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Microchip Technology 1N3893
- Part No.:
- 1N3893
- Manufacturer:
- Microchip Technology
- Category:
- Single Diodes
- Package:
- DO-203AA, DO-4, Stud
- Datasheet:
-
1N3893.pdf
- Description:
- DIODE GEN PURP 400V 12A DO203AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,383
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Product details
Overview
1N3893 from Microsemi is a hermetically sealed, fast-recovery rectifier diode in DO-203AA (DO-4) metal-glass package, rated for 400 V repetitive peak reverse voltage (VRRM), 20 A average forward current (IO) at TC = 100 °C, and 250 A non-repetitive surge current (IFSM). It serves as a primary power conversion element in high-reliability DC power supplies and ultrasonic systems.
For engineers reviewing the 1N3893 datasheet, 1N3893 pinout, 1N3893 application, or 1N3893 equivalent, key selection criteria include its JANTXV qualification per MIL-PRF-19500/304, 150 ns reverse recovery time (trr) at TC = 55 °C, low thermal resistance (RθJC = 1.5 °C/W for "A" variant), and anode-to-stud polarity option.
Technical Context
The 1N3893 operates as a unidirectional, silicon-based fast-recovery rectifier optimized for high-efficiency switching in harsh-environment power conversion. Its design targets minimal conduction loss (VFM = 1.5 V @ IFM = 38 A, TC = 25 °C) and rapid turn-off (trr = 150 ns) to reduce switching losses in inverters and choppers.
It features a hermetically sealed metal-glass case with threaded 10-32 UNF3A stud termination, enabling direct heat sinking and mechanical mounting. Thermal performance is defined by RθJC = 1.5 °C/W (for "A" version), junction temperature range of –65 °C to +175 °C, and RoHS-compliant variants available with "e3" suffix.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - Maximum repetitive reverse voltage the device blocks reliably in circuit operation. |
| IO (TC = 100 °C) | 20 A - Continuous forward current capability when case temperature is held at 100 °C. |
| IFSM (8.3 ms) | 250 A - Peak surge current tolerance during transient overload events like line surges. |
| trr | 150 ns - Time required to transition from forward conduction to reverse blocking, critical for high-frequency switching efficiency. |
| VFM | 1.5 V @ IFM = 38 A, TC = 25 °C - Forward voltage drop defining conduction loss and thermal dissipation at rated pulse conditions. |
| RθJC | 1.5 °C/W - Junction-to-case thermal resistance for "A" variant, directly determining heatsink sizing requirements. |
| TJ & TSTG | –65 °C to +175 °C - Operating and storage temperature range supporting military and aerospace deployment. |
Pinout & Package
Package: DO-203AA (DO-4) hermetically sealed metal-glass case with 10-32 UNF3A threaded stud terminal. Cathode-to-stud polarity is standard; anode-to-stud versions marked with "R" suffix.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Stud (Metal Case) | Cathode (standard), Anode (R-suffix) | Primary thermal and electrical connection point; must be electrically isolated from chassis unless polarity matches circuit ground reference. |
| Eyelet Lead | Anode (standard), Cathode (R-suffix) | Solder-dipped tinned or matte-tin plated lead for PCB or busbar connection; carries full forward current path. |
Key Features
| Feature | Design Value |
|---|---|
| Fast recovery time | 150 ns trr enables efficient operation up to ~1 MHz switching frequencies in DC-DC converters and inverters. |
| Hermetic metal-glass seal | Ensures long-term reliability and moisture resistance in high-humidity, vacuum, or radiation-prone environments. |
| JANTXV qualification | Fully qualified to MIL-PRF-19500/304 Level JANTXV, including screening, testing, and traceability for defense/aerospace use. |
| Low thermal resistance | RθJC = 1.5 °C/W allows higher power density without exceeding TJ limit when mounted on properly sized heatsinks. |
| Stud-mount mechanical interface | 10-32 UNF3A threaded stud enables direct bolt-down thermal coupling and mechanical stability in high-vibration systems. |
Applications
| High-Voltage DC Power Supplies | Inverters & Motor Drives |
|---|---|
Use Scenario: Front-end AC/DC rectification in 400 V-rated industrial power supplies operating under wide ambient temperature ranges. IC Role / Device Role / Timing Role: Primary high-voltage, high-current rectifier converting AC line input to bulk DC bus. Use Value: 400 V VRRM rating and 250 A IFSM ensure robustness against line transients and sustained overloads without derating. | Use Scenario: DC bus freewheeling and regeneration paths in three-phase motor inverters used in aerospace actuators. IC Role / Device Role / Timing Role: Freewheeling diode clamping inductive kickback during IGBT switching transitions. Use Value: 150 ns trr minimizes reverse recovery energy loss and prevents shoot-through in high-frequency PWM stages. |
| Ultrasonic Generators | Military Chopper Circuits |
Use Scenario: High-frequency rectification in 20–100 kHz ultrasonic cleaning and welding generators requiring stable output under thermal cycling. IC Role / Device Role / Timing Role: Output stage rectifier delivering clean DC to piezoelectric transducer drivers. Use Value: Hermetic sealing and –65 °C to +175 °C TJ range maintain parameter stability across repeated thermal stress cycles. | Use Scenario: Pulse-width modulated DC choppers in vehicle-mounted radar power conditioning units. IC Role / Device Role / Timing Role: Main switching rectifier handling high di/dt and repetitive surge currents in pulsed loads. Use Value: JANTXV qualification guarantees lot traceability, burn-in, and radiation hardness assurance for mission-critical field deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast-recovery rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N3891 | 200 V VRRM, same package and trr (150 ns), lower voltage rating. | Not suitable for 400 V bus designs; limited to ≤200 V DC-link applications. | Select only if system maximum reverse voltage is ≤200 V and cost or legacy BOM compatibility is prioritized. |
| VS-20EWH04-M3 | 400 V VRRM, TO-247AC package, 35 ns trr, 20 A IO, but not MIL-qualified. | Lacks JANTXV screening and hermetic seal; unsuitable for space or defense deployments. | Choose for commercial high-frequency SMPS where ultra-fast recovery outweighs environmental ruggedness. |
Compared with 1N3893, 1N3891 offers identical thermal and recovery performance at half the voltage rating, while VS-20EWH04-M3 delivers superior speed in a plastic package but forfeits military-grade reliability and hermetic integrity.
