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Nexperia USA Inc. BZX38450-C7V5-QF
- Part No.:
- BZX38450-C7V5-QF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-C7V5-QF.pdf
- Description:
- DIODE ZENER 7.5V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:8,025
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Product details
Overview
BZX38450-C7V5-Q from Nexperia is a low-current Zener voltage regulator diode in SOD323 (SC-76) package, rated for 7.5 V nominal regulation at 50 µA test current, with ±5 % tolerance, 300 mW power dissipation, and AEC-Q101 qualification for automotive use.
For engineers reviewing the BZX38450-C7V5-Q datasheet, BZX38450-C7V5-Q pinout, BZX38450-C7V5-Q application, or BZX38450-C7V5-Q equivalent, this device is selected for precision low-bias voltage reference, battery-powered sensor biasing, and automotive ECU voltage clamping where low leakage and thermal stability are critical.
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 a positive temperature coefficient of +2.5 mV/K and differential resistance of ≤80 Ω at IZ = 5 mA. Its low 50 µA test current enables stable regulation in ultra-low-power circuits.
Designed for automotive-grade reliability, it features qualified AEC-Q101 stress testing, junction temperature rating up to 150 °C, and thermal resistance from junction to ambient of 415 K/W on FR4 PCB - enabling robust operation in engine bay and infotainment subsystems.
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 stable reference point for low-current bias networks) |
| Tolerance | ±5 % (C-series grading - supports cost-optimized designs where tighter tolerance is not required) |
| Power Dissipation | 300 mW (max at Tamb ≤ 25 °C on standard FR4 - sets thermal design boundary for PCB layout) |
| Test Current | 50 µA (enables regulation in micro-power applications such as RTC backup or sensor wake-up circuits) |
| Differential Resistance | ≤80 Ω (at IZ = 5 mA - determines output impedance and load regulation sensitivity) |
| Reverse Leakage | ≤0.1 µA at VR = 5.7 V (low leakage preserves battery life in always-on automotive modules) |
| Forward Voltage | ≤0.9 V at IF = 10 mA (supports use as polarity protection or clamp in bidirectional signal paths) |
Pinout & Package
SOD323 (SC-76) surface-mount plastic package: 1.7 mm × 1.25 mm × 0.95 mm body, 1.3 mm lead pitch, cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated voltage node; marking bar identifies this terminal - critical for correct orientation during automated placement |
| 2 | Anode (A) | Connected to ground or lower-potential rail; forms reverse-biased junction for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables stable regulation in battery-powered systems drawing <1 µA quiescent current |
| AEC-Q101 qualification | Qualified per Automotive Electronics Council stress test standard - supports deployment in engine control, ADAS, and body electronics |
| Optimized leakage profile | Intentional minor rise in leakage current (per AN90031) - improves switching speed and reduces noise in dynamic clamping applications |
| Thermal performance | Rth(j-a) = 415 K/W on FR4 - allows direct thermal modeling for ambient temperatures up to +125 °C in under-hood environments |
Applications
| Automotive ECU Voltage Clamp | Portable Sensor Bias Reference |
|---|---|
Use Scenario: Clamping transient overvoltage on 5 V supply rail of engine control unit during load dump events. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to shunt excess energy and limit rail voltage to ≤8.5 V. Use Value: With 7.5 V nominal Zener and ±5 % tolerance, clamps within safe margin below 9 V absolute maximum rating of downstream MCU I/O pins. |
Use Scenario: Providing stable bias voltage to MEMS pressure sensor in tire pressure monitoring system (TPMS). IC Role / Device Role / Timing Role: Low-current Zener reference establishing fixed bias point for sensor amplifier input stage. Use Value: 50 µA test current and 0.1 µA leakage at 5.7 V ensure <1 µA total quiescent draw - extending coin-cell battery life beyond 10 years. |
| USB-C Port ESD Protection Auxiliary Clamp | Industrial PLC Input Signal Conditioning |
Use Scenario: Secondary voltage clamp in USB-C CC line protection circuit alongside TVS diode. IC Role / Device Role / Timing Role: Precision Zener holding CC line at defined logic threshold during hot-plug detection. Use Value: Tight 7.13–7.88 V range ensures reliable detection of 5 V VCONN while avoiding false triggers from noise or ripple. |
Use Scenario: Level-shifting and overvoltage limiting for 24 V analog input channel in programmable logic controller. IC Role / Device Role / Timing Role: Zener-based front-end clamp protecting ADC input against transients exceeding 10 V. Use Value: 80 Ω differential resistance and 300 mW power rating allow sustained 100 ms surges up to 12 V without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B7V5 | Same 7.5 V nominal, ±2 % tolerance, but higher 100 µA test current and no AEC-Q101 qualification | Not suitable for automotive production; limited to industrial or consumer grade designs | Select when tighter voltage tolerance is required and automotive qualification is unnecessary |
| MMSZ5236B-7-F | 7.5 V nominal, ±5 %, 500 mW Ptot, SOD-123 package (larger footprint), no AEC-Q101 | Higher power handling but incompatible with space-constrained SOD323 layouts | Choose only if board real estate permits larger package and thermal budget exceeds 300 mW |
Compared with BZX38450-C7V5-Q, BZX384-B7V5 offers tighter tolerance but lacks automotive qualification, while MMSZ5236B-7-F provides higher power at the cost of larger size and no AEC-Q101 - making the C7V5-Q optimal for space- and reliability-constrained automotive modules.
