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Nexperia USA Inc. BZX38450-C3V6-QX
- Part No.:
- BZX38450-C3V6-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-C3V6-QX.pdf
- Description:
- DIODE ZENER 3.6V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:20,727
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Product details
Overview
BZX38450-C3V6-Q 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 ±5 % tolerance, 300 mW total power dissipation, and AEC-Q101 qualification for automotive use.
For engineers reviewing the BZX38450-C3V6-Q datasheet, BZX38450-C3V6-Q pinout, BZX38450-C3V6-Q application, or BZX38450-C3V6-Q equivalent, this part supports precision low-bias voltage reference, battery-powered sensor biasing, and automotive ECU voltage clamping where stable low-current regulation is required.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified working voltage of 3.42 V to 3.78 V at IZ = 50 µA, exhibiting a temperature coefficient of −3.5 mV/K and differential resistance ≤95 Ω at IZ = 5 mA. Its low 50 µA test current enables operation in ultra-low-power circuits without compromising regulation accuracy.
Designed for automotive-grade reliability, it features qualified AEC-Q101 stress testing, junction temperature rating up to 150 °C, and thermal resistance from junction to ambient of 415 K/W on standard FR4 PCB - enabling robust performance in thermally constrained environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 3.6 V (3.42–3.78 V range at 50 µA; enables precise low-voltage rail clamping) |
| Tolerance | ±5 % (C-series; balances cost and accuracy for non-critical biasing applications) |
| Test Current | 50 µA (supports microamp-level bias networks in portable and automotive sensors) |
| Max Power Dissipation | 300 mW (limits thermal rise on standard FR4 PCB with single-sided copper) |
| Differential Resistance | ≤95 Ω at 5 mA (ensures stable regulation under small load variations) |
| Forward Voltage | ≤0.9 V at 10 mA (minimizes forward conduction loss during transient overvoltage events) |
| Junction Temperature | −55 °C to +150 °C (enables deployment in under-hood automotive modules) |
Pinout & Package
Package: SOD323 (SC-76), surface-mounted 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 marking bar aligns with this pin for correct PCB orientation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress-test requirements - supports Tier-1 ECU and ADAS module designs |
| Low 50 µA test current | Enables stable regulation in battery-backed circuits with sub-100 µA quiescent budgets |
| Optimized leakage profile | Intentional minor leakage rise improves switching speed and reduces noise in signal conditioning paths |
| SOD323 footprint | Compact 1.7 mm × 1.25 mm outline allows high-density placement on space-constrained PCBs |
Applications
| Automotive Sensor Biasing | Portable Gas Detector Reference |
|---|---|
Use Scenario: Providing stable 3.6 V bias to MEMS pressure sensor ICs in engine control units. IC Role / Device Role / Timing Role: Zener voltage reference for analog front-end amplifier biasing and ADC reference stabilization. Use Value: Maintains sensor offset accuracy across −40 °C to +125 °C ambient while drawing only 50 µA. |
Use Scenario: Supplying regulated excitation voltage to electrochemical gas sensing elements in handheld safety monitors. IC Role / Device Role / Timing Role: Low-current voltage clamp ensuring consistent sensor response under varying battery voltage (2.8–4.2 V). Use Value: Enables >10-year battery life via 50 µA operating point and eliminates need for active LDO. |
| Industrial PLC Input Protection | USB-C Port Voltage Clamp |
Use Scenario: Clamping 3.3 V logic inputs against ESD and surge transients in programmable logic controllers. IC Role / Device Role / Timing Role: Fast-acting shunt regulator absorbing transient energy before downstream logic gates. Use Value: 95 Ω dynamic impedance ensures rapid voltage stabilization during 1 kV ESD events per IEC 61000-4-2. |
Use Scenario: Protecting USB-C CC line receivers from overvoltage during hot-plug and cable fault conditions. IC Role / Device Role / Timing Role: Precision 3.6 V clamp limiting CC line voltage to prevent receiver latch-up. Use Value: ±5 % tolerance and −3.5 mV/K TC ensure reliable operation across full industrial temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B3V6-Q | ±2 % tolerance, higher initial accuracy but tighter rdiff (≤600 Ω at 5 mA) | Better for precision reference; less suitable for low-noise switching due to lower leakage optimization | Select when absolute voltage accuracy outweighs noise/switching performance |
| MMSZ4685T1G | Same 3.6 V nominal, ±5 %, but rated at 500 mW and not AEC-Q101 qualified | Acceptable for commercial-grade portable devices; unsuitable for automotive production | Choose only for cost-sensitive non-automotive designs requiring higher power margin |
Compared with BZX38450-C3V6-Q, the BZX384-B3V6-Q offers tighter voltage tolerance but lacks intentional leakage tuning for noise reduction, while MMSZ4685T1G provides higher power headroom but no automotive qualification - making the C-series optimal for AEC-compliant, low-noise, battery-efficient systems.
Availability
BZX38450-C3V6-Q is available at Aetrix Electronics and suitable for automotive ECU design, portable medical sensor modules, and industrial PLC input protection requiring stable component supply with guaranteed long-term continuity.
Supply support for BZX38450-C3V6-Q 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 belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for low-current voltage regulation in harsh-environment automotive and industrial electronics.
FAQ
What is the maximum reverse current at 3.6 V regulation for BZX38450-C3V6-Q?
At nominal Zener voltage (3.6 V), the reverse current is specified at 50 µA test condition. The maximum reverse current at VR = 3.6 V is not defined - instead, the device regulates at that voltage when reverse-biased with ≥50 µA. Leakage remains ≤2.0 µA at VR = 2.0 V per datasheet Table 8.
Can BZX38450-C3V6-Q be used in parallel for higher power handling?
No - Zener diodes exhibit negative temperature coefficients and mismatched breakdown voltages, causing current hogging and thermal runaway when paralleled. For higher power, select a single higher-rated device like BZX38450-C3V6-Q's 500 mW counterpart or use an active regulator.
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 × 0.6 mm solder lands with 0.6 mm spacing, supporting peak temperatures up to 260 °C for ≤30 seconds without degradation.
How does the −3.5 mV/K temperature coefficient affect regulation stability?
A −3.5 mV/K coefficient means the Zener voltage decreases by 3.5 mV per degree Celsius rise in junction temperature. Over a 100 °C range (−40 °C to +60 °C ambient), this yields ~350 mV drift - acceptable for biasing but requires compensation in precision references.
BZX38450-C3V6-QX 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-QX FAQ
1.How can I place an order for BZX38450-C3V6-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-C3V6-QX 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-QX reliable?
The price and inventory of BZX38450-C3V6-QX 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-QX is usually 5 days.
3.What payment methods are accepted for BZX38450-C3V6-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-C3V6-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-C3V6-QX?
BZX38450-C3V6-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-C3V6-QX 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-QX?
For technical support, including BZX38450-C3V6-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-C3V6-QX requirements.
6.How does Aetrix verify that BZX38450-C3V6-QX is sourced from the original manufacturer or authorized distributors?
All BZX38450-C3V6-QX 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-QX meets industry standards.
7.What is the process for return or replacement of BZX38450-C3V6-QX?
All BZX38450-C3V6-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-C3V6-QX, 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-QX part is unused and in its original packaging.
Return procedure for BZX38450-C3V6-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-C3V6-QX Tags
-
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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