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Nexperia USA Inc. BZX8450-B3V0R
- Part No.:
- BZX8450-B3V0R
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-B3V0R.pdf
- Description:
- DIODE ZENER 3V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,126
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Product details
Overview
BZX8450-B3V0R from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, designed for precision voltage reference and low-power biasing in portable electronics. It delivers a nominal 3.0 V regulation at 50 µA test current, with ±2 % tolerance, 0.8 µA max reverse leakage at VR = 2.4 V, and 250 mW total power dissipation - optimized for battery-powered sensor nodes and microcontroller reset circuits.
For engineers reviewing the BZX8450-B3V0R datasheet, BZX8450-B3V0R pinout, BZX8450-B3V0R application, or BZX8450-B3V0R equivalent, this page provides verified electrical characteristics, thermal behavior, SOT23 terminal mapping, and validated alternatives for low-bias voltage reference design.
Technical Context
This Zener diode operates in reverse breakdown with a specified working voltage of 2.94 V to 3.06 V at IZ = 50 µA, exhibiting a temperature coefficient of −3.5 mV/K and differential resistance ≤600 Ω at IZ = 5 mA. Its low 50 µA test current enables stable regulation under ultra-low quiescent current conditions.
The device features intentional minor leakage optimization (per AN90031) for fast switching transients and reduced noise in signal conditioning paths. Thermal resistance from junction to ambient is 500 K/W on FR4 PCB, supporting operation from −55 °C to +150 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Regulation Voltage (VZ) | 2.94 V to 3.06 V at IZ = 50 µA - tight tolerance enables accurate low-current reference without trimming |
| Reverse Leakage (IR) | ≤0.8 µA at VR = 2.4 V - ensures minimal standby current drain in battery-critical systems |
| Forward Voltage (VF) | ≤0.9 V at IF = 10 mA - supports reliable anode-cathode conduction during forward-biased protection modes |
| Total Power Dissipation (Ptot) | 250 mW at Tamb ≤ 25 °C - defines maximum continuous DC or pulsed power handling on standard FR4 PCB |
| Differential Resistance (rdiff) | ≤600 Ω at IZ = 5 mA - quantifies dynamic impedance affecting regulation stability under load variation |
| Temperature Coefficient (SZ) | −3.5 mV/K - predicts voltage drift over temperature, critical for precision analog reference designs |
| Junction-to-Ambient Rth | 500 K/W - determines thermal rise per watt, guiding PCB copper area and layout for thermal management |
Pinout & Package
SOT23 plastic surface-mount package: 3-terminal, 1.9 mm pitch, 2.9 mm × 1.3 mm × 1.0 mm body, tin-plated leads, compatible with reflow and wave soldering per IPC-7095.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-bias connection point; must be held at lower potential than cathode to enable Zener conduction |
| 2 | Not Connected (n.c.) | Internally unconnected terminal; no electrical function - must remain floating or grounded per layout best practice |
| 3 | Cathode (K) | Reverse-bias connection point; tied to regulated voltage rail; carries full Zener current during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low Test Current Operation | Specified at 50 µA - enables stable regulation in µA-level bias networks for IoT sensors and sleep-mode circuits |
| Tight Voltage Tolerance | ±2 % (B-series) - eliminates need for external trimming in cost-sensitive voltage reference applications |
| Optimized Leakage Profile | Intentional minor IR rise per AN90031 - reduces switching noise and improves transient response in feedback paths |
| Thermal Robustness | 150 °C max junction temperature - supports operation in high-ambient industrial and automotive under-hood environments |
| Standard SOT23 Footprint | Compatible with automated assembly and IPC-7095 reflow profiles - ensures manufacturability across contract manufacturers |
Applications
| Microcontroller Reset Circuit | Portable Sensor Biasing |
|---|---|
Use Scenario: Provides clean, low-drift reset threshold for ARM Cortex-M0+ MCUs in wearable health monitors. IC Role / Device Role / Timing Role: Zener-based voltage reference feeding comparator input in RC reset generator. Use Value: 0.8 µA max leakage preserves battery life over multi-year deployments; −3.5 mV/K TC minimizes reset voltage shift across operating temperature. |
Use Scenario: Supplies stable 3.0 V bias to MEMS accelerometer and ADC front-end in wireless environmental node. IC Role / Device Role / Timing Role: Low-current voltage reference establishing analog signal chain ground-referenced operating point. Use Value: 50 µA test current matches typical sensor bias requirements; 600 Ω rdiff maintains <10 mV regulation error under 10 µA load variation. |
| USB-C Power Negotiation Reference | Industrial PLC Input Protection |
Use Scenario: Sets precise 3.0 V threshold for USB PD CC line voltage detection in embedded host controllers. IC Role / Device Role / Timing Role: Regulation element in resistive divider network defining PD communication logic level. Use Value: ±2 % tolerance ensures compliance with USB PD 3.1 specification VBUS monitoring accuracy; SOT23 footprint fits space-constrained Type-C port layouts. |
