Diodes Incorporated BZX84C20TS-7-F

Overview

BZX84C20TS-7-F from Diodes Incorporated is a triple-surface-mount Zener diode array with three isolated 20 V ±5% Zener elements in a single SOT-363 package, rated for 200 mW total power dissipation, 55 Ω dynamic impedance at 5 mA test current, and operating across –65°C to +150°C. It provides precision voltage regulation in compact power management circuits for portable instrumentation and low-power sensor interfaces.

For engineers reviewing the BZX84C20TS-7-F datasheet, BZX84C20TS-7-F pinout, BZX84C20TS-7-F application, or BZX84C20TS-7-F equivalent, key selection criteria include Zener voltage tolerance (±5%), reverse leakage (≤0.1 µA at 14 V), thermal resistance (625°C/W), and triple-diode isolation in ultra-small SOT-363.

Technical Context

This device integrates three independent Zener diodes sharing only mechanical packaging-no internal electrical coupling-enabling simultaneous voltage clamping or reference generation at identical or mixed Zener voltages within one footprint. Each element exhibits a nominal 20 V breakdown with ±5% tolerance and temperature coefficient of +14.4 to +18.0 mV/°C.

Designed for surface-mount assembly on FR4 PCBs using Diodes Inc.'s recommended pad layout, it supports stable regulation under pulsed conditions (IZT = 5 mA, f = 1 kHz) and maintains <0.1 µA reverse leakage up to 14 V, making it suitable for battery-backed voltage monitoring and low-quiescent-current bias networks.

Key Specifications

Pinout & Package

Package: SOT-363 - ultra-small plastic surface-mount case (2.2 × 1.3 × 0.9 mm), UL 94V-0 rated, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5242BS-7-F and BZX84C20LT1G, BZX84C20TS-7-F uniquely delivers three isolated 20 V Zeners in one SOT-363, enabling compact multi-rail regulation, redundancy, or mixed-voltage clamping unachievable with single-diode alternatives.

Availability

BZX84C20TS-7-F is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor interfaces, and low-power battery monitoring systems requiring stable component supply and long-term manufacturability.

Supply support for BZX84C20TS-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, specializing in high-reliability, energy-efficient components for industrial, computing, and consumer markets.

The BZX84C series belongs to Diodes Inc.'s precision Zener diode portfolio, engineered for stable voltage reference and overvoltage protection in space-constrained, thermally demanding applications.

FAQ

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

The BZX84C20TS-7-F has a nominal Zener voltage of 20.0 V with a guaranteed range of 18.8 V to 21.2 V at 5 mA test current. Its absolute maximum reverse voltage is defined by its breakdown characteristic-not a fixed "withstand" rating-and it begins regulating at the lower end of that range. Operation above 21.2 V risks exceeding its 200 mW power limit unless current is strictly limited.

Can all three Zener diodes be used simultaneously with different cathode connections?

Yes-each of the three Zener elements (A1/C1, A2/C2, A3/C3) is fully isolated. They may be biased independently with separate anode and cathode connections, enabling concurrent use at identical or distinct operating points. No internal coupling exists between elements, preserving signal integrity in multi-rail systems.

Is this device suitable for automotive applications?

While BZX84C20TS-7-F operates across –65°C to +150°C and meets RoHS requirements, it is not AEC-Q200 qualified. For non-safety-critical automotive subsystems (e.g., infotainment power supervision), it may be used with system-level validation; however, AEC-Q200-compliant alternatives are recommended for engine bay or ADAS applications.

How does the 625°C/W thermal resistance affect PCB layout?

A RθJA of 625°C/W means each milliwatt of dissipated power raises the junction temperature by 0.625°C above ambient. To maintain safe operation at full 200 mW, the PCB must provide adequate copper area and thermal vias per Diodes Inc.'s recommended SOT-363 pad layout-otherwise, junction temperatures may exceed 150°C even at room ambient.