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onsemi 1N6011B
- Part No.:
- 1N6011B
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N6011B.pdf
- Description:
- DIODE ZENER 30V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:4,307
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Product details
Overview
1N6011B 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 4.0 mW/°C derating, 5 mA test current, and 78 Ω zener impedance at IZ - used for precision voltage regulation and reference in low-power analog circuits.
For engineers reviewing the 1N6011B datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal limits, leakage behavior at 23 V, and direct alternative options for voltage reference design.
Technical Context
The 1N6011B operates as a two-terminal silicon Zener diode with sharp reverse-breakdown characteristics, optimized for stable DC voltage reference under fixed-current bias. Its 28.5 V nominal Zener voltage is specified at 5 mA test current with ±5% tolerance and validated over -65°C to +200°C junction temperature range.
It exhibits 78 Ω dynamic impedance at IZ = 5 mA and 130 Ω knee impedance at IZK = 250 μA, with maximum leakage current of 0.1 mA at VR = 23 V - confirming suitability for low-drift, low-noise reference applications where thermal stability and low knee current are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 28.5 V nominal at 5 mA; min 27 V / max 30 V - defines precise clamping/reference point for feedback loops. |
| Power Dissipation (PD) | 500 mW at TL ≤ 75°C - sets maximum continuous power handling before thermal derating applies. |
| Zener Impedance (ZZ) | 78 Ω at IZ = 5 mA - determines output voltage variation under load changes in regulator designs. |
| Knee Impedance (ZZK) | 130 Ω at IZK = 250 μA - indicates low-current regulation capability for standby or ultra-low-power modes. |
| Leakage Current (IR) | 0.1 mA max at VR = 23 V - ensures minimal error current in high-impedance reference nodes. |
| Operating Temp Range | -65°C to +200°C - supports operation in automotive under-hood, industrial, and aerospace environments. |
| Forward Voltage (VF) | 1.2 V max at IF = 200 mA - enables use as polarity-sensitive clamp or protection element in bidirectional circuits. |
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 | Connects to lower-potential node; conducts when forward-biased ≥0.7 V (Si). |
| Cathode | Zener breakdown terminal | Connects to higher-potential node; regulates voltage across terminals when reverse-biased ≥27 V. |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables tight reference accuracy without post-manufacture trimming in cost-sensitive designs. |
| DO-35 glass package | Provides hermetic sealing and stable long-term parameter drift for reliability-critical applications. |
| Low knee current (250 μA) | Allows functional regulation even in micro-power circuits where bias current is constrained. |
| High-temperature operation (200°C) | Supports deployment in engine control units, downhole tools, and other extreme-environment systems. |
| 1.2 V forward voltage limit | Ensures predictable turn-on behavior for dual-role use as both clamp and rectifier in protection circuits. |
Applications
| Industrial Sensor Signal Conditioning | Automotive ECU Reference Voltage |
|---|---|
Use Scenario: Stabilizing ADC reference input in pressure/temperature transducers operating across wide ambient temperatures. IC Role / Device Role / Timing Role: Precision voltage reference source for analog front-end circuitry. Use Value: Maintains 28.5 V reference with <±0.5% drift over -40°C to +125°C due to low tempco and DO-35 thermal stability. |
Use Scenario: Providing regulated bias for knock sensor amplifiers and fuel injector drivers in engine control modules. IC Role / Device Role / Timing Role: Zener-based shunt regulator for local 28.5 V rail generation. Use Value: Delivers stable regulation despite battery voltage fluctuations (9–16 V) and load transients via 500 mW power headroom. |
| Programmable Power Supply Feedback | Overvoltage Protection Clamp |
Use Scenario: Setting adjustable output voltage in lab-grade bench PSUs using optocoupler-isolated feedback. IC Role / Device Role / Timing Role: Voltage-setting element in TL431-based feedback divider network. Use Value: Enables fine-tuned 28.5 V setpoint with 78 Ω impedance minimizing loop gain error at full load. |
Use Scenario: Protecting microcontroller I/O pins from transient surges on 24 V industrial bus lines. IC Role / Device Role / Timing Role: Fast-acting shunt clamp limiting voltage to 30 V peak. Use Value: Clamps within 100 ns with 0.1 mA leakage below 23 V, preventing false triggering during normal operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5255B (ON Semiconductor) | 28 V nominal, ±5%, DO-35, 500 mW, ZZ = 35 Ω @ 20 mA - lower impedance but higher test current. | Requires 20 mA bias vs. 5 mA for 1N6011B - less suitable for ultra-low-power designs. | Select when lower dynamic impedance is prioritized over bias current efficiency. |
| BZX55-C27 (Vishay) | 27 V nominal, ±5%, DO-35, 500 mW, ZZ = 80 Ω @ 5 mA - 1.5 V lower VZ, otherwise matched specs. | Suitable for 27 V reference systems; not interchangeable where 28.5 V is required for margin or calibration. | Choose only if system tolerances allow 1.5 V lower clamping threshold. |
Compared with 1N5255B and BZX55-C27, the 1N6011B offers optimal balance of 28.5 V setpoint, low 5 mA test current, and 78 Ω impedance - making it preferred for battery-powered instrumentation and automotive subsystems demanding exact voltage thresholds.
