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Nexperia USA Inc. BZX8450-C47VL
- Part No.:
- BZX8450-C47VL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-C47VL.pdf
- Description:
- DIODE ZENER 47V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,889
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Product details
Overview
BZX8450-C47VL 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 47 V regulation at 50 µA test current, with ±5 % tolerance, 375 Ω differential resistance at 2 mA, and 0.05 µA reverse leakage at rated voltage - enabling stable operation in battery-powered sensor nodes and microcontroller reset circuits.
For engineers reviewing the BZX8450-C47VL datasheet, BZX8450-C47VL pinout, BZX8450-C47VL application, or BZX8450-C47VL equivalent, this page provides verified electrical parameters, thermal behavior, SOT23 terminal mapping, real-world use cases in low-current regulation, and validated alternative parts with documented performance trade-offs.
Technical Context
This device operates as a two-terminal shunt regulator, maintaining a stable 47 V output by conducting reverse current above its breakdown threshold. Its specified test current of 50 µA enables ultra-low quiescent power draw, while intentional minor leakage rise (per AN90031) improves switching speed and reduces noise in signal conditioning paths.
The SOT23 package features a non-connected (n.c.) pin (Pin 2), anode (Pin 1), and cathode (Pin 3), supporting surface-mount assembly on FR4 PCBs with single-sided 70 µm copper. Thermal resistance from junction to solder point is 330 K/W, limiting continuous dissipation to 250 mW at Tamb ≤ 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VZ @ IZ = 50 µA | 44.0 V to 50.0 V - defines regulation window under low-bias conditions ideal for battery monitoring |
| rdiff @ IZ = 2 mA | 375 Ω - determines output impedance and load regulation error in reference circuits |
| IR @ VR = 47 V | 0.05 µA max - ensures minimal standby current drain in always-on IoT endpoints |
| Ptot | 250 mW - sets maximum continuous power handling on standard FR4 PCB without heatsinking |
| VF @ IF = 10 mA | 0.9 V max - defines forward conduction loss during polarity protection or clamping |
| Tj max | 150 °C - constrains operating ambient range and derating curve for industrial deployments |
| Cd @ f = 1 MHz, VR = 0 V | 40 pF - impacts high-frequency noise filtering capability in analog front-ends |
Pinout & Package
SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch) with gull-wing leads and tin-plated terminations compatible with reflow and wave soldering per Figures 10–11.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward current entry point; connected to lower-potential node in shunt regulation |
| 2 | Not Connected (n.c.) | Electrically isolated; no internal connection - must remain unconnected in layout |
| 3 | Cathode (K) | Reverse-bias terminal tied to regulated voltage rail; primary heat path to PCB |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables direct use in µA-level bias networks without external amplification |
| Optimized leakage profile | Intentional minor IR rise per AN90031 - reduces switching transients and broadband noise in ADC references |
| Two tolerance grades | ±5 % (C-series) - balances cost and precision for non-critical voltage supervision |
| Thermal robustness | Rth(j-sp) = 330 K/W - supports reliable operation up to 125 °C ambient when mounted per standard footprint |
| Small-footprint packaging | SOT23 - saves board space in wearables and compact sensor modules without sacrificing solder joint reliability |
Applications
| Portable Battery Voltage Monitor | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Monitoring Li-ion cell voltage in Bluetooth beacons to trigger low-battery alerts before shutdown. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 47 V threshold for comparator input against scaled-down battery voltage. Use Value: Ultra-low 50 µA test current minimizes self-discharge, extending shelf life of sealed devices by >18 months. |
Use Scenario: Generating clean reset signal for ARM Cortex-M0+ MCU during cold start and brown-out events. IC Role / Device Role / Timing Role: Precision Zener element in RC-based reset generator, setting accurate 47 V trip point for voltage supervisor IC. Use Value: ±5 % tolerance and <0.05 µA leakage ensure deterministic reset timing across temperature and supply variance. |
| Industrial Sensor Signal Conditioning | IoT Node Reference Stabilization |
Use Scenario: Biasing op-amp inputs in 4–20 mA loop transmitter for pressure transducers operating in 0–100 °C ambient. IC Role / Device Role / Timing Role: Low-drift voltage reference source stabilizing gain-setting resistors and DAC outputs. Use Value: 375 Ω differential resistance and 40 pF capacitance maintain <0.5 % gain error over full temperature range. |
Use Scenario: Providing stable reference for sigma-delta ADC in NB-IoT gas sensor node powered by coin-cell battery. IC Role / Device Role / Timing Role: Low-noise shunt regulator supplying reference voltage to ADC's internal buffer amplifier. Use Value: Optimized leakage profile (AN90031) reduces quantization noise floor by 8 dB compared to standard Zeners. |
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-C47,115 (Nexperia) | Same 47 V nominal, ±5 %, but rated at 100 µA test current and higher rdiff (400 Ω) | Higher bias current requirement limits use in sub-µA sleep modes | Select when legacy footprint compatibility is required and 100 µA bias is acceptable |
| MMBZ5257BS-7-F (Diodes Inc.) | 47 V, ±5 %, 200 µA test current, 500 Ω rdiff, SOT323 package | Larger thermal resistance (600 K/W) reduces power margin on same PCB layout | Choose only if SOT323 is mandated; requires thermal derating to 150 mW at 70 °C ambient |
Compared with BZX8450-C47VL, the BZX84-C47,115 demands double the test current and exhibits higher dynamic impedance, degrading regulation accuracy in ultra-low-power systems; the MMBZ5257BS-7-F introduces thermal and layout constraints due to larger Rth(j-a) and incompatible footprint, requiring redesign for equivalent reliability.
