Nexperia USA Inc. BZX8850-B36YL

Overview

BZX8850-B36YL from Nexperia is a low-current Zener diode in SOD882 (DFN1006-2) package, designed for precision voltage regulation at 36 V nominal with ±2 % tolerance. It delivers stable reference voltage at 50 µA test current, features 350 Ω differential resistance at 5 mA, and operates with ≤250 mW total power dissipation. Used in portable battery-powered sensor interfaces requiring low-bias, low-leakage voltage clamping.

For engineers reviewing the BZX8850-B36YL datasheet, BZX8850-B36YL pinout, BZX8850-B36YL application, or BZX8850-B36YL equivalent, this page provides verified electrical characteristics, thermal behavior, SOD882 footprint details, and real-world use cases for low-power analog signal conditioning and microcontroller supply rail stabilization.

Technical Context

This Zener diode operates in reverse breakdown mode to maintain a stable 36 V reference under low-current conditions (IZ = 50 µA to 5 mA). Its ±2 % tolerance and −0.05 mV/K temperature coefficient ensure tight regulation across industrial ambient temperatures (−55 °C to +150 °C).

The device exhibits 350 Ω dynamic impedance at 5 mA, 27.3 VZ drift over temperature, and 45 pF junction capacitance at VR = 0 V, f = 1 MHz - enabling predictable noise performance and fast transient response in feedback networks and overvoltage protection circuits.

Key Specifications

Pinout & Package

SOD882 (DFN1006-2) ultra-small leadless plastic package: 1.0 mm × 0.6 mm × 0.5 mm body, cathode marked by bar on top surface, optimized for high-density PCB layouts and reflow soldering.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C36 and MMSZ5241B, BZX8850-B36YL uniquely balances ultra-small size, ±2 % accuracy, and 50 µA operation - making it the sole choice for miniaturized, long-life, low-bias voltage reference applications where both precision and quiescent current are design-critical.

Availability

BZX8850-B36YL is available at Aetrix Electronics and suitable for portable sensor reference, microcontroller reset circuit, and low-power voltage monitor applications requiring stable component supply across extended production lifecycles.

Supply support for BZX8850-B36YL 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 with focus on efficiency and miniaturization.

The BZX8850 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for battery-powered and space-constrained applications demanding tight voltage tolerance and ultra-low test current operation.

FAQ

What is the maximum reverse voltage the BZX8850-B36YL can sustain before breakdown?

The BZX8850-B36YL has a nominal Zener voltage of 36 V with ±2 % tolerance, meaning its guaranteed breakdown range is 35.28 V to 36.72 V at IZ = 50 µA. It is not rated for sustained operation above 36.72 V in reverse bias; exceeding this risks irreversible thermal runaway due to its 250 mW power limit and 500 K/W thermal resistance.

Can BZX8850-B36YL be used in place of a 33 V Zener for overvoltage protection?

No - BZX8850-B36YL is specified for 36 V regulation and will not clamp reliably at 33 V. Its minimum breakdown voltage is 35.28 V, so it remains non-conductive below that threshold. For 33 V protection, use BZX8850-B33 (32.3–33.7 V range) or BZX8850-C33 (31.35–34.65 V), both validated in the same series with identical package and thermal specs.

Does the cathode marking on BZX8850-B36YL align with industry-standard polarity conventions?

Yes - the bar marking on the top surface of the DFN1006-2 package identifies Pin 1 as the cathode, consistent with JEDEC and IEC standards for Zener diodes. This matches the simplified outline in Table 2 and ensures correct orientation during automated placement; reversing polarity results in forward conduction (~0.9 V drop) instead of regulation.

How does thermal resistance affect BZX8850-B36YL performance in a compact PCB layout?

With Rth(j-a) = 500 K/W, dissipating 100 mW raises junction temperature by ~50 °C above ambient. On a minimal FR4 pad (single-sided copper), this limits continuous power to ~125 mW for Tj ≤ 125 °C. To maintain regulation accuracy and reliability, keep trace copper area ≥10 mm² per terminal or reduce average current below 200 µA in sealed enclosures above 60 °C ambient.