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NXP Semiconductors BZX284-B68,115
- Part No.:
- BZX284-B68,115
- Manufacturer:
- NXP Semiconductors
- Category:
- Single Zener Diodes
- Package:
- SOD-110
- Datasheet:
-
BZX284-B68,115.pdf
- Description:
- DIODE ZENER 68V 400MW SOD110
- Quantity:
- Payment:
- Shipping:
Inventory:2,937
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Product details
Overview
BZX284-B68,115 from NXP Semiconductors is a ±2% tolerance Zener voltage regulator diode in a SOD110 ceramic SMD package, rated for 68 V nominal working voltage at IZtest = 2 mA, 400 mW total power dissipation, and 75 Ω typical differential resistance at test current. It serves as a precision low-power voltage reference in power supply feedback paths, overvoltage protection circuits, and analog signal conditioning stages.
For engineers reviewing the BZX284-B68,115 datasheet, BZX284-B68,115 pinout, BZX284-B68,115 application, or BZX284-B68,115 equivalent, key selection criteria include its 68 V Zener voltage tolerance (±2%), thermal resistance of 315 K/W, reverse leakage current ≤50 nA at 0.7×VZnom, and suitability for space-constrained SMD designs requiring stable regulation below 400 mW.
Technical Context
The BZX284-B68,115 operates as a silicon planar Zener diode with avalanche breakdown mechanism above 6 V, delivering stable reverse-biased voltage regulation under controlled test current conditions. Its temperature coefficient of +55 mV/K (typical) at IZ = 2 mA indicates positive drift with junction temperature - critical for bias network stability in wide-temperature-range applications.
Designed for surface-mount assembly on standard PCBs (11 × 25 × 1.6 mm), the device exhibits 71.7 pF diode capacitance at 0 V reverse bias and 1 MHz, and supports non-repetitive peak reverse surge currents up to 0.25 A for 100 μs pulses - enabling transient suppression in low-energy clamp circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 66.6 V to 69.4 V at IZ = 2 mA - defines tight ±2% regulation window for precision reference use |
| Differential Resistance rdif | 75 Ω (typical) at IZ = 2 mA - determines output impedance and load regulation sensitivity |
| Power Dissipation Ptot | 400 mW at Tamb = 25 °C - sets maximum continuous DC power handling before thermal derating |
| Reverse Leakage IR | ≤50 nA at VR = 47.6 V (0.7×VZnom) - ensures minimal quiescent current in high-impedance bias networks |
| Thermal Resistance Rth j-a | 315 K/W - quantifies junction-to-ambient heat transfer efficiency on standard PCB mounting |
| Diode Capacitance Cd | 71.7 pF at f = 1 MHz, VR = 0 V - impacts high-frequency noise filtering and AC response in regulation loops |
| Temperature Coefficient SZ | +55 mV/K (typical) at IZ = 2 mA - specifies voltage drift per degree Celsius for thermal design margining |
Pinout & Package
Package: SOD110 - very small ceramic rectangular surface-mounted 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 circuit ground or lower potential node in reverse-bias regulation configuration |
| Cathode (2) | Zener breakdown terminal / high-side connection | Connected to regulated voltage node; reverse-biased to maintain stable 68 V reference |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables tighter regulation accuracy than ±5% variants, reducing need for post-regulation trimming in feedback networks |
| SOD110 ceramic SMD package | Provides hermetic-like moisture resistance and thermal stability vs. plastic packages, supporting industrial reliability requirements |
| Low 71.7 pF junction capacitance | Minimizes high-frequency loading on reference nodes, preserving signal integrity in fast-switching power supplies |
| Positive temperature coefficient (+55 mV/K) | Allows predictable compensation when paired with negative-coefficient components in temperature-stable references |
| 400 mW power rating with 315 K/W Rth j-a | Supports operation up to ~105 °C ambient without external heatsinking in typical PCB layouts |
Applications
| Industrial Power Supply Feedback | Overvoltage Clamp for Microcontroller I/O |
|---|---|
|
Use Scenario: Regulating output voltage in isolated flyback converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Zener reference providing precise 68 V threshold to control TL431 or optocoupler LED current. Use Value: Tight ±2% tolerance ensures consistent output regulation across production batches without manual calibration. |
Use Scenario: Protecting 3.3 V or 5 V microcontroller GPIO pins from accidental 24 V field wiring faults. IC Role / Device Role / Timing Role: Low-capacitance clamp diode shunting transients above 68 V to ground before reaching sensitive inputs. Use Value: 71.7 pF capacitance avoids signal distortion on high-speed digital lines while absorbing short-duration surges. |
| Programmable Reference Voltage Generator | Current Source Bias Network Stabilizer |
|
Use Scenario: Setting adjustable reference voltage using resistor divider + Zener in precision DAC output buffers. IC Role / Device Role / Timing Role: Stable 68 V anchor point enabling accurate scaling of lower-voltage references via ratio-matched resistors. Use Value: +55 mV/K temperature coefficient allows complementary cancellation with resistor TC in compensated designs. |
