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1N4944-AP
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Product Detailed Parameters
- Description：DIODE STANDARD 400V 1A DO41
- Series：-
- Mfr：MCC (Micro Commercial Components)
- Package：Tape & Box (TB)
- Technology：Standard
- Voltage - DC Reverse (Vr) (Max)：400 V
- Current - Average Rectified (Io)：1A
- Voltage - Forward (Vf) (Max) @ If：1.3 V @ 1 A
- Speed：Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr)：150 ns
- Current - Reverse Leakage @ Vr：5 µA @ 400 V
- Capacitance @ Vr, F：15pF @ 4V, 1MHz
- Mounting Type：Through Hole
- Package / Case：DO-204AL, DO-41, Axial
- Supplier Device Package：DO-41
- Operating Temperature - Junction：-55°C ~ 150°C
- Grade：-
- Qualification：-
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Overview
The MCC 1N4944-AP is a 1.0 Amp fast recovery rectifier housed in the DO-41 axial leaded package. It features a maximum repetitive peak reverse voltage of 400V and an RMS voltage rating of 280V. The device exhibits a maximum DC blocking voltage of 400V with a typical junction capacitance of 15pF measured at 1.0MHz and 4.0V reverse bias. Electrical characteristics include a maximum instantaneous forward voltage of 1.3V at 1.0A and a maximum reverse recovery time of 150ns under specified test conditions.
Feature Summary
- Fast switching capability with low leakage current for efficient high-frequency operation
- Epoxy casing meets UL 94 V-0 flammability ratings for enhanced safety
- Lead-free finish compliant with RoHS directives
Applications
- High frequency rectification circuits
- Inverter freewheeling diodes
- Free wheeling diodes in power supplies
Procurement Notes
Verify the specific suffix to confirm packaging type, as the AP designation indicates ammo pack configuration. Ensure compliance requirements match project specifications, noting that halogen-free variants require a distinct ordering suffix. Confirm authenticity by purchasing from authorized distributors to guarantee full traceability and adherence to quality standards.
Selection Notes
Select this component when a 400V reverse voltage rating is required alongside a 1.0A average forward current capacity. The 150ns reverse recovery time makes it suitable for applications demanding faster switching speeds than standard general-purpose rectifiers. Consider thermal derating curves for ambient temperatures exceeding 55°C to maintain reliable performance within the specified operating range.
Part Context
This part belongs to the 1N4942 through 1N4948 series of fast recovery rectifiers manufactured by Micro Commercial Components. All devices in this family share identical physical dimensions and electrical parameters except for their specific voltage ratings, which range from 200V to 1000V. The series utilizes the standard DO-41 axial package for through-hole mounting.
Replacement Considerations
Direct substitutes within the same voltage class include other manufacturers' 1N4944 equivalents. Cross-referencing datasheets is necessary to verify matching reverse recovery times and forward voltage drops for circuit compatibility.
