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Nexperia USA Inc. BZX38450-C11F
- Part No.:
- BZX38450-C11F
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-C11F.pdf
- Description:
- DIODE ZENER 11V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:5,555
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Product details
Overview
BZX38450-C11F 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 11 V regulation at 50 µA test current, with ±2 % tolerance, 150 Ω typical differential resistance at 5 mA, and 0.05 µA max reverse leakage at rated voltage - ideal for battery-powered sensor nodes and portable IoT devices.
For engineers reviewing the BZX38450-C11F datasheet, BZX38450-C11F pinout, BZX38450-C11F application, or BZX38450-C11F equivalent, key selection criteria include its 11 V nominal Zener voltage, low 50 µA test current requirement, ±2 % tolerance grade, SOD323 surface-mount footprint, and optimized leakage profile for noise-sensitive analog front-ends.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage under varying load and temperature conditions. Its specified 11 V nominal Zener voltage is guaranteed at IZ = 50 µA, with differential resistance of ≤150 Ω at 5 mA and temperature coefficient of +5.4 mV/K - enabling predictable drift compensation in reference designs.
The device features intentional minor leakage current elevation per AN90031 to improve switching speed and reduce high-frequency noise. Thermal resistance from junction to ambient is 415 K/W on standard FR4 PCB, supporting reliable operation up to 150 °C junction temperature with ≤300 mW total power dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 10.45 V to 11.55 V at IZ = 50 µA - tight ±2 % tolerance enables accurate low-current voltage referencing |
| Differential Resistance rdiff | ≤150 Ω at IZ = 5 mA - ensures minimal output voltage variation under small load changes |
| Reverse Leakage IR | ≤0.05 µA at VR = 8.4 V - ultra-low standby current preserves battery life in always-on systems |
| Forward Voltage VF | ≤0.9 V at IF = 10 mA - supports efficient forward-bias use in clamping or protection circuits |
| Power Dissipation Ptot | 300 mW at Tamb ≤ 25 °C - defines maximum continuous DC power handling on standard PCB layout |
| Thermal Resistance Rth(j-a) | 415 K/W - determines junction temperature rise above ambient under steady-state bias |
| Capacitance Cd | 85 pF at VR = 0 V, f = 1 MHz - impacts high-frequency noise filtering and stability in feedback paths |
Pinout & Package
SOD323 (SC-76) plastic surface-mount 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 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal for correct PCB orientation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; reverse-bias polarity must be observed for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables stable regulation in microamp-level bias networks without loading sensitive sources |
| Tight voltage tolerance | ±2 % (C-series) - reduces calibration overhead in precision analog signal chains and ADC references |
| Optimized leakage profile | Intentionally elevated IR per AN90031 - improves transient response and suppresses broadband noise in LDO feedback paths |
| Miniature SMD package | SOD323 footprint - supports high-density layouts in space-constrained wearables and medical sensors |
Applications
| Portable Sensor Biasing | Low-Power ADC Reference |
|---|---|
|
Use Scenario: Providing stable excitation voltage to MEMS pressure sensors in battery-operated environmental monitors. IC Role / Device Role / Timing Role: Zener voltage reference diode operating in reverse breakdown to deliver fixed 11 V bias independent of supply variation. Use Value: Enables <1 µA quiescent current in sensor interface while maintaining ±0.22 V regulation accuracy across −40 °C to +85 °C. |
Use Scenario: Supplying reference voltage to 12-bit SAR ADCs in handheld diagnostic tools. IC Role / Device Role / Timing Role: Precision shunt reference establishing VREF for analog-to-digital conversion. Use Value: Delivers 11 V reference with <150 Ω dynamic impedance, minimizing code-dependent errors and improving ENOB by ≥0.8 bits. |
| IoT Node Power Management | Signal Clamping Interface |
|
Use Scenario: Regulating auxiliary rail for RF transceiver bias in NB-IoT modules. IC Role / Device Role / Timing Role: Low-current Zener regulator stabilizing 11 V supply for PA driver stages. Use Value: Maintains regulation under pulsed 250 µA load transients while consuming only 50 µA static current - extending coin-cell lifetime by >30 %. |
Use Scenario: Protecting GPIO inputs of microcontrollers against ESD-induced overvoltage in industrial gateways. IC Role / Device Role / Timing Role: Bidirectional clamping device using forward conduction (anode-cathode) and reverse Zener action. Use Value: Limits input swing to 0.9 V forward / 11.55 V reverse with <85 pF capacitance - preserving signal integrity up to 10 MHz. |
