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Nexperia USA Inc. BZX8450-C3V3VL
- Part No.:
- BZX8450-C3V3VL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-C3V3VL.pdf
- Description:
- DIODE ZENER 3.3V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:620
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Product details
Overview
BZX8450-C3V3VL from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, designed for precision biasing and voltage reference in portable electronics. It delivers 3.3 V nominal regulation at 50 µA test current, with ±5 % tolerance, 160 Ω differential resistance at 5 mA, and 1.5 µA max reverse current at VR = 3.0 V.
For engineers reviewing the BZX8450-C3V3VL datasheet, BZX8450-C3V3VL pinout, BZX8450-C3V3VL application, or BZX8450-C3V3VL equivalent, this device is selected for ultra-low-power voltage stabilization in battery-powered sensor nodes, microcontroller reset circuits, and analog front-end reference trimming where minimal leakage and stable low-current operation are critical.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified working voltage of 3.3 V (min 3.13 V, max 3.47 V) at IZ = 50 µA. Its temperature coefficient is −3.5 mV/K, ensuring predictable drift over temperature, and its diode capacitance is 160 pF at VR = 0 V, f = 1 MHz.
The device features intentional minor leakage optimization per AN90031 for fast switching and noise reduction. It supports continuous forward current up to 200 mA and non-repetitive peak reverse power dissipation of 40 W for tp = 100 µs, enabling robust transient handling in compact designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 3.3 V (3.13–3.47 V at IZ = 50 µA); enables precise low-voltage reference in 3.3 V system rails |
| Tolerance | ±5 % (C-series); ensures predictable regulation band for cost-sensitive consumer and industrial designs |
| Differential Resistance | 160 Ω max at IZ = 5 mA; defines output impedance and load regulation sensitivity |
| Reverse Current | 1.5 µA max at VR = 3.0 V; minimizes quiescent power loss in always-on circuits |
| Power Dissipation | 250 mW max at Tamb ≤ 25 °C on FR4 PCB; sets thermal derating boundary for SOT23 layout |
| Forward Voltage | 0.9 V max at IF = 10 mA; supports use as clamp or level shifter in bidirectional protection paths |
| Junction Temperature | −55 °C to +150 °C; qualifies for extended-temperature industrial and automotive-adjacent environments |
Pinout & Package
SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pitch), rated for reflow and wave soldering per IPC-7095 guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connects to lower-potential node in reverse-bias configuration; must be held at lower voltage than cathode for Zener operation |
| 2 | Not Connected (n.c.) | Internally unconnected terminal; must remain floating-no PCB trace or via allowed |
| 3 | Cathode (K) | Connects to higher-potential node; serves as regulated output reference point in shunt regulator topology |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA-enables stable regulation in µA-level bias networks without loading sensitive sources |
| Optimized leakage profile | Intentional minor IR rise (per AN90031) improves switching speed and reduces broadband noise in feedback paths |
| Thermal resistance | Rth(j-a) = 500 K/W (free air); informs minimum copper area needed for 250 mW derating on standard FR4 |
| Package compatibility | SOT23 footprint aligns with JEDEC TO-236AB; supports automated placement and high-density routing |
Applications
| Microcontroller Reset Circuit | Portable Sensor Biasing |
|---|---|
|
Use Scenario: Provides clean, low-drift reset threshold for ARM Cortex-M0+ MCUs operating from coin-cell batteries. IC Role / Device Role / Timing Role: Shunt Zener reference setting VDD monitor trip point in discrete reset generator circuit. Use Value: 1.5 µA max IR prevents premature battery drain; ±5 % tolerance ensures reliable reset assertion across temperature. |
Use Scenario: Supplies stable 3.3 V bias to MEMS accelerometer analog front-end in wearable health monitors. IC Role / Device Role / Timing Role: Low-current voltage reference for ADC reference divider and op-amp offset nulling. Use Value: 160 Ω rdiff maintains <0.5 % load regulation error under 10 µA sensor bias variation. |
| USB-C Power Negotiation Clamp | Industrial IO Module Protection |
|
Use Scenario: Clamps CC line voltage during USB PD communication to prevent overvoltage on Type-C controller GPIO. IC Role / Device Role / Timing Role: Fast-switching Zener clamp absorbing ESD transients and protocol overshoots. Use Value: Optimized leakage profile reduces signal distortion on 300 kbps bidirectional CC bus while surviving 40 W surge pulses. |
