Diodes Incorporated BZX84C5V6W-7

Overview

BZX84C5V6W-7 from Diodes Incorporated is a 5.6 V, 200 mW surface-mount Zener diode in SOT-323 package, rated for 5 mA test current with 40 Ω dynamic impedance and ±0.4 V zener voltage tolerance (5.2–6.0 V), used for precision voltage reference and overvoltage protection in low-power analog circuits.

For engineers reviewing the BZX84C5V6W-7 datasheet, BZX84C5V6W-7 pinout, BZX84C5V6W-7 application, or BZX84C5V6W-7 equivalent, key selection criteria include zener voltage accuracy at 5 mA, thermal resistance (625 K/W), reverse leakage (<1.0 µA at 2.0 V), temperature coefficient (+2.5 mV/°C), and RoHS-compliant green molding compound compatibility with automated SMT assembly.

Technical Context

This Zener diode operates in reverse breakdown mode to maintain stable voltage regulation across varying load currents. Its planar die construction ensures consistent breakdown characteristics, while the SOT-323 package enables high-density PCB layouts with minimal thermal mass.

It exhibits a positive temperature coefficient of +2.5 mV/°C at 5 mA, indicating voltage increases with ambient temperature - critical for biasing stability in temperature-sensitive references. Maximum power dissipation is derated linearly above 25°C per the 625 K/W junction-to-ambient thermal resistance.

Key Specifications

Pinout & Package

SOT-323 package with anode-cathode-anode terminal configuration (pin 1 = anode, pin 2 = cathode, pin 3 = anode); molded plastic case rated UL 94V-0, lead-free matte tin plating, polarity indicated by cathode band on top view.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5232BS-7-F and 1SMA5919BT3G, BZX84C5V6W-7 offers optimal balance of precision (±0.4 V), compactness (SOT-323), and process compatibility (MSL-1, lead-free), making it preferred for space-constrained, low-power analog designs requiring stable 5.6 V regulation.

Availability

BZX84C5V6W-7 is available at Aetrix Electronics and suitable for low-power voltage reference, GPIO protection, current-limited bias supply, and temperature-compensated reference generator applications requiring stable component supply and full traceability.

Supply support for BZX84C5V6W-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 in China, Taiwan, and the U.S.

The BZX84 series belongs to Diodes' general-purpose Zener diode product line, engineered specifically for cost-sensitive, high-volume consumer and industrial applications demanding reliable voltage regulation in ultra-compact packages.

FAQ

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

The BZX84C5V6W-7 has a nominal zener voltage of 5.6 V, with guaranteed breakdown occurring between 5.2 V and 6.0 V at 5 mA test current. It is not rated for reverse blocking above its specified zener range - sustained voltage beyond 6.0 V risks thermal runaway if power dissipation exceeds 200 mW. The device is designed exclusively for controlled reverse-bias operation within its zener region.

Does this part require derating at elevated ambient temperatures?

Yes - power dissipation must be linearly derated above 25°C ambient using the 625 K/W thermal resistance. For example, at 75°C ambient, maximum allowable power drops to 100 mW (200 mW × [1 − (75−25)/625]). Derating follows the curve in Figure 1 of DS30066 Rev. 15-2 and assumes use of Diodes Incorporated's recommended SOT-323 pad layout on FR4.

Is the SOT-323 package compatible with standard reflow soldering profiles?

Yes - the BZX84C5V6W-7 is qualified for lead-free reflow per JEDEC J-STD-020D, with Moisture Sensitivity Level 1 (no dry-bake required). Its matte tin finish and SOT-323 geometry are fully compatible with peak temperatures up to 260°C and standard SAC305 thermal profiles, provided board-level thermal mass and conveyor speed align with IPC-A-610 Class 2 guidelines.

How does the +2.5 mV/°C temperature coefficient affect circuit performance?

The +2.5 mV/°C coefficient means the zener voltage increases by 2.5 mV per degree Celsius rise in junction temperature. Over a 50°C ambient range (25–75°C), this produces ~125 mV total drift. In precision references, this must be compensated via circuit topology (e.g., matched diode pairs) or calibrated out in firmware; it is not a defect but a defined, repeatable parameter for design modeling.