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Microchip Technology 1N3511A/TR
- Part No.:
- 1N3511A/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N3511A/TR.pdf
- Description:
- DIODE ZENER 5.1V 400MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:9,509
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Product details
Overview
1N3511A/TR from Microsemi is a hermetically sealed DO-35 glass-case zener diode rated for 400mW power dissipation, with a nominal zener voltage of 5.1V at 20mA test current, ±5% tolerance, and maximum dynamic impedance of 14Ω. It operates across –65°C to +175°C junction temperature and serves as a precision voltage reference or overvoltage clamp in low-power analog circuits.
For engineers reviewing the 1N3511A/TR datasheet, 1N3511A/TR pinout, 1N3511A/TR application, or 1N3511A/TR equivalent, key selection factors include its 5.1V regulation accuracy, 14Ω zener impedance at 20mA, DO-35 package compatibility with through-hole PCB layouts, and suitability for temperature-stable biasing in instrumentation amplifiers and sensor signal conditioning.
Technical Context
This discrete zener diode functions exclusively in reverse-bias breakdown mode, delivering stable DC voltage regulation under controlled current conditions. Its 5.1V zener voltage is specified at 20mA (IZT) with ±5% tolerance and exhibits 14Ω dynamic impedance-critical for minimizing output voltage variation under load transients.
The DO-35 hermetically sealed glass package ensures long-term stability and low leakage (<1μA typical at 1V reverse bias), while the tin/lead lead finish supports reliable solder wetting. Junction temperature range (–65°C to +175°C) enables use in aerospace, industrial control, and downhole sensing environments where thermal robustness is mandatory.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.1 V at 20 mA - defines precise clamping/reference level for analog circuit biasing |
| Zener Voltage Tolerance | ±5% - ensures predictable regulation window across production lots |
| Zener Impedance (ZZT) | 14 Ω max at 20 mA - limits output voltage shift under varying load current |
| Power Dissipation | 400 mW - sets maximum continuous reverse power handling at 25°C ambient |
| Junction Temperature Range | –65°C to +175°C - supports operation in extreme environmental conditions without derating |
| Forward Voltage (VF) | ≤1.1 V at 200 mA - confirms low-loss conduction when used in forward-biased protection paths |
Pinout & Package
DO-35 hermetically sealed glass package with axial leads; cathode identified by a visible band on the glass body. Leads are tin/lead plated for solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse-bias reference ground node | Connected to lower-potential side in zener regulation; establishes reference return path |
| Cathode | Reverse-bias voltage input / Regulated output node | Connected to higher-potential supply rail; delivers stable 5.1V relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic DO-35 glass seal | Prevents moisture ingress and long-term parameter drift in harsh environments |
| ±5% zener voltage tolerance | Enables direct replacement in legacy 5V reference designs without recalibration |
| 14Ω max zener impedance | Reduces output ripple sensitivity in low-current feedback loops (e.g., op-amp references) |
| –65°C to +175°C operating range | Eliminates need for external thermal derating in high-temp industrial enclosures |
Applications
| Instrumentation Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Providing stable 5.1V reference for 12-bit ADC biasing in portable data loggers. IC Role / Device Role / Timing Role: Zener diode acting as shunt voltage reference for analog front-end precision. Use Value: ±5% tolerance and 14Ω impedance ensure <±10mV reference error across 1–20mA load variation. | Use Scenario: Protecting microcontroller I/O pins from ESD-induced voltage spikes on 5V bus lines. IC Role / Device Role / Timing Role: Shunt clamping device limiting transient voltage to ≤5.4V peak. Use Value: Fast response and hermetic reliability prevent latch-up during repeated 2kV HBM events. |
| Sensor Bias Supply | Power Rail Monitor |
Use Scenario: Supplying excitation voltage to silicon strain gauges in load-cell modules. IC Role / Device Role / Timing Role: Low-noise DC voltage source maintaining constant bridge bias current. Use Value: 400mW rating allows sustained 10mA bias current with <0.5% drift over –40°C to +85°C. | Use Scenario: Detecting brown-out condition on a 5V system rail using comparator input threshold. IC Role / Device Role / Timing Role: Precision voltage threshold generator feeding comparator reference pin. Use Value: 5.1V ±5% ensures reliable detection of drops below 4.85V without false triggers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4733A | Same 5.1V nominal, but plastic DO-41 package; 17Ω ZZT; 1W power rating | Higher power handling but larger footprint and non-hermetic construction | Preferred for cost-sensitive consumer designs where thermal cycling is minimal |
| BZX55C5V1 | 5.1V ±5%, DO-35 glass, but 500mW rating and 60Ω ZZT max | Higher impedance reduces regulation accuracy under dynamic loads | Acceptable for basic voltage limiting where precision is secondary to availability |
Compared with 1N3511A/TR, the 1N4733A offers higher power margin but sacrifices hermetic reliability, while the BZX55C5V1 trades regulation precision for broader distributor stock-making 1N3511A/TR optimal for mission-critical analog references requiring long-term stability.
