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onsemi BZX55C11_T50R
- Part No.:
- BZX55C11_T50R
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
BZX55C11_T50R.pdf
- Description:
- DIODE ZENER 11V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:6,340
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Product details
Overview
BZX55C11_T50R from Fairchild Semiconductor is a 11 V, ±5% tolerance Zener diode in DO-35 glass package, rated for 500 mW power dissipation at TL ≤ 75°C, with 20 Ω dynamic impedance at 5 mA test current and 0.1 μA maximum reverse leakage at 8.5 V. It serves as a precision voltage reference or overvoltage clamp in low-power analog and power supply feedback circuits.
For engineers reviewing the BZX55C11_T50R datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance, thermal derating behavior, cathode identification via color band, junction temperature range (–65°C to +200°C), and compatibility with through-hole PCB layouts requiring DO-35 footprint.
Technical Context
The BZX55C11_T50R operates as a silicon planar Zener diode with sharp reverse breakdown characteristics, designed for stable voltage regulation under DC bias conditions. Its 11 V nominal zener voltage is specified at 5 mA test current, with 20 Ω dynamic impedance indicating moderate regulation sensitivity to current variation.
Thermal performance is defined by a 4.0 mW/°C derating slope above 75°C lead temperature, and the device supports operation across –65°C to +200°C junction and storage temperature range-enabling use in industrial and automotive ambient environments where thermal cycling is present.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 10.4 V min / 11.6 V max at IZ = 5 mA - defines usable regulation window for feedback or clamping |
| Tolerance | ±5% - ensures predictable voltage setpoint without post-calibration in cost-sensitive designs |
| Power Dissipation (PD) | 500 mW @ TL ≤ 75°C - sets maximum continuous DC power handling before thermal derating applies |
| Dynamic Impedance (ZZ) | 20 Ω @ IZ = 5 mA - determines output voltage deviation under load current changes |
| Reverse Leakage (IR) | ≤0.1 μA @ VR = 8.5 V - confirms low standby current in high-impedance sensing nodes |
| Junction Temp Range | –65°C to +200°C - supports deployment in under-hood or industrial control enclosures |
Pinout & Package
DO-35 glass axial package with cathode identified by a single color band; no active terminals beyond anode and cathode - standard two-terminal passive configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower potential side in reverse-biased Zener operation; carries forward current up to 100 mA (VF ≤ 1.3 V) |
| Cathode | Zener breakdown terminal | Marked with color band; connected to higher potential side during regulation; defines polarity for correct circuit orientation |
Key Features
| Feature | Design Value |
|---|---|
| Stable 11 V reference | Guaranteed 10.4–11.6 V range at 5 mA enables repeatable threshold setting in comparator or regulator circuits |
| Low leakage current | 0.1 μA max at 8.5 V minimizes error in high-resistance divider networks used for voltage sensing |
| DO-35 mechanical standardization | Industry-standard axial glass package ensures compatibility with legacy through-hole assembly and rework tooling |
| Wide temperature operation | –65°C to +200°C rating allows use in extended-environment applications without derating penalties below 75°C |
Applications
| Power Supply Feedback | Overvoltage Clamp |
|---|---|
Use Scenario: Regulating output voltage in linear or switching power supplies using optocoupler-coupled feedback loops. IC Role / Device Role / Timing Role: Zener reference element providing precise 11 V threshold to drive optocoupler LED or error amplifier input. Use Value: Maintains ±5% output accuracy across line/load variations due to tight VZ tolerance and low ZZ. | Use Scenario: Protecting microcontroller I/O pins or sensor inputs from transient overvoltage events. IC Role / Device Role / Timing Role: Shunt clamping device that conducts above 11.6 V to limit voltage excursion on protected node. Use Value: Limits peak voltage to ≤11.6 V while dissipating up to 500 mW, preventing latch-up or damage to downstream CMOS inputs. |
| Voltage Reference | Current Source Bias |
Use Scenario: Generating stable bias voltages for op-amp comparators or ADC reference dividers in instrumentation circuits. IC Role / Device Role / Timing Role: Precision DC reference source with minimal temperature drift and low noise contribution. Use Value: Delivers 11 V ±5% with 20 Ω ZZ, enabling <1% total error in 12-bit measurement systems at room temperature. | Use Scenario: Setting constant current for LED drivers or transistor bias networks via series resistor + Zener configuration. IC Role / Device Role / Timing Role: Voltage-controlled current limiter defining IOUT = (VZ − VBE)/RSET in simple current mirror topologies. Use Value: Enables predictable 10–12 mA current sources with <5% setpoint error and thermal stability up to +125°C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4740A | 10 V nominal, ±5%, DO-41 package, 1.0 W rating | Higher power handling but larger footprint; less suitable for space-constrained DO-35 layouts | Select when >500 mW dissipation is required and board area permits DO-41 |
| BZX55C10 | 10 V nominal, same DO-35 package, 15 Ω ZZ, 0.1 μA IR | Narrower regulation window; preferred where 10 V threshold is system-defined | Choose for 10 V reference needs with identical thermal and mechanical behavior |
Compared with 1N4740A and BZX55C10, the BZX55C11_T50R offers a unique 11 V setpoint in the DO-35 form factor with optimized 20 Ω impedance for mid-range current regulation-making it ideal for compact feedback networks where 10 V or 12 V variants fail to meet exact voltage requirements.
