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NXP Semiconductors BZX284-B43,115
- Part No.:
- BZX284-B43,115
- Manufacturer:
- NXP Semiconductors
- Category:
- Single Zener Diodes
- Package:
- SOD-110
- Datasheet:
-
BZX284-B43,115.pdf
- Description:
- DIODE ZENER 43V 400MW SOD110
- Quantity:
- Payment:
- Shipping:
Inventory:3,670
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Product details
Overview
BZX284-B43,115 from NXP Semiconductors is a ±2% tolerance Zener voltage regulator diode in a SOD110 ceramic SMD package, rated for 43 V nominal working voltage at 2 mA test current, 400 mW total power dissipation, and 315 K/W junction-to-ambient thermal resistance-designed for precision low-power voltage reference and regulation in space-constrained consumer and industrial PCBs.
For engineers reviewing the BZX284-B43,115 datasheet, BZX284-B43,115 pinout, BZX284-B43,115 application, or BZX284-B43,115 equivalent, this page delivers verified electrical characteristics (VZ = 42.1–43.9 V), differential resistance (45 Ω typ. at 2 mA), temperature coefficient (+30 mV/K typ.), reverse leakage (50 nA at 0.7×VZ), and SOD110 mechanical dimensions to support schematic validation, thermal design, and layout compatibility checks.
Technical Context
This device operates as a two-terminal silicon Zener diode with controlled reverse breakdown behavior. Its regulation function relies on avalanche-dominated breakdown above 6 V, confirmed by its positive temperature coefficient (+30 mV/K) and low dynamic impedance (45 Ω typical at IZ = 2 mA).
The SOD110 package enables surface-mount integration with minimal footprint (2.1 × 1.4 × 1.6 mm) and defined thermal path to PCB copper. It is specified for operation up to 150 °C junction temperature and storage between −65 °C and +150 °C, with non-repetitive surge capability of 0.6 A for 100 μs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VZ (nominal) | 43 V - precise DC reference voltage at IZ = 2 mA, ±2% tolerance ensures tight regulation in feedback loops. |
| Ptot | 400 mW - maximum continuous power dissipation at Tamb = 25 °C; derates linearly above ambient per Rth j-a = 315 K/W. |
| rdif | 45 Ω (typ.) - low dynamic impedance at IZ = 2 mA, minimizing output voltage variation under load changes. |
| SZ | +30 mV/K (typ.) - predictable positive temperature coefficient enabling stable biasing across operating temperature range. |
| IR | 50 nA at VR = 0.7×VZ - ultra-low reverse leakage preserves accuracy in high-impedance reference circuits. |
| Cd | 56 pF at f = 1 MHz, VR = 0 V - parasitic capacitance impacts high-frequency noise rejection and transient response. |
| IZSM | 0.6 A - non-repetitive peak reverse surge current rating for ESD/overvoltage event handling (100 μs pulse). |
Pinout & Package
Two-terminal SOD110 ceramic surface-mount package: anode (pin 1) and cathode (pin 2), with cathode identified by a visible mark on top surface. Mounting requires standard reflow profile compatible with Pb-free soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (1) | Forward current entry / reverse voltage reference ground node | Connected to circuit ground or lower-potential rail; defines polarity for Zener operation in reverse bias. |
| Cathode (2) | Reverse-biased terminal / regulated output node | Connected to input supply; reverse voltage applied here establishes 43 V reference at anode relative to cathode. |
Key Features
| Feature | Design Value |
|---|---|
| ±2% VZ tolerance | Enables accurate voltage setting without post-manufacture trimming in precision analog circuits. |
| 400 mW power rating | Supports stable regulation in low-current applications (≤9.3 mA at 43 V) without external heat sinking. |
| SOD110 ceramic package | Provides hermetic sealing and stable parametric performance across humidity and thermal cycling. |
| +30 mV/K tempco | Compensates for negative tempcos of other components (e.g., transistors) in bias networks. |
| 50 nA max reverse leakage | Minimizes error current in high-impedance voltage divider or op-amp reference inputs. |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
|
Use Scenario: Providing stable 43 V reference for adjustable switching regulator feedback networks in DC-DC converters. IC Role / Device Role / Timing Role: Voltage reference element defining output setpoint via resistive divider connected to error amplifier input. Use Value: Tight ±2% tolerance and low rdif ensure <1% output voltage drift over line/load variations and temperature. |
Use Scenario: Protecting microcontroller I/O pins from transient overvoltage events exceeding 43 V. IC Role / Device Role / Timing Role: Shunt clamping device conducting excess energy to ground when input exceeds VZ. Use Value: 0.6 A non-repetitive surge rating absorbs short-duration spikes without degradation, preserving downstream logic integrity. |
| Current Source Bias | Temperature-Stable Oscillator Trim |
|
Use Scenario: Generating constant current for LED biasing or sensor excitation using a series resistor and BZX284-B43,115. IC Role / Device Role / Timing Role: Fixed-voltage node establishing known voltage drop across current-setting resistor. Use Value: +30 mV/K tempco counterbalances resistor tempco, yielding <±50 ppm/°C current stability over −40 to +125 °C. |
Use Scenario: Fine-tuning oscillator frequency in crystal-based timing circuits where VZ adjusts varactor bias. IC Role / Device Role / Timing Role: Precision DC bias source controlling varactor diode capacitance in VCO tuning network. Use Value: Low 56 pF junction capacitance avoids loading crystal resonance; stable VZ prevents frequency drift during thermal transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STMicroelectronics BZT52-B43 | Same SOD123 package (larger than SOD110); 43 V ±2%, 500 mW rating; rdif = 70 Ω (higher impedance). | Requires PCB pad revision due to larger footprint; higher power allows marginally higher current but less board density. | Select when higher surge robustness or legacy SOD123 layout reuse is prioritized over miniaturization. |
| Vishay PLZ43 | SOD123 package; 43 V ±5%, 500 mW; rdif = 90 Ω; tempco unspecified in datasheet. | Lacks tight tolerance and documented tempco-unsuitable for precision references but acceptable for coarse clamping. | Choose only for cost-sensitive, non-critical overvoltage protection where ±5% VZ is acceptable. |
Compared with BZX284-B43,115, BZT52-B43 offers higher power but sacrifices board space and low-impedance regulation, while PLZ43 trades tolerance and tempco control for cost-making the NXP part optimal for compact, precision-regulated designs.
