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Nexperia USA Inc. BZX8450-B2V4R
- Part No.:
- BZX8450-B2V4R
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-B2V4R.pdf
- Description:
- DIODE ZENER 2.4V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,072
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Product details
Overview
BZX8450-B2V4R 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 a nominal 2.4 V regulation at 50 μA test current, with ±2 % tolerance, 200 mA peak forward current, and 250 mW total power dissipation - ideal for battery-powered sensor nodes and portable IoT edge devices.
For engineers reviewing the BZX8450-B2V4R datasheet, BZX8450-B2V4R pinout, BZX8450-B2V4R application, or BZX8450-B2V4R equivalent, key selection criteria include its low 50 μA regulation current, 2.4 V nominal Zener voltage with tight ±2 % tolerance, SOT23 footprint compatibility, and intentional low-leakage design for stable reference in energy-constrained systems.
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining stable output voltage across load variations by conducting reverse current above its specified Zener breakdown threshold. Its regulation is characterized at IZ = 50 μA, enabling accurate low-bias operation without significant quiescent draw.
The BZX8450-B2V4R exhibits a negative temperature coefficient of −3.5 mV/K and differential resistance of ≤600 Ω at 50 μA, ensuring predictable thermal drift and minimal dynamic impedance in feedback paths. Its 200 mA absolute maximum forward current supports transient surge handling during power-up or fault conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 2.35 V to 2.45 V at IZ = 50 μA - defines precise regulation point for low-current reference circuits |
| Tolerance | ±2 % - ensures tight voltage accuracy without post-manufacturing trimming |
| Power Dissipation (Ptot) | 250 mW at Tamb ≤ 25 °C on FR4 PCB - sets maximum continuous thermal load in standard layout |
| Forward Voltage (VF) | ≤ 0.9 V at IF = 10 mA - enables low-loss forward conduction during polarity-sensitive protection |
| Differential Resistance (rdiff) | ≤ 600 Ω at IZ = 50 μA - determines regulation stiffness and output impedance in reference divider networks |
| Reverse Leakage (IR) | ≤ 2.0 μA at VR = 1.0 V - minimizes standby current in always-on voltage monitor stages |
| Junction Temperature (Tj) | −55 °C to +150 °C - supports operation in extended industrial and automotive-adjacent environments |
Pinout & Package
SOT23 plastic surface-mount package: 3-terminal, 1.9 mm pitch, 2.9 mm × 1.3 mm × 1.0 mm body, single-sided copper FR4 mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward current entry point; connects to lower-potential node in reverse-biased Zener configuration |
| 2 | Not Connected (n.c.) | Internally unconnected terminal - must remain floating; no PCB trace or solder joint required |
| 3 | Cathode (K) | Zener breakdown terminal; connects to regulated voltage node and current-limiting resistor |
Key Features
| Feature | Design Value |
|---|---|
| Low test current regulation | Specified at 50 μA - enables stable reference generation in sub-100 μA supply domains |
| Tight voltage tolerance | ±2 % for B-series - eliminates need for external trimming in precision analog front-ends |
| Optimized leakage profile | Controlled IR ≤ 2.0 μA at 1.0 V - reduces error in high-impedance bias networks |
| Thermal stability | −3.5 mV/K temperature coefficient - allows predictable drift compensation in temperature-critical references |
| Robust surge capability | 40 W non-repetitive peak reverse power (100 μs) - withstands ESD and line transients without degradation |
Applications
| Portable Sensor Biasing | Low-Power Microcontroller Reference |
|---|---|
Use Scenario: Providing stable 2.4 V bias to MEMS accelerometer analog front-end in coin-cell-powered wearable tracker. IC Role / Device Role / Timing Role: Shunt voltage reference regulating supply rail for ADC input stage and internal oscillator bias. Use Value: Enables <1 μA sleep-mode current while maintaining ±0.5 % reference accuracy over −20 °C to +70 °C ambient range. |
Use Scenario: Generating precise reset threshold and brown-out detection voltage for ARM Cortex-M0+ MCU in smart meter endpoint. IC Role / Device Role / Timing Role: Zener-based comparator reference for POR/BOR circuitry tied to internal reset generator. Use Value: Delivers deterministic 2.4 V trigger point with <50 ppm/°C drift, eliminating need for external voltage supervisor IC. |
| IoT Node Power Monitoring | USB-C Port Voltage Clamp |
Use Scenario: Monitoring Li-ion battery voltage via resistive divider into ADC, using BZX8450-B2V4R as scaling reference. IC Role / Device Role / Timing Role: Precision voltage scaling element defining full-scale ADC input range for battery telemetry. Use Value: Achieves ±0.8 % end-to-end measurement accuracy across 2.5–4.2 V battery range with no calibration required. |
