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Nexperia USA Inc. BZX8450-B6V8R
- Part No.:
- BZX8450-B6V8R
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-B6V8R.pdf
- Description:
- DIODE ZENER 6.8V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,184
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Product details
Overview
BZX8450-B6V8R from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, designed for precision voltage reference and biasing in portable electronics. It delivers 6.66 V to 6.94 V nominal Zener voltage at IZ = 50 µA, with ±2 % tolerance, 80 Ω differential resistance at 5 mA, and 1.2 mV/K temperature coefficient. Used in battery-powered sensor signal conditioning circuits where low quiescent current and stable regulation under light load are critical.
For engineers reviewing the BZX8450-B6V8R datasheet, BZX8450-B6V8R pinout, BZX8450-B6V8R application, or BZX8450-B6V8R equivalent, this page provides verified electrical characteristics, thermal behavior, SOT23 terminal mapping, and direct alternatives for low-power voltage reference design.
Technical Context
This Zener diode operates in reverse breakdown mode with specified regulation at ultra-low test current (50 µA), enabling use in micro-power systems where traditional 5 mA Zeners would overload weak bias sources. Its intentional leakage profile supports fast switching and noise reduction per AN90031.
The device exhibits a positive temperature coefficient of +1.2 mV/K near 6.8 V, minimizing drift across −55 °C to +150 °C ambient range. Thermal resistance from junction to solder point is 330 K/W, confirming suitability for FR4 PCBs with standard single-sided copper footprints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.66 V to 6.94 V at IZ = 50 µA - defines precise regulation threshold for low-bias reference networks |
| Tolerance | ±2 % - ensures tight voltage accuracy without post-manufacturing trimming |
| Differential Resistance (rdiff) | 80 Ω at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Temperature Coefficient (SZ) | +1.2 mV/K - quantifies voltage drift per degree Celsius, critical for temperature-stable references |
| Forward Voltage (VF) | ≤ 0.9 V at IF = 10 mA - enables use as low-drop rectifier or clamp in dual-polarity bias schemes |
| Total Power Dissipation (Ptot) | 250 mW at Tamb ≤ 25 °C - sets maximum continuous power handling on standard FR4 PCB |
| Reverse Current (IR) | ≤ 5.1 µA at VR = 5.1 V - confirms low leakage below knee voltage, preserving battery life |
Pinout & Package
SOT23 plastic surface-mount package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch, 3-terminal configuration with exposed cathode tab for thermal conduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connected to lower-potential node; reverse-biased during regulation; carries minimal leakage current |
| 2 | Not Connected (n.c.) | Internally unconnected; must remain floating-no PCB trace or thermal pad attachment |
| 3 | Cathode (K) | Connected to regulated output node; serves as primary heat path via solder point; referenced in Rth(j-sp) = 330 K/W |
Key Features
| Feature | Design Value |
|---|---|
| Low-test-current regulation | Specified at 50 µA - enables stable reference generation from high-impedance sources like CMOS outputs or RC networks |
| Optimized leakage profile | Intentional minor rise per AN90031 - reduces switching transients and broadband noise in feedback paths |
| ±2 % voltage tolerance | Guaranteed over full temperature range - eliminates need for external trimming in cost-sensitive consumer designs |
| SOT23 footprint compatibility | Standard 1.9 mm pitch, 2.9 mm × 1.3 mm outline - supports automated placement and reflow without custom stencil adjustments |
| 150 °C max junction temperature | Enables operation in sealed enclosures or near heat-generating ICs without derating in most industrial environments |
Applications
| Portable Sensor Biasing | Microcontroller Reset Reference |
|---|---|
|
Use Scenario: Providing stable 6.8 V reference to op-amp input stages in battery-powered environmental sensors. IC Role / Device Role / Timing Role: Zener voltage reference establishing fixed bias point for analog front-end amplification. Use Value: 50 µA test current matches typical sensor ASIC standby current, avoiding loading-induced drift. |
Use Scenario: Generating clean reset threshold for low-power microcontrollers in wearables. IC Role / Device Role / Timing Role: Precision voltage threshold element in RC-based power-on reset circuitry. Use Value: ±2 % tolerance ensures deterministic reset assertion across temperature, eliminating firmware calibration. |
| Low-Power ADC Reference | LED Current Regulation |
|
Use Scenario: Supplying reference voltage to 12-bit SAR ADCs in energy-harvesting nodes. IC Role / Device Role / Timing Role: Low-drift voltage source for ADC internal reference buffer or external scaling network. Use Value: +1.2 mV/K coefficient aligns closely with typical ADC offset drift, improving system-level accuracy. |
