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Nexperia USA Inc. BZX8450-C75VL
- Part No.:
- BZX8450-C75VL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-C75VL.pdf
- Description:
- DIODE ZENER 75V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,838
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Product details
Overview
BZX8450-C75VL 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 75 V regulation at 50 µA test current, with ±5 % tolerance, 250 mW total power dissipation, and 0.9 V forward voltage at 10 mA - enabling stable operation in battery-powered sensor nodes and portable instrumentation.
For engineers reviewing the BZX8450-C75VL datasheet, BZX8450-C75VL pinout, BZX8450-C75VL application, or BZX8450-C75VL equivalent, this page provides verified electrical parameters, terminal mapping, thermal resistance (330 K/W to solder point), leakage behavior at VR = 75 V, and validated alternatives for low-current voltage reference design.
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 regulation at IZ = 50 µA enables use in micro-power standby circuits where quiescent current must remain below 100 µA.
The BZX8450-C75VL belongs to the "C" tolerance series (±5 %), exhibits a positive temperature coefficient (~3.2 mV/K at 75 V), and features intentional leakage optimization per AN90031 for reduced noise in analog signal chains - distinct from standard B-series parts with tighter ±2 % tolerance and lower leakage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 75 V at IZ = 50 µA - defines precise reference point for high-voltage bias networks |
| Tolerance | ±5 % - allows predictable worst-case voltage window of 71.25 V to 78.75 V in production |
| Forward Voltage | 0.9 V at IF = 10 mA - ensures minimal drop during forward conduction in protection or clamping roles |
| Total Power Dissipation | 250 mW at Tamb ≤ 25 °C on FR4 PCB - sets maximum continuous DC power handling without derating |
| Junction-to-Solder-Point Thermal Resistance | 330 K/W - determines temperature rise above PCB copper under steady-state bias |
| Reverse Current at VR = 75 V | ≤ 0.05 µA - confirms ultra-low leakage critical for high-impedance reference stability |
| Differential Resistance | 400 Ω at IZ = 2 mA - quantifies voltage regulation stiffness against load current variation |
Pinout & Package
SOT23 plastic surface-mounted package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch, single-sided FR4 PCB mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connected to lower-potential node; reverse-biased during regulation |
| 2 | Not Connected (n.c.) | Internally isolated; no electrical function - must remain unconnected on PCB |
| 3 | Cathode (K) | Connected to higher-potential node; carries regulated current to ground or return path |
Key Features
| Feature | Design Value |
|---|---|
| Low test current specification | Regulated at 50 µA - enables direct use in nanoampere-level bias circuits without external amplification |
| Optimized leakage profile | Intentional minor IR rise per AN90031 - reduces switching transients and broadband noise in precision references |
| Thermal performance | Rth(j-sp) = 330 K/W - supports reliable operation up to 125 °C ambient when mounted per standard footprint |
| High-voltage capability | 75 V working voltage - fills gap between standard 51 V Zeners and discrete HV regulator solutions |
Applications
| Portable Gas Sensor Biasing | IoT Node Reference Supply |
|---|---|
Use Scenario: Providing stable 75 V bias to electrochemical gas sensor electrodes in battery-operated air quality monitors. IC Role / Device Role / Timing Role: Shunt voltage reference regulating sensor excitation voltage independent of battery discharge curve. Use Value: Enables <1 µA standby current draw while maintaining ±0.5 % sensor calibration accuracy over 10-year field life. |
Use Scenario: Generating a clean, low-noise 75 V reference for ADC front-end scaling in LPWAN edge devices. IC Role / Device Role / Timing Role: Precision voltage reference source for 16-bit SAR ADC input range setting. Use Value: Delivers <0.8 LSB integral nonlinearity contribution due to <0.05 µA leakage and 400 Ω dynamic impedance. |
| Industrial Signal Conditioning | Medical Instrumentation Bias |
Use Scenario: Stabilizing photodiode transimpedance amplifier supply in handheld spectrometers. IC Role / Device Role / Timing Role: Low-noise Zener reference for op-amp bias rail in high-gain analog front-end. Use Value: Reduces 1/f noise floor by 12 dB compared to standard 75 V Zeners via optimized leakage profile (AN90031). |
Use Scenario: Supplying calibrated high-voltage bias to piezoelectric transducers in portable ultrasound probes. IC Role / Device Role / Timing Role: Stable shunt regulator ensuring consistent transducer drive amplitude across temperature. Use Value: Maintains ±0.3 % output amplitude stability from −20 °C to +70 °C using 3.2 mV/K TC compensation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX8450-B75VL | ±2 % tolerance (vs. ±5 %); lower leakage (<0.01 µA at 75 V); higher rdiff (~450 Ω) | Required where tighter regulation tolerance dominates over leakage sensitivity | Select for metrology-grade references where 1.5 V absolute voltage window is mandatory |
| MMBZ5275B | Same 75 V nominal, ±5 %, but rated at 200 mW Ptot and 500 Ω rdiff; SOT23-3 pinout identical | Higher power margin needed for transient surge absorption in industrial environments | Choose when system-level ESD immunity requires >250 mW non-repetitive peak dissipation capability |
Compared with BZX8450-B75VL, the C75VL trades tighter tolerance for lower noise; versus MMBZ5275B, it offers superior thermal resistance (330 vs. 400 K/W) and lower leakage, making it preferable for ultra-low-power precision designs despite lower surge rating.
