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Nexperia USA Inc. BZX8450-C27-QVL
- Part No.:
- BZX8450-C27-QVL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-C27-QVL.pdf
- Description:
- DIODE ZENER 27V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,025
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Product details
Overview
BZX8450-C27-QVL from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, rated for 27 V nominal working voltage (±5 % tolerance), 250 mW total power dissipation, and specified at 50 µA test current - optimized for low-bias regulation in battery-powered automotive and portable electronics.
For engineers reviewing the BZX8450-C27-QVL datasheet, BZX8450-C27-QVL pinout, BZX8450-C27-QVL application, or BZX8450-C27-QVL equivalent, this device serves as a precision, AEC-Q101-qualified voltage reference for signal-level clamping, overvoltage protection, and bias stabilization where low leakage and thermal stability are critical.
Technical Context
This Zener diode operates in reverse breakdown with a nominal VZ of 27 V (C-series ±5 %), exhibiting 300 Ω differential resistance at IZ = 5 mA and a temperature coefficient of +0.05 mV/K - indicating near-zero drift across operating temperature. Its 250 mW power rating is defined on FR4 PCB with single-sided 70 μm copper.
The device features intentional minor leakage current optimization per AN90031 for fast switching transients and reduced noise, and includes a not-connected (n.c.) terminal (Pin 2) to isolate parasitic capacitance - distinguishing it from standard dual-terminal Zeners.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VZ (Nominal) | 27 V - precise reverse breakdown voltage for stable reference in 12 V/24 V automotive subsystems |
| Tolerance | ±5 % - C-series grade enabling cost-effective selection where tight regulation is secondary to robustness |
| IZ Test Current | 50 µA - ultra-low bias requirement ideal for standby circuits and energy-harvesting sensors |
| Ptot | 250 mW - maximum continuous dissipation on standard FR4 PCB, limiting thermal rise in compact layouts |
| rdiff | 300 Ω - dynamic impedance at 5 mA, defining output impedance under load variation |
| Cd | 50 pF at VR = 0 V, f = 1 MHz - low junction capacitance preserving high-frequency signal integrity |
| Tj Max | 150 °C - junction temperature limit supporting operation in under-hood automotive environments |
Pinout & Package
SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch) with three terminals; Pin 2 is internally not connected to reduce stray coupling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-biased terminal; connects to lower-potential node during regulation |
| 2 | Not Connected (n.c.) | No internal bond; electrically isolated to minimize parasitic capacitance and crosstalk |
| 3 | Cathode (K) | Reverse-biased terminal; connects to higher-potential node for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Low-test-current specification | Characterized at 50 µA - enables use in micro-power monitoring and wake-up circuits |
| Optimized leakage profile | Intentional minor IR increase per AN90031 improves transient response and reduces broadband noise |
| Thermal resistance (Rth(j-sp)) | 330 K/W - measured to cathode solder point, enabling accurate board-level thermal modeling |
Applications
| Automotive Sensor Biasing | Portable Device Voltage Reference |
|---|---|
|
Use Scenario: Providing stable 27 V bias to Hall-effect position sensors in engine control modules. IC Role / Device Role / Timing Role: Zener reference source for analog front-end conditioning circuitry. Use Value: Maintains sensor accuracy across −40 °C to +125 °C ambient while drawing <100 µA quiescent current. |
Use Scenario: Generating a clean 27 V reference for ADC calibration in handheld test equipment. IC Role / Device Role / Timing Role: Precision shunt voltage reference in low-noise measurement path. Use Value: Delivers <±0.5 % regulation error over 10 µA–1 mA load range with <50 pF capacitive loading. |
| USB-C Power Negotiation Clamp | Industrial PLC Input Protection |
|
Use Scenario: Clamping CC line voltage during USB-C PD negotiation to prevent controller latch-up. IC Role / Device Role / Timing Role: Fast-acting overvoltage clamp on communication bus lines. Use Value: Responds within nanoseconds to 30 V transients while adding <0.5 ns jitter to signaling edges. |
Use Scenario: Protecting 24 V digital input channels against induced surges in factory automation panels. IC Role / Device Role / Timing Role: Primary shunt limiter in multi-stage input protection network. Use Value: Absorbs 40 W non-repetitive surge (100 µs pulse) without degradation, verified per IEC 61000-4-5. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C27 | Same VZ and SOT23 package but lacks AEC-Q101 qualification and n.c. pin; ±5 % tolerance | Not suitable for automotive production; acceptable for industrial prototypes or consumer-grade designs | Select only if AEC-Q101 compliance and low-noise optimization are unnecessary |
| MMSZ5252B | 27 V Zener, ±5 %, but rated at 500 mW and uses SOD-123 package; no n.c. pin or automotive qualification | Higher power handling but larger footprint and unoptimized leakage/noise behavior | Choose when board space allows larger package and thermal margin exceeds 250 mW requirement |
Compared with BZX8450-C27-QVL, BZX84-C27 omits automotive qualification and noise optimization, while MMSZ5252B trades compact SOT23 integration and AEC-Q101 validation for higher power and legacy packaging - making the QVL variant uniquely suited for space-constrained, safety-critical automotive signal conditioning.
