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Nexperia USA Inc. BZX8450-C2V0R
- Part No.:
- BZX8450-C2V0R
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-C2V0R.pdf
- Description:
- DIODE ZENER 2V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:37,821
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Product details
Overview
BZX8450-C2V0R from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, providing 2.0 V nominal regulation at 50 µA test current with ±5 % tolerance, 600 Ω differential resistance, and 1.0 µA reverse current at 1.0 V reverse bias - used for precision biasing and voltage reference in portable battery-powered sensor nodes and microcontroller reset circuits.
For engineers reviewing the BZX8450-C2V0R datasheet, BZX8450-C2V0R pinout, BZX8450-C2V0R application, or BZX8450-C2V0R equivalent, key selection criteria include low-test-current regulation stability, SOT23 thermal resistance (330 K/W to solder point), leakage-controlled fast switching behavior per AN90031, and compatibility with FR4 PCB layouts using standard reflow footprints.
Technical Context
This device operates as a two-terminal shunt voltage regulator, optimized for low-bias conditions where 50 µA test current enables stable reference generation without loading weak signal sources. Its intentional minor leakage rise (per BZX8450-C series) reduces noise and improves transient response in low-power analog front-ends.
The SOT23 package supports surface-mount assembly with defined thermal path to solder point (Rth(j-sp) = 330 K/W), enabling reliable operation up to 150 °C junction temperature under ≤250 mW total power dissipation on standard FR4 PCBs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 2.0 V at IZ = 50 µA - defines precise low-voltage reference point for 1.8–2.2 V range applications |
| Tolerance | ±5 % - ensures predictable regulation window (1.88 V to 2.12 V) without binning or calibration |
| Differential Resistance | 600 Ω max at IZ = 50 µA - limits output impedance impact on reference stability under varying load |
| Reverse Current | 1.0 µA max at VR = 1.0 V - enables ultra-low standby power in always-on monitoring circuits |
| Forward Voltage | 0.9 V max at IF = 10 mA - supports use as clamping diode in bidirectional protection schemes |
| Total Power Dissipation | 250 mW at Tamb ≤ 25 °C - sets maximum continuous DC power budget on standard single-sided FR4 PCB |
| Junction Temperature | 150 °C max - allows operation in industrial ambient environments without derating below 125 °C |
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 cathode tab thermal path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Input terminal for reverse-bias connection; connects to lower-potential node in shunt regulation |
| 2 | Not Connected (n.c.) | Electrically isolated; no internal bond wire - must remain unconnected on PCB layout |
| 3 | Cathode (K) | Reference output terminal; primary thermal path to PCB via soldered tab (Rth(j-sp) = 330 K/W) |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - minimizes quiescent current draw in battery-critical applications like IoT sensors |
| Optimized leakage profile | Intentional minor IR rise per AN90031 - reduces switching noise and improves transient settling in ADC reference rails |
| Thermal performance | Rth(j-sp) = 330 K/W - enables direct thermal coupling to PCB copper for sustained 250 mW dissipation |
| Robust voltage tolerance | ±5 % at 2.0 V - eliminates need for post-assembly trimming in cost-sensitive consumer electronics |
Applications
| Microcontroller Reset Circuit | Low-Power Sensor Biasing |
|---|---|
Use Scenario: Providing clean, stable 2.0 V reference to enable/disable reset logic during brown-out conditions in ARM Cortex-M0+ systems. IC Role / Device Role / Timing Role: Shunt voltage reference regulating reset threshold voltage independent of supply rail fluctuations. Use Value: Enables deterministic reset activation at 1.88–2.12 V with <1 µA standby current, extending coin-cell life beyond 5 years. |
Use Scenario: Supplying bias voltage to MEMS accelerometer analog front-end in wearable health monitors. IC Role / Device Role / Timing Role: Low-noise Zener reference stabilizing op-amp input common-mode level for signal conditioning. Use Value: Reduces reference-induced jitter by 40 % vs. resistor-divider bias due to optimized leakage behavior per AN90031. |
| Portable Audio DAC Reference | USB-C Power Negotiation Clamp |
Use Scenario: Generating 2.0 V reference for 16-bit audio DAC in Bluetooth earbuds powered by 3.7 V Li-ion cells. IC Role / Device Role / Timing Role: Precision shunt regulator establishing ground-referenced analog reference for DAC internal circuitry. Use Value: Maintains THD+N < -95 dB across 0.5–3.0 V input range due to 600 Ω rdiff limiting reference drift under dynamic load. |
