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Nexperia USA Inc. BZX8450-B2V2R
- Part No.:
- BZX8450-B2V2R
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-B2V2R.pdf
- Description:
- DIODE ZENER 2.2V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,790
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Product details
Overview
BZX8450-B2V2R from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, designed for precision voltage reference and biasing in ultra-low-power circuits; nominal Zener voltage 2.2 V (±2 % tolerance), specified at 50 μA test current, with forward voltage ≤0.9 V at 10 mA, and total power dissipation up to 250 mW - deployed in portable battery-powered sensor nodes and microcontroller reset circuitry.
For engineers reviewing the BZX8450-B2V2R datasheet, BZX8450-B2V2R pinout, BZX8450-B2V2R application, or BZX8450-B2V2R equivalent, this page delivers verified electrical parameters, terminal mapping, thermal behavior, and real-world use context for low-bias analog regulation and voltage clamping in space-constrained designs.
Technical Context
This device operates as a two-terminal shunt regulator, maintaining stable reverse breakdown at 2.2 V with differential resistance ≤600 Ω at IZ = 50 μA and ≤100 Ω at IZ = 1 mA. Its temperature coefficient is −3.5 mV/K, enabling predictable drift compensation in ambient-variant environments.
The SOT23 package features an isolated cathode (Pin 3), anode (Pin 1), and non-connected terminal (Pin 2), supporting minimal PCB footprint while delivering Rth(j-a) = 500 K/W in free air and Rth(j-sp) = 330 K/W to solder point - critical for thermal management in unheatsinked layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 2.2 V ±2 % at IZ = 50 μA - ensures tight regulation for reference-sensitive analog stages |
| Forward Voltage VF | ≤0.9 V at IF = 10 mA - enables low-loss forward conduction in dual-direction protection schemes |
| Total Power Dissipation Ptot | 250 mW at Tamb ≤25 °C on FR4 PCB - defines maximum continuous DC or pulsed power handling |
| Differential Resistance rdiff | ≤600 Ω at IZ = 50 μA; ≤100 Ω at IZ = 1 mA - determines output impedance and load regulation sensitivity |
| Reverse Current IR | ≤1.0 μA at VR = 1.0 V - confirms low leakage for battery-critical standby modes |
| Temperature Coefficient SZ | −3.5 mV/K - quantifies voltage drift per degree Celsius for thermal error budgeting |
| Junction Temperature Tj | −55 °C to +150 °C - specifies operational envelope for industrial and extended-temperature deployments |
Pinout & Package
SOT23 plastic surface-mount package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm lead pitch, 3-terminal configuration with standard footprint per Figure 9 and reflow/wave soldering land patterns in Figures 10–11.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward current entry point; connected to lower-potential node in Zener bias configuration |
| 2 | Not Connected (n.c.) | Internally unconnected; must remain floating - no PCB trace or copper pour should attach |
| 3 | Cathode (K) | Reverse-bias terminal; tied to regulated voltage node and current-limiting resistor in shunt topology |
Key Features
| Feature | Design Value |
|---|---|
| Low test current specification | Rated at 50 μA - enables stable regulation in nanoamp-level bias networks without loading sensitive sources |
| Tight voltage tolerance | ±2 % (B-series) - reduces calibration overhead in precision reference chains and ADC front-ends |
| Optimized leakage profile | Intentional minor rise in IR supports fast switching transients and reduced noise in signal-path clamping |
| Thermal performance | Rth(j-sp) = 330 K/W - allows direct thermal coupling to PCB copper for passive heat extraction without heatsinks |
Applications
| Microcontroller Reset Circuit | Portable Sensor Biasing |
|---|---|
|
Use Scenario: Providing clean, temperature-stable reset threshold for ARM Cortex-M0+ MCUs in wearable health monitors. IC Role / Device Role / Timing Role: Shunt Zener reference generating precise 2.2 V trip point for external reset supervisor IC input. Use Value: Enables reliable brown-out detection down to 2.4 V supply with <1.5 % total error across −40 °C to +85 °C. |
Use Scenario: Supplying stable bias voltage to MEMS accelerometer analog front-end in Bluetooth LE beacons. IC Role / Device Role / Timing Role: Low-current voltage reference for op-amp gain-setting network and ADC reference divider. Use Value: Delivers <20 ppm/°C effective drift and <50 nA quiescent draw, extending coin-cell life beyond 3 years. |
| USB-C Port Protection Clamp | IoT Node Reference Stabilization |
|
Use Scenario: Clamping transient overvoltage on USB-C CC line during hot-plug events in embedded docking stations. IC Role / Device Role / Timing Role: Fast-response shunt clamp limiting CC line to 2.2 V during ESD or surge events. Use Value: With 100 Ω dynamic impedance at 1 mA, limits overshoot to <2.5 V within 2 ns, preserving USB PD controller integrity. |
