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Resistors / Non-linear Resistors / RKEF400
Datasheets
RKEF400 by:

PTC Resettable Fuse, Through Hole Mount, RADIAL LEADED, ROHS COMPLIANT

Part Details for RKEF400 by Littelfuse Inc

Results Overview of RKEF400 by Littelfuse Inc

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RKEF400 Information

RKEF400 by Littelfuse Inc is a Non-linear Resistor.
Non-linear Resistors are under the broader part category of Resistors.

Resistors are passive components that work by limiting electron flow in a circuit. They are available as fixed or as variable (potentionmeters). Read more about Resistors on our Resistors part category page.

Price & Stock for RKEF400

Part # Distributor Description Stock Price Buy
DISTI # 45P8095
Newark Pptc Resettable Fuse, 4A, 60Vdc, Th, Product Range:Polyswitch Rkef Series, Voltage Rating:60Vdc, Holding Current:4A, Trip Current:8A, Time To Trip:24S, Fuse Shape:Rectangular, Current Rating Max:40A, Lead Spacing:10.9Mm, Diameter:- Rohs Compliant: Yes |Littelfuse RKEF400 RoHS: Compliant Min Qty: 1 Package Multiple: 1 Date Code: 1 Container: Bulk 2
  • 1 $1.0600
  • 10 $0.8220
  • 25 $0.7510
  • 50 $0.6830
  • 100 $0.6020
  • 500 $0.5280
  • 1,000 $0.4540
  • 2,500 $0.4190
$0.4190 / $1.0600 Buy Now
DISTI # 38AC2247
Newark Fuse, Resettable Ptc, 60Vdc, 4A, Thd, Thermistor Mounting:Through Hole, Product Range:Polyswitch Rkef Series, Holding Current:4A, Tripping Current:8A, Voltage Rating:60Vdc, Operating Temperature Min:-40°C, Operating Temperature Rohs Compliant: Yes |Littelfuse RKEF400 RoHS: Compliant Min Qty: 1 Package Multiple: 1 Date Code: 1 Container: Bulk 0
  • 1 $0.8230
  • 10 $0.7500
  • 25 $0.5810
  • 50 $0.5360
  • 100 $0.4900
  • 500 $0.4300
$0.4300 / $0.8230 Buy Now
DISTI # RKEF400HF-ND
DigiKey PTC RESET FUSE 60V 4A RADIAL Min Qty: 1 Lead time: 15 Weeks Container: Bag 4801
In Stock
  • 1 $0.9600
  • 5 $0.7960
  • 10 $0.7340
  • 50 $0.6092
  • 100 $0.5621
  • 250 $0.5052
  • 500 $0.4659
  • 1,000 $0.4295
  • 5,000 $0.3708
$0.3708 / $0.9600 Buy Now
DISTI # 650-RKEF400
Mouser Electronics Resettable Fuses - PPTC 60V 40A 3.70W Radial-leaded Device RoHS: Compliant 0
  • 1 $0.9600
  • 5 $0.7960
  • 10 $0.7330
  • 50 $0.6100
  • 100 $0.5630
  • 250 $0.5060
  • 500 $0.4660
  • 1,000 $0.4300
  • 2,500 $0.3710
$0.3710 / $0.9600 Order Now
DISTI # V99:2348_11453917
Arrow Electronics PTC Resettable Fuse 4A(hold) 8A(trip) 60V 40A 3.7W 24s 0.014Ohm Radial 21 X 3 X 24.9mm Bag RoHS: Compliant Min Qty: 1 Package Multiple: 1 Lead time: 15 Weeks Date Code: 2305 Americas - 191
  • 1 $0.5663
  • 10 $0.5404
  • 25 $0.4858
  • 100 $0.4227
  • 500 $0.4001
  • 1,000 $0.3764
$0.3764 / $0.5663 Buy Now
DISTI # V79:2366_23574464
Arrow Electronics PTC Resettable Fuse 4A(hold) 8A(trip) 60V 40A 3.7W 24s 0.014Ohm Radial 21 X 3 X 24.9mm Bag RoHS: Compliant Min Qty: 1 Package Multiple: 1 Date Code: 1838 Americas - 164
  • 1 $0.5710
  • 10 $0.5411
  • 25 $0.4795
  • 100 $0.4103
  • 500 $0.3862
  • 1,000 $0.3291
$0.3291 / $0.5710 Buy Now
DISTI # P40:2555_12733152
Arrow Electronics PTC Resettable Fuse 4A(hold) 8A(trip) 60V 40A 3.7W 24s 0.014Ohm Radial 21 X 3 X 24.9mm Bag RoHS: Compliant Min Qty: 1 Package Multiple: 1 Lead time: 98 Weeks Date Code: 2326 Europe - 146
  • 1 $0.6942
  • 10 $0.6464
  • 25 $0.5526
  • 100 $0.4549
  • 500 $0.4226
  • 1,000 $0.3565
$0.3565 / $0.6942 Buy Now
DISTI # 63455561
Verical PTC Resettable Fuse 4A(hold) 8A(trip) 60V 40A 3.7W 24s 0.014Ohm Radial 21 X 3 X 24.9mm Bag RoHS: Compliant Min Qty: 109 Package Multiple: 1 Date Code: 2201 Americas - 607
  • 109 $0.5509
$0.5509 Buy Now
DISTI # 86216262
Verical PTC Resettable Fuse 4A(hold) 8A(trip) 60V 40A 3.7W 24s 0.014Ohm Radial 21 X 3 X 24.9mm Bag RoHS: Compliant Min Qty: 15 Package Multiple: 1 Date Code: 2305 Americas - 191
  • 15 $0.5663
$0.5663 Buy Now
DISTI # 83643921
Verical PTC Resettable Fuse 4A(hold) 8A(trip) 60V 40A 3.7W 24s 0.014Ohm Radial 21 X 3 X 24.9mm Bag RoHS: Compliant Min Qty: 19 Package Multiple: 1 Date Code: 1838 Americas - 164
  • 19 $0.5411
  • 25 $0.4795
  • 100 $0.4103
  • 500 $0.3862
  • 1,000 $0.3291
$0.3291 / $0.5411 Buy Now
DISTI # RKEF400
TTI Resettable Fuses - PPTC 60V 40A 3.70W Radial-leaded Device RoHS: Compliant pbFree: Pb-Free Min Qty: 25 Package Multiple: 25 Container: Bulk Americas - 1425
In Stock
  • 25 $0.6640
  • 50 $0.6090
  • 100 $0.5140
  • 200 $0.5040
  • 500 $0.4940
$0.4940 / $0.6640 Buy Now
ComSIT USA Electronic Component RoHS: Compliant Stock DE - 0
Stock ES - 189
Stock US - 0
Stock MX - 0
Stock CN - 0
Stock HK - 0
RFQ
DISTI # SMC-RKEF400
Sensible Micro Corporation OEM Excess 5-7 Days Leadtime, We are an AS6081 Certified Vendor, 1 Yr Warranty RoHS: Not Compliant Min Qty: 25 Lead time: 2 Weeks, 0 Days 357
RFQ