Availability
BZX55C11_T50R is available at Aetrix Electronics and suitable for power supply feedback, overvoltage protection, and precision voltage reference applications requiring stable component supply across industrial, automotive, and consumer electronics production programs.
Supply support for BZX55C11_T50R 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 BZX55C series was developed as a general-purpose, cost-optimized Zener diode family targeting voltage regulation and clamping in low-to-medium power analog circuits.
FAQ
What is the nominal zener voltage of BZX55C11_T50R?
The BZX55C11_T50R has a nominal zener voltage of 11 V, with a guaranteed range of 10.4 V to 11.6 V at 5 mA test current and 25°C ambient. This tolerance band reflects the ±5% specification defined in the Fairchild datasheet Rev. D1, and the value remains valid under thermal equilibrium conditions with 3/8" lead length.
What package type does BZX55C11_T50R use?
BZX55C11_T50R uses the DO-35 glass axial package, identifiable by a cathode color band and standardized lead spacing. This package supports through-hole mounting and is consistent across the BZX55C2V4–BZX55C56 family, enabling drop-in replacement within the same voltage grade and tolerance class.
What is the maximum power dissipation for BZX55C11_T50R?
BZX55C11_T50R is rated for 500 mW power dissipation at lead temperature (TL) ≤ 75°C. Above this temperature, power must be linearly derated at 4.0 mW/°C, reaching zero dissipation at approximately 200°C lead temperature-aligning with its maximum junction temperature rating.
How is cathode polarity marked on BZX55C11_T50R?
The cathode of BZX55C11_T50R is marked by a single color band on the DO-35 glass body, per industry standard and Fairchild's marking specification. This band must be oriented toward the higher-potential node in reverse-bias Zener operation to ensure proper voltage regulation or clamping function.
What is the dynamic impedance of BZX55C11_T50R at its test current?
The dynamic impedance (ZZ) of BZX55C11_T50R is 20 Ω, measured at the 5 mA zener test current and 25°C. This value quantifies how much the output voltage changes per unit change in current, directly affecting regulation accuracy in variable-load applications such as feedback loops or reference dividers.
BZX55C11_T50R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 11 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 20 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 8.5 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
BZX55C11_T50R FAQ
1.How can I place an order for BZX55C11_T50R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX55C11_T50R 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 BZX55C11_T50R reliable?
The price and inventory of BZX55C11_T50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX55C11_T50R is usually 5 days.
3.What payment methods are accepted for BZX55C11_T50R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX55C11_T50R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX55C11_T50R?
BZX55C11_T50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX55C11_T50R 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 BZX55C11_T50R?
For technical support, including BZX55C11_T50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX55C11_T50R requirements.
6.How does Aetrix verify that BZX55C11_T50R is sourced from the original manufacturer or authorized distributors?
All BZX55C11_T50R 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 BZX55C11_T50R meets industry standards.
7.What is the process for return or replacement of BZX55C11_T50R?
All BZX55C11_T50R units undergo pre-shipment inspection (PSI). If there is an issue with BZX55C11_T50R, 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 BZX55C11_T50R part is unused and in its original packaging.
Return procedure for BZX55C11_T50R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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