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MCR25NG
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Product Detailed Parameters
- Description：SCR 800V 25A TO220AB
- Series：-
- Mfr：Littelfuse Inc.
- Package：Box
- Voltage - Off State：800 V
- Voltage - Gate Trigger (Vgt) (Max)：1 V
- Current - Gate Trigger (Igt) (Max)：30 mA
- Current - Hold (Ih) (Max)：40 mA
- Current - Non Rep. Surge 50, 60Hz (Itsm)：300A @ 60Hz
- SCR Type：Standard Recovery
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Through Hole
- Package / Case：TO-220-3
- Supplier Device Package：TO-220AB
- Voltage - On State (Vtm) (Max)：1.8 V
- Current - On State (It (AV)) (Max)：-
- Current - On State (It (RMS)) (Max)：25 A
- Current - Off State (Max)：10 µA
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Overview
The Littelfuse MCR25NG is a Silicon Controlled Rectifier (SCR) rated for a peak repetitive off-state voltage of 800V and an on-state RMS current of 25A. It features a high surge current capability of 300A and operates within a junction temperature range of -40°C to 125°C. The device utilizes a TO-220AB package with glass-passivated junctions and specifies minimum and maximum values for gate trigger current, gate trigger voltage, and holding current.
Feature Summary
- Designed primarily for half-wave AC control applications such as motor controls, heating controls, and power supplies.
- Features high immunity to dv/dt with a minimum rating of 100 V/µsec at 125°C.
- Includes specified minimum and maximum values for IGT, VGT, and IH to facilitate ease of design.
Applications
- Half-wave AC control circuits
- Motor controls
- Heating controls
- Power supplies
Procurement Notes
Verify the specific part number suffix against official Littelfuse documentation to confirm the exact blocking voltage rating. Ensure that thermal management requirements align with the specified junction-to-case and junction-to-ambient thermal resistance values provided in the datasheet before finalizing procurement specifications.
Selection Notes
Select the MCR25NG when an 800V blocking voltage is required alongside a 25A RMS current rating. Consider the MCR25DG or MCR25MG if lower voltage ratings of 400V or 600V are sufficient for the application. Verify that the gate drive circuit can accommodate the specified continuous DC gate trigger current range.
Part Context
The MCR25NG belongs to the MCR25DG, MCR25MG, and MCR25NG series of silicon-controlled rectifiers from Littelfuse. These devices share identical electrical characteristics except for their peak repetitive forward and reverse blocking voltages, which vary based on the middle letter in the part number.
Replacement Considerations
Direct replacements include the MCR25DG and MCR25MG, provided the application voltage does not exceed their respective 400V and 600V ratings. Other SCR components must be evaluated for matching current, voltage, and package compatibility.
FAQ
What is the critical rate of rise of off-state voltage (dv/dt) for the MCR25NG?
The MCR25NG has a minimum critical rate of rise of off-state voltage of 100 V/µsec at a junction temperature of 125°C.
What are the maximum ratings for gate power?
The forward peak gate power is 20.0 W for pulses up to 1.0 µsec, and the forward average gate power is 0.5 W for an 8.3 msec pulse width.
How is the MCR25NG packaged?
The device is housed in a rugged, economical TO-220AB package and is Pb-Free compliant.
