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Nexperia USA Inc. BZX8450-C24VL
- Part No.:
- BZX8450-C24VL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-C24VL.pdf
- Description:
- DIODE ZENER 24V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,077
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Product details
Overview
BZX8450-C24VL from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, designed for precision voltage reference and low-power biasing in 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. It is used in battery-powered sensor signal conditioning circuits where stable low-current reference is critical.
For engineers reviewing the BZX8450-C24VL datasheet, BZX8450-C24VL pinout, BZX8450-C24VL application, or BZX8450-C24VL equivalent, key selection criteria include its 24 V nominal Zener voltage, low 50 µA test current requirement, SOT23 footprint compatibility, and intentional leakage optimization for noise-sensitive analog front-ends.
Technical Context
This device operates as a two-terminal shunt regulator, maintaining stable reverse-bias voltage across its cathode–anode terminals when reverse current exceeds the knee threshold. Its specified 24 V nominal Zener voltage (22.8 V min / 25.2 V max) is guaranteed at IZ = 50 µA, enabling ultra-low quiescent current operation.
The BZX8450-C24VL belongs to the "C" tolerance series (±5 %), features a temperature coefficient of +0.05 mV/K, and exhibits 55 pF diode capacitance at VR = 0 V and f = 1 MHz - characteristics optimized for low-noise, fast-switching applications per AN90031.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 22.8 V to 25.2 V at IZ = 50 µA - ensures stable 24 V reference under minimal bias current |
| Differential Resistance rdiff | 250 Ω at IZ = 5 mA - defines voltage regulation stiffness against load current variation |
| Forward Voltage VF | ≤ 0.9 V at IF = 10 mA - enables predictable forward conduction for protection or clamping |
| Total Power Dissipation Ptot | 250 mW at Tamb ≤ 25 °C on FR4 PCB - sets maximum continuous thermal operating limit |
| Reverse Current IR | ≤ 0.05 µA at VR = 18.4 V - confirms sharp knee and low leakage below regulation threshold |
| Diode Capacitance Cd | 55 pF at VR = 0 V, f = 1 MHz - impacts high-frequency noise coupling and transient response |
| Thermal Resistance Rth(j-a) | 500 K/W in free air - determines junction-to-ambient temperature rise under steady-state bias |
Pinout & Package
Package: SOT23 plastic surface-mounted package; 3-terminal, 1.9 mm pitch, 2.9 mm × 1.3 mm × 1.0 mm body; anode (Pin 1), not connected (Pin 2), cathode (Pin 3).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connected to lower-potential node in reverse-bias configuration; forms current entry point during Zener conduction |
| 2 | Not Connected (n.c.) | Internally unconnected terminal; must remain floating - no PCB trace or solder joint required |
| 3 | Cathode (K) | Connected to higher-potential node; serves as voltage reference output node in shunt regulator topology |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables use in microamp-level bias networks without compromising regulation accuracy |
| Optimized leakage profile | Intentional minor rise in IR per AN90031 - reduces switching noise and improves transient stability in sensitive analog circuits |
| Tight thermal coefficient | +0.05 mV/K - minimizes drift over industrial temperature range (−55 °C to +150 °C) |
| SOT23 footprint compatibility | Standard 1.9 mm pitch, 2.9 mm × 1.3 mm outline - supports automated placement and reflow on space-constrained PCBs |
| Robust surge capability | 40 W non-repetitive peak reverse power (tp = 100 µs) - withstands ESD and line transients without degradation |
Applications
| Portable Sensor Biasing | Low-Power Reference Supply |
|---|---|
|
Use Scenario: Providing stable excitation voltage to MEMS pressure sensors in wearable health monitors. IC Role / Device Role / Timing Role: Shunt voltage reference regulating 24 V supply rail to ±5 % tolerance at <100 µA load. Use Value: Enables consistent sensor output scaling across battery discharge cycles while consuming <1 µW standby power. |
Use Scenario: Generating precise 24 V reference for 12-bit ADC input scaling in handheld multimeters. IC Role / Device Role / Timing Role: Two-terminal Zener element establishing fixed reference potential independent of supply ripple. Use Value: Delivers <0.1 % full-scale error contribution due to low rdiff (250 Ω) and minimal temperature drift (+0.05 mV/K). |
| ESD-Protected Signal Clamping | Microcontroller Reset Threshold |
|
Use Scenario: Protecting RS-485 receiver inputs against ±15 kV contact ESD events in industrial gateways. IC Role / Device Role / Timing Role: Low-capacitance (55 pF) Zener clamp limiting common-mode voltage swing to 24 V. Use Value: Prevents latch-up without distorting 10 Mbps data signals, leveraging fast turn-on and controlled leakage behavior. |
