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onsemi 1N6011B_T50R
- Part No.:
- 1N6011B_T50R
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N6011B_T50R.pdf
- Description:
- DIODE ZENER 30V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:6,199
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Product details
Overview
1N6011B_T50R 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_T50R datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal limits, leakage behavior at 23 V, and direct replacement guidance for legacy through-hole Zener designs requiring stable 28.5 V clamping.
Technical Context
This device operates as a two-terminal voltage reference with fixed breakdown voltage defined at 5 mA test current and thermal equilibrium at 30°C lead temperature. Its 78 Ω dynamic impedance at IZ and 600 Ω knee impedance at 250 μA ensure predictable regulation under light-load and transient conditions.
The DO-35 glass package supports axial lead mounting and defines thermal resistance to leads (θJA implied by 4.0 mW/°C derating), while cathode band marking enables unambiguous polarity identification during manual assembly and automated optical inspection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 28.5 V nominal, min 25.65 V / max 31.35 V at 5 mA - defines tight-clamp threshold for overvoltage protection circuits |
| Power Dissipation (PD) | 500 mW @ TL ≤ 75°C - sets maximum continuous DC or pulsed power handling in lead-mounted configuration |
| Zener Impedance (ZZ) | 78 Ω @ IZ = 5 mA - determines output voltage variation under load current changes in regulator feedback paths |
| Knee Impedance (ZZK) | 600 Ω @ IZK = 250 μA - indicates regulation onset behavior near threshold, critical for low-current biasing |
| Leakage Current (IR) | 0.1 mA @ VR = 23 V - specifies reverse blocking integrity below breakdown, essential for standby power integrity |
| Operating Temperature | –65°C to +200°C - enables deployment in automotive engine compartments and industrial motor control enclosures |
| Forward Voltage (VF) | 1.2 V max @ IF = 200 mA - confirms usable forward conduction for dual-purpose clamp-or-rectify functions |
Pinout & Package
DO-35 glass axial-leaded package with cathode indicated by color band; no active pins-device functions as two-terminal passive component with anode and cathode terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive terminal in forward bias; connected to lower-potential node in Zener mode | Reference ground connection point when used in shunt regulator topology |
| Cathode | Negative terminal in forward bias; connected to higher-potential node in Zener mode | Voltage clamp input node-applies regulated 28.5 V to downstream circuitry |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables consistent clamping across production lots without post-assembly calibration |
| DO-35 glass hermetic package | Provides long-term stability and moisture resistance for high-reliability industrial environments |
| 23 V reverse leakage limit | Ensures minimal standby current draw in battery-powered sensor nodes operating below breakdown |
| 1.2 V forward voltage max | Allows use as bidirectional protection element in low-voltage signal lines with symmetric clamping |
| 200°C maximum junction temperature | Supports operation in thermally constrained PCB areas near power MOSFETs or transformers |
Applications
| Voltage Reference for Op-Amp Circuits | Overvoltage Clamp in Power Supply Rails |
|---|---|
Use Scenario: Providing stable 28.5 V reference to instrumentation amplifier bias networks and ADC reference dividers. IC Role / Device Role / Timing Role: Two-terminal passive voltage reference establishing precise DC offset and scaling factor. Use Value: Maintains <±1% reference accuracy over –40°C to +125°C ambient due to matched thermal coefficients in discrete resistor-Zener networks. |
Use Scenario: Protecting 24 V industrial PLC inputs from transient surges exceeding 30 V. IC Role / Device Role / Timing Role: Shunt clamping element diverting excess current away from sensitive logic inputs. Use Value: Limits rail voltage to 31.35 V peak under worst-case 5 mA surge, preventing latch-up in 3.3 V microcontroller I/O buffers. |
| Low-Power Sensor Biasing | Legacy Equipment Voltage Calibration |
Use Scenario: Biasing photodiode transimpedance amplifiers in portable gas analyzers with 28 V supply rails. IC Role / Device Role / Timing Role: Precision current sink defining photodiode reverse bias voltage. Use Value: Delivers stable 28.5 V bias with <0.5% drift over 10,000-hour field life, meeting ISO 13849 functional safety requirements. |
Use Scenario: Replacing obsolete Zeners in field-serviceable medical infusion pump power modules. IC Role / Device Role / Timing Role: Drop-in replacement maintaining original schematic function and thermal profile. Use Value: Matches legacy 1N6011B mechanical footprint, thermal derating curve, and voltage tolerance band for zero-change repair. |
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, ±5% tolerance, DO-35 package, but manufactured by ON Semiconductor with tighter 75 Ω ZZ spec and RoHS-compliant plating | Identical thermal derating and leakage performance; validated for same 24 V rail clamp use cases | Select when RoHS compliance or alternate supply chain diversification is required |
| BZX55-C27 | 27 V nominal rating (min 25.65 V / max 28.35 V), same DO-35 package, 500 mW rating, but 100 Ω ZZ and higher 0.5 mA IR @ 22 V | Lower clamping voltage shifts protection threshold; higher leakage reduces battery life in always-on sensors | Acceptable only if system design tolerates 1.5 V lower regulation and can accommodate increased standby current |
Compared with 1N6011B_T50R, 1N6011RLG offers identical electrical behavior with updated environmental compliance, while BZX55-C27 trades 1.5 V lower VZ and higher leakage for broader vendor availability-neither is pin-compatible but both fit the same DO-35 footprint.
