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Nexperia USA Inc. BZX38450-C6V8-QF
- Part No.:
- BZX38450-C6V8-QF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-C6V8-QF.pdf
- Description:
- DIODE ZENER 6.8V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:9,477
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Product details
Overview
BZX38450-C6V8-QF from Nexperia is a low-current Zener voltage regulator diode in SOD323 (SC-76) package, rated for 6.8 V nominal regulation at 50 µA test current, with ±5 % tolerance, 300 mW power dissipation, and AEC-Q101 qualification for automotive use.
For engineers reviewing the BZX38450-C6V8-QF datasheet, BZX38450-C6V8-QF pinout, BZX38450-C6V8-QF application, or BZX38450-C6V8-QF equivalent, key selection criteria include low-bias operation at 50 µA, thermal resistance of 110 K/W to solder point, 100 pF capacitance at 0 V, and cathode-anode polarity marking per JEDEC standard.
Technical Context
This device operates as a precision shunt voltage reference with specified regulation at IZ = 50 µA - enabling stable biasing in ultra-low-power sensor interfaces and battery monitoring circuits. Its differential resistance of 80 Ω at 5 mA and temperature coefficient of +1.2 mV/K ensure predictable drift under thermal variation.
The SOD323 package supports high-density PCB layouts while maintaining junction-to-solder-point thermal resistance of 110 K/W, critical for reliability in thermally constrained automotive modules. Reverse leakage remains ≤0.1 µA at 5.1 V, supporting accurate low-voltage threshold detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 6.8 V at IZ = 50 µA - defines precise regulation point for low-current reference circuits |
| Tolerance | ±5 % - supports cost-optimized designs where tighter tolerance is not required |
| Power Dissipation | 300 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard FR4 PCB |
| Differential Resistance | 80 Ω at IZ = 5 mA - determines output impedance and load regulation error in shunt configurations |
| Reverse Leakage | ≤0.1 µA at VR = 5.1 V - ensures minimal quiescent current in standby or sleep-mode applications |
| Capacitance | 100 pF at VR = 0 V, f = 1 MHz - impacts high-frequency noise filtering and signal integrity in RF-adjacent circuits |
| Thermal Resistance | 110 K/W junction-to-solder-point - enables thermal modeling for solder-joint reliability in automotive under-hood environments |
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 voltage node; marking bar identifies this terminal for correct PCB orientation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; forms shunt path for excess current during regulation |
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 operation | Specified at 50 µA - enables direct integration into microamp-level battery-powered systems without additional bias circuitry |
| Optimized leakage profile | Intentional minor rise in IR supports fast switching transients and reduced noise in feedback loops |
| Small footprint | SOD323 package occupies <1.5 mm² PCB area - ideal for space-constrained modules like door ECUs and seat controllers |
Applications
| Automotive Door Module Voltage Reference | Portable Gas Sensor Bias Supply |
|---|---|
Use Scenario: Stable 6.8 V reference for analog front-end of LIN-controlled door lock actuator MCU. IC Role / Device Role / Timing Role: Shunt voltage regulator providing precision bias to op-amp input stage and ADC reference divider. Use Value: Maintains ±1.5 % reference accuracy across −40 °C to +125 °C ambient, meeting ISO 16750-4 requirements. |
Use Scenario: Low-power bias source for electrochemical CO sensor operating from coin cell. IC Role / Device Role / Timing Role: Zener shunt regulator establishing fixed 6.8 V node for sensor heater control and signal conditioning. Use Value: Draws only 50 µA at regulation, extending CR2032 battery life beyond 5 years in intermittent-read mode. |
| Industrial PLC Input Protection Clamp | Medical Wearable Battery Monitor |
Use Scenario: Overvoltage clamp on 24 V digital input channel subjected to transient surges. IC Role / Device Role / Timing Role: Fast-acting shunt limiter absorbing energy during IEC 61000-4-5 surge events. Use Value: Withstands non-repetitive 40 W peak reverse power for 100 µs, protecting downstream optocoupler inputs. |
Use Scenario: Precision voltage reference for lithium-ion cell voltage measurement in patch-style ECG monitor. IC Role / Device Role / Timing Role: Regulated supply for 16-bit SAR ADC reference buffer and low-dropout LDO enable threshold. Use Value: 100 pF capacitance minimizes coupling of switching noise from PMU into analog measurement path. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B6V8-Q | ±2 % tolerance, lower rdiff (160 Ω), higher leakage (1 µA at 5.1 V) | Better regulation stability but higher quiescent current | Select when tighter voltage accuracy outweighs battery drain concerns |
| MMSZ5234B-TP | Same 6.8 V nominal, ±5 %, but SOD-123 package (larger footprint, 500 mW rating) | Higher power margin but incompatible with SOD323 land pattern | Choose only if thermal headroom >300 mW is required and board rework is acceptable |
Compared with BZX38450-C6V8-QF, the BZX384-B6V8-Q offers improved voltage precision at the cost of higher leakage, while MMSZ5234B-TP trades miniaturization for thermal robustness - making the C-series optimal for AEC-Q101-compliant, space-constrained, ultra-low-power designs.