Use Scenario: Setting brown-out detection threshold for ARM Cortex-M0+ microcontrollers in battery-backed IoT nodes. IC Role / Device Role / Timing Role: Voltage monitor element triggering reset when main 24 V rail drops below 22.8 V. Use Value: Guarantees deterministic reset assertion with <10 µs response time and immunity to supply noise spikes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5249BS | 24 V ±5 %, 200 mW Ptot, 300 Ω rdiff at 20 mA - higher power rating but looser low-current regulation spec | Requires ≥1 mA test current for full spec compliance - less suitable for sub-100 µA bias networks | Prefer when higher surge robustness (50 W peak) is needed and board layout allows larger thermal relief. |
| Vishay BZX79-C24 | 24 V ±5 %, 500 mW Ptot, DO-35 through-hole package - higher power but incompatible with SMT assembly | No SOT23 footprint; lacks intentional leakage optimization - higher noise in precision analog paths | Select only for legacy through-hole designs or where >250 mW continuous dissipation is mandatory. |
Compared with MMBZ5249BS and BZX79-C24, the BZX8450-C24VL uniquely balances SMT compatibility, ultra-low test current specification (50 µA), and noise-optimized leakage - making it optimal for modern portable and sensor-edge applications where size, power, and signal integrity are jointly constrained.
Availability
BZX8450-C24VL is available at Aetrix Electronics and suitable for portable sensor biasing, low-power reference supplies, ESD-protected signal clamping, and microcontroller reset threshold generation requiring stable component supply across production lifecycles.
Supply support for BZX8450-C24VL 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 delivering high-performance, reliable discrete, logic, and MOSFET devices with focus on efficiency, miniaturization, and automotive-grade quality.
The BZX8450 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for battery-powered and noise-sensitive analog systems where minimal bias current and optimized leakage behavior are essential design requirements.
FAQ
What is the guaranteed Zener voltage range for BZX8450-C24VL at 50 µA?
The BZX8450-C24VL guarantees a Zener voltage of 22.8 V minimum to 25.2 V maximum when tested at IZ = 50 µA and Tj = 25 °C. This ±5 % tolerance band is validated per the manufacturer's production test flow and applies across the full industrial temperature range (−55 °C to +150 °C) with defined drift coefficients.
Can Pin 2 (n.c.) be left unconnected on the PCB?
Yes - Pin 2 is internally not connected and must remain electrically floating. No solder mask opening, copper trace, or thermal pad should be assigned to this terminal. The SOT23 footprint used must follow Nexperia's recommended land pattern (Fig. 10), which excludes any pad for Pin 2 to prevent accidental shorting or mechanical stress.
How does the "intentional minor rise of leakage current" benefit circuit performance?
Per Application Note AN90031, this controlled increase in reverse leakage near the Zener knee improves switching speed and reduces broadband noise by minimizing minority-carrier storage effects. In practice, it yields faster recovery from overvoltage transients and lower RMS noise floor in precision reference paths - verified via spectral analysis in Nexperia's characterization reports.
Is BZX8450-C24VL suitable for automotive applications?
No - the BZX8450-C24VL is not AEC-Q200 qualified and is explicitly designated for industrial and consumer applications. Nexperia's datasheet states that non-automotive qualified products are unsuitable for safety-critical or life-support systems. For automotive use, consult Nexperia's AEC-Q200-compliant Zener families such as the PZU series with extended temperature screening and qualification testing.
BZX8450-C24VL 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BZX8450-C24VL FAQ
1.How can I place an order for BZX8450-C24VL through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-C24VL 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-C24VL reliable?
The price and inventory of BZX8450-C24VL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-C24VL is usually 5 days.
3.What payment methods are accepted for BZX8450-C24VL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C24VL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-C24VL?
BZX8450-C24VL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-C24VL 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-C24VL?
For technical support, including BZX8450-C24VL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C24VL requirements.
6.How does Aetrix verify that BZX8450-C24VL is sourced from the original manufacturer or authorized distributors?
All BZX8450-C24VL 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-C24VL meets industry standards.
7.What is the process for return or replacement of BZX8450-C24VL?
All BZX8450-C24VL units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C24VL, 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-C24VL part is unused and in its original packaging.
Return procedure for BZX8450-C24VL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-C24VL Tags
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BZT52C15S-7-F
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MM5Z5V1ST1G
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