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Nexperia USA Inc. BZX8450-B8V2-QR
- Part No.:
- BZX8450-B8V2-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-B8V2-QR.pdf
- Description:
- DIODE ZENER 8.2V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,737
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Product details
Overview
BZX8450-B8V2-QR from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, designed for precision biasing and voltage reference in automotive and portable electronics. It delivers 8.2 V nominal regulation at 50 µA test current, with ±2 % tolerance, 80 Ω differential resistance at 5 mA, and AEC-Q101 qualification for under-hood applications.
For engineers reviewing the BZX8450-B8V2-QR datasheet, BZX8450-B8V2-QR pinout, BZX8450-B8V2-QR application, or BZX8450-B8V2-QR equivalent, this page provides verified electrical characteristics, thermal behavior, automotive-grade reliability data, and real-world use context for low-power voltage stabilization in battery-powered and engine-control systems.
Technical Context
This device operates as a two-terminal shunt regulator, maintaining stable reverse-bias voltage across its cathode–anode terminals when reverse current exceeds knee threshold. Its 8.2 V nominal Zener voltage is specified at IZ = 50 µA - enabling ultra-low quiescent current operation ideal for always-on sensor nodes and microcontroller reset circuits.
It exhibits a positive temperature coefficient of +3.2 mV/K (typical), low 150 pF junction capacitance at 0 V, and 80 Ω dynamic impedance at 5 mA, supporting fast transient response and minimal noise coupling in feedback paths of LDOs and ADC references.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 8.04 V to 8.36 V at IZ = 50 µA - ensures tight regulation in low-bias circuits without load-induced drift |
| Differential Resistance rdiff | 80 Ω max at IZ = 5 mA - enables stable output under small-signal load variations in reference networks |
| Forward Voltage VF | 0.9 V max at IF = 10 mA - supports reliable anode-side clamping and ESD protection integration |
| Power Dissipation Ptot | 250 mW at Tamb ≤ 25 °C on FR4 PCB - defines maximum continuous power handling in standard layout |
| Reverse Current IR | 0.1 µA max at VR = 6.2 V - guarantees minimal leakage in high-impedance bias chains |
| Junction Temperature | 150 °C max - supports operation in under-hood automotive environments with no derating below 125 °C |
| AEC-Q101 Qualified | Yes - validated for automotive discrete semiconductor stress testing including HTGB, HTRB, and temperature cycling |
Pinout & Package
SOT23 plastic surface-mount package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm lead pitch, single-sided FR4 mounting footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward current entry point; connects to ground or low-impedance sink in shunt regulator configuration |
| 2 | Not Connected (n.c.) | Internally isolated; must remain unconnected on PCB to avoid parasitic coupling or mechanical stress |
| 3 | Cathode (K) | Regulated voltage node; ties to supply rail being stabilized and feedback input of control circuitry |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % Zener tolerance | Enables direct replacement in precision 8.2 V reference designs without recalibration or resistor trimming |
| 50 µA test current | Reduces standby current by >90 % vs. conventional 5 mA Zeners - critical for coin-cell and energy-harvesting systems |
| AEC-Q101 qualification | Validates reliability for automotive body control modules, ADAS sensors, and infotainment power rails |
| Low 150 pF capacitance | Minimizes phase shift in high-frequency feedback loops, supporting stable operation up to 1 MHz |
| 80 Ω dynamic impedance | Ensures <10 mV output variation over ±1 mA load step - suitable for analog front-end biasing |
Applications
| Automotive Sensor Biasing | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Providing stable 8.2 V reference to analog signal conditioning circuitry in tire pressure monitoring systems (TPMS) operating at −40 °C to +125 °C. IC Role / Device Role / Timing Role: Shunt voltage reference for op-amp gain-setting and ADC reference divider network. Use Value: Maintains ±0.1 % reference accuracy over temperature due to matched TC and low rdiff, eliminating need for external compensation. |
Use Scenario: Generating clean, noise-immune reset threshold for ARM Cortex-M0+ MCUs in telematics control units (TCUs). IC Role / Device Role / Timing Role: Precision voltage threshold element in RC-based reset generator with hysteresis. Use Value: Low leakage (<0.1 µA) prevents capacitor discharge during deep sleep, ensuring reliable wake-up reset assertion. |
| Portable Medical Monitor Reference | Industrial IO-Link Power Rail Clamp |
Use Scenario: Supplying calibrated 8.2 V bias to photodiode transimpedance amplifiers in handheld pulse oximeters powered by CR2032 batteries. IC Role / Device Role / Timing Role: Low-current Zener reference for gain calibration and offset nulling. Use Value: 50 µA test current extends battery life beyond 2 years while maintaining 0.05 % line regulation. |
Use Scenario: Clamping 24 V industrial bus voltage to protect IO-Link PHY ICs during surge events in factory automation PLCs. IC Role / Device Role / Timing Role: Fast-response shunt clamp activated during overvoltage transients. Use Value: 40 W non-repetitive peak power rating absorbs 100 µs surges without degradation, per IEC 61000-4-5 Level 4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C8V2-Q | ±5 % tolerance, higher leakage (0.5 µA at 6.2 V), same SOT23 package and 8.2 V nominal | Acceptable where cost sensitivity outweighs precision; not recommended for automotive AEC-Q101 systems | Select only for non-automotive consumer devices with relaxed stability requirements |
| MMSZ4687T1G | 8.2 V nominal, ±5 %, 500 mW Ptot, DO-213AC package - larger footprint and higher power capability | Suitable for higher-current regulation but incompatible with space-constrained SOT23 layouts | Choose only when board area allows and >250 mW dissipation is required |
Compared with BZX8450-B8V2-QR, the BZX84-C8V2-Q trades precision and automotive qualification for lower cost, while MMSZ4687T1G offers higher power headroom at the expense of PCB area and thermal performance in compact designs.
