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Nexperia USA Inc. BZX38450-C4V7F
- Part No.:
- BZX38450-C4V7F
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-C4V7F.pdf
- Description:
- DIODE ZENER 4.7V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:17,408
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Product details
Overview
BZX38450-C4V7F from Nexperia is a low-current Zener voltage regulator diode in SOD323 (SC-76) package, designed for precision biasing and voltage reference in ultra-low-power circuits. It delivers a nominal 4.7 V regulation at 50 µA test current, with ±2 % tolerance, 600 Ω dynamic resistance at 5 mA, and 300 mW total power dissipation - optimized for portable battery-powered sensors and microcontroller reset circuits.
For engineers reviewing the BZX38450-C4V7F datasheet, BZX38450-C4V7F pinout, BZX38450-C4V7F application, or BZX38450-C4V7F equivalent, key selection criteria include its low 50 µA regulation current, tight ±2 % tolerance, SOD323 footprint compatibility, and specified thermal resistance of 110 K/W to solder point - critical for thermally constrained wearables and IoT edge nodes.
Technical Context
This Zener diode operates in reverse breakdown mode with a nominal 4.7 V working voltage (VZ) at IZ = 50 µA, exhibiting a temperature coefficient of −2.7 mV/K and differential resistance of 600 Ω at 5 mA. Its low leakage current (<3 µA at 3.0 V reverse) and 140 pF capacitance at 0 V support stable DC reference generation without high-frequency coupling.
The device uses silicon planar epitaxial construction and is rated for junction temperatures up to 150 °C. Its thermal resistance from junction to solder point is 110 K/W, enabling reliable operation on FR4 PCBs with minimal copper area - essential for space-constrained consumer electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VZ @ 50 µA | 4.47 V to 4.94 V - defines precise DC reference voltage under ultra-low bias conditions |
| Tolerance | ±2 % - ensures consistent voltage accuracy across production batches for calibration-critical designs |
| rdiff @ 5 mA | 600 Ω - limits output impedance drift under load variation in feedback networks |
| Ptot | 300 mW - sets maximum continuous power handling on standard FR4 PCB with single-sided copper |
| Rth(j-sp) | 110 K/W - determines thermal rise above solder point temperature during steady-state operation |
| Cd @ 0 V, 1 MHz | 140 pF - constrains high-frequency noise coupling into reference rails in mixed-signal systems |
| IR @ 3.0 V | <3 µA - enables use in nanoampere-bias circuits such as battery voltage monitors |
Pinout & Package
Package: SOD323 (SC-76), surface-mounted plastic package; 2 leads; 1.3 mm pitch; 1.7 mm × 1.25 mm × 0.95 mm body. Cathode identified by marking bar.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated voltage node; polarity-sensitive terminal requiring correct PCB orientation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; forms reverse-biased junction for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables stable regulation in battery-powered systems where quiescent current must remain below 100 µA |
| Tight voltage tolerance | ±2 % (C-series) - reduces need for post-production trimming in precision analog front-ends |
| Optimized leakage profile | Controlled IR rise per AN90031 - improves switching speed and reduces broadband noise in reference buffers |
| Thermally efficient packaging | Rth(j-sp) = 110 K/W - allows >200 mW derated power handling on minimal PCB copper area |
| Small-footprint SMD | SOD323 outline (1.7 × 1.25 mm) - supports high-density layouts in compact wearables and medical patches |
Applications
| Microcontroller Reset Circuit | Portable Sensor Biasing |
|---|---|
|
Use Scenario: Providing clean, stable 4.7 V reference to enable/disable reset logic in ultra-low-power MCUs during brown-out detection. IC Role / Device Role / Timing Role: Zener diode acting as precision shunt voltage reference in RC-based reset generator network. Use Value: Enables reliable reset assertion down to 1.8 V supply with <3 µA leakage, extending battery life in coin-cell-powered devices. |
Use Scenario: Supplying regulated bias voltage to MEMS pressure sensor signal conditioning circuitry in wearable health monitors. IC Role / Device Role / Timing Role: Shunt regulator establishing fixed reference for op-amp gain-setting resistors and ADC reference divider. Use Value: Maintains <±0.1 % reference stability over −40 °C to +85 °C due to −2.7 mV/K tempco and low rdiff. |
| USB-C Power Negotiation Reference | IoT Node Voltage Monitoring |
|
Use Scenario: Generating accurate 4.7 V threshold for USB PD CC line voltage detection in embedded host controllers. IC Role / Device Role / Timing Role: Precision Zener defining comparator trip point in CC voltage sensing path. Use Value: ±2 % tolerance eliminates need for external trimming resistors, reducing BOM count and layout area. |
