Diodes Incorporated BZX84C4V3TS-7-F

Overview

BZX84C4V3TS-7-F from Diodes Incorporated is a triple-surface-mount Zener diode array with three isolated 4.3 V ±0.3 V (nominal) Zener elements in a single SOT-363 package, rated for 200 mW total power dissipation and 5 mA test current, used for precision voltage regulation and overvoltage protection in compact DC power rails.

For engineers reviewing the BZX84C4V3TS-7-F datasheet, BZX84C4V3TS-7-F pinout, BZX84C4V3TS-7-F application, or BZX84C4V3TS-7-F equivalent, key selection criteria include Zener voltage tolerance (±0.3 V), low dynamic impedance (90 Ω at 5 mA), thermal resistance (625 °C/W), and RoHS-compliant lead-free plating on an ultra-small footprint.

Technical Context

This device integrates three independent Zener diodes sharing only mechanical packaging-no internal electrical coupling-enabling simultaneous regulation of multiple low-current bias or reference nodes. Each element exhibits a nominal Zener voltage of 4.3 V with ±7% tolerance (4.0–4.6 V), tested at I_ZT = 5 mA.

It operates across –65 °C to +150 °C, with temperature coefficient ranging from –3.5 to 0 mV/°C, and maintains stable reverse breakdown under pulsed conditions per short-duration test methodology. Maximum reverse leakage is 3.0 µA at 1.0 V.

Key Specifications

Pinout & Package

SOT-363 (SC-70-6) ultra-small surface-mount package with six terminals: three anodes and three cathodes arranged as three isolated diode pairs. Molded plastic case meets UL 94V-0 flammability rating and J-STD-020D Level 1 moisture sensitivity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5229BS-7-F and BZX84C4V3LT1G, BZX84C4V3TS-7-F uniquely delivers three isolated 4.3 V Zeners in one SOT-363 footprint-reducing component count, PCB area, and assembly cost where multi-node clamping or referencing is required.

Availability

BZX84C4V3TS-7-F is available at Aetrix Electronics and suitable for USB interface protection, microcontroller I/O clamping, industrial sensor reference generation, and low-power RTC backup circuits requiring stable component supply and consistent parametric performance.

Supply support for BZX84C4V3TS-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.

This part belongs to the BZX84C series of triple Zener diode arrays designed specifically for space-constrained, multi-rail voltage regulation and transient suppression in portable, automotive, and industrial electronics.

FAQ

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

The BZX84C4V3TS-7-F has a nominal Zener voltage of 4.3 V, with guaranteed breakdown occurring between 4.0 V and 4.6 V at 5 mA test current. It is not rated for sustained reverse operation below this range; applied reverse voltages less than 4.0 V result in leakage currents ≤3.0 µA at 1.0 V, per datasheet specifications.

Can this device be used in series or parallel configurations with other Zeners?

No - the BZX84C4V3TS-7-F contains three electrically isolated Zener elements in one package, but its internal structure does not support series or parallel connection of its own terminals. Interconnecting A1/C1 with A2/C2 would violate isolation and cause unpredictable breakdown behavior; external series/parallel use requires discrete devices with matched characteristics.

Is the SOT-363 package compatible with standard reflow soldering profiles?

Yes - the SOT-363 package is rated for moisture sensitivity Level 1 per J-STD-020D and supports standard lead-free reflow profiles. Its matte tin plating and UL 94V-0 mold compound ensure reliable wetting and thermal stability up to peak temperatures of 260 °C, provided recommended pad layout (per Diodes Inc. AP02001) is followed.

How does temperature affect the Zener voltage in practical operation?

The temperature coefficient ranges from –3.5 to 0 mV/°C at 5 mA, meaning the Zener voltage decreases slightly as temperature rises. Over the full –65 °C to +150 °C range, total drift is bounded and predictable - for example, a 100 °C rise from 25 °C yields up to ~350 mV drop, making it suitable for non-critical references but not high-precision voltage standards.