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Nexperia USA Inc. BZX38450-B7V5X
- Part No.:
- BZX38450-B7V5X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-B7V5X.pdf
- Description:
- DIODE ZENER 7.5V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:2,278
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Product details
Overview
BZX38450-B7V5X from Nexperia is a low-current Zener voltage regulator diode in SOD323 (SC-76) package, designed for precision biasing and voltage reference in ultra-low-power circuits. It delivers a nominal 7.5 V regulation at 50 µA test current, with ±2 % 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-B7V5X datasheet, BZX38450-B7V5X pinout, BZX38450-B7V5X application, or BZX38450-B7V5X equivalent, key selection criteria include its 7.5 V nominal Zener voltage, 50 µA low-current regulation point, 300 mW power rating, SOD323 footprint compatibility, and intentional leakage optimization for noise-sensitive analog front-ends.
Technical Context
This Zener diode operates in reverse breakdown mode with tightly controlled VZ = 7.35 V to 7.65 V (B-series ±2 %) at IZ = 50 µA. Its low test current enables minimal quiescent draw in always-on monitoring circuits, while the 80 Ω dynamic impedance ensures predictable regulation under small-signal load variations.
The device features an optimized leakage profile per AN90031, supporting fast switching transitions and reduced broadband noise in reference paths. Thermal resistance from junction to ambient is 415 K/W on FR4 PCB, limiting continuous dissipation to 300 mW at Tamb ≤ 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 7.35 V to 7.65 V at IZ = 50 µA - defines precise reference level for low-bias analog circuits |
| Differential Resistance rdiff | 80 Ω at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Temperature Coefficient SZ | +2.5 mV/K - quantifies VZ drift over temperature for stability-critical references |
| Forward Voltage VF | ≤ 0.9 V at IF = 10 mA - sets forward conduction loss in clamp or protection configurations |
| Total Power Dissipation Ptot | 300 mW at Tamb ≤ 25 °C - constrains maximum steady-state thermal design margin |
| Junction Temperature Tj | −55 °C to +150 °C - defines operational envelope for industrial and extended-temperature applications |
| Reverse Current IR | ≤ 0.1 µA at VR = 5.7 V - specifies leakage below regulation threshold for high-impedance bias networks |
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; polarity must be observed for correct Zener breakdown orientation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path for regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low-test-current regulation | Specified at 50 µA - enables use in nanoampere-bias sensor interfaces without loading error |
| Tight voltage tolerance | ±2 % (B-series) - reduces calibration overhead in precision reference designs |
| Optimized leakage profile | Intentional minor IR rise per AN90031 - improves transient response and lowers broadband noise in reference paths |
| Small-footprint packaging | SOD323 (1.7 × 1.25 mm) - supports high-density layout in space-constrained wearables and IoT modules |
| Thermal robustness | 150 °C max junction temperature - sustains reliability in sealed enclosures with limited airflow |
Applications
| Portable Sensor Biasing | Low-Power ADC Reference |
|---|---|
|
Use Scenario: Providing stable excitation voltage to MEMS pressure sensors in battery-operated environmental monitors. IC Role / Device Role / Timing Role: Zener voltage reference establishing fixed bias point for sensor bridge circuitry. Use Value: 7.5 V output with ±2 % tolerance and <0.1 µA leakage ensures measurement accuracy without draining coin-cell batteries. |
Use Scenario: Supplying reference voltage to 12-bit SAR ADCs in handheld medical diagnostic devices. IC Role / Device Role / Timing Role: Precision analog reference source for analog-to-digital conversion. Use Value: 80 Ω dynamic impedance and +2.5 mV/K tempco enable <±0.5 LSB drift over 0–70 °C operating range. |
| IoT Node Voltage Clamp | EEPROM Write Protection |
|
Use Scenario: Clamping microcontroller I/O pins against ESD transients in wireless edge nodes. IC Role / Device Role / Timing Role: Low-leakage Zener clamp absorbing surge energy while minimizing standby current. Use Value: 300 mW power rating and optimized leakage support fast transient suppression without compromising sleep-mode battery life. |
Use Scenario: Preventing accidental write operations during brown-out conditions in embedded firmware storage. IC Role / Device Role / Timing Role: Voltage supervisor element triggering reset logic when supply drops below 7.5 V threshold. Use Value: Sharp knee at 7.5 V with 50 µA test point allows deterministic trip-point setting using simple resistor divider networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX38450-C7V5 | ±5 % tolerance (7.13–7.88 V), higher leakage at VR = 5.7 V (0.1 µA vs. B-series' 0.1 µA - same value but looser spec) | Acceptable where calibration compensates for wider VZ spread; less suitable for uncalibrated systems | Select for cost-sensitive designs where post-assembly trimming is available |
| MMSZ5236B-7-F | 7.5 V ±5 %, 500 mW rating, SOD-123 package (2.7 × 1.6 mm), 100 Ω rdiff at 20 mA | Larger footprint and higher power - better for higher-current references but incompatible with ultra-dense layouts | Choose when board space permits and >300 mW dissipation margin is required |
Compared with BZX38450-C7V5, the BZX38450-B7V5X offers tighter tolerance and identical leakage, making it preferable for uncalibrated precision references; versus MMSZ5236B-7-F, it trades off power headroom for 35 % smaller area and lower dynamic impedance at low currents.
