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Nexperia USA Inc. BZX8450-C24-QVL
- Part No.:
- BZX8450-C24-QVL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-C24-QVL.pdf
- Description:
- DIODE ZENER 24V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,080
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Product details
Overview
BZX8450-C24-QVL from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, designed for precision biasing and voltage reference in automotive and portable electronics. It delivers a nominal 24 V regulation at 50 µA test current, with ±5 % tolerance, 250 mW total power dissipation, and 250 Ω differential resistance at 5 mA - enabling stable operation in low-power sensor interfaces and ECU supply monitoring circuits.
For engineers reviewing the BZX8450-C24-QVL datasheet, BZX8450-C24-QVL pinout, BZX8450-C24-QVL application, or BZX8450-C24-QVL equivalent, this page provides verified electrical parameters, AEC-Q101 qualification status, thermal resistance data (Rth(j-a) = 500 K/W), and real-world use context for battery-powered and automotive-grade designs.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified working voltage of 22.8 V to 25.2 V at IZ = 50 µA, exhibiting a temperature coefficient of +18.2 mV/K and reverse current ≤ 0.05 µA at VR = 18.2 V. Its low 50 µA test current enables minimal quiescent draw in always-on circuits.
The device features intentional leakage optimization per AN90031 for fast switching and noise reduction, and is qualified to AEC-Q101 with junction temperature rating up to 150 °C - confirming suitability for under-hood automotive environments where thermal stability and reliability are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage (VZ) | 22.8 V to 25.2 V at IZ = 50 µA - defines precise regulation band for 24 V rail supervision |
| Tolerance | ±5 % - supports cost-optimized designs where tight voltage accuracy is not required |
| Differential Resistance (rdiff) | 250 Ω at IZ = 5 mA - determines load regulation error under varying current conditions |
| Power Dissipation (Ptot) | 250 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard FR4 PCB |
| Forward Voltage (VF) | ≤ 0.9 V at IF = 10 mA - ensures low loss when used in forward-biased protection or clamping roles |
| Reverse Current (IR) | ≤ 0.05 µA at VR = 18.2 V - guarantees ultra-low standby leakage in battery-critical applications |
| Junction Temperature (Tj) | −55 °C to +150 °C - validates operation across full automotive ambient range |
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: anode (Pin 1), not connected (Pin 2), cathode (Pin 3). Pin 2 is internally unconnected and must remain floating in PCB layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connects to lower-potential node; reverse-bias polarity reference for Zener operation |
| 2 | Not Connected | No internal bond wire; must be left unconnected on PCB to avoid parasitic coupling |
| 3 | Cathode | Connects to higher-potential node; primary terminal for voltage reference output and heat sinking |
Key Features
| Feature | Design Value |
|---|---|
| Low Test Current Operation | Specified at 50 µA - reduces bias network current by >95 % vs. conventional 5 mA Zeners |
| AEC-Q101 Qualification | Qualified for automotive use - eliminates need for additional qualification testing in Tier-1 designs |
| Optimized Leakage Profile | Intentional minor IR rise per AN90031 - improves transient response and reduces high-frequency noise in feedback paths |
| Thermal Performance | Rth(j-sp) = 330 K/W to cathode solder point - enables reliable thermal transfer in compact layouts |
Applications
| Automotive ECU Power Monitoring | Portable Gas Sensor Biasing |
|---|---|
Use Scenario: Monitoring 24 V supply integrity in engine control units under wide temperature and vibration conditions. IC Role / Device Role / Timing Role: Zener reference element in comparator-based undervoltage lockout (UVLO) circuit. Use Value: ±5 % tolerance and AEC-Q101 qualification ensure functional safety compliance without external calibration. |
Use Scenario: Providing stable bias voltage to electrochemical gas sensing elements in handheld air quality meters. IC Role / Device Role / Timing Role: Low-leakage voltage reference for analog front-end amplifier biasing. Use Value: 0.05 µA max reverse current at 18.2 V extends battery life beyond 5 years in always-on configurations. |
| Industrial PLC Input Protection | Medical Wearable Reference |
Use Scenario: Clamping transient overvoltage on 24 V digital input channels of programmable logic controllers. IC Role / Device Role / Timing Role: Reverse-biased Zener clamp protecting downstream optocoupler inputs. Use Value: 40 W non-repetitive peak power rating (tp = 100 µs) absorbs IEC 61000-4-4 burst energy without failure. |
