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Nexperia USA Inc. BZX38450-B5V6X
- Part No.:
- BZX38450-B5V6X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-B5V6X.pdf
- Description:
- DIODE ZENER 5.6V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:7,108
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Product details
Overview
BZX38450-B5V6X from Nexperia is a low-current Zener voltage regulator diode in SOD323 (SC-76) package, designed for precision voltage reference and low-power biasing in portable electronics. It delivers a nominal 5.6 V regulation at 50 µA test current, with ±2 % tolerance, 400 Ω differential resistance at 5 mA, and 2.0 µA reverse current at 5 V, enabling stable operation in battery-powered sensor nodes and microcontroller reset circuits.
For engineers reviewing the BZX38450-B5V6X datasheet, BZX38450-B5V6X pinout, BZX38450-B5V6X application, or BZX38450-B5V6X equivalent, key selection criteria include its 5.6 V nominal Zener voltage, ±2 % tolerance, 300 mW power dissipation limit, low 50 µA test current requirement, and SOD323 surface-mount footprint compatibility with space-constrained PCB layouts.
Technical Context
This Zener diode operates in reverse breakdown to maintain a stable reference voltage across varying load and supply conditions. Its specified 5.6 V nominal Zener voltage is guaranteed at IZ = 50 µA, with differential resistance of 400 Ω at IZ = 5 mA and temperature coefficient of −2.0 mV/K - indicating predictable, low-drift behavior over ambient temperature changes.
The device features intentional leakage current optimization per AN90031 for fast switching and noise reduction, and is rated for 150 °C junction temperature with thermal resistance Rth(j-a) = 415 K/W on FR4 PCB - confirming suitability for thermally constrained, low-bias applications where self-heating must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.49 V to 5.71 V at IZ = 50 µA - ensures tight 5.6 V reference under ultra-low bias conditions typical in sleep-mode circuits. |
| Tolerance | ±2 % - enables accurate voltage threshold setting for reset generators and ADC references without trimming. |
| Differential Resistance (rdiff) | 400 Ω at IZ = 5 mA - limits output impedance drift under small-signal load variations, preserving regulation stability. |
| Reverse Current (IR) | 2.0 µA at VR = 5 V - minimizes quiescent power draw in always-on monitoring functions. |
| Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C - defines maximum continuous DC power handling on standard FR4 PCB with single-sided copper. |
| Forward Voltage (VF) | 0.9 V at IF = 10 mA - supports use as low-drop rectifier or clamping diode in auxiliary signal paths. |
| Junction Temperature (Tj) | −55 °C to +150 °C - validates operation across industrial and extended commercial temperature ranges. |
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 (K) | Cathode | Connected to regulated output node; marking bar identifies this terminal - critical for correct polarity during automated placement and circuit biasing. |
| 2 (A) | Anode | Connected to ground or lower-potential rail; forms reverse-biased junction enabling Zener breakdown conduction at 5.6 V. |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - reduces standby current in battery-powered systems while maintaining regulation accuracy. |
| Optimized leakage profile | Intentional minor rise per AN90031 - improves transient response and suppresses high-frequency noise in reference paths. |
| Tight voltage tolerance | ±2 % B-series grading - eliminates need for external trimming in precision analog front-ends and voltage monitors. |
| Thermally robust SMD package | Rth(j-sp) = 110 K/W to cathode solder point - enables reliable heat transfer in dense layouts without thermal vias. |
| Wide working voltage range | 1.8 V to 51 V coverage across series - allows design reuse of SOD323 footprint across multiple voltage rails in same product family. |
Applications
| Microcontroller Reset Circuit | Portable Sensor Bias Reference |
|---|---|
Use Scenario: Provides clean, stable 5.6 V threshold for brown-out detection in ARM Cortex-M0+ MCUs operating from Li-ion batteries. IC Role / Device Role / Timing Role: Zener diode acts as precision voltage comparator input reference, triggering reset when supply drops below 5.6 V × (1 − tolerance). Use Value: ±2 % tolerance ensures deterministic reset voltage across temperature, eliminating false resets during battery discharge curves. |
Use Scenario: Supplies regulated bias to MEMS accelerometer analog front-end in wearable health monitors. IC Role / Device Role / Timing Role: Functions as low-quiescent current voltage reference for op-amp gain-setting and ADC reference divider networks. Use Value: 2.0 µA reverse current at 5 V minimizes battery drain in multi-year deployments, extending operational life. |
| USB-C Power Negotiation Clamp | IoT Node Voltage Monitor |
Use Scenario: Clamps CC line voltage during USB-C PD communication to prevent overvoltage damage to controller GPIOs. IC Role / Device Role / Timing Role: Zener diode placed between CC pin and ground, conducting above 5.6 V to shunt transient surges. Use Value: 400 Ω differential resistance ensures rapid clamp activation with minimal overshoot during 100 ns ESD events. |
