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Nexperia USA Inc. BZX8450-C5V1R
- Part No.:
- BZX8450-C5V1R
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-C5V1R.pdf
- Description:
- DIODE ZENER 5.1V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,228
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Product details
Overview
BZX8450-C5V1R from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, designed for precision voltage reference and low-power biasing in portable electronics. It delivers a nominal 5.1 V regulation at 50 µA test current, with ±5 % tolerance, 500 Ω differential resistance at 5 mA, and 3.0 µA max reverse leakage at 3.0 V, enabling stable operation in battery-powered sensor nodes and microcontroller reset circuits.
For engineers reviewing the BZX8450-C5V1R datasheet, BZX8450-C5V1R pinout, BZX8450-C5V1R application, or BZX8450-C5V1R equivalent, this page provides verified electrical parameters, thermal behavior, SOT23 terminal mapping, and validated alternative parts for low-current Zener replacement in space-constrained designs.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified working voltage of 4.85 V (min) to 5.36 V (max) at IZ = 50 µA. Its differential resistance is 500 Ω (max) at 5 mA, and temperature coefficient is −2.0 mV/K - indicating negative drift over temperature, critical for ambient-stable references.
The device features intentional minor leakage current optimization per AN90031 for fast switching and noise reduction, and exhibits 130 pF capacitance at 0 V and 1 MHz. Thermal resistance from junction to ambient is 500 K/W on standard FR4 PCB, limiting continuous power dissipation to 250 mW at Tamb ≤ 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 5.1 V at IZ = 50 µA - defines primary regulation point for low-bias applications |
| Voltage Tolerance | ±5 % - supports cost-sensitive designs where tighter tolerance is not required |
| Differential Resistance | 500 Ω max at IZ = 5 mA - determines output impedance and load regulation error |
| Reverse Leakage Current | 3.0 µA max at VR = 3.0 V - enables ultra-low standby power in battery systems |
| Forward Voltage | 0.9 V max at IF = 10 mA - ensures minimal forward conduction loss if used bidirectionally |
| Total Power Dissipation | 250 mW max at Tamb ≤ 25 °C - sets thermal derating boundary on standard PCB |
| Junction Temperature Limit | 150 °C - constrains maximum operating ambient when mounted on FR4 |
Pinout & Package
SOT23 plastic surface-mount package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch, single-sided copper FR4 mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connects to lower-potential side in reverse-bias regulation configuration |
| 2 | Not Connected (n.c.) | Internally unconnected; must remain floating - no PCB trace or solder joint |
| 3 | Cathode (K) | Connects to higher-potential side; polarity marker for correct orientation during placement |
Key Features
| Feature | Design Value |
|---|---|
| Low Test Current Operation | Specified at 50 µA - enables use in µA-level bias networks without compromising regulation accuracy |
| Optimized Leakage Profile | Intentional minor rise per AN90031 - reduces switching noise and improves transient response in feedback paths |
| Small-Signal Zener Stability | −2.0 mV/K tempco at 5.1 V - predictable negative drift allows compensation in reference ladder designs |
| Low Capacitance | 130 pF at 0 V, 1 MHz - minimizes high-frequency loading in oscillator or RF detector bias rails |
Applications
| Microcontroller Reset Circuit | Portable Sensor Bias Rail |
|---|---|
Use Scenario: Provides clean, low-current 5.1 V reference to enable/disable reset logic in battery-powered MCU systems. IC Role / Device Role / Timing Role: Zener voltage reference establishing threshold for reset comparator input. Use Value: 3.0 µA max leakage at 3.0 V preserves battery life over multi-year deployments in IoT endpoints. |
Use Scenario: Supplies stable bias voltage to analog front-end amplifiers in wearable health sensors. IC Role / Device Role / Timing Role: Low-noise voltage clamp regulating op-amp supply rail under varying load conditions. Use Value: Optimized leakage profile per AN90031 suppresses switching artifacts that would corrupt sub-mV signal integrity. |
| USB-C PD Auxiliary Reference | Low-Power ADC Reference Divider |
Use Scenario: Generates auxiliary 5.1 V reference for USB-C power delivery negotiation ICs in compact chargers. IC Role / Device Role / Timing Role: Precision shunt regulator feeding voltage monitor inputs in PD controller feedback loop. Use Value: ±5 % tolerance and 500 Ω dynamic resistance ensure consistent detection across production batches without trimming. |
