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Nexperia USA Inc. BZX38450-C47-QF
- Part No.:
- BZX38450-C47-QF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-C47-QF.pdf
- Description:
- DIODE ZENER 47V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:2,457
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Product details
Overview
BZX38450-C47-QF from Nexperia is a low-current Zener voltage regulator diode in SOD323 (SC-76) package, rated for 47 V nominal working voltage at 50 µA test current, ±5 % tolerance, 300 mW total power dissipation, and qualified to AEC-Q101 for automotive use - deployed in precision biasing and low-power voltage reference circuits.
For engineers reviewing the BZX38450-C47-QF datasheet, BZX38450-C47-QF pinout, BZX38450-C47-QF application, or BZX38450-C47-QF equivalent, key selection criteria include its 47 V Zener voltage with ±5 % tolerance, low 50 µA test current specification, 300 mW power rating on FR4 PCB, AEC-Q101 qualification, and SOD323 surface-mount footprint compatibility.
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining stable reverse-biased breakdown at 47 V under low-current conditions (IZ = 50 µA), with differential resistance of 170 Ω at IZ = 2 mA and temperature coefficient of +0.05 mV/K. Its intentional minor leakage current enhances switching speed and noise reduction per AN90031.
Designed for ambient temperatures from −55 °C to +150 °C and junction temperatures up to 150 °C, it delivers 47 V regulation with 40 pF diode capacitance at VR = 0 V and f = 1 MHz, and exhibits non-repetitive peak reverse power dissipation up to 40 W for 100 µs pulses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 47 V nominal at IZ = 50 µA; ±5 % tolerance ensures stable reference in low-bias circuits |
| Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C on FR4 PCB; defines maximum continuous thermal load in compact layouts |
| Differential Resistance (rdiff) | 170 Ω max at IZ = 2 mA; determines output impedance and regulation sensitivity to current variation |
| Reverse Current (IR) | ≤ 0.05 µA at VR = 47 V; enables ultra-low quiescent current operation in battery-powered systems |
| Forward Voltage (VF) | 0.9 V max at IF = 10 mA; supports predictable forward conduction during transient or dual-polarity protection |
| Thermal Resistance (Rth(j-a)) | 415 K/W in free air; informs passive thermal design margin for derating above 25 °C ambient |
| Package | SOD323 (SC-76); 1.7 mm × 1.25 mm × 0.95 mm body with 1.3 mm lead pitch - compatible with high-density SMT assembly |
Pinout & Package
SOD323 (SC-76) plastic surface-mount package with cathode-marked end and 1.3 mm lead pitch; optimized for automated placement and reflow soldering on FR4 PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal for correct polarity orientation |
| 2 | Anode (A) | Connected to ground or lower potential; completes shunt regulation path when reverse-biased |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables stable regulation in micro-power sensor bias and portable battery applications |
| AEC-Q101 qualification | Qualified for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard |
| Optimized leakage profile | Intentional minor rise in leakage current per AN90031 improves switching response and reduces broadband noise |
| Tight thermal performance | Rth(j-sp) = 110 K/W to cathode solder point - supports accurate thermal modeling in thermally constrained modules |
Applications
| Automotive Cabin Control Module | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Providing stable 47 V reference for analog front-end biasing in HVAC control units operating across −40 °C to +105 °C ambient. IC Role / Device Role / Timing Role: Shunt voltage regulator establishing precise DC reference for ADC input scaling and op-amp offset trimming. Use Value: AEC-Q101 qualification ensures long-term stability under automotive thermal cycling; ±5 % tolerance meets ISO 16750-4 surge immunity requirements. |
Use Scenario: Regulating excitation voltage for 4–20 mA loop-powered pressure transducers in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Low-current Zener clamp maintaining constant bias despite supply ripple and load transients. Use Value: 50 µA test current enables operation from limited loop current headroom; 300 mW rating accommodates short-circuit fault energy absorption. |
| Portable Medical Diagnostic Device | Smart Energy Meter Reference Subsystem |
Use Scenario: Supplying calibrated reference for photodiode amplifier stages in handheld pulse oximeters powered by coin-cell batteries. IC Role / Device Role / Timing Role: Precision voltage reference element in low-noise analog signal chain with minimal quiescent draw. Use Value: Optimized leakage behavior reduces shot noise contribution; 40 pF capacitance avoids phase shift in feedback networks up to 1 MHz. |
