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NXP Semiconductors BZX284-B12,115
- Part No.:
- BZX284-B12,115
- Manufacturer:
- NXP Semiconductors
- Category:
- Single Zener Diodes
- Package:
- SOD-110
- Datasheet:
-
BZX284-B12,115.pdf
- Description:
- DIODE ZENER 12V 400MW SOD110
- Quantity:
- Payment:
- Shipping:
Inventory:5,304
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Product details
Overview
BZX284-B12,115 from NXP Semiconductors is a ±2% tolerance, 12 V Zener voltage regulator diode in a SOD110 ceramic SMD package, rated for 400 mW total power dissipation at 25 °C ambient, with 25 Ω typical differential resistance at 5 mA test current and 100 nA reverse leakage at 8 V reverse bias - used for precision low-power voltage reference and overvoltage clamping in sensor signal conditioning circuits.
For engineers reviewing the BZX284-B12,115 datasheet, BZX284-B12,115 pinout, BZX284-B12,115 application, or BZX284-B12,115 equivalent, key selection considerations include its ±2% Zener voltage tolerance, 25 Ω dynamic impedance at 5 mA, 100 nA IR at VR = 8 V, SOD110 footprint compatibility, and thermal resistance of 315 K/W when mounted on a standard PCB.
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining stable output voltage across load variations by conducting reverse current above its nominal Zener breakdown voltage of 11.8–12.2 V. Its low 25 Ω differential resistance ensures minimal voltage deviation under changing current conditions.
The BZX284-B12,115 exhibits a positive temperature coefficient of +8.4 mV/K at 5 mA, enabling predictable drift compensation in temperature-sensitive references. It is characterized at Tj = 25 °C, with junction temperature limited to 150 °C and storage range spanning −65 to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11.8–12.2 V at IZ = 5 mA - defines precise regulation point for low-current reference applications |
| Tolerance | ±2% - enables tighter system-level voltage accuracy vs. ±5% variants like BZX284-C12 |
| Differential Resistance (rdiff) | 25 Ω max at IZ = 5 mA - determines output voltage stability under load current variation |
| Reverse Leakage Current (IR) | 100 nA at VR = 8 V - ensures minimal quiescent power loss in standby or high-impedance bias networks |
| Total Power Dissipation (Ptot) | 400 mW at Tamb = 25 °C - sets maximum continuous DC power handling in standard PCB mounting |
| Thermal Resistance (Rth j-a) | 315 K/W - defines junction-to-ambient temperature rise per watt, critical for thermal design margining |
| Junction Temperature (Tj) | 150 °C max - constrains maximum allowable operating temperature under power stress |
Pinout & Package
Package: SOD110 - very small ceramic surface-mount package (2.10 × 1.40 × 1.60 mm), cathode marked with band on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (1) | Forward conduction terminal / low-side connection | Connected to circuit ground or lower potential node during Zener operation |
| Cathode (2) | Zener breakdown terminal / regulated output node | Provides stable 12 V reference when reverse-biased; marked with cathode band |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables tighter system-level voltage accuracy without post-calibration in precision analog front-ends |
| Low 25 Ω dynamic impedance | Minimizes output voltage shift under ±1 mA load current changes, improving regulation stability |
| SOD110 ceramic package | Offers superior moisture resistance and long-term parameter stability vs. plastic SMD packages |
| +8.4 mV/K temperature coefficient | Allows predictable thermal drift modeling for compensated reference designs across −40 to +85 °C |
| 400 mW power rating | Supports robust transient clamping in 3.3 V/5 V/12 V rail protection without derating at room temperature |
Applications
| Industrial Sensor Signal Conditioning | Microcontroller Reset Circuit Reference |
|---|---|
|
Use Scenario: Stabilizing excitation voltage for bridge-based pressure sensors in PLC analog input modules. IC Role / Device Role / Timing Role: Shunt voltage reference providing 12 V bias to Wheatstone bridge, rejecting supply ripple. Use Value: ±2% tolerance and 25 Ω rdiff ensure <±12 mV output variation across 0.5–5 mA bridge current range. |
Use Scenario: Generating accurate reset threshold for 3.3 V microcontrollers during brown-out detection. IC Role / Device Role / Timing Role: Zener-clamped voltage divider feeding comparator input for reliable power-on reset assertion. Use Value: 100 nA reverse leakage prevents significant divider current error, preserving threshold accuracy. |
| Low-Power IoT Node Voltage Clamp | Automotive Body Control Module ESD Protection |
|
Use Scenario: Clamping transient overvoltage on 12 V battery-supplied wireless sensor nodes. IC Role / Device Role / Timing Role: Standby-mode shunt protector absorbing short-duration surges without latch-up. Use Value: 400 mW rating and 12 V VZ allow safe clamping of ISO 7637-2 pulse 1/2a transients up to 100 μs duration. |
Use Scenario: Secondary overvoltage clamp on LIN bus transceiver supply rails in automotive door modules. IC Role / Device Role / Timing Role: Low-leakage backup regulator limiting rail voltage during load-dump events. Use Value: Ceramic SOD110 package withstands automotive thermal cycling; 150 °C Tj supports under-hood placement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage regulator diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX284-C12,115 | ±5% tolerance (11.4–12.7 V), otherwise identical electrical specs and SOD110 package | Acceptable where system-level calibration compensates for wider voltage spread | Select for cost-sensitive designs where ±5% regulation accuracy suffices |
| MMBZ5242B,115 | ±5% tolerance, 12 V nominal, 500 mW rating, SOT-23 package, higher 30 Ω rdiff | Higher power handling but larger footprint and less stable regulation due to plastic package | Choose when higher surge energy absorption is required and board space allows SOT-23 |
Compared with BZX284-C12,115 and MMBZ5242B,115, the BZX284-B12,115 delivers tighter voltage accuracy and superior long-term stability via its ceramic SOD110 package - critical for uncalibrated industrial sensors and automotive body electronics where drift must remain below 0.1%/°C.