Availability
1N3893 is available at Aetrix Electronics and suitable for high-reliability DC power supplies, ultrasonic systems, and military chopper circuits requiring stable component supply across extended product lifecycles.
Supply support for 1N3893 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 Corporation (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog and mixed-signal ICs, discrete devices, and RF solutions for aerospace, defense, and industrial markets.
The 1N3893 belongs to Microsemi's legacy MIL-qualified fast-recovery rectifier family, engineered specifically for ruggedized power conversion in mission-critical systems where hermeticity, surge immunity, and extended temperature operation are mandatory.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) for the 1N3893?
The 1N3893 has a VRRM rating of 400 V, meaning it can reliably block up to 400 volts of repetitive reverse voltage in normal operation. This value is confirmed in the Electrical Characteristics table on page 3 of T4-LDS-0143 Rev. 2 and defines the upper limit for DC bus or rectified output voltage design margins. Exceeding this rating risks avalanche breakdown and permanent failure.
Is the 1N3893 available in both cathode-to-stud and anode-to-stud configurations?
Yes, the 1N3893 is offered in both polarities: standard configuration has cathode connected to the stud (unmarked), while the "R" suffix variant (e.g., 1N3893R) denotes anode-to-stud polarity. Polarity is marked on the device body per Package Dimensions note #10, and the stud must be correctly referenced to circuit ground or high-side potential accordingly.
Does the 1N3893 meet MIL-PRF-19500/304 requirements?
Yes, the 1N3893 is qualified to MIL-PRF-19500/304 at JANTX and JANTXV levels, as stated in the DESCRIPTION section on page 1 of T4-LDS-0143 Rev. 2. This includes rigorous screening, environmental testing, and lot traceability-making the 1N3893 suitable for defense and aerospace applications where reliability and documentation rigor are mandated.
What is the reverse recovery time (trr) of the 1N3893 and under what test conditions?
The 1N3893 has a maximum reverse recovery time (trr) of 150 ns, measured under conditions of IF = 1 A, VR = 30 V, di/dt = 25 A/µs, and TC = 55 °C, as specified on page 3 of the datasheet. This value applies to the "A" current-rated variant and is critical for minimizing switching losses in high-frequency converter topologies.
Can the 1N3893 be used as a freewheeling diode in inductive load circuits?
Yes, the 1N3893 is explicitly recommended as a freewheeling diode in the DESCRIPTION section on page 1. Its fast recovery time (150 ns), high surge rating (250 A IFSM), and low thermal resistance (1.5 °C/W) make it well-suited for clamping inductive kickback in motor drives, choppers, and relay drivers-provided polarity and mounting thermal path are correctly implemented.
1N3893 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-203AA, DO-4, Stud
- Packaging:
- Bulk
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 400 V
- Current - Average Rectified (Io):
- 12A
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 38 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 200 ns
- Current - Reverse Leakage @ Vr:
- 25 µA @ 50 V
- Capacitance @ Vr, F:
- 115pF @ 10V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Stud Mount
- Supplier Device Package:
- DO-203AA (DO-4)
- Operating Temperature - Junction:
- -65°C ~ 175°C
1N3893 FAQ
1.How can I place an order for 1N3893 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N3893 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 1N3893 reliable?
The price and inventory of 1N3893 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N3893 is usually 5 days.
3.What payment methods are accepted for 1N3893?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N3893 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N3893?
1N3893 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N3893 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 1N3893?
For technical support, including 1N3893 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N3893 requirements.
6.How does Aetrix verify that 1N3893 is sourced from the original manufacturer or authorized distributors?
All 1N3893 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 1N3893 meets industry standards.
7.What is the process for return or replacement of 1N3893?
All 1N3893 units undergo pre-shipment inspection (PSI). If there is an issue with 1N3893, 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 1N3893 part is unused and in its original packaging.
Return procedure for 1N3893:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N3893 Tags
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