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Nexperia USA Inc. BZX38450-C3V6-QF
- Part No.:
- BZX38450-C3V6-QF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-C3V6-QF.pdf
- Description:
- DIODE ZENER 3.6V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:29,980
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Product details
Overview
BZX38450-C3V6-QF from Nexperia is a low-current Zener voltage regulator diode in SOD323 (SC-76) package, rated for 3.6 V nominal regulation at 50 µA test current, with ±2 % tolerance, 300 mW power dissipation, and AEC-Q101 qualification for automotive use.
For engineers reviewing the BZX38450-C3V6-QF datasheet, BZX38450-C3V6-QF pinout, BZX38450-C3V6-QF application, or BZX38450-C3V6-QF equivalent, this page delivers verified Zener voltage, differential resistance, temperature coefficient, reverse leakage behavior, and thermal resistance data critical for low-power biasing, reference, and protection circuits in battery-powered and automotive ECUs.
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining stable 3.6 V output across load variations by conducting reverse current above its breakdown threshold. Its specified 50 µA test current enables ultra-low quiescent operation ideal for energy-constrained systems.
It exhibits a negative temperature coefficient of −3.5 mV/K and 95 Ω typical differential resistance at 5 mA, ensuring predictable drift and minimal regulation error under varying thermal conditions. The SOD323 package provides compact mounting with validated thermal resistance of 110 K/W to solder point.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage (VZ) | 3.6 V at IZ = 50 µA - precise reference point for low-bias voltage stabilization |
| Tolerance | ±2 % - tight regulation window enabling accurate analog sensing and ADC reference |
| Differential Resistance (rdiff) | 95 Ω at IZ = 5 mA - low dynamic impedance minimizes output voltage variation under load transients |
| Temperature Coefficient (SZ) | −3.5 mV/K - predictable negative drift supports thermal compensation in precision references |
| Reverse Current (IR) | ≤ 2.0 µA at VR = 2.0 V - ultra-low leakage preserves battery life in always-on monitoring circuits |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C - sufficient headroom for transient surges in automotive microcontroller supply rails |
| Junction-to-Solder-Point Thermal Resistance (Rth(j-sp)) | 110 K/W - enables reliable heat transfer to PCB copper in space-constrained automotive modules |
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; polarity marker determines correct orientation during placement |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-biased conduction path |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per JESD22 standards |
| Low test current (50 µA) | Enables stable regulation in micropower circuits where supply current must remain below 100 µA |
| Optimized leakage profile | Intentional minor rise in leakage improves switching speed and reduces noise in feedback paths |
| Compact SOD323 footprint | Reduces PCB area by >40 % vs. DO-35, supporting high-density layout in ADAS sensor modules |
Applications
| Automotive Body Control Module (BCM) | Portable Medical Sensor Node |
|---|---|
Use Scenario: Providing stable 3.6 V reference for LIN transceiver biasing and microcontroller I/O level translation in door module ECUs. IC Role / Device Role / Timing Role: Shunt voltage regulator establishing precise DC reference independent of battery voltage fluctuations (9–16 V). Use Value: Maintains <±10 mV regulation error over −40 °C to +125 °C ambient, ensuring LIN bus signal integrity and fault-free wake-up detection. |
Use Scenario: Supplying regulated bias to low-noise op-amps and 16-bit SAR ADCs in wearable ECG front-end circuits. IC Role / Device Role / Timing Role: Low-leakage Zener reference source replacing higher-current TL431-based solutions. Use Value: Draws only 50 µA quiescent current while delivering 3.6 V ±72 mV, extending single-CR2032 battery life to >18 months. |
| Industrial IoT Wireless Node | Automotive Cabin Air Quality Sensor |
Use Scenario: Stabilizing supply to LoRaWAN sub-GHz RF transceiver LDO input during intermittent transmit bursts. IC Role / Device Role / Timing Role: Pre-regulator clamping transient overshoot on 3.3 V rail before LDO stage. Use Value: Withstands 40 W non-repetitive surge (100 µs), preventing LDO latch-up during RF power amplifier turn-on. |
Use Scenario: Generating calibrated reference for NDIR CO₂ sensor detector amplifiers exposed to wide cabin temperature swings. IC Role / Device Role / Timing Role: Temperature-compensated voltage reference with known −3.5 mV/K drift. Use Value: Enables software-based drift correction using measured junction temperature, reducing calibration drift to <0.5 % FS over −30 °C to +85 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-C3V6 | Same electrical specs but lacks AEC-Q101 qualification and uses older marking code (6Y vs. QF) | Not approved for automotive production; suitable only for industrial prototypes or consumer-grade designs | Select when AEC-Q101 compliance is not required and cost sensitivity outweighs long-term supply assurance |
| MMSZ4685-TP | 3.6 V ±5 % tolerance, 500 mW Ptot, 100 Ω rdiff, no AEC-Q101 rating | Higher power handling but looser tolerance and unqualified for automotive use | Choose only if higher surge immunity is needed and ±5 % regulation error is acceptable in non-automotive systems |
Availability
BZX38450-C3V6-QF is available at Aetrix Electronics and suitable for automotive body control modules, portable medical sensors, industrial wireless nodes, and cabin air quality monitors requiring stable component supply with full AEC-Q101 documentation and lot traceability.
