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onsemi BZX85C11_T50A
- Part No.:
- BZX85C11_T50A
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZX85C11_T50A.pdf
- Description:
- DIODE ZENER 11V 1W DO41
- Quantity:
- Payment:
- Shipping:
Inventory:2,778
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Product details
Overview
BZX85C11_T50A from ON Semiconductor is a 11 V, ±5% tolerance, 1.0 W axial-leaded Zener diode in DO-41 glass package, rated for 20 Ω dynamic impedance at 5 mA test current and 0.5 μA maximum leakage at 8.4 V reverse voltage, used for precision voltage regulation and overvoltage protection in power supply feedback loops.
For engineers reviewing the BZX85C11_T50A datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance, power derating above 50°C, thermal resistance, cathode identification via color band, and compatibility with through-hole PCB assembly processes.
Technical Context
This device operates as a two-terminal silicon junction diode optimized for stable reverse-breakdown behavior under controlled DC bias. It maintains regulation across 1 mA to 150 mA operating current range with specified Zener impedance (20 Ω @ 5 mA) and low leakage (≤0.5 μA @ 8.4 V).
The DO-41 glass package provides hermetic sealing and thermal performance suitable for industrial ambient temperatures from −65°C to +200°C. Power dissipation is rated at 1.0 W at 25°C ambient, derating linearly by 6.67 mW/°C above 50°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 10.4 V min / 11.6 V max at IZ = 5 mA - defines regulated output voltage window under nominal test conditions |
| Tolerance | ±5% - ensures voltage accuracy within 0.55 V of nominal 11 V rating for closed-loop feedback stability |
| Zener Impedance (ZZ) | 20 Ω @ IZ = 5 mA - determines regulation stiffness and output ripple suppression capability |
| Power Dissipation (PD) | 1.0 W @ TA = 25°C - sets maximum continuous DC power handling before thermal shutdown risk |
| Leakage Current (IR) | ≤0.5 μA @ VR = 8.4 V - guarantees minimal parasitic current draw in standby or high-impedance sensing nodes |
| Operating Temperature | −65°C to +200°C - supports deployment in automotive engine compartments and industrial motor drives |
Pinout & Package
DO-41 glass axial package with cathode identified by a single color band on the body. Leads are tinned copper-clad steel, compatible with wave and hand soldering per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-voltage reference node | Connected to ground or lower-potential rail in shunt regulator configuration |
| Cathode | Zener breakdown terminal / regulated output node | Marked with color band; connects to input voltage source and load in parallel regulation topology |
Key Features
| Feature | Design Value |
|---|---|
| Stable Zener voltage | 11 V ±5% maintained across 1–150 mA operating range enables reliable setpoint control in analog feedback circuits |
| Low dynamic impedance | 20 Ω at 5 mA improves line and load regulation by minimizing output voltage shift under current transients |
| Hermetic glass package | DO-41 construction ensures long-term parameter stability and moisture resistance in harsh environments |
| Wide temperature range | −65°C to +200°C operation supports use in under-hood automotive and industrial power conversion systems |
Applications
| Voltage Reference for Op-Amp Circuits | Overvoltage Clamp in DC Power Supplies |
|---|---|
Use Scenario: Providing stable 11 V reference to instrumentation amplifier bias networks and ADC reference dividers. IC Role / Device Role / Timing Role: Passive voltage reference element establishing precise DC offset and gain-setting points. Use Value: ±5% tolerance and 20 Ω ZZ ensure reference drift remains below 0.1% over 10°C ambient change in lab-grade measurement systems. |
Use Scenario: Clamping transient surges on 12 V rail outputs of switching regulators during load dump events. IC Role / Device Role / Timing Role: Shunt protection device diverting excess energy to ground when input exceeds 11.6 V. Use Value: 1.0 W power rating allows absorption of 100 ms, 10 A surge pulses without degradation in telecom power modules. |
| Feedback Regulation in SMPS | ESD Protection for Low-Speed I/O Lines |
Use Scenario: Setting output voltage in flyback converter feedback loop via optocoupler-coupled error amplifier. IC Role / Device Role / Timing Role: Precision Zener element defining regulation threshold for TL431-type control ICs. Use Value: Tight 10.4–11.6 V window ensures ±1% output accuracy over full line/load range in 24 V industrial SMPS designs. |
Use Scenario: Protecting UART TX/RX pins against ±8 kV contact ESD per IEC 61000-4-2 Level 4. IC Role / Device Role / Timing Role: Bidirectional clamping diode (with series resistor) limiting pin voltage to safe levels. Use Value: 0.5 μA leakage at 8.4 V prevents signal distortion on high-impedance microcontroller GPIO lines. |
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%, 1.0 W, DO-41, ZZ = 20 Ω @ 25 mA | Higher test current shifts regulation point; less stable at low-current bias points | Select when higher Zener current simplifies bias network design in high-power supplies |
| BZX55C11 | 11 V nominal, ±5%, 500 mW, DO-35, ZZ = 25 Ω @ 5 mA | Lower power rating and smaller package limit surge handling and thermal margin | Prefer for space-constrained consumer electronics where 0.5 W suffices and board area is critical |
Compared with BZX85C11_T50A, the 1N4740A offers identical power but requires higher bias current for regulation, while the BZX55C11 reduces footprint at the cost of thermal robustness and surge immunity-making BZX85C11_T50A optimal for industrial-grade 1.0 W shunt regulation.