Part Details for RKEF400

RKEF400 Part Data Attributes

Parametric Data
RKEF400 Littelfuse Inc
Buy Now Datasheet
Compare Parts:
RKEF400 Littelfuse Inc PTC Resettable Fuse, Through Hole Mount, RADIAL LEADED, ROHS COMPLIANT
Pbfree Code Yes
Rohs Code Yes
Part Life Cycle Code Active
Ihs Manufacturer LITTELFUSE INC
Package Description RADIAL LEADED
Reach Compliance Code compliant
ECCN Code EAR99
HTS Code 8533.40.80.70
Samacsys Manufacturer LITTELFUSE
Additional Feature Rmin@25 Deg Cel
Mounting Feature THROUGH HOLE MOUNT
Number of Terminals 2
Operating Temperature-Max 85 °C
Operating Temperature-Min -40 °C
Package Height 24.9 mm
Package Length 21 mm
Package Shape RECTANGULAR PACKAGE
Package Style Radial
Package Width 3 mm
Packing Method BULK
Reference Standard CSA; TUV; UL
Resistance 0.014 Ω
Resistor Type PTC RESETTABLE FUSE
Surface Mount NO
Terminal Placement RADIAL
Terminal Shape WIRE
Thermistor Application OVERCURRENT PROTECTION
Working Voltage 60 V

RKEF400 Related Parts

RKEF400 Frequently Asked Questions (FAQ)

  • A good PCB layout for the RKEF400 involves keeping the input and output traces separate, using a ground plane, and minimizing the length of the input and output traces to reduce parasitic inductance and capacitance.

  • Proper cooling of the RKEF400 can be achieved by providing adequate airflow, using a heat sink, and ensuring good thermal conductivity between the device and the heat sink. The datasheet provides thermal resistance values to help with thermal design.

  • Exceeding the maximum ratings of the RKEF400 can lead to reduced lifespan, permanent damage, or even catastrophic failure. It is essential to ensure that the device operates within the specified maximum ratings to ensure reliable operation.

  • Troubleshooting issues with the RKEF400 involves checking the input and output voltages, ensuring proper PCB layout, and verifying that the device is operating within the specified maximum ratings. A systematic approach to troubleshooting can help identify and resolve issues quickly.

  • Yes, the RKEF400 is a high-frequency device and requires proper EMI/EMC design considerations, such as using shielding, filtering, and proper grounding to minimize electromagnetic interference and ensure compliance with regulatory requirements.

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