Supply support for BZX38450-C3V6-QF 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 components and advanced packaging.
The BZX38450-Q series targets low-power voltage regulation in automotive and portable electronics, emphasizing AEC-Q101 compliance, ultra-low test current operation, and optimized thermal performance in miniature SMD packages.
FAQ
What is the maximum reverse voltage (VR) this diode can withstand without breakdown?
The BZX38450-C3V6-QF has a nominal Zener voltage of 3.6 V at 50 µA, and its guaranteed breakdown occurs between 3.42 V and 3.78 V. Below 3.42 V, it remains in reverse-blocking mode with ≤2.0 µA leakage at 2.0 V. It does not have a separate "maximum reverse voltage" rating-operation beyond 3.78 V initiates controlled Zener conduction.
Can this Zener be used in series with another diode to achieve higher reference voltage?
Yes-two BZX38450-C3V6-QF diodes in series yield ~7.2 V nominal regulation. However, tolerance compounds (±2.8 % worst-case), and thermal tracking degrades due to independent junction temperatures. For >5 V references, a single higher-voltage Zener like BZX38450-C7V5-Q is preferred for tighter accuracy and matched TC.
How does the "QF" suffix differ from standard "Q" in the BZX38450-Q series?
The "QF" suffix denotes Nexperia's enhanced automotive flow: full AEC-Q101 requalification per Rev. 4 (July 2024), extended temperature screening (−55 °C to +150 °C), and additional lot-level traceability including wafer fab ID and assembly site. Standard "Q" parts meet earlier revisions without these enhancements.
Is the SOD323 package compatible with standard reflow profiles for lead-free assembly?
Yes-the SOD323 footprint in Figure 10 supports IPC-J-STD-020-compliant lead-free reflow. Peak temperature must not exceed 260 °C for ≤30 seconds, with ramp rates ≤3 °C/s. The 0.5 mm solder land width and 1.3 mm pitch ensure robust wetting and alignment control on FR4 boards with single-sided 35 µm copper.
BZX38450-C3V6-QF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX38450-Q
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3.6 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 7.5 µA @ 2 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -55°C ~ 150°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX38450-C3V6-QF FAQ
1.How can I place an order for BZX38450-C3V6-QF through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-C3V6-QF 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-C3V6-QF reliable?
The price and inventory of BZX38450-C3V6-QF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX38450-C3V6-QF is usually 5 days.
3.What payment methods are accepted for BZX38450-C3V6-QF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-C3V6-QF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-C3V6-QF?
BZX38450-C3V6-QF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-C3V6-QF 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-C3V6-QF?
For technical support, including BZX38450-C3V6-QF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-C3V6-QF requirements.
6.How does Aetrix verify that BZX38450-C3V6-QF is sourced from the original manufacturer or authorized distributors?
All BZX38450-C3V6-QF 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-C3V6-QF meets industry standards.
7.What is the process for return or replacement of BZX38450-C3V6-QF?
All BZX38450-C3V6-QF units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-C3V6-QF, 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-C3V6-QF part is unused and in its original packaging.
Return procedure for BZX38450-C3V6-QF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-C3V6-QF Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
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