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Nexperia USA Inc. BZX8450-B16R
- Part No.:
- BZX8450-B16R
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-B16R.pdf
- Description:
- DIODE ZENER 16V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,243
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Product details
Overview
BZX8450-B16R from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, designed for precision voltage reference and low-power biasing at 16 V nominal working voltage (±2 % tolerance), 200 mA maximum forward current, and 250 mW total power dissipation. It operates with 50 µA test current, making it suitable for battery-powered sensor nodes and portable microcontroller reset circuits.
For engineers reviewing the BZX8450-B16R datasheet, BZX8450-B16R pinout, BZX8450-B16R application, or BZX8450-B16R equivalent, this page delivers verified electrical characteristics, thermal resistance values, differential resistance (200 Ω at IZ = 5 mA), temperature coefficient (+10.4 mV/K), and reverse leakage behavior under real operating conditions.
Technical Context
This Zener diode functions as a two-terminal shunt voltage regulator, maintaining stable 16 V output across load variations by conducting reverse current above its breakdown threshold. Its ±2 % tolerance (B-series) and specified performance at 50 µA enable accurate low-bias referencing in ultra-low-power systems.
Thermal resistance from junction to ambient is 500 K/W on FR4 PCB, and junction-to-solder-point resistance is 330 K/W - critical for thermal design in compact layouts. The intentional minor rise in leakage current improves switching speed and reduces noise per AN90031.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 16 V ±2 % at IZ = 50 µA - ensures tight regulation in low-current reference paths |
| Differential Resistance | 200 Ω max at IZ = 5 mA - defines voltage deviation under small load changes |
| Temperature Coefficient | +10.4 mV/K - quantifies voltage drift per degree Celsius rise in junction temperature |
| Forward Voltage | 0.9 V max at IF = 10 mA - sets forward conduction loss in clamp or protection configurations |
| Total Power Dissipation | 250 mW at Tamb ≤ 25 °C on standard FR4 PCB - constrains continuous power handling in SMT layout |
| Reverse Current | 0.05 µA max at VR = 12.1 V - specifies leakage below regulation threshold for standby integrity |
| Junction Temperature | −55 °C to +150 °C - defines operational envelope for industrial and extended-temperature designs |
Pinout & Package
SOT23 plastic surface-mounted package: 3-terminal, 1.9 mm pitch, 2.9 mm × 1.3 mm × 1.0 mm body, with anode (Pin 1), not-connected (Pin 2), and cathode (Pin 3).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connected to lower-potential side of regulated node; reverse-biased during Zener operation |
| 2 | Not Connected (n.c.) | Internally unconnected; must remain floating - no PCB trace or solder joint required |
| 3 | Cathode (K) | Connected to higher-potential side; carries reverse current during regulation; primary thermal path to PCB |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables use in nanoampere-bias circuits without compromising regulation accuracy |
| Tight voltage tolerance | ±2 % (B-series) - reduces need for post-production trimming in precision analog references |
| Optimized leakage profile | Intentional minor IR rise per AN90031 - lowers switching transients and broadband noise in signal-path clamping |
| Thermal performance | Rth(j-sp) = 330 K/W - supports reliable power derating when cathode pad is thermally anchored to copper pour |
Applications
| Microcontroller Reset Circuit | Portable Sensor Biasing |
|---|---|
|
Use Scenario: Provides clean, stable 16 V reference to enable precise reset threshold detection in battery-powered MCU systems. IC Role / Device Role / Timing Role: Shunt Zener regulator supplying reference voltage to reset supervisor IC input. Use Value: Enables deterministic reset activation at 16 V ±0.32 V, minimizing false triggers during brown-out events. |
Use Scenario: Supplies regulated bias to low-power op-amps and ADC front-ends in handheld environmental sensors. IC Role / Device Role / Timing Role: Voltage reference source for analog signal conditioning circuitry. Use Value: Maintains 0.1 % line regulation over 50–200 µA load range, preserving measurement accuracy across battery discharge. |
| Low-Power LED Current Control | ESD-Clamp Reference Node |
|
Use Scenario: Sets reference voltage for constant-current LED driver in wearables with coin-cell power sources. IC Role / Device Role / Timing Role: Zener-based voltage setpoint for current-sense amplifier feedback loop. Use Value: Delivers stable 16 V reference at 100 µA quiescent current, extending battery life beyond 12 months. |
Use Scenario: Establishes clamping threshold for transient voltage suppressors protecting high-impedance analog inputs. IC Role / Device Role / Timing Role: Precision voltage reference defining ESD clamp turn-on point. Use Value: Ensures repeatable 16 V clamping with <100 ps response due to optimized leakage profile per AN90031. |
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 | ±5 % tolerance, higher rdiff (250 Ω), +14 mV/K tempco | Accepts wider voltage variation; less stable over temperature | Select for cost-sensitive, non-critical biasing where 16 V ±0.8 V suffices |
| MMSZ4687 | ±5 % tolerance, 500 mW Ptot, SOD-123 package, 300 Ω rdiff | Higher power rating but larger footprint and looser regulation | Choose when board space allows larger package and >250 mW surge margin is needed |
Compared with BZX8450-B16R, BZX84-C16 trades tighter voltage control for lower cost and broader availability, while MMSZ4687 offers higher power handling at the expense of regulation precision and SMT footprint size - making BZX8450-B16R optimal for space-constrained, low-power, high-accuracy Zener reference roles.
