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onsemi BZX55C2V4_T50A
- Part No.:
- BZX55C2V4_T50A
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
BZX55C2V4_T50A.pdf
- Description:
- DIODE ZENER 2.4V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:8,031
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Product details
Overview
BZX55C2V4_T50A from Fairchild Semiconductor is a 2.4 V, ±5% tolerance Zener diode in DO-35 glass package, rated for 500 mW power dissipation at TL ≤ 75°C with 85 Ω dynamic impedance at 5 mA test current and 50 μA reverse leakage at 1 V reverse voltage. It serves as a precision voltage reference or overvoltage clamp in low-power analog and power supply feedback circuits.
For engineers reviewing the BZX55C2V4_T50A datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage accuracy, thermal derating behavior, cathode identification via band marking, and compatibility with through-hole PCB layouts requiring DO-35 footprint compliance.
Technical Context
The BZX55C2V4_T50A operates as a silicon planar Zener diode with sharp reverse breakdown at nominal 2.4 V, designed for stable regulation under DC bias conditions. Its 5% voltage tolerance and 85 Ω impedance at 5 mA reflect tight process control for low-current reference use.
Thermal performance is defined by a 4.0 mW/°C derating slope above 75°C lead temperature and a -65°C to +200°C operating/storage range, enabling deployment in industrial ambient environments where passive thermal management is used.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 2.28 V min / 2.56 V max at 5 mA - defines usable regulation window for 2.4 V nominal reference |
| Tolerance | ±5% - ensures predictable clamping threshold across production lots |
| Power Dissipation (PD) | 500 mW @ TL ≤ 75°C - sets maximum continuous DC power handling before thermal derating |
| Dynamic Impedance (ZZ) | 85 Ω @ 5 mA - indicates regulation stiffness; lower values improve load regulation |
| Reverse Leakage (IR) | 50 μA @ 1 V - quantifies off-state conduction; critical for low-power standby circuits |
| Forward Voltage (VF) | ≤1.3 V @ 100 mA - confirms standard silicon PN junction behavior for forward-bias use cases |
| Operating Temp Range | -65°C to +200°C - supports operation in extended-temperature industrial and automotive under-hood applications |
Pinout & Package
DO-35 glass axial package with cathode identified by a single color band on the body. Leads are tinned copper-clad steel, 3/8" length specified for thermal rating compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive terminal in forward bias; connected to lower potential in Zener mode | Accepts current flow toward cathode during reverse breakdown; requires series limiting resistor |
| Cathode | Negative terminal in forward bias; connected to higher potential in Zener mode | Marked by color band; referenced point for regulated output voltage in shunt regulator configurations |
Key Features
| Feature | Design Value |
|---|---|
| Stable Zener voltage at low current | Specified at 5 mA test current - enables accurate regulation in micro-power feedback loops |
| Low dynamic impedance | 85 Ω - minimizes output voltage variation under changing load currents |
| Hermetic glass package | DO-35 construction - provides long-term reliability and moisture resistance without conformal coating |
| Cathode band marking | Visible color band - ensures unambiguous polarity identification during manual assembly and inspection |
| Wide temperature range | -65°C to +200°C - supports use in high-reliability applications including industrial controls and sensor conditioning |
Applications
| Power Supply Feedback | Overvoltage Protection |
|---|---|
Use Scenario: Shunt regulator in isolated flyback converter secondary-side feedback network. IC Role / Device Role / Timing Role: Zener reference providing stable 2.4 V threshold to optocoupler input LED. Use Value: Enables precise output voltage regulation within ±5% tolerance despite transformer winding ratio variations. | Use Scenario: Clamp circuit protecting microcontroller I/O pins from ESD-induced transients. IC Role / Device Role / Timing Role: Fast-acting voltage limiter diverting surge current to ground when voltage exceeds 2.56 V. Use Value: Limits transient peak to safe level below MCU absolute maximum rating while maintaining low leakage in normal operation. |
| Sensor Signal Conditioning | Reference Voltage Source |
Use Scenario: Biasing thermistor bridge in analog temperature measurement circuit. IC Role / Device Role / Timing Role: Provides stable excitation reference for ratiometric ADC conversion. Use Value: Reduces measurement drift caused by supply rail variation due to ±5% VZ tolerance and low tempco. | Use Scenario: Low-cost voltage reference for comparator hysteresis setting in battery monitor. IC Role / Device Role / Timing Role: Fixed 2.4 V threshold generator defining upper/lower trip points. Use Value: Delivers repeatable switching thresholds with minimal parts count and no external trimming required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4730A | Same 3.9 V nominal rating but different voltage family; BZX55C2V4_T50A is 2.4 V part | Not interchangeable due to 1.5 V difference in nominal Zener voltage | Select only if 2.4 V regulation is not required; verify circuit compliance with 3.9 V threshold |
| BZX55C2V4-TP | Identical electrical specs and DO-35 package; differs only in tape-and-reel packaging format (TP vs T50A) | No functional or layout impact; suitable for automated SMT placement with carrier tape | Prefer BZX55C2V4-TP for high-volume pick-and-place assembly; BZX55C2V4_T50A suits manual or low-volume through-hole use |
Compared with 1N4730A and BZX55C2V4-TP, the BZX55C2V4_T50A offers exact 2.4 V regulation in bulk-packaged DO-35 form, making it optimal for prototyping and repair where voltage matching and axial lead compatibility are essential.
