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NXP Semiconductors BZX284-C33,115
- Part No.:
- BZX284-C33,115
- Manufacturer:
- NXP Semiconductors
- Category:
- Single Zener Diodes
- Package:
- SOD-110
- Datasheet:
-
BZX284-C33,115.pdf
- Description:
- DIODE ZENER 33V 400MW SOD110
- Quantity:
- Payment:
- Shipping:
Inventory:7,593
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Product details
Overview
BZX284-C33,115 from NXP Semiconductors is a ±5% tolerance Zener voltage regulator diode in a SOD110 ceramic SMD package, rated for 33 V nominal working voltage at IZtest = 2 mA, 400 mW total power dissipation, and 30 Ω typical differential resistance at test current. It serves as a precision low-power voltage reference in power supply feedback paths, overvoltage clamping circuits, and analog signal conditioning stages.
For engineers reviewing the BZX284-C33,115 datasheet, BZX284-C33,115 pinout, BZX284-C33,115 application, or BZX284-C33,115 equivalent, key selection criteria include its ±5% voltage tolerance, 30 Ω dynamic impedance at 2 mA, −11 mV/K temperature coefficient, 60 pF junction capacitance at 0 V, and suitability for space-constrained SMD designs requiring stable regulation below 400 mW.
Technical Context
This device operates as a reverse-biased Zener diode with a nominal breakdown voltage of 33 V, specified under IZtest = 2 mA and Tj = 25 °C. Its differential resistance of 30 Ω (typ) and temperature coefficient of −11 mV/K (typ) are measured at that same test condition, enabling predictable regulation behavior across ambient temperatures from −65 °C to +150 °C.
The SOD110 package provides mechanical robustness and thermal performance with Rth j-a = 315 K/W when mounted on a 11 × 25 × 1.6 mm PCB. Its 60 pF junction capacitance at f = 1 MHz and VR = 0 V supports stable operation in low-frequency regulation and clamping applications without high-frequency instability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 33 V at IZtest = 2 mA - defines primary regulation point for feedback and reference circuits |
| Voltage Tolerance | ±5% - specifies allowable deviation (31.0–35.0 V) for design margining and binning |
| Differential Resistance | 30 Ω (typ), 275 Ω (max) - determines output impedance and load regulation sensitivity |
| Temperature Coefficient | −11 mV/K (typ) - quantifies voltage drift per degree Celsius, critical for thermal stability |
| Junction Capacitance | 60 pF at f = 1 MHz, VR = 0 V - impacts high-frequency noise coupling and transient response |
| Total Power Dissipation | 400 mW at Tamb = 25 °C - sets maximum continuous DC power handling before thermal derating |
| Reverse Current | 50 nA at VR = 0.7 × VZnom - defines leakage level affecting standby power and accuracy |
Pinout & Package
SOD110 is a very small ceramic rectangular surface-mounted package with cathode identification mark on top surface. Dimensions: 2.10 × 1.40 × 1.60 mm (L × W × H), with 0.1 mm maximum package height tolerance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (1) | Forward conduction terminal / low-side connection | Connected to ground or lower potential node in Zener regulation configuration |
| Cathode (2) | Zener breakdown terminal / high-side connection | Connected to input or regulated node; polarity mark identifies this terminal on PCB layout |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SOD110 ceramic package | Enables placement in ultra-compact PCB layouts with minimal board area and thermal mass |
| ±5% voltage tolerance (BZX284-C series) | Provides cost-optimized regulation accuracy suitable for non-critical reference and clamping |
| 400 mW power rating at 25 °C ambient | Supports stable DC regulation in low-to-medium current applications without forced cooling |
| 30 Ω typical dynamic impedance at 2 mA | Ensures tight voltage regulation under varying load conditions in feedback networks |
| −11 mV/K temperature coefficient | Delivers predictable, negative drift behavior for compensation-aware circuit design |
Applications
| Switch-Mode Power Supply Feedback | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Provides precise 33 V reference for optocoupler-based feedback loop in isolated AC/DC converters. IC Role / Device Role / Timing Role: Zener voltage reference establishing error amplifier threshold in secondary-side regulation. Use Value: Maintains ±5% output voltage accuracy across line/load variations due to stable 33 V breakdown and low dynamic impedance. |
Use Scenario: Generates clean reset signal for 3.3 V or 5 V microcontrollers during power-up and brownout events. IC Role / Device Role / Timing Role: Clamping diode limiting voltage on reset pin to safe levels while enabling accurate threshold detection. Use Value: Prevents latch-up and false resets using 33 V breakdown with <50 nA leakage at sub-threshold voltages. |
| Industrial Sensor Signal Conditioning | ESD Protection Clamp |
Use Scenario: Stabilizes bias voltage for analog front-end amplifiers in 4–20 mA transmitter modules. IC Role / Device Role / Timing Role: Low-drift voltage reference supplying excitation to precision resistive sensors. Use Value: Delivers thermally stable 33 V reference with −11 mV/K coefficient, minimizing sensor offset drift over temperature. |
Use Scenario: Protects I/O lines in industrial PLC modules against transient surges up to 12 V. IC Role / Device Role / Timing Role: Fast-acting shunt clamp diverting ESD energy away from sensitive interface ICs. Use Value: Responds within nanoseconds with 60 pF capacitance and 400 mW surge capability per IEC 61000-4-2 Level 4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage regulator diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5262B-7-F | 33 V nominal, ±5%, 200 mW rating, SOT-23 package, 70 Ω max rdiff | Lower power rating and higher dynamic impedance limit use in higher-current regulation | Select when footprint compatibility with SOT-23 is required and power demand stays below 200 mW |
| BZX84-C33 | 33 V nominal, ±5%, 300 mW rating, SOT-23 package, 35 Ω typ rdiff, −11 mV/K SZ | Same voltage and tempco but lower power and different package thermal profile | Choose for legacy SOT-23 assembly lines where SOD110 rework is impractical |
Compared with BZX284-C33,115, MMBZ5262B-7-F offers smaller footprint but reduced power handling and higher impedance, while BZX84-C33 matches voltage and tempco closely but trades 100 mW lower dissipation and less favorable thermal resistance for SOT-23 manufacturability.
