Taiwan Semiconductor Corporation BZX85C7V5

Overview

BZX85C7V5 from Taiwan Semiconductor is a 1.3W, ±5% tolerance Zener diode with nominal breakdown voltage of 7.5V, tested at 3mA, dynamic impedance of 200Ω at 0.5mA, and maximum leakage current of 1µA at 4.5V reverse bias - used for low-voltage stabilization in DC/DC converters and lighting circuits.

For engineers reviewing the BZX85C7V5 datasheet, BZX85C7V5 pinout, BZX85C7V5 application, or BZX85C7V5 equivalent, key selection criteria include Zener voltage tolerance, power dissipation capability, thermal resistance (130°C/W), junction temperature range (–65°C to +200°C), and DO-41 package compatibility with through-hole assembly.

Technical Context

The BZX85C7V5 operates as a single-die, hermetically sealed glass Zener diode optimized for stable voltage reference and shunt regulation in low-power linear circuits. Its 7.0V–7.9V V_Z range at 3mA test current and 200Ω Zener impedance at knee current support precise clamping under varying load conditions.

Designed for operation across –65°C to +200°C junction temperature, it delivers reliable performance in ambient-constrained environments such as onboard power supplies and LED driver stages, with thermal resistance R_θJA = 130°C/W enabling passive heatsinking in compact layouts.

Key Specifications

Pinout & Package

Package: DO-41 - axial-leaded, hermetically sealed glass case with cathode band marking; leads are pure tin plated, solderable per J-STD-002; weight ≈242 mg.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N4733A and MMBZ5227B, the BZX85C7V5 provides a unique balance of 7.5V nominal Zener voltage, 1.3W power rating, and DO-41 through-hole form factor - making it optimal for cost-sensitive, thermally robust, and mechanically standardized voltage reference implementations.

Availability

BZX85C7V5 is available at Aetrix Electronics and suitable for LED lighting drivers, low-voltage adapters, and on-board DC/DC converters requiring stable component supply with full traceability and RoHS compliance.

Supply support for BZX85C7V5 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

Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global industrial and consumer markets since 1979.

The BZX85C series belongs to TSC's general-purpose Zener diode product line, engineered for reliable voltage regulation and reference in cost-sensitive, high-volume power management applications.

FAQ

What is the Zener voltage tolerance of the BZX85C7V5?

The BZX85C7V5 has a nominal Zener voltage of 7.5V with a guaranteed tolerance of ±5%, meaning its actual breakdown voltage falls between 7.0V and 7.9V when tested at 3mA under pulse conditions. This tolerance is specified per Taiwan Semiconductor's H2301 datasheet revision and applies across the full operating temperature range.

What is the maximum power dissipation for the BZX85C7V5?

The BZX85C7V5 is rated for 1.3W maximum continuous power dissipation at 25°C ambient temperature. Derating is required above 25°C per the device's thermal resistance of 130°C/W, and absolute maximum junction temperature is +200°C. The device must be mounted with adequate PCB copper area to maintain safe thermal operation.

Is the BZX85C7V5 RoHS compliant?

Yes, the BZX85C7V5 is RoHS compliant per EU Directive 2011/65/EU. Taiwan Semiconductor confirms green compound encapsulation and lead-free terminations in accordance with RoHS requirements. The "G" suffix in ordering codes (e.g., BZX85C7V5 R0G) explicitly denotes RoHS-compliant packaging.

What package type does the BZX85C7V5 use?

The BZX85C7V5 uses the DO-41 axial-leaded package: hermetically sealed glass body, pure tin-plated leads compliant with J-STD-002, cathode identified by a painted band, and approximate weight of 242mg. Dimensions conform to ASME Y14.5M-1994 standards per drawing HQ2SD07-DO41-059 REV A.

How does the BZX85C7V5 perform at low test currents?

The BZX85C7V5 maintains regulation down to 0.5mA, with Zener impedance Z_ZK = 200Ω at that current - critical for low-power reference applications. Its leakage current is limited to 1µA at 4.5V reverse bias, ensuring minimal loading on high-impedance bias networks where the BZX85C7V5 is deployed.