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Nexperia USA Inc. BZX8450-C8V2-QR
- Part No.:
- BZX8450-C8V2-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-C8V2-QR.pdf
- Description:
- DIODE ZENER 8.2V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:29,998
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Product details
Overview
BZX8450-C8V2-QR from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, designed for precision voltage reference and biasing in automotive and portable electronics. It delivers 8.2 V nominal regulation at 50 µA test current, with ±5 % tolerance, 80 Ω differential resistance at 5 mA, and 3.2 mV/K temperature coefficient - enabling stable operation in battery-powered sensor interfaces and ECU power-rail monitoring.
For engineers reviewing the BZX8450-C8V2-QR datasheet, BZX8450-C8V2-QR pinout, BZX8450-C8V2-QR application, or BZX8450-C8V2-QR equivalent, this page provides verified electrical characteristics, AEC-Q101 qualification status, thermal resistance data (Rth(j-a) = 500 K/W), and automotive-grade leakage behavior per AN90031.
Technical Context
This Zener diode operates in reverse breakdown mode with specified regulation at low test current (50 µA), making it suitable for ultra-low-power bias networks where quiescent current must remain below 100 µA. Its intentional minor rise in leakage current (per AN90031) reduces switching noise in signal conditioning paths without compromising DC accuracy.
The device features a 150 °C maximum junction temperature, 250 mW total power dissipation on FR4 PCB, and 0.9 V forward voltage at 10 mA - supporting dual-role use as both voltage reference and ESD clamp in I/O protection circuits across automotive body control modules and infotainment subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 8.2 V at IZ = 50 µA - defines precise DC reference point for analog sensor excitation or ADC reference scaling |
| Tolerance | ±5 % - ensures predictable voltage margin in automotive ambient temperature range (−40 °C to +125 °C) |
| Differential Resistance | 80 Ω at IZ = 5 mA - limits output impedance drift under load variation in feedback loops |
| Temperature Coefficient | +3.2 mV/K - enables predictable VZ drift compensation in thermally coupled circuits |
| Reverse Current | ≤ 0.1 µA at VR = 6.9 V - guarantees minimal standby power loss in always-on vehicle modules |
| Forward Voltage | 0.9 V at IF = 10 mA - supports bidirectional clamping function in transient protection designs |
| Power Dissipation | 250 mW at Tamb ≤ 25 °C - sets maximum continuous DC bias capability on standard FR4 PCB |
Pinout & Package
Package: SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm lead pitch), qualified per AEC-Q101 for automotive use.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connected to lower-potential node in reverse-bias configuration; serves as return path for Zener current |
| 2 | Not Connected (n.c.) | Internally unconnected terminal - must remain floating; no PCB trace or solder mask required |
| 3 | Cathode (K) | Connected to higher-potential node; carries regulated Zener current and defines reference voltage node |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood and cabin applications including engine control units and ADAS sensors |
| Low test current specification | Regulation defined at 50 µA - enables use in microamp-level bias networks of IoT edge nodes and wearables |
| Optimized leakage profile | Intentional minor IR increase per AN90031 - reduces high-frequency noise in precision analog front-ends |
| Thermal resistance | Rth(j-a) = 500 K/W - allows direct thermal modeling for derating in sealed automotive enclosures |
| Capacitance | 150 pF at VR = 0 V, f = 1 MHz - supports RF decoupling roles in CAN transceiver supply rails |
Applications
| Automotive Body Control Module | Portable Medical Sensor Node |
|---|---|
Use Scenario: Voltage reference for LIN bus transceiver biasing and internal LDO feedback divider. IC Role / Device Role / Timing Role: Zener reference providing stable 8.2 V node for current-source generation and threshold detection. Use Value: Enables <1 µA quiescent current in sleep mode while maintaining ±2 % reference accuracy over −40 °C to +105 °C. |
Use Scenario: Precision excitation source for resistive biosensor bridges in wearable glucose monitors. IC Role / Device Role / Timing Role: Low-drift voltage reference supplying bridge bias current via series resistor. Use Value: Delivers <±0.5 % VZ shift across 0–40 °C operating range, reducing calibration frequency by 3× versus ±5 % alternatives. |
| Industrial PLC Analog Input Card | Smart Home Smoke Detector MCU Bias |
Use Scenario: Reference for 16-bit SAR ADC input scaling in 4–20 mA loop receiver circuitry. IC Role / Device Role / Timing Role: Stable 8.2 V reference feeding precision resistor ladder network. Use Value: Maintains <1 LSB error contribution at full-scale due to 80 Ω rdiff limiting dynamic loading effects. |
