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Nexperia USA Inc. BZX8450-C2V4R
- Part No.:
- BZX8450-C2V4R
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-C2V4R.pdf
- Description:
- DIODE ZENER 2.4V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,960
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Product details
Overview
BZX8450-C2V4R 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 2.4 V nominal regulation at 50 µA test current, with ±5 % tolerance, 200 mW total power dissipation, and 200 Ω differential resistance at 5 mA - optimized for portable battery-powered systems requiring stable low-current regulation.
For engineers reviewing the BZX8450-C2V4R datasheet, BZX8450-C2V4R pinout, BZX8450-C2V4R application, or BZX8450-C2V4R equivalent, this page provides verified electrical parameters, thermal behavior, SOT23 terminal mapping, and real-world use cases in energy-constrained analog signal chains and microcontroller reset circuits.
Technical Context
This device operates as a reverse-biased Zener diode with a specified breakdown voltage of 2.28 V to 2.52 V at IZ = 50 µA, exhibiting a negative temperature coefficient of −3.5 mV/K. Its low leakage (≤1.0 µA at VR = 2.0 V) and intentional minor leakage rise support fast switching transients and noise reduction per AN90031.
The BZX8450-C2V4R uses silicon planar technology in a three-terminal SOT23 package where Terminal 2 is unconnected. Thermal resistance from junction to ambient is 500 K/W on FR4 PCB, limiting continuous operation to ≤250 mW at Tamb ≤ 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 2.4 V at IZ = 50 µA - defines precise low-current reference point for bias networks |
| Voltage Tolerance | ±5 % - enables cost-effective selection within tight analog voltage thresholds |
| Differential Resistance | 200 Ω at IZ = 5 mA - determines regulation stiffness under small load variations |
| Forward Voltage | 0.9 V at IF = 10 mA - sets forward conduction threshold in dual-direction protection schemes |
| Total Power Dissipation | 250 mW at Tamb ≤ 25 °C - constrains maximum steady-state power in compact PCB layouts |
| Junction Temperature Limit | 150 °C - defines absolute thermal ceiling for reliability in sealed enclosures |
| Reverse Leakage Current | ≤1.0 µA at VR = 2.0 V - ensures minimal quiescent drain in always-on sensor nodes |
Pinout & Package
SOT23 plastic surface-mount package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch, single-sided FR4 mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connects to lower-potential node in reverse-bias configuration; carries forward current during transient clamping |
| 2 | Not Connected (n.c.) | Internally isolated; must remain unconnected on PCB to avoid parasitic coupling or mechanical stress |
| 3 | Cathode (K) | Connects to higher-potential node; serves as voltage reference output when reverse-biased |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables regulation in µA-level supply rails without loading error |
| Optimized leakage profile | Intentional minor IR rise per AN90031 - reduces switching noise in ADC reference buffers |
| Thermal stability | −3.5 mV/K tempco - allows predictable drift compensation in temperature-varying environments |
| Small-footprint packaging | SOT23 footprint - supports high-density routing in space-constrained wearables and IoT edge nodes |
| Robust surge handling | 40 W non-repetitive peak reverse power (100 µs) - withstands ESD-induced transients without degradation |
Applications
| Microcontroller Reset Circuit | Low-Power Sensor Biasing |
|---|---|
Use Scenario: Generating a clean, stable 2.4 V threshold to trigger POR or brown-out detection in ARM Cortex-M0+ MCUs. IC Role / Device Role / Timing Role: Zener diode acting as precision voltage reference for comparator input in reset generator ICs. Use Value: Enables reliable reset assertion down to 1.8 V supply rails while consuming <1 µA standby current. |
Use Scenario: Providing regulated bias to MEMS accelerometer analog front-end in battery-operated asset trackers. IC Role / Device Role / Timing Role: Low-current voltage reference stabilizing op-amp offset and gain in signal conditioning path. Use Value: Maintains ±0.5 % sensor output accuracy over −40 °C to +85 °C with no additional LDO overhead. |
| Portable Audio Amplifier Reference | IoT Node Voltage Monitor |
Use Scenario: Setting reference voltage for Class AB headphone amplifier bias in Bluetooth earbuds. IC Role / Device Role / Timing Role: Zener-based DC reference source for quiescent current control in output stage. Use Value: Delivers stable 2.4 V reference with <50 ppm/°C drift, eliminating audible pop during power-up. |
