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NXP Semiconductors BZX284-C39,115
- Part No.:
- BZX284-C39,115
- Manufacturer:
- NXP Semiconductors
- Category:
- Single Zener Diodes
- Package:
- SOD-110
- Datasheet:
-
BZX284-C39,115.pdf
- Description:
- DIODE ZENER 39V 400MW SOD110
- Quantity:
- Payment:
- Shipping:
Inventory:8,880
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Product details
Overview
BZX284-C39,115 from NXP Semiconductors is a ±5% tolerance Zener voltage regulator diode in a SOD110 ceramic SMD package, rated for 39 V nominal working voltage at 2 mA test current, 400 mW total power dissipation, and 300 Ω typical differential resistance. 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-C39,115 datasheet, BZX284-C39,115 pinout, BZX284-C39,115 application, or BZX284-C39,115 equivalent, key selection criteria include its 39 V Zener voltage tolerance (±5%), 300 Ω dynamic impedance at 2 mA, −25 mV/K temperature coefficient, 58 pF junction capacitance at 0 V, and SOD110 package thermal resistance of 315 K/W.
Technical Context
The BZX284-C39,115 operates as a reverse-biased silicon Zener diode with controlled avalanche breakdown at 39 V, optimized for stable DC voltage regulation under low-current conditions (IZtest = 2 mA). Its SOD110 ceramic package enables high thermal stability and minimal parasitic capacitance.
It exhibits a negative temperature coefficient of −25 mV/K at 2 mA, indicating decreasing Zener voltage with rising junction temperature - a critical factor in temperature-sensitive reference designs. The device's 58 pF junction capacitance at 0 V reverse bias supports use in moderate-frequency noise filtering applications without significant signal distortion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 38.2–39.8 V at IZ = 2 mA; defines precise regulation point for feedback or clamp circuits |
| Differential Resistance (rdif) | 40–300 Ω at IZ = 0.5/2 mA; determines output voltage stability under load variation |
| Temperature Coefficient (SZ) | −25 mV/K at IZ = 2 mA; quantifies voltage drift per degree Celsius rise in junction temperature |
| Junction Capacitance (Cd) | 58 pF at f = 1 MHz, VR = 0 V; impacts high-frequency noise suppression capability |
| Total Power Dissipation (Ptot) | 400 mW at Tamb = 25 °C; sets maximum continuous power handling on standard PCB |
| Reverse Current (IR) | 50 nA at VR = 0.7 × VZnom; indicates leakage level below regulation threshold |
| Non-repetitive Peak Current (IZSM) | 0.7 A at tp = 100 μs; defines surge withstand capability during transient events |
Pinout & Package
Package: SOD110 - very small ceramic rectangular surface-mount package (2.10 × 1.40 × 1.60 mm), cathode marked by band on top surface.
| 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) | Reverse breakdown terminal / high-side connection | Connected to input voltage source; regulates voltage at cathode-to-anode drop |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables cost-effective voltage referencing where tight regulation is not required, e.g., non-critical biasing or coarse clamping |
| 400 mW power rating in SOD110 | Supports higher current regulation than standard 250 mW SOD-323 Zeners while maintaining ultra-small footprint |
| Low 58 pF junction capacitance | Minimizes signal coupling in RF-adjacent or high-speed analog circuits using Zener-based filtering |
| −25 mV/K temperature coefficient | Allows predictable thermal drift compensation in multi-diode reference networks or temperature-sensing circuits |
| Ceramic SOD110 construction | Provides superior moisture resistance and long-term parameter stability vs. plastic-packaged Zeners |
Applications
| Power Supply Feedback Reference | Overvoltage Clamp Protection |
|---|---|
Use Scenario: Used in secondary-side feedback loop of isolated DC-DC converters to regulate output voltage via optocoupler-coupled error amplifier. IC Role / Device Role / Timing Role: Zener reference element setting precise trip point for TL431 or similar shunt regulator IC. Use Value: 39 V nominal voltage matches common 36–42 V industrial output rails; ±5% tolerance accommodates design margin without trimming. | Use Scenario: Placed across sensitive input pins of microcontrollers or ADCs to limit transient overvoltage from ESD or inductive switching. IC Role / Device Role / Timing Role: Passive clamping device diverting excess energy to ground before IC damage occurs. Use Value: 0.7 A non-repetitive peak current rating handles IEC 61000-4-2 Level 4 ESD pulses; 58 pF capacitance avoids signal integrity degradation. |
| Analog Signal Level Shifting | Temperature-Compensated Reference |
Use Scenario: Biasing op-amp inputs in single-supply sensor interfaces to establish mid-rail reference voltage. IC Role / Device Role / Timing Role: Stable DC offset generator providing fixed 39 V reference for rail-to-rail signal translation. Use Value: Low 300 Ω dynamic impedance ensures minimal loading error when driving high-impedance op-amp inputs. | Use Scenario: Paired with forward-biased diode(s) in temperature-stable voltage reference strings for precision instrumentation. IC Role / Device Role / Timing Role: Negative TC component balancing positive TC of silicon junctions in composite reference design. Use Value: −25 mV/K coefficient enables accurate cancellation of +2 mV/K per diode in series configurations up to 12 diodes. |
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-C39 | Same 39 V ±5%, SOD-123 package, 500 mW rating, 600 Ω rdif at 5 mA | Higher power rating but larger footprint and higher dynamic impedance reduce precision in low-current references | Select for higher surge robustness where board space allows; avoid in space-constrained, low-drift designs |
| Vishay BZX84-C39 | Same 39 V ±5%, SOT-23 package, 300 mW rating, 300 Ω rdif at 5 mA, −25 mV/K TC | Plastic package offers lower cost but reduced long-term stability and moisture resistance vs. ceramic SOD110 | Select for cost-sensitive consumer applications; prefer BZX284-C39,115 for industrial environments requiring reliability |
Compared with BZT52-C39 and BZX84-C39, the BZX284-C39,115 delivers superior thermal stability and humidity resistance due to its ceramic SOD110 package, while matching key electrical parameters - making it optimal for mission-critical industrial and automotive subsystems where long-term parameter drift must be minimized.