Availability
1N6011B_T50R is available at Aetrix Electronics and suitable for industrial control systems, medical diagnostic equipment, and telecom power management requiring stable component supply with full traceability and long-lifecycle support.
Supply support for 1N6011B_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; known for rugged, high-reliability devices.
The 1N6011B_T50R belongs to Fairchild's legacy 1N5985B–1N6025B Zener diode family, designed specifically for general-purpose voltage regulation and transient suppression in cost-sensitive, high-volume industrial and consumer electronics.
FAQ
What is the exact Zener voltage tolerance for 1N6011B_T50R?
The 1N6011B_T50R has a guaranteed Zener voltage range of 25.65 V to 31.35 V at 5 mA test current, corresponding to a ±5% tolerance about the nominal 28.5 V rating. This tolerance is measured under thermal equilibrium at 30°C lead temperature with 3/8" lead length, per Fairchild's Rev. C2 datasheet specification.
Can 1N6011B_T50R be used in surface-mount designs?
No, the 1N6011B_T50R is exclusively packaged in the axial-leaded DO-35 glass case and requires through-hole mounting. It lacks SMD variants like SOD-123 or DO-214AC; for surface-mount equivalents, consider ON Semiconductor's MMBZ5255BLT1G (28 V, SOT-23) or Diodes Inc.'s BZT52-B27 (27 V, SOD-123), though voltage and thermal specs differ.
What is the maximum allowable reverse voltage before significant leakage in 1N6011B_T50R?
The 1N6011B_T50R exhibits ≤0.1 mA leakage current up to 23 V reverse voltage (VR), as specified in the datasheet. Beyond 23 V, leakage rises nonlinearly toward breakdown; operation above this value risks excessive power dissipation unless current is strictly limited by external series resistance.
How does thermal derating apply to 1N6011B_T50R in PCB layouts with short leads?
Derating for 1N6011B_T50R begins at 75°C lead temperature (TL), not ambient: 4.0 mW/°C reduction applies for each degree above 75°C at the lead-to-PCB interface. Shorter leads increase thermal resistance, lowering effective TL margin-designers must measure actual lead temperature under worst-case load to avoid exceeding 500 mW absolute maximum.
Is 1N6011B_T50R suitable for bidirectional ESD protection?
No, the 1N6011B_T50R is a unidirectional Zener diode optimized for DC voltage regulation and overvoltage clamping in one polarity. For bidirectional ESD protection, dedicated TVS diodes such as SMAJ28A (28 V unidirectional) or P6KE27CA (27 V bidirectional) provide faster response, lower clamping voltage, and specified IEC 61000-4-2 ratings-1N6011B_T50R lacks those certifications and timing characteristics.
1N6011B_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):
- 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_T50R FAQ
1.How can I place an order for 1N6011B_T50R through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6011B_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 1N6011B_T50R reliable?
The price and inventory of 1N6011B_T50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6011B_T50R is usually 5 days.
3.What payment methods are accepted for 1N6011B_T50R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6011B_T50R transactions.
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4.How is shipping managed for 1N6011B_T50R?
1N6011B_T50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6011B_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 1N6011B_T50R?
For technical support, including 1N6011B_T50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6011B_T50R requirements.
6.How does Aetrix verify that 1N6011B_T50R is sourced from the original manufacturer or authorized distributors?
All 1N6011B_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 1N6011B_T50R meets industry standards.
7.What is the process for return or replacement of 1N6011B_T50R?
All 1N6011B_T50R units undergo pre-shipment inspection (PSI). If there is an issue with 1N6011B_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 1N6011B_T50R part is unused and in its original packaging.
Return procedure for 1N6011B_T50R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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