Diodes Incorporated BZT52C9V1T-7

Overview

BZT52C9V1T-7 from Diodes Incorporated is a surface-mount Zener diode with a nominal zener voltage of 9.1 V, ±5.5% tolerance (8.5–9.6 V), 300 mW power dissipation, and SOD523 package. It regulates voltage in low-power biasing, reference, and overvoltage protection circuits for industrial sensors and portable power rails.

For engineers reviewing the BZT52C9V1T-7 datasheet, BZT52C9V1T-7 pinout, BZT52C9V1T-7 application, or BZT52C9V1T-7 equivalent, key selection criteria include zener voltage accuracy at 5 mA test current, 15 Ω dynamic impedance at 1 kHz, 0.5 µA reverse leakage at 6.0 V, and thermal resistance of 417 °C/W in standard FR-4 mounting.

Technical Context

This device operates as a precision voltage reference diode, conducting in reverse breakdown at a stable 9.1 V when biased above its knee voltage with ≥1.0 mA current. Its low 15 Ω zener impedance ensures minimal output variation under load changes, and its −3.5 to +7.0 mV/°C temperature coefficient enables predictable drift compensation in temperature-sensitive analog circuits.

The SOD523 package supports high-density PCB layouts with 0.001 g mass and JEDEC-compliant moisture sensitivity level 1. Thermal performance is characterized with 2 oz copper on FR-4 (1.92 mm² pad), delivering 417 °C/W junction-to-ambient resistance and enabling reliable operation from −55 °C to +150 °C.

Key Specifications

Pinout & Package

Package: SOD523 - ultra-compact surface-mount plastic package with cathode band marking; dimensions: 1.25 mm (E) × 0.85 mm (D) × 0.60 mm (A max); weight ≈ 0.001 g; moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5240BS-7-F and BZX584C9V1, BZT52C9V1T-7 uniquely balances 9.1 V precision, 300 mW capability, and 1.25 mm × 0.85 mm SOD523 footprint - making it optimal for space-limited, thermally constrained, and cost-sensitive industrial and portable applications.

Availability

BZT52C9V1T-7 is available at Aetrix Electronics and suitable for industrial sensor biasing, portable device power rail clamping, and automotive cabin control reference requiring stable component supply and consistent parametric performance across production lots.

Supply support for BZT52C9V1T-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 sales operations across Asia, Europe, and North America.

The BZT52 series belongs to Diodes' precision Zener diode product line, engineered for voltage regulation, reference, and overvoltage protection in space-constrained, high-reliability applications including automotive, industrial, and consumer electronics.

FAQ

What is the maximum reverse voltage (V_R) that BZT52C9V1T-7 can withstand before breakdown?

The device exhibits a sharp reverse breakdown at its nominal zener voltage of 9.1 V when tested at 5 mA. Below 6.0 V, reverse leakage remains ≤0.5 µA; no rated "maximum non-breakdown" voltage is specified, as Zener diodes are designed to operate in controlled reverse conduction, not blocking mode.

Does BZT52C9V1T-7 meet AEC-Q200 stress testing requirements for passive components?

No - BZT52C9V1T-7 is qualified to JEDEC reliability standards referenced in AEC-Q documents, but it is not an AEC-Q200-qualified part. For automotive-grade compliance, Diodes offers Q-suffix variants (e.g., BZT52C9V1TQ-7) manufactured in IATF 16949-certified facilities and PPAP-capable.

How does the SOD523 package affect thermal performance compared to SOD-123 or SOT-23?

In identical FR-4 mounting conditions, the SOD523's smaller pad area (1.92 mm²) results in higher junction-to-ambient thermal resistance (417 °C/W) versus SOT-23 (≈200 °C/W). This limits continuous power to 300 mW unless board layout adds thermal vias or copper pour to mitigate self-heating.

Can BZT52C9V1T-7 be used in place of a 9.1 V Zener in a linear regulator feedback network?

Yes - its 9.1 V nominal voltage, ±5.5% tolerance, and 15 Ω dynamic impedance make it suitable for feedback references in adjustable LDOs or shunt regulators. However, ensure minimum bias current ≥1 mA is maintained and verify temperature drift (−3.5 to +7.0 mV/°C) aligns with system accuracy targets.