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Nexperia USA Inc. BZX8450-C2V0VL
- Part No.:
- BZX8450-C2V0VL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-C2V0VL.pdf
- Description:
- DIODE ZENER 2V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,990
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Product details
Overview
BZX8450-C2V0VL from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, designed for precision voltage reference and biasing in ultra-low-power circuits. It delivers 2.0 V nominal Zener voltage at 50 µA test current, with ±5 % tolerance, 600 Ω differential resistance at 5 mA, and 220 pF capacitance at 0 V - enabling stable regulation in portable battery-powered sensor nodes and microcontroller reset circuits.
For engineers reviewing the BZX8450-C2V0VL datasheet, BZX8450-C2V0VL pinout, BZX8450-C2V0VL application, or BZX8450-C2V0VL equivalent, this page provides verified electrical parameters, thermal behavior, SOT23 terminal mapping, and real-world use cases for low-bias analog signal conditioning and power-rail supervision.
Technical Context
This device operates as a two-terminal shunt regulator, maintaining stable reverse breakdown voltage across its cathode-anode terminals under controlled current conditions. Its specified 50 µA test current enables accurate low-power biasing, while intentional leakage optimization (per AN90031) reduces switching noise in high-impedance feedback paths.
The SOT23 package imposes thermal constraints: junction-to-ambient resistance is 500 K/W in free air, limiting continuous dissipation to 250 mW at ≤25 °C ambient. Reverse voltage regulation is validated from 1.8 V to 51 V across B/C series variants, with temperature coefficients ranging from −3.5 mV/K (low-VZ) to +4.5 mV/K (high-VZ).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 1.88 V to 2.12 V at IZ = 50 µA - defines precise regulation threshold for low-voltage logic supply monitoring |
| Differential Resistance (rdiff) | 600 Ω max at IZ = 5 mA - determines output impedance and load regulation error in reference circuits |
| Forward Voltage (VF) | ≤ 0.9 V at IF = 10 mA - ensures minimal forward conduction loss when used bidirectionally or in clamping |
| Total Power Dissipation (Ptot) | 250 mW at Tamb ≤ 25 °C on FR4 PCB - sets maximum continuous bias current limit (~125 mA at 2 V) |
| Diode Capacitance (Cd) | 220 pF at VR = 0 V, f = 1 MHz - impacts high-frequency noise filtering and stability in RC-based timing networks |
| Reverse Current (IR) | ≤ 1.0 µA at VR = 1.0 V - ensures negligible quiescent current draw in always-on battery backup rails |
| Junction Temperature (Tj) | −55 °C to +150 °C - supports operation in extended industrial environments without derating below −40 °C |
Pinout & Package
SOT23 plastic surface-mount package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm lead pitch, single-sided copper FR4 mounting. Thermal resistance from junction to solder point is 330 K/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connected to lower-potential node; reverse-biased during regulation; carries full bias current in shunt configuration |
| 2 | Not Connected (n.c.) | Internally unconnected; must remain floating - no PCB trace or thermal pad connection permitted |
| 3 | Cathode (K) | Connected to regulated voltage rail; serves as reference output node; primary heat path to PCB via solder point |
Key Features
| Feature | Design Value |
|---|---|
| Low-test-current specification | Rated at 50 µA - enables accurate voltage setting in nanoampere-bias circuits like CMOS oscillator references |
| Optimized leakage profile | Intentional minor rise per AN90031 - reduces transient noise during switching transitions in ADC reference buffers |
| Tight voltage tolerance | ±5 % for C-series - supports cost-sensitive designs requiring predictable turn-on without trimming resistors |
| Ultra-low forward drop | ≤ 0.9 V at 10 mA - allows dual-use as clamp diode in mixed-signal I/O protection without degrading logic thresholds |
| High-temperature capability | 150 °C max junction temperature - sustains reliability in sealed enclosures with passive convection cooling |
Applications
| Microcontroller Reset Circuit | Low-Power Sensor Biasing |
|---|---|
Use Scenario: Generating a stable 2.0 V reset threshold for an ultra-low-power MCU operating from a 3.3 V coin-cell supply. IC Role / Device Role / Timing Role: Shunt Zener regulator providing precise voltage reference to a comparator-based reset generator. Use Value: Enables reliable brown-out detection down to 2.1 V supply while drawing only 0.5 µA quiescent current at 2.0 V output. |
Use Scenario: Biasing the gate of a low-leakage JFET in a pH electrode amplifier front-end. IC Role / Device Role / Timing Role: Voltage reference source establishing fixed DC offset for transimpedance amplifier input stage. Use Value: Delivers <1.0 µA reverse leakage at 1.0 V reverse bias, preventing input offset drift in femtoampere-level current measurement. |
| Portable Audio DAC Reference | IoT Node Battery Monitor |
Use Scenario: Providing clean 2.0 V reference for a 16-bit audio DAC in a Bluetooth headset with shared LDO supply. IC Role / Device Role / Timing Role: Low-noise shunt regulator decoupling DAC reference pin from digital supply ripple. Use Value: 220 pF capacitance and optimized leakage suppress high-frequency switching noise coupling into analog ground plane. |
