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Nexperia USA Inc. BZX38450-C7V5X
- Part No.:
- BZX38450-C7V5X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-C7V5X.pdf
- Description:
- DIODE ZENER 7.5V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:736
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Product details
Overview
BZX38450-C7V5X from Nexperia is a low-current Zener voltage regulator diode in SOD323 (SC-76) package, designed for precision voltage reference and biasing in ultra-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 2.5 mV/K temperature coefficient - enabling stable operation in battery-powered sensor nodes and portable instrumentation.
For engineers reviewing the BZX38450-C7V5X datasheet, BZX38450-C7V5X pinout, BZX38450-C7V5X application, or BZX38450-C7V5X equivalent, this page provides verified electrical parameters, thermal behavior, cathode/anode terminal mapping, and validated alternative parts for low-current Zener replacement in space-constrained designs.
Technical Context
This Zener diode operates in reverse breakdown mode with specified regulation at IZ = 50 µA - optimized for minimal quiescent current draw in always-on monitoring circuits. Its intentional leakage profile (per AN90031) supports fast switching transients and reduced noise coupling in analog front-ends.
The device exhibits a positive temperature coefficient of +2.5 mV/K above 6 V, ensuring predictable drift in ambient-varying environments. Thermal resistance from junction to solder point is 110 K/W, confirming suitability for FR4 PCBs with standard single-sided copper footprints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 7.5 V at IZ = 50 µA - defines precise reference point for low-bias voltage stabilization |
| Tolerance | ±5 % - enables cost-effective selection where tight regulation is not required |
| Differential Resistance | 80 Ω at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Temperature Coefficient | +2.5 mV/K - quantifies voltage drift per degree Celsius rise in junction temperature |
| Forward Voltage | 0.9 V at IF = 10 mA - sets forward conduction threshold for polarity-sensitive protection |
| Total Power Dissipation | 300 mW at Tamb ≤ 25 °C - limits maximum continuous power handling on standard FR4 PCB |
| Junction-to-Solder-Point Rth | 110 K/W - informs thermal design margin when mounted on cathode tab |
Pinout & Package
SOD323 (SC-76) surface-mount plastic package: 1.7 mm × 1.25 mm × 0.95 mm body, 1.3 mm lead pitch, marking bar denotes cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; accepts reverse bias for Zener operation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-biased path |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - reduces standby power in energy-harvesting and coin-cell applications |
| Optimized leakage profile | Intentional minor leakage rise (BZX38450-C series) - improves transient response and noise immunity |
| Small-footprint packaging | SOD323 outline with 1.3 mm pitch - enables high-density layout in wearables and IoT edge sensors |
| Controlled temperature drift | +2.5 mV/K coefficient - allows predictable compensation in temperature-sensitive references |
Applications
| Portable Sensor Biasing | Low-Power ADC Reference |
|---|---|
Use Scenario: Providing stable bias voltage to MEMS pressure sensors in battery-operated environmental monitors. IC Role / Device Role / Timing Role: Zener voltage reference supplying fixed 7.5 V to sensor excitation circuitry. Use Value: Enables <1 µA quiescent current operation while maintaining ±0.375 V regulation window across −40 °C to +85 °C. |
Use Scenario: Generating reference voltage for 12-bit SAR ADCs in handheld medical diagnostic tools. IC Role / Device Role / Timing Role: Precision DC reference source replacing larger TO-92 Zeners. Use Value: Delivers 7.5 V ±5 % with 80 Ω dynamic impedance, minimizing code-width error under varying supply loads. |
| IoT Node Power Sequencing | USB-C Port Protection Clamping |
Use Scenario: Establishing clean enable thresholds for LDOs during cold-start sequencing in NB-IoT modules. IC Role / Device Role / Timing Role: Voltage threshold detector via reverse-biased Zener clamp. Use Value: Provides repeatable 7.5 V turn-on point with <0.1 µA leakage at VR = 6.5 V, ensuring reliable state transitions. |
Use Scenario: Secondary overvoltage clamp on USB-C VBUS line in accessory dongles. IC Role / Device Role / Timing Role: Fast-reacting shunt protector limiting transient spikes to 7.5 V. Use Value: Responds within nanoseconds to ESD events due to low capacitance (150 pF at 0 V), without loading normal 5 V operation. |
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 | ±2 % tolerance, 160 Ω rdiff at 5 mA, +2.5 mV/K SZ | Higher precision but higher dynamic impedance - better for stable-load references, worse for pulsed loads | Select when tighter voltage accuracy outweighs need for low impedance |
| MMSZ5236B | ±5 % tolerance, 15 Ω rdiff at 20 mA, +2.0 mV/K SZ, SOD-123 package | Lower impedance but requires 20 mA test current - unsuitable for sub-100 µA systems | Select only if circuit can support ≥20 mA Zener current and board area permits larger SOD-123 footprint |
Compared with BZX38450-C7V5X, BZX384-B7V5 offers tighter tolerance at the cost of higher impedance, while MMSZ5236B delivers lower impedance but demands 400× more test current - making the C-series optimal for microampere-biased, space-constrained regulation.
