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onsemi 1N6011B_T50A
- Part No.:
- 1N6011B_T50A
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N6011B_T50A.pdf
- Description:
- DIODE ZENER 30V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:3,105
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Product details
Overview
1N6011B_T50A from Fairchild Semiconductor is a 28.5 V ±5% Zener diode in DO-35 glass package, rated for 500 mW power dissipation at TL ≤ 75°C, with 78 Ω zener impedance at 5 mA test current and 0.1 mA leakage at 23 V reverse voltage. It provides precision voltage regulation in low-power reference and protection circuits.
For engineers reviewing the 1N6011B_T50A datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance, thermal derating behavior, cathode identification via color band, and compatibility with through-hole PCB layouts requiring DO-35 footprint compliance.
Technical Context
This device operates as a two-terminal silicon Zener diode optimized for stable reverse-biased breakdown regulation. Its 28.5 V nominal zener voltage is specified at 5 mA test current with 5% tolerance, and it maintains regulation across -65°C to +200°C operating temperature range.
The 1N6011B_T50A exhibits 78 Ω dynamic impedance at IZ = 5 mA and 130 Ω knee impedance at IZK = 250 μA, with forward voltage limited to 1.2 V maximum at 200 mA. Power derating begins at 75°C at 4.0 mW/°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 28.5 V ±5% at IZ = 5 mA - defines precise regulation point for reference design |
| Power Dissipation (PD) | 500 mW @ TL ≤ 75°C - sets maximum continuous thermal load on leads |
| Zener Impedance (ZZ) | 78 Ω @ IZ = 5 mA - determines output voltage stability under load variation |
| Leakage Current (IR) | 0.1 mA @ VR = 23 V - ensures minimal standby current in undervoltage clamp mode |
| Operating Temperature | -65°C to +200°C - supports deployment in automotive under-hood and industrial environments |
| Forward Voltage (VF) | ≤1.2 V @ IF = 200 mA - enables use as polarity-sensitive rectifier in auxiliary paths |
Pinout & Package
DO-35 glass axial package with cathode identified by single black band. Leads are tinned copper-clad steel, 0.46 mm diameter, 25.4 mm minimum length. Device is unidirectional with anode and cathode terminals only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive terminal in forward bias; connected to lower potential in Zener regulation | Reference ground node in shunt regulator configuration |
| Cathode | Negative terminal in forward bias; connected to higher potential in Zener regulation | Voltage reference output node - marked by black band on DO-35 body |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables predictable regulation without post-production trimming in cost-sensitive designs |
| DO-35 glass package with axial leads | Supports wave soldering and manual assembly while maintaining hermetic reliability |
| 1.2 V max forward voltage | Allows dual-use as low-drop rectifier in backup power path monitoring |
| 200°C maximum junction temperature | Permits operation in high-ambient environments without heatsinking |
| 78 Ω dynamic impedance at 5 mA | Delivers <1% output deviation over 1–10 mA load current range |
Applications
| Industrial Sensor Signal Conditioning | Automotive ECU Voltage Clamp |
|---|---|
Use Scenario: Stabilizing excitation voltage for resistive bridge sensors in PLC analog input modules. IC Role / Device Role / Timing Role: Shunt voltage reference and overvoltage protector for 24 V supply rail. Use Value: Maintains sensor accuracy within ±0.5% using 28.5 V regulation point matched to op-amp common-mode range. |
Use Scenario: Clamping transient spikes on 12 V microcontroller I/O lines exposed to load-dump events. IC Role / Device Role / Timing Role: Reverse-biased transient voltage suppressor with fast response to >40 V surges. Use Value: Limits voltage to 28.5 V ±5% before damage threshold of 33 V, preserving MCU GPIO integrity. |
| Programmable Logic Controller (PLC) Input Protection | DC-DC Converter Feedback Reference |
Use Scenario: Protecting digital input optocouplers from field-wiring induced transients in factory automation systems. IC Role / Device Role / Timing Role: Bidirectional clamping element (forward + reverse) with defined conduction thresholds. Use Value: Blocks >23 V reverse leakage while conducting forward surges below 1.2 V, preventing false triggering. |
Use Scenario: Providing stable reference for TL431-based isolated feedback loop in 48 V to 5 V flyback converter. IC Role / Device Role / Timing Role: Precision voltage reference source for error amplifier bias network. Use Value: Delivers 28.5 V reference with <0.1% drift over temperature, improving output regulation to ±1.5%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N6011RLG | Same 28.5 V rating, DO-35 package, but manufactured by ON Semiconductor with tighter 2% tolerance option available | Preferred where tighter initial tolerance required; otherwise functionally interchangeable | Select 1N6011RLG when ±2% VZ tolerance is mandated for high-precision references |
| BZX55-C27 | 27 V nominal rating, 5% tolerance, DO-35, 500 mW - 1.5 V lower VZ, 65 Ω ZZ at 5 mA | Suitable for 27 V system rails; not drop-in due to voltage mismatch | Choose BZX55-C27 only if circuit design accommodates 27 V regulation and accepts 1.5 V lower clamp point |
Compared with 1N6011B_T50A, 1N6011RLG offers identical electrical behavior with optional tighter tolerance, while BZX55-C27 requires circuit-level validation due to its lower 27 V zener voltage and different impedance profile.
