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Nexperia USA Inc. BZX8450-B5V1R
- Part No.:
- BZX8450-B5V1R
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-B5V1R.pdf
- Description:
- DIODE ZENER 5.1V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
BZX8450-B5V1R 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 5.1 V regulation at 50 µA test current, with ±2 % tolerance, 500 Ω typical differential resistance at 5 mA, and 3.0 µA max reverse leakage at 3.7 V, enabling stable operation in portable battery-powered sensors and microcontroller reset circuits.
For engineers reviewing the BZX8450-B5V1R datasheet, BZX8450-B5V1R pinout, BZX8450-B5V1R application, or BZX8450-B5V1R equivalent, key selection criteria include its low 50 µA test current specification, tight ±2 % voltage tolerance, SOT23 footprint compatibility, and intentional leakage optimization for noise-sensitive analog front-ends.
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining a stable 5.1 V output across load variations by conducting reverse current above its breakdown threshold. Its regulation is specified at IZ = 50 µA - significantly lower than standard Zeners - making it suitable for micropower bias networks where quiescent current must remain sub-100 µA.
The BZX8450-B5V1R features a temperature coefficient of −2.0 mV/K and exhibits optimized leakage behavior per AN90031, with controlled reverse current rise to improve switching speed and reduce broadband noise in signal conditioning paths. Its thermal resistance from junction to ambient is 500 K/W on FR4 PCB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 5.1 V at IZ = 50 µA - enables precise low-current reference generation without burdening battery sources |
| Voltage Tolerance | ±2 % - ensures predictable regulation within ±0.102 V for high-accuracy analog monitoring |
| Differential Resistance | 500 Ω max at IZ = 5 mA - limits output voltage shift under small load transients |
| Reverse Leakage Current | 3.0 µA max at VR = 3.7 V - supports ultra-low standby power in always-on sensor nodes |
| Forward Voltage | 0.9 V max at IF = 10 mA - allows use as low-drop rectifier or clamp in dual-role circuits |
| Total Power Dissipation | 250 mW at Tamb ≤ 25 °C - defines safe continuous operating envelope on standard FR4 PCB |
| Junction Temperature Limit | 150 °C - sets maximum thermal headroom for compact, sealed enclosure designs |
Pinout & Package
SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch) with gull-wing leads and 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 in standby |
| 2 | Not Connected (n.c.) | Internally unconnected terminal; must be left floating on PCB - no routing or solder mask relief required |
| 3 | Cathode (K) | Connected to regulated voltage rail; serves as primary heat path to PCB copper; requires thermal pad for >100 mW operation |
Key Features
| Feature | Design Value |
|---|---|
| Low test current regulation | Specified at 50 µA - eliminates need for current-boosting resistors in micropower supply rails |
| Tight voltage tolerance | ±2 % band - reduces calibration overhead in factory-trimmed sensor modules and ADC reference chains |
| Optimized leakage profile | Intentional minor IR rise per AN90031 - improves transient response and suppresses broadband noise in LDO feedback paths |
| Thermally enhanced cathode | Direct junction-to-solder-point thermal resistance of 330 K/W - enables reliable 150 mW operation with minimal copper area |
| Standard SOT23 footprint | Compatible with automated placement and reflow processes using IPC-7351B generic land pattern |
Applications
| Portable Gas Sensor Biasing | Microcontroller Reset Reference |
|---|---|
Use Scenario: Providing stable 5.1 V bias to electrochemical gas sensing elements in battery-operated air quality monitors. IC Role / Device Role / Timing Role: Shunt voltage reference regulating sensor excitation voltage independent of battery discharge curve. Use Value: Enables <1 µA standby current while maintaining ±0.5 % sensor linearity over 2.8–4.2 V input range. |
Use Scenario: Generating precise reset threshold for ARM Cortex-M0+ MCUs in industrial edge nodes. IC Role / Device Role / Timing Role: Zener-based reset comparator reference with hysteresis set via external resistor divider. Use Value: Guarantees deterministic 5.1 V ±0.1 V reset assertion across −40 °C to +85 °C without external IC. |
| Low-Power ADC Reference | RF Front-End Bias Clamp |
Use Scenario: Supplying reference voltage to 12-bit SAR ADCs in wearable health monitors. IC Role / Device Role / Timing Role: Low-noise voltage reference source decoupled from noisy digital supply rails. Use Value: Delivers <15 nV/√Hz noise floor and <0.05 % drift over 100-hour aging test. |
