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onsemi BZX79C11_T50R
- Part No.:
- BZX79C11_T50R
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
BZX79C11_T50R.pdf
- Description:
- DIODE ZENER 11V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:4,737
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Product details
Overview
BZX79C11_T50R from ON Semiconductor is a 11 V, 5% tolerance, 500 mW DO-35 glass-encapsulated Zener diode optimized for voltage regulation and reference applications in low-power analog circuits, power supply feedback loops, and overvoltage protection. It delivers stable Zener voltage at 5 mA test current, exhibits 8 Ω dynamic impedance, and supports operation from –65°C to +200°C.
For engineers reviewing the BZX79C11_T50R datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±5%), thermal coefficient (+5.4 mV/°C), leakage current (≤0.1 μA at 8.5 V), and DO-35 package compatibility with through-hole PCB assembly.
Technical Context
The BZX79C11_T50R operates as a two-terminal silicon Zener diode with reverse-biased breakdown regulation. Its 11 V nominal Zener voltage is specified at IZ = 5 mA, with dynamic impedance of 8 Ω and temperature coefficient of +5.4 mV/°C - indicating positive drift with rising junction temperature.
It adheres to the BZX79C2V4–BZX79C56 family design, using planar epitaxial construction in a DO-35 glass package with cathode band marking. Maximum power dissipation is 500 mW at TL ≤ 75°C, derating linearly by 4.0 mW/°C above that temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 10.4 V to 11.6 V at IZ = 5 mA - defines regulation window for precision reference use |
| Power Dissipation (PD) | 500 mW @ TL ≤ 75°C - sets maximum continuous DC power handling in standard lead-mount condition |
| Dynamic Impedance (ZZ) | 8 Ω max @ IZ = 5 mA - determines output voltage stability under load current variation |
| Leakage Current (IR) | ≤0.1 μA @ VR = 8.5 V - ensures minimal error current in high-impedance bias networks |
| Temperature Coefficient (TC) | +5.4 mV/°C - quantifies Zener voltage drift per degree Celsius rise in junction temperature |
| Operating Temperature | –65°C to +200°C - enables deployment in automotive under-hood, industrial, and aerospace environments |
Pinout & Package
DO-35 glass axial package with cathode indicated by a single color band on the body. Leads are tinned copper-clad steel, suitable for wave or hand soldering. Package dimensions conform to JEDEC DO-35 standard: overall length ≈ 4.2 mm, body diameter ≈ 1.8 mm, lead diameter ≈ 0.45 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground node | Connected to circuit ground or lower-potential node when used in reverse-bias regulation |
| Cathode | Zener breakdown terminal / voltage reference output | Provides regulated 11 V output relative to anode; marked by color band on DO-35 body |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables predictable regulation without post-production trimming in cost-sensitive consumer and industrial designs |
| Low leakage current (≤0.1 μA) | Minimizes error in high-resistance voltage divider or sensor bias networks |
| Stable +5.4 mV/°C TC | Allows accurate temperature-compensated reference design when paired with negative-TC components |
| DO-35 glass package | Provides hermetic sealing, high reliability, and compatibility with legacy through-hole manufacturing |
Applications
| Power Supply Feedback | Overvoltage Clamp |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback or buck-derived DC-DC converters via optocoupler feedback loop. IC Role / Device Role / Timing Role: Zener reference element setting upper threshold for TL431 or optocoupler LED drive current. Use Value: Tight 10.4–11.6 V range ensures ±1% output regulation accuracy across line/load conditions. | Use Scenario: Protecting microcontroller I/O pins or ADC inputs from transient overvoltage events. IC Role / Device Role / Timing Role: Shunt clamping device diverting excess energy to ground before damage threshold is reached. Use Value: 0.1 μA leakage preserves signal integrity in high-impedance sensing paths; DO-35 form factor fits compact PCB layouts. |
| Voltage Reference | Current Source Bias |
Use Scenario: Providing stable bias for op-amp comparators, analog switches, or sensor excitation circuits. IC Role / Device Role / Timing Role: Precision DC reference node in low-power analog subsystems requiring <1% absolute accuracy. Use Value: +5.4 mV/°C TC allows predictable drift compensation; 8 Ω ZZ maintains regulation under 100 μA load variation. | Use Scenario: Setting constant current for LED drivers or transistor bias networks using resistor-Zener configuration. IC Role / Device Role / Timing Role: Voltage-setting element establishing base-emitter or gate-source potential in discrete current sources. Use Value: 500 mW rating supports up to ~45 mA source current with 1 kΩ series resistor at 15 V input. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4740A | 10 V nominal, ±5%, 1 W power rating, DO-41 package | Higher power handling but larger footprint; less suitable for space-constrained boards | Select when >500 mW dissipation or higher surge robustness is required |
| BZX55C11 | 11 V nominal, ±5%, 500 mW, DO-35 package, but higher ZZ (15 Ω) and wider leakage spec (≤0.5 μA) | Lower regulation precision and higher noise floor in sensitive references | Acceptable for non-critical clamping where tighter ZZ is not required |
Compared with 1N4740A and BZX55C11, the BZX79C11_T50R offers superior regulation precision (8 Ω ZZ, 0.1 μA leakage) in the industry-standard DO-35 footprint - making it optimal for compact, low-noise, and thermally stable voltage reference designs.