Use Scenario: Clamping CC line voltage in USB-C receptacle to prevent overvoltage damage during plug insertion. IC Role / Device Role / Timing Role: Low-capacitance (200 pF) shunt clamp limiting CC pin to 2.4 V during hot-plug transients. Use Value: Limits CC line overshoot to <2.5 V within 10 ns, preserving USB PD controller integrity without signal distortion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5222BS-7-F | 2.5 V nominal, ±5 % tolerance, 200 mW Ptot, SOT23 package | Looser tolerance and higher VZ shift sensitivity limit use in precision analog sensing | Select when ±5 % regulation accuracy suffices and 2.5 V reference aligns with system logic thresholds |
| BZX84-C2V4 | Same 2.4 V nominal but ±5 % tolerance, higher leakage (≤5 μA), and +2.5 mV/K tempco | Higher drift and leakage reduce accuracy in battery-life-critical or wide-temperature deployments | Choose only for cost-sensitive, non-precision applications where 2.4 V center-point is mandatory |
Compared with BZX8450-B2V4R, MMBZ5222BS-7-F trades accuracy for broader availability, while BZX84-C2V4 sacrifices regulation stability for lower unit cost - neither matches the B-series' ±2 % tolerance, −3.5 mV/K tempco, and 2.0 μA max leakage at 1.0 V in low-power reference roles.
Availability
BZX8450-B2V4R is available at Aetrix Electronics and suitable for portable sensor biasing, low-power microcontroller reference, and IoT node power monitoring requiring stable component supply across long-lifecycle embedded programs.
Supply support for BZX8450-B2V4R 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 components, with leadership in automotive-qualified and industrial-grade small-signal devices.
The BZX8450 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for stable voltage referencing in battery-constrained and thermally variable environments - not general-purpose regulation.
FAQ
What is the maximum continuous reverse power this diode can handle?
The BZX8450-B2V4R has a total power dissipation limit of 250 mW at ambient temperatures ≤25 °C when mounted on a standard FR4 PCB with single-sided copper. This rating assumes natural convection cooling and defines the upper bound for steady-state Zener current under regulation - exceeding it risks thermal runaway and permanent parameter shift.
Can this Zener be used in forward-biased mode as a regular diode?
Yes - its forward voltage is specified ≤0.9 V at 10 mA, making it usable as a low-drop rectifier or polarity protection element. However, its SOT23 package and 200 mA absolute maximum forward current rating require careful attention to trace width and thermal relief in PCB layout to avoid localized heating during sustained conduction.
Why does Pin 2 show 'n.c.' and how should it be handled on the PCB?
Pin 2 is internally not connected and serves no electrical function. It must remain unconnected on the PCB - no trace, pad, or solder joint should be placed at this location. Including a connection risks mechanical stress or unintended coupling; the recommended footprint follows Nexperia's SOT23 reflow land pattern with isolated Pad 2.
How does the −3.5 mV/K temperature coefficient affect circuit performance?
This negative coefficient means the Zener voltage decreases by 3.5 mV per degree Celsius rise in junction temperature. In a 2.4 V reference, that equates to ~−1460 ppm/°C drift - critical for applications requiring <0.1 % total error over temperature; compensation via series resistor or complementary NTC network is recommended for high-accuracy designs.
BZX8450-B2V4R 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):
- 2.4 V
- Tolerance:
- ±2%
- 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-B2V4R FAQ
1.How can I place an order for BZX8450-B2V4R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-B2V4R 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-B2V4R reliable?
The price and inventory of BZX8450-B2V4R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-B2V4R is usually 5 days.
3.What payment methods are accepted for BZX8450-B2V4R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-B2V4R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-B2V4R?
BZX8450-B2V4R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-B2V4R 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-B2V4R?
For technical support, including BZX8450-B2V4R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-B2V4R requirements.
6.How does Aetrix verify that BZX8450-B2V4R is sourced from the original manufacturer or authorized distributors?
All BZX8450-B2V4R 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-B2V4R meets industry standards.
7.What is the process for return or replacement of BZX8450-B2V4R?
All BZX8450-B2V4R units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-B2V4R, 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-B2V4R part is unused and in its original packaging.
Return procedure for BZX8450-B2V4R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-B2V4R Tags
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MM5Z5V1ST1G
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