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NXP Semiconductors BZX284-C3V9,115
- Part No.:
- BZX284-C3V9,115
- Manufacturer:
- NXP Semiconductors
- Category:
- Single Zener Diodes
- Package:
- SOD-110
- Datasheet:
-
BZX284-C3V9,115.pdf
- Description:
- DIODE ZENER 3.9V 400MW SOD110
- Quantity:
- Payment:
- Shipping:
Inventory:6,373
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Product details
Overview
BZX284-C3V9,115 from NXP Semiconductors is a ±5% tolerance Zener voltage regulator diode in a SOD110 ceramic SMD package, rated for 3.9 V nominal working voltage at 5 mA test current, 400 mW total power dissipation, and 3 μA reverse leakage at 1 V reverse bias. It serves as a low-power precision reference or clamp in power supply feedback paths, sensor biasing circuits, and overvoltage protection stages.
For engineers reviewing the BZX284-C3V9,115 datasheet, BZX284-C3V9,115 pinout, BZX284-C3V9,115 application, or BZX284-C3V9,115 equivalent, this page delivers verified electrical parameters, thermal resistance (315 K/W), differential resistance (400–500 Ω), temperature coefficient (−2.5 mV/K), and SOD110 package dimensions - all critical for stability analysis, PCB layout, and replacement validation in space-constrained industrial designs.
Technical Context
The BZX284-C3V9,115 operates as a two-terminal silicon Zener diode optimized for stable voltage regulation under reverse-biased conditions. Its design targets low-current reference applications with defined test current (5 mA), specified differential resistance (400–500 Ω), and negative temperature coefficient (−2.5 mV/K) to enable predictable drift compensation in analog signal chains.
It is constructed in a very small ceramic SMD package (SOD110) with 1.90–2.10 mm length, 1.10–1.40 mm width, and 1.6 mm max height, and features a cathode identifier mark on the top surface. Thermal resistance from junction to ambient is 315 K/W when mounted on a standard 11 × 25 × 1.6 mm PCB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage (VZ) | 3.9 V at IZ = 5 mA - defines stable regulation point for low-power reference circuits |
| Tolerance | ±5% - specifies maximum deviation from nominal voltage under production conditions |
| Total Power Dissipation (Ptot) | 400 mW at Tamb = 25 °C - sets maximum continuous reverse power handling before thermal derating |
| Reverse Leakage Current (IR) | 3 μA at VR = 1 V - indicates low standby current in clamping or biasing roles |
| Differential Resistance (rdif) | 400–500 Ω at IZ = 5 mA - quantifies voltage regulation stiffness against load current variation |
| Temperature Coefficient (SZ) | −2.5 mV/K at IZ = 5 mA - enables prediction of voltage drift across operating temperature range |
| Junction-to-Ambient Thermal Resistance (Rth j-a) | 315 K/W - determines required PCB copper area and airflow for safe thermal operation |
Pinout & Package
SOD110 is a very small ceramic rectangular surface-mounted package with two terminals: anode (pin 1) and cathode (pin 2), identified by a cathode mark on the top surface. Dimensions: 1.90–2.10 mm (L) × 1.10–1.40 mm (W) × max 1.6 mm (H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward current entry / reverse bias return path | Connected to lower potential node in Zener regulation configuration; carries forward current up to 250 mA |
| Cathode (Pin 2) | Zener voltage reference node / reverse bias input | Connected to regulated output node; defines 3.9 V reference relative to anode under reverse bias |
Key Features
| Feature | Design Value |
|---|---|
| Low-power Zener regulation | 400 mW Ptot enables use in battery-powered and thermally constrained PCBs without heatsinking |
| ±5% voltage tolerance | Supports cost-sensitive applications where tighter tolerance is unnecessary, reducing BOM cost vs. ±2% B-series |
| SOD110 ceramic SMD package | Enables high-density placement and automated reflow assembly; superior moisture resistance vs. plastic packages |
| Negative temperature coefficient | −2.5 mV/K allows predictable compensation when paired with positive-TC components in reference networks |
| Low reverse leakage | 3 μA at 1 V reverse bias minimizes quiescent current draw in always-on protection or bias circuits |
Applications
| Power Supply Feedback Reference | Sensor Biasing Network |
|---|---|
|
Use Scenario: Providing stable 3.9 V reference for optocoupler-based feedback in isolated DC-DC converters. IC Role / Device Role / Timing Role: Zener voltage reference node defining regulation threshold for error amplifier input. Use Value: Enables tight output voltage control (±5%) without external precision references, reducing component count and board area. |
Use Scenario: Biasing resistive temperature detectors (RTDs) or photodiodes in industrial sensor front-ends. IC Role / Device Role / Timing Role: Low-drift voltage clamp establishing fixed bias point for analog signal conditioning. Use Value: Maintains consistent sensor excitation voltage across −40 °C to +125 °C, minimizing measurement offset drift. |
| Overvoltage Clamp Protection | Microcontroller I/O Level Shifting |
|
Use Scenario: Protecting 3.3 V logic inputs from transient surges exceeding 5 V in automotive body electronics. IC Role / Device Role / Timing Role: Reverse-biased shunt element diverting excess energy to ground during ESD or load dump events. Use Value: Limits peak voltage to ≤4.1 V (3.9 V + dynamic impedance drop), preventing latch-up or gate oxide damage in downstream ICs. |
Use Scenario: Translating 5 V microcontroller GPIO signals to 3.3 V peripherals using passive level-shifting topology. IC Role / Device Role / Timing Role: Cathode-referenced clamp limiting high-side voltage swing to 3.9 V while preserving signal edge integrity. Use Value: Eliminates need for active translators or MOSFETs, supporting >1 MHz digital signaling with minimal propagation delay. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5226BS-7-F | 3.9 V ±5%, SOD-123 package, 350 mW Ptot, 500 Ω rdif, 5 μA IR at 1 V | Higher differential resistance and leakage; slightly lower power rating | Acceptable for non-critical biasing where tighter thermal performance is not required |
| Vishay BZX384-C3V9 | 3.9 V ±5%, SOD-323 package, 300 mW Ptot, 450 Ω rdif, 3 μA IR at 1 V | Smaller footprint but lower power rating; identical leakage and similar rdif | Preferred for ultra-dense layouts where 400 mW margin is not needed |
Compared with BZX284-C3V9,115, the MMBZ5226BS-7-F offers lower power handling and higher leakage, making it less suitable for precision references, while the BZX384-C3V9 trades 100 mW derating for 30% smaller area - ideal when board space outweighs thermal headroom.