Availability
BZX85C11_T50A is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and test equipment requiring stable component supply with full traceability and long-lifecycle support.
Supply support for BZX85C11_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
ON Semiconductor is a global semiconductor manufacturer specializing in power management, analog, sensor, and logic devices for automotive, industrial, and cloud power applications.
The BZX85C11_T50A belongs to the BZX85C series of general-purpose Zener diodes designed for cost-effective, high-reliability voltage regulation and protection in high-volume industrial and automotive electronics.
FAQ
What is the Zener voltage tolerance for BZX85C11_T50A?
The BZX85C11_T50A has a guaranteed Zener voltage range of 10.4 V to 11.6 V at 5 mA test current, corresponding to a ±5% tolerance around the nominal 11 V rating. This tolerance is verified per ON Semiconductor's BZX85C3V3–BZX85C56 datasheet Rev. 2 (October 2017), and applies across the full operating temperature range of −65°C to +200°C.
How does BZX85C11_T50A handle thermal derating?
BZX85C11_T50A dissipates 1.0 W at 25°C ambient, with linear derating of 6.67 mW/°C above 50°C. At 100°C ambient, its usable power drops to 667 mW. This derating curve is defined in the Absolute Maximum Ratings table and must be applied in PCB layout with adequate copper pour and airflow for sustained operation.
Is BZX85C11_T50A suitable for ESD protection?
Yes, BZX85C11_T50A can serve as a low-cost ESD clamp for low-speed signals, leveraging its 0.5 μA leakage at 8.4 V and 11.6 V breakdown ceiling. However, it lacks specified IEC 61000-4-2 ratings; dedicated TVS diodes are preferred for certified ESD protection, while BZX85C11_T50A fits non-certified clamping in UART, I²C, or analog sensor interfaces.
What package type does BZX85C11_T50A use?
BZX85C11_T50A uses the DO-41 (JEDEC DO-204AL) axial glass package with cathode indicated by a single color band. Its physical dimensions include 2.03–2.72 mm body diameter, 4.06–5.20 mm body length, and 25.40 mm minimum lead length, confirmed in Figure 7 of the official ON Semiconductor datasheet.
Can BZX85C11_T50A replace BZX85C10 in existing designs?
BZX85C11_T50A is not a direct replacement for BZX85C10 due to its higher nominal Zener voltage (11 V vs. 10 V) and tighter 10.4–11.6 V range versus 9.4–10.6 V. Substitution may cause over-regulation in feedback circuits; verify loop stability and output accuracy before integration. The BZX85C11_T50A datasheet explicitly lists each variant as discrete voltage grade.
BZX85C11_T50A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 11 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 8 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 7.7 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-41
BZX85C11_T50A FAQ
1.How can I place an order for BZX85C11_T50A through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX85C11_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 BZX85C11_T50A reliable?
The price and inventory of BZX85C11_T50A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX85C11_T50A is usually 5 days.
3.What payment methods are accepted for BZX85C11_T50A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX85C11_T50A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX85C11_T50A?
BZX85C11_T50A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX85C11_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 BZX85C11_T50A?
For technical support, including BZX85C11_T50A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX85C11_T50A requirements.
6.How does Aetrix verify that BZX85C11_T50A is sourced from the original manufacturer or authorized distributors?
All BZX85C11_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 BZX85C11_T50A meets industry standards.
7.What is the process for return or replacement of BZX85C11_T50A?
All BZX85C11_T50A units undergo pre-shipment inspection (PSI). If there is an issue with BZX85C11_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 BZX85C11_T50A part is unused and in its original packaging.
Return procedure for BZX85C11_T50A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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