Availability
BZX38450-C7V5X is available at Aetrix Electronics and suitable for portable sensor biasing, low-power ADC reference, and IoT node power sequencing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZX38450-C7V5X 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 and industrial-grade components.
The BZX38450 series belongs to Nexperia's low-current Zener portfolio, engineered specifically for ultra-low-power voltage reference and biasing in battery-operated and space-constrained electronics.
FAQ
What is the maximum reverse voltage the BZX38450-C7V5X can withstand before breakdown?
The BZX38450-C7V5X has a nominal Zener voltage of 7.5 V at 50 µA, with a guaranteed minimum breakdown voltage of 7.13 V and maximum of 7.88 V. It is not rated for sustained operation above its specified VZ range - exceeding 7.88 V risks uncontrolled conduction or thermal runaway unless current-limited by external series resistance.
Can this Zener diode be used in forward-biased configuration?
Yes - the BZX38450-C7V5X exhibits a forward voltage of 0.9 V at 10 mA, consistent with standard silicon PN junction behavior. It may serve as a low-drop rectifier or polarity protection element, though its primary design intent and characterization are for reverse-biased Zener regulation.
How does the "C" suffix differ from "B" in the BZX38450 series?
The "C" suffix denotes ±5 % tolerance and an intentionally modified leakage profile per AN90031 - optimized for faster switching and lower noise in dynamic applications. The "B" variant offers ±2 % tolerance but higher differential resistance and standard leakage, targeting static reference use cases.
Is thermal derating required when operating above 25 °C ambient?
Yes - total power dissipation must be linearly derated above 25 °C using the junction-to-ambient thermal resistance of 415 K/W. For example, at 85 °C ambient, maximum allowable power drops to 174 mW ((150 °C − 85 °C) × 2.4 mW/K), requiring careful current limiting in thermally constrained layouts.
BZX38450-C7V5X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- 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:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX38450-C7V5X FAQ
1.How can I place an order for BZX38450-C7V5X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-C7V5X 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-C7V5X reliable?
The price and inventory of BZX38450-C7V5X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX38450-C7V5X is usually 5 days.
3.What payment methods are accepted for BZX38450-C7V5X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-C7V5X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-C7V5X?
BZX38450-C7V5X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-C7V5X 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-C7V5X?
For technical support, including BZX38450-C7V5X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-C7V5X requirements.
6.How does Aetrix verify that BZX38450-C7V5X is sourced from the original manufacturer or authorized distributors?
All BZX38450-C7V5X 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-C7V5X meets industry standards.
7.What is the process for return or replacement of BZX38450-C7V5X?
All BZX38450-C7V5X units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-C7V5X, 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-C7V5X part is unused and in its original packaging.
Return procedure for BZX38450-C7V5X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-C7V5X 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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