Use Scenario: Setting constant current for indicator LEDs in handheld medical devices. IC Role / Device Role / Timing Role: Shunt regulator defining voltage drop across series current-limiting resistor. Use Value: 80 Ω rdiff ensures <1 % current variation across 3.0 V–4.2 V Li-ion battery range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5235B (ON Semiconductor) | 6.8 V nominal, ±5 % tolerance, 100 Ω rdiff at 20 mA, rated at 350 mW | Higher power rating but looser tolerance and higher test current (20 mA) - less suitable for sub-100 µA bias networks | Select when higher surge capability is needed and ±5 % accuracy is acceptable in cost-driven designs |
| BZX84-C6V8 (Nexperia) | Same SOT23 package, 6.46 V–7.14 V range, ±5 % tolerance, 100 Ω rdiff at 5 mA | Wider voltage spread and higher leakage above 6.8 V - trades precision for broader production yield and lower unit cost | Select when tighter voltage control is unnecessary and BOM simplification across multiple Zener voltages is prioritized |
Compared with BZX8450-B6V8R, MMBZ5235B offers higher power headroom but sacrifices low-current regulation fidelity, while BZX84-C6V8 shares packaging and manufacturer support but relaxes tolerance and leakage control for volume production flexibility.
Availability
BZX8450-B6V8R is available at Aetrix Electronics and suitable for portable sensor biasing, microcontroller reset reference, and low-power ADC reference requiring stable component supply across global production programs.
Supply support for BZX8450-B6V8R 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 leading semiconductor manufacturer specializing in high-performance, energy-efficient logic, analog, and discrete components for automotive, industrial, and consumer markets.
The BZX8450 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for battery-constrained applications demanding accurate, low-quiescent-voltage regulation without active circuitry.
FAQ
What is the maximum reverse voltage before breakdown for BZX8450-B6V8R?
The BZX8450-B6V8R begins controlled reverse breakdown between 6.66 V and 6.94 V at IZ = 50 µA. Below 5.1 V, reverse current remains ≤5.1 µA per datasheet Table 8. Operation below the knee voltage avoids regulation and maintains low leakage essential for battery longevity.
Can BZX8450-B6V8R be used in forward conduction mode?
Yes - its forward voltage is guaranteed ≤0.9 V at 10 mA, making it usable as a low-drop clamp or level shifter. However, the anode (Pin 1) and cathode (Pin 3) must be correctly oriented, and Pin 2 must remain unconnected; forward operation does not leverage its Zener regulation function.
Why does Pin 2 show 'n.c.' and what happens if it's grounded?
Pin 2 is internally unconnected per Table 2 and must remain electrically floating. Grounding or routing a trace to Pin 2 risks mechanical stress on the die bond wire, potential shorting, or thermal imbalance. The SOT23 outline (Fig. 9) confirms no internal connection exists at Terminal 2.
How does thermal resistance affect performance in compact PCB layouts?
With Rth(j-sp) = 330 K/W, a 100 mW dissipation raises junction temperature by ~33 °C above solder point. In dense layouts, limiting copper area around Pin 3 (cathode) increases local ambient temperature, requiring derating per Figure 1's non-repetitive surge curves to avoid exceeding 150 °C Tj.
BZX8450-B6V8R 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):
- 6.8 V
- Tolerance:
- ±2%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 5.1 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-B6V8R FAQ
1.How can I place an order for BZX8450-B6V8R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-B6V8R 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-B6V8R reliable?
The price and inventory of BZX8450-B6V8R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-B6V8R is usually 5 days.
3.What payment methods are accepted for BZX8450-B6V8R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-B6V8R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-B6V8R?
BZX8450-B6V8R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-B6V8R 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-B6V8R?
For technical support, including BZX8450-B6V8R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-B6V8R requirements.
6.How does Aetrix verify that BZX8450-B6V8R is sourced from the original manufacturer or authorized distributors?
All BZX8450-B6V8R 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-B6V8R meets industry standards.
7.What is the process for return or replacement of BZX8450-B6V8R?
All BZX8450-B6V8R units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-B6V8R, 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-B6V8R part is unused and in its original packaging.
Return procedure for BZX8450-B6V8R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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