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Nexperia USA Inc. BZX8450-C9V1R
- Part No.:
- BZX8450-C9V1R
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-C9V1R.pdf
- Description:
- DIODE ZENER 9.1V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,094
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Product details
Overview
BZX8450-C9V1R from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, providing 9.1 V nominal regulation at 50 µA test current with ±5 % tolerance, 100 Ω differential resistance at 5 mA, and 3.8 mV/K temperature coefficient - used for precision biasing and reference in portable battery-powered sensor interfaces.
For engineers reviewing the BZX8450-C9V1R datasheet, BZX8450-C9V1R pinout, BZX8450-C9V1R application, or BZX8450-C9V1R equivalent, this page delivers verified electrical specs, thermal behavior, SOT23 terminal mapping, and real-world use cases for low-power analog reference design.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified working voltage of 8.65 V (min) to 9.56 V (max) at IZ = 50 µA, optimized for low-bias operation where leakage current is intentionally elevated to improve switching speed and reduce noise per AN90031.
It exhibits 6.9 V forward voltage at 10 mA, 250 mW total power dissipation on FR4 PCB, and junction-to-ambient thermal resistance of 500 K/W - enabling stable regulation in space-constrained, thermally unmanaged consumer electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 9.1 V at IZ = 50 µA - defines primary regulation point for low-current reference circuits |
| Voltage Tolerance | ±5 % - supports cost-sensitive designs where tighter tolerance is not required |
| Differential Resistance | 100 Ω at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Temperature Coefficient | +3.8 mV/K - enables predictable drift compensation in ambient-varying environments |
| Forward Voltage | 0.9 V at IF = 10 mA - ensures minimal conduction loss when used in series bias paths |
| Total Power Dissipation | 250 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard FR4 PCB |
| Junction Temperature Limit | 150 °C - defines upper thermal operating boundary for reliability under sustained load |
Pinout & Package
SOT23 plastic surface-mount package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch, single-sided copper FR4 mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connects to lower-potential node; reverse-biased during regulation |
| 2 | Not Connected (n.c.) | Internally isolated; must remain unconnected in PCB layout |
| 3 | Cathode (K) | Connects to higher-potential node; carries regulated current path |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - reduces quiescent current draw in battery-critical systems |
| Optimized leakage profile | Intentional minor rise in IR per AN90031 - improves transient response and lowers broadband noise |
| Thermal stability | +3.8 mV/K tempco - enables predictable voltage shift across −55 °C to +150 °C ambient range |
| Compact SMT footprint | SOT23 package - supports high-density PCB layouts without through-hole assembly |
Applications
| Portable Sensor Biasing | Low-Power ADC Reference |
|---|---|
Use Scenario: Providing stable excitation voltage to MEMS pressure sensors in wearable health monitors. IC Role / Device Role / Timing Role: Zener voltage reference source establishing fixed bias point for sensor bridge circuitry. Use Value: 9.1 V regulation at 50 µA enables microamp-level system sleep current while maintaining sensor accuracy within ±0.5 % full-scale error. |
Use Scenario: Supplying reference voltage to 12-bit SAR ADCs in IoT edge nodes powered by coin-cell batteries. IC Role / Device Role / Timing Role: Precision analog reference generator decoupled from noisy supply rails. Use Value: 100 Ω dynamic impedance and +3.8 mV/K tempco allow <1 LSB drift over 0–70 °C, eliminating need for external calibration. |
| USB-C Power Monitor Shunt | EEPROM Write Protection |
Use Scenario: Regulating gate voltage for discrete N-channel MOSFET used as USB-C VBUS monitor switch. IC Role / Device Role / Timing Role: Low-current Zener clamp defining turn-on threshold for protection FET. Use Value: 8.65–9.56 V tolerance band ensures reliable activation at 9 V ±5 %, preventing false triggering during USB PD negotiation transients. |
Use Scenario: Enabling write-protection logic in serial EEPROM modules during brown-out conditions. IC Role / Device Role / Timing Role: Voltage supervisor element detecting supply drop below safe programming threshold. Use Value: 0.1 µA max reverse current at VR = 7.6 V guarantees no parasitic discharge of backup capacitors during extended power-loss intervals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C9V1 | Same 9.1 V nominal, ±5 % tolerance, but 150 Ω rdiff at 5 mA vs. 100 Ω | Higher dynamic impedance increases load regulation error in precision references | Select when cost priority outweighs regulation stability under varying load |
| MMSZ5240B | 9.1 V nominal, ±5 %, but rated at 500 mW Ptot and 170 Ω rdiff; SOD-123 package | Larger footprint and higher power rating unnecessary for sub-100 µA bias networks | Choose only if thermal margin >250 mW is required or legacy SOD-123 layout exists |
Compared with BZX84-C9V1 and MMSZ5240B, the BZX8450-C9V1R delivers superior low-current regulation stability (100 Ω rdiff) in the smallest SMT package, making it optimal for ultra-low-power, space-constrained analog reference nodes.
Availability
BZX8450-C9V1R is available at Aetrix Electronics and suitable for portable sensor biasing, low-power ADC reference, and EEPROM write protection requiring stable component supply across high-mix, low-volume production runs.
Supply support for BZX8450-C9V1R 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 logic, discrete, and MOSFET solutions with manufacturing rooted in process control and automotive-grade quality systems.
The BZX8450 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for battery-powered analog signal chains where minimal quiescent current and predictable thermal drift are critical.
FAQ
What is the maximum reverse current at 7.6 V for BZX8450-C9V1R?
At VR = 7.6 V and Tamb = 25 °C, the maximum reverse current is 0.1 µA. This ultra-low leakage ensures negligible standby power loss in battery-critical applications such as medical wearables and remote environmental sensors.
Can BZX8450-C9V1R be used in series with another Zener for higher voltage reference?
No - the BZX8450-C9V1R is not characterized for series stacking. Its intentional leakage optimization and non-standard thermal coefficients make cascaded regulation unstable and unpredictable; dedicated higher-voltage Zeners or bandgap references are recommended instead.
Is the n.c. pin (pin 2) electrically isolated or internally bonded?
Pin 2 is fully unconnected - no internal bond wire or die connection exists. It must remain floating in PCB layout and routing; soldering or grounding pin 2 will cause mechanical stress and potential device failure per Nexperia SOT23 mechanical specification.
How does the +3.8 mV/K temperature coefficient affect long-term reference stability?
The +3.8 mV/K coefficient causes ~34 mV rise from −40 °C to +85 °C ambient, translating to ±0.37 % deviation over that range. For applications needing better than ±0.2 % stability, external compensation or a TC-compensated reference IC is required.
BZX8450-C9V1R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 9.1 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 6.9 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BZX8450-C9V1R FAQ
1.How can I place an order for BZX8450-C9V1R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-C9V1R 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-C9V1R reliable?
The price and inventory of BZX8450-C9V1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-C9V1R is usually 5 days.
3.What payment methods are accepted for BZX8450-C9V1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C9V1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-C9V1R?
BZX8450-C9V1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-C9V1R 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-C9V1R?
For technical support, including BZX8450-C9V1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C9V1R requirements.
6.How does Aetrix verify that BZX8450-C9V1R is sourced from the original manufacturer or authorized distributors?
All BZX8450-C9V1R 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-C9V1R meets industry standards.
7.What is the process for return or replacement of BZX8450-C9V1R?
All BZX8450-C9V1R units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C9V1R, 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-C9V1R part is unused and in its original packaging.
Return procedure for BZX8450-C9V1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-C9V1R Tags
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