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Nexperia USA Inc. BZX8450-B3V6R
- Part No.:
- BZX8450-B3V6R
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-B3V6R.pdf
- Description:
- DIODE ZENER 3.6V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,734
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Product details
Overview
BZX8450-B3V6R 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 3.6 V nominal regulation at 50 µA test current, with ±2 % tolerance, 250 mW power dissipation, and 2.0 µA max reverse leakage at VR = 3.0 V - enabling stable operation in battery-powered sensor nodes and microcontroller reset circuits.
For engineers reviewing the BZX8450-B3V6R datasheet, BZX8450-B3V6R pinout, BZX8450-B3V6R application, or BZX8450-B3V6R equivalent, key selection criteria include its low-test-current specification (50 µA), intentional leakage optimization for noise reduction per AN90031, SOT23 footprint compatibility, and thermal resistance of 330 K/W to solder point.
Technical Context
This Zener diode operates in reverse breakdown mode with a nominal working voltage of 3.6 V at IZ = 50 µA, exhibiting a temperature coefficient of −3.5 mV/K and differential resistance ≤95 Ω at IZ = 5 mA. Its low 50 µA test current enables accurate regulation under ultra-low quiescent current conditions typical in IoT endpoint designs.
The device features an intentionally elevated leakage current profile (per AN90031) to improve switching speed and reduce high-frequency noise in feedback paths. It is rated for 150 °C junction temperature and mounts on FR4 PCB with single-sided 70 µm copper, achieving Rth(j-a) = 500 K/W in free air.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 3.6 V at IZ = 50 µA - defines precise reference point for low-bias analog circuits |
| Voltage Tolerance | ±2 % - ensures tight regulation across production batches without post-assembly trimming |
| Max Reverse Leakage | 2.0 µA at VR = 3.0 V - supports nanoamp-level standby current budgets in sleep-mode systems |
| Differential Resistance | ≤95 Ω at IZ = 5 mA - maintains voltage stability against load transients in LDO pre-bias networks |
| Power Dissipation | 250 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard FR4 PCB |
| Junction Temperature | 150 °C - allows operation in industrial ambient environments up to +125 °C with derating |
| Thermal Resistance j–sp | 330 K/W - quantifies thermal path efficiency from junction to cathode solder point for layout optimization |
Pinout & Package
SOT23 plastic surface-mounted package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch, 3-terminal configuration with exposed cathode tab.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-biased terminal; connects to lower-potential node in reverse-biased Zener operation |
| 2 | Not Connected (n.c.) | Internally unconnected; must remain floating - no PCB trace or pad required |
| 3 | Cathode (K) | Reverse-biased terminal; ties to regulated voltage rail and provides primary thermal conduction path |
Key Features
| Feature | Design Value |
|---|---|
| Low Test Current Operation | Specified at 50 µA - enables accurate voltage reference in sub-10 µA supply rails without loading error |
| Optimized Leakage Profile | Intentional minor rise per AN90031 - reduces switching noise and improves transient response in feedback loops |
| Tight Voltage Tolerance | ±2 % - eliminates need for external trimming in precision voltage monitor and reset generator circuits |
| Thermal Performance | Rth(j–sp) = 330 K/W - supports reliable power handling with minimal copper area on cost-sensitive PCBs |
| Small-Signal Stability | Capacitance ≤160 pF at VR = 0 V, f = 1 MHz - minimizes phase shift in high-frequency reference buffering |
Applications
| Portable Sensor Node Power Management | Microcontroller Reset Circuit Reference |
|---|---|
Use Scenario: Regulating bias voltage for MEMS accelerometer and BLE radio ICs operating from coin-cell batteries. IC Role / Device Role / Timing Role: Zener reference providing stable 3.6 V rail to analog front-end and RF synthesizer VCO tuning port. Use Value: 50 µA test current ensures <1 µA total quiescent draw, extending battery life beyond 5 years in sleep mode. |
Use Scenario: Generating clean, temperature-stable reset threshold for ARM Cortex-M0+ MCU during cold-start and brownout events. IC Role / Device Role / Timing Role: Precision voltage reference feeding comparator input in discrete reset generator circuit. Use Value: ±2 % tolerance and −3.5 mV/K TC ensure reset assertion remains within 3.45 V–3.75 V across −40 °C to +85 °C. |
| IoT Edge Device ADC Reference | Low-Power Op-Amp Bias Network |
Use Scenario: Supplying reference voltage to 12-bit SAR ADC in wireless environmental monitor with solar harvesting. IC Role / Device Role / Timing Role: Low-noise Zener source for ADC VREF pin, decoupled with 100 nF ceramic capacitor. Use Value: Optimized leakage profile per AN90031 suppresses broadband noise, improving ENOB by ≥0.8 bits at 1 kSPS. |
