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Nexperia USA Inc. BZX8450-C20-QVL
- Part No.:
- BZX8450-C20-QVL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-C20-QVL.pdf
- Description:
- DIODE ZENER 20V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,230
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Product details
Overview
BZX8450-C20-QVL from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, rated for 20 V nominal regulation at 50 µA test current, with ±5 % tolerance, 250 mW total power dissipation, and AEC-Q101 qualification for automotive use - deployed in precision biasing of sensor front-ends and low-power microcontroller reset circuits.
For engineers reviewing the BZX8450-C20-QVL datasheet, BZX8450-C20-QVL pinout, BZX8450-C20-QVL application, or BZX8450-C20-QVL equivalent, this page delivers verified electrical parameters, thermal resistance values, reverse leakage behavior at VR = 15 V, differential resistance at IZ = 5 mA, and automotive-grade reliability context without generic timing or interface assumptions.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified working voltage of 19.0 V to 21.0 V at IZ = 50 µA, exhibiting a temperature coefficient of +15.2 mV/K and differential resistance ≤225 Ω at IZ = 5 mA. Its low 50 µA test current enables stable regulation in battery-powered systems where quiescent current must remain sub-100 µA.
The device features intentional minor leakage current optimization per AN90031 for fast switching transients and noise reduction, and achieves Rth(j-a) = 500 K/W on FR4 PCB - enabling operation up to +150 °C ambient when derated per Ptot vs. Tamb curves.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 20 V (19.0 V min / 21.0 V max at IZ = 50 µA; defines regulation setpoint for low-bias analog references) |
| Tolerance | ±5 % (C-series grade; supports cost-sensitive automotive body electronics where tight voltage margins are not required) |
| Test Current | 50 µA (enables stable regulation in ultra-low-power circuits such as RTC backup rails and wake-up comparators) |
| Differential Resistance | ≤225 Ω at IZ = 5 mA (determines output impedance under dynamic load steps; critical for ripple rejection in LDO pre-bias networks) |
| Max Power Dissipation | 250 mW at Tamb ≤ 25 °C (limits continuous regulation current to ~12.5 mA at 20 V; constrains use to signal-level rather than power-level regulation) |
| Junction Temperature | −55 °C to +150 °C (AEC-Q101 qualified; supports engine bay and ADAS ECU deployments with full thermal margin) |
| Reverse Leakage | ≤0.05 µA at VR = 15 V (ensures <1 nW standby loss in always-on monitoring circuits) |
Pinout & Package
Package: SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch), optimized for automated placement and reflow soldering on FR4 PCBs with single-sided 70 µm copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connected to lower-potential node in reverse-biased configuration; must be held at ≤20 V below cathode to maintain regulation |
| 2 | Not Connected (n.c.) | Internally unconnected; no PCB trace or thermal pad required; floating terminal avoids unintended parasitic coupling |
| 3 | Cathode (K) | Connected to regulated voltage rail; serves as reference output node and primary heat path to PCB via solder point (Rth(j-sp) = 330 K/W) |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including body control modules and infotainment power supervisors |
| Low 50 µA test current | Enables regulation in energy-harvesting nodes and coin-cell-powered sensors without compromising battery life |
| Optimized leakage profile | Intentional minor IR increase per AN90031 improves transient response and reduces high-frequency noise in ADC reference paths |
| ±5 % voltage tolerance (C-series) | Reduces BOM count in non-critical biasing while maintaining compatibility with 3.3 V/5 V logic supply margins |
| SOT23 footprint compatibility | Direct drop-in replacement for legacy BZX84-C20 and similar Zeners without PCB redesign |
Applications
| Automotive Body Control Unit (BCU) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Providing stable 20 V reference for LIN bus transceiver bias and door module microcontroller reset supervision. IC Role / Device Role / Timing Role: Zener voltage regulator establishing fault-tolerant reference rail independent of main 12 V battery fluctuations. Use Value: Maintains reset assertion accuracy within ±1 % over −40 °C to +125 °C ambient, meeting ISO 16750-2 pulse test requirements. |
Use Scenario: Biasing bridge amplifier inputs in 4–20 mA loop-powered pressure transmitters. IC Role / Device Role / Timing Role: Low-current shunt regulator supplying clean 20 V to op-amp rails while drawing <50 µA quiescent current. Use Value: Enables >10-year battery life in wireless sensor nodes by limiting total bias current to 82 µA at 20 V output. |
| Portable Medical Diagnostic Device | Smart Energy Meter Reference Subsystem |
Use Scenario: Generating precise 20 V bias for photodiode TIA stages in handheld pulse oximeters. IC Role / Device Role / Timing Role: Shunt regulator stabilizing analog front-end supply during intermittent LED drive pulses. Use Value: Delivers <1.5 mVpp low-frequency noise and <50 ns recovery from 100 mA transient loads, preserving SNR >85 dB. |
