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onsemi BZX55C10_T50A
- Part No.:
- BZX55C10_T50A
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
BZX55C10_T50A.pdf
- Description:
- DIODE ZENER 10V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:2,172
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Product details
Overview
BZX55C10_T50A from Fairchild Semiconductor is a 10 V, ±5% tolerance silicon Zener diode in DO-35 glass package, rated for 500 mW power dissipation at 75°C with 15 Ω dynamic impedance at 5 mA test current and 0.1 μA maximum reverse leakage at 7.5 V. It provides precise voltage regulation in low-power reference and protection circuits.
For engineers reviewing the BZX55C10_T50A datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance, thermal derating behavior, junction temperature range, and DO-35 mechanical compatibility in space-constrained analog designs.
Technical Context
The BZX55C10_T50A operates as a two-terminal voltage reference device, maintaining stable reverse breakdown at nominal 10 V across its cathode-anode terminals under controlled current conditions. Its 15 Ω dynamic impedance (ZZ) at IZ = 5 mA ensures predictable regulation slope, while the -65°C to +200°C operating temperature range supports deployment in industrial and automotive ambient environments.
Designed for DC voltage clamping and reference generation, it exhibits 0.1 μA reverse leakage at VR = 7.5 V and a forward voltage of ≤1.3 V at IF = 100 mA. Power dissipation is thermally limited to 500 mW at TL ≤ 75°C, derating linearly by 4.0 mW/°C above that point.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.5–10.6 V at IZ = 5 mA; defines regulated output voltage window under nominal bias |
| Tolerance | ±5%; determines absolute accuracy of voltage reference in production circuits |
| Power Dissipation (PD) | 500 mW at TL ≤ 75°C; sets maximum continuous thermal load without derating |
| Dynamic Impedance (ZZ) | 15 Ω at IZ = 5 mA; indicates regulation stiffness against current variation |
| Reverse Leakage (IR) | ≤0.1 μA at VR = 7.5 V; ensures minimal quiescent current in standby clamp configurations |
| Junction Temp Range | -65°C to +200°C; enables operation in extended-temperature industrial and under-hood applications |
| Forward Voltage (VF) | ≤1.3 V at IF = 100 mA; supports use as low-drop rectifier or polarity indicator in dual-role designs |
Pinout & Package
DO-35 glass axial package with cathode indicated by color band; two-terminal device requiring no external biasing circuitry beyond series current-limiting resistor.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener breakdown return path | Connected to lower-potential node in shunt regulator or clamp configuration |
| Cathode | Zener breakdown terminal / Reference output node | Connected to regulated voltage rail; marked with color band on DO-35 body |
Key Features
| Feature | Design Value |
|---|---|
| ±5% VZ tolerance | Enables single-bin calibration in cost-sensitive voltage reference designs without trimming |
| DO-35 glass package | Provides hermetic sealing and thermal stability for long-term parameter drift <100 ppm/°C |
| 500 mW power rating | Supports direct replacement of legacy 1N47xx series in low-current (<50 mA) regulation paths |
| 15 Ω dynamic impedance | Delivers <2% output deviation over 1–10 mA load current swing in shunt reference topologies |
| -65°C to +200°C operation | Validates suitability for engine control units, power supply feedback loops, and outdoor sensor nodes |
Applications
| Overvoltage Protection Clamp | Low-Power Voltage Reference |
|---|---|
Use Scenario: Protecting microcontroller I/O pins from ESD transients or supply rail overshoot in industrial PLC modules. IC Role / Device Role / Timing Role: Shunt clamping element diverting excess energy to ground when input exceeds 10 V threshold. Use Value: Limits transient voltage to ≤10.6 V with <0.1 μA standby leakage, preserving signal integrity without loading source. | Use Scenario: Providing stable 10 V reference for 8-bit ADC biasing in battery-powered environmental sensors. IC Role / Device Role / Timing Role: Passive voltage reference source establishing precision scaling for analog front-end conversion. Use Value: Delivers ±5% accuracy over -40°C to +85°C with <15 Ω output impedance, minimizing code spread in digitized measurements. |
| Power Supply Feedback Divider | Signal Level Translation |
Use Scenario: Setting output voltage in isolated flyback converter using optocoupler feedback network. IC Role / Device Role / Timing Role: Precision Zener element defining upper divider node in secondary-side error amplifier loop. Use Value: Maintains regulation accuracy within ±1% over line/load variations due to tight VZ tolerance and low ZZ. | Use Scenario: Converting 12 V logic signals to 10 V compatible levels for mixed-voltage interface between legacy and modern peripherals. IC Role / Device Role / Timing Role: Clamping diode limiting high-side swing to 10.6 V while passing low-state transitions unattenuated. Use Value: Enables level-shifting without active components, leveraging sharp Zener knee and sub-μA leakage below 7.5 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4740A | Same 10 V nominal rating but ±5% tolerance; 1.0 W power rating vs. 500 mW; DO-41 package | Higher power handling supports >50 mA clamp currents; larger DO-41 footprint requires PCB redesign | Select when higher surge energy absorption is required and board space permits larger package |
| BZX55C10-TP | Identical electrical specs and DO-35 package; manufactured by Micro Commercial Components (MCC) with same marking convention | No functional or mechanical difference; fully interchangeable in existing DO-35 footprints | Preferred for dual-sourcing continuity where Fairchild supply is constrained |
Compared with BZX55C10_T50A, the 1N4740A offers double the power rating but requires layout change, while BZX55C10-TP delivers identical performance and form factor for seamless second-source procurement.
