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Nexperia USA Inc. BZX38450-C47F
- Part No.:
- BZX38450-C47F
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-C47F.pdf
- Description:
- DIODE ZENER 47V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:3,035
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Product details
Overview
BZX38450-C47F 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, with ±5 % tolerance, 300 mW total power dissipation, and 0.9 V forward voltage at 10 mA - used for precision biasing and voltage reference in portable battery-powered sensor nodes and low-power microcontroller reset circuits.
For engineers reviewing the BZX38450-C47F datasheet, BZX38450-C47F pinout, BZX38450-C47F application, or BZX38450-C47F equivalent, this page delivers verified electrical characteristics, thermal resistance values, differential resistance (375 Ω at IZ = 0.5 mA), temperature coefficient (+0.05 mV/K), and reverse leakage behavior critical for low-quiescent-current design validation.
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining stable 47 V output across load variations by conducting reverse current above its Zener breakdown threshold. Its specified test current of 50 µA enables ultra-low standby power operation, while intentional minor leakage rise improves switching speed and noise immunity per AN90031.
The BZX38450-C47F exhibits 375 Ω differential resistance at 0.5 mA Zener current and 170 Ω at 2 mA, with a positive temperature coefficient of +0.05 mV/K and junction-to-ambient thermal resistance of 415 K/W on FR4 PCB - enabling predictable thermal derating in compact layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 47 V at IZ = 50 µA - defines precise regulation point for low-bias reference circuits |
| Tolerance | ±5 % - supports cost-sensitive designs where tighter tolerance is not required |
| Differential Resistance | 375 Ω at IZ = 0.5 mA - determines output impedance and load regulation error |
| Forward Voltage | 0.9 V at IF = 10 mA - sets minimum forward bias headroom in dual-direction protection schemes |
| Total Power Dissipation | 300 mW at Tamb ≤ 25 °C - limits continuous Zener current to ~6.4 mA at 47 V |
| Junction-to-Ambient Rth | 415 K/W - requires thermal-aware PCB layout for >100 mW operation |
| Reverse Leakage | <0.05 µA at VR = 37.6 V - ensures sub-nA standby current in battery-critical applications |
Pinout & Package
SOD323 (SC-76) surface-mount plastic package: 1.7 mm × 1.25 mm × 0.95 mm body, 1.3 mm lead pitch, cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K) | Cathode | Connected to regulated voltage node; marking bar identifies this terminal |
| 2 (A) | Anode | Connected to ground or lower-potential rail; reverse-biased during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables use in nanoampere-bias circuits without compromising regulation accuracy |
| Optimized leakage profile | Intentional minor rise per AN90031 - reduces switching transients and high-frequency noise in sensing front-ends |
| Thermal performance | Rth(j-a) = 415 K/W - allows direct thermal modeling on standard FR4 with single-sided copper |
| Small-footprint packaging | SOD323 outline - saves board space in wearables and IoT edge nodes with strict area constraints |
Applications
| Portable Sensor Biasing | Microcontroller Reset Reference |
|---|---|
Use Scenario: Providing stable 47 V bias to MEMS pressure sensor bridge in battery-operated environmental monitor. IC Role / Device Role / Timing Role: Shunt voltage reference regulating sensor excitation voltage against battery discharge drift. Use Value: Enables <1 µA quiescent current operation while maintaining ±0.5 % full-scale accuracy over −40 °C to +85 °C. |
Use Scenario: Generating precise 47 V threshold for external reset supervisor IC monitoring 48 V industrial bus voltage. IC Role / Device Role / Timing Role: Zener reference input to reset comparator with hysteresis control. Use Value: Delivers 47 V ±2.35 V tolerance window, ensuring reliable brown-out detection without false triggers. |
| Low-Power ADC Reference | ESD-Protected Signal Clamping |
Use Scenario: Supplying reference voltage to 16-bit SAR ADC in solar-powered data logger. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage reference source for analog front-end scaling. Use Value: 0.05 mV/K tempco and 375 Ω dynamic impedance limit gain error to <0.02 % over operating range. |