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-B11 | Same 11 V nominal voltage but ±5 % tolerance (B-series), higher 200 Ω rdiff, 0.1 µA max IR at 8.4 V | Acceptable where cost sensitivity outweighs precision; less suitable for high-resolution ADC references | Select when budget constraints dominate and ±5 % regulation error is acceptable in non-critical biasing |
| MMSZ5240B | 10 V nominal, ±5 %, SOD-123 package (2.7 × 1.6 mm), 150 mW Ptot, 17 Ω rdiff at 20 mA | Better regulation at higher currents but incompatible 10 V rating and larger footprint | Choose only if system requires 10 V reference and board layout allows SOD-123 spacing; not a drop-in replacement |
Compared with BZX38450-C11F, BZX384-B11 trades precision for cost and MMSZ5240B offers lower impedance at higher current but mismatches both voltage and package - making the C11F uniquely suited for compact, low-leakage 11 V reference designs.
Availability
BZX38450-C11F is available at Aetrix Electronics and suitable for portable sensor biasing, low-power ADC reference, IoT node power management, and signal clamping interface applications requiring stable component supply and long-term production continuity.
Supply support for BZX38450-C11F 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, reliable discrete, logic, and MOSFET devices with focus on efficiency and miniaturization.
The BZX38450 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for ultra-low-power voltage referencing in battery-constrained and noise-sensitive applications.
FAQ
What is the maximum continuous reverse power dissipation for BZX38450-C11F?
The maximum continuous total power dissipation is 300 mW at ambient temperature ≤25 °C on a standard FR4 PCB with single-sided copper. Derating is required above 25 °C at 2.4 mW/°C based on 415 K/W thermal resistance, and absolute maximum junction temperature is limited to 150 °C.
How does the "C" suffix differ from "B" in the BZX38450 series?
The "C" suffix denotes ±2 % Zener voltage tolerance (e.g., 10.45–11.55 V for 11 V nominal), while "B" indicates ±5 % (10.45–11.55 V becomes 10.45–11.55 V for B11, but wider spread applies across other voltages). C-grade also features tighter differential resistance and lower leakage, per datasheet Tables 8 and 9.
Can BZX38450-C11F be used in forward conduction mode?
Yes - it exhibits ≤0.9 V forward voltage at 10 mA, making it suitable for low-voltage clamping or polarity protection. However, its primary design intent and characterization are for reverse-bias Zener regulation; forward characteristics are secondary and not optimized for high-current switching.
Is the SOD323 package compatible with standard reflow soldering profiles?
Yes - Nexperia specifies compatibility with JEDEC J-STD-020D reflow profiles. The recommended footprint (Fig. 10) uses 0.5 mm solder lands with 0.6 mm solder resist openings, and peak temperature must not exceed 260 °C for ≤10 seconds to avoid package damage or parametric shift.
BZX38450-C11F 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):
- 11 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 20 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 8.4 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-C11F FAQ
1.How can I place an order for BZX38450-C11F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-C11F 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-C11F reliable?
The price and inventory of BZX38450-C11F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX38450-C11F is usually 5 days.
3.What payment methods are accepted for BZX38450-C11F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-C11F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-C11F?
BZX38450-C11F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-C11F 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-C11F?
For technical support, including BZX38450-C11F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-C11F requirements.
6.How does Aetrix verify that BZX38450-C11F is sourced from the original manufacturer or authorized distributors?
All BZX38450-C11F 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-C11F meets industry standards.
7.What is the process for return or replacement of BZX38450-C11F?
All BZX38450-C11F units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-C11F, 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-C11F part is unused and in its original packaging.
Return procedure for BZX38450-C11F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-C11F Tags
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MMBZ5240B-7-F
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BZT52C5V6T-7
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MMSZ5231B-7-F
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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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