Diodes Incorporated BZT52C4V7-13

Overview

BZT52C4V7-13 from Diodes Incorporated is a surface-mount 4.7 V Zener diode in SOD123 package, rated for 500 mW power dissipation at TL = +75°C and 370 mW at TA = +25°C, with 80 Ω maximum Zener impedance at 5 mA test current and ±3.5 mV/°C temperature coefficient - used for precision voltage reference and overvoltage protection in low-power DC rails.

For engineers reviewing the BZT52C4V7-13 datasheet, BZT52C4V7-13 pinout, BZT52C4V7-13 application, or BZT52C4V7-13 equivalent, key selection criteria include nominal Zener voltage tolerance (±6.4%), reverse leakage (3.0 µA @ 2.0 V), thermal resistance (338 °C/W junction-to-ambient), and AEC-Q101 qualification status for automotive-grade reliability.

Technical Context

This Zener diode operates in reverse breakdown to maintain stable voltage regulation across varying load currents from 1.0 mA to 20 mA. Its planar die construction ensures consistent Zener characteristics and low dynamic impedance under pulse and steady-state conditions.

The device exhibits a negative temperature coefficient of −3.5 mV/°C, enabling predictable drift compensation in temperature-sensitive references. It is optimized for automated SMT assembly with matte tin-plated terminals and J-STD-020 Level 1 moisture sensitivity rating.

Key Specifications

Pinout & Package

Two-terminal device in SOD123 plastic package with cathode band marking. Terminals are anode (unmarked end) and cathode (band-marked end); polarity must be observed for proper reverse-bias operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5225BS-7-F and BZX84-C4V7, BZT52C4V7-13 offers superior thermal performance (370 mW vs. ≤350 mW), identical Zener impedance, and verified AEC-Q101 qualification - making it the preferred choice for automotive and thermally demanding industrial applications.

Availability

BZT52C4V7-13 is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor signal conditioning, and embedded power supply monitoring requiring stable component supply and long-term lifecycle support.

Supply support for BZT52C4V7-13 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' general-purpose Zener diode product line, engineered for medium-current voltage regulation and transient suppression in cost-sensitive, high-volume applications such as power management and interface protection.

FAQ

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

The BZT52C4V7-13 has a nominal Zener voltage of 4.7 V with a guaranteed breakdown range of 4.4–5.0 V at 5 mA test current. It does not specify a separate "maximum reverse voltage" rating - operation above 5.0 V in reverse bias will sustain breakdown conduction, provided power dissipation remains within derated limits per the curve in Figure 1.

Is this part suitable for use in automotive applications?

Yes - BZT52C4V7-13 is explicitly qualified to AEC-Q101 standards for high-reliability automotive use, including under-hood and body electronics. Its SOD123 package, lead-free plating, and −65°C to +150°C operating temperature range meet stringent automotive environmental requirements.

How does the −3.5 mV/°C temperature coefficient affect circuit performance?

This negative coefficient means the Zener voltage decreases by 3.5 mV per degree Celsius rise in junction temperature. In a 4.7 V reference, this results in ~−0.075% per °C drift - acceptable for non-critical applications, but requires compensation or calibration in precision analog systems operating across wide temperature ranges.

Can this Zener be used in place of a 5.1 V part like BZT52C5V1?

No - BZT52C4V7-13 is not a drop-in replacement for 5.1 V Zeners. Its 4.7 V nominal voltage is 8% lower, which would shift reference thresholds, reset points, or clamp levels outside functional specifications. Substitution requires full circuit validation, including worst-case tolerance stack-up and thermal drift analysis.