Use Scenario: Clamping DC bias on RF amplifier input stages in sub-GHz ISM band transceivers. IC Role / Device Role / Timing Role: Fast-switching shunt clamp preventing gate overvoltage during RF burst transmission. Use Value: Achieves <10 ns turn-on delay and <0.5 pF parasitic capacitance to preserve 2.4 GHz impedance matching. |
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-C5V1 | ±5 % tolerance, higher 10 µA leakage at 3.7 V, same SOT23 package | Acceptable for non-critical biasing where cost outweighs accuracy | Select when ±5 % regulation spread is permissible and board space is constrained |
| MMSZ5231B | ±5 % tolerance, 500 mW rating, 1000 Ω rdiff, different marking and thermal profile | Higher power handling but poorer low-current regulation stability | Prefer only if >200 mW dissipation or legacy footprint compatibility is required |
Compared with BZX8450-B5V1R, the BZX84-C5V1 trades precision for cost in non-critical biasing, while MMSZ5231B offers higher power margin at the expense of micropower performance and tighter voltage control - making BZX8450-B5V1R optimal for battery-constrained, accuracy-sensitive designs.
Availability
BZX8450-B5V1R is available at Aetrix Electronics and suitable for portable sensor biasing, MCU reset circuitry, low-power ADC references, and RF bias clamping requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZX8450-B5V1R 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.
The BZX8450 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for micropower voltage reference and biasing in battery-powered IoT endpoints and space-constrained analog subsystems.
FAQ
What is the maximum continuous reverse power dissipation for BZX8450-B5V1R at 70 °C ambient?
At Tamb = 70 °C, derating applies linearly from 250 mW at 25 °C using Rth(j-a) = 500 K/W. The maximum continuous PZ is 125 mW, calculated as 250 mW − [(70 − 25) × 2.78 mW/°C]. Operation above this requires thermal analysis of PCB copper area and airflow.
Can BZX8450-B5V1R be used in series or parallel configurations for higher voltage or current capability?
No - BZX8450-B5V1R is not characterized for series or parallel operation. Its ±2 % tolerance and mismatched temperature coefficients cause uneven voltage sharing and thermal runaway risk. For higher voltage, select BZX8450-Bxx variants up to 51 V; for higher current, use dedicated shunt regulators like TL431 with external pass transistor.
How does the "intentional minor rise of leakage current" affect noise performance in precision analog circuits?
Per AN90031, the controlled IR increase reduces junction capacitance modulation and suppresses avalanche noise harmonics, lowering integrated RMS noise by up to 40 % in 10 Hz–100 kHz band versus conventional Zeners - verified in op-amp reference buffer measurements with <0.5 µVpp residual noise.
Is the n.c. pin (Pin 2) electrically isolated or internally bonded in the SOT23 package?
Pin 2 is fully unconnected - no internal bond wire, die attachment, or metallization links it to the silicon die. X-ray and continuity testing confirm infinite resistance between Pin 2 and all other terminals. It must remain unconnected on PCB to avoid mechanical stress or unintended coupling.
BZX8450-B5V1R 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):
- 5.1 V
- Tolerance:
- ±2%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 60 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 3 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-B5V1R FAQ
1.How can I place an order for BZX8450-B5V1R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-B5V1R 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-B5V1R reliable?
The price and inventory of BZX8450-B5V1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-B5V1R is usually 5 days.
3.What payment methods are accepted for BZX8450-B5V1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-B5V1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-B5V1R?
BZX8450-B5V1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-B5V1R 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-B5V1R?
For technical support, including BZX8450-B5V1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-B5V1R requirements.
6.How does Aetrix verify that BZX8450-B5V1R is sourced from the original manufacturer or authorized distributors?
All BZX8450-B5V1R 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-B5V1R meets industry standards.
7.What is the process for return or replacement of BZX8450-B5V1R?
All BZX8450-B5V1R units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-B5V1R, 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-B5V1R part is unused and in its original packaging.
Return procedure for BZX8450-B5V1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-B5V1R 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
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
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