Use Scenario: Low-power MCU core voltage supervisor and brown-out detection reference. IC Role / Device Role / Timing Role: Zener-based comparator threshold generator tied to battery voltage monitoring path. Use Value: Supports 10-year shelf life with <0.1 µA leakage at 6.9 V, extending coin-cell lifetime beyond 5 years. |
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-C8V2,115 | ±5 % tolerance, same 8.2 V nominal, but not AEC-Q101 qualified; 100 Ω rdiff at 5 mA | Limited to industrial/commercial grade systems without automotive qualification requirements | Select when cost sensitivity outweighs automotive reliability validation needs |
| MMSZ5236B-TP | ±5 % tolerance, 8.2 V nominal, SOD-123 package; 100 Ω rdiff; Rth(j-a) = 625 K/W | Higher thermal resistance limits power handling in compact PCB layouts; no AN90031 leakage optimization | Prefer only if SOD-123 footprint compatibility is mandatory and thermal margin > 20 K/W is available |
Compared with BZX8450-C8V2-QR, the BZX84-C8V2,115 lacks automotive qualification and exhibits higher dynamic impedance, while MMSZ5236B-TP trades off thermal performance and noise-optimized leakage for alternate packaging - making the BZX8450-C8V2-QR uniquely suited for space-constrained, low-noise automotive sensor references.
Availability
BZX8450-C8V2-QR is available at Aetrix Electronics and suitable for automotive ECU design, portable medical instrumentation, industrial analog input modules, and smart home safety devices requiring stable component supply with guaranteed long-term continuity.
Supply support for BZX8450-C8V2-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 high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and energy-efficient solutions.
The BZX8450-Q series belongs to Nexperia's automotive-grade Zener regulator portfolio, engineered specifically for low-current, low-noise voltage reference applications in harsh-environment electronic control units and battery-operated sensing systems.
FAQ
What is the maximum reverse voltage before breakdown for BZX8450-C8V2-QR?
The nominal Zener voltage is 8.2 V with ±5 % tolerance, meaning breakdown occurs between 7.79 V and 8.61 V at IZ = 50 µA. The absolute maximum non-repetitive peak reverse voltage is not specified; however, the device is rated for continuous operation up to its specified VZ range under recommended conditions.
Does BZX8450-C8V2-QR support bidirectional ESD protection?
No - it is a unidirectional Zener diode configured for reverse-bias regulation only. Pin 2 is not connected, and forward conduction (anode-to-cathode) is limited to 0.9 V at 10 mA; it lacks symmetric clamping capability required for IEC 61000-4-2 ESD protection.
How does the "intentional minor rise of leakage current" affect circuit performance?
Per AN90031, this controlled leakage increase reduces high-frequency noise in analog signal paths by damping parasitic oscillations, particularly in op-amp feedback networks - without degrading DC regulation accuracy or increasing static power consumption beyond 0.1 µA at 6.9 V.
Can BZX8450-C8V2-QR be used in parallel for higher power handling?
No - Zener diodes exhibit manufacturing spread in VZ and rdiff, causing current imbalance. Parallel connection risks thermal runaway; the device is rated for 250 mW max dissipation on FR4 PCB and must be used singly per regulation node.
BZX8450-C8V2-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:
- ±5%
- 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:
- -55°C ~ 150°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BZX8450-C8V2-QR FAQ
1.How can I place an order for BZX8450-C8V2-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-C8V2-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-C8V2-QR reliable?
The price and inventory of BZX8450-C8V2-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-C8V2-QR is usually 5 days.
3.What payment methods are accepted for BZX8450-C8V2-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C8V2-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-C8V2-QR?
BZX8450-C8V2-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-C8V2-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-C8V2-QR?
For technical support, including BZX8450-C8V2-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C8V2-QR requirements.
6.How does Aetrix verify that BZX8450-C8V2-QR is sourced from the original manufacturer or authorized distributors?
All BZX8450-C8V2-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-C8V2-QR meets industry standards.
7.What is the process for return or replacement of BZX8450-C8V2-QR?
All BZX8450-C8V2-QR units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C8V2-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-C8V2-QR part is unused and in its original packaging.
Return procedure for BZX8450-C8V2-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-C8V2-QR Tags
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MMBZ5240B-7-F
Diodes Incorporated
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SMAJ4744A-TP
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SMAZ12-13-F
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