Availability
BZX38450-C7V5-Q is available at Aetrix Electronics and suitable for automotive ECU protection, portable sensor biasing, and industrial PLC input conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZX38450-C7V5-Q 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 technologies.
The BZX38450-Q series belongs to Nexperia's automotive-grade Zener diode product line, engineered specifically for low-current voltage regulation in harsh-environment electronic control units and battery-sensitive systems.
FAQ
What is the maximum reverse voltage this diode can withstand before breakdown?
The BZX38450-C7V5-Q has a nominal Zener voltage of 7.5 V, with guaranteed breakdown occurring between 7.13 V and 7.88 V at 50 µA test current. It is not rated for continuous operation above its specified VZ range - sustained reverse voltage beyond 7.88 V risks thermal runaway unless current is strictly limited by external series resistance.
Can this Zener be used in forward conduction mode?
Yes - its forward voltage is ≤0.9 V at 10 mA, making it usable as a low-drop rectifier or polarity protection element. However, its primary design intent and characterization are for reverse-bias Zener regulation; forward characteristics are secondary and not optimized for high-current switching.
How does the ±5 % tolerance affect circuit accuracy in a 7.5 V reference design?
With ±5 % tolerance, the actual Zener voltage falls between 7.13 V and 7.88 V at 50 µA. In precision reference applications, this introduces up to ±4.5 % error in derived voltages - acceptable for non-critical biasing but insufficient for ADC references requiring <1 % accuracy without post-calibration or trimming.
Is thermal derating required above 25 °C ambient?
Yes - total power dissipation must be linearly derated above 25 °C ambient at 2.4 mW/°C (based on Rth(j-a) = 415 K/W). At 85 °C ambient, maximum allowable power drops to approximately 156 mW to maintain junction temperature ≤150 °C, requiring careful PCB copper area planning.
BZX38450-C7V5-QF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX38450-Q
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 7.5 V
- Tolerance:
- ±5%
- Power - Max:
- 300 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:
- SOD-323
BZX38450-C7V5-QF FAQ
1.How can I place an order for BZX38450-C7V5-QF through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-C7V5-QF 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 BZX38450-C7V5-QF reliable?
The price and inventory of BZX38450-C7V5-QF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX38450-C7V5-QF is usually 5 days.
3.What payment methods are accepted for BZX38450-C7V5-QF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-C7V5-QF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-C7V5-QF?
BZX38450-C7V5-QF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-C7V5-QF 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 BZX38450-C7V5-QF?
For technical support, including BZX38450-C7V5-QF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-C7V5-QF requirements.
6.How does Aetrix verify that BZX38450-C7V5-QF is sourced from the original manufacturer or authorized distributors?
All BZX38450-C7V5-QF 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 BZX38450-C7V5-QF meets industry standards.
7.What is the process for return or replacement of BZX38450-C7V5-QF?
All BZX38450-C7V5-QF units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-C7V5-QF, 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 BZX38450-C7V5-QF part is unused and in its original packaging.
Return procedure for BZX38450-C7V5-QF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-C7V5-QF 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
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
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SMAZ12-13-F
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