My Inquiry
My Account
Nexperia USA Inc. BZX8850S-B51-QYL
- Part No.:
- BZX8850S-B51-QYL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-882
- Datasheet:
-
BZX8850S-B51-QYL.pdf
- Description:
- DIODE ZENER 51V 365MW DFN1006BD
- Quantity:
- Payment:
- Shipping:
Inventory:7,755
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX8850S-B51-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 51 V Zener voltage at 50 µA test current, with ±2 % tolerance (B-series), 365 mW total power dissipation, and AEC-Q101 qualification for automotive use.
For engineers reviewing the BZX8850S-B51-QYL datasheet, BZX8850S-B51-QYL pinout, BZX8850S-B51-QYL application, or BZX8850S-B51-QYL equivalent, this device is selected for ultra-low-bias voltage stabilization in battery-powered sensors, ECU input protection, and automotive infotainment power-rail monitoring where side-wettable flanks enable reliable solder-joint inspection.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified Zener voltage of 50.0 V to 52.0 V at IZ = 50 µA, exhibiting a temperature coefficient of +0.05 mV/K and differential resistance of 400 Ω at IZ = 2 mA. Its low 50 µA test current enables stable regulation under micro-power conditions.
The device uses a planar silicon process with side-wettable flanks on a DFN1006BD-2 (SOD882BD) package, supporting automated optical inspection (AOI) and reflow compatibility per IPC-J-STD-020. Junction-to-ambient thermal resistance is 340 K/W on FR4 PCB with single-sided copper.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 50.0 V to 52.0 V at IZ = 50 µA - defines precise regulation point for high-voltage reference rails |
| Tolerance | ±2 % (B-series) - ensures tight voltage accuracy without external trimming in production |
| Power Dissipation (Ptot) | 365 mW at Tamb ≤ 25 °C - supports continuous operation in thermally limited PCB layouts |
| Forward Voltage (VF) | ≤ 0.9 V at IF = 10 mA - minimizes conduction loss when used bidirectionally or in clamp configurations |
| Differential Resistance (rdiff) | 400 Ω at IZ = 2 mA - determines load regulation sensitivity and output impedance in feedback paths |
| Reverse Current (IR) | ≤ 0.05 µA at VR = 38.3 V - enables ultra-low standby leakage in always-on automotive modules |
| Package | DFN1006BD-2 (SOD882BD), 1.0 mm × 0.6 mm × 0.47 mm - enables <1 mm² board area usage in dense ADAS sensor nodes |
Pinout & Package
DFN1006BD-2 (SOD882BD) is a leadless, surface-mount plastic package with side-wettable flanks for automated optical solder-joint inspection. Dimensions: 1.0 mm × 0.6 mm × 0.47 mm body height; 0.65 mm pitch; cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity marker (bar) on top surface confirms orientation during placement |
| 2 | Anode (A) | Connected to ground or lower-potential rail; forms reverse-biased junction enabling Zener breakdown |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per JESD22 standards |
| Side-wettable flanks | Enables automated X-ray and AOI verification of solder fillet integrity on both sides of the package |
| Low 50 µA test current | Supports regulation in micropower systems (e.g., wake-up circuits) without compromising voltage stability |
| Optimized leakage profile | Intentional minor rise in leakage improves switching speed and reduces noise in transient suppression applications |
| Ultra-small footprint | 0.6 mm width allows placement between fine-pitch ICs in compact ECUs and telematics modules |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Voltage reference for analog-to-digital conversion of 12 V battery-sensed signals in BCM microcontrollers. IC Role / Device Role / Timing Role: Zener reference diode providing stable 51 V reference for internal ADC scaling and overvoltage detection thresholds. Use Value: Enables accurate battery health monitoring across −40 °C to +125 °C ambient with ±2 % initial tolerance and AEC-Q101 traceability. |
Use Scenario: Precision clamping of 4–20 mA loop transmitter outputs against supply rail transients. IC Role / Device Role / Timing Role: Reverse-biased Zener acting as overvoltage limiter on current-loop output stage. Use Value: Limits fault voltage to ≤52 V while drawing only 0.05 µA leakage at 38.3 V, preserving loop accuracy and minimizing power loss. |
| Portable Medical Diagnostic Device | Automotive Infotainment Power Sequencing |
Use Scenario: Low-power voltage reference for lithium-ion battery cell monitoring in handheld ultrasound units. IC Role / Device Role / Timing Role: Zener regulator supplying bias to high-impedance voltage dividers feeding fuel-gauge ICs. Use Value: Draws only 50 µA test current, extending battery life while maintaining 51 V reference accuracy within ±2 % over full medical temperature range. |
Use Scenario: Power-rail supervision and reset generation during cold-cranking events in head unit DC/DC converters. IC Role / Device Role / Timing Role: Zener-based threshold detector triggering system reset when 5 V rail drops below safe operating level. Use Value: Fast response due to optimized leakage profile ensures deterministic reset timing during 6–16 V brown-out conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX8850S-C51-Q | ±5 % tolerance (C-series) vs. ±2 % (B-series); identical VZ range, package, and AEC-Q101 rating | Suitable for non-critical biasing where cost reduction outweighs tighter voltage accuracy | Select when 51 V nominal regulation suffices and ±5 % drift is acceptable in final calibration |
| MMSZ5267BT1G | 51 V nominal, ±5 %, SOD-123 package (2.7 mm × 1.6 mm), 500 mW Ptot, not AEC-Q101 qualified | Higher power handling but larger footprint and no automotive qualification | Choose only for non-automotive industrial use requiring higher surge margin and manual inspection compatibility |
Compared with BZX8850S-B51-QYL, the C51-Q variant trades voltage accuracy for cost in automotive-qualified designs, while MMSZ5267BT1G offers higher power in a legacy package but lacks AEC-Q101 validation and occupies >7× more board area.
