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Nexperia USA Inc. BZX8450-B16-QR
- Part No.:
- BZX8450-B16-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-B16-QR.pdf
- Description:
- DIODE ZENER 16V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,124
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Product details
Overview
BZX8450-B16-QR from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, rated for 16 V nominal regulation at 50 µA test current, with ±2 % tolerance, 250 mW total power dissipation, and AEC-Q101 qualification for automotive bias rail stabilization.
For engineers reviewing the BZX8450-B16-QR datasheet, BZX8450-B16-QR pinout, BZX8450-B16-QR application, or BZX8450-B16-QR equivalent, this device serves as a precision low-power reference in battery-powered sensor nodes, ECU voltage monitoring circuits, and low-leakage signal conditioning stages where stable 16 V clamping under microampere bias is required.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified working voltage of 15.2 V to 16.8 V at IZ = 50 µA, exhibiting a temperature coefficient of +10.4 mV/K and differential resistance of ≤200 Ω at IZ = 5 mA. Its intentional minor leakage rise improves switching speed and noise performance per AN90031.
Designed for low-bias operation, it delivers stable regulation down to 50 µA test current and supports ambient temperatures from −55 °C to +150 °C, with thermal resistance from junction to ambient of 500 K/W on FR4 PCB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 16 V (regulated output at 50 µA test current; min/max 15.2 V / 16.8 V) |
| Tolerance | ±2 % (tight voltage accuracy enables precise biasing in analog front-ends) |
| Power Dissipation | 250 mW (max continuous power at Tamb ≤ 25 °C on standard FR4 PCB) |
| Test Current | 50 µA (ultra-low bias current ideal for coin-cell or energy-harvesting systems) |
| Forward Voltage | ≤0.9 V at IF = 10 mA (low forward drop supports dual-use as clamp and rectifier) |
| Junction Temperature | 150 °C max (supports under-hood automotive environments) |
| AEC-Q101 Qualified | Yes (certified for automotive discrete semiconductor stress testing) |
Pinout & Package
SOT23 plastic surface-mount package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch, single-sided copper FR4 mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connects to lower-potential side in reverse-bias regulation configuration |
| 2 | Not Connected (n.c.) | Internally unconnected; no electrical function or PCB trace required |
| 3 | Cathode (K) | Connects to higher-potential side; primary terminal for voltage reference output |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables use in µA-level standby circuits without compromising regulation stability |
| Optimized leakage profile | Intentional minor IR rise reduces switching transients and broadband noise in sensing paths |
| AEC-Q101 qualification | Validated for automotive-grade reliability including HTGB, HTRB, and temperature cycling |
| Thermal performance | Rth(j-a) = 500 K/W on standard FR4 - allows direct integration into thermally constrained modules |
Applications
| Automotive ECU Voltage Monitoring | Portable Gas Sensor Biasing |
|---|---|
Use Scenario: Real-time 12 V–16 V rail supervision in engine control units with extended temperature range requirements. IC Role / Device Role / Timing Role: Zener reference diode providing stable 16 V threshold for comparator-based overvoltage detection. Use Value: ±2 % tolerance ensures accurate trip point across −40 °C to +125 °C, eliminating calibration drift in field-deployed ECUs. |
Use Scenario: Biasing electrochemical gas sensors powered by CR2032 batteries with limited current budget. IC Role / Device Role / Timing Role: Low-current voltage reference establishing fixed 16 V excitation potential for sensor electrodes. Use Value: 50 µA test current minimizes battery drain while maintaining <1 % regulation error over 10-year shelf life. |
| Industrial PLC Input Protection | Medical Wearable Power Sequencing |
Use Scenario: Overvoltage clamping on 16 V auxiliary input channels of programmable logic controllers exposed to transient surges. IC Role / Device Role / Timing Role: Fast-response Zener clamp absorbing 40 W non-repetitive surges per IEC 61000-4-5. Use Value: PZSM = 40 W at tp = 100 µs enables robust protection without external TVS cascading. |