Availability
BZX38450-C6V8-QF is available at Aetrix Electronics and suitable for automotive body electronics, portable medical sensors, industrial PLC I/O protection, and battery management systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZX38450-C6V8-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 delivering high-performance logic, discrete, and MOSFET devices optimized for efficiency, reliability, and miniaturization in automotive and industrial markets.
The BZX38450-Q series targets low-current voltage regulation in space- and power-constrained applications, with design emphasis on AEC-Q101 compliance, low-test-current specification, and SOD323 scalability across 1.8 V–51 V Zener voltages.
FAQ
What is the maximum continuous forward current for BZX38450-C6V8-QF?
The absolute maximum forward current is 250 mA per limiting values table, but sustained operation above 10 mA is not recommended due to thermal constraints in the SOD323 package. At 10 mA, forward voltage is guaranteed ≤0.9 V, and junction temperature must remain ≤150 °C with proper PCB copper area.
Does BZX38450-C6V8-QF support bidirectional ESD protection?
No - it is a unidirectional Zener diode configured for reverse-biased regulation only. Its anode-cathode structure provides no clamping in forward direction beyond typical silicon diode VF (~0.9 V). For bidirectional protection, a dedicated TVS array such as PESD5V0S1BA must be used.
How does the "C" suffix affect temperature coefficient behavior?
The "C" suffix denotes the ±5 % tolerance variant with intentionally elevated leakage current, resulting in a positive temperature coefficient of +1.2 mV/K at 6.8 V - contrasting with "B" variants that exhibit near-zero or slightly negative coefficients. This improves regulation stability under rising ambient conditions in automotive cabins.
Can BZX38450-C6V8-QF be used in parallel for higher current handling?
No - Zener diodes cannot be reliably paralleled due to mismatched breakdown voltages causing current hogging. Even within the same reel, VZ variation (±5 %) leads to unequal current sharing. For higher current, use a single higher-rated device like BZX84-C6V8 or implement active regulation with a transistor-based shunt.
BZX38450-C6V8-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):
- 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-QF FAQ
1.How can I place an order for BZX38450-C6V8-QF through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-C6V8-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-C6V8-QF reliable?
The price and inventory of BZX38450-C6V8-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-C6V8-QF is usually 5 days.
3.What payment methods are accepted for BZX38450-C6V8-QF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-C6V8-QF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-C6V8-QF?
BZX38450-C6V8-QF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-C6V8-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-C6V8-QF?
For technical support, including BZX38450-C6V8-QF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-C6V8-QF requirements.
6.How does Aetrix verify that BZX38450-C6V8-QF is sourced from the original manufacturer or authorized distributors?
All BZX38450-C6V8-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-C6V8-QF meets industry standards.
7.What is the process for return or replacement of BZX38450-C6V8-QF?
All BZX38450-C6V8-QF units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-C6V8-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-C6V8-QF part is unused and in its original packaging.
Return procedure for BZX38450-C6V8-QF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-C6V8-QF 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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