Availability
BZX8850S-B51-QYL is available at Aetrix Electronics and suitable for automotive electronics, portable medical instrumentation, and industrial sensor signal conditioning requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZX8850S-B51-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 delivering high-performance logic, discrete, and MOSFET devices, with leadership in efficiency, reliability, and miniaturization for automotive and industrial markets.
BZX8850S-Q belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for low-current, high-accuracy voltage regulation in space- and power-constrained automotive subsystems.
FAQ
What is the maximum reverse voltage before breakdown for BZX8850S-B51-QYL?
The device exhibits a nominal Zener voltage of 51 V, with guaranteed breakdown occurring between 50.0 V and 52.0 V at IZ = 50 µA. Below 38.3 V, reverse current remains ≤0.05 µA - confirming sharp knee behavior and minimal pre-breakdown leakage critical for precision sensing.
Can BZX8850S-B51-QYL be used in parallel for higher power handling?
No - Zener diodes exhibit negative temperature coefficients and parameter spread; paralleling causes current hogging and thermal runaway. For higher power, use a single higher-rated device like BZX8850S-B51-QYL's 365 mW rating or select a discrete 1 W Zener in SOD-123 with matched rdiff.
Is the cathode marking visible after reflow soldering?
Yes - the cathode is indicated by a laser-marked bar on the top surface of the DFN1006BD-2 package. Side-wettable flanks and the 0.3 mm height allow optical inspection of both the top mark and solder fillet geometry post-reflow, meeting IPC-A-610 Class 2 requirements.
Does BZX8850S-B51-QYL support bidirectional ESD protection?
No - it is a unidirectional Zener diode optimized for reverse-bias regulation. While forward conduction occurs below 0.9 V, its 200 mA absolute maximum forward current and lack of specified ESD ratings (e.g., IEC 61000-4-2) make it unsuitable as a dedicated ESD clamp; use purpose-built TVS diodes like PESD5V0S1BA for that function.
BZX8850S-B51-QYL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX8850S-Q
- Package/Case:
- SOD-882
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 51 V
- Tolerance:
- ±2%
- Power - Max:
- 365 mW
- Impedance (Max) (Zzt):
- 180 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 35.7 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DFN1006BD-2
BZX8850S-B51-QYL FAQ
1.How can I place an order for BZX8850S-B51-QYL through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8850S-B51-QYL on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for BZX8850S-B51-QYL reliable?
The price and inventory of BZX8850S-B51-QYL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8850S-B51-QYL is usually 5 days.
3.What payment methods are accepted for BZX8850S-B51-QYL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8850S-B51-QYL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8850S-B51-QYL?
BZX8850S-B51-QYL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8850S-B51-QYL order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for BZX8850S-B51-QYL?
For technical support, including BZX8850S-B51-QYL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8850S-B51-QYL requirements.
6.How does Aetrix verify that BZX8850S-B51-QYL is sourced from the original manufacturer or authorized distributors?
All BZX8850S-B51-QYL products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BZX8850S-B51-QYL meets industry standards.
7.What is the process for return or replacement of BZX8850S-B51-QYL?
All BZX8850S-B51-QYL units undergo pre-shipment inspection (PSI). If there is an issue with BZX8850S-B51-QYL, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The BZX8850S-B51-QYL part is unused and in its original packaging.
Return procedure for BZX8850S-B51-QYL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8850S-B51-QYL Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
