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Nexperia USA Inc. BZX38450-C5V1F
- Part No.:
- BZX38450-C5V1F
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-C5V1F.pdf
- Description:
- DIODE ZENER 5.1V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:18,940
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Product details
Overview
BZX38450-C5V1F 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 5.1 V regulation at 50 µA test current, with ±2 % tolerance, 500 Ω differential resistance at 5 mA, and −2.0 mV/K temperature coefficient - enabling stable operation in battery-powered sensor nodes and portable instrumentation.
For engineers reviewing the BZX38450-C5V1F datasheet, BZX38450-C5V1F pinout, BZX38450-C5V1F application, or BZX38450-C5V1F equivalent, key selection criteria include low-test-current regulation accuracy, thermal stability in compact layouts, SOD323 footprint compatibility, and leakage performance under sub-10 µA bias conditions.
Technical Context
This Zener diode operates in reverse breakdown mode with specified regulation at IZ = 50 µA - optimized for minimal quiescent current draw in always-on monitoring circuits. Its −2.0 mV/K temperature coefficient ensures predictable drift across −55 °C to +150 °C ambient range, critical for unregulated supply rail stabilization.
The device exhibits 130 pF junction capacitance at 0 V and <3.0 µA reverse current at VR = 4.0 V, supporting noise-sensitive analog front-ends. Its 300 mW total power dissipation rating applies to FR4 PCB mounting with single-sided copper, limiting maximum continuous Zener current to ~59 mA at 5.1 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 5.1 V at IZ = 50 µA - enables accurate low-bias voltage reference without loading weak sources |
| Tolerance | ±2 % - supports tight regulation in precision ADC reference or comparator threshold circuits |
| Differential Resistance | 500 Ω at IZ = 5 mA - defines output impedance under small-signal AC load variations |
| Temperature Coefficient | −2.0 mV/K - quantifies voltage drift per degree Celsius, critical for thermal stability in unheated enclosures |
| Forward Voltage | ≤ 0.9 V at IF = 10 mA - ensures low loss when used bidirectionally or as clamp in protection schemes |
| Junction Capacitance | 130 pF at VR = 0 V, f = 1 MHz - impacts high-frequency noise coupling in RF-adjacent signal chains |
| Max Power Dissipation | 300 mW at Tamb ≤ 25 °C on FR4 - sets absolute thermal limit for continuous DC operation |
| Reverse Leakage | ≤ 3.0 µA at VR = 4.0 V - determines minimum bias current required to maintain regulation margin |
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 | 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-biased configuration establishes Zener breakdown |
Key Features
| Feature | Design Value |
|---|---|
| Low test current regulation | Specified at 50 µA - reduces standby power in energy-harvesting and coin-cell applications |
| Controlled temperature coefficient | −2.0 mV/K - enables predictable compensation in temperature-varying environments without external circuitry |
| Optimized leakage profile | ≤3.0 µA at 4.0 V reverse - maintains regulation integrity during deep sleep modes of microcontrollers |
| Compact SMD footprint | SOD323 package - saves board space in wearables and IoT edge sensors where area is constrained |
| Robust thermal rating | 150 °C max junction temperature - supports operation in sealed industrial enclosures without forced cooling |
Applications
| Portable Gas Sensor Calibration | IoT Node Reference Voltage |
|---|---|
Use Scenario: Battery-powered electrochemical gas sensor requiring stable 5.1 V reference for analog front-end amplification and ADC conversion over −20 °C to +60 °C. IC Role / Device Role / Timing Role: Zener voltage reference diode providing fixed bias point for op-amp gain stages and sensor excitation circuitry. Use Value: ±2 % tolerance and −2.0 mV/K TC ensure <±15 mV total drift across operating range, eliminating need for digital calibration. |
Use Scenario: Sub-GHz wireless sensor node powered by CR2032 coin cell, operating in low-duty-cycle sleep mode with periodic wake-up for measurement. IC Role / Device Role / Timing Role: Low-current Zener regulator establishing clean 5.1 V rail for MCU VREF and RF transceiver bias during active bursts. Use Value: 50 µA test current and ≤3.0 µA leakage at 4.0 V minimize quiescent drain, extending battery life beyond 5 years. |
| Medical Patch Monitor Bias | Industrial PLC Input Protection |
Use Scenario: Disposable wearable ECG patch with ASIC-based signal conditioning, requiring ultra-low-power, biocompatible voltage reference. IC Role / Device Role / Timing Role: Precision Zener diode supplying stable reference to instrumentation amplifier and SAR ADC within analog signal chain. Use Value: 130 pF junction capacitance and low noise profile prevent coupling of switching artifacts into microvolt-level bio-signals. |