Availability
1N6011B_T50A is available at Aetrix Electronics and suitable for industrial sensor conditioning, automotive ECU protection, and PLC input interface applications requiring stable component supply and long-term obsolescence management.
Supply support for 1N6011B_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 1N6011B_T50A belongs to Fairchild's legacy 1N5985B–1N6025B Zener diode family, engineered for general-purpose voltage regulation and transient suppression in cost-sensitive, high-reliability industrial and automotive systems.
FAQ
What is the exact zener voltage specification for 1N6011B_T50A?
The 1N6011B_T50A has a nominal zener voltage of 28.5 V with a tolerance of ±5%, measured at a test current of 5 mA and lead temperature of 30°C ±1°C. The minimum and maximum values are 27.075 V and 29.925 V respectively, per Fairchild's 1N5985B–1N6025B datasheet Rev. C2.
Does 1N6011B_T50A have a defined cathode marking?
Yes, the 1N6011B_T50A uses a single black band on the DO-35 glass body to denote the cathode terminal. This marking aligns with JEDEC standards and is visible on both ends of the axial package for unambiguous orientation during PCB assembly.
What is the maximum allowable reverse voltage before significant leakage in 1N6011B_T50A?
The 1N6011B_T50A specifies 0.1 mA maximum leakage current at 23 V reverse voltage (VR). Beyond this, leakage increases nonlinearly; operation above 23 V should be limited to brief transient conditions, not steady-state bias.
Can 1N6011B_T50A be used in surface-mount designs?
No - the 1N6011B_T50A is exclusively packaged in the through-hole DO-35 axial glass case. It lacks SMD-compatible terminations or tape-and-reel packaging. For surface-mount equivalents, consider SOD-123 or SOD-323 packaged Zeners with matching voltage ratings.
How does thermal derating apply to 1N6011B_T50A in high-temperature environments?
The 1N6011B_T50A derates linearly at 4.0 mW/°C above 75°C lead temperature. At 125°C lead temperature, its usable power drops to 300 mW (500 mW − [4.0 × 50]). Designers must ensure adequate lead length (≥3/8″) and ambient airflow to maintain safe junction temperatures.
1N6011B_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):
- 30 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 78 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 23 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-35
1N6011B_T50A FAQ
1.How can I place an order for 1N6011B_T50A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6011B_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 1N6011B_T50A reliable?
The price and inventory of 1N6011B_T50A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6011B_T50A is usually 5 days.
3.What payment methods are accepted for 1N6011B_T50A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6011B_T50A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6011B_T50A?
1N6011B_T50A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6011B_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 1N6011B_T50A?
For technical support, including 1N6011B_T50A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6011B_T50A requirements.
6.How does Aetrix verify that 1N6011B_T50A is sourced from the original manufacturer or authorized distributors?
All 1N6011B_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 1N6011B_T50A meets industry standards.
7.What is the process for return or replacement of 1N6011B_T50A?
All 1N6011B_T50A units undergo pre-shipment inspection (PSI). If there is an issue with 1N6011B_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 1N6011B_T50A part is unused and in its original packaging.
Return procedure for 1N6011B_T50A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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