Use Scenario: Stabilizing base-emitter voltage of high-side PNP current source transistors in analog sensor front-ends. IC Role / Device Role / Timing Role: Providing fixed reverse-bias voltage to bias transistor operating point independent of supply variation. Use Value: 400 mW rating supports sustained operation under worst-case current-source dissipation without thermal runaway. |
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-B68 | Same 68 V ±2%, SOD-123 package (2.7 × 1.6 × 1.1 mm), higher 100 Ω rdif, 500 nA IR at 47.6 V | Larger footprint; less suitable for ultra-dense layouts but offers wider availability in distribution channels | Select when board real estate permits larger SOD-123 and higher leakage is acceptable in low-power sleep modes |
| Vishay BZX84-C68 | 68 V ±5%, SOT-23 package, 100 Ω rdif, 100 nA IR at 47.6 V, 350 mW Ptot | Looser tolerance and lower power rating; requires recalibration of feedback dividers and thermal derating | Choose only for cost-sensitive, non-critical regulation where ±5% accuracy suffices and layout accommodates SOT-23 |
Compared with BZX284-B68,115, the BZT52-B68 trades tighter mechanical integration for slightly degraded regulation impedance and leakage, while the BZX84-C68 sacrifices accuracy and power headroom for broader distributor stock - making the BZX284-B68,115 optimal for space-constrained, precision industrial designs.
Availability
BZX284-B68,115 is available at Aetrix Electronics and suitable for industrial power supplies, microcontroller I/O protection circuits, programmable reference generators, and current source bias networks requiring stable component supply with guaranteed long-term sourcing.
Supply support for BZX284-B68,115 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 developed for high-reliability, low-power voltage regulation in space-constrained SMD designs - emphasizing precision tolerance, thermal stability, and robustness in harsh industrial environments.
FAQ
What is the Zener voltage tolerance of the BZX284-B68,115?
The BZX284-B68,115 has a ±2% Zener voltage tolerance, meaning its nominal 68 V working voltage is specified between 66.6 V and 69.4 V at IZ = 2 mA. This tighter tolerance enables higher accuracy in feedback and reference applications compared to ±5% variants like the BZX284-C68, and is confirmed in Table 2 of the NXP datasheet.
What package type does the BZX284-B68,115 use?
The BZX284-B68,115 uses the SOD110 package - a very small ceramic rectangular surface-mount device measuring 2.10 × 1.40 × 1.60 mm, with cathode identification via a band on the top surface. This package is distinct from plastic SOD-123 or SOT-23 variants and provides enhanced thermal and moisture resistance per NXP's package outline documentation.
What is the maximum power dissipation for the BZX284-B68,115?
The BZX284-B68,115 has a maximum total power dissipation of 400 mW at an ambient temperature of 25 °C, as stated in the Limiting Values table. Derating is required above 25 °C at 1.27 mW/°C (based on Rth j-a = 315 K/W), and this rating assumes mounting on a 11 × 25 × 1.6 mm PCB per the thermal test condition.
How does the temperature coefficient affect BZX284-B68,115 performance?
The BZX284-B68,115 exhibits a typical temperature coefficient of +55 mV/K at IZ = 2 mA, indicating its Zener voltage increases with rising junction temperature. This positive drift must be accounted for in temperature-critical applications such as precision references, and can be compensated using complementary negative-TC components in the same circuit.
What is the reverse leakage current specification for BZX284-B68,115?
The reverse leakage current for BZX284-B68,115 is specified as ≤50 nA at VR = 47.6 V (0.7 × VZnom), per the Electrical Characteristics table. This low leakage ensures minimal error contribution in high-impedance bias networks and maintains regulation accuracy even in battery-powered or ultra-low-quiescent-current designs.
BZX284-B68,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- SOD-110
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 68 V
- Tolerance:
- ±2%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 160 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 47.6 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-B68,115 FAQ
1.How can I place an order for BZX284-B68,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX284-B68,115 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-B68,115 reliable?
The price and inventory of BZX284-B68,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX284-B68,115 is usually 5 days.
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Once your BZX284-B68,115 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-B68,115?
For technical support, including BZX284-B68,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX284-B68,115 requirements.
6.How does Aetrix verify that BZX284-B68,115 is sourced from the original manufacturer or authorized distributors?
All BZX284-B68,115 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-B68,115 meets industry standards.
7.What is the process for return or replacement of BZX284-B68,115?
All BZX284-B68,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX284-B68,115, 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-B68,115 part is unused and in its original packaging.
Return procedure for BZX284-B68,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX284-B68,115 Tags
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