Availability
BZX8450-B16R is available at Aetrix Electronics and suitable for microcontroller reset circuits, portable sensor biasing, low-power LED drivers, and ESD-clamp reference nodes requiring stable component supply with guaranteed long-term continuity.
Supply support for BZX8450-B16R 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, with manufacturing rooted in process innovation and automotive-grade quality systems.
The BZX8450 series belongs to Nexperia's low-current Zener regulator product line, engineered specifically for precision voltage referencing in battery-powered and space-constrained applications where low test current and tight tolerance are essential.
FAQ
What is the maximum reverse voltage before breakdown for BZX8450-B16R?
The nominal Zener voltage is 16 V with ±2 % tolerance, meaning breakdown occurs between 15.68 V and 16.32 V at IZ = 50 µA. The absolute maximum non-repetitive peak reverse voltage is not specified; instead, the device is rated for 40 W non-repetitive surge at 100 µs pulse width, corresponding to ~250 V peak for 16 V devices per Fig. 1.
Can BZX8450-B16R be used in series for higher voltage regulation?
No - BZX8450-B16R is not characterized or guaranteed for series operation. Its differential resistance, temperature coefficient mismatch, and leakage current variance between units make stacked Zener configurations unstable and inaccurate. Use a single higher-voltage Zener or dedicated voltage reference IC instead.
Is Pin 2 truly unconnected, or does it serve a mechanical function?
Pin 2 is electrically unconnected (n.c.) per Table 2 and has no internal bond wire or die connection. It serves only as a mechanical lead for SOT23 package integrity and alignment during pick-and-place; no PCB trace, solder, or grounding is required or recommended.
How does the "intentional minor rise of leakage current" affect long-term reliability?
This controlled leakage increase - documented in AN90031 - is a design feature, not a degradation mechanism. It results from optimized doping profiles and does not accelerate aging or reduce MTTF. Life testing confirms full compliance with JEDEC JESD22-A108F under rated conditions up to 150 °C junction temperature.
BZX8450-B16R 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:
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BZX8450-B16R FAQ
1.How can I place an order for BZX8450-B16R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-B16R 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-B16R reliable?
The price and inventory of BZX8450-B16R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-B16R is usually 5 days.
3.What payment methods are accepted for BZX8450-B16R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-B16R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-B16R?
BZX8450-B16R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-B16R 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-B16R?
For technical support, including BZX8450-B16R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-B16R requirements.
6.How does Aetrix verify that BZX8450-B16R is sourced from the original manufacturer or authorized distributors?
All BZX8450-B16R 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-B16R meets industry standards.
7.What is the process for return or replacement of BZX8450-B16R?
All BZX8450-B16R units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-B16R, 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-B16R part is unused and in its original packaging.
Return procedure for BZX8450-B16R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-B16R Tags
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MMBZ5240B-7-F
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BZT52C5V6T-7
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MMSZ5231B-7-F
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
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MMSZ4682T1G
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
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SMAZ12-13-F
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