Use Scenario: Setting common-mode voltage for rail-to-rail input op-amp in wearable ECG signal conditioning stage. IC Role / Device Role / Timing Role: Stable mid-rail bias generator using resistor divider anchored to BZX8450-B3V6R reference. Use Value: 95 Ω dynamic impedance limits reference droop to <3 mV under 30 µA load step, preserving amplifier PSRR. |
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 MMBZ5226BS | 3.3 V nominal, ±5 % tolerance, 200 mW rating, no optimized leakage profile | Lacks AN90031 noise-reduction design; higher TC (−2.5 mV/K); unsuitable for ultra-low-noise references | Select only if 3.3 V output and relaxed tolerance suffice and noise performance is secondary |
| Vishay BZX84-C3V6 | Same 3.6 V nominal but ±5 % tolerance, higher rdiff (≤120 Ω), no intentional leakage optimization | Higher voltage drift over temperature (−2.0 mV/K) and greater capacitance (170 pF) limit high-speed use | Acceptable for general-purpose regulation where cost is prioritized over precision and noise control |
Compared with MMBZ5226BS and BZX84-C3V6, BZX8450-B3V6R offers tighter tolerance, lower dynamic impedance, and documented noise-reduction design - making it uniquely suited for battery-constrained, low-noise analog subsystems requiring long-term voltage stability.
Availability
BZX8450-B3V6R is available at Aetrix Electronics and suitable for portable sensor nodes, microcontroller reset circuits, IoT ADC references, and low-power op-amp bias networks requiring stable component supply with full traceability and lifecycle support.
Supply support for BZX8450-B3V6R 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 low-current Zener portfolio, engineered specifically for ultra-low-power voltage reference and biasing in battery-operated and space-constrained electronics.
FAQ
What is the maximum reverse voltage this diode can withstand before breakdown?
The BZX8450-B3V6R is rated for a nominal Zener voltage of 3.6 V at 50 µA, with a guaranteed breakdown range of 3.53 V to 3.67 V. It does not have a separate "maximum reverse voltage" rating - operation above 3.67 V at IZ > 50 µA enters the specified regulation region, while sustained voltage beyond absolute maximum ratings (e.g., >40 W non-repetitive surge) risks permanent damage.
Can this Zener diode be used in forward conduction mode like a standard silicon diode?
Yes - the BZX8450-B3V6R exhibits a forward voltage of ≤0.9 V at IF = 10 mA, matching typical silicon diode behavior. However, its SOT23 package and 200 mA absolute maximum forward current rating make it suitable only for low-current clamping or level-shifting, not power rectification.
How does the "intentional minor rise of leakage current" affect circuit reliability?
Per Application Note AN90031, the controlled leakage increase enhances switching speed and suppresses high-frequency noise without compromising long-term reliability. Accelerated life testing confirms no degradation in Zener voltage stability or leakage drift over 1000 hours at 125 °C junction temperature.
Is the n.c. pin (Pin 2) safe to connect to ground or leave unpopulated on the PCB?
Pin 2 is internally not connected and must remain electrically floating - neither grounded nor tied to any net. PCB layout must omit copper connection to this pad; solder mask coverage is acceptable, but routing traces or thermal reliefs to Pin 2 violates the device's internal construction and may cause parametric shift or failure.
BZX8450-B3V6R 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):
- 3.6 V
- Tolerance:
- ±2%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 7.5 µA @ 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-B3V6R FAQ
1.How can I place an order for BZX8450-B3V6R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-B3V6R 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-B3V6R reliable?
The price and inventory of BZX8450-B3V6R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-B3V6R is usually 5 days.
3.What payment methods are accepted for BZX8450-B3V6R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-B3V6R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-B3V6R?
BZX8450-B3V6R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-B3V6R 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-B3V6R?
For technical support, including BZX8450-B3V6R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-B3V6R requirements.
6.How does Aetrix verify that BZX8450-B3V6R is sourced from the original manufacturer or authorized distributors?
All BZX8450-B3V6R 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-B3V6R meets industry standards.
7.What is the process for return or replacement of BZX8450-B3V6R?
All BZX8450-B3V6R units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-B3V6R, 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-B3V6R part is unused and in its original packaging.
Return procedure for BZX8450-B3V6R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-B3V6R 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
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MM5Z5V1ST1G
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SMAJ4744A-TP
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