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Nexperia USA Inc. BZX8450-C47-QVL
- Part No.:
- BZX8450-C47-QVL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-C47-QVL.pdf
- Description:
- DIODE ZENER 47V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,150
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Product details
Overview
BZX8450-C47-Q from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, designed for precision voltage reference and clamping in battery-powered systems. 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 biasing in automotive sensor interfaces and portable instrumentation.
For engineers reviewing the BZX8450-C47-Q datasheet, BZX8450-C47-Q pinout, BZX8450-C47-Q application, or BZX8450-C47-Q equivalent, this page provides verified electrical characteristics, AEC-Q101 qualification status, thermal resistance data (Rth(j-a) = 500 K/W), and direct replacement guidance for low-power Zener-based regulation circuits.
Technical Context
This device operates as a two-terminal shunt regulator, maintaining stable output voltage across its cathode-anode terminals under reverse-bias conditions. Its 47 V nominal Zener voltage is specified at IZ = 50 µA, with differential resistance of 375 Ω at IZ = 2 mA and temperature coefficient of +42.0 mV/K - indicating positive voltage drift with junction temperature rise.
The SOT23 package features Pin 1 (anode), Pin 2 (not connected), and Pin 3 (cathode), supporting surface-mount assembly on FR4 PCBs with single-sided 70 µm copper. Thermal performance is defined by Rth(j-sp) = 330 K/W to the cathode solder point, critical for power derating in compact automotive modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 44.0 V to 50.0 V at IZ = 50 µA - defines regulation window for overvoltage protection in 48 V automotive subsystems |
| Differential Resistance (rdiff) | 375 Ω at IZ = 2 mA - determines output impedance and load regulation error in reference circuits |
| Reverse Leakage (IR) | 0.05 µA at VR = 47 V - enables ultra-low quiescent current in always-on battery monitoring paths |
| Forward Voltage (VF) | 0.9 V at IF = 10 mA - sets forward conduction loss during polarity protection or ESD clamp operation |
| Power Dissipation (Ptot) | 250 mW at Tamb ≤ 25 °C - limits continuous regulation current to ~5.3 mA at 47 V without heatsinking |
| Thermal Resistance (Rth(j-a)) | 500 K/W in free air - requires PCB copper area planning for >100 mW operation in ambient >70 °C environments |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD (HBM ≥ 2 kV) |
Pinout & Package
SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch) with three terminals; Pin 2 is internally not connected and must remain unconnected on PCB layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connects to lower-potential node in reverse-bias regulation; carries full load current during Zener conduction |
| 2 | Not Connected | No internal bond wire; must be left floating - no trace or pad required on PCB |
| 3 | Cathode | Connects to regulated voltage rail; serves as thermal path to PCB via solder point (Rth(j-sp) = 330 K/W) |
Key Features
| Feature | Design Value |
|---|---|
| Low Test Current Operation | Specified at 50 µA - enables use in microamp-level bias networks without loading sensitive signal sources |
| Optimized Leakage Profile | Intentional minor IR rise per AN90031 - reduces switching noise in fast transient detection circuits |
| Automotive Qualification | AEC-Q101 compliant - supports deployment in engine control units, body electronics, and ADAS sensor modules |
| Tight Tolerance Option | ±5 % (C-series) - balances cost and accuracy for non-critical voltage references in industrial controls |
| Thermal Performance | Rth(j-sp) = 330 K/W - allows predictable derating when mounted on standard FR4 with tin-plated copper |
Applications
| Automotive Sensor Biasing | Portable Instrumentation Reference |
|---|---|
Use Scenario: Providing stable excitation voltage to resistive temperature detectors (RTDs) in engine coolant temperature sensors. IC Role / Device Role / Timing Role: Shunt voltage reference regulating 47 V supply rail to ±5 % tolerance under varying load and temperature. Use Value: Enables <1 % measurement error over −40 °C to +125 °C ambient due to low IR drift and AEC-Q101 thermal stability. |
Use Scenario: Generating precise reference for 12-bit ADC in handheld multimeter front-end. IC Role / Device Role / Timing Role: Low-current Zener clamp establishing 47 V reference node with minimal battery drain. Use Value: Delivers 0.05 µA leakage at 47 V, extending alkaline battery life to >1,000 hours in sleep mode. |
| Industrial Signal Conditioning | Overvoltage Protection Clamping |
Use Scenario: Stabilizing op-amp bias in 4–20 mA loop transmitter for factory automation. IC Role / Device Role / Timing Role: Two-terminal shunt regulator maintaining 47 V rail despite 10–30 mA loop current variation. Use Value: 375 Ω rdiff ensures <150 mV output shift across full load range, preserving loop accuracy. |
