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Microchip Technology 1N3511A-1
- Part No.:
- 1N3511A-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N3511A-1.pdf
- Description:
- DIODE ZENER 5.1V 400MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:8,669
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Product details
Overview
1N3511A-1 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 zener impedance of 14Ω - used for precision voltage regulation in low-power analog reference and biasing circuits.
For engineers reviewing the 1N3511A-1 datasheet, 1N3511A-1 pinout, 1N3511A-1 application, or 1N3511A-1 equivalent, key selection criteria include zener voltage stability under 20mA IZT, thermal performance up to +175°C junction temperature, DO-35 mechanical compatibility, and low-impedance regulation for feedback loops in linear regulators and sensor signal conditioning.
Technical Context
This discrete zener diode operates in reverse breakdown mode to maintain stable DC voltage across its terminals. Its 5.1V nominal zener voltage is specified at 20mA with tight ±5% tolerance and low dynamic impedance (14Ω max), enabling accurate voltage clamping and reference generation in thermally constrained environments.
The device features a hermetically sealed DO-35 glass package with tin/lead lead finish and cathode band polarity marking. It supports operation from –65°C to +175°C junction temperature and delivers 400mW power rating at 25°C ambient, derating linearly to 500mW at +125°C case temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.1 V at 20 mA - defines stable regulation point for reference and clamp applications |
| Zener Voltage Tolerance | ±5% - ensures predictable voltage accuracy without post-selection trimming |
| Zener Impedance (ZZT) | 14 Ω max at 20 mA - minimizes output voltage variation under load current changes |
| Power Dissipation | 400 mW at 25°C - sets maximum continuous steady-state power handling capability |
| Junction Temperature Range | –65°C to +175°C - enables use in extended industrial and aerospace environments |
| Forward Voltage (VF) | ≤1.1 V at 200 mA - confirms low-loss conduction in forward-biased protection configurations |
Pinout & Package
Package: DO-35 hermetically sealed glass case with axial leads; cathode identified by a visible band on the glass body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive terminal in forward bias; connected to lower potential during zener operation | Provides current entry path when used as forward diode; ties to ground or common in shunt regulator topology |
| Cathode | Negative terminal in forward bias; higher-potential connection during zener breakdown | Connected to regulated output node; cathode band marks this terminal for correct PCB orientation |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic DO-35 glass package | Ensures long-term reliability and moisture resistance in harsh environments without conformal coating |
| ±5% zener voltage tolerance | Reduces need for external trimming or binning in production voltage reference designs |
| 14 Ω max zener impedance | Supports stable regulation under varying load conditions in feedback networks and analog comparators |
| –65°C to +175°C operating range | Validates suitability for under-hood automotive, downhole, and military-grade embedded systems |
Applications
| Industrial Sensor Biasing | Low-Power Voltage Reference |
|---|---|
Use Scenario: Providing stable excitation voltage to resistive bridge sensors in process control transmitters. IC Role / Device Role / Timing Role: Shunt voltage regulator establishing fixed 5.1V reference for Wheatstone bridge biasing. Use Value: Low 14Ω impedance maintains <±10mV drift over 0–15mA load variation, improving sensor linearity. | Use Scenario: Generating precise DC reference for ADC input scaling in battery-powered IoT nodes. IC Role / Device Role / Timing Role: Passive voltage reference source replacing higher-cost IC references where 5% accuracy suffices. Use Value: 400mW rating allows operation from 9V supply with series resistor, minimizing BOM count and board space. |
| Overvoltage Clamp Circuit | Linear Regulator Feedback Node |
Use Scenario: Protecting microcontroller I/O pins against transient surges in industrial HMI interfaces. IC Role / Device Role / Timing Role: Reverse-biased clamping element limiting voltage to 5.1V ±5% during ESD or inductive kick events. Use Value: Fast response and hermetic construction ensure repeatable clamping without degradation after repeated 2kV HBM events. | Use Scenario: Setting output voltage in adjustable LDO designs using TLV7xx series regulators. IC Role / Device Role / Timing Role: Zener-connected between feedback divider and ground to shift reference point. Use Value: Tight 5.1V tolerance directly translates to ±5% output voltage accuracy without calibration. |
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 VZ, but plastic DO-41 package and 100Ω max ZZT | Limited to commercial temperature range (–65°C to +175°C not guaranteed); higher impedance reduces regulation fidelity | Prefer 1N3511A-1 where hermetic sealing or low-impedance regulation is required |
| BZX55C5V1 | 5.1V VZ, ±5%, but 60Ω max ZZT and DO-35 package with different lead finish | Specified only to +150°C junction; not qualified for aerospace or high-reliability screening | Choose 1N3511A-1 for extended temperature compliance and tighter impedance spec |
Compared with 1N4733A and BZX55C5V1, the 1N3511A-1 offers superior zener impedance (14Ω vs ≥60Ω), full military-grade temperature range, and hermetic reliability - making it optimal for precision analog, aerospace, and high-stability industrial designs where regulation accuracy and long-term parametric stability are critical.