Availability
BZX284-B43,115 is available at Aetrix Electronics and suitable for power supply reference, overvoltage clamp, and current source bias applications requiring stable component supply, consistent parametric performance, and long-term obsolescence management.
Supply support for BZX284-B43,115 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 consumer markets.
The BZX284 series was engineered for high-accuracy, low-power voltage regulation in miniaturized SMD applications-emphasizing tight tolerance, stable tempco, and robust ceramic packaging for reliability in demanding environments.
FAQ
What is the nominal Zener voltage and tolerance of BZX284-B43,115?
The BZX284-B43,115 has a nominal Zener voltage of 43 V with a ±2% tolerance, measured at a test current of 2 mA. This means its actual breakdown voltage falls within 42.1 V to 43.9 V under standard conditions, making it suitable for precision reference applications where tight voltage control is required. The BZX284-B43,115 achieves this specification using NXP's optimized silicon process and ceramic SOD110 packaging.
What is the maximum power dissipation rating for BZX284-B43,115?
The BZX284-B43,115 is rated for a maximum total power dissipation of 400 mW at an ambient temperature of 25 °C. This rating assumes mounting on a standard PCB (11 × 25 × 1.6 mm) and derates linearly with increasing ambient temperature based on a thermal resistance of 315 K/W. Exceeding this limit risks thermal runaway or permanent parameter shift. The BZX284-B43,115 must be used within this boundary to maintain long-term reliability and regulation accuracy.
Does BZX284-B43,115 have a specified temperature coefficient, and what does it mean for circuit design?
Yes, the BZX284-B43,115 has a typical temperature coefficient of +30 mV/K at IZ = 2 mA. This positive value indicates that its Zener voltage increases predictably with rising junction temperature-enabling compensation in bias networks where other components exhibit negative tempcos. For example, pairing the BZX284-B43,115 with a resistor having a matched negative tempco yields highly stable current sources. This behavior is confirmed in Figure 4 of the official NXP datasheet for the BZX284-B43,115.
What is the reverse leakage current specification for BZX284-B43,115, and under what condition is it measured?
The reverse leakage current (IR) for BZX284-B43,115 is specified as a maximum of 50 nA, measured at a reverse voltage of 0.7 × VZ (i.e., ~30.1 V). This ultra-low leakage ensures minimal error current in high-impedance reference paths, such as op-amp feedback dividers or precision ADC references. The BZX284-B43,115 maintains this performance across its full operating temperature range, supporting accuracy-critical analog signal chains.
What package type does BZX284-B43,115 use, and what are its key mechanical dimensions?
The BZX284-B43,115 uses the SOD110 very small ceramic surface-mount package, measuring 2.10 mm × 1.40 mm × 1.60 mm (L × W × H) with a cathode identification mark on the top surface. Its compact size supports high-density PCB layouts, and the ceramic body provides hermeticity and thermal stability superior to plastic-packaged alternatives. The BZX284-B43,115 is compatible with standard reflow soldering profiles, including Pb-free processes, as defined in the NXP package outline document.
BZX284-B43,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- SOD-110
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 43 V
- Tolerance:
- ±2%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 30.1 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-B43,115 FAQ
1.How can I place an order for BZX284-B43,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX284-B43,115 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-B43,115 reliable?
The price and inventory of BZX284-B43,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX284-B43,115 is usually 5 days.
3.What payment methods are accepted for BZX284-B43,115?
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4.How is shipping managed for BZX284-B43,115?
BZX284-B43,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX284-B43,115 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-B43,115?
For technical support, including BZX284-B43,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX284-B43,115 requirements.
6.How does Aetrix verify that BZX284-B43,115 is sourced from the original manufacturer or authorized distributors?
All BZX284-B43,115 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-B43,115 meets industry standards.
7.What is the process for return or replacement of BZX284-B43,115?
All BZX284-B43,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX284-B43,115, 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-B43,115 part is unused and in its original packaging.
Return procedure for BZX284-B43,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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