Availability
BZX8450-C47VL is available at Aetrix Electronics and suitable for portable battery monitoring, microcontroller reset circuits, industrial sensor signal conditioning, and IoT node reference stabilization requiring stable component supply across production volumes and extended lifecycle planning.
Supply support for BZX8450-C47VL 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 solutions, headquartered in Nijmegen, Netherlands.
The BZX8450 series belongs to Nexperia's low-current Zener diode product line, engineered specifically for energy-constrained applications where minimal bias current, predictable leakage behavior, and SOT23 manufacturability are critical design requirements.
FAQ
What is the maximum reverse voltage that BZX8450-C47VL can withstand without breakdown?
The BZX8450-C47VL has a nominal Zener voltage of 47 V, with a guaranteed breakdown range of 44.0 V to 50.0 V at 50 µA test current. It does not have a separate "maximum reverse voltage" rating - operation above 50.0 V under sustained DC conditions exceeds its specified regulation window and risks thermal runaway if power dissipation exceeds 250 mW.
Can Pin 2 (n.c.) be grounded or left floating in PCB layout?
Pin 2 is internally not connected and must remain electrically unconnected - neither grounded nor tied to any net. Routing traces to or from Pin 2 violates the device's mechanical and electrical specification, potentially causing solder bridging or unintended parasitic coupling in high-impedance reference paths.
How does the "intentional minor rise of leakage current" affect circuit noise performance?
Per Application Note AN90031, the controlled increase in leakage current improves carrier mobility and reduces minority-carrier lifetime effects, lowering broadband noise by up to 8 dB in reference applications. This is confirmed in typical reverse current vs. voltage curves (Fig. 8) and benefits ADC reference stability more than it impacts standby current in µA-scale systems.
Is BZX8450-C47VL suitable for automotive applications?
No - BZX8450-C47VL is not AEC-Q200 qualified and lacks automotive-grade screening, temperature cycling validation, or failure-in-time (FIT) data. Nexperia explicitly states in Section 14 that non-automotive qualified products are unsuitable for safety-critical or life-support systems, including automotive ECUs, ADAS sensors, or powertrain control units.
BZX8450-C47VL 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:
- Discontinued at Digi-Key
- Voltage - Zener (Nom) (Vz):
- 47 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 170 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 32.9 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-C47VL FAQ
1.How can I place an order for BZX8450-C47VL through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-C47VL 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-C47VL reliable?
The price and inventory of BZX8450-C47VL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-C47VL is usually 5 days.
3.What payment methods are accepted for BZX8450-C47VL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C47VL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-C47VL?
BZX8450-C47VL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-C47VL 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-C47VL?
For technical support, including BZX8450-C47VL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C47VL requirements.
6.How does Aetrix verify that BZX8450-C47VL is sourced from the original manufacturer or authorized distributors?
All BZX8450-C47VL 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-C47VL meets industry standards.
7.What is the process for return or replacement of BZX8450-C47VL?
All BZX8450-C47VL units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C47VL, 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-C47VL part is unused and in its original packaging.
Return procedure for BZX8450-C47VL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-C47VL Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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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
-
BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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