Diodes Incorporated BZX84C7V5T-7-F

Overview

BZX84C7V5T-7-F from Diodes Incorporated is a 7.5 V, 150 mW surface-mount Zener diode in SOT-523 package, rated for 5 mA test current with 15 Ω typical zener impedance and ±5% voltage tolerance (7.0–7.9 V), used for precision voltage regulation and overvoltage protection in low-power analog and digital supply rails.

For engineers reviewing the BZX84C7V5T-7-F datasheet, BZX84C7V5T-7-F pinout, BZX84C7V5T-7-F application, or BZX84C7V5T-7-F equivalent, key selection criteria include zener voltage accuracy at 5 mA, thermal resistance (833 °C/W), reverse leakage (<1 µA at 5.0 V), temperature coefficient (+2.5 to +5.3 mV/°C), and SOT-523 footprint compatibility in space-constrained PCB designs.

Technical Context

This device operates as a two-terminal voltage reference using planar silicon junction technology, with breakdown initiated by avalanche mechanism above 6 V. Its zener voltage exhibits a positive temperature coefficient in the 7.5 V range, enabling stable regulation across –65 °C to +150 °C ambient conditions when derated per the 150 mW power curve.

The SOT-523 package enables high-density placement while maintaining thermal performance under FR-4 board mounting per Diodes Inc.'s recommended pad layout. Reverse leakage remains below 1.0 µA at VR = 5.0 V, supporting low-quiescent-current biasing in sensor interfaces and reference dividers.

Key Specifications

Pinout & Package

Package: SOT-523 - ultra-small plastic surface-mount case (1.60 mm × 0.80 mm × 0.50 mm), UL 94V-0 rated, moisture sensitivity level 1, lead-free matte tin plating.

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 and BZX84-C7V5,115, the BZX84C7V5T-7-F offers optimal balance of ultra-compact size, industry-standard SOT-523 compatibility, and sufficient regulation stability for low-power embedded references-without over-specifying power or footprint.

Availability

BZX84C7V5T-7-F is available at Aetrix Electronics and suitable for power supply reference, sensor bias network, and microcontroller reset circuit applications requiring stable component supply and consistent parametric performance across production lots.

Supply support for BZX84C7V5T-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, serving industrial, computing, consumer, and communications markets with a focus on reliability and efficiency.

The BZX84 series belongs to Diodes Inc.'s general-purpose Zener diode product line, designed specifically for cost-effective, space-efficient voltage regulation and protection in high-volume consumer and industrial electronics.

FAQ

What is the maximum reverse voltage this Zener can sustain before breakdown?

The BZX84C7V5T-7-F has a nominal zener voltage of 7.5 V with a guaranteed breakdown range of 7.0 V to 7.9 V at 5 mA test current. It does not specify a distinct "maximum reverse voltage" beyond this range; operation above 7.9 V at IZT will increase power dissipation and must remain within the 150 mW derated limit to avoid thermal runaway.

Can this device be used in place of a 6.8 V Zener for tighter regulation?

No - the BZX84C7V5T-7-F is strictly a 7.5 V device with ±0.45 V tolerance. Substituting it for a 6.8 V part would raise the regulated voltage by ~10%, potentially exceeding IC absolute maximum ratings. Use BZX84C6V8T-7-F instead, which has 6.8 V nominal and 6.4–7.2 V range.

Is the SOT-523 package compatible with standard reflow profiles?

Yes - the SOT-523 package is qualified for lead-free reflow per J-STD-020D Level 1 moisture sensitivity. Diodes Inc. specifies peak reflow temperatures up to 260 °C for 30 seconds, with ramp rates and soak profiles aligned with IPC-J-STD-020. No pre-baking is required.

Does this Zener exhibit significant capacitance that could affect high-frequency circuits?

At 7.5 V nominal, typical junction capacitance is ~15 pF (inferred from Fig. 4 trend: ~10 pF at 6 V, ~20 pF at 9 V). This is negligible for DC and low-speed analog use, but may load high-impedance nodes above 10 MHz. For RF bypass, a dedicated low-C TVS or capacitor is preferred.