Use Scenario: 24 V DC input module in programmable logic controller, protecting downstream logic from transient overvoltage events. IC Role / Device Role / Timing Role: Clamp diode placed across input filter capacitor to limit surge-induced rail excursion during field wiring faults. Use Value: 300 mW power rating and 40 W non-repetitive peak dissipation handle 100 µs surges without degradation in harsh factory environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5231B | 5.1 V ±5 %, 1000 Ω rdiff at 20 mA, −2.5 mV/K TC | Higher test current (20 mA) increases standby power; wider tolerance reduces reference accuracy | Acceptable where cost sensitivity outweighs precision and ultra-low-IQ requirements |
| Vishay BZX384-B5V1 | Identical 5.1 V ±2 %, but 600 Ω rdiff at 5 mA and −2.5 mV/K TC | Slightly higher dynamic impedance and thermal drift reduce regulation fidelity in wide-temperature deployments | Valid drop-in for legacy designs where minor TC/rdiff trade-off is acceptable |
Compared with MMBZ5231B and BZX384-B5V1, BZX38450-C5V1F offers superior low-current regulation fidelity, tighter TC control, and lower leakage - making it optimal for battery-constrained, high-accuracy analog systems rather than general-purpose clamping.
Availability
BZX38450-C5V1F is available at Aetrix Electronics and suitable for portable medical devices, industrial sensor nodes, and low-power IoT gateways requiring stable component supply with guaranteed long-term continuity.
Supply support for BZX38450-C5V1F 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 and industrial-grade components.
The BZX38450 series belongs to Nexperia's precision Zener portfolio, engineered specifically for low-quiescent-current voltage reference and biasing in space- and energy-constrained applications.
FAQ
What is the maximum continuous reverse current for reliable regulation at 5.1 V?
The BZX38450-C5V1F supports up to 59 mA continuous Zener current at 5.1 V under 25 °C ambient on standard FR4 PCB, derived from its 300 mW power rating. Exceeding this requires derating per Rth(j-a) = 415 K/W, and operation above 150 °C junction temperature causes permanent degradation.
Can this diode be used in forward conduction mode as a low-VF clamp?
Yes - its forward voltage is guaranteed ≤0.9 V at 10 mA, making it suitable as a low-threshold clamp in bidirectional protection circuits. However, its primary design intent and characterization are for reverse-bias Zener operation; forward-mode reliability data (e.g., surge handling) is not specified in the datasheet.
How does the "C" suffix differ from "B" in the BZX38450 series?
The "C" suffix denotes ±2 % voltage tolerance and intentional minor leakage current optimization for fast switching and noise reduction (per AN90031), whereas "B" parts offer ±5 % tolerance and standard leakage. For BZX38450-C5V1F, this means tighter regulation and improved transient response in reference applications.
Is the SOD323 package compatible with standard reflow profiles for lead-free assembly?
Yes - Nexperia specifies full compatibility with JEDEC J-STD-020D reflow profiles for lead-free soldering. The recommended footprint (Fig. 10) uses 0.5 mm × 0.6 mm solder lands with 0.6 mm solder resist opening, and thermal validation confirms no delamination or voiding under standard peak temperatures of 260 °C.
BZX38450-C5V1F 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):
- 5.1 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 60 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-C5V1F FAQ
1.How can I place an order for BZX38450-C5V1F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-C5V1F 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-C5V1F reliable?
The price and inventory of BZX38450-C5V1F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX38450-C5V1F is usually 5 days.
3.What payment methods are accepted for BZX38450-C5V1F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-C5V1F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-C5V1F?
BZX38450-C5V1F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-C5V1F 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-C5V1F?
For technical support, including BZX38450-C5V1F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-C5V1F requirements.
6.How does Aetrix verify that BZX38450-C5V1F is sourced from the original manufacturer or authorized distributors?
All BZX38450-C5V1F 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-C5V1F meets industry standards.
7.What is the process for return or replacement of BZX38450-C5V1F?
All BZX38450-C5V1F units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-C5V1F, 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-C5V1F part is unused and in its original packaging.
Return procedure for BZX38450-C5V1F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-C5V1F 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
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
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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