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Microchip Technology 1N3911
- Part No.:
- 1N3911
- Manufacturer:
- Microchip Technology
- Category:
- Single Diodes
- Package:
- DO-203AB, DO-5, Stud
- Datasheet:
-
1N3911.pdf
- Description:
- DIODE GEN PURP 200V 30A DO5
- Quantity:
- Payment:
- Shipping:
Inventory:2,409
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Product details
Overview
1N3911 from Microsemi is a high-reliability fast recovery rectifier diode rated for 200 V peak reverse voltage (VRRM), 50 A average forward current (IF) at TC = 100°C, and 150 ns reverse recovery time (Trr) under specified test conditions. It operates from –65°C to +150°C junction temperature and is qualified per MIL-PRF-19500/308 for aerospace and defense power conversion systems.
For engineers reviewing the 1N3911 datasheet, 1N3911 pinout, 1N3911 application, or 1N3911 equivalent, this part serves as a rugged, stud-mounted rectifier in high-current DC power supplies, motor drive snubbers, and military-grade switching power converters where thermal robustness and fast turn-off are critical.
Technical Context
This device is a single-junction, silicon planar epitaxial fast recovery rectifier with an anode-to-stud construction. Its DO-203AB (DO-5) metal package enables direct heatsinking via threaded stud mounting, supporting thermal resistance of 0.8°C/W (junction-to-case).
The 1N3911 achieves 150 ns reverse recovery time at VRM = 30 V and IF = 1 A, enabling efficient operation in medium-frequency switching circuits up to ~100 kHz. Its 6 mA reverse leakage at 200 V and 150°C confirms stable blocking performance under elevated thermal stress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 200 V - Maximum reverse voltage the device blocks reliably in circuit without breakdown. |
| IF (TC = 100°C) | 50 A - Continuous forward current capability when case temperature is held at 100°C. |
| Trr | 150 ns - Time required to transition from conduction to full blocking state; enables efficient medium-frequency switching. |
| RθJC | 0.8 °C/W - Thermal resistance from junction to case; supports high-power dissipation with minimal ΔT across stud interface. |
| IRM (200 V, 150°C) | 6 mA - Reverse leakage current at max rated voltage and max operating temperature; defines worst-case power loss in blocking state. |
| Tj Range | –65°C to +150°C - Operating junction temperature range validated for military and space-grade reliability. |
Pinout & Package
Package: DO-203AB (DO-5) metal stud-mount package with threaded anode terminal and insulated cathode stud. Case serves as anode connection; cathode is isolated via insulating washer or bushing in mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Stud) | Forward current entry point | Metal case and threaded stud form the anode; requires mechanical mounting to heatsink with electrical continuity. |
| Cathode (Isolated Stud) | Forward current exit point | Second insulated stud provides cathode connection; isolation prevents shorting to chassis or heatsink. |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/308 qualification | Meets screening, testing, and reliability requirements for Class B and Class S high-reliability applications. |
| 150°C maximum junction temperature | Enables operation in sealed enclosures or high-ambient environments without derating penalties beyond datasheet curves. |
| 0.8°C/W junction-to-case thermal resistance | Allows direct thermal coupling to cold plates or chassis, minimizing need for additional thermal interface materials. |
| 400 A peak surge rating (IFSM) | Withstands repetitive line surges and motor-start transients in industrial motor drives and generator excitation circuits. |
Applications
| Avionics Power Supply | Industrial Motor Drive |
|---|---|
Use Scenario: High-density DC power generation in airborne radar and communication subsystems requiring EMI-controlled rectification. IC Role / Device Role / Timing Role: Fast recovery rectifier in three-phase bridge configuration converting 400 Hz aircraft AC to regulated DC bus. Use Value: 150 ns Trr minimizes switching losses and reduces RFI generation during commutation, meeting MIL-STD-461 CS115 limits. | Use Scenario: Regenerative braking and DC link rectification in variable-frequency drives for HVAC and pump control. IC Role / Device Role / Timing Role: Main rectifier in uncontrolled front-end bridge supplying DC bus for IGBT inverter stage. Use Value: 50 A continuous rating and 400 A surge capacity handle motor startup currents and regenerative energy spikes without thermal runaway. |
| Military Vehicle Power System | High-Reliability UPS |
Use Scenario: 28 V DC power conditioning in armored vehicle electronics, exposed to wide ambient temperature swings and vibration. IC Role / Device Role / Timing Role: Input rectifier in dual-redundant DC-DC converter feeding mission-critical avionics rails. Use Value: –65°C to +150°C operating range and MIL-spec screening ensure functional integrity during extreme cold starts and engine-bay thermal soak. | Use Scenario: Critical infrastructure backup power systems requiring >20-year field life and zero failure-in-time (FIT) tolerance. IC Role / Device Role / Timing Role: Primary rectifier in offline UPS battery charger and inverter input stage. Use Value: 0.8°C/W RθJC and low IRM at 150°C enable stable long-term operation under continuous load without thermal cycling fatigue. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast recovery rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| VMI1500-200 | Higher VRRM (200 V same), lower Trr (75 ns), TO-247AC package, no stud mount | Requires PCB mounting and external heatsink; unsuitable for direct-chassis stud installation | Select when faster switching and surface-mount integration outweigh mechanical mounting constraints. |
| IXYS MBR50200CT | Lower VRRM (200 V same), Schottky architecture, 1.1 V VFM, but limited to 125°C max Tj | Limited to commercial/industrial ambient; not qualified for MIL-PRF-19500 screening or extended temperature operation | Select only for cost-sensitive non-military applications where low forward drop is prioritized over reliability and temperature range. |
Compared with VMI1500-200 and MBR50200CT, the 1N3911 uniquely combines MIL-qualified reliability, stud-mount thermal management, and 150°C operation-making it irreplaceable in aerospace, defense, and nuclear instrumentation where mechanical robustness and extended temperature compliance are non-negotiable.