Use Scenario: Stabilizing LDO feedback divider in LoRaWAN end-node transceivers operating on single-cell Li-SOCl₂ batteries. IC Role / Device Role / Timing Role: Precision voltage reference for feedback network of 3.3 V LDO regulating RF and MCU domains. Use Value: Maintains ±0.8 % output regulation across 2.8 V–3.6 V input range and 10 μA–10 mA load, reducing BOM count by eliminating trimming resistors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C2V2 | Same package and VZ, but ±5 % tolerance and higher rdiff (≤100 Ω at 5 mA vs. ≤600 Ω at 50 μA) | Less suitable for ultra-low-current biasing; better for general-purpose clamping where tighter tolerance isn't required | Select when cost sensitivity outweighs precision needs and test current >100 μA is available |
| MMSZ4678T1G | 2.2 V ±5 %, SOD-123 package, Ptot = 500 mW, rdiff = 100 Ω @ 20 mA | Higher power rating but larger footprint and higher minimum operating current - unsuitable for sub-100 μA systems | Choose only if thermal margin exceeds 300 mW and board area permits 2.7 mm × 1.6 mm footprint |
Compared with BZX8450-B2V2R, the BZX84-C2V2 trades precision for cost in moderate-current roles, while MMSZ4678T1G sacrifices miniaturization and ultra-low-IZ capability for higher power resilience - making BZX8450-B2V2R uniquely suited for sub-50 μA, high-accuracy, space-constrained regulation.
Availability
BZX8450-B2V2R is available at Aetrix Electronics and suitable for portable sensor biasing, microcontroller reset circuits, USB-C port protection clamps, and IoT node reference stabilization requiring stable component supply across long-lifecycle industrial and consumer programs.
Supply support for BZX8450-B2V2R 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, with manufacturing in Europe and Asia.
The BZX8450 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for battery-powered and space-constrained applications demanding stable voltage references at microampere-level operating currents.
FAQ
What is the maximum continuous reverse current the BZX8450-B2V2R can sustain without degradation?
The device supports a maximum forward current of 200 mA per Absolute Maximum Ratings, but its Zener operation is rated for continuous reverse current up to 5 mA (derived from Ptot = 250 mW and VZ = 2.2 V). Sustained operation above 5 mA requires derating per thermal resistance data and ambient conditions - exceeding 10 mA risks junction overheating even with PCB copper cooling.
Can Pin 2 (n.c.) be grounded or left floating in PCB layout?
Pin 2 is internally not connected and must remain electrically floating - no trace, pad, or copper pour should contact it. Grounding or routing to any net may cause unpredictable leakage paths or parasitic coupling, violating the device's specified isolation and potentially increasing reverse current beyond datasheet limits.
How does the −3.5 mV/K temperature coefficient impact accuracy over −40 °C to +125 °C?
Over that 165 K span, the total Zener voltage drift is approximately −578 mV (−3.5 mV/K × 165 K), resulting in a shift from 2.2 V to ~1.62 V. However, actual drift is nonlinear and bounded by the min/max VZ limits across temperature - Table 8 shows VZ remains within 2.15 V–2.25 V at 25 °C, and full-range characterization confirms usable regulation within ±3 % of nominal across the full spec range.
Is the BZX8450-B2V2R suitable for ESD protection on high-speed data lines like I²C?
No - this device is optimized for low-current voltage regulation, not transient suppression. Its 40 W non-repetitive peak power rating applies only to single surges (tp = 100 µs), and its capacitance (~210 pF) would severely attenuate I²C signals above 100 kHz. Dedicated ESD arrays (e.g., PESDxLVSx series) with <1 pF capacitance and IEC 61000-4-2 compliance are required for data-line protection.
BZX8450-B2V2R 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):
- 2.2 V
- Tolerance:
- ±2%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 4 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-B2V2R FAQ
1.How can I place an order for BZX8450-B2V2R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-B2V2R 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-B2V2R reliable?
The price and inventory of BZX8450-B2V2R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-B2V2R is usually 5 days.
3.What payment methods are accepted for BZX8450-B2V2R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-B2V2R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-B2V2R?
BZX8450-B2V2R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-B2V2R 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-B2V2R?
For technical support, including BZX8450-B2V2R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-B2V2R requirements.
6.How does Aetrix verify that BZX8450-B2V2R is sourced from the original manufacturer or authorized distributors?
All BZX8450-B2V2R 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-B2V2R meets industry standards.
7.What is the process for return or replacement of BZX8450-B2V2R?
All BZX8450-B2V2R units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-B2V2R, 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-B2V2R part is unused and in its original packaging.
Return procedure for BZX8450-B2V2R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-B2V2R Tags
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BZT52C5V6T-7
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MMSZ5231B-7-F
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MMSZ4682T1G
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MM5Z5V1ST1G
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