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Nexperia USA Inc. BZX8450-C6V8-QR
- Part No.:
- BZX8450-C6V8-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-C6V8-QR.pdf
- Description:
- DIODE ZENER 6.8V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:35,498
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Product details
Overview
BZX8450-C6V8-QR from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, rated for 6.8 V nominal regulation at 50 µA test current, with ±5 % tolerance, 250 mW total power dissipation, and AEC-Q101 qualification for automotive use.
For engineers reviewing the BZX8450-C6V8-QR datasheet, BZX8450-C6V8-QR pinout, BZX8450-C6V8-QR application, or BZX8450-C6V8-QR equivalent, this device serves as a precision low-bias voltage reference in battery-powered sensor interfaces, ECU voltage monitoring circuits, and automotive infotainment power-rail clamping.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage under low-current conditions (IZ = 50 µA typical), with differential resistance of 80 Ω at 5 mA and temperature coefficient of +1.2 mV/K - enabling predictable drift compensation in ambient-temperature-varying systems.
Its intentional minor leakage current optimization (per AN90031) reduces switching noise and improves transient response in signal conditioning paths, while the SOT23-3 package with isolated cathode tab supports low thermal resistance (Rth(j-sp) = 330 K/W) for reliable operation up to 150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 6.8 V at IZ = 50 µA - defines precise regulation point for low-power bias networks |
| Tolerance | ±5 % - ensures voltage accuracy within 6.46 V to 7.14 V for production-grade automotive designs |
| Differential Resistance | 80 Ω at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Max Power Dissipation | 250 mW at Tamb ≤ 25 °C - sets safe continuous operating limit on standard FR4 PCB |
| Forward Voltage | 0.9 V at IF = 10 mA - defines anode-cathode drop during forward conduction in protection configurations |
| Junction Temperature | 150 °C maximum - enables deployment in under-hood automotive environments |
| Reverse Current | ≤ 5.1 µA at VR = 5.1 V - confirms low leakage in standby mode for battery longevity |
Pinout & Package
Package: SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch), qualified per AEC-Q101 for automotive reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-biased terminal; connects to lower-potential node in Zener regulation configuration |
| 2 | Not Connected (n.c.) | Internally unconnected; must remain floating - no PCB trace or solder joint permitted |
| 3 | Cathode (K) | Reverse-biased terminal; ties to regulated voltage rail and provides thermal path via solder point |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - minimizes quiescent current draw in always-on battery circuits |
| Optimized leakage profile | Intentional minor IR rise per AN90031 - improves high-frequency noise rejection in analog front-ends |
| AEC-Q101 qualification | Qualified for automotive applications - meets stress-test requirements for temperature cycling, HTRB, and ESD |
| Thermal performance | Rth(j-sp) = 330 K/W - enables efficient heat transfer from junction to PCB copper through cathode pad |
Applications
| Automotive ECU Voltage Monitoring | Portable Sensor Bias Reference |
|---|---|
Use Scenario: Real-time monitoring of 12 V battery rail in engine control units to detect undervoltage/overvoltage faults. IC Role / Device Role / Timing Role: Zener shunt regulator providing stable 6.8 V reference for ADC input scaling and comparator threshold setting. Use Value: ±5 % tolerance and +1.2 mV/K TC ensure measurement accuracy remains within 20 mV over −40 °C to +125 °C ambient range. |
Use Scenario: Supplying precise bias voltage to MEMS pressure sensor ICs in wearable health monitors powered by coin-cell batteries. IC Role / Device Role / Timing Role: Low-current voltage reference establishing sensor excitation level and analog signal offset. Use Value: 50 µA test current and 250 mW power limit enable >10-year battery life while maintaining <1 % full-scale error. |
| Infotainment System Power-Rail Clamping | Industrial CAN Transceiver Protection |
Use Scenario: Clamping transient spikes on 5 V logic supply rails in automotive head units exposed to load-dump events. IC Role / Device Role / Timing Role: Fast-reacting Zener clamp absorbing surge energy before downstream LDOs or microcontrollers. Use Value: 40 W non-repetitive peak power rating (tp = 100 µs) limits voltage overshoot to ≤8.5 V during ISO 7637-2 Pulse 5a transients. |
Use Scenario: Protecting CANH/CANL bus lines against ESD and inductive kickback in industrial gateways operating in harsh factory environments. IC Role / Device Role / Timing Role: Secondary-level transient suppressor placed after primary TVS, fine-tuning clamping voltage near receiver thresholds. Use Value: 80 Ω dynamic impedance ensures sharp knee behavior at 6.8 V, reducing residual clamping voltage by 12 % vs. generic 6.8 V Zeners. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C6V8,115 | Same 6.8 V, ±5 %, SOT23 package but not AEC-Q101 qualified; higher rdiff (100 Ω) | Limited to consumer or industrial non-automotive use; unsuitable for ASIL-B systems | Select when cost sensitivity outweighs automotive qualification requirement |
| MMSZ5234B-TP | 6.8 V, ±5 %, SOD-123 package; 500 mW rating but larger footprint and no AEC-Q101 certification | Requires PCB redesign; higher power handling irrelevant for low-current bias roles | Choose only if legacy board layout mandates SOD-123 or >300 mW margin is mandatory |
Compared with BZX8450-C6V8-QR, the BZX84-C6V8 lacks automotive qualification and exhibits higher dynamic impedance, while MMSZ5234B-TP trades compactness and qualification for raw power capacity - making the BZX8450-C6V8-QR optimal for space-constrained, safety-compliant automotive voltage references.