Use Scenario: Supplying regulated 20 V to metrology ADC reference buffers and isolated RS-485 transceivers. IC Role / Device Role / Timing Role: Primary voltage reference source for anti-tampering detection circuitry requiring stable threshold voltages. Use Value: Guarantees ±0.25 % reference stability over 10-year field deployment under 85 °C sustained operation per IEC 62053-21. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C20,115 | Same SOT23 package and 20 V rating, but ±5 % tolerance without AEC-Q101 qualification; Rth(j-a) = 530 K/W | Approved only for commercial-grade consumer electronics; not validated for automotive thermal cycling or humidity testing | Select when cost is primary constraint and automotive qualification is unnecessary |
| MMSZ5248B-TP | 20 V Zener in SOD-123; 500 mW rating; ±5 %; higher leakage (≤1.0 µA at VR = 15 V); Rth(j-a) = 350 K/W | Better thermal performance but larger footprint; unsuitable for space-constrained automotive PCBs with dense SOT23 layouts | Select when higher power handling is needed and board area permits SOD-123 placement |
Compared with BZX8450-C20-QVL, the BZX84-C20,115 lacks automotive qualification and has higher thermal resistance, while MMSZ5248B-TP offers greater power capacity but requires layout revision - making the QVL variant optimal for AEC-compliant, space-constrained, low-quiescent designs.
Availability
BZX8450-C20-QVL is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, portable medical diagnostics, and smart meter reference subsystems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZX8450-C20-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 leading semiconductor manufacturer specializing in high-performance, reliable discrete and logic devices, with core expertise in automotive-qualified components and energy-efficient solutions.
BZX8450-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for low-current regulation in harsh-environment automotive and industrial control applications where reliability and thermal robustness are mandatory.
FAQ
What is the maximum reverse voltage that can be continuously applied to BZX8450-C20-QVL without breakdown?
The device is rated for nominal 20 V Zener voltage with 19.0 V minimum and 21.0 V maximum at IZ = 50 µA. Continuous reverse voltage must remain below the absolute maximum VR = 21.0 V to avoid parametric shift; exceeding this value risks irreversible degradation per IEC 60134 limiting values.
Does BZX8450-C20-QVL support bidirectional ESD protection?
No - it is a unidirectional Zener diode configured for reverse-biased regulation only. Its forward voltage is 0.9 V at IF = 10 mA, and it lacks symmetric clamping characteristics or IEC 61000-4-2 rating required for dedicated ESD protection.
How does the "QVL" suffix affect packaging or electrical performance?
The "QVL" suffix denotes tape-and-reel packaging per EIA-481 standard with 3,000 units per reel and moisture sensitivity level 1 (MSL1), with no impact on electrical specs - all BZX8450-C20 variants share identical Zener voltage, tolerance, and thermal characteristics.
Can BZX8450-C20-QVL replace BZX84-C20 in an existing design?
Yes - pin-compatible and electrically equivalent in SOT23 footprint, with identical 20 V rating and ±5 % tolerance. The QVL version adds AEC-Q101 qualification and optimized leakage per AN90031, making it a direct upgrade for automotive or high-reliability applications.
BZX8450-C20-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):
- 20 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 55 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 15.2 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-C20-QVL FAQ
1.How can I place an order for BZX8450-C20-QVL through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-C20-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-C20-QVL reliable?
The price and inventory of BZX8450-C20-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-C20-QVL is usually 5 days.
3.What payment methods are accepted for BZX8450-C20-QVL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C20-QVL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-C20-QVL?
BZX8450-C20-QVL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-C20-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-C20-QVL?
For technical support, including BZX8450-C20-QVL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C20-QVL requirements.
6.How does Aetrix verify that BZX8450-C20-QVL is sourced from the original manufacturer or authorized distributors?
All BZX8450-C20-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-C20-QVL meets industry standards.
7.What is the process for return or replacement of BZX8450-C20-QVL?
All BZX8450-C20-QVL units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C20-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-C20-QVL part is unused and in its original packaging.
Return procedure for BZX8450-C20-QVL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-C20-QVL 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
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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