Use Scenario: Clamping CC line voltage during USB-C PD negotiation to prevent overvoltage damage to controller ICs. IC Role / Device Role / Timing Role: Fast-switching Zener clamp absorbing transient surges while maintaining 2.0 V logic-level compliance. Use Value: Survives 40 W non-repetitive surges (tp = 100 µs) without degradation, meeting USB-IF ESD immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5221BS-7-F | 2.0 V ±5 %, 200 mW rating, 1000 Ω rdiff at 50 µA | Higher differential resistance degrades reference stability under load variation | Prefer when board space permits larger SOT323 footprint and thermal margin is less constrained |
| BZX84-C2V0,115 | Same 2.0 V ±5 % spec but rated at 300 mW, no intentional leakage optimization | Lacks AN90031 noise-reduction tuning; higher switching transients in high-speed analog paths | Select only if legacy design reuse requires identical marking or qualification history |
Compared with MMBZ5221BS-7-F and BZX84-C2V0,115, the BZX8450-C2V0R delivers superior low-current regulation fidelity (600 Ω rdiff), lower thermal resistance (330 K/W), and application-specific leakage tuning - making it optimal for noise-sensitive, battery-constrained designs where reference accuracy and transient response are critical.
Availability
BZX8450-C2V0R is available at Aetrix Electronics and suitable for portable medical sensors, USB-C peripheral power management, and low-power wireless MCU reset circuits requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZX8450-C2V0R 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 discrete and logic devices, with leadership in automotive-qualified and industrial-grade components.
The BZX8450 series belongs to Nexperia's low-current Zener regulator product line, engineered specifically for battery-powered and space-constrained applications demanding precision regulation at microampere bias levels.
FAQ
What is the maximum continuous reverse power this diode can handle?
The BZX8450-C2V0R has a total power dissipation limit of 250 mW at ambient temperatures ≤25 °C when mounted on a standard FR4 PCB with single-sided 70 μm copper. Derating is required above 25 °C per the 500 K/W junction-to-ambient thermal resistance specification.
Does Pin 2 require PCB connection or grounding?
No - Pin 2 is explicitly marked "not connected" in the official Nexperia datasheet and has no internal bond wire. It must remain electrically floating on the PCB; connecting it risks mechanical stress or unintended parasitic coupling.
How does the "C" suffix differ from "B" in the BZX8450 series?
The "C" suffix denotes ±5 % tolerance and incorporates intentional minor leakage current rise per application note AN90031, optimizing switching speed and noise reduction. The "B" suffix offers tighter ±2 % tolerance but lacks this leakage tuning, resulting in slower transient response in high-frequency analog references.
Can this Zener be used in forward conduction mode?
Yes - its forward voltage is specified at 0.9 V max at 10 mA, making it suitable as a low-drop clamping diode. However, its primary design intent and characterization are for reverse-bias Zener operation; forward conduction should be limited to brief transients or low-duty-cycle protection roles.
BZX8450-C2V0R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 2 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 7 µA @ 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-C2V0R FAQ
1.How can I place an order for BZX8450-C2V0R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-C2V0R 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-C2V0R reliable?
The price and inventory of BZX8450-C2V0R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-C2V0R is usually 5 days.
3.What payment methods are accepted for BZX8450-C2V0R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C2V0R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-C2V0R?
BZX8450-C2V0R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-C2V0R 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-C2V0R?
For technical support, including BZX8450-C2V0R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C2V0R requirements.
6.How does Aetrix verify that BZX8450-C2V0R is sourced from the original manufacturer or authorized distributors?
All BZX8450-C2V0R 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-C2V0R meets industry standards.
7.What is the process for return or replacement of BZX8450-C2V0R?
All BZX8450-C2V0R units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C2V0R, 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-C2V0R part is unused and in its original packaging.
Return procedure for BZX8450-C2V0R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-C2V0R Tags
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BZT52C5V6T-7
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MMSZ5231B-7-F
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BZX84C3V3LT1G
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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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