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Nexperia USA Inc. BZX38450-C6V8-QX
- Part No.:
- BZX38450-C6V8-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-C6V8-QX.pdf
- Description:
- DIODE ZENER 6.8V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:27,737
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Product details
Overview
BZX38450-C6V8-Q from Nexperia is a low-current Zener voltage regulator diode in SOD323 (SC-76) package, designed for precision voltage reference and regulation at 6.8 V nominal with ±5 % tolerance. It delivers 80 Ω differential resistance at 5 mA, operates at 50 μA test current, and supports automotive-grade reliability per AEC-Q101. It is used in battery-powered sensor signal conditioning circuits requiring stable bias under ultra-low quiescent current.
For engineers reviewing the BZX38450-C6V8-Q datasheet, BZX38450-C6V8-Q pinout, BZX38450-C6V8-Q application, or BZX38450-C6V8-Q equivalent, key selection criteria include its 6.8 V Zener voltage, 80 Ω dynamic impedance, 300 mW power rating, AEC-Q101 qualification, and SOD323 footprint compatibility with space-constrained PCB layouts.
Technical Context
This device functions as a two-terminal shunt voltage regulator, maintaining a stable 6.8 V reverse breakdown across load variations using controlled Zener conduction. Its specified test current of 50 μA enables operation in micro-power systems where traditional regulators draw excessive quiescent current.
The ±5 % tolerance (C-series), 1.2 mV/K temperature coefficient, and 100 pF capacitance at 1 MHz support stable DC biasing in analog front-ends without introducing significant noise or phase shift. Its intentional minor leakage rise improves switching transients and reduces high-frequency noise in automotive sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.46 V to 7.14 V at IZ = 50 μA - defines precise regulation window for low-bias reference design |
| Differential Resistance (rdiff) | 80 Ω max at IZ = 5 mA - ensures minimal output voltage variation under load current changes |
| Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C - sets thermal derating boundary for FR4 PCB mounting |
| Forward Voltage (VF) | 0.9 V max at IF = 10 mA - limits forward conduction loss during polarity-reversal protection |
| Reverse Current (IR) | 0.1 μA max at VR = 5.1 V - guarantees negligible leakage below regulation threshold |
| Temperature Coefficient (SZ) | +1.2 mV/K - enables predictable VZ drift compensation in wide-temperature automotive environments |
| Junction Temperature (Tj) | −55 °C to +150 °C - supports operation in under-hood automotive ECUs and industrial control 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 (K) | Cathode | Connected to regulated output node; reverse-biased terminal where Zener breakdown occurs |
| 2 (A) | Anode | Connected to ground or lower-potential rail; completes shunt regulation path |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, ADAS sensors, and body electronics |
| Low test current (50 μA) | Enables use in energy-harvesting and coin-cell-powered IoT nodes without compromising battery life |
| Optimized leakage profile | Intentional minor IR increase reduces switching noise and improves transient response in feedback loops |
| ±5 % voltage tolerance (C-series) | Provides cost-effective regulation accuracy for non-critical biasing without trimming circuitry |
| Thermal resistance (Rth(j-a)) | 415 K/W in free air - informs thermal layout decisions for ambient-temperature-limited designs |
Applications
| Automotive Cabin Sensors | Portable Medical Monitors |
|---|---|
Use Scenario: Voltage reference for thermistor-based cabin temperature sensing in HVAC control modules. IC Role / Device Role / Timing Role: Shunt Zener reference providing stable 6.8 V bias to ADC input stage and op-amp signal conditioning. Use Value: Maintains <±0.5 % reference stability over −40 °C to +125 °C, meeting ISO 16750-4 environmental requirements. |
Use Scenario: Precision bias supply for low-power ECG front-end amplifiers powered by CR2032 batteries. IC Role / Device Role / Timing Role: Low-quiescent-current voltage clamp ensuring consistent amplifier gain and offset calibration. Use Value: Draws only 50 μA test current, extending single-battery operational life beyond 12 months. |
| Industrial PLC Input Modules | Smart Meter Reference Circuits |
Use Scenario: Overvoltage protection and level-shifting for 24 V digital input channels in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Clamp diode limiting input voltage swing to protect downstream logic while enabling fast edge detection. Use Value: 80 Ω rdiff ensures <100 mV droop during 10 mA transient surges, preserving signal integrity. |
Use Scenario: Stable reference for metrology-grade ADCs measuring grid voltage and current harmonics. IC Role / Device Role / Timing Role: Primary voltage reference source feeding precision bandgap buffers and DAC calibration paths. Use Value: +1.2 mV/K temperature coefficient allows software compensation to achieve <10 ppm/°C system-level drift. |
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-B6V8-Q | ±2 % tolerance, 160 Ω rdiff at 5 mA, same SOD323 package | Higher precision but higher impedance; suited for tighter regulation where load current is stable | Select when absolute voltage accuracy > stability under varying load |
| MMSZ5234B-7-F | 6.8 V ±5 %, 500 mW Ptot, SOD-123 package (2.7 mm × 1.6 mm) | Larger footprint and higher power handling; not AEC-Q101 qualified | Choose only for non-automotive, higher-power applications where board space permits |
Compared with BZX38450-C6V8-Q, the BZX384-B6V8-Q offers tighter voltage tolerance but poorer load regulation due to higher dynamic impedance, while MMSZ5234B-7-F trades automotive qualification and compact size for greater power margin and non-qualified industrial use.