Use Scenario: Clamping CAN FD transceiver I/O lines to 47 V during load-dump transients in automotive telematics module. IC Role / Device Role / Timing Role: Secondary overvoltage clamp protecting primary TVS with faster response than bulk devices. Use Value: 0.05 µA leakage at 37.6 V prevents signal distortion while clamping 40 W surges per IEC 61000-4-5. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX38450-B47 | ±2 % tolerance vs. ±5 %; identical 47 V nominal, same SOD323 package and thermal specs | Higher precision required in calibration-critical instrumentation, not portable low-power systems | Select when absolute voltage accuracy outweighs cost sensitivity and leakage optimization is secondary |
| MMSZ5270B | 47 V ±5 %, but 500 mW Ptot, 1000 Ω rdiff at 20 mA, no optimized leakage profile | Used in higher-current linear regulators where thermal margin > low-IQ priority | Choose only if board layout allows larger SOD-123 footprint and system tolerates higher dynamic impedance |
Compared with BZX38450-B47, the C47F trades tighter tolerance for lower leakage and better noise performance; versus MMSZ5270B, it offers superior low-current regulation stability and smaller footprint but lower power handling - making it optimal for space-constrained, battery-limited designs demanding clean reference behavior.
Availability
BZX38450-C47F is available at Aetrix Electronics and suitable for portable sensor biasing, microcontroller reset reference, low-power ADC reference, and ESD-protected signal clamping requiring stable component supply under extended temperature and low-IQ conditions.
Supply support for BZX38450-C47F 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 logic, discrete, and MOSFET solutions with focus on efficiency, reliability, and miniaturization for consumer, industrial, and automotive markets.
The BZX38450 series belongs to Nexperia's low-current Zener regulator portfolio, engineered specifically for ultra-low-test-current voltage referencing in battery-powered and energy-harvesting systems where leakage, noise, and footprint are critical.
FAQ
What is the maximum reverse current at 37.6 V for BZX38450-C47F?
The maximum reverse current (leakage) at VR = 37.6 V is 0.05 µA, measured at Tj = 25 °C. This ultra-low value ensures minimal loading on high-impedance sensor bias networks and preserves battery life in always-on monitoring applications.
Can BZX38450-C47F be used in place of a 47 V Zener with 10 mA test current?
No - BZX38450-C47F is characterized at 50 µA, not 10 mA. Its differential resistance rises significantly below 0.5 mA, so using it in high-current regulation will cause excessive voltage deviation. It is intended for reference/bias roles, not power regulation.
Does the "C" suffix indicate automotive qualification?
No - the "C" denotes ±5 % tolerance within the BZX38450 series. This part is not AEC-Q200 qualified. Nexperia explicitly states non-automotive qualification applies unless otherwise declared in the datasheet, and no automotive compliance is cited for BZX38450-C47F.
How does the intentional leakage rise improve noise performance?
Per AN90031, the controlled increase in leakage current reduces carrier trapping effects in the depletion region, lowering 1/f noise and improving transient response during fast voltage transitions - critical for precision analog front-ends in wireless sensor nodes.
BZX38450-C47F 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX38450-C47F FAQ
1.How can I place an order for BZX38450-C47F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-C47F 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-C47F reliable?
The price and inventory of BZX38450-C47F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX38450-C47F is usually 5 days.
3.What payment methods are accepted for BZX38450-C47F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-C47F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-C47F?
BZX38450-C47F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-C47F 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-C47F?
For technical support, including BZX38450-C47F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-C47F requirements.
6.How does Aetrix verify that BZX38450-C47F is sourced from the original manufacturer or authorized distributors?
All BZX38450-C47F 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-C47F meets industry standards.
7.What is the process for return or replacement of BZX38450-C47F?
All BZX38450-C47F units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-C47F, 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-C47F part is unused and in its original packaging.
Return procedure for BZX38450-C47F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-C47F Tags
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