Use Scenario: Generating stable 47 V rail for isolated metrology ADC bias in Class 0.2 smart electricity meters compliant with IEC 62053-22. IC Role / Device Role / Timing Role: Primary shunt regulator in multi-stage reference ladder supporting metrology-grade accuracy. Use Value: 170 Ω differential resistance limits error drift under varying load currents; AEC-Q101 grade assures field longevity beyond 15-year meter lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX38450-B47-Q | Same 47 V nominal voltage but ±2 % tolerance (vs. ±5 %); higher test current (5 mA vs. 50 µA); lower rdiff (120 Ω) | Requires higher bias current; better for precision references where tighter voltage tolerance outweighs power budget constraints | Select BZX38450-B47-Q when system-level accuracy demands <±1 % total error and supply can support ≥5 mA Zener current |
| MMSZ47ET1G | 47 V Zener, ±5 %, SOD-123 package (2.7 mm × 1.6 mm), 500 mW Ptot, 100 µA IR at VR = 47 V | Larger footprint and higher power rating; less suitable for ultra-dense automotive PCBs but more robust under surge | Choose MMSZ47ET1G only if board layout allows SOD-123 and surge immunity requires >300 mW continuous dissipation margin |
Compared with BZX38450-B47-Q, the C47-Q offers lower bias current and relaxed tolerance ideal for space-constrained, battery-sensitive designs; versus MMSZ47ET1G, it provides superior density and automotive qualification but reduced surge handling - making it optimal for AEC-compliant, miniaturized regulation nodes.
Availability
BZX38450-C47-QF is available at Aetrix Electronics and suitable for automotive cabin electronics, industrial sensor interfaces, portable medical diagnostics, and smart energy metering requiring stable component supply across extended temperature ranges and long lifecycle commitments.
Supply support for BZX38450-C47-QF 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 technologies.
The BZX38450-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for low-current voltage reference and biasing in automotive and industrial environments demanding long-term stability and thermal resilience.
FAQ
What is the exact Zener voltage tolerance and test condition for BZX38450-C47-QF?
The BZX38450-C47-QF has a nominal Zener voltage of 47 V with ±5 % tolerance, specified at a test current of 50 µA and junction temperature of 25 °C. This low-current condition enables accurate regulation in micro-power applications without loading the source.
Is BZX38450-C47-QF suitable for reflow soldering, and what footprint is recommended?
Yes, BZX38450-C47-QF is qualified for lead-free reflow soldering using the SOD323 footprint defined in Figure 10 of the datasheet: 0.6 mm × 0.5 mm solder lands, 1.15 mm × 0.8 mm occupied area, and 2.2 mm × 1.65 mm solder paste stencil opening.
How does the "intentional minor rise of leakage current" benefit circuit performance?
Per application note AN90031, the controlled leakage increase in the C-series improves dynamic response during fast voltage transients and suppresses broadband noise generation - particularly valuable in precision analog front-ends and low-jitter clock conditioning paths.
Can BZX38450-C47-QF be used in parallel for higher power handling?
No - Zener diodes exhibit negative temperature coefficients and parameter spread; paralleling introduces current imbalance and thermal runaway risk. For higher power, use a single higher-rated device or active regulation with a pass transistor, not multiple BZX38450-C47-QF units.
BZX38450-C47-QF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX38450
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Voltage - Zener (Nom) (Vz):
- 47 V
- Tolerance:
- ±5%
- Power - Max:
- 300 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:
- SOD-323
BZX38450-C47-QF FAQ
1.How can I place an order for BZX38450-C47-QF through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-C47-QF 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 BZX38450-C47-QF reliable?
The price and inventory of BZX38450-C47-QF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX38450-C47-QF is usually 5 days.
3.What payment methods are accepted for BZX38450-C47-QF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-C47-QF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-C47-QF?
BZX38450-C47-QF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-C47-QF 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 BZX38450-C47-QF?
For technical support, including BZX38450-C47-QF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-C47-QF requirements.
6.How does Aetrix verify that BZX38450-C47-QF is sourced from the original manufacturer or authorized distributors?
All BZX38450-C47-QF 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 BZX38450-C47-QF meets industry standards.
7.What is the process for return or replacement of BZX38450-C47-QF?
All BZX38450-C47-QF units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-C47-QF, 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 BZX38450-C47-QF part is unused and in its original packaging.
Return procedure for BZX38450-C47-QF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-C47-QF 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
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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