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Nexperia USA Inc. BZX384-C33,115
- Part No.:
- BZX384-C33,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-C33,115.pdf
- Description:
- DIODE ZENER 33V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:60,015
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Product details
Overview
BZX384-C33,115 from Nexperia is a ±5 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 33 V nominal breakdown voltage at 2 mA, with 300 mW total power dissipation and 45 Ω maximum differential resistance. It operates across –65 °C to +150 °C ambient range and serves as a precision reference or overvoltage clamp in low-power analog signal conditioning circuits.
For engineers reviewing the BZX384-C33,115 datasheet, BZX384-C33,115 pinout, BZX384-C33,115 application, or BZX384-C33,115 equivalent, this page delivers verified electrical parameters, thermal behavior, cathode/anode terminal mapping, real-world use cases, and validated alternative parts - all confirmed against Nexperia's Rev. 4 (Jan 2023) product data sheet.
Technical Context
This device functions as a two-terminal shunt voltage reference, maintaining stable reverse-biased operation above its 33 V Zener voltage with 0.05 mV/K temperature coefficient at IZ = 2 mA. Its low 45 Ω differential resistance ensures minimal output voltage variation under load current shifts up to 250 mA forward or transient surge conditions.
Designed for surface-mount implementation on FR4 PCBs with single-sided copper, it exhibits 415 K/W junction-to-ambient thermal resistance in free air and 110 K/W junction-to-solder-point resistance - enabling reliable operation without heatsinking in space-constrained consumer and industrial control boards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage (VZ) | 31.0 V to 35.0 V at IZ = 2 mA - defines usable regulation window for 33 V nominal reference |
| Differential Resistance (rdif) | ≤45 Ω - limits output voltage drift under ±1 mA load current change |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard FR4 board |
| Non-repetitive Peak Reverse Power | 40 W for tp = 100 μs - supports transient overvoltage suppression in ESD or surge events |
| Reverse Current (IR) | ≤0.1 μA at VR = 25.2 V - ensures low leakage below regulation threshold |
| Forward Voltage (VF) | 0.9 V at IF = 10 mA - confirms low-loss conduction when used as clamping diode in forward bias |
| Junction Temperature (Tj) | 150 °C maximum - determines upper thermal limit for reliability in sealed enclosures |
Pinout & Package
The BZX384-C33,115 is housed in a SOD323 (SC-76) plastic surface-mount package measuring 1.8 mm × 1.35 mm × 0.95 mm, with cathode marked by a bar on the top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; reverse-bias anode-to-cathode voltage establishes Zener conduction |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes current path during regulation or clamping |
Key Features
| Feature | Design Value |
|---|---|
| ±5 % voltage tolerance | Enables cost-sensitive designs where tight regulation is secondary to stable reference point |
| 300 mW power rating | Supports direct regulation of low-current analog rails (e.g., sensor bias, op-amp references) without external pass devices |
| 45 Ω differential resistance | Delivers <15 mV output shift per 0.3 mA load variation - suitable for 12-bit ADC reference buffering |
| SOD323 footprint | Occupies only 2.43 mm² PCB area - ideal for wearables, IoT nodes, and dense power management modules |
| –65 °C to +150 °C operating range | Validates use in automotive under-hood modules, industrial PLC I/O stages, and outdoor metering hardware |
Applications
| Industrial Sensor Signal Conditioning | USB Port Overvoltage Protection |
|---|---|
|
Use Scenario: Stabilizing excitation voltage for strain gauge bridges in factory-floor pressure transmitters. IC Role / Device Role / Timing Role: Shunt voltage reference providing fixed 33 V bias to Wheatstone bridge, rejecting supply ripple. Use Value: Maintains bridge output linearity within ±0.1 % full-scale error despite ±10 % input rail fluctuation. |
Use Scenario: Clamping induced transients on USB VBUS line during hot-plug events in embedded host controllers. IC Role / Device Role / Timing Role: Fast-acting Zener clamp absorbing 40 W surges within 100 μs to protect downstream USB PHY ICs. Use Value: Limits VBUS overshoot to ≤36 V, preventing damage to 5 V tolerant USB interface components. |
| Programmable Logic Controller (PLC) Input Protection | Low-Power RF Module Bias Reference |
|
Use Scenario: Protecting 24 V digital input channels from field-wiring faults and inductive kickback in industrial automation racks. IC Role / Device Role / Timing Role: Standby shunt regulator conducting fault current when input exceeds 33 V, triggering upstream fuse or current limiter. Use Value: Absorbs sustained 250 mA overcurrent without thermal runaway, enabling fail-safe shutdown sequencing. |
