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RTO20 & RTO50 Power Resistors

Vishay / Sfernice RTO20 and RTO50 Power Resistors are thick film medium power resistors with energy ratings for harsh pulses up to 60J/0.1s. These power resistors provide high power for long precharge / discharge up to 150W at 45°C and high dielectric strength for protection up to 3000V_RMS. RTO20 resistors feature a high power dissipation-to-size ratio, a wide resistance range from 0.01Ω to 550kΩ, heat sink mounted, and negligible inductance. The RTO50 series features a high power-to-size ratio, ohmic value adjustment by sand trimming, led or surface mount versions, and non-inductive elements. Vishay / Sfernice RTO20 and RTO50 Power Resistors' applications include AMS, industrial, and automotive uses. The RTO 20W/50W are AEC-Q200 qualified.

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (GBP) Filter the results in the table by unit price based on your quantity.	Qty.	Termination Style	Resistance	Power Rating	Tolerance	Temperature Coefficient	Case Code - in	Case Code - mm
Thick Film Resistors - Through Hole 20watts 10Kohms 5% RTO020F10001JTE3 Vishay / Sfernice 1: £7.39 138In Stock	Mfr. Part No. RTO020F10001JTE3 Mouser Part No 72-RTO20F-10K-5	Vishay / Sfernice	Thick Film Resistors - Through Hole 20watts 10Kohms 5% Learn More about Vishay / Sfernice vishay sfernice rto20 50 power resistors	Datasheet	138In Stock	£7.39 £5.96 £5.63 £5.62 View £5.12 £5.04 £4.97	Min.: 1 Mult.: 1	Radial	10 kOhms	20 W	5 %	150 PPM / C
Thick Film Resistors - Through Hole 20watts 2.2ohms 5% NON-STANDARD RTO020F2R200JTE3 Vishay / Sfernice 1: £7.65 64In Stock	Mfr. Part No. RTO020F2R200JTE3 Mouser Part No 72-RTO20F-2.2-5	Vishay / Sfernice	Thick Film Resistors - Through Hole 20watts 2.2ohms 5% NON-STANDARD Learn More about Vishay / Sfernice vishay sfernice rto20 50 power resistors	Datasheet	64In Stock	£7.65 £6.19 £5.85 £5.84 View £5.49 £5.33 £5.31	Min.: 1 Mult.: 1	Radial	2.2 Ohms	20 W	5 %	150 PPM / C
Thick Film Resistors - Through Hole 20watts 22ohms 5% NON-STANDARD RTO020F22R00JTE3 Vishay / Sfernice 1: £6.28 142In Stock	Mfr. Part No. RTO020F22R00JTE3 Mouser Part No 72-RTO20F-22-5	Vishay / Sfernice	Thick Film Resistors - Through Hole 20watts 22ohms 5% NON-STANDARD Learn More about Vishay / Sfernice vishay sfernice rto20 50 power resistors	Datasheet	142In Stock	£6.28 £5.83 £5.31	Min.: 1 Mult.: 1	Radial	22 Ohms	20 W	5 %	150 PPM / C
Thick Film Resistors - Through Hole 20watts 3.9ohms 5% NON-STANDARD RTO020F3R900JTE3 Vishay / Sfernice 1: £7.48 32In Stock	Mfr. Part No. RTO020F3R900JTE3 Mouser Part No 72-RTO20F-3.9-5	Vishay / Sfernice	Thick Film Resistors - Through Hole 20watts 3.9ohms 5% NON-STANDARD Learn More about Vishay / Sfernice vishay sfernice rto20 50 power resistors	Datasheet	32In Stock	£7.48 £6.01 £5.83 £5.32 £5.31	Min.: 1 Mult.: 1	Radial	3.9 Ohms	20 W	5 %	150 PPM / C
