Nexperia USA Inc. BZX8850S-C5V1-QYL

Overview

BZX8850S-C5V1-QYL from Nexperia is a low-current Zener voltage regulator diode in the BZX8850S-Q series, designed for precision voltage reference and regulation in space-constrained, low-power circuits. It delivers a nominal 5.1 V Zener voltage at 50 µA test current, with ±5 % tolerance, 500 Ω typical differential resistance at 5 mA, and 365 mW total power dissipation - optimized for battery-powered portable electronics and automotive sensor interfaces.

For engineers reviewing the BZX8850S-C5V1-QYL datasheet, BZX8850S-C5V1-QYL pinout, BZX8850S-C5V1-QYL application, or BZX8850S-C5V1-QYL equivalent, key selection criteria include its ultra-small DFN1006BD-2 (SOD882BD) package with side-wettable flanks, AEC-Q101 qualification, low-leakage performance, and specified operation at 50 µA bias current for minimal quiescent power draw.

Technical Context

This Zener diode operates in reverse breakdown to maintain stable voltage under varying load and temperature conditions. Its 5.1 V nominal Zener voltage is specified at I_Z = 50 µA, with a temperature coefficient of −2.0 mV/K and differential resistance of ≤500 Ω at 5 mA, enabling predictable regulation in low-current analog monitoring paths.

The device features intentional minor leakage current optimization per AN90031 for improved switching speed and noise reduction in signal conditioning stages. It is qualified to AEC-Q101 and rated for ambient temperatures from −55 °C to +150 °C, supporting use in automotive engine control modules and body electronics where thermal robustness and reliability are critical.

Key Specifications

Pinout & Package

Package: DFN1006BD-2 (SOD882BD), ultra-small leadless surface-mount plastic package measuring 1.0 mm × 0.6 mm × 0.47 mm, with side-wettable flanks for automated optical solder-joint inspection.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX8850S-B5V1-Q, the C5V1-Q offers lower cost and leakage-optimized switching behavior at the expense of tolerance; versus MMSZ5231B-TP, it provides superior thermal performance, automotive qualification, and automated assembly support via side-wettable flanks - making it the preferred choice for new automotive and portable designs.

Availability

BZX8850S-C5V1-QYL is available at Aetrix Electronics and suitable for automotive cabin electronics, portable medical devices, and industrial IoT sensor nodes requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for BZX8850S-C5V1-QYL 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 specializing in high-performance, energy-efficient components for automotive, industrial, and consumer markets, with leadership in discrete and logic devices.

The BZX8850S-Q series belongs to Nexperia's automotive-grade Zener diode product line, engineered specifically for low-current, high-reliability voltage reference and regulation in thermally demanding, space-constrained applications.

FAQ

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

The BZX8850S-C5V1-QYL has a nominal Zener voltage of 5.1 V, with guaranteed breakdown occurring between 4.85 V and 5.36 V at 50 µA test current. Its absolute maximum non-repetitive peak reverse voltage is not defined separately - operation above 5.36 V risks exceeding power limits and thermal runaway, especially beyond 365 mW dissipation.

Does this part support reflow soldering with standard lead-free profiles?

Yes - the DFN1006BD-2 package is qualified for lead-free reflow soldering per JEDEC J-STD-020. Nexperia provides a dedicated footprint (Fig. 10) with 0.65 mm pitch, 0.8 mm pad length, and 0.6 mm pad width, optimized for void-free joint formation and side-wettable flank inspection using standard Class 3 IPC-7351B processes.

How does the "C" suffix differ from "B" in the BZX8850S-Q series?

The "C" suffix denotes ±5 % Zener voltage tolerance and incorporates intentional minor leakage current optimization (per AN90031) for faster switching and lower noise. The "B" suffix indicates ±2 % tolerance and standard leakage characteristics - making "C" variants more cost-effective and better suited for portable, low-bias applications where ultimate precision is secondary to efficiency and EMI performance.

Is thermal derating required above 25 °C ambient?

Yes - the 365 mW total power dissipation rating applies only at T_amb ≤ 25 °C on a single-sided FR4 PCB. Thermal resistance is 340 K/W junction-to-ambient, so power must be linearly derated by 1.06 mW/°C above 25 °C. At 85 °C ambient, maximum allowable dissipation drops to approximately 302 mW to maintain T_j ≤ 150 °C.