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MF-R400-2-14-99
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Product Detailed Parameters
- Description：PTC RESET FUSE 30V 4A RADIAL
- Series：Multifuse®, MF-R
- Mfr：Bourns Inc.
- Package：Tape & Reel (TR)
- Type：Polymeric
- Voltage - Max：30V
- Current - Hold (Ih) (Max)：4:00 AM
- Current - Trip (It)：8:00 AM
- Current - Max：40 A
- Time to Trip：12.7 s
- Resistance - Initial (Ri) (Min)：10 mOhms
- Resistance - Post Trip (R1) (Max)：50 mOhms
- Resistance - 25°C (Typ)：-
- Operating Temperature：-40°C ~ 85°C
- Grade：-
- Qualification：-
- Ratings：-
- Mounting Type：Through Hole
- Package / Case：Radial, Disc
- Size / Dimension：0.567" L x 0.118" W (14.40mm x 3.00mm)
- Height - Seated (Max)：0.976" (24.80mm)
- Thickness (Max)：-
- Lead Spacing：0.201" (5.10mm)
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Overview
The MF-R400-2-14-99 is a polymeric PTC resettable fuse manufactured by Bourns, Inc. It features a radial through-hole package with a disc shape. The component operates at a maximum voltage of 30V and has a hold current of 4A. It supports a maximum trip current of 40A and exhibits a time to trip of 12.7 seconds. The device has a maximum seated height of 0.976 inches (24.80mm).
Feature Summary
- Polymeric construction for reliable circuit protection.
- Radial leaded configuration for through-hole mounting.
- Compact disc-shaped design suitable for space-constrained applications.
Applications
- Overcurrent protection in electronic circuits.
- Circuit protection for professional audio equipment components.
- Protection within power supply systems requiring resettable fusing.
Procurement Notes
Verify the specific suffix -99 against official Bourns documentation to confirm exact packaging or reel specifications. Ensure the selected variant matches the required radial lead form factor and disc shape for your PCB layout. Cross-reference the 30V and 4A ratings with your system's operational limits to guarantee adequate protection margins.
Selection Notes
Select this component when a resettable overcurrent solution is required for low-voltage DC circuits up to 30V. The 4A hold current defines the continuous operating limit, while the 40A trip current indicates the threshold for rapid resistance increase. Consider the 12.7-second trip time for coordination with other protective devices in the circuit design.
Part Context
This part belongs to the MF-R series of polymeric PTC resettable fuses from Bourns, Inc. These components are designed to provide reusable overcurrent protection, replacing traditional one-time fuses. The series offers various current ratings and package options to suit different industrial and consumer electronics applications.
Replacement Considerations
MF-R400-2-14 is a related variant within the same product family. Verify if the -99 suffix denotes a specific packaging difference such as tape and reel versus bulk, as functional electrical parameters remain consistent across these suffixes.