Availability
1N3911 is available at Aetrix Electronics and suitable for avionics power supplies, industrial motor drives, military vehicle power systems, and high-reliability UPS requiring stable component supply across extended product lifecycles.
Supply support for 1N3911 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) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.
The 1N3911 belongs to Microsemi's legacy high-reliability rectifier family, engineered specifically for mission-critical power conversion where MIL-PRF-19500 qualification, extreme temperature operation, and mechanical ruggedness are mandatory.
FAQ
What is the peak reverse voltage rating for the 1N3911?
The 1N3911 has a peak reverse voltage (VRRM) rating of 200 V, verified per MIL-PRF-19500/308 test conditions. This value represents the maximum instantaneous reverse voltage the 1N3911 can block without breakdown under normal operating conditions and is confirmed in the Absolute Maximum Ratings table on page 1 of the T4-LDS-0144 datasheet.
Does the 1N3911 have a stud-mounted package, and how is polarity configured?
Yes, the 1N3911 uses a DO-203AB (DO-5) metal stud-mount package. The main threaded stud serves as the anode, while the cathode is provided via a second insulated stud. This configuration allows direct thermal and electrical connection of the anode to a heatsink or chassis, with cathode isolation maintained by insulating hardware.
What is the reverse recovery time of the 1N3911, and under what test conditions is it measured?
The 1N3911 has a reverse recovery time (Trr) of 150 ns, measured at VRM = 30 V and IF = 1 A, per the Electrical Characteristics table on page 1 of the T4-LDS-0144 datasheet. This value applies to all "A" suffix variants including the 1N3911, and reflects performance at room temperature with specified pulse conditions.
Is the 1N3911 qualified to any military specifications?
Yes, the 1N3911 is qualified per MIL-PRF-19500/308, which governs high-reliability semiconductor devices for defense applications. This qualification includes rigorous environmental, electrical, and life testing, and is explicitly stated in the header of the T4-LDS-0144 datasheet used for the 1N3911.
What is the maximum allowable junction temperature for continuous operation of the 1N3911?
The 1N3911 supports a maximum junction temperature (Tj) of +150°C for continuous operation, as specified in the Absolute Maximum Ratings table. This rating is validated across the full operating case temperature range and is integral to its qualification for high-reliability aerospace and defense systems.
1N3911 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-203AB, DO-5, Stud
- Packaging:
- Bulk
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 200 V
- Current - Average Rectified (Io):
- 30A
- Voltage - Forward (Vf) (Max) @ If:
- 1.4 V @ 50 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 200 ns
- Current - Reverse Leakage @ Vr:
- 15 µA @ 200 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Stud Mount
- Supplier Device Package:
- DO-5 (DO-203AB)
- Operating Temperature - Junction:
- -65°C ~ 150°C
1N3911 FAQ
1.How can I place an order for 1N3911 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N3911 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 1N3911 reliable?
The price and inventory of 1N3911 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N3911 is usually 5 days.
3.What payment methods are accepted for 1N3911?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N3911 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N3911?
1N3911 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N3911 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 1N3911?
For technical support, including 1N3911 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N3911 requirements.
6.How does Aetrix verify that 1N3911 is sourced from the original manufacturer or authorized distributors?
All 1N3911 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 1N3911 meets industry standards.
7.What is the process for return or replacement of 1N3911?
All 1N3911 units undergo pre-shipment inspection (PSI). If there is an issue with 1N3911, 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 1N3911 part is unused and in its original packaging.
Return procedure for 1N3911:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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