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Nexperia USA Inc. BZX8450-C5V1-QVL
- Part No.:
- BZX8450-C5V1-QVL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-C5V1-QVL.pdf
- Description:
- DIODE ZENER 5.1V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:29,180
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Product details
Overview
BZX8450-C5V1-Q from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, designed for precision voltage reference and biasing in low-power circuits; nominal Zener voltage 5.1 V ±5 %, specified at 50 μA test current, with 250 mW total power dissipation and AEC-Q101 qualification for automotive use.
For engineers reviewing the BZX8450-C5V1-Q datasheet, BZX8450-C5V1-Q pinout, BZX8450-C5V1-Q application, or BZX8450-C5V1-Q equivalent, this page delivers verified electrical characteristics, thermal behavior, automotive-grade reliability data, and real-world implementation guidance for battery-powered and space-constrained regulation tasks.
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 breakdown threshold. Its 5.1 V nominal Zener voltage exhibits a temperature coefficient of −2.0 mV/K and differential resistance of 500 Ω at 50 μA, optimized for low-bias operation.
The SOT23 package enables surface-mount integration with thermal resistance from junction to ambient of 500 K/W (free air) and 330 K/W (solder point), supporting reliable operation up to 150 °C junction temperature under defined PCB mounting conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.85 V to 5.36 V at IZ = 50 µA - defines tight regulation window for 5.1 V nominal reference |
| Differential Resistance (rdiff) | 500 Ω at IZ = 50 µA - determines output impedance and load regulation sensitivity |
| Temperature Coefficient (SZ) | −2.0 mV/K - quantifies voltage drift per degree Celsius, critical for thermal stability in automotive environments |
| Forward Voltage (VF) | ≤ 0.9 V at IF = 10 mA - ensures minimal conduction loss when used in forward-biased protection paths |
| Total Power Dissipation (Ptot) | 250 mW at Tamb ≤ 25 °C on FR4 PCB - sets maximum continuous power handling under standard layout conditions |
| Reverse Current (IR) | ≤ 3.0 µA at VR = 3.0 V - confirms low leakage below breakdown, essential for standby power integrity |
| Junction Temperature (Tj) | −55 °C to +150 °C - supports operation across full automotive ambient range including under-hood applications |
Pinout & Package
Package: SOT23 plastic surface-mounted package; 3-terminal, 1.9 mm pitch, 2.9 mm × 1.3 mm × 1.0 mm body; qualified per AEC-Q101 for automotive reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-biased terminal; connects to lower-potential node in shunt regulation configuration |
| 2 | Not Connected (n.c.) | Internally unconnected; must remain floating-no PCB trace or solder joint required |
| 3 | Cathode (K) | Reverse-biased terminal; connects to regulated voltage rail and current-limiting resistor |
Key Features
| Feature | Design Value |
|---|---|
| Low test current specification | Rated at 50 µA - enables stable regulation in ultra-low-power systems such as coin-cell IoT sensors and sleep-mode microcontrollers |
| Automotive qualification | AEC-Q101 compliant - guarantees robustness against thermal cycling, humidity, and mechanical stress in vehicle ECUs and ADAS modules |
| Controlled leakage optimization | Intentional minor rise in leakage for fast switching and noise reduction - improves transient response in feedback loops and reduces EMI in sensitive analog stages |
| Tolerance series | ±5 % (C-series) - balances cost and precision for non-critical biasing and clamping where absolute accuracy is secondary to stability |
Applications
| Automotive Body Control Module (BCM) | Portable Medical Sensor Biasing |
|---|---|
Use Scenario: Providing stable 5.1 V reference for LIN bus transceiver bias and microcontroller ADC reference in door module electronics. IC Role / Device Role / Timing Role: Shunt voltage regulator establishing precise DC bias point for analog front-end and communication ICs. Use Value: Maintains regulation accuracy within ±5 % over −40 °C to +125 °C ambient, ensuring signal integrity despite engine bay thermal transients. |
Use Scenario: Supplying low-current bias voltage to op-amp input stages and thermistor interface circuits in handheld pulse oximeters. IC Role / Device Role / Timing Role: Passive voltage reference element enabling accurate sensor signal conditioning with minimal quiescent current draw. Use Value: Draws only 50 µA test current, extending single AAA battery life beyond 12 months in intermittent-use diagnostic devices. |
| Industrial PLC Input Protection | Smart Home Smoke Detector MCU Reference |
Use Scenario: Clamping and regulating 5 V supply rail for digital isolator inputs receiving 24 V field signals via resistive divider networks. IC Role / Device Role / Timing Role: Overvoltage clamp and local regulation node protecting downstream logic from induced surges and supply ripple. Use Value: Withstands non-repetitive 40 W peak reverse power (100 µs pulse), suppressing fast transients without degradation. |