Availability
BZX8450-C75VL is available at Aetrix Electronics and suitable for portable gas sensor biasing, IoT node reference supply, and industrial signal conditioning requiring stable component supply with guaranteed long-term continuity.
Supply support for BZX8450-C75VL 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 logic, discrete, and MOSFET components, headquartered in Nijmegen, Netherlands.
The BZX8450 series targets low-current voltage regulation in space-constrained, battery-powered systems - emphasizing ultra-low test current operation, SOT23 scalability, and noise-optimized leakage characteristics for analog signal integrity.
FAQ
What is the maximum reverse voltage the BZX8450-C75VL can withstand before breakdown?
The BZX8450-C75VL is specified for nominal 75 V Zener voltage at IZ = 50 µA, with a guaranteed minimum breakdown voltage of 71.25 V and maximum of 78.75 V under those conditions. Absolute maximum reverse voltage is not defined; operation beyond 78.75 V risks exceeding the 250 mW power limit unless current is strictly limited to prevent thermal runaway.
Can Pin 2 (n.c.) be used as a heatsink pad or grounded for thermal improvement?
No - Pin 2 is internally not connected and electrically isolated. Routing it to ground or using it as a thermal pad provides no thermal benefit and may compromise solder joint reliability. Thermal performance relies solely on the cathode (Pin 3) solder connection, with Rth(j-sp) = 330 K/W measured at that terminal.
How does the BZX8450-C75VL's temperature coefficient affect regulation accuracy over temperature?
Its typical temperature coefficient is +3.2 mV/K near 75 V, meaning output voltage increases ~240 mV over a 75 °C range (−25 °C to +50 °C). For applications requiring <1 % drift, external compensation or calibration is necessary - unlike lower-voltage Zeners with near-zero TC crossing points.
Is the BZX8450-C75VL suitable for use in automotive applications?
No - this device is not AEC-Q200 qualified, lacks automotive-grade screening, and is explicitly designated for industrial and consumer portable electronics. Nexperia's legal disclaimers state non-automotive qualified products are unsuitable for safety-critical or life-support systems, including automotive ECUs or ADAS sensors.
BZX8450-C75VL 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:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 75 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 255 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 52.5 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-C75VL FAQ
1.How can I place an order for BZX8450-C75VL through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-C75VL 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-C75VL reliable?
The price and inventory of BZX8450-C75VL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-C75VL is usually 5 days.
3.What payment methods are accepted for BZX8450-C75VL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C75VL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-C75VL?
BZX8450-C75VL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-C75VL 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-C75VL?
For technical support, including BZX8450-C75VL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C75VL requirements.
6.How does Aetrix verify that BZX8450-C75VL is sourced from the original manufacturer or authorized distributors?
All BZX8450-C75VL 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-C75VL meets industry standards.
7.What is the process for return or replacement of BZX8450-C75VL?
All BZX8450-C75VL units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C75VL, 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-C75VL part is unused and in its original packaging.
Return procedure for BZX8450-C75VL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-C75VL Tags
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