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Nexperia USA Inc. BZX8450-B7V5R
- Part No.:
- BZX8450-B7V5R
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-B7V5R.pdf
- Description:
- DIODE ZENER 7.5V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,494
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Product details
Overview
BZX8450-B7V5R from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, designed for precision biasing and voltage reference in portable electronics. It delivers 7.5 V nominal regulation at 50 µA test current, with ±2 % tolerance, 80 Ω differential resistance at 5 mA, and 2.5 mV/K temperature coefficient. Used in battery-powered sensor signal conditioning circuits where low quiescent current and stable reference are critical.
For engineers reviewing the BZX8450-B7V5R datasheet, BZX8450-B7V5R pinout, BZX8450-B7V5R application, or BZX8450-B7V5R equivalent, this page provides verified electrical parameters, thermal behavior, SOT23 terminal mapping, and validated alternative options for low-power voltage reference design.
Technical Context
This device operates as a reverse-biased Zener diode with specified regulation at IZ = 50 µA - enabling ultra-low standby current operation. Its 7.5 V nominal breakdown voltage is maintained across −55 °C to +150 °C ambient range, with a positive temperature coefficient of +2.5 mV/K ensuring predictable drift in temperature-varying environments.
The BZX8450-B7V5R features intentional minor leakage optimization per AN90031, improving switching speed and reducing noise in reference paths. Its 150 pF capacitance at 0 V and 5.7 µA reverse current at 6.9 V VR enable stable performance in high-impedance feedback networks and low-frequency regulation loops.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 7.5 V at IZ = 50 µA - precise reference point for low-bias analog circuits |
| Tolerance | ±2 % - tight regulation window suitable for 12-bit ADC reference scaling |
| Differential Resistance | 80 Ω at IZ = 5 mA - low dynamic impedance ensures minimal output voltage shift under load variation |
| Temperature Coefficient | +2.5 mV/K - predictable positive drift enables accurate thermal compensation in sensor front-ends |
| Reverse Current | 5.7 µA at VR = 6.9 V - ultra-low leakage preserves battery life in always-on monitoring nodes |
| Forward Voltage | 0.9 V at IF = 10 mA - defines anode-cathode drop during forward conduction in protection clamping |
| Total Power Dissipation | 250 mW at Tamb ≤ 25 °C on FR4 PCB - sets maximum continuous power budget for thermal design |
Pinout & Package
SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch) with three terminals and internal cathode tab solder point.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connects to lower-potential node in reverse-bias configuration; carries forward current during overvoltage clamp |
| 2 | Not Connected (n.c.) | Electrically isolated terminal - must remain unconnected on PCB to avoid parasitic coupling or mechanical stress |
| 3 | Cathode (K) | Reference node connection point; ties to regulated output or feedback network; thermal path to PCB via solder point |
Key Features
| Feature | Design Value |
|---|---|
| Low test current specification | Regulated at 50 µA - enables use in microamp-level bias networks without loading error |
| Optimized leakage profile | Intentional minor IR rise per AN90031 - reduces switching transients and broadband noise in reference rails |
| Stable thermal resistance | Rth(j-sp) = 330 K/W to cathode solder point - supports thermal-aware layout with localized copper pour |
| Two tolerance grades | ±2 % (B-series) and ~±5 % (C-series) - allows cost-performance trade-off in production BOMs |
| Wide operating temperature | −55 °C to +150 °C junction range - qualified for industrial and extended-temperature embedded control |
Applications
| Portable Sensor Biasing | Low-Power ADC Reference |
|---|---|
|
Use Scenario: Providing stable excitation voltage to MEMS pressure sensors in wireless IoT nodes powered by coin-cell batteries. IC Role / Device Role / Timing Role: Zener voltage reference diode operating in reverse breakdown to generate fixed 7.5 V rail for sensor bridge biasing. Use Value: 50 µA test current and 5.7 µA leakage at 6.9 V minimize quiescent drain, extending battery life beyond 5 years in sleep-mode operation. |
Use Scenario: Supplying reference voltage to 12-bit SAR ADCs in battery-operated environmental monitors. IC Role / Device Role / Timing Role: Precision shunt reference establishing VREF input for analog-to-digital conversion accuracy. Use Value: ±2 % tolerance and +2.5 mV/K TC allow direct use without trimming, maintaining <0.5 LSB error across −20 °C to +70 °C operating range. |
| Microcontroller Reset Circuit | Overvoltage Clamp Protection |
|