Use Scenario: Generating stable 5.1 V reference for low-power ARM Cortex-M0+ MCU and electrochemical CO sensor excitation circuitry. IC Role / Device Role / Timing Role: Precision shunt regulator defining system reference voltage during both active and deep-sleep modes. Use Value: −2.0 mV/K temperature coefficient minimizes reference drift across storage temperatures (−20 °C to +60 °C), ensuring calibration retention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C5V1,115 | Same SOT23 package and 5.1 V ±5 % rating, but not AEC-Q101 qualified; higher typical rdiff (600 Ω vs. 500 Ω at 50 µA) | Limited to industrial/commercial grade designs without automotive reliability requirements | Select when cost sensitivity outweighs automotive qualification and tighter dynamic impedance is unnecessary |
| MMSZ5231B-7-F | 5.1 V ±5 %, SOD-123 package, 500 mW Ptot, rdiff = 17 Ω at 20 mA - optimized for higher-current regulation, not low-bias operation | Suitable for general-purpose 5 V rail regulation but unsuitable for sub-100 µA bias networks due to higher test current (20 mA) | Choose only if design requires higher current capability and can accommodate larger footprint and different thermal profile |
Compared with BZX8450-C5V1-Q, the BZX84-C5V1,115 lacks automotive qualification and has higher dynamic impedance, while MMSZ5231B-7-F demands significantly higher operating current and cannot replicate the 50 µA low-bias performance critical for battery longevity and thermal management.
Availability
BZX8450-C5V1-Q is available at Aetrix Electronics and suitable for automotive body control modules, portable medical sensor biasing, and industrial PLC input protection requiring stable component supply with guaranteed AEC-Q101 compliance and long-term lifecycle support.
Supply support for BZX8450-C5V1-Q 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 delivering high-performance, reliable discrete, logic, and MOSFET solutions with focus on efficiency, miniaturization, and automotive-grade quality.
The BZX8450-Q series belongs to Nexperia's automotive-qualified Zener diode product line, engineered specifically for low-current voltage reference and biasing in space-constrained, thermally demanding environments such as vehicle ECUs and portable safety-critical electronics.
FAQ
What is the maximum reverse voltage before breakdown for BZX8450-C5V1-Q?
The device exhibits a nominal Zener voltage of 5.1 V with guaranteed minimum 4.85 V and maximum 5.36 V at 50 µA test current. Breakdown occurs sharply within this band; applying reverse voltage below 4.85 V yields <3.0 µA leakage at 3.0 V, confirming stable non-conducting behavior prior to regulation onset.
Can BZX8450-C5V1-Q be used in parallel for higher power handling?
No - Zener diodes exhibit manufacturing tolerance and temperature-dependent VZ variation, causing current imbalance and potential thermal runaway when paralleled. For higher power, select a single higher-rated device like BZX8450-C5V1-Q's 500 mW variants or implement active regulation instead.
Is Pin 2 truly unused, or does it require grounding?
Pin 2 is explicitly marked "n.c." (not connected) in Nexperia's official pinning diagram and package outline. It is internally unconnected and must remain electrically floating-no PCB trace, solder joint, or grounding is permitted, as connection may compromise reliability or cause parametric shift.
How does the −2.0 mV/K temperature coefficient affect long-term stability in automotive applications?
This coefficient means the Zener voltage decreases by 2.0 mV per °C rise in junction temperature. Over a −40 °C to +125 °C range, total drift is ≤ ±330 mV - well within the ±5 % (±255 mV) tolerance band, ensuring functional stability even under extreme thermal cycling in engine compartments or dashboard assemblies.
BZX8450-C5V1-QVL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX8450-Q
- 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:
- -55°C ~ 150°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BZX8450-C5V1-QVL FAQ
1.How can I place an order for BZX8450-C5V1-QVL through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-C5V1-QVL 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-C5V1-QVL reliable?
The price and inventory of BZX8450-C5V1-QVL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-C5V1-QVL is usually 5 days.
3.What payment methods are accepted for BZX8450-C5V1-QVL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C5V1-QVL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-C5V1-QVL?
BZX8450-C5V1-QVL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-C5V1-QVL 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-C5V1-QVL?
For technical support, including BZX8450-C5V1-QVL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C5V1-QVL requirements.
6.How does Aetrix verify that BZX8450-C5V1-QVL is sourced from the original manufacturer or authorized distributors?
All BZX8450-C5V1-QVL 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-C5V1-QVL meets industry standards.
7.What is the process for return or replacement of BZX8450-C5V1-QVL?
All BZX8450-C5V1-QVL units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C5V1-QVL, 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-C5V1-QVL part is unused and in its original packaging.
Return procedure for BZX8450-C5V1-QVL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-C5V1-QVL 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
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
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