Thick Film Resistors - Through Hole 20watts 330ohms 5% NON-STANDARD RTO020F330R0JTE3 Vishay / Sfernice 1: £7.22 129In Stock	Mfr. Part No. RTO020F330R0JTE3 Mouser Part No 72-RTO20F-330-5	Vishay / Sfernice	Thick Film Resistors - Through Hole 20watts 330ohms 5% NON-STANDARD Learn More about Vishay / Sfernice vishay sfernice rto20 50 power resistors	Datasheet	129In Stock	£7.22 £6.96 £6.58 £5.72 View £5.67 £5.39 £5.33 £5.28 Quote	Min.: 1 Mult.: 1	Radial	330 Ohms	20 W	5 %	150 PPM / C
Thick Film Resistors - Through Hole 20watts 4.7Kohms 5% RTO020F47000JTE3 Vishay / Sfernice 1: £7.65 75In Stock	Mfr. Part No. RTO020F47000JTE3 Mouser Part No 72-RTO20F-4.7K-5	Vishay / Sfernice	Thick Film Resistors - Through Hole 20watts 4.7Kohms 5% Learn More about Vishay / Sfernice vishay sfernice rto20 50 power resistors	Datasheet	75In Stock	£7.65 £6.19 £5.85 £5.65 View £5.49 £5.33 £5.24 £5.17	Min.: 1 Mult.: 1	Radial	4.7 kOhms	20 W	5 %	150 PPM / C
Thick Film Resistors - Through Hole 20watts 500Kohms 5% RTO020F50002JTE3 Vishay / Sfernice 1: £8.08 13In Stock 50Expected 24/09/2026	Mfr. Part No. RTO020F50002JTE3 Mouser Part No 72-RTO20F-500K-5	Vishay / Sfernice	Thick Film Resistors - Through Hole 20watts 500Kohms 5% Learn More about Vishay / Sfernice vishay sfernice rto20 50 power resistors	Datasheet	13In Stock 50Expected 24/09/2026	£8.08 £7.87 £7.46 £6.51 View £5.84 £5.83	Min.: 1 Mult.: 1	Radial	500 kOhms	20 W	5 %	150 PPM / C
Thick Film Resistors - Through Hole 20watts 680ohms 5% NON-STANDARD RTO020F680R0JTE3 Vishay / Sfernice 1: £6.15 44In Stock 100Expected 23/10/2026	Mfr. Part No. RTO020F680R0JTE3 Mouser Part No 72-RTO20F-680-5	Vishay / Sfernice	Thick Film Resistors - Through Hole 20watts 680ohms 5% NON-STANDARD Learn More about Vishay / Sfernice vishay sfernice rto20 50 power resistors	Datasheet	44In Stock 100Expected 23/10/2026	£6.15 £5.83 £5.35 £5.31	Min.: 1 Mult.: 1	Radial	680 Ohms	20 W	5 %	150 PPM / C
Thick Film Resistors - Through Hole 50watts 1ohm 5% RTO050F1R000JTE1 Vishay / Sfernice 1: £11.31 100In Stock	Mfr. Part No. RTO050F1R000JTE1 Mouser Part No 72-RTO50F-1-5	Vishay / Sfernice	Thick Film Resistors - Through Hole 50watts 1ohm 5% Learn More about Vishay / Sfernice vishay sfernice rto20 50 power resistors	Datasheet	100In Stock	£11.31 £8.21 £8.20 £7.96 View £7.31 £6.42 £6.21	Min.: 1 Mult.: 1	Radial	1 Ohms	50 W	5 %	150 PPM / C
Thick Film Resistors - Through Hole 50watts 10ohms 5% RTO050F10R00JTE1 Vishay / Sfernice 1: £7.43 47In Stock 2,000Expected 03/06/2027	Mfr. Part No. RTO050F10R00JTE1 Mouser Part No 72-RTO50F-10-5	Vishay / Sfernice	Thick Film Resistors - Through Hole 50watts 10ohms 5% Learn More about Vishay / Sfernice vishay sfernice rto20 50 power resistors	Datasheet	47In Stock 2,000Expected 03/06/2027	£7.43 £6.00 £5.67 £5.47 View £5.32 £5.16 £5.00 Quote	Min.: 1 Mult.: 1	Radial	10 Ohms	50 W	5 %	150 PPM / C
Thick Film Resistors - Through Hole 50watts 100ohms 5% RTO050F100R0JTE1 Vishay / Sfernice 1: £8.32 123In Stock 100Expected 01/10/2026	Mfr. Part No. RTO050F100R0JTE1 Mouser Part No 72-RTO50F-100-5	Vishay / Sfernice	Thick Film Resistors - Through Hole 50watts 100ohms 5% Learn More about Vishay / Sfernice vishay sfernice rto20 50 power resistors	Datasheet	123In Stock 100Expected 01/10/2026	£8.32 £6.77 £6.42 £6.20 View £5.88 £5.77 £5.64	Min.: 1 Mult.: 1	Radial	100 Ohms	50 W	5 %	150 PPM / C