Use Scenario: Generating precision 24 V reference for low-noise ADC reference buffers in wearable vital sign monitors. IC Role / Device Role / Timing Role: Stable voltage source for ratiometric sensor excitation and signal conditioning. Use Value: +18.2 mV/K temperature coefficient enables predictable drift compensation in firmware calibration routines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C24 | ±5 % tolerance, same VZ range, but not AEC-Q101 qualified; Ptot = 300 mW | Lacks automotive qualification; suitable only for industrial/commercial grade systems | Select when AEC-Q101 is not required and higher power margin is needed |
| MMSZ5245B | ±5 % tolerance, VZ = 24 V at 20 mA, rdiff = 35 Ω, no AEC-Q101 qualification | Higher test current increases bias consumption; lower rdiff improves regulation but raises noise sensitivity | Select for tighter regulation in non-automotive, higher-current analog circuits |
Compared with BZX8450-C24-QVL, BZX84-C24 offers higher power headroom but no automotive qualification, while MMSZ5245B delivers superior regulation accuracy at the cost of 400× higher test current - making the QVL variant uniquely suited for low-power, AEC-compliant 24 V reference needs.
Availability
BZX8450-C24-QVL is available at Aetrix Electronics and suitable for automotive ECU design, portable sensor modules, industrial PLC input stages, and medical wearable instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZX8450-C24-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 technologies.
The BZX8450-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for low-current voltage reference and regulation in automotive and portable electronics where space, power, and qualification rigor are critical constraints.
FAQ
What is the exact Zener voltage range for BZX8450-C24-QVL at 50 µA?
The BZX8450-C24-QVL has a guaranteed working voltage range of 22.8 V to 25.2 V when measured at IZ = 50 µA and Tj = 25 °C, per Table 8 of the official Nexperia datasheet Rev. 3 (July 2024). This ±5 % tolerance band is validated across the full −55 °C to +150 °C junction temperature range.
Is Pin 2 truly unconnected, and what happens if it's grounded?
Yes, Pin 2 is internally not connected (n.c.) - confirmed in Table 2 "Pinning information" and Figure 9 "Package outline". Grounding or routing to any net introduces parasitic capacitance and potential leakage paths, degrading noise performance and violating the device's qualified AEC-Q101 layout requirements. It must remain electrically floating.
How does the "intentional minor rise of leakage current" improve noise reduction?
Per Application Note AN90031 cited in the datasheet, the controlled increase in IR near breakdown improves carrier recombination dynamics, reducing avalanche noise and enhancing transient response. This results in lower RMS noise in feedback loops and faster recovery after overvoltage events - critical for precision analog references.
Can BZX8450-C24-QVL replace BZX84-C24 in an existing automotive design?
Yes, but only after verifying thermal derating: BZX8450-C24-QVL has lower Ptot (250 mW vs. 300 mW) and higher Rth(j-a) (500 K/W vs. ~400 K/W). In high-ambient-temperature zones (e.g., under-hood), power dissipation must be limited to ≤ 150 mW to maintain Tj ≤ 150 °C - requiring layout review and possible heatsink adjustment.
BZX8450-C24-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):
- 24 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 70 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 18.2 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-C24-QVL FAQ
1.How can I place an order for BZX8450-C24-QVL through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-C24-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-C24-QVL reliable?
The price and inventory of BZX8450-C24-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-C24-QVL is usually 5 days.
3.What payment methods are accepted for BZX8450-C24-QVL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C24-QVL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-C24-QVL?
BZX8450-C24-QVL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-C24-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-C24-QVL?
For technical support, including BZX8450-C24-QVL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C24-QVL requirements.
6.How does Aetrix verify that BZX8450-C24-QVL is sourced from the original manufacturer or authorized distributors?
All BZX8450-C24-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-C24-QVL meets industry standards.
7.What is the process for return or replacement of BZX8450-C24-QVL?
All BZX8450-C24-QVL units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C24-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-C24-QVL part is unused and in its original packaging.
Return procedure for BZX8450-C24-QVL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-C24-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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