Availability
BZX284-B12,115 is available at Aetrix Electronics and suitable for industrial sensor interfaces, microcontroller reset circuits, and low-power IoT voltage clamping requiring stable component supply and guaranteed traceability.
Supply support for BZX284-B12,115 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 markets.
The BZX284 series was designed for precision, low-power voltage regulation in space-constrained SMD applications - emphasizing stability, tight tolerance, and ceramic-package reliability for harsh-environment electronics.
FAQ
What is the nominal Zener voltage and tolerance of the BZX284-B12,115?
The BZX284-B12,115 has a nominal Zener voltage of 12 V with a ±2% tolerance, meaning its actual breakdown voltage falls between 11.8 V and 12.2 V when tested at 5 mA reverse current. This tight tolerance makes the BZX284-B12,115 suitable for applications demanding higher reference accuracy than standard ±5% Zener diodes.
What is the maximum power dissipation rating for the BZX284-B12,115?
The BZX284-B12,115 is rated for a maximum total power dissipation of 400 mW at an ambient temperature of 25 °C, assuming standard PCB mounting (11 × 25 × 1.6 mm). Derating is required above 25 °C ambient, following the 315 K/W thermal resistance specification - for example, power must be reduced to ~200 mW at 75 °C ambient.
Does the BZX284-B12,115 have a specified reverse leakage current, and at what condition?
Yes, the BZX284-B12,115 specifies a maximum reverse leakage current (IR) of 100 nA at a reverse voltage (VR) of 8 V and Tj = 25 °C. This ultra-low leakage supports high-impedance bias networks and precision voltage dividers where current error must remain below 100 nA.
What package type does the BZX284-B12,115 use, and what are its key mechanical features?
The BZX284-B12,115 uses the SOD110 package - a very small ceramic surface-mount outline measuring 2.10 × 1.40 × 1.60 mm. Its ceramic construction provides enhanced moisture resistance, thermal stability, and long-term parametric consistency compared to plastic alternatives, making it ideal for automotive and industrial environments.
How does the temperature coefficient of the BZX284-B12,115 affect its performance in varying thermal conditions?
The BZX284-B12,115 has a typical temperature coefficient of +8.4 mV/K at 5 mA test current, indicating its Zener voltage increases predictably with junction temperature. This positive drift allows designers to compensate for thermal effects in reference circuits - for instance, pairing it with a negative-coefficient component to achieve near-zero net drift over −40 to +85 °C.
BZX284-B12,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- SOD-110
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 12 V
- Tolerance:
- ±2%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 10 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 8 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-B12,115 FAQ
1.How can I place an order for BZX284-B12,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX284-B12,115 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-B12,115 reliable?
The price and inventory of BZX284-B12,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX284-B12,115 is usually 5 days.
3.What payment methods are accepted for BZX284-B12,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX284-B12,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX284-B12,115?
BZX284-B12,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX284-B12,115 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-B12,115?
For technical support, including BZX284-B12,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX284-B12,115 requirements.
6.How does Aetrix verify that BZX284-B12,115 is sourced from the original manufacturer or authorized distributors?
All BZX284-B12,115 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-B12,115 meets industry standards.
7.What is the process for return or replacement of BZX284-B12,115?
All BZX284-B12,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX284-B12,115, 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-B12,115 part is unused and in its original packaging.
Return procedure for BZX284-B12,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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