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Nexperia USA Inc. BZX38450-C3V0F
- Part No.:
- BZX38450-C3V0F
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-C3V0F.pdf
- Description:
- DIODE ZENER 3V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:8,843
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Product details
Overview
BZX38450-C3V0F 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 3.0 V regulation at 50 µA test current, with ±2 % tolerance, 170 pF capacitance at 0 V, and 0.8 µA max reverse leakage at VR = 3.0 V - ideal for battery-powered sensor nodes and portable MCU power-rail stabilization.
For engineers reviewing the BZX38450-C3V0F datasheet, BZX38450-C3V0F pinout, BZX38450-C3V0F application, or BZX38450-C3V0F equivalent, key selection criteria include its 50 µA regulation point, tight ±2 % tolerance, low 170 pF junction capacitance, and thermal resistance of 415 K/W - critical for stable reference performance in space-constrained, thermally isolated designs.
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining a stable 3.0 V output across load variations by conducting reverse current above its breakdown threshold. Its differential resistance is ≤600 Ω at IZ = 50 µA and ≤100 Ω at IZ = 1 mA, enabling predictable regulation under light-load conditions.
The diode features an intentionally optimized leakage profile per AN90031 for fast switching and noise reduction, with a temperature coefficient of −3.5 mV/K and junction-to-ambient thermal resistance of 415 K/W on FR4 PCB - supporting reliable operation from −55 °C to +150 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 3.0 V at IZ = 50 µA - defines precise reference point for low-bias analog circuitry |
| Tolerance | ±2 % - ensures tight voltage accuracy without post-production trimming |
| Reverse Leakage Current | ≤0.8 µA at VR = 3.0 V - minimizes quiescent power loss in always-on battery systems |
| Junction Capacitance | 170 pF at VR = 0 V, f = 1 MHz - limits high-frequency coupling in signal-path references |
| Power Dissipation | 300 mW at Tamb ≤ 25 °C - supports continuous operation in compact SOD323 footprint |
| Differential Resistance | ≤600 Ω at IZ = 50 µA - maintains regulation stability under microamp-level load shifts |
| Forward Voltage | ≤0.9 V at IF = 10 mA - enables use as low-drop rectifier or ESD clamp in dual-role layouts |
Pinout & Package
Package: SOD323 (SC-76), surface-mounted plastic package; 2 leads; 1.3 mm pitch; 1.7 mm × 1.25 mm × 0.95 mm body. Cathode identified by marking bar.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated voltage rail; reverse-biased terminal where Zener breakdown occurs |
| 2 | Anode (A) | Connected to ground or lower-potential node; completes shunt regulation path |
Key Features
| Feature | Design Value |
|---|---|
| Low test current regulation | Specified at 50 µA - enables stable reference generation in µA-level standby modes |
| Optimized leakage profile | Intentional minor rise per AN90031 - reduces switching noise and improves transient response |
| Tight voltage tolerance | ±2 % - eliminates need for external calibration in precision sensor front-ends |
| Miniature SMD package | SOD323 footprint - fits high-density PCBs with 1.3 mm lead pitch and <1 mm height |
| Wide operating temperature | −55 °C to +150 °C junction range - supports industrial and automotive under-hood applications |
Applications
| Portable Sensor Biasing | MCU Reset Reference |
|---|---|
|
Use Scenario: Providing stable 3.0 V bias to MEMS accelerometers and analog temperature sensors in wearables. IC Role / Device Role / Timing Role: Shunt voltage reference establishing accurate ADC input scaling and sensor excitation voltage. Use Value: 0.8 µA leakage and ±2 % tolerance ensure sub-0.1 % measurement drift over battery discharge cycles. |
Use Scenario: Generating clean reset threshold for ultra-low-power microcontrollers during brown-out detection. IC Role / Device Role / Timing Role: Precision Zener element in RC-based reset generator circuit. Use Value: 170 pF capacitance prevents high-frequency noise from corrupting reset timing edges. |
| IoT Node Power-Rail Clamp | Low-Power Op-Amp Reference |
|
Use Scenario: Clamping 3.3 V supply rail against transients in NB-IoT modems powered by coin cells. IC Role / Device Role / Timing Role: Low-leakage shunt regulator absorbing surge energy while limiting rail excursion. Use Value: 300 mW power rating and 415 K/W thermal resistance allow safe dissipation of 100 µs surges up to 40 W. |