Use Scenario: Clamping transients on CAN FD bus power line in vehicle infotainment head unit. IC Role / Device Role / Timing Role: Fast-response Zener absorbing surge energy above 47 V while limiting peak voltage. Use Value: Withstands 40 W non-repetitive surges (tp = 100 µs), protecting downstream PMICs per ISO 7637-2. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C47 | Non-AEC-Q101; same VZ tolerance and rdiff, but higher IR (0.1 µA) and no automotive qualification | Limited to commercial-grade consumer electronics; unsuitable for under-hood automotive use | Select when cost sensitivity outweighs automotive reliability requirements and board space permits larger SOD-323 footprint |
| MMSZ5270B | Same 47 V rating but ±5 % tolerance, 1000 Ω rdiff at 20 mA, and 200 mW Ptot - higher impedance and lower power handling | Less stable under dynamic loads; requires higher bias current for low-noise operation | Prefer only if existing design uses MMSZ5270B footprint and thermal margin exceeds 150 mW derating needs |
Compared with BZX8450-C47-Q, BZX84-C47 lacks AEC-Q101 validation and exhibits higher leakage, while MMSZ5270B trades regulation accuracy for wider availability but sacrifices low-current stability and thermal robustness in constrained layouts.
Availability
BZX8450-C47-Q is available at Aetrix Electronics and suitable for automotive sensor biasing, portable instrumentation reference, and industrial signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZX8450-C47-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 focused on high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and advanced packaging.
The BZX8450-Q series belongs to Nexperia's automotive Zener portfolio, engineered specifically for low-current, high-stability voltage regulation in harsh-environment electronic control units and sensor interfaces.
FAQ
What is the maximum continuous reverse current the BZX8450-C47-Q can handle at 25 °C?
The device supports up to 5.3 mA continuous reverse current at 47 V before reaching its 250 mW total power dissipation limit at Tamb ≤ 25 °C. Derating is required above 25 °C per the 500 K/W junction-to-ambient thermal resistance, reducing usable current to ~3.2 mA at 85 °C ambient on standard FR4 PCB.
Does Pin 2 require PCB connection or grounding?
No - Pin 2 is internally not connected and must remain unconnected on the PCB layout. Neither routing nor copper pour should contact this pad, as it serves no electrical function and connecting it risks mechanical stress or unintended parasitic coupling in high-frequency applications.
How does the BZX8450-C47-Q's temperature coefficient affect regulation accuracy over −40 °C to +125 °C?
With a specified +42.0 mV/K temperature coefficient, the Zener voltage increases by approximately 6.3 V across the full automotive temperature range. This 13.4 % drift must be compensated in precision applications via external circuitry or calibration; it is acceptable for non-critical clamping where absolute voltage accuracy is secondary to threshold consistency.
Can the BZX8450-C47-Q replace the BZX8450-B47-Q in an existing design?
Yes - both share identical SOT23 pinout, 47 V nominal Zener voltage, and AEC-Q101 qualification, but the C-series has ±5 % tolerance versus B-series ±2 %. Substitution is valid if system-level tolerance budget allows ±5 % regulation error; no layout or thermal changes are needed.
BZX8450-C47-QVL 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BZX8450-C47-QVL FAQ
1.How can I place an order for BZX8450-C47-QVL through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-C47-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-C47-QVL reliable?
The price and inventory of BZX8450-C47-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-C47-QVL is usually 5 days.
3.What payment methods are accepted for BZX8450-C47-QVL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C47-QVL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-C47-QVL?
BZX8450-C47-QVL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-C47-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-C47-QVL?
For technical support, including BZX8450-C47-QVL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C47-QVL requirements.
6.How does Aetrix verify that BZX8450-C47-QVL is sourced from the original manufacturer or authorized distributors?
All BZX8450-C47-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-C47-QVL meets industry standards.
7.What is the process for return or replacement of BZX8450-C47-QVL?
All BZX8450-C47-QVL units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C47-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-C47-QVL part is unused and in its original packaging.
Return procedure for BZX8450-C47-QVL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-C47-QVL Tags
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MMBZ5240B-7-F
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
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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
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BZT52C3V6LP-7
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SMAZ12-13-F
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