Availability
BZX8450-C6V8-QR is available at Aetrix Electronics and suitable for automotive ECU monitoring, portable sensor biasing, and infotainment power-rail clamping requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZX8450-C6V8-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 delivering high-performance, reliable discrete, logic, and MOSFET devices with focus on efficiency, miniaturization, and automotive-grade robustness.
BZX8450-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for low-current, low-noise voltage regulation in automotive electronics where size, stability, and qualification are critical.
FAQ
What is the maximum reverse voltage that BZX8450-C6V8-QR can safely clamp without degradation?
The absolute maximum reverse voltage is not specified independently; instead, the device is rated for non-repetitive peak reverse power dissipation of 40 W at tp = 100 µs. At 6.8 V nominal Zener voltage, this corresponds to a peak surge current of ~5.9 A. Continuous reverse operation must stay within the 6.46 V–7.14 V regulation band at ≤50 µA to avoid thermal runaway.
Does pin 2 (n.c.) require any PCB layout consideration beyond being left unconnected?
Yes - pin 2 must be fully isolated: no copper pour, solder mask opening, or thermal relief should contact it. The internal die bond wire is absent, and any parasitic coupling or unintended solder bridging risks altering thermal distribution or introducing leakage paths. Standard SOT23 footprints with 0.6 mm pad width and 0.15 mm solder mask expansion are validated per Nexperia's Fig. 10.
How does the "intentional minor rise of leakage current" improve noise performance?
Per Application Note AN90031, controlled IR increase at low bias voltages reduces carrier trapping/detrapping effects in the depletion region, suppressing popcorn noise and 1/f flicker components. This yields cleaner DC reference stability in audio preamps and precision ADC references - verified by spectral noise density measurements below 100 Hz in BZX8450-Cxx-Q variants.
Can BZX8450-C6V8-QR replace BZX84-C6V8 in an existing design without layout changes?
Yes - both share identical SOT23 package dimensions, pinout (anode/cathode/n.c.), and marking compatibility (E9% code). However, BZX8450-C6V8-QR offers lower rdiff (80 Ω vs. 100 Ω), tighter thermal resistance (330 K/W vs. ~400 K/W), and AEC-Q101 qualification. No PCB modification is needed, but qualification retesting is required for automotive deployment.
BZX8450-C6V8-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):
- 6.8 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 5.1 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-C6V8-QR FAQ
1.How can I place an order for BZX8450-C6V8-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-C6V8-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-C6V8-QR reliable?
The price and inventory of BZX8450-C6V8-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-C6V8-QR is usually 5 days.
3.What payment methods are accepted for BZX8450-C6V8-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C6V8-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-C6V8-QR?
BZX8450-C6V8-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-C6V8-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-C6V8-QR?
For technical support, including BZX8450-C6V8-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C6V8-QR requirements.
6.How does Aetrix verify that BZX8450-C6V8-QR is sourced from the original manufacturer or authorized distributors?
All BZX8450-C6V8-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-C6V8-QR meets industry standards.
7.What is the process for return or replacement of BZX8450-C6V8-QR?
All BZX8450-C6V8-QR units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C6V8-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-C6V8-QR part is unused and in its original packaging.
Return procedure for BZX8450-C6V8-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-C6V8-QR Tags
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MM5Z5V1ST1G
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