My Inquiry
My Account
Nexperia USA Inc. BZX38450-C7V5-QX
- Part No.:
- BZX38450-C7V5-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-C7V5-QX.pdf
- Description:
- DIODE ZENER 7.5V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:6,476
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX38450-C7V5-Q from Nexperia is a low-current Zener voltage regulator diode in SOD323 (SC-76) package, designed for precision voltage reference and biasing in low-power circuits. It delivers a nominal 7.5 V regulation at 50 µA test current, with ±5 % tolerance, 80 Ω differential resistance at 5 mA, 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 page provides verified electrical parameters, thermal behavior, automotive-grade reliability data, and real-world implementation guidance for battery-powered and space-constrained systems.
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. Its low 50 µA test current enables stable regulation in ultra-low-bias applications such as sensor biasing and microcontroller reset circuits.
The device features 80 Ω dynamic impedance at 5 mA, 150 pF junction capacitance at 0 V, and leakage current ≤ 0.1 µA at 5.7 V reverse voltage. Thermal resistance from junction to ambient is 415 K/W on FR4 PCB, supporting operation from −55 °C to +150 °C ambient.
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 - enables cost-optimized selection where tight regulation is not critical) |
| Differential Resistance | 80 Ω at IZ = 5 mA (low impedance ensures minimal voltage shift under small load variations) |
| Forward Voltage | ≤ 0.9 V at IF = 10 mA (supports reliable anode-cathode conduction during power-up or fault conditions) |
| Power Dissipation | 300 mW at Tamb ≤ 25 °C (limits thermal rise on standard FR4 PCB with single-sided copper) |
| Junction Temperature | −55 °C to +150 °C (enables deployment in under-hood automotive modules and industrial edge sensors) |
| AEC-Q101 Qualified | Yes (certified for automotive discrete semiconductor stress testing - supports functional safety-aware designs) |
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 output node; marking bar identifies this terminal - reverse-biased during Zener operation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes bias path for controlled breakdown conduction |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables use in micropower sensor interfaces and coin-cell-powered devices without loading error |
| Optimized leakage profile | Intentional minor IR increase per AN90031 - improves switching speed and reduces noise in feedback paths |
| Automotive qualification | AEC-Q101 compliant - validated for vibration, temperature cycling, and ESD robustness required in vehicle ECUs |
| Small-footprint packaging | SOD323 footprint occupies < 2.2 mm² PCB area - ideal for wearables, TWS earbuds, and compact IoT nodes |
| Stable temperature coefficient | +2.5 mV/K near 7.5 V - predictable drift behavior simplifies compensation in analog front-ends |
Applications
| Automotive Cabin Sensors | Industrial Pressure Transmitters |
|---|---|
Use Scenario: Providing stable 7.5 V reference for MEMS pressure sensor signal conditioning in HVAC control modules. IC Role / Device Role / Timing Role: Zener voltage reference for op-amp biasing and ADC reference scaling. Use Value: AEC-Q101 qualification ensures long-term stability across −40 °C to +105 °C operating range without calibration drift. |
Use Scenario: Supplying precise bias voltage to bridge amplifier circuitry in 4–20 mA loop-powered transmitters. IC Role / Device Role / Timing Role: Low-current shunt regulator maintaining constant excitation for Wheatstone bridge elements. Use Value: 80 Ω dynamic impedance minimizes output variation when bridge current changes by ±100 µA. |
| Portable Medical Pulse Oximeters | Smart Home Smoke Detectors |
Use Scenario: Generating clean 7.5 V rail for LED driver ICs and photodiode transimpedance amplifiers in battery-operated pulse oximetry units. IC Role / Device Role / Timing Role: Low-power voltage clamp regulating supply to optical subsystems during intermittent measurement cycles. Use Value: 50 µA test current allows regulation with < 1 µA quiescent draw - extends CR2032 battery life beyond 2 years. |
Use Scenario: Establishing reference voltage for electrochemical CO sensor biasing and microcontroller brown-out detection in battery-backed smoke alarms. IC Role / Device Role / Timing Role: Zener-based threshold detector enabling reliable low-voltage warning at 7.5 V system rail. Use Value: ±5 % tolerance and +2.5 mV/K TC allow accurate end-of-life voltage monitoring across storage temperatures up to +60 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B7V5 | Same 7.5 V nominal, ±2 % tolerance, higher 160 Ω rdiff at 5 mA, no AEC-Q101 qualification | Lacks automotive qualification; suitable only for commercial-grade consumer electronics | Select when tighter voltage tolerance is required and automotive reliability is unnecessary |
| MMSZ5236B-TP | 7.5 V nominal, ±5 %, 350 mW Ptot, SOD-123 package (2.7 mm × 1.6 mm), 100 Ω rdiff | Larger footprint and higher thermal resistance (500 K/W) - less suitable for ultra-dense layouts | Choose when higher power margin is needed and board space permits larger package |
Compared with BZX38450-C7V5-Q, the BZX384-B7V5 offers tighter tolerance but lacks automotive qualification and has higher impedance, while MMSZ5236B-TP trades compactness and thermal performance for greater power handling - making the C7V5-Q optimal for AEC-Q101–compliant, space-constrained, low-bias designs.
