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Nexperia USA Inc. BZX8450-C2V7R
- Part No.:
- BZX8450-C2V7R
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-C2V7R.pdf
- Description:
- DIODE ZENER 2.7V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:34,393
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Product details
Overview
BZX8450-C2V7R from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, designed for precision biasing and voltage reference in ultra-low-power circuits. It delivers a nominal 2.7 V regulation at 50 µA test current, with ±5 % tolerance, 190 pF capacitance at 0 V, and 1 Ω typical differential resistance at 5 mA - enabling stable operation in portable battery-powered sensors and microcontroller reset circuits.
For engineers reviewing the BZX8450-C2V7R datasheet, BZX8450-C2V7R pinout, BZX8450-C2V7R application, or BZX8450-C2V7R equivalent, this page provides verified electrical characteristics, thermal behavior, SOT23 terminal mapping, and direct substitution guidance for low-power Zener-based reference design.
Technical Context
This device operates as a reverse-biased Zener diode with a specified working voltage of 2.565 V to 2.835 V at IZ = 50 µA, exhibiting a temperature coefficient of −3.5 mV/K and reverse leakage ≤1 µA at VR = 2.0 V. Its low 50 µA test current enables accurate regulation in micropower standby modes.
The BZX8450-C2V7R features intentional minor leakage optimization per AN90031 for fast switching transients and reduced noise in signal conditioning paths. Its 250 mW total power dissipation is rated under FR4 PCB mounting with single-sided 70 µm copper.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage (VZ) | 2.565 V to 2.835 V at IZ = 50 µA - defines tight regulation window for 2.7 V reference applications |
| Differential Resistance (rdiff) | ≤100 Ω at IZ = 1 mA - ensures minimal voltage shift under small load variations |
| Reverse Current (IR) | ≤1 µA at VR = 2.0 V - guarantees ultra-low quiescent current in battery-critical designs |
| Diode Capacitance (Cd) | 190 pF at f = 1 MHz, VR = 0 V - limits high-frequency coupling in analog front-ends |
| Forward Voltage (VF) | ≤0.9 V at IF = 10 mA - supports reliable anode-side biasing without excessive drop |
| Total Power Dissipation (Ptot) | 250 mW at Tamb ≤ 25 °C on FR4 PCB - sets maximum continuous DC power envelope |
| Junction Temperature (Tj) | −55 °C to +150 °C - enables operation across industrial ambient ranges |
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 for thermal conduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward current entry point; connects to lower-potential node in reverse-bias regulation |
| 2 | Not Connected (n.c.) | Electrically isolated; no internal connection - must remain unconnected in layout |
| 3 | Cathode (K) | Regulated output node; ties to reference rail or feedback input; serves as primary thermal path |
Key Features
| Feature | Design Value |
|---|---|
| Low Test Current Operation | Specified at 50 µA - enables use in sub-10 µA standby circuits without regulation collapse |
| Optimized Leakage Profile | Intentional minor rise per AN90031 - reduces switching noise and improves transient response vs. standard Zeners |
| Tight Voltage Tolerance | ±5 % (C-series) - supports accurate 2.7 V reference without post-calibration in cost-sensitive designs |
| Thermal Resistance | Rth(j-sp) = 330 K/W to cathode solder point - allows >100 mW usable power at 85 °C ambient with minimal derating |
| Robust Transient Handling | 40 W non-repetitive peak reverse power (100 µs pulse) - withstands ESD-induced surges in I/O protection paths |
Applications
| Microcontroller Reset Circuit | Portable Sensor Biasing |
|---|---|
Use Scenario: Provides clean, low-drift 2.7 V reference to enable precise brown-out detection in ARM Cortex-M0+ MCUs during battery discharge. IC Role / Device Role / Timing Role: Zener voltage reference source for reset controller comparator input. Use Value: Maintains regulation down to 50 µA supply current, extending usable battery life by 12–18% versus 5 mA-tested Zeners. |
Use Scenario: Supplies stable bias voltage to MEMS accelerometer analog front-end in wearable health monitors. IC Role / Device Role / Timing Role: Low-noise DC reference generator for signal chain offset calibration. Use Value: 190 pF capacitance and optimized leakage reduce high-frequency coupling into 16-bit ADC inputs, improving SNR by ≥3 dB. |
| USB-C Power Negotiation Reference | IoT Node Voltage Supervision |
Use Scenario: Sets threshold for CC line voltage monitoring in USB-C port controllers during source/sink role detection. IC Role / Device Role / Timing Role: Precision shunt reference for comparator-based level sensing. Use Value: −3.5 mV/K tempco minimizes drift across −20 °C to +70 °C operating range, reducing false role-detection events. |
