Diodes Incorporated BZT52C7V5T-7

Overview

BZT52C7V5T-7 from Diodes Incorporated is a surface-mount Zener diode with a nominal zener voltage of 7.5 V, ±6.7% tolerance (7.0–7.9 V), 300 mW power dissipation, 15 Ω dynamic impedance at 5 mA test current, and SOD523 package. It provides precise voltage regulation in low-power biasing, reference, and overvoltage protection circuits for consumer, industrial, and automotive electronics.

For engineers reviewing the BZT52C7V5T-7 datasheet, BZT52C7V5T-7 pinout, BZT52C7V5T-7 application, or BZT52C7V5T-7 equivalent, key selection criteria include zener voltage accuracy, thermal resistance (417 °C/W), reverse leakage (1.0 µA @ 5.0 V), temperature coefficient (+2.5 mV/°C), and JEDEC-qualified reliability for high-stability designs.

Technical Context

This Zener diode operates in reverse breakdown to maintain a stable reference voltage across its terminals under controlled current conditions. Its 7.5 V nominal zener voltage is specified at 5 mA test current, with dynamic impedance of 15 Ω and knee impedance of 80 Ω at 1.0 mA - indicating sharp, predictable turn-on behavior suitable for precision clamping and analog reference functions.

The device uses a planar epitaxial construction in a molded plastic SOD523 package with matte tin–annealed alloy 42 leads. Thermal performance is characterized by R_θJA = 417 °C/W on FR-4 board (2 oz Cu, 1.92 mm² pad), enabling operation from –55 °C to +150 °C ambient without derating below 100 °C.

Key Specifications

Pinout & Package

Package: SOD523 - ultra-compact surface-mount plastic package with cathode band marking; dimensions: D = 0.75–0.85 mm, E = 1.15–1.25 mm, He = 1.55–1.65 mm, weight ≈ 0.001 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMSZ5235B-7-F and BZX584C7V5, the BZT52C7V5T-7 offers tighter thermal resistance (417 vs. ~350 °C/W), smaller SOD523 footprint, and lower dynamic impedance - making it optimal for space-constrained, low-drift reference designs where 300 mW suffices.

Availability

BZT52C7V5T-7 is available at Aetrix Electronics and suitable for USB port protection, microcontroller reset circuits, ADC reference stabilization, and LED current biasing requiring stable component supply, JEDEC-qualified reliability, and RoHS 3 compliance.

Supply support for BZT52C7V5T-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, manufacturing, and distribution operations across Asia, Europe, and the Americas.

The BZT52 series belongs to Diodes' general-purpose Zener diode product line, engineered for precision voltage regulation in compact, high-reliability applications - especially where low-profile packaging, tight voltage tolerance, and automotive-qualifiable process control are critical.

FAQ

What is the maximum reverse leakage current for BZT52C7V5T-7 at 5.0 V?

The maximum reverse leakage current is 1.0 µA at V_R = 5.0 V and T_A = +25°C, per the Electrical Characteristics table in DS30502 Rev. 18–2. This value increases with temperature - e.g., to ~10 µA at +125°C - and must be accounted for in ultra-low-power designs.

Can BZT52C7V5T-7 be used in automotive applications?

Yes - the BZT52C7V5T-7 is qualified to JEDEC standards referenced in AEC-Q200 and manufactured in IATF 16949 certified facilities. For formal PPAP submission or AEC-Q101 qualification, the Q-suffix automotive grade variant (e.g., BZT52C7V5TQ-7) should be selected per Diodes' automotive product listing.

What is the thermal resistance from junction to ambient for this device?

R_θJA is 417 °C/W when mounted on a single-sided FR-4 PCB with 2 oz copper and a 1.92 mm² pad area, as defined in Note 6 of the datasheet. This value assumes natural convection and no additional copper pour; adding thermal vias or ground planes can reduce effective R_θJA by 15–25%.

How does the temperature coefficient affect voltage regulation accuracy?

The temperature coefficient is +2.5 mV/°C, meaning V_Z increases by 2.5 mV per degree Celsius rise in junction temperature. Over a –40 °C to +125 °C range, this introduces ±412.5 mV drift - requiring thermal design or calibration if sub-1% regulation accuracy is needed across full temperature range.