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Nexperia USA Inc. BZX8450-C3V9-QVL
- Part No.:
- BZX8450-C3V9-QVL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-C3V9-QVL.pdf
- Description:
- DIODE ZENER 3.9V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:56,454
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Product details
Overview
BZX8450-C3V9-QVL from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, rated for 3.9 V nominal regulation at 50 µA test current, with ±5 % tolerance, 250 mW total power dissipation, and AEC-Q101 qualification for automotive use.
For engineers reviewing the BZX8450-C3V9-QVL datasheet, BZX8450-C3V9-QVL pinout, BZX8450-C3V9-QVL application, or BZX8450-C3V9-QVL equivalent, this part serves as a precision low-bias voltage reference in battery-powered sensor nodes, ECU voltage monitoring rails, and low-power I/O level-shifting circuits where leakage and thermal stability are critical.
Technical Context
This device operates as a two-terminal shunt regulator, maintaining stable reverse breakdown voltage across its cathode–anode terminals under controlled bias conditions. Its specified regulation at 50 µA enables ultra-low quiescent current operation, while intentional minor leakage rise (per AN90031) improves switching speed and noise performance.
The diode exhibits a negative temperature coefficient of −2.7 mV/K at 3.9 V, differential resistance ≤95 Ω at 5 mA, and capacitance of 150 pF at 0 V - characteristics optimized for signal integrity in automotive body electronics and portable instrumentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 3.9 V at IZ = 50 µA - defines primary regulation point for low-bias reference design |
| Tolerance | ±5 % - supports cost-sensitive automotive subsystems where tight voltage margins are not required |
| Power Dissipation | 250 mW at Tamb ≤ 25 °C - limits thermal rise on standard FR4 PCB with single-sided copper |
| Differential Resistance | ≤95 Ω at IZ = 5 mA - ensures minimal output voltage shift under small load variations |
| Reverse Leakage | 2.5 µA at VR = 3.0 V - enables accurate low-current biasing without excessive standby drain |
| Temperature Coefficient | −2.7 mV/K - quantifies voltage drift per degree Celsius for thermal error budgeting |
| Junction Temperature | 150 °C max - supports 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 lead pitch, tin-plated terminations compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-biased terminal; connects to lower-potential node in shunt regulation configuration |
| 2 | Not Connected (n.c.) | Internally isolated; must remain unconnected on PCB to avoid parasitic coupling or mechanical stress |
| 3 | Cathode (K) | Regulated output node; connects to supply rail being stabilized and provides reference return path |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
| Low test current specification | Regulation defined at 50 µA - enables direct use in microamp-level bias networks without external amplification |
| Optimized leakage profile | Intentional minor IR increase per AN90031 - reduces switching transients and high-frequency noise in sensing interfaces |
| Thermal resistance | Rth(j-sp) = 330 K/W - enables predictable junction-to-solder-point thermal modeling for layout validation |
| Small footprint | SOT23 package - supports high-density routing in space-constrained modules like door control units and lighting drivers |
Applications
| Automotive Body Control Module (BCM) | Portable Gas Sensor Interface |
|---|---|
Use Scenario: Voltage reference for analog front-end of LIN bus-connected window lift controller. IC Role / Device Role / Timing Role: Shunt regulator providing stable 3.9 V bias to op-amp input stage and ADC reference divider. Use Value: Enables <10 ppm/°C system offset drift over −40 °C to +125 °C ambient, meeting ISO 16750-4 requirements. |
Use Scenario: Bias supply for electrochemical CO sensor requiring sub-µA standby current. IC Role / Device Role / Timing Role: Low-leakage Zener establishing precise 3.9 V excitation voltage for sensor electrode drive. Use Value: Delivers 2.5 µA leakage at 3.0 V reverse bias, extending coin-cell battery life beyond 5 years in intermittent-read mode. |
| Industrial PLC Digital Input Card | USB-C Power Delivery Monitor |
Use Scenario: Overvoltage clamp and reference for 24 V DC digital input protection circuit. IC Role / Device Role / Timing Role: Zener clamping transient spikes while feeding regulated voltage to optocoupler LED bias network. Use Value: Withstands 40 W non-repetitive surge (100 µs), limiting input rail overshoot to <4.2 V during EFT testing. |
Use Scenario: Reference voltage source for CC line voltage detection in USB-C sink port. IC Role / Device Role / Timing Role: Provides stable 3.9 V threshold for comparator-based VCONN presence detection logic. Use Value: Maintains ±0.2 V regulation accuracy across 0–85 °C, ensuring reliable PD contract negotiation under thermal stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C3V9,115 (Nexperia) | Same SOT23 package and 3.9 V rating, but ±5 % tolerance and no AEC-Q101 qualification | Approved only for commercial-grade consumer electronics, not automotive systems | Select when AEC-Q101 compliance is unnecessary and cost is prioritized over qualification traceability |
| MMSZ5227ET1G (onsemi) | 3.9 V ±5 %, 500 mW Ptot, higher leakage (5 µA at 3.0 V), no intentional fast-switching leakage tuning | Higher power handling suits industrial power supplies but lacks noise-optimized leakage profile | Prefer for higher-current regulation where thermal margin exceeds 250 mW, but avoid in low-noise sensor bias paths |
Compared with BZX8450-C3V9-QVL, the BZX84-C3V9,115 sacrifices automotive qualification for lower unit cost, while MMSZ5227ET1G trades leakage optimization and thermal compactness for greater power headroom - making the QVL variant uniquely suited for AEC-Q101-compliant, low-noise, space-constrained automotive subsystems.
