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Microchip Technology 1N3890R
- Part No.:
- 1N3890R
- Manufacturer:
- Microchip Technology
- Category:
- Single Diodes
- Package:
- DO-203AA, DO-4, Stud
- Datasheet:
-
1N3890R.pdf
- Description:
- DIODE GEN PURP 100V 12A DO203AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,968
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Product details
Overview
1N3890R from Microsemi is a hermetically sealed, fast recovery rectifier diode in DO-203AA (DO-4) metal-glass package with anode-to-stud polarity, rated for 100 V repetitive peak reverse voltage (VRRM), 12 A average forward current (IO) at TC = 100 °C, and 200 ns reverse recovery time (trr) at TC = 55 °C. It serves as a primary rectifier or freewheeling diode in high-reliability DC power supplies and military-grade inverters.
For engineers reviewing the 1N3890R datasheet, 1N3890R pinout, 1N3890R application, or 1N3890R equivalent, key selection criteria include its JANTX-qualified MIL-PRF-19500/304 compliance, low thermal resistance (RθJC = 2.0 °C/W), hermetic metal-glass construction, and stud-mount mechanical interface requiring 10–15 inch-pounds torque.
Technical Context
This device operates as a unidirectional power rectifier with controlled minority-carrier lifetime to achieve fast recovery. Its junction capacitance is 115 pF at VR = 10 V and f = 1 MHz, and it sustains up to 175 A non-repetitive surge current (IFSM) under 8.3 ms half-sine conditions.
The 1N3890R exhibits a maximum forward voltage of 1.5 V at IFM = 38 A and TC = 25 °C, and leakage remains ≤10 µA at VRM = 100 V and TC = 25 °C. Its thermal design relies on direct case-to-heatsink conduction via the threaded stud terminal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - Maximum repetitive reverse voltage before breakdown; defines safe operating limit in rectifier bridge arms. |
| IO (TC = 100 °C) | 12 A - Continuous forward current capability with heatsink; derates linearly above 100 °C. |
| trr | 200 ns - Time to transition from conduction to blocking; critical for minimizing switching losses in 20–100 kHz converters. |
| VFM (IFM = 38 A) | 1.5 V - Forward drop at high pulse current; determines conduction loss and thermal load at peak load. |
| RθJC | 2.0 °C/W - Thermal resistance from junction to case; enables accurate heatsink sizing using stud-mounted thermal path. |
| IRM (VRM = 100 V) | 10 µA - Reverse leakage at rated voltage and 25 °C; ensures minimal standby power loss in high-impedance circuits. |
| IFSM (8.3 ms) | 175 A - Surge withstand without failure; supports inrush current handling in AC/DC front-ends. |
Pinout & Package
Package: DO-203AA (DO-4) - hermetically sealed metal-glass case with 10-32 UNF3A threaded stud terminal; weight ≈5 g; maximum stud torque: 10–15 inch-pounds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Stud (Anode) | Anode connection | Threaded metal stud serves as both mechanical mounting point and primary anode terminal; requires conductive heatsink interface. |
| Eyelet (Cathode) | Cathode connection | Solder-dipped eyelet provides secondary cathode termination; must be electrically isolated from stud unless circuit design permits common reference. |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic metal-glass sealing | Enables operation in harsh environments (military, aerospace, industrial) with guaranteed long-term reliability and zero moisture ingress. |
| JANTX qualification per MIL-PRF-19500/304 | Validated screening for temperature cycling, vibration, and burn-in; required for defense and space-grade power systems. |
| Anode-to-stud polarity (R suffix) | Allows direct mounting to grounded heatsinks while maintaining correct bias; eliminates need for insulating washers in many topologies. |
| Low RθJC (2.0 °C/W) | Supports higher power density by enabling efficient heat transfer from junction to external heatsink via stud interface. |
Applications
| Military DC Power Supply | Industrial Inverter Drive |
|---|---|
Use Scenario: Primary input rectification in 28 V or 115 VAC-to-DC converters for airborne avionics units. IC Role / Device Role / Timing Role: Fast recovery rectifier in full-wave bridge configuration handling 60 Hz or 400 Hz input. Use Value: JANTX qualification and hermetic seal ensure uninterrupted operation under shock, vibration, and extended temperature cycling (-65 to +175 °C). | Use Scenario: Freewheeling diode across IGBTs in motor drive output stages operating at 2–10 kHz switching frequency. IC Role / Device Role / Timing Role: Clamp inductive kickback during IGBT turn-off; recovers within 200 ns to prevent cross-conduction. Use Value: Low trr and 175 A surge rating suppress voltage spikes and protect switching devices during transient overload events. |
| Ultrasonic Generator | High-Reliability Chopper Circuit |
Use Scenario: Output rectification in resonant tank-based ultrasonic cleaning or welding systems operating at 20–40 kHz. IC Role / Device Role / Timing Role: High-frequency rectifier in voltage-doubler or full-wave configuration delivering stable DC bias to transducer drivers. Use Value: Stable CJ (115 pF) and low VFM minimize phase shift and conduction loss at ultrasonic frequencies, preserving efficiency. | Use Scenario: Main rectifier in DC chopper for battery-powered traction control in rail signaling or mining equipment. IC Role / Device Role / Timing Role: Unidirectional current path in buck-derived topology regulating 12–72 V DC bus under intermittent high-current loads. Use Value: Hermetic packaging and 12 A continuous rating support long service life in unattended, thermally constrained enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast recovery rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N3890AR | 20 A average forward current rating (vs. 12 A); same VRRM, trr, and package. | Higher continuous current capacity suits larger heatsinked designs or extended duty cycles. | Select 1N3890AR when IO > 12 A is required; verify thermal margin with RθJC = 2.0 °C/W and increased I²t stress. |
| 1N3891R | 200 V VRRM (vs. 100 V); identical trr, RθJC, and mechanical form factor. | Supports higher input voltage bridges (e.g., 115 VAC full-wave) without series stacking. | Choose 1N3891R for 200 V-class systems; confirm reverse leakage (≤10 µA at 200 V, 25 °C) meets design margin. |
Compared with 1N3890R, the 1N3890AR delivers +67% average current but demands higher thermal management, while the 1N3891R doubles reverse voltage rating with no change in recovery speed or mounting-enabling direct substitution only where voltage headroom is the limiting factor.