Availability
1N3511A/TR is available at Aetrix Electronics and suitable for instrumentation reference, overvoltage clamp, and sensor bias supply applications requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 1N3511A/TR 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
Microsemi (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog, RF, and radiation-hardened components for aerospace, defense, and industrial markets.
The 1N3511A/TR belongs to Microsemi's legacy DO-35 zener diode family, engineered for precision voltage regulation in mission-critical systems where hermetic sealing and wide temperature operation are essential.
FAQ
What is the zener voltage and test current for the 1N3511A/TR?
The 1N3511A/TR has a nominal zener voltage of 5.1 V measured at a test current (IZT) of 20 mA. This value is guaranteed within ±5% tolerance at 25°C ambient, per Microsemi LDS-0063 Rev. 2. The 1N3511A/TR maintains this specification across its full operating temperature range when properly heat-sinked or operated within its 400mW power limit.
Is the 1N3511A/TR hermetically sealed, and what package does it use?
Yes, the 1N3511A/TR uses a hermetically sealed DO-35 glass package, as confirmed in the official Microsemi technical datasheet LDS-0063. The glass envelope prevents moisture penetration and ensures parametric stability over time-critical for high-reliability applications. The cathode is marked by a visible band on the glass body, and leads are tin/lead plated for solder compatibility.
What is the maximum zener impedance of the 1N3511A/TR, and why does it matter?
The 1N3511A/TR has a maximum zener impedance (ZZT) of 14 Ω at 20 mA, per LDS-0063. This low dynamic impedance means the output voltage varies minimally with changes in current-enabling tighter regulation in feedback networks and reference circuits. For example, a 1 mA load shift causes only ~14 mV deviation, making the 1N3511A/TR suitable for precision analog designs.
Can the 1N3511A/TR be used in high-temperature environments?
Yes, the 1N3511A/TR is rated for junction temperatures from –65°C to +175°C, verified in Microsemi's maximum ratings table. Its hermetic DO-35 construction sustains performance without parameter drift in ovens, motor controls, or downhole tools. Derating is required above 25°C ambient per the 500mW @ TEC = +125°C curve, but the 1N3511A/TR remains functional up to its absolute maximum junction temperature.
How does the 1N3511A/TR compare to modern SMD zener diodes in terms of reliability?
The 1N3511A/TR's hermetic DO-35 glass package provides superior long-term reliability versus plastic-packaged SMD zeners, especially in humid or thermally cycled environments. While SMD alternatives offer board space savings, the 1N3511A/TR retains lower leakage, better parameter stability, and proven field history in aerospace and industrial systems-making it preferred where mean-time-between-failure is critical.
1N3511A/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 5.1 V
- Tolerance:
- ±5%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 14 Ohms
- Current - Reverse Leakage @ Vr:
- -
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
1N3511A/TR FAQ
1.How can I place an order for 1N3511A/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N3511A/TR 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 1N3511A/TR reliable?
The price and inventory of 1N3511A/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N3511A/TR is usually 5 days.
3.What payment methods are accepted for 1N3511A/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N3511A/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N3511A/TR?
1N3511A/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N3511A/TR 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 1N3511A/TR?
For technical support, including 1N3511A/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N3511A/TR requirements.
6.How does Aetrix verify that 1N3511A/TR is sourced from the original manufacturer or authorized distributors?
All 1N3511A/TR 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 1N3511A/TR meets industry standards.
7.What is the process for return or replacement of 1N3511A/TR?
All 1N3511A/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N3511A/TR, 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 1N3511A/TR part is unused and in its original packaging.
Return procedure for 1N3511A/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N3511A/TR Tags
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MMBZ5240B-7-F
Diodes Incorporated
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onsemi
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Micro Commercial Co
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