Availability
BZX284-C33,115 is available at Aetrix Electronics and suitable for industrial sensor interfaces, PLC I/O protection, and isolated SMPS feedback circuits requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZX284-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
NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.
The BZX284 series was designed as a family of low-power, high-stability Zener diodes for precision voltage reference and clamping in space-constrained SMD systems, emphasizing ceramic package reliability and tight parametric control across voltage grades.
FAQ
What is the nominal Zener voltage and test condition for BZX284-C33,115?
The BZX284-C33,115 has a nominal Zener voltage of 33 V, specified at a test current of 2 mA and junction temperature of 25 °C. This value falls within the guaranteed range of 31.0 V to 35.0 V due to its ±5% tolerance. The 2 mA test condition aligns with standard Zener characterization practices for mid-voltage devices in the BZX284-C series, ensuring repeatable measurement across production lots.
What package type and dimensions does BZX284-C33,115 use?
BZX284-C33,115 uses the SOD110 very small ceramic SMD package with dimensions of 2.10 mm × 1.40 mm × 1.60 mm (L × W × H). It features a cathode identifier mark on the top surface and is optimized for high-reliability, low-profile mounting on printed-circuit boards. The package supports thermal resistance of 315 K/W when mounted on a standard 11 × 25 × 1.6 mm test board.
How does the temperature coefficient of BZX284-C33,115 affect circuit performance?
The BZX284-C33,115 exhibits a typical temperature coefficient of −11 mV/K at IZtest = 2 mA, meaning its Zener voltage decreases by approximately 11 mV per degree Celsius rise in junction temperature. This negative drift must be accounted for in precision reference designs; however, it enables predictable compensation when paired with positive-drift components in bandgap-like configurations.
What is the maximum reverse leakage current for BZX284-C33,115 at rated voltage?
At VR = 0.7 × VZnom = 23.1 V, the BZX284-C33,115 guarantees a maximum reverse leakage current of 50 nA. This low leakage supports high-impedance node stabilization and minimizes standby power loss in battery-operated or energy-sensitive applications where even nanoamp-level currents impact system efficiency.
Can BZX284-C33,115 be used in place of higher-power Zener diodes?
No - BZX284-C33,115 is rated for 400 mW total power dissipation at 25 °C ambient and requires thermal derating above that temperature. Substituting it for higher-power Zeners (e.g., DO-41 or SOD-123 devices rated >500 mW) risks thermal runaway or premature failure under identical load conditions. Always verify power dissipation using P = VZ × IZ and compare against the BZX284-C33,115's derated curve.
BZX284-C33,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- SOD-110
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 33 V
- Tolerance:
- ±5%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 40 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-110
BZX284-C33,115 FAQ
1.How can I place an order for BZX284-C33,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX284-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 BZX284-C33,115 reliable?
The price and inventory of BZX284-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 BZX284-C33,115 is usually 5 days.
3.What payment methods are accepted for BZX284-C33,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX284-C33,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX284-C33,115?
BZX284-C33,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX284-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 BZX284-C33,115?
For technical support, including BZX284-C33,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX284-C33,115 requirements.
6.How does Aetrix verify that BZX284-C33,115 is sourced from the original manufacturer or authorized distributors?
All BZX284-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 BZX284-C33,115 meets industry standards.
7.What is the process for return or replacement of BZX284-C33,115?
All BZX284-C33,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX284-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 BZX284-C33,115 part is unused and in its original packaging.
Return procedure for BZX284-C33,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX284-C33,115 Tags
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