Availability
BZX38450-C7V5-Q is available at Aetrix Electronics and suitable for automotive cabin sensors, industrial pressure transmitters, portable medical pulse oximeters, and smart home smoke detectors requiring stable component supply across extended temperature ranges and long product 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 leading global semiconductor manufacturer specializing in high-performance, high-reliability discrete and logic devices, with core expertise in automotive-qualified components and energy-efficient solutions.
The BZX38450-Q series belongs to Nexperia's automotive-grade Zener diode portfolio, engineered specifically for low-current voltage reference and biasing in harsh-environment electronics where AEC-Q101 compliance and miniature packaging are mandatory.
FAQ
What is the maximum reverse voltage before breakdown for BZX38450-C7V5-Q?
The device exhibits a sharp reverse breakdown characteristic beginning at 7.13 V (minimum specified Zener voltage at 50 µA). It is not rated for continuous operation above 7.88 V - exceeding this value risks uncontrolled current flow and thermal runaway unless externally limited by series resistance.
Can BZX38450-C7V5-Q be used in parallel for higher current capability?
No - Zener diodes exhibit manufacturing variance in breakdown voltage, causing current hogging in parallel configurations. Even matched units risk thermal instability due to positive temperature coefficient; use a single higher-power Zener or active regulation instead.
How does the +2.5 mV/K temperature coefficient affect accuracy over temperature?
Over a 100 °C range (−40 °C to +60 °C), the Zener voltage shifts by +250 mV - approximately +3.3 % of nominal 7.5 V. For precision references, this drift must be compensated via circuit design or selected alongside TC-matched components.
Is the SOD323 package compatible with standard reflow soldering profiles?
Yes - Nexperia specifies compatibility with JEDEC J-STD-020D reflow profiles. The recommended peak temperature is 260 °C for ≤ 30 seconds, with preheat ramp rate ≤ 3 °C/s and cooling rate ≥ 1 °C/s to avoid package cracking or delamination.
BZX38450-C7V5-QX 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-QX FAQ
1.How can I place an order for BZX38450-C7V5-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-C7V5-QX 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-QX reliable?
The price and inventory of BZX38450-C7V5-QX 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-QX is usually 5 days.
3.What payment methods are accepted for BZX38450-C7V5-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-C7V5-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-C7V5-QX?
BZX38450-C7V5-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-C7V5-QX 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-QX?
For technical support, including BZX38450-C7V5-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-C7V5-QX requirements.
6.How does Aetrix verify that BZX38450-C7V5-QX is sourced from the original manufacturer or authorized distributors?
All BZX38450-C7V5-QX 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-QX meets industry standards.
7.What is the process for return or replacement of BZX38450-C7V5-QX?
All BZX38450-C7V5-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-C7V5-QX, 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-QX part is unused and in its original packaging.
Return procedure for BZX38450-C7V5-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-C7V5-QX 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
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