Use Scenario: Clamps transient-induced overvoltage on 24 V digital input channel of DIN-rail mounted PLC module. IC Role / Device Role / Timing Role: Low-energy Zener clamp placed before optocoupler input to limit surge stress. Use Value: 250 mW Ptot withstands repetitive 100 µs surges up to 40 W peak; 150 °C Tj rating sustains reliability in enclosed control cabinets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-current Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5226BS-7-F | 3.0 V ±5 %, 200 mW Ptot, 100 nA IR at VR = 2.4 V - tighter leakage but looser tolerance | Preferred where ultra-low standby current dominates over voltage accuracy | Select when leakage <100 nA is mandatory and ±5 % regulation is acceptable |
| BZX84-C3V0,115 | 3.0 V ±5 %, same SOT23 package, 250 mW Ptot, 0.1 µA IR at VR = 2.4 V - higher leakage than B-series but broader availability | Used in cost-driven consumer electronics where ±5 % tolerance is sufficient | Choose for legacy BOM compatibility or distributor stock priority over tight tolerance |
Compared with BZX8450-B3V0R, MMBZ5226BS-7-F offers superior leakage performance but sacrifices voltage accuracy; BZX84-C3V0,115 trades tolerance for wider distribution and lower unit cost - making BZX8450-B3V0R optimal for precision low-power references where ±2 % and sub-µA leakage are jointly required.
Availability
BZX8450-B3V0R is available at Aetrix Electronics and suitable for microcontroller reset circuits, portable sensor biasing, USB-C power negotiation references, and industrial PLC input protection requiring stable component supply across production lifecycles.
Supply support for BZX8450-B3V0R 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, serving automotive, industrial, and consumer markets with ISO/TS 16949-certified manufacturing.
The BZX8450 series belongs to Nexperia's low-current Zener regulator product line, engineered specifically for battery-constrained and thermally sensitive applications demanding precision voltage reference at µA-level bias currents.
FAQ
What is the maximum reverse voltage (VR) at which leakage current remains ≤0.8 µA?
At VR = 2.4 V, the BZX8450-B3V0R guarantees reverse leakage current ≤0.8 µA per datasheet Table 8. This value is measured at Tj = 25 °C and defines the upper bound of usable reverse bias before significant conduction begins - critical for setting safe operating margins in clamping and reference designs.
Can BZX8450-B3V0R be used in forward conduction mode?
Yes - its forward voltage is specified ≤0.9 V at IF = 10 mA (Table 1), confirming reliable anode-to-cathode conduction. However, it is not optimized for rectification; use is limited to protection or dual-mode biasing where low VF and small size outweigh efficiency concerns.
How does the "n.c." pin (Pin 2) affect PCB layout?
Pin 2 is internally unconnected and must remain electrically floating. Do not tie it to ground or any net - doing so may cause unintended parasitic coupling or solder bridging. Maintain minimum 0.2 mm clearance and avoid placing traces or vias beneath it per Nexperia's SOT23 layout guidelines.
Is thermal derating required above 25 °C ambient?
Yes - total power dissipation must be linearly derated above Tamb = 25 °C using Rth(j-a) = 500 K/W. For example, at Tamb = 75 °C, maximum allowable Ptot drops to 150 mW. Derating ensures junction temperature stays below 150 °C, preserving long-term reliability and regulation stability.
BZX8450-B3V0R 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 V
- Tolerance:
- ±2%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 800 nA @ 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-B3V0R FAQ
1.How can I place an order for BZX8450-B3V0R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-B3V0R 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-B3V0R reliable?
The price and inventory of BZX8450-B3V0R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-B3V0R is usually 5 days.
3.What payment methods are accepted for BZX8450-B3V0R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-B3V0R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-B3V0R?
BZX8450-B3V0R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-B3V0R 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-B3V0R?
For technical support, including BZX8450-B3V0R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-B3V0R requirements.
6.How does Aetrix verify that BZX8450-B3V0R is sourced from the original manufacturer or authorized distributors?
All BZX8450-B3V0R 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-B3V0R meets industry standards.
7.What is the process for return or replacement of BZX8450-B3V0R?
All BZX8450-B3V0R units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-B3V0R, 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-B3V0R part is unused and in its original packaging.
Return procedure for BZX8450-B3V0R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-B3V0R Tags
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MMSZ4682T1G
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MM5Z5V1ST1G
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