Thick Film Resistors - Through Hole 50watts 1Kohms 5% RTO050F10000JTE1 Vishay / Sfernice 1: £8.23 85In Stock	Mfr. Part No. RTO050F10000JTE1 Mouser Part No 72-RTO50F-1K-5	Vishay / Sfernice	Thick Film Resistors - Through Hole 50watts 1Kohms 5% Learn More about Vishay / Sfernice vishay sfernice rto20 50 power resistors	Datasheet	85In Stock	£8.23 £6.70 £6.69 £6.20 View £5.81 £5.71 £5.64	Min.: 1 Mult.: 1	Radial	1 kOhms	50 W	5 %	150 PPM / C
Thick Film Resistors - Through Hole 50W 12ohm 5% RTO050F12R00JTE1 Vishay / Sfernice 1: £8.34 2,158On Order	Mfr. Part No. RTO050F12R00JTE1 Mouser Part No 72-RTO050F12R00JTE1	Vishay / Sfernice	Thick Film Resistors - Through Hole 50W 12ohm 5% Learn More about Vishay / Sfernice vishay sfernice rto20 50 power resistors	Datasheet	2,158On Order On Order Ship Dates Mfr. No: RTO050F12R00JTE1 Stock: 0 On Order: 158 Expected 24/09/2026 1,000 Expected 15/10/2026 1,000 Expected 17/12/2026 Factory Lead Time: 12 Weeks	£8.34 £6.68 £6.40 £5.98 View £5.84 £5.74 £5.17 Quote	Min.: 1 Mult.: 1	Radial	12 Ohms	50 W	5 %	150 PPM / C
Thick Film Resistors - Through Hole 20W .015ohms 1% RTO020FR0150FTE3 Vishay / Sfernice 1: £13.91 100On Order	Mfr. Part No. RTO020FR0150FTE3 Mouser Part No 72-RTO020FR0150FTE3	Vishay / Sfernice	Thick Film Resistors - Through Hole 20W .015ohms 1% Learn More about Vishay / Sfernice vishay sfernice rto20 50 power resistors	Datasheet	100On Order	£13.91 £13.61 £13.39 £12.03 £10.94	Min.: 1 Mult.: 1	Radial	15 mOhms	20 W	1 %	150 PPM / C
Thick Film Resistors - Through Hole 50wattts RTO050F15R00JTE1 Vishay / Sfernice 1: £9.01 196Expected 01/10/2026	Mfr. Part No. RTO050F15R00JTE1 Mouser Part No 72-RTO050F15R00JTE1	Vishay / Sfernice	Thick Film Resistors - Through Hole 50wattts Learn More about Vishay / Sfernice vishay sfernice rto20 50 power resistors	Datasheet	196Expected 01/10/2026	£9.01 £7.39 £7.01 £6.78 View £6.62 £6.43 £5.98 £5.72 Quote	Min.: 1 Mult.: 1	Radial	15 Ohms	50 W	5 %	150 PPM / C
Thick Film Resistors - Through Hole 50W 330ohm 5% RTO050F330R0JTE1 Vishay / Sfernice 1: £8.21 205On Order	Mfr. Part No. RTO050F330R0JTE1 Mouser Part No 72-RTO050F330R0JTE1	Vishay / Sfernice	Thick Film Resistors - Through Hole 50W 330ohm 5% Learn More about Vishay / Sfernice vishay sfernice rto20 50 power resistors	Datasheet	205On Order On Order Ship Dates Mfr. No: RTO050F330R0JTE1 Stock: 0 On Order: 5 Expected 01/10/2026 100 Expected 24/11/2026 100 Expected 10/12/2026 Factory Lead Time: 12 Weeks	£8.21 £7.94 £7.79 £6.84 View £6.68 £6.21	Min.: 1 Mult.: 1	Radial	330 Ohms	50 W	5 %	150 PPM / C
Thick Film Resistors - Through Hole 20W 12ohm 5% RTO020F12R00JTE3 Vishay / Sfernice 1: £7.64 100Expected 24/09/2026	Mfr. Part No. RTO020F12R00JTE3 Mouser Part No 72-RTO020F12R00JTE3	Vishay / Sfernice	Thick Film Resistors - Through Hole 20W 12ohm 5% Learn More about Vishay / Sfernice vishay sfernice rto20 50 power resistors	Datasheet	100Expected 24/09/2026	£7.64 £6.17 £5.83 £5.63 View £5.48 £5.33 £5.12 £4.83	Min.: 1 Mult.: 1	Radial	12 Ohms	20 W	5 %	150 PPM / C