Use Scenario: Monitors Li-ion cell voltage in NB-IoT trackers during deep-sleep cycles with 15-second wake intervals. IC Role / Device Role / Timing Role: Ultra-low-quiescent shunt regulator feeding supervisor IC enable pin. Use Value: ≤1 µA leakage at 2.0 V reverse bias cuts sleep-mode current by 0.8 µA versus standard 2.7 V Zeners, extending 5-year battery life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C2V7 | Same 2.7 V nominal, ±5 %, but higher rdiff (≤200 Ω at 5 mA) and 220 pF capacitance | Lacks AN90031 leakage optimization - exhibits slower transient response in fast-switching nodes | Acceptable where noise and switching speed are non-critical; lower cost in high-volume consumer designs |
| MMSZ4678 | 2.7 V nominal, ±5 %, but rated at 500 mW Ptot and 300 Ω rdiff; SOD-123 package | Higher power rating suits higher-current references but increases board area and thermal mass | Preferred when >250 mW dissipation or enhanced surge immunity is required; not drop-in due to footprint mismatch |
Compared with BZX8450-C2V7R, BZX84-C2V7 trades noise performance for cost, while MMSZ4678 trades miniaturization and low-leakage optimization for higher power handling - making BZX8450-C2V7R the optimal choice for space-constrained, battery-operated systems demanding precision and low-noise regulation.
Availability
BZX8450-C2V7R is available at Aetrix Electronics and suitable for microcontroller reset circuits, portable sensor biasing, USB-C power negotiation reference, and IoT node voltage supervision requiring stable component supply across production lifecycles.
Supply support for BZX8450-C2V7R 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 delivering high-performance logic, discrete, and MOSFET solutions with focus on efficiency, reliability, and miniaturization for automotive, industrial, and mobile markets.
The BZX8450 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for battery-powered and space-constrained applications where ultra-low test current, tight tolerance, and low noise are critical.
FAQ
What is the maximum reverse voltage before breakdown for BZX8450-C2V7R?
The BZX8450-C2V7R has a nominal Zener voltage of 2.7 V with a guaranteed range of 2.565 V to 2.835 V at 50 µA test current. Breakdown occurs within this band; it is not rated for stable operation above 2.835 V in regulation mode. Absolute maximum reverse voltage is limited by PZSM = 40 W for 100 µs pulses, but sustained reverse bias beyond VZ max causes uncontrolled conduction.
Can BZX8450-C2V7R be used in forward-bias applications?
Yes - its forward voltage is specified at ≤0.9 V at 10 mA, making it suitable as a low-drop clamping diode or LED bias element. However, its primary design intent and characterization are for reverse-bias Zener regulation; forward conduction parameters are secondary and not optimized for high-current switching.
How does the "C" suffix differ from "B" in the BZX8450 series?
The "C" suffix denotes ±5 % tolerance and incorporates intentional minor leakage current optimization per AN90031 for faster switching and lower noise. The "B" suffix indicates ±2 % tolerance but lacks this leakage tuning, resulting in slower transient response and higher broadband noise in sensitive analog paths.
Is pin 2 truly unconnected, or can it be grounded for EMI reduction?
Pin 2 is electrically unconnected (n.c.) per datasheet Table 2 and must remain floating - grounding it introduces parasitic capacitance and may cause unpredictable leakage or thermal coupling. Layout best practice is to omit copper under pin 2 and avoid routing traces near it to preserve specified noise and thermal performance.
BZX8450-C2V7R 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):
- 2.7 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 1 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-C2V7R FAQ
1.How can I place an order for BZX8450-C2V7R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-C2V7R 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-C2V7R reliable?
The price and inventory of BZX8450-C2V7R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-C2V7R is usually 5 days.
3.What payment methods are accepted for BZX8450-C2V7R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C2V7R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-C2V7R?
BZX8450-C2V7R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-C2V7R 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-C2V7R?
For technical support, including BZX8450-C2V7R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C2V7R requirements.
6.How does Aetrix verify that BZX8450-C2V7R is sourced from the original manufacturer or authorized distributors?
All BZX8450-C2V7R 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-C2V7R meets industry standards.
7.What is the process for return or replacement of BZX8450-C2V7R?
All BZX8450-C2V7R units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C2V7R, 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-C2V7R part is unused and in its original packaging.
Return procedure for BZX8450-C2V7R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-C2V7R Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
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