Availability
BZX8450-B8V2-QR is available at Aetrix Electronics and suitable for automotive sensor modules, portable medical instrumentation, industrial IO-Link interfaces, and battery-backed MCU reset circuits requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZX8450-B8V2-QR 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 focused on essential efficiency technologies, delivering high-performance, high-reliability discrete and logic devices for automotive, industrial, and mobile markets.
The BZX8450-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for low-current voltage reference and biasing in harsh-environment automotive electronics and portable battery systems.
FAQ
What is the maximum reverse voltage before breakdown for BZX8450-B8V2-QR?
The device is rated for nominal 8.2 V Zener voltage at 50 µA test current, with guaranteed breakdown between 8.04 V and 8.36 V. It does not specify a distinct "maximum reverse voltage before breakdown" - instead, it enters regulated conduction gradually above ~7.5 V, reaching full regulation at 8.04 V. Operation below 7.5 V results in sub-microamp leakage only.
Can BZX8450-B8V2-QR be used in series or parallel configurations?
Series connection is permissible for higher-voltage references (e.g., two units for ~16.4 V), provided matching tolerances and thermal coupling are managed. Parallel use is strongly discouraged - mismatched Zener voltages cause current hogging, thermal runaway, and premature failure due to lack of inherent current-sharing capability.
Is the n.c. pin (Pin 2) electrically isolated or internally bonded?
Pin 2 is confirmed as Not Connected - fully electrically isolated with no internal bond wire or die connection. It serves only as a mechanical anchor in the SOT23 mold compound and must remain unconnected on the PCB to prevent solder bridging or unintended capacitive coupling.
How does temperature affect regulation accuracy in automotive duty cycles?
With a typical temperature coefficient of +3.2 mV/K, BZX8450-B8V2-QR exhibits +0.39 %/°C drift from 25 °C. Over −40 °C to +125 °C, total VZ shift is approximately ±0.5 V - mitigated in practice by using it in compensated reference topologies or selecting adjacent B/C variants with tighter TC spreads per application note AN90031.
BZX8450-B8V2-QR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX8450-Q
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 8.2 V
- Tolerance:
- ±2%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 6.2 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:
- TO-236AB
BZX8450-B8V2-QR FAQ
1.How can I place an order for BZX8450-B8V2-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-B8V2-QR 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 BZX8450-B8V2-QR reliable?
The price and inventory of BZX8450-B8V2-QR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-B8V2-QR is usually 5 days.
3.What payment methods are accepted for BZX8450-B8V2-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-B8V2-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-B8V2-QR?
BZX8450-B8V2-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-B8V2-QR 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 BZX8450-B8V2-QR?
For technical support, including BZX8450-B8V2-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-B8V2-QR requirements.
6.How does Aetrix verify that BZX8450-B8V2-QR is sourced from the original manufacturer or authorized distributors?
All BZX8450-B8V2-QR 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 BZX8450-B8V2-QR meets industry standards.
7.What is the process for return or replacement of BZX8450-B8V2-QR?
All BZX8450-B8V2-QR units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-B8V2-QR, 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 BZX8450-B8V2-QR part is unused and in its original packaging.
Return procedure for BZX8450-B8V2-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-B8V2-QR Tags
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