Use Scenario: Monitoring lithium coin-cell voltage decay in a wireless environmental sensor node. IC Role / Device Role / Timing Role: Precision voltage divider element in a resistor-Zener network feeding ADC input. Use Value: ±5 % tolerance and −3.5 mV/K tempco ensure <20 mV total error over −20 °C to +70 °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 |
|---|---|---|---|
| BZX84-C2V0 | Same 2.0 V nominal, ±5 %, but rated at 350 mW Ptot and 300 µA test current | Higher power handling suits higher-current bias networks; less suitable for sub-1 µA leakage-critical designs | Select when >100 µA bias current is available and thermal margin exceeds 330 K/W |
| MMSZ4678 | 2.0 V nominal, ±5 %, 500 mW Ptot, but 10 mA test current and 100 Ω rdiff | Lower dynamic impedance improves load regulation but increases minimum bias requirement by 200× | Prefer for buffered reference outputs where 10 mA bias is acceptable and tighter regulation under load is required |
Compared with BZX8450-C2V0VL, BZX84-C2V0 offers higher power headroom but coarser low-current regulation, while MMSZ4678 delivers superior dynamic performance at the cost of significantly higher quiescent current - making the BZX8450-C2V0VL optimal for true ultra-low-power, high-impedance reference nodes.
Availability
BZX8450-C2V0VL is available at Aetrix Electronics and suitable for microcontroller reset circuits, portable sensor biasing, IoT battery monitoring, and low-noise audio reference applications requiring stable component supply across production lifecycles.
Supply support for BZX8450-C2V0VL 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-performance, energy-efficient components for automotive, industrial, and consumer electronics, with leadership in logic, discrete, and MOSFET technologies.
The BZX8450 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for battery-powered and high-impedance analog systems where minimal leakage, low test current, and tight voltage tolerance are critical design requirements.
FAQ
What is the maximum continuous reverse current for stable Zener operation?
The BZX8450-C2V0VL is characterized at 50 µA test current but supports up to 5 mA reverse current with specified differential resistance ≤600 Ω. At 5 mA, power dissipation reaches 10 mW - well within the 250 mW limit. Operation beyond 5 mA requires thermal verification using Rth(j-a) = 500 K/W to avoid exceeding 150 °C junction temperature.
Can Pin 2 be used as a thermal pad or grounded for improved heat dissipation?
No - Pin 2 is explicitly marked "n.c." (not connected) in the official Nexperia pinning diagram and internal construction. Connecting it to ground, power, or a thermal pad violates the device's mechanical and electrical design, risks shorting internal structures, and voids thermal performance guarantees. Only Pins 1 (anode) and 3 (cathode) are functional terminals.
How does the ±5 % tolerance affect accuracy in a 2.0 V reference application?
At 2.0 V nominal, ±5 % tolerance means the actual Zener voltage falls between 1.88 V and 2.12 V at 50 µA. This 240 mV span directly translates to reference uncertainty - e.g., in a reset circuit, it shifts the trip point by ±120 mV. For tighter accuracy, system-level calibration or post-assembly trimming is required; the device itself provides repeatability, not absolute precision.
Is this diode suitable for ESD protection in I/O lines?
No - the BZX8450-C2V0VL is not rated or characterized for ESD protection. Its non-repetitive peak reverse power dissipation is 40 W only for 100 µs pulses, and it lacks defined clamping voltage, response time, or human-body-model (HBM) ratings. Dedicated TVS diodes such as PESD5V0S1BA should be used for I/O line ESD suppression.
BZX8450-C2V0VL 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 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 7 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-C2V0VL FAQ
1.How can I place an order for BZX8450-C2V0VL through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-C2V0VL 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-C2V0VL reliable?
The price and inventory of BZX8450-C2V0VL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-C2V0VL is usually 5 days.
3.What payment methods are accepted for BZX8450-C2V0VL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C2V0VL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-C2V0VL?
BZX8450-C2V0VL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-C2V0VL 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-C2V0VL?
For technical support, including BZX8450-C2V0VL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C2V0VL requirements.
6.How does Aetrix verify that BZX8450-C2V0VL is sourced from the original manufacturer or authorized distributors?
All BZX8450-C2V0VL 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-C2V0VL meets industry standards.
7.What is the process for return or replacement of BZX8450-C2V0VL?
All BZX8450-C2V0VL units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C2V0VL, 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-C2V0VL part is unused and in its original packaging.
Return procedure for BZX8450-C2V0VL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-C2V0VL Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
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