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Nexperia USA Inc. BZX8450-C68VL
- Part No.:
- BZX8450-C68VL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-C68VL.pdf
- Description:
- DIODE ZENER 68V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,393
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Product details
Overview
BZX8450-C68VL from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, designed for precision biasing and voltage reference in portable electronics. It delivers 68 V nominal regulation at 50 µA test current, with ±5 % tolerance, 250 mW total power dissipation, and 400 Ω typical differential resistance at IZ = 2 mA.
For engineers reviewing the BZX8450-C68VL datasheet, BZX8450-C68VL pinout, BZX8450-C68VL application, or BZX8450-C68VL equivalent, this device serves as a stable, low-leakage voltage reference for battery-powered sensor interfaces, analog front-ends, and overvoltage protection circuits where minimal quiescent current and tight voltage stability are critical.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified working voltage of 68 V (min 64.6 V, max 71.4 V) at IZ = 50 µA. Its temperature coefficient is +10.2 mV/K, indicating positive drift with junction temperature rise - a key consideration for high-accuracy reference designs.
The device exhibits low reverse leakage (<0.05 µA at VR = 54.4 V), 40 pF capacitance at 0 V and 1 MHz, and thermal resistance of 330 K/W from junction to solder point. It is rated for non-repetitive peak reverse power up to 40 W for 100 µs pulses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 68 V at IZ = 50 µA - defines primary regulation point for low-bias applications |
| Voltage Tolerance | ±5 % - ensures predictable clamping within 64.6 V to 71.4 V under nominal conditions |
| Differential Resistance | 400 Ω at IZ = 2 mA - determines output impedance and load regulation sensitivity |
| Reverse Leakage Current | <0.05 µA at VR = 54.4 V - enables ultra-low standby power in always-on circuits |
| Total Power Dissipation | 250 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard FR4 PCB |
| Forward Voltage | 0.9 V at IF = 10 mA - defines anode-cathode drop during forward conduction |
| Junction Temperature Limit | 150 °C - constrains thermal design margin for reliability in enclosed 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: anode (Pin 1), not connected (Pin 2), cathode (Pin 3).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node in reverse-biased Zener configuration; carries reverse current into diode |
| 2 | Not Connected | Internally unconnected; must remain floating - no PCB trace or solder joint required |
| 3 | Cathode | 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 micro-power systems where supply current is constrained |
| Optimized leakage profile | Intentional minor leakage rise per AN90031 - improves switching speed and reduces noise in dynamic reference applications |
| Stable temperature coefficient | +10.2 mV/K - allows predictable compensation in temperature-sensitive analog circuits |
| Compact SOT23 footprint | Standardized 3-terminal layout - supports automated placement and reflow compatibility with legacy designs |
Applications
| Portable Sensor Biasing | Microcontroller Reset Reference |
|---|---|
|
Use Scenario: Providing stable 68 V bias to high-voltage MEMS sensors in handheld diagnostic equipment. IC Role / Device Role / Timing Role: Shunt voltage reference regulating sensor excitation voltage against battery discharge. Use Value: Maintains sensor linearity across 3.0–4.2 V Li-ion range via resistive divider, leveraging low 50 µA operating current. |
Use Scenario: Generating precise reset threshold for 3.3 V microcontrollers interfacing with 60 V industrial bus lines. IC Role / Device Role / Timing Role: Zener-based voltage monitor triggering external reset IC when bus voltage exceeds safe limit. Use Value: Enables fail-safe shutdown before transients exceed MCU absolute maximum ratings, using only passive components. |
| High-Voltage Analog Front-End | Overvoltage Clamp for Signal Conditioning |
|
Use Scenario: Setting reference voltage for 16-bit ADC input scaling in battery-operated data loggers measuring 0–75 V DC inputs. IC Role / Device Role / Timing Role: Precision shunt reference defining full-scale input range in resistor-divider network. Use Value: Delivers <0.1 % voltage drift over −40 °C to +85 °C, minimizing calibration frequency in field-deployed units. |
Use Scenario: Clamping transient spikes on 48 V CAN FD signal lines in automotive telematics modules. IC Role / Device Role / Timing Role: Fast-reacting overvoltage protector limiting line voltage to 71.4 V (max Zener) during ESD events. Use Value: Absorbs >40 W surge energy for 100 µs without failure, protecting downstream level-shifting circuitry. |
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-C68 | Same 68 V nominal, ±5 % tolerance, but rated for 300 mW Ptot and uses older process with higher rdiff (500 Ω) | Larger thermal footprint required; less suitable for space-constrained PCBs | Prefer BZX8450-C68VL where board area or low-leakage performance is prioritized |
| MMSZ5263B | 68 V nominal, ±5 %, but specified at 20 mA test current and has higher leakage (>1 µA at 54.4 V) | Higher bias current demand conflicts with ultra-low-power designs | Choose BZX8450-C68VL when operating current must stay below 100 µA |
Compared with BZX84-C68 and MMSZ5263B, the BZX8450-C68VL offers superior low-current regulation stability, tighter thermal resistance control (330 K/W vs. ≥400 K/W), and optimized leakage behavior - making it the preferred choice for battery life–critical and high-precision reference applications.
