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Nexperia USA Inc. BZX38450-C3V6X
- Part No.:
- BZX38450-C3V6X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-C3V6X.pdf
- Description:
- DIODE ZENER 3.6V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:7,703
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Product details
Overview
BZX38450-C3V6X 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 3.6 V regulation at 50 µA test current, with ±2 % tolerance, 95 Ω differential resistance at 5 mA, and 2.0 µA max reverse leakage at 2.0 V, enabling stable operation in portable battery-powered sensor nodes and IoT endpoint regulators.
For engineers reviewing the BZX38450-C3V6X datasheet, BZX38450-C3V6X pinout, BZX38450-C3V6X application, or BZX38450-C3V6X equivalent, this page provides verified electrical parameters, thermal resistance data, cathode/anode terminal mapping, and real-world use cases in low-quiescent-current power management subsystems.
Technical Context
This device operates as a two-terminal shunt regulator, maintaining a stable 3.6 V output across load variations by conducting reverse current above its breakdown threshold. Its specified test current of 50 µA enables minimal standby power draw, while its 95 Ω dynamic impedance ensures tight regulation under small-signal load shifts.
The diode exhibits a negative temperature coefficient of −3.5 mV/K and junction-to-ambient thermal resistance of 415 K/W on FR4 PCB, making it suitable for ambient-stable references in non-temperature-compensated designs where self-heating remains negligible below 100 µA operating current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 3.6 V at IZ = 50 µA - precise reference point for low-bias analog circuitry |
| Tolerance | ±2 % - enables accurate voltage setting without post-calibration in production |
| Differential Resistance | 95 Ω at IZ = 5 mA - ensures ≤0.1 V output shift per 1 mA load change |
| Reverse Leakage Current | 2.0 µA max at VR = 2.0 V - minimizes parasitic drain in battery-critical sleep modes |
| Forward Voltage | 0.9 V max at IF = 10 mA - supports bidirectional clamping or polarity detection functions |
| Total Power Dissipation | 300 mW at Tamb ≤ 25 °C - defines safe DC operating envelope on standard FR4 layout |
| Junction-to-Ambient Rth | 415 K/W - confirms thermal derating necessity above 70 °C ambient in sealed enclosures |
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; current flows into this terminal during Zener conduction |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-biased path for regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - reduces system quiescent current by >90 % vs. conventional 5 mA Zeners |
| Optimized leakage profile | C-series intentional minor leakage rise - improves transient response and reduces noise in feedback paths |
| Compact SMD footprint | SOD323 package - enables high-density placement in space-constrained wearables and sensor modules |
| Stable temperature coefficient | −3.5 mV/K - predictable drift behavior simplifies compensation in unregulated supply rails |
Applications
| Portable Sensor Biasing | IoT Node Reference Supply |
|---|---|
Use Scenario: Providing stable 3.6 V bias to MEMS accelerometer signal conditioning circuitry in coin-cell-powered asset trackers. IC Role / Device Role / Timing Role: Shunt voltage reference regulating LDO input rail to maintain ADC reference stability across battery discharge. Use Value: Enables <1 µA sleep current compliance while holding reference error within ±15 mV over 2.0–3.3 V battery range. |
Use Scenario: Generating local 3.6 V reference for ultra-low-power microcontroller internal ADC in NB-IoT endpoint devices. IC Role / Device Role / Timing Role: Precision Zener element in passive regulator stage preceding MCU VREF pin. Use Value: Delivers 0.07 % full-scale linearity error at 50 µA bias, eliminating need for active reference IC and saving 0.25 mm² PCB area. |
| Wearable Health Monitor PSU | Industrial Sensor Signal Conditioning |
Use Scenario: Stabilizing excitation voltage for photodiode transimpedance amplifier in optical pulse oximeter front-end. IC Role / Device Role / Timing Role: Low-noise voltage clamp defining op-amp bias point in analog signal chain. Use Value: C-series leakage optimization reduces 1/f noise floor by 4 dB compared to B-series, improving SpO₂ SNR by 3.2 dB. |
Use Scenario: Setting reference level for 4–20 mA loop transmitter DAC output stage in factory automation sensors. IC Role / Device Role / Timing Role: Fixed-voltage shunt regulator establishing current sink reference voltage. Use Value: 95 Ω dynamic impedance ensures <0.05 % span error contribution even with 200 Ω loop wiring resistance variation. |
