Diodes Incorporated BZX84C7V5W-7-F

Overview

BZX84C7V5W-7-F from Diodes Incorporated is a 7.5 V, 200 mW surface-mount Zener diode in SOT-323 package, specified at 5 mA test current with ±0.5 V tolerance (7.0–7.9 V), 15 Ω dynamic impedance at 5 mA, and 1.0 µA reverse leakage at 5.0 V. It provides precision voltage regulation in low-power biasing and reference circuits.

For engineers reviewing the BZX84C7V5W-7-F datasheet, BZX84C7V5W-7-F pinout, BZX84C7V5W-7-F application, or BZX84C7V5W-7-F equivalent, key selection criteria include zener voltage tolerance, dynamic impedance at nominal test current, thermal resistance (625 K/W), reverse leakage at rated VR, and SOT-323 mechanical compatibility for high-density PCB layouts.

Technical Context

This device operates as a two-terminal voltage reference using planar silicon junction technology. Its breakdown behavior is characterized by a nominal zener voltage of 7.5 V at 5 mA, with temperature coefficient ranging from +2.5 to +5.3 mV/°C - indicating positive drift over temperature.

It delivers stable regulation under DC or low-frequency conditions, with maximum power dissipation limited to 200 mW at 25°C ambient and derated linearly above 25°C per the published curve. Reverse capacitance is not specified for this variant but falls within typical 10–100 pF range for 7–8 V Zeners per family data.

Key Specifications

Pinout & Package

SOT-323 package with three terminals: anode (pin 1), cathode (pin 2), and no internal connection (pin 3). Cathode is marked by a band on the top surface; polarity follows standard Zener diode convention (cathode is the regulated terminal).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5236BS-7-F, BZX84C7V5W-7-F offers lower cost and sufficient performance for low-current references, while BZX84-C7V5,315 trades package compatibility for identical electrical specs - making the original ideal for space-constrained SOT-323 designs needing proven reliability.

Availability

BZX84C7V5W-7-F is available at Aetrix Electronics and suitable for voltage reference design, overvoltage protection circuits, and low-power LDO feedback networks requiring stable component supply and consistent Zener characteristics across production batches.

Supply support for BZX84C7V5W-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 and manufacturing operations across Asia and the Americas.

This part belongs to the BZX84C series of surface-mount Zener diodes, engineered for compact, high-reliability voltage regulation in consumer, industrial, and computing applications where space and environmental compliance are critical.

FAQ

What is the maximum reverse voltage (V_R) at which leakage current is guaranteed?

The datasheet specifies 1.0 µA maximum reverse leakage current at V_R = 5.0 V. This value is measured and guaranteed per production test; it does not apply at voltages near or above the zener breakdown threshold. At V_R = 7.0 V (minimum V_Z), leakage rises sharply into the breakdown region and is no longer characterized as "reverse leakage" but as zener conduction.

Is BZX84C7V5W-7-F suitable for use in automotive applications?

Yes - its operating temperature range of −65°C to +125°C meets AEC-Q200 Grade 3 requirements for passive components. However, Diodes Incorporated does not qualify this specific part under AEC-Q200; users must perform system-level validation including thermal cycling and humidity testing to confirm suitability for automotive ECUs or body control modules.

How does the temperature coefficient affect regulation accuracy over temperature?

The temperature coefficient ranges from +2.5 to +5.3 mV/°C at I_ZT = 5 mA. Over a 100°C span (−25°C to +75°C), this introduces up to ±0.53 V drift in V_Z, or ~7% of nominal voltage. For precision references, this drift must be compensated in system calibration or mitigated with temperature-stable circuit topologies.

Can BZX84C7V5W-7-F replace a through-hole 1N4734A in an existing design?

No - the 1N4734A is a 5.6 V, 1 W through-hole Zener in DO-41 package. BZX84C7V5W-7-F has different voltage (7.5 V), power rating (200 mW), package (SOT-323), and thermal behavior. Direct replacement would require verifying voltage compatibility, recalculating power dissipation margins, and modifying PCB layout for SMT assembly.