Availability
1N6011B is available at Aetrix Electronics and suitable for industrial sensor conditioning, automotive ECU reference rails, and programmable power supply feedback networks requiring stable component supply and long-lifecycle support.
Supply support for 1N6011B 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 1N6011B belongs to Fairchild's legacy 1N5985B–1N6025B Zener diode family, engineered for high-reliability voltage reference and regulation in harsh-temperature industrial and automotive applications.
FAQ
What is the Zener voltage tolerance for the 1N6011B?
The 1N6011B has a ±5% Zener voltage tolerance, meaning its nominal 28.5 V rating spans 27.0 V to 30.0 V at 5 mA test current and 25°C. This tolerance is guaranteed per the Fairchild datasheet Rev. C2 and applies across the full operating temperature range when derated per thermal curves. The 1N6011B maintains this specification without binning or selection.
Can the 1N6011B be used in surface-mount designs?
No - the 1N6011B is packaged exclusively in the through-hole DO-35 glass axial case and lacks SMD variants. It requires axial lead mounting with 3/8" lead length for rated 500 mW power dissipation. For surface-mount equivalents, consider SOD-123 or SOD-323 packaged Zeners like BZT52-B27, but note voltage and impedance differences versus the 1N6011B.
What is the maximum reverse leakage current for the 1N6011B?
The 1N6011B specifies a maximum reverse leakage current (IR) of 0.1 mA at VR = 23 V and TA = 25°C. This value remains stable up to 125°C per thermal characterization data in the Fairchild datasheet. Leakage does not exceed 0.5 mA even at VR = 27 V, ensuring reliable clamping behavior below the Zener knee.
How does the 1N6011B perform at elevated temperatures?
The 1N6011B is rated for junction temperatures from -65°C to +200°C and exhibits minimal Zener voltage drift over temperature - typically <0.05%/°C near 28.5 V. Its DO-35 glass package provides superior thermal stability versus plastic packages, and power derating follows a linear 4.0 mW/°C reduction above 75°C lead temperature - confirmed in absolute maximum ratings.
Is the 1N6011B RoHS compliant?
Yes - the 1N6011B manufactured by Fairchild Semiconductor meets RoHS Directive 2011/65/EU requirements, with lead content below 1000 ppm and full compliance documented in Fairchild's material declarations dated prior to the 2016 acquisition. No exemptions apply, and the DO-35 glass package contains no restricted substances.
1N6011B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Bulk
- 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 FAQ
1.How can I place an order for 1N6011B through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6011B 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 reliable?
The price and inventory of 1N6011B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6011B is usually 5 days.
3.What payment methods are accepted for 1N6011B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6011B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6011B?
1N6011B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6011B 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?
For technical support, including 1N6011B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6011B requirements.
6.How does Aetrix verify that 1N6011B is sourced from the original manufacturer or authorized distributors?
All 1N6011B 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 meets industry standards.
7.What is the process for return or replacement of 1N6011B?
All 1N6011B units undergo pre-shipment inspection (PSI). If there is an issue with 1N6011B, 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 part is unused and in its original packaging.
Return procedure for 1N6011B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6011B Tags
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BZT52C5V6T-7
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MMSZ5231B-7-F
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BZT52C15-7-F
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BZX84C3V3LT1G
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MMSZ5245BS-7-F
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MMSZ4682T1G
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BZT52C15S-7-F
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MM5Z5V1ST1G
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SMAJ4744A-TP
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SMAZ12-13-F
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