Use Scenario: Generating threshold voltage for supervisor IC reset assertion in ultra-low-power MCU subsystems. IC Role / Device Role / Timing Role: Regulator diode setting trip point for voltage-monitoring circuit that triggers system reset below 7.0 V. Use Value: Tight 7.5 V ±2 % tolerance ensures consistent reset threshold across production units, eliminating calibration overhead. |
Use Scenario: Clamping transient surges on 5 V logic rails in automotive body-control modules with limited board space. IC Role / Device Role / Timing Role: Reverse-biased Zener acting as fast-acting shunt protector during ESD or load-dump events. Use Value: 80 Ω dynamic impedance and 150 pF capacitance provide sub-10 ns response with minimal signal distortion on high-speed data lines. |
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-C7V5 | ±5 % tolerance, 100 Ω rdiff at 5 mA, +3.8 mV/K TC | Higher initial error and drift - requires post-calibration in precision systems | Select when cost sensitivity outweighs absolute accuracy; acceptable for non-critical biasing |
| MMSZ5236B | 7.5 V ±5 %, 300 mW Ptot, 100 Ω rdiff, no optimized leakage profile | Larger thermal resistance (625 K/W) limits power handling on compact PCBs | Choose only if higher power margin is required and AN90031 noise reduction is not needed |
Compared with BZX8450-B7V5R, the BZX84-C7V5 trades accuracy for cost, while MMSZ5236B offers higher power rating but lacks low-leakage optimization and thermal performance - making the BZX8450-B7V5R optimal for space-constrained, battery-sensitive reference designs.
Availability
BZX8450-B7V5R is available at Aetrix Electronics and suitable for portable sensor biasing, low-power ADC reference, and microcontroller reset circuits requiring stable component supply with guaranteed long-term continuity.
Supply support for BZX8450-B7V5R 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 advanced packaging and automotive-qualified components.
The BZX8450 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for energy-efficient voltage reference and biasing in battery-powered and space-constrained electronics.
FAQ
What is the maximum reverse voltage before breakdown for BZX8450-B7V5R?
The nominal Zener voltage is 7.5 V at 50 µA test current, with guaranteed minimum 7.35 V and maximum 7.65 V across production. Breakdown occurs within this band - no separate "maximum reverse voltage" exists, as it is defined by the VZ specification itself under standardized test conditions.
Can BZX8450-B7V5R be used in forward conduction mode?
Yes - its forward voltage is specified at 0.9 V @ 10 mA, making it usable as a low-drop rectifier or clamping diode. However, its primary design intent and characterization focus is reverse-bias regulation; forward characteristics are secondary and not optimized for high-current switching.
How does the "n.c." pin affect PCB layout?
Pin 2 is internally unconnected and must remain floating on the PCB. Routing traces or placing copper under it may induce parasitic capacitance or mechanical stress. The recommended footprint (Fig. 10) specifies zero solder paste and no copper connection at this location to ensure reliability and signal integrity.
Is BZX8450-B7V5R suitable for automotive applications?
No - this part is not AEC-Q200 qualified and lacks automotive-specific testing or screening. Nexperia explicitly states in its legal disclaimers that non-automotive qualified products are unsuitable for safety-critical or life-support systems. Use only in commercial or industrial environments unless independently validated.
BZX8450-B7V5R 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):
- 7.5 V
- Tolerance:
- ±2%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 5.7 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-B7V5R FAQ
1.How can I place an order for BZX8450-B7V5R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-B7V5R 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-B7V5R reliable?
The price and inventory of BZX8450-B7V5R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-B7V5R is usually 5 days.
3.What payment methods are accepted for BZX8450-B7V5R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-B7V5R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-B7V5R?
BZX8450-B7V5R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-B7V5R 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-B7V5R?
For technical support, including BZX8450-B7V5R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-B7V5R requirements.
6.How does Aetrix verify that BZX8450-B7V5R is sourced from the original manufacturer or authorized distributors?
All BZX8450-B7V5R 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-B7V5R meets industry standards.
7.What is the process for return or replacement of BZX8450-B7V5R?
All BZX8450-B7V5R units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-B7V5R, 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-B7V5R part is unused and in its original packaging.
Return procedure for BZX8450-B7V5R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-B7V5R 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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