Diodes Incorporated BZT585B7V5T-7

Overview

BZT585B7V5T-7 from Diodes Incorporated is a precision surface-mount Zener diode with nominal 7.5 V breakdown voltage (±2.0% tolerance), 10 Ω dynamic impedance at 5 mA test current, and 170 pF junction capacitance at 1 MHz/0 V. It operates across –65°C to +150°C, dissipates 350 mW on FR-4 PCB, and features cathode band marking in SOD523 package. Used for voltage regulation and reference in low-power analog sensor interfaces.

For engineers reviewing the BZT585B7V5T-7 datasheet, BZT585B7V5T-7 pinout, BZT585B7V5T-7 application, or BZT585B7V5T-7 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (357 °C/W), reverse leakage (1 µA @ 5 V), temperature coefficient (+3.8 mV/°C), and SOD523 footprint compatibility with high-density PCB layouts.

Technical Context

This Zener diode delivers stable voltage reference under reverse-biased operation with tightly controlled 7.35–7.65 V breakdown range at I_ZT = 5 mA. Its +3.8 mV/°C temperature coefficient ensures predictable drift in ambient-varying environments, while 10 Ω Zener impedance at 5 mA supports low-noise regulation in feedback paths.

The device uses alloy-42 leadframe with matte tin annealing for solderability per MIL-STD-202, Method 208, and meets AEC-Q101 for automotive-grade reliability. Its 0.001 g mass and SOD523 outline (1.6 × 0.8 × 0.6 mm) enable placement in space-constrained power management sections of portable electronics.

Key Specifications

Pinout & Package

Package: SOD523 - ultra-compact surface-mount plastic case (1.6 × 0.8 × 0.6 mm), flat lead design for low profile and improved thermal dissipation, cathode indicated by band marking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5227BS-7-F and BZX84-C7V5-7-F, BZT585B7V5T-7 offers tighter voltage control, lower dynamic impedance, smaller SOD523 footprint, and automotive-grade reliability-making it optimal for space-constrained, high-stability reference designs where long-term calibration drift must be minimized.

Availability

BZT585B7V5T-7 is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, automotive body control modules, and portable medical wearable power monitors requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for BZT585B7V5T-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.

BZT585 series belongs to Diodes' precision Zener diode product line, engineered for high-reliability voltage reference and regulation in automotive, industrial, and portable electronics where tight tolerance and thermal stability are critical.

FAQ

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

The BZT585B7V5T-7 has a nominal Zener voltage of 7.5 V with a guaranteed range of 7.35 V to 7.65 V at 5 mA test current. It begins controlled reverse conduction within this band and is not rated for sustained operation above 7.65 V without exceeding its power dissipation limit. Absolute maximum reverse voltage is defined by its 350 mW power rating and thermal environment.

Does this part require external current limiting in shunt regulator configurations?

Yes - like all Zener diodes, BZT585B7V5T-7 requires a series current-limiting resistor to set the operating Zener current between 1 mA and 50 mA. For stable 7.5 V regulation at 5 mA, the resistor value must be calculated based on input voltage, load current, and thermal derating above 25°C ambient per the published power derating curve.

Is the SOD523 package compatible with standard reflow profiles for lead-free assembly?

Yes - the SOD523 package uses matte tin–annealed alloy-42 leads qualified to MIL-STD-202, Method 208, and supports JEDEC J-STD-020D Level 1 moisture sensitivity. It is compatible with standard Pb-free reflow profiles (peak 260°C, 20–40 sec above 217°C), provided recommended pad layout (AP02001) and thermal relief patterns are followed.

How does the +3.8 mV/°C temperature coefficient affect accuracy over temperature?

At +3.8 mV/°C, the Zener voltage increases by 3.8 mV per degree Celsius rise from 25°C. Over a –40°C to +125°C range (165°C delta), this contributes ±0.627 V drift. Combined with ±2.0% initial tolerance (±0.15 V), total worst-case deviation is ±0.777 V - a design consideration requiring compensation in high-accuracy references.