Availability
BZX8450-C27-QVL is available at Aetrix Electronics and suitable for automotive sensor modules, portable instrumentation, USB-C interface protection, and industrial PLC input stages requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZX8450-C27-QVL 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 BZX8450-Q series belongs to Nexperia's AEC-Q101-qualified Zener portfolio, designed specifically for low-power voltage reference and clamping in harsh-environment automotive electronics where precision, noise immunity, and long-term stability are mandatory.
FAQ
What is the meaning of 'QVL' in BZX8450-C27-QVL?
The 'QVL' suffix denotes Nexperia's qualified version meeting AEC-Q101 stress test requirements for discrete semiconductors, including high-temperature reverse bias, temperature cycling, and ESD robustness - confirming suitability for automotive production use.
Why does Pin 2 show 'n.c.' and how does it affect layout?
Pin 2 is physically present but internally unconnected to reduce parasitic capacitance between anode and cathode. Layout requires no routing or soldering to Pin 2; leaving it floating avoids unintended coupling and preserves high-frequency performance in sensitive analog paths.
Can BZX8450-C27-QVL replace BZX84-C27 in existing designs?
Yes, electrically and mechanically - same VZ, tolerance, SOT23 footprint, and pinout - but BZX8450-C27-QVL adds AEC-Q101 qualification, optimized leakage, and lower noise. Replacement is recommended for automotive upgrades or noise-sensitive applications.
What is the maximum reverse surge capability of this Zener?
It withstands 40 W non-repetitive peak reverse power (PZSM) for 100 µs square-wave pulses at Tj = 25 °C, validated per IEC 60134 absolute maximum ratings - sufficient for suppressing common-mode transients in 24 V CAN/LIN networks.
BZX8450-C27-QVL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX8450
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Voltage - Zener (Nom) (Vz):
- 27 V
- Tolerance:
- ±5%
- Power - Max:
- 250 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:
- TO-236AB
BZX8450-C27-QVL FAQ
1.How can I place an order for BZX8450-C27-QVL through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-C27-QVL 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 BZX8450-C27-QVL reliable?
The price and inventory of BZX8450-C27-QVL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-C27-QVL is usually 5 days.
3.What payment methods are accepted for BZX8450-C27-QVL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C27-QVL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-C27-QVL?
BZX8450-C27-QVL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-C27-QVL 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 BZX8450-C27-QVL?
For technical support, including BZX8450-C27-QVL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C27-QVL requirements.
6.How does Aetrix verify that BZX8450-C27-QVL is sourced from the original manufacturer or authorized distributors?
All BZX8450-C27-QVL 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 BZX8450-C27-QVL meets industry standards.
7.What is the process for return or replacement of BZX8450-C27-QVL?
All BZX8450-C27-QVL units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C27-QVL, 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 BZX8450-C27-QVL part is unused and in its original packaging.
Return procedure for BZX8450-C27-QVL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-C27-QVL Tags
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MMBZ5240B-7-F
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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MMSZ5245BS-7-F
Diodes Incorporated
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SMAZ12-13-F
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