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Nexperia USA Inc. BZX8450-C8V2R
- Part No.:
- BZX8450-C8V2R
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-C8V2R.pdf
- Description:
- DIODE ZENER 8.2V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,580
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Product details
Overview
BZX8450-C8V2R from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, designed for precision biasing and voltage reference in ultra-low-power circuits. 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 portable battery-powered sensors and microcontroller reset circuits.
For engineers reviewing the BZX8450-C8V2R datasheet, BZX8450-C8V2R pinout, BZX8450-C8V2R application, or BZX8450-C8V2R equivalent, key selection criteria include low-test-current regulation accuracy, SOT23 footprint compatibility, thermal resistance (330 K/W to solder point), and intentional leakage optimization for noise-sensitive analog front-ends.
Technical Context
This Zener diode operates in reverse breakdown mode with specified regulation at IZ = 50 µA - making it suitable for micropower bias networks where quiescent current must remain below 100 µA. Its VZ = 7.79 V (min) to 8.61 V (max) range ensures predictable clamping under varying ambient temperatures.
The device features intentionally elevated reverse leakage in the C-series (vs. B-series), per AN90031, to improve switching speed and reduce high-frequency noise in feedback paths. Thermal resistance from junction to solder point is 330 K/W, supporting reliable operation on standard FR4 PCBs with single-sided 70 µm copper.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 8.2 V - precise reference for 3.3 V/5 V system monitoring and LDO feedback |
| Zener Tolerance | ±5 % - supports cost-sensitive designs where tight regulation is secondary to low power |
| Test Current | 50 µA - enables regulation in standby modes of IoT nodes and wearables |
| Differential Resistance | 80 Ω at IZ = 5 mA - limits output impedance in shunt regulator configurations |
| Forward Voltage | ≤ 0.9 V at IF = 10 mA - ensures minimal drop when used as clamp in forward direction |
| Power Dissipation | 250 mW at Tamb ≤ 25 °C - defines maximum continuous DC power in standard PCB layout |
| Junction Temperature | 150 °C max - sets upper thermal limit for reliability in enclosed industrial enclosures |
Pinout & Package
SOT23 plastic surface-mount package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm lead pitch, 3-terminal configuration with cathode tab thermal path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connected to lower-potential node; reverse-biased during regulation |
| 2 | Not Connected (n.c.) | No internal connection; electrically isolated; must not be tied to any net |
| 3 | Cathode (K) | Connected to higher-potential node; primary thermal path to PCB via solder point |
Key Features
| Feature | Design Value |
|---|---|
| Low-test-current regulation | Specified at 50 µA - eliminates need for bias resistors >100 kΩ in battery-critical applications |
| Optimized leakage profile | Intentional minor IR rise per AN90031 - reduces switching transients in ADC reference buffers |
| Thermal performance | Rth(j-sp) = 330 K/W - enables direct thermal coupling to ground plane without heatsink |
| Robust surge rating | 40 W non-repetitive peak power (100 µs pulse) - withstands ESD-induced transients on supply rails |
| Stable tempco | +3.2 mV/K - predictable drift over −55 °C to +150 °C for automotive under-hood sensor references |
Applications
| Microcontroller Reset Circuit | Portable Sensor Bias Network |
|---|---|
|
Use Scenario: Generating clean 8.2 V reference for external reset supervisor IC in BLE-enabled wearable. IC Role / Device Role / Timing Role: Zener shunt regulator providing stable threshold voltage to enable reset assertion below 7.8 V. Use Value: 50 µA test current allows direct connection to coin-cell anode without loading; ±5 % tolerance accommodates wide battery discharge curve. |
Use Scenario: Biasing photodiode amplifier in handheld environmental CO₂ monitor powered by 9 V alkaline. IC Role / Device Role / Timing Role: Precision voltage reference for op-amp offset nulling and gain-setting network. Use Value: 80 Ω dynamic impedance minimizes reference error under varying photocurrent load; low capacitance (150 pF) preserves signal bandwidth. |
| USB-C Power Negotiation Clamp | Industrial PLC Input Protection |
|
Use Scenario: Clamping CC line voltage during USB PD communication handshake in embedded host controller. IC Role / Device Role / Timing Role: Fast-response Zener clamp limiting CC pin to 8.2 V during fault conditions. Use Value: Optimized leakage improves noise immunity on 300 kHz PD signaling; SOT23 footprint fits dense Type-C connector layout. |