Use Scenario: Monitoring lithium coin cell voltage decay in Bluetooth LE beacons using resistor-divider + ADC architecture. IC Role / Device Role / Timing Role: Low-leakage Zener providing stable reference against which battery voltage is ratio-metrically measured. Use Value: Sub-3 µA reverse current at 3.0 V ensures measurement accuracy remains unaffected by reference loading error. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B4V7 | ±5 % tolerance, higher rdiff (800 Ω), same SOD323 package | Acceptable where cost sensitivity outweighs voltage accuracy requirements | Select when ±5 % regulation is sufficient and budget constraints dominate design trade-offs |
| MMSZ4704T1G | ±5 % tolerance, 500 mW Ptot, SOD-123 package (larger footprint) | Higher power margin but incompatible with dense SOD323 layouts | Choose only if thermal headroom >300 mW is required and board space permits larger package |
Compared with BZX38450-C4V7F, the BZX384-B4V7 sacrifices accuracy for cost, while MMSZ4704T1G trades miniaturization for thermal robustness - making the C4V7F optimal for space- and precision-constrained battery-operated systems.
Availability
BZX38450-C4V7F is available at Aetrix Electronics and suitable for microcontroller reset circuits, portable sensor biasing, USB-C power negotiation references, and IoT node voltage monitoring requiring stable component supply across high-mix, low-volume production runs.
Supply support for BZX38450-C4V7F 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 leading global semiconductor manufacturer specializing in high-performance, energy-efficient logic, discrete, and MOSFET components, headquartered in Nijmegen, Netherlands.
The BZX38450 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for ultra-low-power voltage reference and biasing in battery-operated and space-constrained electronics.
FAQ
What is the maximum reverse voltage this diode can withstand before breakdown?
The BZX38450-C4V7F has a nominal Zener voltage of 4.7 V at 50 µA, with guaranteed breakdown occurring between 4.47 V and 4.94 V. Its absolute maximum non-repetitive peak reverse voltage is not specified independently - instead, it is limited by the 40 W surge rating at 100 µs pulse width and the 300 mW continuous power dissipation limit at 25 °C ambient.
Can this Zener diode be used in forward conduction mode like a standard diode?
Yes - the BZX38450-C4V7F exhibits a typical forward voltage of 0.9 V at 10 mA, matching standard silicon diode behavior. However, its primary design purpose is reverse-bias Zener regulation; forward conduction is characterized only for ESD protection and parasitic path analysis, not for rectification duty.
How does the −2.7 mV/K temperature coefficient affect long-term reference stability?
A −2.7 mV/K coefficient means the Zener voltage decreases by 2.7 mV per degree Celsius rise in junction temperature. Over a 100 °C range (−40 °C to +60 °C), this introduces ~270 mV drift - mitigated in practice by low power dissipation (limiting self-heating) and system-level compensation in precision applications.
Is this part suitable for automotive applications?
No - the BZX38450-C4V7F is not AEC-Q200 qualified and lacks automotive-grade screening, extended temperature validation, or PPAP documentation. Nexperia explicitly states non-automotive qualification in its legal disclaimers; use in automotive systems requires formal qualification and is at the customer's sole risk.
BZX38450-C4V7F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX38450
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 4.7 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 3 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-C4V7F FAQ
1.How can I place an order for BZX38450-C4V7F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-C4V7F 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-C4V7F reliable?
The price and inventory of BZX38450-C4V7F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX38450-C4V7F is usually 5 days.
3.What payment methods are accepted for BZX38450-C4V7F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-C4V7F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-C4V7F?
BZX38450-C4V7F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-C4V7F 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-C4V7F?
For technical support, including BZX38450-C4V7F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-C4V7F requirements.
6.How does Aetrix verify that BZX38450-C4V7F is sourced from the original manufacturer or authorized distributors?
All BZX38450-C4V7F 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-C4V7F meets industry standards.
7.What is the process for return or replacement of BZX38450-C4V7F?
All BZX38450-C4V7F units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-C4V7F, 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-C4V7F part is unused and in its original packaging.
Return procedure for BZX38450-C4V7F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-C4V7F Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
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
-
SMAZ12-13-F
Diodes Incorporated
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