Availability
BZX38450-C6V8-Q is available at Aetrix Electronics and suitable for automotive cabin electronics, portable medical instrumentation, industrial PLC input stages, and smart meter reference circuits requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZX38450-C6V8-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 technologies.
The BZX38450-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for low-current voltage reference and regulation in harsh-environment automotive and industrial applications.
FAQ
What is the maximum reverse voltage this diode can withstand before breakdown?
The BZX38450-C6V8-Q has a nominal Zener voltage of 6.8 V with a guaranteed range of 6.46 V to 7.14 V at 50 μA test current. Its absolute maximum non-repetitive peak reverse voltage is not specified separately; instead, it is limited by the 40 W non-repetitive surge rating at 100 µs pulse width and junction temperature constraints. Continuous reverse operation must remain within the 6.46–7.14 V regulation band.
Is this device suitable for use in a 12 V automotive power rail clamping circuit?
No - the BZX38450-C6V8-Q is rated for 6.8 V regulation and is not intended for direct 12 V rail clamping. Its maximum continuous reverse voltage is ~7.14 V; applying 12 V would exceed its power dissipation limit (300 mW) and cause thermal runaway. For 12 V clamping, a higher-voltage Zener such as BZX38450-C12-Q (11.4–12.6 V) or TVS diode is required.
How does the "C" in the part number affect electrical behavior compared to "B" variants?
The "C" suffix denotes ±5 % voltage tolerance and an intentional minor rise in leakage current optimized for fast switching and reduced noise, per application note AN90031. In contrast, "B" variants offer ±2 % tolerance and lower leakage, making them preferable for ultra-low-current precision references where noise is secondary to accuracy.
Can this diode be soldered using standard reflow profiles for lead-free assembly?
Yes - the BZX38450-C6V8-Q is qualified for lead-free reflow soldering per JEDEC J-STD-020. Its SOD323 package supports peak temperatures up to 260 °C for ≤ 30 seconds. The recommended reflow footprint (Fig. 10) uses 0.5 mm × 0.6 mm solder pads with 1.35 mm center-to-center spacing, matching standard SOD323 land patterns.
BZX38450-C6V8-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):
- 6.8 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 5.1 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-C6V8-QX FAQ
1.How can I place an order for BZX38450-C6V8-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-C6V8-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-C6V8-QX reliable?
The price and inventory of BZX38450-C6V8-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-C6V8-QX is usually 5 days.
3.What payment methods are accepted for BZX38450-C6V8-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-C6V8-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-C6V8-QX?
BZX38450-C6V8-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-C6V8-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-C6V8-QX?
For technical support, including BZX38450-C6V8-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-C6V8-QX requirements.
6.How does Aetrix verify that BZX38450-C6V8-QX is sourced from the original manufacturer or authorized distributors?
All BZX38450-C6V8-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-C6V8-QX meets industry standards.
7.What is the process for return or replacement of BZX38450-C6V8-QX?
All BZX38450-C6V8-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-C6V8-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-C6V8-QX part is unused and in its original packaging.
Return procedure for BZX38450-C6V8-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-C6V8-QX 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
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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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