Use Scenario: Overvoltage protection for 24 V digital input channel in DIN-rail mounted programmable logic controller. IC Role / Device Role / Timing Role: Shunt regulator absorbing transient surges while maintaining logic-level compatibility. Use Value: 40 W non-repetitive surge rating handles IEC 61000-4-5 Level 3 surges; 150 °C junction rating supports unventilated cabinet operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5231BS | 8.2 V ±5 %, but rated at IZ = 20 mA; rdiff = 30 Ω; no intentional leakage optimization | Higher bias current required; less suitable for sub-100 µA systems | Prefer when higher regulation accuracy at moderate current is needed and board space permits larger SOT-23 variant |
| Vishay BZX84-C8V2 | Identical 8.2 V ±5 % spec, same SOT23 package, but rdiff = 90 Ω at 5 mA and no AN90031 leakage tuning | Slightly higher dynamic impedance; no documented fast-switching enhancement | Acceptable for general-purpose clamping where noise reduction is not critical |
Compared with MMBZ5231BS and BZX84-C8V2, the BZX8450-C8V2R offers superior micropower operation (50 µA test point), lower thermal resistance to solder point (330 K/W), and application-specific leakage behavior for noise-sensitive analog functions - making it optimal for battery-constrained and high-fidelity signal chain designs.
Availability
BZX8450-C8V2R is available at Aetrix Electronics and suitable for portable medical sensors, industrial IO modules, and USB-C peripheral designs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZX8450-C8V2R 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 and industrial-grade components.
The BZX8450 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for energy-efficient voltage referencing in battery-operated and thermally constrained systems.
FAQ
What is the maximum continuous power dissipation for BZX8450-C8V2R at 70 °C ambient?
At Tamb = 70 °C, derated power is 150 mW. This is calculated using Ptot = 250 mW − [(70 − 25) × (250 mW / 500 K/W)] = 150 mW, based on Rth(j-a) = 500 K/W and Tj(max) = 150 °C. Operation above this requires thermal simulation or PCB copper area increase.
Can BZX8450-C8V2R replace BZX84-C8V2 in existing designs?
Yes, with verification of leakage sensitivity. Both share identical 8.2 V ±5 % rating, SOT23 package, and pinout. However, BZX8450-C8V2R exhibits intentionally higher reverse leakage per AN90031 - beneficial for noise reduction but potentially problematic in ultra-low-leakage sample-and-hold circuits.
Is Pin 2 truly unconnected, or does it serve a mechanical function?
Pin 2 is electrically unconnected (n.c.) with no internal bond wire or die connection. It serves only as a mechanical alignment aid during SMT placement and must remain floating - tying it to ground or VCC introduces parasitic coupling and violates Nexperia's layout guidelines.
What is the typical reverse recovery time for BZX8450-C8V2R?
Reverse recovery time is not characterized or guaranteed for this Zener diode, as it is not designed for switching operation. Its optimized leakage profile targets noise reduction in regulation, not fast turn-off. For <100 ns recovery, a dedicated TVS or Schottky clamp is recommended instead.
BZX8450-C8V2R 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):
- 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:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BZX8450-C8V2R FAQ
1.How can I place an order for BZX8450-C8V2R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-C8V2R 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-C8V2R reliable?
The price and inventory of BZX8450-C8V2R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-C8V2R is usually 5 days.
3.What payment methods are accepted for BZX8450-C8V2R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C8V2R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-C8V2R?
BZX8450-C8V2R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-C8V2R 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-C8V2R?
For technical support, including BZX8450-C8V2R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C8V2R requirements.
6.How does Aetrix verify that BZX8450-C8V2R is sourced from the original manufacturer or authorized distributors?
All BZX8450-C8V2R 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-C8V2R meets industry standards.
7.What is the process for return or replacement of BZX8450-C8V2R?
All BZX8450-C8V2R units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C8V2R, 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-C8V2R part is unused and in its original packaging.
Return procedure for BZX8450-C8V2R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-C8V2R Tags
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