Diodes Incorporated BZT52C3V0-13

Overview

BZT52C3V0-13 from Diodes Incorporated is a surface-mount 3.0 V Zener diode in SOD123 package, rated for 500 mW power dissipation at TL = +75°C and 370 mW at TA = +25°C, with nominal Zener voltage tolerance of ±3.3% (2.8–3.2 V @ 5 mA), low dynamic impedance (95 Ω @ 5 mA), and reverse leakage ≤10 µA @ VR = 1.0 V. It serves as a precision voltage reference or overvoltage clamp in low-power analog sensing and power rail regulation circuits.

For engineers reviewing the BZT52C3V0-13 datasheet, BZT52C3V0-13 pinout, BZT52C3V0-13 application, or BZT52C3V0-13 equivalent, key selection criteria include its 3.0 V nominal Zener voltage, 95 Ω Zener impedance at 5 mA, -3.5 mV/°C temperature coefficient, SOD123 footprint compatibility, 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 or supply conditions. Its planar die construction ensures consistent breakdown characteristics and low leakage, while the SOD123 package enables high-density PCB layout and compatibility with automated reflow assembly.

The device exhibits a negative temperature coefficient of -3.5 mV/°C, meaning its Zener voltage decreases linearly with rising junction temperature. At 5 mA test current, it delivers tight voltage regulation (2.8–3.2 V) with minimal dynamic impedance (95 Ω), supporting accurate reference generation in battery-powered and industrial sensor interfaces.

Key Specifications

Pinout & Package

Package: SOD123 - molded plastic case, UL 94V-0 rated, 0.010 g weight, matte tin-plated alloy 42 leadframe, cathode band marking on top surface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5223BS-7-F and BZX84-C3V0, BZT52C3V0-13 offers superior thermal robustness (370 mW vs. 300–350 mW), AEC-Q101 validation, and identical Zener impedance at 5 mA-making it optimal for automotive and industrial applications demanding long-term reliability under thermal stress.

Availability

BZT52C3V0-13 is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, automotive cabin control modules, and USB-C power negotiation interfaces requiring stable component supply, RoHS/Green compliance, and AEC-Q101 traceability.

Supply support for BZT52C3V0-13 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 across Asia and manufacturing facilities in China, Taiwan, and the U.S.

The BZT52C series belongs to Diodes' general-purpose Zener diode product line, engineered for medium-current voltage regulation and clamping in cost-sensitive, high-volume applications such as power supplies, interface protection, and reference circuits.

FAQ

What is the maximum reverse voltage (VR) at which BZT52C3V0-13 guarantees IR ≤10 µA?

The datasheet specifies that reverse leakage current (IR) is ≤10 µA at VR = 1.0 V. This condition is measured at TA = +25°C using short-duration pulse testing to avoid self-heating effects. At VR = 2.0 V, IR remains ≤10 µA, confirming strong blocking behavior well below the Zener knee.

Can BZT52C3V0-13 be used in place of a 3.3 V Zener diode for 3.3 V rail monitoring?

No-it is not recommended. With a nominal Zener voltage of 3.0 V (2.8–3.2 V range), it clamps below the 3.3 V rail's nominal level and may falsely trigger during normal operation. For 3.3 V rail supervision, BZT52C3V3 (3.3 V nominal, 3.1–3.5 V range) is the correct variant in this series.

Does BZT52C3V0-13 require a series current-limiting resistor in all applications?

Yes-except in transient clamping where peak current is inherently limited by source impedance. For steady-state regulation, a series resistor must limit current to keep power dissipation within 370 mW at +25°C ambient. Example: With 5 V supply and 3.0 V Zener, minimum R = (5 − 3.0) V / 120 mA = 16.7 Ω to stay within 370 mW.

Is the SOD123 package of BZT52C3V0-13 compatible with standard reflow profiles for lead-free soldering?

Yes-the device is qualified for Pb-free reflow per J-STD-020, with a maximum peak temperature of 260°C. Its matte tin finish and alloy 42 leadframe ensure reliable wetting and intermetallic formation. Recommended profile includes ramp-to-spike rate ≤3°C/s, time above 217°C of 60–150 s, and peak exposure ≤260°C for ≤10 s.