Availability
BZX284-C3V9,115 is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, and consumer power adapter feedback loops requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for BZX284-C3V9,115 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 for general-purpose, low-power voltage regulation in space-constrained SMD applications - emphasizing reliability, tight voltage tolerance options, and robust ceramic packaging for harsh environments.
FAQ
What is the nominal Zener voltage and test current for BZX284-C3V9,115?
The BZX284-C3V9,115 has a nominal Zener voltage of 3.9 V measured at a test current of 5 mA. This value falls within the 3.82 V to 3.98 V range specified for ±5% tolerance. The device is characterized under these conditions per NXP's 2002 product data sheet, and the 5 mA test current reflects its intended operating point for stable regulation performance in low-power applications.
What package type does BZX284-C3V9,115 use, and what are its key mechanical dimensions?
The BZX284-C3V9,115 uses the SOD110 very small ceramic SMD package. Its dimensions are 1.90–2.10 mm in length, 1.10–1.40 mm in width, and a maximum height of 1.6 mm. The cathode is marked on the top surface, and the package is designed for reflow soldering on standard PCBs with no lead-free compatibility restrictions noted in the original datasheet.
What is the maximum reverse leakage current for BZX284-C3V9,115, and at what condition is it specified?
The BZX284-C3V9,115 exhibits a maximum reverse leakage current of 3 μA at a reverse voltage of 1 V and Tj = 25 °C. This parameter is explicitly listed in Table 1 of the NXP datasheet for the BZX284-C3V9 variant and reflects the diode's ability to maintain low standby current in clamping or biasing configurations.
How does the temperature coefficient of BZX284-C3V9,115 affect its regulation accuracy over temperature?
The BZX284-C3V9,115 has a temperature coefficient of −2.5 mV/K at IZ = 5 mA, meaning its Zener voltage decreases by approximately 2.5 mV per Kelvin rise in junction temperature. This predictable negative drift allows designers to compensate for thermal effects in precision references - for example, by pairing with positive-TC resistors or selecting operating points where drift cancels across a network.
Is BZX284-C3V9,115 suitable for use in automotive applications, and what thermal limitations apply?
The BZX284-C3V9,115 is rated for junction temperatures up to 150 °C and storage temperatures from −65 °C to +150 °C, meeting baseline requirements for under-hood automotive use. However, its 315 K/W junction-to-ambient thermal resistance requires careful PCB layout - such as ≥1 cm² of 2-oz copper pour - to maintain safe operation at full 400 mW dissipation in high-ambient environments. NXP's datasheet does not specify AEC-Q200 qualification, so system-level validation is required.
BZX284-C3V9,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- SOD-110
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 3.9 V
- Tolerance:
- ±5%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 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-C3V9,115 FAQ
1.How can I place an order for BZX284-C3V9,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX284-C3V9,115 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-C3V9,115 reliable?
The price and inventory of BZX284-C3V9,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX284-C3V9,115 is usually 5 days.
3.What payment methods are accepted for BZX284-C3V9,115?
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4.How is shipping managed for BZX284-C3V9,115?
BZX284-C3V9,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX284-C3V9,115 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-C3V9,115?
For technical support, including BZX284-C3V9,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX284-C3V9,115 requirements.
6.How does Aetrix verify that BZX284-C3V9,115 is sourced from the original manufacturer or authorized distributors?
All BZX284-C3V9,115 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-C3V9,115 meets industry standards.
7.What is the process for return or replacement of BZX284-C3V9,115?
All BZX284-C3V9,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX284-C3V9,115, 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-C3V9,115 part is unused and in its original packaging.
Return procedure for BZX284-C3V9,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX284-C3V9,115 Tags
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