Availability
BZX284-C39,115 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and medical sensor interfaces requiring stable component supply and long-lifecycle support.
Supply support for BZX284-C39,115 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 specifically for high-reliability, low-power voltage regulation in space-constrained SMD applications - emphasizing ceramic packaging, tight parametric consistency, and extended temperature stability.
FAQ
What is the Zener voltage tolerance of the BZX284-C39,115?
The BZX284-C39,115 has a ±5% Zener voltage tolerance, meaning its nominal 39 V regulation point falls within 37.0 V to 41.0 V at 2 mA test current. This tolerance aligns with the "C" series designation in the BZX284 family and is verified per NXP's 2002 product data sheet Table 2. The BZX284-C39,115 is intended for applications where moderate regulation accuracy suffices, such as non-critical biasing or overvoltage protection.
What package type does the BZX284-C39,115 use and what are its dimensions?
The BZX284-C39,115 uses the SOD110 package - a very small ceramic rectangular surface-mount outline measuring 2.10 mm × 1.40 mm × 1.60 mm (length × width × height). Per NXP's package drawing (issue date 97-04-14), it features a cathode identifier band on the top surface and is optimized for high thermal stability and moisture resistance. This differs from plastic SOT-23 or SOD-123 packages used by many competing Zeners.
What is the differential resistance of the BZX284-C39,115 and why does it matter?
The BZX284-C39,115 has a differential resistance (rdif) of 40 Ω minimum and 300 Ω maximum at IZ = 0.5 mA and 2 mA respectively, with typical values around 300 Ω. This parameter directly affects regulation accuracy: lower rdif means less output voltage variation under changing load current. For the BZX284-C39,115, this value supports stable reference generation in low-current (<5 mA) applications like feedback networks or clamping circuits where precision matters more than raw power handling.
Does the BZX284-C39,115 have a positive or negative temperature coefficient?
The BZX284-C39,115 has a negative temperature coefficient of −25 mV/K at IZ = 2 mA, meaning its Zener voltage decreases by approximately 25 mV for every 1 °C rise in junction temperature. This behavior is confirmed in NXP's Figure 4 and Table 2. The BZX284-C39,115's negative TC enables predictable thermal drift compensation when combined with forward-biased diodes or resistive networks in precision reference designs.
What is the maximum non-repetitive peak reverse current rating for the BZX284-C39,115?
The BZX284-C39,115 is rated for a non-repetitive peak reverse current (IZSM) of 0.7 A at pulse width tp = 100 μs and ambient temperature Tamb = 25 °C prior to surge. This rating, specified in NXP's Limiting Values table, defines its transient overvoltage handling capability - sufficient for IEC 61000-4-2 ESD protection and inductive switch-off spike suppression. Exceeding this value risks permanent junction damage.
BZX284-C39,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- SOD-110
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 39 V
- Tolerance:
- ±5%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 75 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 27.3 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-C39,115 FAQ
1.How can I place an order for BZX284-C39,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX284-C39,115 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-C39,115 reliable?
The price and inventory of BZX284-C39,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX284-C39,115 is usually 5 days.
3.What payment methods are accepted for BZX284-C39,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX284-C39,115 transactions.
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4.How is shipping managed for BZX284-C39,115?
BZX284-C39,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX284-C39,115 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-C39,115?
For technical support, including BZX284-C39,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX284-C39,115 requirements.
6.How does Aetrix verify that BZX284-C39,115 is sourced from the original manufacturer or authorized distributors?
All BZX284-C39,115 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-C39,115 meets industry standards.
7.What is the process for return or replacement of BZX284-C39,115?
All BZX284-C39,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX284-C39,115, 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-C39,115 part is unused and in its original packaging.
Return procedure for BZX284-C39,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX284-C39,115 Tags
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