Availability
1N3890R is available at Aetrix Electronics and suitable for military DC power supplies, industrial inverter drives, ultrasonic generators, and high-reliability chopper circuits requiring stable component supply across extended product lifecycles.
Supply support for 1N3890R 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 components for aerospace, defense, and industrial markets.
The 1N3889–1N3893 family was engineered for ruggedized power conversion in mission-critical systems, emphasizing hermeticity, MIL-spec qualification, and stud-mount thermal performance over cost-optimized plastic-packaged alternatives.
FAQ
What is the maximum junction temperature rating for the 1N3890R?
The 1N3890R has a specified junction and storage temperature range of –65 °C to +175 °C. This wide range supports operation in extreme environments such as aircraft bays or industrial enclosures without forced cooling. The 1N3890R's thermal design must maintain TJ ≤ +175 °C under worst-case power dissipation and ambient conditions.
Does the 1N3890R have RoHS-compliant variants?
Yes, RoHS-compliant versions of the 1N3890R are available with the "e3" suffix (e.g., 1N3890Re3), featuring matte-tin plating instead of tin-lead. These comply with Directive 2011/65/EU and are offered for commercial-grade units only-not for JAN/JANTX/JANTXV qualified parts.
How is polarity indicated on the 1N3890R package?
The "R" suffix in 1N3890R explicitly denotes anode-to-stud polarity. The device is marked with the part number and an "R" after the digits on the metal case. Cathode-to-stud (standard polarity) versions omit the "R" and are unmarked for polarity-confirm orientation via multimeter diode test before installation.
What is the recommended stud mounting torque for the 1N3890R?
The manufacturer specifies a maximum stud torque of 10–15 inch-pounds for the 1N3890R's 10-32 UNF3A threaded stud. Exceeding 15 inch-pounds risks thread damage or glass-to-metal seal fracture. Use a calibrated torque screwdriver and apply even pressure to ensure reliable thermal and electrical contact without mechanical stress.
Can the 1N3890R be used as a freewheeling diode in IGBT-based motor drives?
Yes, the 1N3890R is routinely applied as a freewheeling diode in IGBT motor drives due to its 200 ns trr, 175 A IFSM, and low RθJC. Its anode-to-stud configuration simplifies heatsinking when the IGBT collector is grounded. Ensure gate drive timing accounts for trr to avoid shoot-through during commutation.
1N3890R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-203AA, DO-4, Stud
- Packaging:
- Bulk
- Product Status:
- Active
- Technology:
- Standard, Reverse Polarity
- Voltage - DC Reverse (Vr) (Max):
- 100 V
- Current - Average Rectified (Io):
- 12A
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 20 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 150 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
1N3890R FAQ
1.How can I place an order for 1N3890R through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N3890R 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 1N3890R reliable?
The price and inventory of 1N3890R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N3890R is usually 5 days.
3.What payment methods are accepted for 1N3890R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N3890R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N3890R?
1N3890R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N3890R 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 1N3890R?
For technical support, including 1N3890R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N3890R requirements.
6.How does Aetrix verify that 1N3890R is sourced from the original manufacturer or authorized distributors?
All 1N3890R 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 1N3890R meets industry standards.
7.What is the process for return or replacement of 1N3890R?
All 1N3890R units undergo pre-shipment inspection (PSI). If there is an issue with 1N3890R, 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 1N3890R part is unused and in its original packaging.
Return procedure for 1N3890R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N3890R Tags
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