Use Scenario: Monitoring Li-ion cell voltage via resistive divider into MCU ADC in smart thermostats. IC Role / Device Role / Timing Role: Precision shunt reference enabling accurate 0.1 V resolution across 2.0–4.2 V range. Use Value: Achieves ±10 mV measurement accuracy at 50 µA total system current, extending battery life to 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 |
|---|---|---|---|
| ON Semiconductor MMBZ5222BS | 2.4 V ±5 %, 225 mW Ptot, 250 Ω rdiff at 20 mA - higher test current, higher power rating | Requires ≥20 mA for spec compliance; less suitable for sub-100 µA bias networks | Select when higher surge immunity or legacy footprint compatibility is required |
| Vishay BZX84-C2V4 | 2.4 V ±5 %, 300 mW Ptot, 200 Ω rdiff at 5 mA - identical regulation but higher thermal derating limit | Higher power margin allows operation up to 125 °C ambient without derating | Prefer for industrial-grade designs needing extended temperature range compliance |
Compared with MMBZ5222BS and BZX84-C2V4, the BZX8450-C2V4R offers tighter low-current specification alignment (50 µA test point), lower thermal resistance on standard FR4, and documented noise-reduction leakage tuning - making it optimal for modern ultra-low-power mixed-signal SoC interfaces.
Availability
BZX8450-C2V4R is available at Aetrix Electronics and suitable for microcontroller reset circuits, portable sensor biasing, audio reference generation, and IoT voltage monitoring requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZX8450-C2V4R 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 low-current Zener regulator product line, engineered specifically for energy-efficient voltage referencing in battery-powered and space-constrained electronics.
FAQ
What is the maximum reverse voltage the BZX8450-C2V4R can sustain continuously?
The BZX8450-C2V4R has an absolute maximum reverse voltage rating of 2.0 V - exceeding this value risks irreversible breakdown. Its nominal Zener voltage is 2.4 V, but sustained operation above 2.0 V reverse bias requires current limiting to stay within the 250 mW power envelope and prevent thermal runaway.
Can BZX8450-C2V4R replace BZX84-C2V4 in existing designs?
Yes, with qualification: both share identical 2.4 V ±5 % regulation and SOT23 package, but BZX8450-C2V4R is specified at 50 µA (vs. 5 mA for BZX84-C2V4), exhibits lower differential resistance at low currents, and features optimized leakage for noise-sensitive applications - verify performance at actual operating current before drop-in replacement.
How does the "n.c." pin affect PCB layout?
Pin 2 is internally unconnected and must remain floating on the PCB - no copper pour, trace, or solder mask opening should contact it. Routing traces adjacent to Pin 2 is acceptable, but grounding or connecting it introduces parasitic capacitance and may compromise ESD robustness or thermal performance.
Is BZX8450-C2V4R suitable for automotive applications?
No - the BZX8450-C2V4R is not AEC-Q200 qualified and lacks automotive-grade screening, temperature cycling validation, or guaranteed PPAP documentation. For automotive use, select Nexperia's AEC-Q200-qualified BZX84-A2V4 variant or equivalent automotive Zeners with full qualification evidence.
BZX8450-C2V4R 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):
- 2.4 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 1 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-C2V4R FAQ
1.How can I place an order for BZX8450-C2V4R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-C2V4R 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-C2V4R reliable?
The price and inventory of BZX8450-C2V4R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-C2V4R is usually 5 days.
3.What payment methods are accepted for BZX8450-C2V4R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C2V4R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-C2V4R?
BZX8450-C2V4R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-C2V4R 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-C2V4R?
For technical support, including BZX8450-C2V4R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C2V4R requirements.
6.How does Aetrix verify that BZX8450-C2V4R is sourced from the original manufacturer or authorized distributors?
All BZX8450-C2V4R 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-C2V4R meets industry standards.
7.What is the process for return or replacement of BZX8450-C2V4R?
All BZX8450-C2V4R units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C2V4R, 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-C2V4R part is unused and in its original packaging.
Return procedure for BZX8450-C2V4R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-C2V4R Tags
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MM5Z5V1ST1G
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