Availability
BZX55C2V4_T50A is available at Aetrix Electronics and suitable for power supply feedback, overvoltage protection, and sensor signal conditioning requiring stable component supply and consistent DO-35 mechanical fit.
Supply support for BZX55C2V4_T50A 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
Fairchild Semiconductor was a U.S.-based semiconductor company specializing in power management, analog, and discrete components before its acquisition by ON Semiconductor in 2016.
The BZX55 series was developed as a general-purpose Zener diode family targeting cost-sensitive, high-reliability applications in industrial power supplies and analog signal chains.
FAQ
What is the nominal Zener voltage of BZX55C2V4_T50A and how tightly is it controlled?
The BZX55C2V4_T50A has a nominal Zener voltage of 2.4 V with a guaranteed range of 2.28 V to 2.56 V at 5 mA test current, reflecting ±5% tolerance. This specification is measured under thermal equilibrium at 30°C ±1°C lead temperature with 3/8" lead length, ensuring repeatability in production testing and design validation for BZX55C2V4_T50A.
How does the power derating of BZX55C2V4_T50A work above 75°C?
The BZX55C2V4_T50A derates linearly at 4.0 mW/°C above a lead temperature of 75°C, meaning its maximum allowable power drops to 496 mW at 76°C and continues decreasing until reaching zero at approximately 200°C. This behavior is defined in the Absolute Maximum Ratings table and must be applied in thermal design for BZX55C2V4_T50A to prevent junction overheating.
Is BZX55C2V4_T50A compatible with automated through-hole insertion equipment?
Yes, the BZX55C2V4_T50A uses standard DO-35 axial leads with 3/8" length and tinned copper-clad steel construction, meeting common requirements for wave soldering and axial component insertion machines. Its glass body and cathode band marking also support optical orientation detection during automated assembly of BZX55C2V4_T50A.
What is the maximum reverse leakage current for BZX55C2V4_T50A and at what voltage is it specified?
The BZX55C2V4_T50A exhibits a maximum reverse leakage current of 50 μA at 1 V reverse voltage, measured at 25°C. This parameter is critical for low-power applications such as battery-backed circuits or high-impedance sensor interfaces where even small leakage could affect accuracy or runtime - a key design consideration for BZX55C2V4_T50A.
Can BZX55C2V4_T50A be used in place of other BZX55C-series diodes with different voltage ratings?
No - the BZX55C2V4_T50A is specifically rated for 2.4 V Zener voltage and is not interchangeable with other BZX55C variants (e.g., BZX55C3V3 or BZX55C5V1) due to fundamental differences in breakdown characteristics. Substituting BZX55C2V4_T50A into circuits designed for other voltages will result in incorrect regulation or protection thresholds.
BZX55C2V4_T50A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 2.4 V
- Tolerance:
- ±6%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 85 Ohms
- Current - Reverse Leakage @ Vr:
- 50 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.3 V @ 100 mA
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-35
BZX55C2V4_T50A FAQ
1.How can I place an order for BZX55C2V4_T50A through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX55C2V4_T50A 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 BZX55C2V4_T50A reliable?
The price and inventory of BZX55C2V4_T50A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX55C2V4_T50A is usually 5 days.
3.What payment methods are accepted for BZX55C2V4_T50A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX55C2V4_T50A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX55C2V4_T50A?
BZX55C2V4_T50A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX55C2V4_T50A 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 BZX55C2V4_T50A?
For technical support, including BZX55C2V4_T50A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX55C2V4_T50A requirements.
6.How does Aetrix verify that BZX55C2V4_T50A is sourced from the original manufacturer or authorized distributors?
All BZX55C2V4_T50A 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 BZX55C2V4_T50A meets industry standards.
7.What is the process for return or replacement of BZX55C2V4_T50A?
All BZX55C2V4_T50A units undergo pre-shipment inspection (PSI). If there is an issue with BZX55C2V4_T50A, 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 BZX55C2V4_T50A part is unused and in its original packaging.
Return procedure for BZX55C2V4_T50A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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