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Nexperia USA Inc. BZX8450-C7V5-QR
- Part No.:
- BZX8450-C7V5-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-C7V5-QR.pdf
- Description:
- DIODE ZENER 7.5V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,749
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Product details
Overview
BZX8450-C7V5-QR from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, rated for 7.5 V nominal regulation at 50 µA test current, with ±5 % tolerance, 250 mW total power dissipation, and qualified to AEC-Q101 for automotive use.
For engineers reviewing the BZX8450-C7V5-QR datasheet, BZX8450-C7V5-QR pinout, BZX8450-C7V5-QR application, or BZX8450-C7V5-QR equivalent, this device serves as a precision low-bias voltage reference in battery-powered sensor interfaces, ECU voltage monitoring rails, and automotive infotainment power supervision circuits.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified working voltage of 7.13 V to 7.88 V at IZ = 50 µA, exhibiting low differential resistance (≤80 Ω) and a positive temperature coefficient of +2.5 mV/K. Its leakage current is optimized for fast switching and noise reduction per AN90031.
Designed for low-power biasing, it delivers stable regulation under ambient temperatures from −55 °C to +150 °C, with thermal resistance from junction to ambient of 500 K/W on FR4 PCB, and supports non-repetitive surge power up to 40 W for 100 µs pulses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 7.5 V (min 7.13 V, max 7.88 V at IZ = 50 µA - defines regulation setpoint in low-current bias networks) |
| Tolerance | ±5 % (C-series grading - enables cost-optimized selection where tight voltage accuracy is not critical) |
| Power Dissipation | 250 mW (at Tamb ≤ 25 °C on standard FR4 PCB - sets maximum continuous DC power handling) |
| Forward Voltage | ≤0.9 V at IF = 10 mA - ensures minimal forward drop when used in polarity-sensitive protection or clamping) |
| Differential Resistance | ≤80 Ω at IZ = 5 mA - determines regulation stiffness and output impedance in feedback or reference paths) |
| Reverse Leakage | ≤0.1 µA at VR = 5.7 V - enables ultra-low quiescent current operation in always-on automotive modules) |
| Temperature Coefficient | +2.5 mV/K - provides predictable, linear VZ drift over temperature for compensated designs) |
Pinout & Package
Package: SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch), qualified per AEC-Q101.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connects to lower-potential node in reverse-biased Zener configuration; required for proper breakdown conduction |
| 2 | Not Connected (n.c.) | Internally unconnected terminal - must remain floating; no PCB trace or solder joint should attach |
| 3 | Cathode (K) | Connects to higher-potential node; polarity marker for correct orientation during placement and circuit biasing |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables use in microamp-level bias networks without loading sensitive sources |
| Optimized leakage profile | Intentional minor rise in leakage per AN90031 - improves transient response and reduces broadband noise in regulation loops |
| AEC-Q101 qualification | Qualified for automotive applications - guarantees reliability under temperature cycling, humidity, and mechanical stress per automotive standards |
| Small-footprint SOT23 | 2.9 mm × 1.3 mm footprint - supports high-density PCB layouts in space-constrained ECUs and ADAS modules |
Applications
| Automotive ECU Power Monitoring | Portable Sensor Bias Reference |
|---|---|
|
Use Scenario: Monitoring 12 V battery rail in engine control units to detect undervoltage/overvoltage conditions before MCU reset. IC Role / Device Role / Timing Role: Zener shunt regulator providing stable 7.5 V reference to comparator input for threshold detection. Use Value: Enables accurate, low-power voltage supervision with <0.1 µA leakage, extending sleep-mode battery life in always-on vehicle networks. |
Use Scenario: Supplying precise bias voltage to MEMS pressure sensor front-end in wireless tire pressure monitoring systems (TPMS). IC Role / Device Role / Timing Role: Low-current Zener reference establishing fixed operating point for analog signal conditioning amplifier. Use Value: Delivers 7.5 V regulation at 50 µA test current, matching sensor's ultra-low quiescent requirement while maintaining ±5 % accuracy across −40 °C to +125 °C. |
| Infotainment System LDO Input Clamp | Industrial CAN Transceiver Voltage Clamp |
|
Use Scenario: Clamping input voltage to a 5 V LDO in automotive head unit power stage to prevent overvoltage damage during load dump transients. IC Role / Device Role / Timing Role: Shunt protection device limiting upstream rail to 7.5 V before LDO input, absorbing surge energy. Use Value: Withstands 40 W non-repetitive peak reverse power (100 µs pulse), providing robust transient suppression without crowbar action. |
