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Nexperia USA Inc. BZX38450-C10X
- Part No.:
- BZX38450-C10X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-C10X.pdf
- Description:
- DIODE ZENER 10V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:35,675
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Product details
Overview
BZX38450-C10X 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 provides a nominal 10 V regulation at 50 µA test current, with ±5 % tolerance, 300 mW power dissipation, and 90 Ω differential resistance at 5 mA - optimized for portable battery-powered systems and sensor signal conditioning.
For engineers reviewing the BZX38450-C10X datasheet, BZX38450-C10X pinout, BZX38450-C10X application, or BZX38450-C10X equivalent, key selection criteria include its low 50 µA regulation current, intentional leakage optimization for noise reduction (per AN90031), SOD323 footprint compatibility, and thermal resistance of 110 K/W to solder point - critical for space-constrained, thermally sensitive designs.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified working voltage of 9.50 V to 10.50 V at IZ = 50 µA, exhibiting a temperature coefficient of +4.5 mV/K and reverse current ≤ 0.1 µA at VR = 7.6 V. Its differential resistance drops to 90 Ω at 5 mA, enabling stable regulation under light load variations.
The device features intentionally elevated leakage current versus standard B-series variants (per AN90031), improving switching speed and reducing high-frequency noise in reference paths. Thermal performance is characterized by Rth(j-a) = 415 K/W (free air) and Rth(j-sp) = 110 K/W (to cathode solder point), supporting reliable operation up to 150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Regulation Voltage (VZ) | 9.50 V to 10.50 V at IZ = 50 µA - defines precise reference point for low-bias analog circuits |
| Tolerance | ±5 % - supports cost-sensitive designs where tighter tolerance is not required |
| Differential Resistance (rdiff) | 90 Ω at IZ = 5 mA - ensures minimal output voltage shift under small load changes |
| Forward Voltage (VF) | ≤ 0.9 V at IF = 10 mA - enables use as low-drop rectifier or clamp in dual-role applications |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard FR4 PCB |
| Junction Temperature (Tj) | −55 °C to +150 °C - allows deployment in extended industrial environments |
| Thermal Resistance (Rth(j-sp)) | 110 K/W to cathode solder point - informs thermal design margin when mounted on compact PCBs |
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; marking bar identifies this terminal for correct PCB orientation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; reverse-biased configuration establishes Zener breakdown |
Key Features
| Feature | Design Value |
|---|---|
| Low test current regulation | Specified at 50 µA - enables stable reference generation in µA-level standby circuits |
| Optimized leakage profile | Intentional minor rise vs. B-series (AN90031) - reduces switching transients and broadband noise in precision references |
| Small-footprint packaging | SOD323 outline with 1.3 mm pitch - supports high-density layout in wearables and IoT edge nodes |
| Thermal performance | Rth(j-sp) = 110 K/W - improves power handling reliability when soldered directly to copper pour |
| Wide operating temperature | −55 °C to +150 °C ambient - suitable for under-hood or industrial control module deployments |
Applications
| Portable Sensor Biasing | Low-Power Reference Supply |
|---|---|
Use Scenario: Providing stable excitation voltage to MEMS pressure sensors in battery-operated environmental monitors. IC Role / Device Role / Timing Role: Zener voltage reference diode delivering 10 V bias at sub-100 µA quiescent current. Use Value: Enables consistent sensor output scaling across 10-year battery life due to low 50 µA regulation current and <0.1 µA leakage at 7.6 V. |
Use Scenario: Generating a clean 10 V reference for 12-bit ADCs in handheld medical diagnostic tools. IC Role / Device Role / Timing Role: Precision voltage reference element in ratiometric measurement front-end. Use Value: Delivers ±5 % accuracy and 90 Ω dynamic impedance to minimize code-to-code reference drift during sampling. |
| USB-C Power Path Clamp | IoT Node Voltage Supervisor |
Use Scenario: Clamping transient overvoltage on 5 V USB-C auxiliary power lines in smart home hubs. IC Role / Device Role / Timing Role: Reverse-biased Zener acting as fast-acting shunt protector. Use Value: Responds within nanoseconds to surges up to 40 W (100 µs pulse) while maintaining <0.1 µA leakage in normal operation. |
Use Scenario: Monitoring 12 V rail integrity in LPWA gateways using discrete brown-out detection. IC Role / Device Role / Timing Role: Voltage threshold detector via comparator input referenced to 10 V Zener. Use Value: Supports accurate 10 V trip point with +4.5 mV/K tempco compensated in firmware, enabling reliable reset across −40 °C to +85 °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 |