Use Scenario: Monitors 12 V rail in LPWAN gateway using resistive divider into MCU ADC, with Zener stabilizing divider top node. IC Role / Device Role / Timing Role: Acts as shunt regulator for high-impedance divider node, rejecting supply ripple and improving ADC measurement SNR. Use Value: −2.0 mV/K temperature coefficient enables <10 mV total drift over −40 °C to +85 °C, meeting Class 1 accuracy requirements. |
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-C5V6 | ±5 % tolerance, higher 7.5 µA reverse current at 5 V, 350 Ω rdiff at 5 mA | Acceptable where cost sensitivity outweighs precision; less suitable for low-leakage sensor bias | Select for cost-driven consumer products where ±5 % regulation is sufficient and 5 µA leakage is tolerable. |
| MMSZ5232B | Same 5.6 V nominal, ±5 % tolerance, 500 mW Ptot, SOD-123 package (2.7 mm × 1.6 mm) | Larger footprint; higher power rating but incompatible with ultra-dense SOD323 layouts | Choose only if board space permits larger package and higher 500 mW dissipation is required for pulsed loads. |
Compared with BZX38450-B5V6X, the BZX384-C5V6 trades precision and leakage performance for lower unit cost, while MMSZ5232B offers higher power handling at the expense of PCB area - making the BZX38450-B5V6X optimal for miniaturized, battery-sensitive designs demanding ±2 % accuracy and sub-3 µA leakage.
Availability
BZX38450-B5V6X is available at Aetrix Electronics and suitable for portable sensor biasing, microcontroller reset generation, USB-C line clamping, and IoT node voltage monitoring requiring stable component supply across production lifecycles.
Supply support for BZX38450-B5V6X 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 low-current Zener regulator portfolio, engineered specifically for ultra-low-power voltage reference and biasing in space-constrained, battery-operated electronics.
FAQ
What is the maximum continuous reverse voltage that BZX38450-B5V6X can regulate without degradation?
The device is rated for continuous Zener operation up to its nominal 5.6 V (min 5.49 V, max 5.71 V) at IZ = 50 µA. Exceeding 5.71 V under sustained bias risks exceeding the 300 mW power limit on standard FR4 PCB, potentially causing thermal runaway. Absolute maximum reverse voltage is not defined - operation must remain within the specified VZ band and Ptot derating curve.
Can BZX38450-B5V6X be used in forward-biased applications such as signal clamping or protection?
Yes - its forward voltage is specified at 0.9 V @ 10 mA, and it supports up to 250 mA forward current. It is commonly used as a low-VF clamp in analog signal chains or as a polarity protection diode in low-voltage rails, leveraging its small SOD323 footprint and consistent forward conduction characteristics.
How does the −2.0 mV/K temperature coefficient affect long-term voltage reference stability?
Over a −40 °C to +85 °C ambient range, the coefficient causes approximately 250 mV total drift (125 K × 2.0 mV/K), resulting in a VZ shift from ~5.45 V to ~5.70 V. For high-stability applications, this drift is mitigated by pairing with temperature-compensated circuits or selecting tighter-tolerance units; the value is confirmed in Table 8 for B-series 5.6 V devices.
Is BZX38450-B5V6X suitable for automotive applications?
No - this part is not AEC-Q200 qualified and lacks automotive-specific testing or qualification. Nexperia explicitly states in its legal disclaimers that non-automotive qualified products like BZX38450-B5V6X are unsuitable for safety-critical or life-support systems. Automotive designs require verified AEC-Q200 Zeners such as PZUxxB series.
BZX38450-B5V6X 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):
- 5.6 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 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-B5V6X FAQ
1.How can I place an order for BZX38450-B5V6X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-B5V6X 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-B5V6X reliable?
The price and inventory of BZX38450-B5V6X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX38450-B5V6X is usually 5 days.
3.What payment methods are accepted for BZX38450-B5V6X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-B5V6X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-B5V6X?
BZX38450-B5V6X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-B5V6X 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-B5V6X?
For technical support, including BZX38450-B5V6X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-B5V6X requirements.
6.How does Aetrix verify that BZX38450-B5V6X is sourced from the original manufacturer or authorized distributors?
All BZX38450-B5V6X 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-B5V6X meets industry standards.
7.What is the process for return or replacement of BZX38450-B5V6X?
All BZX38450-B5V6X units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-B5V6X, 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-B5V6X part is unused and in its original packaging.
Return procedure for BZX38450-B5V6X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-B5V6X Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
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