Diodes Incorporated BZX84C3V3S-7

Overview

BZX84C3V3S-7 from Diodes Incorporated is a dual 200 mW surface-mount Zener diode in SOT-363 package, with nominal zener voltage 3.3 V (±0.2 V tolerance), 5 mA test current, 95 Ω max zener impedance at I_ZT, and 5.0 µA max reverse leakage at 1.0 V. It provides precision voltage reference and overvoltage clamping in space-constrained power management circuits.

For engineers reviewing the BZX84C3V3S-7 datasheet, BZX84C3V3S-7 pinout, BZX84C3V3S-7 application, or BZX84C3V3S-7 equivalent, key selection criteria include zener voltage accuracy at low test current, thermal resistance (625 °C/W), ultra-small SOT-363 footprint, and RoHS-compliant matte tin plating for reflow compatibility.

Technical Context

This dual-element Zener diode integrates two independent 3.3 V zener junctions in a single SOT-363 package, enabling compact dual-rail voltage regulation or bidirectional transient suppression. Each element operates with 5.0 mA zener test current and exhibits matched electrical characteristics across temperature (–65 °C to +150 °C).

The device uses planar die construction for stable breakdown behavior and low dynamic impedance (95 Ω typical at 1 kHz). Its 200 mW power dissipation is derated linearly above 25 °C ambient per the published curve, with 625 °C/W junction-to-ambient thermal resistance on FR4 board with recommended pad layout.

Key Specifications

Pinout & Package

SOT-363 is a 6-pin ultra-small outline transistor package with dual-channel symmetry. Pin 1 (NC) and Pin 6 (NC) are no-connect terminals; Pin 2 (C1) and Pin 5 (C2) are cathodes; Pin 3 (A1) and Pin 4 (A2) are anodes - enabling independent or series-connected dual-Zener configurations.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5226BS-7-F and BZX84C3V3LT1G, BZX84C3V3S-7 uniquely delivers dual 3.3 V Zener functions in minimal area-critical for space-constrained dual-rail systems where board real estate outweighs marginal power advantage.

Availability

BZX84C3V3S-7 is available at Aetrix Electronics and suitable for USB interface protection, low-voltage microcontroller reference design, and industrial 4–20 mA loop power supply applications requiring stable component supply and long-term manufacturability.

Supply support for BZX84C3V3S-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 centers across Asia and manufacturing in China, Taiwan, and the U.S.

The BZX84C series belongs to Diodes' precision Zener diode product line, engineered specifically for voltage regulation, reference, and transient suppression in consumer, industrial, and automotive electronics where small size and tight voltage tolerance are essential.

FAQ

What is the maximum allowable reverse voltage before breakdown for BZX84C3V3S-7?

The rated zener voltage is 3.3 V nominal, with guaranteed breakdown occurring between 3.1 V and 3.5 V at 5 mA test current. Below 3.1 V, reverse current remains ≤5.0 µA at 1.0 V - well within non-breakdown region. Operation below 3.1 V is safe for clamping or biasing without conduction.

Can BZX84C3V3S-7 be used in series or parallel configurations?

Yes - its dual-element structure supports series connection (cathode-to-anode) for 6.6 V reference, or parallel anode/cathode use for enhanced current handling. However, due to process-matched but not laser-trimmed elements, series use yields ±12% total tolerance; parallel use requires external balancing resistors to prevent current hogging.

Is the SOT-363 package compatible with standard automated pick-and-place equipment?

Yes - the SOT-363 package has standardized dimensions (2.2 mm × 1.35 mm × 1.1 mm height) and 0.65 mm lead pitch, fully supported by Fuji CP7, Yamaha YSM20, and Mycronic MYPro platforms using standard 0.4 mm nozzle and vision calibration. No special tooling is required.

Does BZX84C3V3S-7 meet AEC-Q200 stress testing requirements for automotive use?

No - while rated for –65 °C to +150 °C operating temperature, BZX84C3V3S-7 is not AEC-Q200 qualified. For automotive cabin applications, it may be used in non-safety-critical subsystems (e.g., infotainment UI lighting), but design validation per customer-specific reliability protocols is required prior to deployment.