Use Scenario: Stabilizes 3.3 V auxiliary rail feeding isolated RS-485 transceiver bias in factory-floor PLC modules. IC Role / Device Role / Timing Role: Shunt regulator maintaining reference integrity amid 12 V supply ripple and EMI coupling. Use Value: −3.5 mV/K TC compensates for ambient drift across −40 °C to +85 °C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5226BS-7-F | 3.3 V ±5 %, 200 mW, rdiff = 17 Ω @ 20 mA-lower impedance but requires higher test current (20 mA) | Higher bias current demand limits use in sub-10 µA systems; better for active regulator feedback loops | Select when tighter dynamic regulation is needed and supply can support ≥20 mA Zener current |
| BZX84-C3V3,115 | Same 3.3 V ±5 % spec, but standard BZX84 series-no intentional leakage optimization or AN90031 tuning | Lacks fast-switching/noise-reduction behavior; exhibits higher capacitive noise in high-frequency feedback paths | Choose for legacy-compatible drop-in replacement where noise performance is non-critical |
Compared with MMBZ5226BS-7-F, BZX8450-C3V3VL trades lower dynamic impedance for ultra-low bias current and optimized noise; versus BZX84-C3V3, it adds controlled leakage for improved transient response in precision analog sensing.
Availability
BZX8450-C3V3VL is available at Aetrix Electronics and suitable for portable sensor biasing, microcontroller reset circuits, and industrial IO module protection requiring stable component supply with guaranteed long-term continuity.
Supply support for BZX8450-C3V3VL 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, headquartered in Nijmegen, Netherlands.
The BZX8450 series belongs to Nexperia's low-current Zener regulator portfolio, engineered specifically for battery-constrained and noise-sensitive applications where regulation stability at microampere bias currents is essential.
FAQ
What is the maximum reverse voltage before breakdown for BZX8450-C3V3VL?
The device is rated for nominal 3.3 V Zener voltage with min/max bounds of 3.13 V and 3.47 V at IZ = 50 µA. Breakdown begins within this band; operation above 3.47 V risks exceeding specified differential resistance and thermal limits. Absolute maximum reverse voltage is not defined-only the regulated working range applies.
Can BZX8450-C3V3VL be used in forward conduction mode?
Yes-it functions as a standard silicon diode with VF ≤ 0.9 V at IF = 10 mA. However, its primary design intent is reverse-bias Zener regulation; forward use is limited to clamping or level-shifting where its 200 mA IF rating and thermal resistance (Rth(j-a) = 500 K/W) are acceptable.
How does the "intentional minor rise of leakage current" affect circuit noise?
Per AN90031, the controlled increase in IR improves carrier sweep-out speed, reducing minority-carrier storage time and associated broadband switching noise. This yields cleaner regulation in high-gain analog feedback paths-measured as lower RMS noise floor in 10 Hz–100 kHz bandwidths compared to standard Zeners.
Is the n.c. pin (Pin 2) safe to connect to ground or leave floating on PCB?
Pin 2 is internally not connected and must remain electrically floating-no trace, pad, or via should contact it. Grounding or routing to any net may cause unpredictable leakage paths or parasitic coupling, violating the device's qualified SOT23 thermal and electrical performance.
BZX8450-C3V3VL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX8450
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3.3 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 7.5 µA @ 1.5 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-C3V3VL FAQ
1.How can I place an order for BZX8450-C3V3VL through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-C3V3VL 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-C3V3VL reliable?
The price and inventory of BZX8450-C3V3VL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-C3V3VL is usually 5 days.
3.What payment methods are accepted for BZX8450-C3V3VL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C3V3VL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-C3V3VL?
BZX8450-C3V3VL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-C3V3VL 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-C3V3VL?
For technical support, including BZX8450-C3V3VL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C3V3VL requirements.
6.How does Aetrix verify that BZX8450-C3V3VL is sourced from the original manufacturer or authorized distributors?
All BZX8450-C3V3VL 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-C3V3VL meets industry standards.
7.What is the process for return or replacement of BZX8450-C3V3VL?
All BZX8450-C3V3VL units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C3V3VL, 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-C3V3VL part is unused and in its original packaging.
Return procedure for BZX8450-C3V3VL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-C3V3VL Tags
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