Use Scenario: Stabilizing VCC supply node of ISO 11898-compliant CAN transceivers in industrial gateways exposed to noisy 24 V bus environments. IC Role / Device Role / Timing Role: Precision Zener regulating local 7.5 V auxiliary rail for transceiver logic and fault-detection circuitry. Use Value: Differential resistance ≤80 Ω ensures minimal voltage shift under varying load currents, preserving CAN bit timing integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C7V5,115 | Same 7.5 V, ±5 %, SOT23 package but not AEC-Q101 qualified; higher typical leakage (0.5 µA vs. 0.1 µA) | Restricted to commercial-grade portable electronics; unsuitable for automotive under-hood deployment | Select only for cost-sensitive non-automotive designs where qualification and ultra-low leakage are not required |
| MMSZ5235B-TP | 7.5 V, ±5 %, SOD-123 package; 500 mW rating but larger footprint; rdiff = 100 Ω (vs. 80 Ω); no AEC-Q101 certification | Used in industrial power supplies where board space allows larger package and higher power margin is needed | Choose when thermal derating above 250 mW is essential and automotive qualification is unnecessary |
Compared with BZX8450-C7V5-QR, the BZX84-C7V5,115 lacks automotive qualification and exhibits higher leakage, while MMSZ5235B-TP trades smaller size and tighter regulation for larger footprint and no AEC-Q101 compliance-making the BZX8450-C7V5-QR uniquely suited for space-constrained, safety-critical automotive voltage references.
Availability
BZX8450-C7V5-QR is available at Aetrix Electronics and suitable for automotive ECU monitoring, portable sensor biasing, and industrial CAN transceiver voltage stabilization requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZX8450-C7V5-QR 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 automotive-qualified components and advanced packaging.
The BZX8450-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for low-current voltage regulation in automotive electronics where space, power efficiency, and long-term stability are critical.
FAQ
What is the maximum continuous reverse power dissipation for BZX8450-C7V5-QR at 85 °C ambient?
At Tamb = 85 °C, the device's total power dissipation must be derated linearly from 250 mW at 25 °C using its thermal resistance of 500 K/W. The maximum allowable is 100 mW, calculated as 250 mW × (1 − (85 − 25)/500), ensuring junction temperature remains below 150 °C under steady-state operation.
Can BZX8450-C7V5-QR be used in series to achieve higher regulation voltage?
No - the BZX8450-C7V5-QR is not characterized or guaranteed for series operation. Its differential resistance, leakage profile, and thermal coupling are specified only for single-device use. Series connection introduces mismatched temperature coefficients and uneven current sharing, risking regulation instability and premature failure.
Is pin 2 truly unconnected, or does it serve a thermal function?
Pin 2 is electrically and physically unconnected (n.c.), with no internal bond wire or die attachment. It serves no electrical or thermal function - the datasheet explicitly states "not connected", and thermal resistance values (Rth(j-a), Rth(j-sp)) are measured with pin 2 floating. PCB land design must isolate it completely.
How does the +2.5 mV/K temperature coefficient impact regulation accuracy over −40 °C to +125 °C?
Over that range, the Zener voltage shifts by +2.5 mV/K × 165 K = +412.5 mV, resulting in a total VZ span of approximately 7.13 V to 8.29 V. This 16 % variation must be accommodated in system-level tolerance budgets, especially in precision analog sensing where absolute voltage accuracy matters more than stability.
BZX8450-C7V5-QR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX8450-Q
- 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:
- ±5%
- 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:
- -55°C ~ 150°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BZX8450-C7V5-QR FAQ
1.How can I place an order for BZX8450-C7V5-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-C7V5-QR 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-C7V5-QR reliable?
The price and inventory of BZX8450-C7V5-QR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-C7V5-QR is usually 5 days.
3.What payment methods are accepted for BZX8450-C7V5-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C7V5-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-C7V5-QR?
BZX8450-C7V5-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-C7V5-QR 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-C7V5-QR?
For technical support, including BZX8450-C7V5-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C7V5-QR requirements.
6.How does Aetrix verify that BZX8450-C7V5-QR is sourced from the original manufacturer or authorized distributors?
All BZX8450-C7V5-QR 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-C7V5-QR meets industry standards.
7.What is the process for return or replacement of BZX8450-C7V5-QR?
All BZX8450-C7V5-QR units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C7V5-QR, 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-C7V5-QR part is unused and in its original packaging.
Return procedure for BZX8450-C7V5-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-C7V5-QR Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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Diodes Incorporated
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MM5Z5V1ST1G
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SMAJ4744A-TP
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BZT52C3V6LP-7
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SMAZ12-13-F
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