|---|---|---|---|
| BZX38450-B10 | ±2 % tolerance, lower leakage (<0.05 µA at 7.6 V), no intentional leakage optimization | Better long-term stability in metrology-grade references; less effective for noise-sensitive switching nodes | Select for highest initial accuracy where thermal drift dominates; avoid if fast transient suppression is required |
| MMSZ5240B | Same 10 V nominal, ±5 %, but SOD-123 package (2.7 mm × 1.6 mm), higher Ptot = 500 mW, rdiff = 170 Ω | Higher power handling suits higher-current biasing; larger footprint limits ultra-dense layouts | Choose when board space permits and >300 mW dissipation is needed; not drop-in compatible due to package mismatch |
Compared with BZX38450-C10X, the BZX38450-B10 offers tighter tolerance but lacks noise-reduction leakage tuning, while MMSZ5240B trades miniaturization for higher power and relaxed dynamic impedance - making C10X optimal for space-constrained, low-noise, battery-critical applications.
Availability
BZX38450-C10X is available at Aetrix Electronics and suitable for portable sensor biasing, low-power reference supplies, USB-C power path clamping, and IoT node voltage supervision requiring stable component supply across multi-year production cycles.
Supply support for BZX38450-C10X 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 essential efficiency technologies, delivering high-performance, reliable discrete and logic devices for automotive, industrial, and consumer markets.
The BZX38450 series belongs to Nexperia's low-current Zener regulator portfolio, engineered specifically for ultra-low-power voltage reference and biasing in battery-operated and space-constrained electronic systems.
FAQ
What is the exact regulation voltage range for BZX38450-C10X at 50 µA?
The BZX38450-C10X delivers a guaranteed working voltage of 9.50 V to 10.50 V when tested at IZ = 50 µA and Tj = 25 °C, per Table 8 of the Rev. 4 datasheet. This ±5 % tolerance band is validated across production lots and forms the basis for reference accuracy in low-bias applications.
Does BZX38450-C10X support surge protection, and what are its pulse ratings?
Yes - it supports non-repetitive peak reverse power dissipation up to 40 W for 100 µs square-wave pulses at Tj = 25 °C, as defined in Table 5. This capability enables transient clamping in low-energy surge events, though sustained operation must remain within the 300 mW DC limit.
How does the "intentional minor rise of leakage current" benefit circuit performance?
Per Application Note AN90031, the controlled leakage increase in C-series devices reduces high-frequency noise and accelerates turn-on/turn-off response in reference paths. This yields cleaner voltage rails in ADC reference chains and faster settling in feedback loops compared to standard B-series Zeners.
Can BZX38450-C10X be used in forward conduction mode, and what is its forward voltage?
Yes - it functions as a standard silicon diode in forward bias, with VF ≤ 0.9 V at IF = 10 mA (Table 7). This allows dual-use in clamp-or-rectify topologies, though its primary design intent remains reverse-bias Zener regulation at low currents.
BZX38450-C10X 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):
- 10 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 20 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 7.6 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-C10X FAQ
1.How can I place an order for BZX38450-C10X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-C10X 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-C10X reliable?
The price and inventory of BZX38450-C10X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX38450-C10X is usually 5 days.
3.What payment methods are accepted for BZX38450-C10X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-C10X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-C10X?
BZX38450-C10X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-C10X 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-C10X?
For technical support, including BZX38450-C10X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-C10X requirements.
6.How does Aetrix verify that BZX38450-C10X is sourced from the original manufacturer or authorized distributors?
All BZX38450-C10X 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-C10X meets industry standards.
7.What is the process for return or replacement of BZX38450-C10X?
All BZX38450-C10X units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-C10X, 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-C10X part is unused and in its original packaging.
Return procedure for BZX38450-C10X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-C10X Tags
-
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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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
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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