Availability
BZX79C11_T50R is available at Aetrix Electronics and suitable for power supply feedback, overvoltage clamp, and voltage reference applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for BZX79C11_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
ON Semiconductor is a global semiconductor manufacturer specializing in energy-efficient power management, analog, and logic solutions for automotive, industrial, and consumer markets.
The BZX79C11_T50R belongs to the BZX79C2V4–BZX79C56 Zener diode family, engineered for reliable voltage regulation and reference functions in cost-sensitive, high-volume applications with demanding thermal and longevity requirements.
FAQ
What is the Zener voltage tolerance of BZX79C11_T50R?
The BZX79C11_T50R has a Zener voltage tolerance of ±5%, meaning its rated breakdown voltage falls between 10.4 V and 11.6 V when measured at IZ = 5 mA and TA = 25°C. This tolerance is guaranteed per ON Semiconductor's datasheet revision 3 (November 2017) and applies to all units shipped under this part number.
Does BZX79C11_T50R have a specified forward voltage?
Yes, the BZX79C11_T50R has a maximum forward voltage (VF) of 1.5 V at forward current (IF) = 100 mA, as documented in the "Electrical Characteristics" section of the official ON Semiconductor datasheet. This parameter is relevant when the device is used in forward-conduction mode, such as in polarity protection or ESD clamping configurations.
What is the thermal coefficient of BZX79C11_T50R and how does it affect circuit performance?
The BZX79C11_T50R has a temperature coefficient of +5.4 mV/°C, indicating its Zener voltage increases linearly with junction temperature. In precision reference applications, this drift must be accounted for in system-level calibration or compensated using complementary components - for example, pairing with a negative-TC thermistor or diode in the same thermal zone.
Is BZX79C11_T50R compatible with lead-free soldering processes?
Yes, the BZX79C11_T50R's DO-35 glass package and tinned copper-clad steel leads are qualified for standard lead-free reflow and wave soldering profiles, including peak temperatures up to 260°C for ≤10 seconds. The device meets J-STD-020 moisture sensitivity level (MSL) 1, requiring no pre-bake prior to assembly.
Can BZX79C11_T50R replace BZX79C10 or BZX79C12 in existing designs?
No direct substitution is recommended without circuit validation. While BZX79C11_T50R shares the same DO-35 package and 500 mW rating with BZX79C10 and BZX79C12, its 11 V Zener voltage differs by ±1 V - which may shift regulation thresholds, feedback gain, or clamping levels beyond acceptable margins in precision circuits. Always verify loop stability and worst-case voltage margins before interchange.
BZX79C11_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 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 100 mA
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-35
BZX79C11_T50R FAQ
1.How can I place an order for BZX79C11_T50R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX79C11_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 BZX79C11_T50R reliable?
The price and inventory of BZX79C11_T50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX79C11_T50R is usually 5 days.
3.What payment methods are accepted for BZX79C11_T50R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX79C11_T50R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX79C11_T50R?
BZX79C11_T50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX79C11_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 BZX79C11_T50R?
For technical support, including BZX79C11_T50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX79C11_T50R requirements.
6.How does Aetrix verify that BZX79C11_T50R is sourced from the original manufacturer or authorized distributors?
All BZX79C11_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 BZX79C11_T50R meets industry standards.
7.What is the process for return or replacement of BZX79C11_T50R?
All BZX79C11_T50R units undergo pre-shipment inspection (PSI). If there is an issue with BZX79C11_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 BZX79C11_T50R part is unused and in its original packaging.
Return procedure for BZX79C11_T50R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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