Nexperia USA Inc. BZX585-B2V7,115

Overview

BZX585-B2V7,115 from Nexperia is a ±2 % tolerance Zener diode in SOD523 (SC-79) package, rated for 2.7 V nominal Zener voltage at 5 mA, 300 mW total power dissipation, and 40 W non-repetitive peak reverse power. It serves as a precision voltage reference or low-power regulation element in space-constrained consumer and industrial power management circuits.

For engineers reviewing the BZX585-B2V7,115 datasheet, BZX585-B2V7,115 pinout, BZX585-B2V7,115 application, or BZX585-B2V7,115 equivalent, key selection criteria include its 2.7 V Zener voltage with ±2 % tolerance, ultra-small SOD523 footprint, low differential resistance (300 Ω typ. at I_Z = 5 mA), and thermal resistance of 65 K/W to solder point - critical for compact DC-DC feedback and overvoltage clamp designs.

Technical Context

This Zener diode operates in reverse breakdown mode with tightly controlled knee characteristics, enabling stable voltage regulation under low-current conditions (IZ = 1–5 mA). Its temperature coefficient of −1.4 mV/K (typ. at I_Z = 5 mA) supports predictable drift behavior across −65 °C to +150 °C junction temperature range.

The device features low forward voltage (1.1 V max at IF = 100 mA) and minimal junction capacitance (440 pF max at VR = 0 V, f = 1 MHz), making it suitable for both regulation and transient suppression roles where fast response and minimal signal loading are required.

Key Specifications

Pinout & Package

SOD523 (SC-79) ultra-small flat-lead surface-mount package: 1.25 mm × 0.85 mm body, 0.65 mm height, cathode marked by bar on top surface. Optimized for high-density layouts and reflow-compatible assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX585-C2V7,115, the BZX585-B2V7,115 delivers tighter voltage control essential for precision references; versus MMSZ5221B-7-F, it trades package size and power headroom for superior board-area efficiency and lower dynamic impedance in miniaturized systems.

Availability

BZX585-B2V7,115 is available at Aetrix Electronics and suitable for USB interface protection, microcontroller reset generation, low-power sensor biasing, and LED current setting requiring stable component supply and guaranteed traceability.

Supply support for BZX585-B2V7,115 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

Nexperia is a global semiconductor expert delivering high-performance, reliable discrete, logic, and MOSFET devices optimized for efficiency and miniaturization in high-volume electronics.

The BZX585 series belongs to Nexperia's general-purpose Zener diode product line, engineered specifically for space-constrained voltage regulation, reference, and clamping in consumer, computing, and industrial applications.

FAQ

What is the maximum continuous reverse current for BZX585-B2V7,115 at 25 °C ambient?

The maximum continuous reverse current is derived from its 300 mW total power dissipation rating and 2.7 V Zener voltage, yielding approximately 111 mA (300 mW ÷ 2.7 V). However, derating is required above 25 °C per the 350 K/W junction-to-ambient thermal resistance - actual usable current drops to ~75 mA at 60 °C ambient.

How does the cathode marking appear on the SOD523 package?

The cathode is indicated by a visible bar printed on the top surface of the SOD523 package, aligned with Pin 1. This marking matches the "K" designation in the pinning diagram and must be oriented toward the regulated voltage node during PCB layout.

Can BZX585-B2V7,115 be used in place of a 2.7 V TL431 shunt regulator?

No - the BZX585-B2V7,115 lacks the active feedback, adjustable reference, and sink-current capability of the TL431. It provides only passive Zener clamping with fixed 2.7 V breakdown and no internal amplification, making it unsuitable for precision programmable regulation but appropriate for simple voltage limiting or biasing.

What is the typical junction capacitance and how does it affect high-frequency performance?

Typical junction capacitance is 440 pF at VR = 0 V and f = 1 MHz. This value increases significantly as reverse voltage decreases toward zero, limiting use in RF or >10 MHz signal paths. For high-speed clamping, it is best applied in DC/low-frequency bias networks rather than data-line protection above 1 MHz.