Availability
BZX8450-C3V9-QVL is available at Aetrix Electronics and suitable for automotive body electronics, portable gas sensing, industrial PLC input conditioning, and USB-C power delivery monitor circuits requiring stable component supply with full AEC-Q101 traceability.
Supply support for BZX8450-C3V9-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 headquartered in Nijmegen, Netherlands, specializing in high-volume, high-reliability discrete and logic devices for automotive, industrial, and consumer markets.
The BZX8450-Q series belongs to Nexperia's automotive-qualified Zener diode product line, engineered specifically for low-current voltage regulation in harsh-environment electronic control units where AEC-Q101 compliance and low-leakage stability are mandatory.
FAQ
What is the maximum continuous reverse current the BZX8450-C3V9-QVL can sustain without degradation?
The device is rated for a maximum forward current of 200 mA, but as a Zener regulator, it operates in reverse breakdown. Its safe continuous reverse current is limited by power dissipation: at 3.9 V, the absolute maximum steady-state reverse current is approximately 64 mA (250 mW ÷ 3.9 V), assuming Tamb ≤ 25 °C and proper PCB thermal design per datasheet footnote [2].
Does the 'QVL' suffix indicate tape-and-reel packaging or a specific quality grade?
The 'QVL' suffix denotes Nexperia's automotive-grade variant with full AEC-Q101 qualification, including extended temperature screening (−55 °C to +150 °C), humidity robustness, and lifetime reliability testing. It is supplied in standard 3 kΩ tape-and-reel format (EIA-481-D compliant), but the 'QVL' designation itself refers exclusively to the automotive qualification level, not packaging type.
Can BZX8450-C3V9-QVL replace BZX84-C3V9 in an existing design?
Yes, electrically and physically - both share identical SOT23 pinout, 3.9 V ±5 % rating, and 250 mW power limit. However, BZX8450-C3V9-QVL adds AEC-Q101 qualification, tighter process controls, and the AN90031-optimized leakage profile. Replacement is recommended for new automotive designs but requires revalidation of thermal and noise performance if used in legacy commercial applications.
Why does the datasheet specify Zener voltage at 50 µA instead of the more common 5 mA?
The 50 µA test current reflects the device's design focus on ultra-low-power applications such as battery-backed sensors and always-on monitoring circuits. Specifying VZ at this low current ensures predictable regulation behavior in microampere-bias networks, where traditional 5 mA testing would induce excessive standby current and thermal error - a key differentiator for automotive and IoT edge nodes.
BZX8450-C3V9-QVL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX8450-Q
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3.9 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 2 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:
- TO-236AB
BZX8450-C3V9-QVL FAQ
1.How can I place an order for BZX8450-C3V9-QVL through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-C3V9-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-C3V9-QVL reliable?
The price and inventory of BZX8450-C3V9-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-C3V9-QVL is usually 5 days.
3.What payment methods are accepted for BZX8450-C3V9-QVL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C3V9-QVL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-C3V9-QVL?
BZX8450-C3V9-QVL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-C3V9-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-C3V9-QVL?
For technical support, including BZX8450-C3V9-QVL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C3V9-QVL requirements.
6.How does Aetrix verify that BZX8450-C3V9-QVL is sourced from the original manufacturer or authorized distributors?
All BZX8450-C3V9-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-C3V9-QVL meets industry standards.
7.What is the process for return or replacement of BZX8450-C3V9-QVL?
All BZX8450-C3V9-QVL units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C3V9-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-C3V9-QVL part is unused and in its original packaging.
Return procedure for BZX8450-C3V9-QVL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-C3V9-QVL Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
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