Availability
BZX55C10_T50A is available at Aetrix Electronics and suitable for overvoltage protection, low-power voltage reference, and power supply feedback applications requiring stable component supply across industrial automation, sensor interface, and embedded power management designs.
Supply support for BZX55C10_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, signal conditioning, and discrete components before its acquisition by ON Semiconductor in 2016.
The BZX55C10_T50A belongs to the BZX55C series of general-purpose Zener diodes engineered for precision voltage regulation and transient suppression in cost-sensitive, high-reliability analog circuits.
FAQ
What is the nominal Zener voltage and tolerance of the BZX55C10_T50A?
The BZX55C10_T50A has a nominal Zener voltage of 10 V with a tolerance of ±5%, meaning its actual breakdown voltage falls between 9.5 V and 10.6 V when tested at 5 mA. This specification is measured under thermal equilibrium at lead temperature of 30°C ±1°C with 3/8" lead length, and applies directly to the BZX55C10_T50A as confirmed in the Fairchild datasheet Rev. D1.
What package type does the BZX55C10_T50A use, and how is polarity identified?
The BZX55C10_T50A uses the DO-35 glass axial package, with cathode polarity indicated by a distinct color band on the body. This marking aligns with industry-standard DO-35 conventions and is explicitly documented for the BZX55C10_T50A in the Fairchild BZX55C2V4–BZX55C56 datasheet. The anode and cathode terminals are accessible at opposite ends of the glass capsule.
What is the maximum power dissipation and thermal derating behavior of the BZX55C10_T50A?
The BZX55C10_T50A is rated for 500 mW power dissipation at lead temperature (TL) ≤ 75°C, with linear derating of 4.0 mW/°C above that temperature. This thermal profile is specified in the Absolute Maximum Ratings table of the official Fairchild datasheet and applies strictly to the BZX55C10_T50A under standard 3/8" lead length conditions.
What is the dynamic impedance (ZZ) and test condition for the BZX55C10_T50A?
The dynamic impedance (ZZ) of the BZX55C10_T50A is 15 Ω, measured at a Zener test current (IZ) of 5 mA and ambient temperature of 25°C. This value reflects the small-signal AC resistance across the breakdown region and is a key parameter for evaluating regulation stability - it is explicitly listed for the BZX55C10_T50A in the Electrical Characteristics table of the Fairchild datasheet.
Does the BZX55C10_T50A have specified reverse leakage current, and at what voltage is it measured?
Yes, the BZX55C10_T50A has a maximum reverse leakage current (IR) of 0.1 μA, measured at a reverse voltage (VR) of 7.5 V and ambient temperature of 25°C. This parameter is critical for low-power standby operation and is confirmed in the Electrical Characteristics table for the BZX55C10_T50A in the Fairchild BZX55C2V4–BZX55C56 datasheet Rev. D1.
BZX55C10_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):
- 10 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 7.5 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
BZX55C10_T50A FAQ
1.How can I place an order for BZX55C10_T50A through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX55C10_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 BZX55C10_T50A reliable?
The price and inventory of BZX55C10_T50A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX55C10_T50A is usually 5 days.
3.What payment methods are accepted for BZX55C10_T50A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX55C10_T50A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX55C10_T50A?
BZX55C10_T50A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX55C10_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 BZX55C10_T50A?
For technical support, including BZX55C10_T50A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX55C10_T50A requirements.
6.How does Aetrix verify that BZX55C10_T50A is sourced from the original manufacturer or authorized distributors?
All BZX55C10_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 BZX55C10_T50A meets industry standards.
7.What is the process for return or replacement of BZX55C10_T50A?
All BZX55C10_T50A units undergo pre-shipment inspection (PSI). If there is an issue with BZX55C10_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 BZX55C10_T50A part is unused and in its original packaging.
Return procedure for BZX55C10_T50A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX55C10_T50A Tags
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