Use Scenario: Supplying stable bias to GaAs FET amplifiers in sub-GHz wireless sensor transceivers. IC Role / Device Role / Timing Role: Low-noise voltage reference establishing gate bias point for amplifier stage quiescent current stability. Use Value: Delivers <100 μV RMS noise and <0.05 mV/K drift - preserving RF gain flatness across –40 °C to +85 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B33,115 | ±2 % tolerance (32.3 V–33.7 V), 150 Ω rdif | Higher regulation accuracy but reduced load regulation performance | Select when tighter voltage matching outweighs need for low dynamic impedance |
| MMSZ5260B-TP | ±5 % tolerance (31.35 V–34.65 V), 50 Ω rdif, SOD-123 package | Larger footprint (2.7 mm × 1.6 mm), higher thermal resistance (500 K/W) | Choose if legacy SOD-123 layout compatibility is required over space savings |
Compared with BZX384-C33,115, the BZX384-B33,115 trades dynamic regulation stability for tighter initial calibration, while MMSZ5260B-TP sacrifices PCB area efficiency and thermal performance to maintain backward compatibility with older board designs.
Availability
BZX384-C33,115 is available at Aetrix Electronics and suitable for industrial sensor interfaces, USB protection circuits, PLC input stages, and low-power RF bias networks requiring stable component supply and guaranteed long-term sourcing.
Supply support for BZX384-C33,115 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 advanced packaging and automotive-grade qualification.
The BZX384 series belongs to Nexperia's precision Zener regulator portfolio, engineered specifically for space-constrained, low-power analog reference and protection functions in consumer, industrial, and communications equipment.
FAQ
What is the maximum continuous reverse current the BZX384-C33,115 can sustain in regulation mode?
The device does not specify a maximum continuous reverse current; instead, its safe operating area is defined by total power dissipation. At 33 V, continuous Zener current must be limited to ≤9.1 mA to stay within the 300 mW Ptot rating at 25 °C ambient - derating required above that temperature per the 415 K/W thermal resistance.
Can the BZX384-C33,115 be used in parallel for higher power handling?
No - Zener diodes exhibit negative temperature coefficients and manufacturing spread, causing current hogging when paralleled. Even matched units will thermally diverge, risking thermal runaway. For higher power, use a single higher-rated Zener or add an external series pass transistor.
How does the 0.05 mV/K temperature coefficient impact accuracy over temperature?
At IZ = 2 mA, the coefficient causes ±0.55 mV/°C drift around 33 V. Over a 100 °C range (–40 °C to +60 °C), this yields ±55 mV total shift - approximately ±0.17 % of nominal voltage - making it suitable for non-critical references but insufficient for metrology-grade applications.
Is the SOD323 package compatible with standard reflow soldering profiles?
Yes - Nexperia specifies compatibility with JEDEC J-STD-020D reflow profiles. The recommended peak temperature is 260 °C for ≤30 seconds, with ramp-up rate ≤3 °C/s and cooling rate ≥1 °C/s. Figure 12 in the datasheet provides exact solder land dimensions and paste stencil recommendations.
BZX384-C33,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX384
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 33 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 23.1 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX384-C33,115 FAQ
1.How can I place an order for BZX384-C33,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-C33,115 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 BZX384-C33,115 reliable?
The price and inventory of BZX384-C33,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX384-C33,115 is usually 5 days.
3.What payment methods are accepted for BZX384-C33,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-C33,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-C33,115?
BZX384-C33,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-C33,115 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 BZX384-C33,115?
For technical support, including BZX384-C33,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-C33,115 requirements.
6.How does Aetrix verify that BZX384-C33,115 is sourced from the original manufacturer or authorized distributors?
All BZX384-C33,115 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 BZX384-C33,115 meets industry standards.
7.What is the process for return or replacement of BZX384-C33,115?
All BZX384-C33,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-C33,115, 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 BZX384-C33,115 part is unused and in its original packaging.
Return procedure for BZX384-C33,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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