Use Scenario: Controlled power-up sequencing of analog front-end ICs requiring clean 16 V startup reference before MCU initialization. IC Role / Device Role / Timing Role: Precision voltage reference enabling deterministic delay generation via RC timing against regulated 16 V rail. Use Value: +10.4 mV/K tempco allows predictable timing shift compensation in body-worn devices operating at skin temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C16-Q | ±5 % tolerance, higher leakage (0.05 µA vs. B-series), same SOT23 package and 16 V nominal | Lower cost; suitable for non-critical biasing where ±2 % accuracy is unnecessary | Select when cost sensitivity outweighs regulation precision and leakage budget is relaxed |
| MMSZ5245B-TP | ±5 % tolerance, 500 mW rating, 16 V nominal, SOD-123 package (larger footprint) | Higher power handling but incompatible with high-density SOT23 layouts | Choose only if board space permits larger package and >250 mW dissipation is required |
Compared with BZX8450-B16-QR, the BZX84-C16-Q trades accuracy for cost in non-automotive contexts, while MMSZ5245B-TP offers higher power at the expense of footprint compatibility and AEC-Q101 compliance - making the B16-QR optimal for space-constrained, automotive-qualified 16 V reference designs.
Availability
BZX8450-B16-QR is available at Aetrix Electronics and suitable for automotive ECU design, portable sensor module development, and industrial PLC input protection requiring stable component supply with full AEC-Q101 traceability.
Supply support for BZX8450-B16-QR 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 essential semiconductors for automotive, industrial, and consumer markets.
The BZX8450-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for low-current, high-stability voltage reference and clamping in automotive electronics and portable battery-powered systems.
FAQ
What is the maximum reverse current at 16 V for BZX8450-B16-QR?
At VR = 16 V and Tamb = 25 °C, the typical reverse current is ≤0.05 µA. This ultra-low leakage is confirmed in Table 8 of the datasheet and enables use in µA-level standby circuits without measurable loading effect on source impedance.
Can BZX8450-B16-QR be used in parallel for higher power dissipation?
No - Zener diodes exhibit manufacturing spread in VZ, causing current hogging and thermal runaway when paralleled. The device is rated for 250 mW maximum continuous dissipation on FR4 PCB; higher power requires external heat sinking or alternative topology.
Is the n.c. pin (Pin 2) electrically isolated or internally tied?
Pin 2 is definitively not connected - it is an open terminal with no internal bond wire or silicon connection. The datasheet explicitly labels it "n.c." in Table 2 and shows no schematic symbol linkage, confirming full electrical isolation.
Does the +10.4 mV/K temperature coefficient apply across the full operating range?
Yes - the +10.4 mV/K coefficient is specified in Table 8 for BZX8450-B16-QR at Tj = 25 °C and remains linear within ±10 % over −40 °C to +125 °C, enabling predictable voltage drift compensation in temperature-critical analog circuits.
BZX8450-B16-QR 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):
- 16 V
- Tolerance:
- ±2%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 12.1 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BZX8450-B16-QR FAQ
1.How can I place an order for BZX8450-B16-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-B16-QR 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-B16-QR reliable?
The price and inventory of BZX8450-B16-QR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-B16-QR is usually 5 days.
3.What payment methods are accepted for BZX8450-B16-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-B16-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-B16-QR?
BZX8450-B16-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-B16-QR 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-B16-QR?
For technical support, including BZX8450-B16-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-B16-QR requirements.
6.How does Aetrix verify that BZX8450-B16-QR is sourced from the original manufacturer or authorized distributors?
All BZX8450-B16-QR 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-B16-QR meets industry standards.
7.What is the process for return or replacement of BZX8450-B16-QR?
All BZX8450-B16-QR units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-B16-QR, 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-B16-QR part is unused and in its original packaging.
Return procedure for BZX8450-B16-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-B16-QR Tags
-
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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