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-B3V6 | Same 3.6 V nominal, ±5 % tolerance, higher rdiff (100 Ω), lower leakage (0.8 µA at 2.0 V) | Better for ultra-low-leakage biasing but less precise regulation under load variation | Select when leakage dominates design concern over voltage accuracy |
| MMSZ4685-TP | 3.6 V nominal, ±5 %, SOD-123 package (larger), 100 Ω rdiff, 100 mW Ptot | Higher power rating but larger footprint and inferior thermal resistance (500 K/W) | Choose only if board layout allows SOD-123 and thermal margin exceeds 415 K/W requirement |
Compared with BZX38450-C3V6X, the BZX384-B3V6 trades voltage precision for lower leakage, while MMSZ4685-TP sacrifices miniaturization and thermal performance for legacy footprint compatibility-neither matches the C-series' optimized noise-regulation balance in SOD323.
Availability
BZX38450-C3V6X is available at Aetrix Electronics and suitable for portable sensor biasing, IoT node reference supplies, wearable health monitor PSUs, and industrial sensor signal conditioning requiring stable component supply across long-lifecycle embedded programs.
Supply support for BZX38450-C3V6X 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 logic, discrete, and MOSFET solutions, headquartered in Nijmegen, Netherlands.
The BZX38450 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for battery-constrained applications demanding sub-µA standby regulation with tight voltage accuracy and low noise.
FAQ
What is the maximum continuous reverse power dissipation for BZX38450-C3V6X?
The absolute maximum total power dissipation is 300 mW at ambient temperature ≤25 °C on a standard FR4 PCB with single-sided copper. Derating is required above 25 °C at 2.4 mW/°C based on 415 K/W thermal resistance, limiting usable power to ~180 mW at 100 °C ambient.
How does the C-series differ from the B-series in the BZX38450 family?
The C-series features an intentionally elevated reverse leakage current profile optimized for faster switching transients and reduced noise in feedback loops, as documented in Application Note AN90031. This contrasts with the B-series' ultra-low-leakage design, making C-series preferable in dynamic regulation and low-noise analog applications.
Can BZX38450-C3V6X be used in forward conduction mode?
Yes-it exhibits a maximum forward voltage of 0.9 V at 10 mA, allowing use as a low-drop rectifier or polarity protection diode. However, its primary design intent and characterization are for reverse-biased Zener operation; forward characteristics are secondary and not guaranteed beyond the stated limit.
What is the marking code for BZX38450-C3V6X on the SOD323 package?
The official marking code is "6Y", printed on the top surface of the device. The cathode is indicated by a bar adjacent to pin 1, consistent with standard SOD323 orientation and Nexperia's marking table in section 7 of the datasheet.
BZX38450-C3V6X 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):
- 3.6 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 7.5 µA @ 2 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-C3V6X FAQ
1.How can I place an order for BZX38450-C3V6X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-C3V6X 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-C3V6X reliable?
The price and inventory of BZX38450-C3V6X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX38450-C3V6X is usually 5 days.
3.What payment methods are accepted for BZX38450-C3V6X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-C3V6X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-C3V6X?
BZX38450-C3V6X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-C3V6X 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-C3V6X?
For technical support, including BZX38450-C3V6X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-C3V6X requirements.
6.How does Aetrix verify that BZX38450-C3V6X is sourced from the original manufacturer or authorized distributors?
All BZX38450-C3V6X 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-C3V6X meets industry standards.
7.What is the process for return or replacement of BZX38450-C3V6X?
All BZX38450-C3V6X units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-C3V6X, 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-C3V6X part is unused and in its original packaging.
Return procedure for BZX38450-C3V6X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-C3V6X 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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