Use Scenario: Forms top leg of resistor divider supplying scaled reference to 12-bit SAR ADC in energy-harvesting nodes. IC Role / Device Role / Timing Role: Stable Zener node defining upper voltage bound of resistive divider network. Use Value: 130 pF capacitance avoids phase shift in high-impedance divider, preserving ADC acquisition accuracy. |
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 | 5.1 V ±5 %, 225 Ω rdiff at 20 mA, 100 nA IR at 3 V - lower dynamic impedance but higher test current | Requires ≥20 mA bias for spec compliance; unsuitable for µA-biased circuits | Select only when higher bias current is available and tighter regulation under load is prioritized |
| BZX84-C5V1 | Same 5.1 V ±5 %, identical SOT23 pinout, but 600 Ω rdiff at 5 mA and 5.0 µA IR at 3 V - higher leakage and impedance | Acceptable for non-critical biasing where leakage <5 µA is tolerable | Choose for legacy compatibility where BZX8450-C5V1R's lower leakage and improved rdiff are unnecessary |
Compared with MMBZ5222BS-7-F, BZX8450-C5V1R enables true low-current operation down to 50 µA while maintaining tighter leakage control; versus BZX84-C5V1, it delivers 17 % lower dynamic impedance and 40 % less reverse leakage - directly improving reference stability in battery-constrained systems.
Availability
BZX8450-C5V1R is available at Aetrix Electronics and suitable for portable sensor bias rails, microcontroller reset circuits, and USB-C PD auxiliary references requiring stable component supply with tight lot-to-lot Zener voltage consistency.
Supply support for BZX8450-C5V1R 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 portfolio, engineered specifically for ultra-low-power voltage regulation in battery-operated and space-constrained electronics.
FAQ
What is the maximum reverse voltage this Zener can regulate before breakdown?
The BZX8450-C5V1R has a nominal Zener voltage of 5.1 V, with guaranteed regulation range from 4.85 V (min) to 5.36 V (max) at IZ = 50 µA. It does not regulate above 5.36 V - beyond that, avalanche conduction increases rapidly and may exceed safe power limits unless current is strictly limited by external series resistance.
Can Pin 2 be grounded or left unconnected on the PCB?
Pin 2 is internally not connected (n.c.) and must remain electrically floating - neither grounded nor tied to any net. Connecting it risks internal shorting or undefined behavior. The SOT23 footprint should omit solder paste and copper for Pin 2, matching Nexperia's recommended wave/reeflow land patterns.
How does the −2.0 mV/K temperature coefficient affect long-term reference stability?
A −2.0 mV/K coefficient means the Zener voltage decreases by 2 mV per Kelvin rise in junction temperature. Over a 50 °C ambient range (25–75 °C), this yields ~100 mV drift - acceptable for non-precision applications but requires compensation (e.g., complementary tempcos or calibration) in systems demanding <0.5 % reference stability.
Is this part suitable for use in automotive applications?
No. The BZX8450-C5V1R is not automotive-qualified per Nexperia's legal disclaimers. It lacks AEC-Q101 stress testing, extended temperature validation beyond −55 °C to +150 °C, and automotive-specific reliability reporting. Use only in industrial, consumer, or portable electronics where automotive qualification is not mandated.
BZX8450-C5V1R 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):
- 5.1 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 60 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 3 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-C5V1R FAQ
1.How can I place an order for BZX8450-C5V1R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-C5V1R 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-C5V1R reliable?
The price and inventory of BZX8450-C5V1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-C5V1R is usually 5 days.
3.What payment methods are accepted for BZX8450-C5V1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C5V1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-C5V1R?
BZX8450-C5V1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-C5V1R 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-C5V1R?
For technical support, including BZX8450-C5V1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C5V1R requirements.
6.How does Aetrix verify that BZX8450-C5V1R is sourced from the original manufacturer or authorized distributors?
All BZX8450-C5V1R 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-C5V1R meets industry standards.
7.What is the process for return or replacement of BZX8450-C5V1R?
All BZX8450-C5V1R units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C5V1R, 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-C5V1R part is unused and in its original packaging.
Return procedure for BZX8450-C5V1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-C5V1R Tags
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MM5Z5V1ST1G
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