MikroTik TN19-0250-55 250W Replacement PSU CRS418
The MikroTik TN19-0250-55 is the official open-frame 250W replacement power supply unit for the CRS418 series rackmount switches. Rated at 55Vdc input at 4.5A, it is a direct drop-in spare for CRS418 deployments where redundant or failed PSU modules need to be replaced without taking the switch offline. MTBF is approximately 100,000 hours at 25°C.
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The MikroTik TN19-0250-55 is the factory-specified replacement PSU for the CRS418 series — including the CRS418-16G-2S+, CRS418-16G-2S+RM, and CRS418-8P-8G-2S+WiFi. When a PSU module in a live CRS418 deployment reaches end of life, trips a fault condition, or fails outright, the TN19-0250-55 is the correct replacement to restore full redundant power without replacing the switch chassis.
The CRS418 platform ships with dual PSU slots for exactly this scenario — hot-swap replacement keeps the switch online while the failed module is changed out. Keeping a TN19-0250-55 spare on-site is the minimum recommended practice for any CRS418 deployment in a production environment.
Key specifications:
- Input voltage: 55Vdc, 4.5A
- Rated output: 250W open frame
- Compatible with: CRS418 series (CRS418-16G-2S+, CRS418-16G-2S+RM, CRS418-8P-8G-2S+WiFi)
- MTBF: ~100,000 hours at 25°C
- Product code: TN19-0250-55
Note: This is a replacement spare part. It is not a standalone device and requires a compatible CRS418 series chassis.
