitable for use in automotive infotainment systems?

Yes - it is AEC-Q101 qualified and rated for −65°C to +150°C operating temperature. Its 0.2 µA reverse leakage at 8.0 V and stable 10 V breakdown make it appropriate for voltage supervision in display backlight drivers and USB-C power negotiation circuits, provided current-limiting resistors are sized per ISO 16750-2 load-dump immunity requirements.

How does the SOD123 package affect solder joint reliability compared to SOT-23?

The SOD123's shorter leads and symmetric two-terminal geometry reduce mechanical stress during thermal cycling, improving solder joint integrity in high-vibration environments. Its lower profile (1.05 mm height vs. SOT-23's ~1.3 mm) also minimizes board flex-induced cracking risk - validated in Diodes' AEC-Q200 vibration testing reports.

Can the BZT52C10-7 replace a 1N4740A in an existing through-hole design?

No - the 1N4740A is a 10 V, 1 W through-hole Zener in DO-41 package, while BZT52C10-7 is a 370 mW surface-mount device in SOD123. Direct replacement requires PCB redesign, current-limiting resistor recalculation (due to lower PD), and thermal validation. For drop-in upgrades, consider the surface-mount BZX84-C10-7 instead.