Availability
1N3511A-1 is available at Aetrix Electronics and suitable for industrial sensor biasing, low-power voltage reference, and overvoltage clamp circuits requiring stable component supply with traceable lot history and extended temperature qualification.
Supply support for 1N3511A-1 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-1 belongs to Microsemi's legacy DO-35 zener diode family, engineered for precision voltage regulation in mission-critical systems demanding hermetic packaging, wide temperature operation, and low dynamic impedance.
FAQ
What is the zener voltage and test current for the 1N3511A-1?
The 1N3511A-1 has a nominal zener voltage of 5.1 V measured at a test current (IZT) of 20 mA, with a tolerance of ±5%. This specification is verified per Microsemi LDS-0063 Rev. 2 under thermal equilibrium at 25°C ambient. The 1N3511A-1 maintains this voltage regulation characteristic across its full operating temperature range.
What package type does the 1N3511A-1 use, and how is polarity identified?
The 1N3511A-1 uses a DO-35 hermetically sealed glass package with axial leads and tin/lead plating. Polarity is marked by a visible cathode band on the glass body - the banded end is the cathode terminal. This physical marking ensures correct orientation during manual or automated placement in shunt regulator or clamp configurations.
What is the maximum zener impedance of the 1N3511A-1, and why does it matter?
The 1N3511A-1 has a maximum zener impedance (ZZT) of 14 Ω at 20 mA. This low dynamic impedance ensures minimal voltage deviation under changing load currents - critical for maintaining accuracy in voltage references and feedback networks. A lower ZZT directly improves regulation stability compared to alternatives like the BZX55C5V1 (60Ω) or 1N4733A (100Ω).
Can the 1N3511A-1 operate at elevated temperatures, and what is its junction limit?
Yes, the 1N3511A-1 is rated for junction and storage temperatures from –65°C to +175°C. This extended range is enabled by its hermetic DO-35 construction and internal material design. Engineers deploying the 1N3511A-1 in under-hood automotive, downhole, or avionics applications rely on this specification for long-term parametric stability without derating penalties below +175°C.
How does the 1N3511A-1 differ from standard plastic-packaged zeners like the 1N4733A?
The 1N3511A-1 differs from the 1N4733A in three key ways: it uses a hermetic DO-35 glass package (vs. plastic DO-41), achieves 14Ω max zener impedance (vs. 100Ω), and is fully rated over –65°C to +175°C (vs. commercial-grade limits). These differences make the 1N3511A-1 suitable for high-reliability applications where environmental robustness and regulation fidelity are non-negotiable.
1N3511A-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Bulk
- 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-1 FAQ
1.How can I place an order for 1N3511A-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N3511A-1 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-1 reliable?
The price and inventory of 1N3511A-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N3511A-1 is usually 5 days.
3.What payment methods are accepted for 1N3511A-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N3511A-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N3511A-1?
1N3511A-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N3511A-1 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-1?
For technical support, including 1N3511A-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N3511A-1 requirements.
6.How does Aetrix verify that 1N3511A-1 is sourced from the original manufacturer or authorized distributors?
All 1N3511A-1 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-1 meets industry standards.
7.What is the process for return or replacement of 1N3511A-1?
All 1N3511A-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N3511A-1, 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-1 part is unused and in its original packaging.
Return procedure for 1N3511A-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N3511A-1 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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MM5Z5V1ST1G
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Micro Commercial Co
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