Diodes Incorporated BZX84C13S-7

Overview

BZX84C13S-7 from Diodes Incorporated is a surface-mount 13 V Zener diode in SOT-363 package, rated for 200 mW power dissipation, with nominal Zener voltage 13 V (min 12.4 V, max 14.1 V at 5 mA), Zener impedance 30 Ω at 5 mA and 170 Ω at 1 mA, and reverse current ≤0.1 µA at 8 V. It provides precision voltage regulation in compact power management circuits.

For engineers reviewing the BZX84C13S-7 datasheet, BZX84C13S-7 pinout, BZX84C13S-7 application, or BZX84C13S-7 equivalent, key selection criteria include Zener voltage tolerance, low leakage at bias voltages below V_Z, thermal resistance (625 °C/W), and compatibility with automated SMT assembly on FR4 PCBs using standard reflow profiles.

Technical Context

This dual-diode SOT-363 package contains two independent Zener diodes sharing no internal connection - confirmed by schematic diagram showing isolated C1/A1/A2/C2 terminals with NC pins. Each diode operates as a two-terminal voltage reference with specified breakdown characteristics at I_ZT = 5 mA and I_ZK = 1 mA.

Thermal derating begins immediately above 25 °C ambient, with full 200 mW rating only at T_A ≤ 25 °C and linear reduction to zero at ~150 °C per Fig. 1. The device exhibits negative temperature coefficient (−7.0 to +11.0 mV/°C) across its operating range, requiring circuit-level compensation in high-stability references.

Key Specifications

Pinout & Package

Package: SOT-363 (SC-70-6), 6-pin ultra-small outline surface-mount package with two isolated Zener diodes. Dimensions: 2.20 × 1.35 × 0.95 mm (L × W × H), moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84C13S-7, MMBZ5243BS-7-F offers higher power headroom at the cost of looser voltage tolerance, while BZX84C13LT1G delivers better thermal efficiency in single-diode applications but lacks dual-diode integration for space-constrained redundancy schemes.

Availability

BZX84C13S-7 is available at Aetrix Electronics and suitable for USB interface protection, ADC reference generation, redundant power monitoring, and microcontroller reset circuits requiring stable component supply and RoHS-compliant SMT packaging.

Supply support for BZX84C13S-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 facilities in China, Taiwan, and the US.

The BZX84C series belongs to Diodes' precision Zener voltage reference product line, engineered for compact, low-power regulation and protection in consumer, industrial, and communications equipment where SMT scalability and reliability are critical.

FAQ

What is the maximum reverse voltage (V_R) this diode can withstand before breakdown?

The BZX84C13S-7 has a nominal Zener voltage of 13 V, with guaranteed breakdown occurring between 12.4 V and 14.1 V at 5 mA test current. Its rated reverse voltage is not defined separately - operation below 12.4 V maintains leakage ≤0.1 µA at 8 V, and sustained bias above 14.1 V risks exceeding power limits unless current is strictly limited by external resistance.

Can both diodes in the SOT-363 package be used simultaneously in the same circuit?

Yes - the two Zener diodes are fully isolated, with separate anode/cathode terminals (C1/A1 and A2/C2) and no internal connection. They may be biased independently, used in complementary configurations (e.g., bidirectional clamp), or assigned to separate voltage rails, provided each observes its 200 mW power limit and thermal derating curve.

Is this part suitable for use in automotive applications?

Yes - the BZX84C13S-7 operates from −65 to +150 °C and meets J-STD-020D Level 1 moisture sensitivity, making it qualified for under-hood and infotainment modules. However, it is not AEC-Q200 stress-tested; for automotive-grade qualification, Diodes' AEC-Q200-compliant BZX84C13Q-7 is recommended.

How does the temperature coefficient affect regulation accuracy over temperature?

The BZX84C13S-7 exhibits a temperature coefficient ranging from −7.0 to +11.0 mV/°C at 5 mA. Over a 100 °C span (−40 to +60 °C), this introduces up to ±1.1 V drift in V_Z. For high-accuracy references, this must be compensated via circuit design (e.g., thermistor networks) or selected alongside diodes with opposing TC in matched pairs.