Weller W101, 100W Temperature Controlled Mains Soldering Iron

Weller Brand: Weller

The Weller W 101 is a 230V AC mains voltage, temperature-controlled soldering iron with an output of 100W, making it suitable for medium and heavy electrical connections to transistors, PCBs, heavy-duty connectors and sheet metal.

The temperature of the iron is controlled by a built-in 'Magnastat' thermostatic switch. As magnets are heated, their strength reduces and this principle is used to operate a spring-loaded switch, turning off the power when a certain temperature is reached and turning it back on when the iron cools down. A click can often be heard or felt when the switch operates.

The operating temperature of the iron can be changed by swapping the soldering tip. Each tip has a disc fitted to its end which touches the thermostatic switch inside the iron. Different tips have different discs to which the magnet is attracted by different amounts, changing the temperature at which the thermostat switches.

Tips with numbers ending in 7, e.g., CT6E7, cause the iron to operate at 370°C.
Tips with numbers ending in 8, e.g., CT6F8, cause the iron to operate at 425°C.
Tips with numbers ending in 9, e.g., CT6D9, cause the iron to operate at 480°C.
The number 7, 8 or 9 is stamped into the disc on the end of each tip.

A range of spare parts and tips are available to keep the W101 iron in perfect working order.

  • Operating temperature (with supplied tip) 370°C
  • A suitable stand, order code 85-5347 is available separately
  • Fitted with UK 13A mains plug
  • Supplied fitted with a CT6E7 tip, 85-5354
  • Weller type T0056104399N / W101
Tips listed for model W 101 are also suitable for the discontinued Weller model W100D 100W iron.
Description Image Product Buy Pricing (Ex VAT) Type For Use With Tip Type Tip Size Voltage Wattage Working temperature Maximum Temperature Cable Length WorkingTemperature
Weller T0056104399N W 101 Line Voltage Soldering Iron 100W 230V
Weller T0056104399N W 101 Line Voltage Soldering Iron 100W 230V
Standard range
Order code: 85-5346
MPN: T0056104399N

Out of stock10 due on 23/10/2026
1+ £95.69
5+ £94.21
Price per unit Ex VAT 		Soldering iron Screwdriver 230V 100W 1.5m 370°C
Weller T0056121699N Heater Element For W101/W100D
Weller T0056121699N Heater Element For W101/W100D
Extended range
Order code: 85-5508
MPN: T0056121699N

Available to back orderBack-order availability date - 15/08/2026
1+ £46.26
Price per unit Ex VAT 		Heating element Weller 230V 100W 370°C
Weller T0051130199N Switch Assembly For W101/W100D (SW4)
Weller T0051130199N Switch Assembly For W101/W100D (SW4)
Extended range
Order code: 85-5514
MPN: T0051130199N

Available to back orderBack-order availability date - 15/08/2026
1+ £44.03
Price per unit Ex VAT 		Switch assembly Weller 100W 370°C
Weller 4CT6C7-1 CT6 C7 Solder Tip - Chisel Tip 370°C 3.2mm
Weller 4CT6C7-1 CT6 C7 Solder Tip - Chisel Tip 370°C 3.2mm
Standard range
Order code: 85-5350
MPN: 4CT6C7-1

Despatched same day - 14 in stockAdditional quantity lead time 3 weeks
1+ £11.16
5+ £11.07
10+ £11.00
Price per unit Ex VAT 		Soldering tip Chisel 370°C
Weller 4CT6D7-1 CT6 D7 Solder Tip - Chisel Tip 370°C 5.0mm
Weller 4CT6D7-1 CT6 D7 Solder Tip - Chisel Tip 370°C 5.0mm
Standard range
Order code: 85-5352
MPN: 4CT6D7-1

Despatched same day - 4 in stockFurther 20 despatched in 4 working days
1+ £11.90
5+ £11.83
10+ £11.78
Price per unit Ex VAT 		Soldering tip Chisel 5mm 370°C 370°C
Weller 4CT6E7-1 CT6 E7 Solder Tip - Chisel Tip 370°C 7.0mm
Weller 4CT6E7-1 CT6 E7 Solder Tip - Chisel Tip 370°C 7.0mm
Standard range
Order code: 85-5354
MPN: 4CT6E7-1

Despatched same day - 12 in stockAdditional 20 due on 05/08/2026
1+ £12.03
5+ £11.95
10+ £11.87
Price per unit Ex VAT 		Soldering tip Chisel 370°C
Weller T0058716782N Handle For Irons LR 21 / TCP S / W 61 / W 101
Weller T0058716782N Handle For Irons LR 21 / TCP S / W 61 / W 101
Standard range
Order code: 85-5301
MPN: T0058716782N

Despatched same day - 10 in stockAdditional quantity lead time 3 weeks
1+ £4.37
Price per unit Ex VAT
Weller T0058716791 Flange Insulator TCP, TCP3M, TCP12V, W60D, W60E, W100D, W100E
Weller T0058716791 Flange Insulator TCP, TCP3M, TCP12V, W60D, W60E, W100D, W100E
Standard range
Order code: 85-5303
MPN: T0058716791

Despatched same day - 10 in stockAdditional quantity lead time 3 weeks
1+ £1.87
Price per unit Ex VAT
Weller T0051134399 Tip Nut For W100/101 - Pack Of 3
Weller T0051134399 Tip Nut For W100/101 - Pack Of 3
Standard range
Order code: 85-5304
MPN: T0051134399

Despatched same day - 10 in stockAdditional quantity lead time 3 weeks
1+ £10.49
Price per unit Ex VAT 		Tip retaining nut Weller CT6 series

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