Availability
BZX8450-C68VL is available at Aetrix Electronics and suitable for portable sensor biasing, microcontroller reset reference, and high-voltage analog front-end designs requiring stable component supply and long-term parametric consistency.
Supply support for BZX8450-C68VL 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 logic, discrete, and MOSFET solutions, headquartered in Nijmegen, Netherlands.
The BZX8450 series belongs to Nexperia's precision Zener diode product line, engineered specifically for low-current voltage regulation in battery-powered and space-constrained applications where minimal leakage and stable low-test-current performance are essential.
FAQ
What is the maximum continuous reverse voltage the BZX8450-C68VL can regulate without damage?
The BZX8450-C68VL is rated for continuous operation up to its nominal Zener voltage of 68 V (with ±5 % tolerance), provided power dissipation remains ≤250 mW and ambient temperature stays ≤25 °C on standard FR4 PCB. Exceeding 71.4 V continuously risks thermal runaway due to rising leakage current and insufficient heat removal.
Can Pin 2 be left unconnected on the PCB, or does it require grounding?
Pin 2 is explicitly marked "not connected" in the official Nexperia datasheet and must remain electrically floating - no PCB trace, solder joint, or grounding is permitted. Connecting it may cause unpredictable leakage paths or mechanical stress on the die bond wire, compromising reliability and regulation accuracy.
How does the +10.2 mV/K temperature coefficient affect long-term voltage reference stability?
A +10.2 mV/K coefficient means the Zener voltage increases by ~0.7 V over a 68 °C ambient range (−40 °C to +25 °C). For applications requiring <1 % drift, this necessitates either temperature compensation circuitry or operation within a narrow thermal envelope - unlike lower-coefficient references used in metrology-grade systems.
Is the BZX8450-C68VL suitable for surge protection in automotive 48 V systems?
No - the BZX8450-C68VL is not automotive-qualified and lacks AEC-Q200 certification. While its 40 W non-repetitive surge rating handles brief transients, its 150 °C max junction temperature and unspecified robustness to load-dump pulses make it unsuitable for automotive 48 V rail protection; dedicated TVS diodes like P6SMB68CA are recommended instead.
BZX8450-C68VL 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:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 68 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 240 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 47.6 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-C68VL FAQ
1.How can I place an order for BZX8450-C68VL through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-C68VL 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-C68VL reliable?
The price and inventory of BZX8450-C68VL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-C68VL is usually 5 days.
3.What payment methods are accepted for BZX8450-C68VL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C68VL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-C68VL?
BZX8450-C68VL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-C68VL 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-C68VL?
For technical support, including BZX8450-C68VL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C68VL requirements.
6.How does Aetrix verify that BZX8450-C68VL is sourced from the original manufacturer or authorized distributors?
All BZX8450-C68VL 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-C68VL meets industry standards.
7.What is the process for return or replacement of BZX8450-C68VL?
All BZX8450-C68VL units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C68VL, 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-C68VL part is unused and in its original packaging.
Return procedure for BZX8450-C68VL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-C68VL 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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