Use Scenario: Supplying reference voltage to rail-to-rail op-amps in battery-operated medical patch monitors. IC Role / Device Role / Timing Role: Stable DC reference source for instrumentation amplifier gain-setting networks. Use Value: −3.5 mV/K temperature coefficient minimizes offset drift across 0–50 °C clinical operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ4684T1G | 3.0 V, ±5 % tolerance, 500 mW Ptot, SOD-123 package | Higher power rating but looser tolerance and larger footprint | Prefer when higher surge immunity is required and ±5 % accuracy is acceptable |
| BZX84-C3V0 | 3.0 V, ±5 % tolerance, 300 mW Ptot, SOT-23 package | Larger SOT-23 body, higher thermal resistance (500 K/W), no AN90031 leakage optimization | Choose only if SOT-23 assembly infrastructure exists and noise sensitivity is low |
Compared with BZX38450-C3V0F, MMSZ4684T1G offers greater surge handling but sacrifices accuracy and board area efficiency, while BZX84-C3V0 trades miniaturization and low-noise design for legacy package compatibility - making the BZX38450-C3V0F optimal for next-gen space- and power-constrained reference designs.
Availability
BZX38450-C3V0F is available at Aetrix Electronics and suitable for portable sensor biasing, MCU reset reference generation, and IoT node power-rail clamping requiring stable component supply across high-mix, low-volume production runs.
Supply support for BZX38450-C3V0F 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 ultra-low-power voltage reference and biasing in battery-operated and space-constrained electronics.
FAQ
What is the maximum reverse current the BZX38450-C3V0F can sustain continuously?
The device is rated for continuous operation at up to 250 mA forward current, but as a Zener regulator, its reverse conduction is limited by power dissipation. At Tamb = 25 °C, sustained reverse current must be kept below ~100 mA to stay within the 300 mW total power limit - actual safe current depends on PCB thermal design and ambient temperature.
Does the BZX38450-C3V0F support bidirectional ESD protection?
No - it is a unidirectional Zener diode optimized for reverse-bias regulation. While it conducts in forward bias (VF ≤ 0.9 V at 10 mA), its forward characteristics are not specified for ESD clamping. For bidirectional protection, a dedicated TVS array or back-to-back Zener pair is required.
How does the "C" suffix in BZX38450-C3V0F affect its electrical behavior?
The "C" denotes the tighter ±2 % tolerance grade (vs. "B" = ±5 %), and indicates intentional minor leakage current optimization per AN90031 for improved switching speed and reduced noise - confirmed in Table 8 where C-series devices show lower IR and optimized rdiff vs. B-series at same VZ.
Can BZX38450-C3V0F be used in place of a 3.3 V Zener in a linear regulator feedback network?
No - its nominal regulation voltage is 3.0 V, not 3.3 V. Substituting it would shift the regulated output downward by ~0.3 V, potentially violating downstream IC voltage requirements. For 3.3 V reference, use BZX38450-C3V3 (3.3 V, ±2 %) instead.
BZX38450-C3V0F 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):
- 3 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 800 nA @ 1 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-C3V0F FAQ
1.How can I place an order for BZX38450-C3V0F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-C3V0F 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-C3V0F reliable?
The price and inventory of BZX38450-C3V0F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX38450-C3V0F is usually 5 days.
3.What payment methods are accepted for BZX38450-C3V0F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-C3V0F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-C3V0F?
BZX38450-C3V0F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-C3V0F 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-C3V0F?
For technical support, including BZX38450-C3V0F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-C3V0F requirements.
6.How does Aetrix verify that BZX38450-C3V0F is sourced from the original manufacturer or authorized distributors?
All BZX38450-C3V0F 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-C3V0F meets industry standards.
7.What is the process for return or replacement of BZX38450-C3V0F?
All BZX38450-C3V0F units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-C3V0F, 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-C3V0F part is unused and in its original packaging.
Return procedure for BZX38450-C3V0F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-C3V0F 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
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
-
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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