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Cooper Bussmann KW Series Supercapacitors

KW Series Coin Cell Supercapacitors using electrochemical double layer capacitors creating unique, ultra-high capacitance devices.

  • Smallest available -40-85⁰C rated product
  • Excellent operating life –1000hrs @85⁰C
  • Ultra-high Capacitance
  • Low leakage current
Cooper Bussman KW Series Supercapacitors
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Product Description

Cooper Bussmann PowerStor KW Series Coin Cell Supercapacitors are unique, offering a wide range of high capacitance coin cell style products for use in memory and RTC back-up applications.

Ideal for RTC back-up, electric utility meters, motor control units and solar inverters the KW Series has a proven 20 year lifespan and is the smallest coin cell product available able to operate between -40⁰ to 85⁰C with the lowest ESR and a footprint ranging from 13.5mm x 5mm with a height of 8.3mm to 21.5mm x 5mm and a height of 9mm. With their wide temperature range and amazing lifespan KW Series Supercapacitors make for ideal maintenance free battery replacements.

Tiny Footprint

Ranging from 13.5mm x 5mm with a height of 8.3mm to 21.5mm x 5mm and a height of 9mm make the KW Series ideal battery replacements for small spaces.

Extraordinary Lifespan

Operating life of over 1000 hours at 85⁰C, providing a 20 year operating life.

Eco-Friendly

RoHS Compliant, Halogen & Lead Free for a friendlier environment.

Product Series
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  Manufacturer Part No Order Code Manufacturer / Description
Availability Price For
 Price
 Quantity
 Capacitance Voltage(DC) Capacitor Terminals Capacitance Tolerance Lead Spacing Lifetime @ Temperature Capacitor Case / Package Capacitor Mounting ESR Product Diameter Product Length Product Width Product Height Product Range Operating Temperature Min Operating Temperature Max Qualification
KW-5R5C105-R
KW-5R5C105-R - Supercapacitor, PowerStor®, EDLC, 1 F, 5.5 V, Radial Leaded, -20%, +80%, 5 mm, 2000 hours @ 85°C

2302170

Data Sheet
+
RoHS

Supercapacitor, PowerStor®, EDLC, 1 F, 5.5 V, Radial Leaded, -20%, +80%, 5 mm, 2000 hours @ 85°C

EATON ELECTRONICS

You previously purchased this product. View in Order History

1,916 in stock + Check Stock & Lead Times

1,916 in stock for next day delivery (UK stock)

More stock available week commencing 20/07/26

Each

1+ £6.27 £7.52 10+ £5.64 £6.77

Restricted Item

Minimum order of 1 items Multiples of 1 only Please enter a valid quantity

Add
Min: 1 Mult: 1
1F 5.5V Radial Leaded -20%, +80% 5mm 2000 hours @ 85°C Coin Through Hole 30ohm 21.5mm - - 8.85mm KW Series -40°C 85°C -
KW-5R5C224-R
KW-5R5C224-R - Supercapacitor, PowerStor®, EDLC, 0.22 F, 5.5 V, Radial Leaded, -20%, +80%, 5 mm, 2000 hours @ 85°C

2302171

Data Sheet
+
RoHS

Supercapacitor, PowerStor®, EDLC, 0.22 F, 5.5 V, Radial Leaded, -20%, +80%, 5 mm, 2000 hours @ 85°C

EATON ELECTRONICS

You previously purchased this product. View in Order History

965 in stock + Check Stock & Lead Times

965 in stock for next day delivery (UK stock)

  • 400 more will be available week commencing 10/07/26

    • More stock available week commencing 20/07/26

    Each

    1+ £2.59 £3.11 10+ £2.33 £2.80

    Restricted Item

    Minimum order of 1 items Multiples of 1 only Please enter a valid quantity

    Add
    Min: 1 Mult: 1
    		0.22F 5.5V Radial Leaded -20%, +80% 5mm 2000 hours @ 85°C Coin Through Hole 50ohm 13.5mm - - 8.3mm KW Series -40°C 85°C -
    KW-5R5C334-R
    KW-5R5C334-R - Supercapacitor, PowerStor®, EDLC, 0.33 F, 5.5 V, Radial Leaded, -20%, +80%, 5 mm, 2000 hours @ 85°C

    2302173

    Data Sheet
    +
    RoHS

    Supercapacitor, PowerStor®, EDLC, 0.33 F, 5.5 V, Radial Leaded, -20%, +80%, 5 mm, 2000 hours @ 85°C

    EATON ELECTRONICS

    You previously purchased this product. View in Order History

    51 in stock + Check Stock & Lead Times

    51 in stock for next day delivery (UK stock)

  • 1,200 more will be available week commencing 29/05/26
  • 400 more will be available week commencing 12/06/26
  • 400 more will be available week commencing 26/06/26
  • 800 more will be available week commencing 10/07/26

    • More stock available week commencing 20/07/26

    Each

    1+ £2.59 £3.11 10+ £2.33 £2.80

    Restricted Item

    Minimum order of 1 items Multiples of 1 only Please enter a valid quantity

    Add
    Min: 1 Mult: 1
    		0.33F 5.5V Radial Leaded -20%, +80% 5mm 2000 hours @ 85°C Coin Through Hole 50ohm 13.5mm - - 8.3mm KW Series -40°C 85°C -
    KW-5R5C684-R
    KW-5R5C684-R - Supercapacitor, PowerStor®, EDLC, 0.68 F, 5.5 V, Radial Leaded, -20%, +80%, 5 mm, 2000 hours @ 85°C

    2302174

    Data Sheet
    +
    RoHS

    Supercapacitor, PowerStor®, EDLC, 0.68 F, 5.5 V, Radial Leaded, -20%, +80%, 5 mm, 2000 hours @ 85°C

    EATON ELECTRONICS

    You previously purchased this product. View in Order History

    298 in stock + Check Stock & Lead Times

    298 in stock for next day delivery (UK stock)

    More stock available week commencing 20/07/26

    Each

    1+ £4.81 £5.77 10+ £4.33 £5.20

    Restricted Item

    Minimum order of 1 items Multiples of 1 only Please enter a valid quantity

    Add
    Min: 1 Mult: 1
    		0.68F 5.5V Radial Leaded -20%, +80% 5mm 2000 hours @ 85°C Coin Through Hole 30ohm 21.5mm - - 8.85mm KW Series -40°C 85°C -