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Nexperia USA Inc. BZX38450-C27-QX
- Part No.:
- BZX38450-C27-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-C27-QX.pdf
- Description:
- DIODE ZENER 27V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:7,495
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Product details
Overview
BZX38450-C27-QX from Nexperia is a low-current Zener voltage regulator diode in SOD323 (SC-76) package, rated for 27 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-C27-QX datasheet, BZX38450-C27-QX pinout, BZX38450-C27-QX application, or BZX38450-C27-QX equivalent, this page delivers verified electrical characteristics, thermal resistance values, cathode/anode terminal mapping, and automotive-grade reliability context - all confirmed from Nexperia's Rev. 4 product data sheet dated 16 July 2024.
Technical Context
This device operates as a two-terminal shunt voltage reference, maintaining stable 27 V output across load variations using reverse-biased Zener breakdown. Its specified test current of 50 µA enables ultra-low quiescent biasing in battery-powered systems.
It exhibits a temperature coefficient of +0.05 mV/K at IZ = 5 mA, differential resistance of 300 Ω at IZ = 50 µA, and junction-to-ambient thermal resistance of 415 K/W on FR4 PCB - confirming suitability for thermally constrained automotive sensor interfaces and low-power microcontroller supply rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 27 V at IZ = 50 µA - defines precise regulation point for low-bias reference circuits |
| Tolerance | ±5 % - supports cost-optimized designs where tighter regulation is not required |
| Power Dissipation | 300 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard FR4 PCB |
| Differential Resistance | 300 Ω at IZ = 50 µA - determines output impedance and load regulation error under light loads |
| Forward Voltage | 0.9 V at IF = 10 mA - defines forward conduction threshold for polarity-sensitive protection schemes |
| Junction Temperature | 150 °C max - enables operation in under-hood automotive environments |
| AEC-Q101 Qualified | Yes - validated for automotive discrete semiconductor stress testing per AEC standard |
Pinout & Package
Package: SOD323 (SC-76), surface-mounted plastic package; 2 leads; 1.3 mm pitch; 1.7 mm × 1.25 mm × 0.95 mm body; cathode indicated by marking bar.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; reverse-biased terminal during Zener operation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes Zener current path |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - reduces standby current in always-on automotive modules |
| Optimized leakage profile | Intentional minor rise in leakage current - improves switching speed and noise suppression per AN90031 |
| Automotive qualification | AEC-Q101 compliant - meets stress-test requirements for engine control, body electronics, and ADAS sensors |
| Small footprint | SOD323 package - saves board space in compact ECUs and infotainment modules |
Applications
| Automotive Sensor Reference | Low-Power MCU Reset Circuit |
|---|---|
|
Use Scenario: Providing stable 27 V reference for analog front-end of oxygen or pressure sensors in engine management systems. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precision bias point for signal conditioning amplifiers. Use Value: Enables accurate sensor output scaling despite wide ambient temperature swings (−40 °C to +125 °C). |
Use Scenario: Generating clean reset threshold for 3.3 V microcontrollers in telematics control units powered by 12 V battery rails. IC Role / Device Role / Timing Role: Zener clamp limiting voltage to supervisor IC input during cold-crank transients. Use Value: Prevents false resets during battery dips to 6 V while maintaining <1 µA quiescent draw. |
| Infotainment Power Sequencing | ADAS Camera Bias Supply |
|
Use Scenario: Regulating auxiliary 5 V rail for USB-C PD controller sequencing logic in head-unit power management. IC Role / Device Role / Timing Role: Low-current voltage reference stabilizing enable threshold of high-side load switch. Use Value: Ensures consistent turn-on timing across production batches due to ±5 % VZ tolerance and low rdiff. |
Use Scenario: Supplying bias voltage to CMOS image sensor analog blocks in surround-view camera modules. IC Role / Device Role / Timing Role: Noise-suppressed Zener source delivering clean 27 V to pixel array bias circuitry. Use Value: Reduces temporal noise by minimizing ripple coupling via optimized leakage profile per AN90031. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX38450-B27-Q | ±2 % tolerance vs. ±5 %; higher precision but tighter VZ distribution | Preferred in feedback loops requiring <1 % regulation error | Select when system-level accuracy outweighs cost sensitivity |
| MMSZ5254ET1G | 27 V nominal, ±5 %, SOD-123 package, 500 mW Ptot, non-AEC-Q101 | Lacks automotive qualification; higher power rating increases thermal margin | Use only in industrial or consumer applications without automotive reliability requirements |
Compared with BZX38450-C27-QX, the BZX38450-B27-Q offers tighter tolerance for precision references, while MMSZ5254ET1G provides higher power handling but no AEC-Q101 validation - making the original part optimal for cost-conscious, automotive-qualified 27 V shunt regulation.
Availability
BZX38450-C27-QX is available at Aetrix Electronics and suitable for automotive sensor interfaces, low-power MCU reset circuits, infotainment power sequencing, and ADAS camera bias supplies requiring stable component supply with AEC-Q101 traceability.
Supply support for BZX38450-C27-QX 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 essential efficiency technologies, delivering high-performance, reliable discrete and logic devices for automotive, industrial, and consumer markets.
BZX38450-Q series belongs to Nexperia's automotive-qualified Zener diode portfolio, engineered specifically for low-current, high-stability voltage regulation in harsh-environment electronic control units.
FAQ
What is the maximum reverse voltage before breakdown for BZX38450-C27-QX?
The nominal Zener voltage is 27 V, with a guaranteed range of 25.65 V to 28.35 V at IZ = 50 µA. Breakdown occurs within this band; operation above 28.35 V risks exceeding absolute maximum ratings. The device is not designed for avalanche operation beyond its specified VZ window.
Can BZX38450-C27-QX be used in series for higher voltage regulation?
No - series connection of Zener diodes introduces mismatched temperature coefficients and tolerance stacking, leading to unpredictable regulation. Each BZX38450-C27-QX is characterized individually at 50 µA; cascading would require recalibration and violates AEC-Q101 qualification scope.
Is the SOD323 package compatible with standard reflow profiles?
Yes - Nexperia specifies compatibility with JEDEC J-STD-020D reflow profiles. The SOD323 footprint in Figure 10 (0.5 mm solder land width, 1.35 mm center-to-center pitch) supports peak temperatures up to 260 °C for ≤ 30 seconds, validated for lead-free assembly.
How does the "intentional minor rise of leakage current" improve performance?
Per Application Note AN90031, this controlled leakage enhances carrier injection dynamics, reducing turn-on delay and high-frequency noise generation during transient events - critical for fast-switching sensor interfaces and EMI-sensitive ADAS subsystems.
BZX38450-C27-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Voltage - Zener (Nom) (Vz):
- 27 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 20.4 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX38450-C27-QX FAQ
1.How can I place an order for BZX38450-C27-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-C27-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-C27-QX reliable?
The price and inventory of BZX38450-C27-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-C27-QX is usually 5 days.
3.What payment methods are accepted for BZX38450-C27-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-C27-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-C27-QX?
BZX38450-C27-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-C27-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-C27-QX?
For technical support, including BZX38450-C27-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-C27-QX requirements.
6.How does Aetrix verify that BZX38450-C27-QX is sourced from the original manufacturer or authorized distributors?
All BZX38450-C27-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-C27-QX meets industry standards.
7.What is the process for return or replacement of BZX38450-C27-QX?
All BZX38450-C27-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-C27-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-C27-QX part is unused and in its original packaging.
Return procedure for BZX38450-C27-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-C27-QX Tags
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