Availability
BZX38450-B7V5X is available at Aetrix Electronics and suitable for portable sensor biasing, low-power ADC reference, IoT node voltage clamping, and EEPROM write protection requiring stable component supply across high-mix, low-volume production runs.
Supply support for BZX38450-B7V5X 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-performance, reliable standard-logic and discrete components for automotive, industrial, and consumer markets.
The BZX38450 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for battery-powered and noise-sensitive analog applications demanding tight voltage tolerance at microampere bias levels.
FAQ
What is the maximum continuous reverse power dissipation for BZX38450-B7V5X?
The BZX38450-B7V5X has a total power dissipation limit of 300 mW at ambient temperatures ≤25 °C when mounted on a standard FR4 PCB with single-sided copper. Derating is required above 25 °C at 2.4 mW/°C based on its 415 K/W junction-to-ambient thermal resistance.
Does BZX38450-B7V5X support bidirectional ESD protection?
No - BZX38450-B7V5X is a unidirectional Zener diode configured only for reverse-bias regulation. Its anode and cathode terminals are not symmetrical; it provides no meaningful clamping in forward bias beyond typical silicon diode conduction (~0.9 V), and is not rated for IEC 61000-4-2 ESD events.
How does the "B" suffix differ from "C" in the BZX38450 series?
The "B" suffix denotes ±2 % Zener voltage tolerance (e.g., 7.35–7.65 V for 7.5 V nominal), while "C" indicates approximately ±5 % (e.g., 7.13–7.88 V). Both share identical package, thermal specs, and leakage optimization per AN90031, but "B" parts are selected for tighter regulation accuracy.
Can BZX38450-B7V5X be used in series for higher reference voltages?
Yes - multiple BZX38450-B7V5X diodes may be stacked in series to achieve higher reference voltages (e.g., two in series yield ~15 V), but cumulative tolerance, tempco, and dynamic impedance increase linearly. Ensure total power dissipation remains within 300 mW per device and verify thermal coupling effects on stability.
BZX38450-B7V5X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX38450
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 7.5 V
- Tolerance:
- ±2%
- 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-B7V5X FAQ
1.How can I place an order for BZX38450-B7V5X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-B7V5X 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-B7V5X reliable?
The price and inventory of BZX38450-B7V5X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX38450-B7V5X is usually 5 days.
3.What payment methods are accepted for BZX38450-B7V5X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-B7V5X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-B7V5X?
BZX38450-B7V5X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-B7V5X 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-B7V5X?
For technical support, including BZX38450-B7V5X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-B7V5X requirements.
6.How does Aetrix verify that BZX38450-B7V5X is sourced from the original manufacturer or authorized distributors?
All BZX38450-B7V5X 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-B7V5X meets industry standards.
7.What is the process for return or replacement of BZX38450-B7V5X?
All BZX38450-B7V5X units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-B7V5X, 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-B7V5X part is unused and in its original packaging.
Return procedure for BZX38450-B7V5X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-B7V5X 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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