Thick Film Resistors - Through Hole RTO 20 F 2U7 5% TU50 e3 RTO020F2R700JTE3 Vishay / Sfernice 1: £11.13 50Expected 19/11/2026	Mfr. Part No. RTO020F2R700JTE3 Mouser Part No 72-RTO020F2R700JTE3	Vishay / Sfernice	Thick Film Resistors - Through Hole RTO 20 F 2U7 5% TU50 e3 Learn More about Vishay / Sfernice vishay sfernice rto20 50 power resistors	Datasheet	50Expected 19/11/2026	£11.13 £7.68 £7.67 £6.80 View £6.18 £5.87 £5.84 £5.75 Quote	Min.: 1 Mult.: 1	Radial	2.7 Ohms	20 W	5 %	150 PPM / C
Thick Film Resistors - Through Hole RTO 20 F 4U7 1% TU50 e3 RTO020F4R700FTE3 Vishay / Sfernice 1: £15.57 50Expected 06/10/2026	Mfr. Part No. RTO020F4R700FTE3 Mouser Part No 72-RTO020F4R700FTE3	Vishay / Sfernice	Thick Film Resistors - Through Hole RTO 20 F 4U7 1% TU50 e3 Learn More about Vishay / Sfernice vishay sfernice rto20 50 power resistors	Datasheet	50Expected 06/10/2026	£15.57 £10.99 £10.98 £10.21 View £9.27 £8.64 £8.51 £8.48 Quote	Min.: 1 Mult.: 1	Radial	4.7 Ohms	20 W	1 %	150 PPM / C
Thick Film Resistors - Through Hole RTO 50 F 1U 1% TU50 e1 RTO050F1R000FTE1 Vishay / Sfernice 1: £18.20 40Expected 29/10/2026	Mfr. Part No. RTO050F1R000FTE1 Mouser Part No 72-RTO050F1R000FTE1	Vishay / Sfernice	Thick Film Resistors - Through Hole RTO 50 F 1U 1% TU50 e1	Datasheet	40Expected 29/10/2026	£18.20 £12.84 £11.61 £10.85 View £10.11 £9.94 £9.88 Quote	Min.: 1 Mult.: 1	Radial	1 Ohms	50 W	1 %	150 PPM / C
Thick Film Resistors - Through Hole RTO 50 F 2K7 5% TU50 e1 RTO050F27000JTE1 Vishay / Sfernice 1: £13.16 50Expected 24/09/2026	Mfr. Part No. RTO050F27000JTE1 Mouser Part No 72-RTO050F27000JTE1	Vishay / Sfernice	Thick Film Resistors - Through Hole RTO 50 F 2K7 5% TU50 e1	Datasheet	50Expected 24/09/2026	£13.16 £10.40 £9.10 £7.96 View £7.23 £7.06 £7.05 £6.95 Quote	Min.: 1 Mult.: 1	Radial	2.7 kOhms	50 W	5 %	150 PPM / C
Thick Film Resistors - Through Hole RTO 50 F 3U74 1% TU50 e1 RTO050F3R740FTE1 Vishay / Sfernice 1: £20.02 45Expected 15/10/2026	Mfr. Part No. RTO050F3R740FTE1 Mouser Part No 72-RTO050F3R740FTE1	Vishay / Sfernice	Thick Film Resistors - Through Hole RTO 50 F 3U74 1% TU50 e1	Datasheet	45Expected 15/10/2026	£20.02 £14.47 £12.29 £11.93 View £11.17 £11.06 Quote	Min.: 1 Mult.: 1	Radial	3.74 Ohms	50 W	1 %	150 PPM / C
Thick Film Resistors - Through Hole 50watts 1.5Kohms 5% RTO050F15000JTE1 Vishay / Sfernice 1: £9.71 50Expected 29/10/2026	Mfr. Part No. RTO050F15000JTE1 Mouser Part No 72-RTO50F-1.5K-5	Vishay / Sfernice	Thick Film Resistors - Through Hole 50watts 1.5Kohms 5% Learn More about Vishay / Sfernice vishay sfernice rto20 50 power resistors	Datasheet	50Expected 29/10/2026	£9.71 £8.00 £7.60 £7.38 View £7.18 £6.80 £6.70 £6.55 Quote	Min.: 1 Mult.: 1	Radial	1.5 kOhms	50 W	5 %	150 PPM / C
Thick Film Resistors - Through Hole RTO 50 F 51U 5% TU50 e1 RTO050F51R00JTE1 Vishay / Sfernice 1: £9.03 Non-Stocked Lead-Time 12 Weeks	Mfr. Part No. RTO050F51R00JTE1 Mouser Part No 71-RTO050F51R00JTE1	Vishay / Sfernice	Thick Film Resistors - Through Hole RTO 50 F 51U 5% TU50 e1	Datasheet	Non-Stocked Lead-Time 12 Weeks	£9.03 £7.36 £6.98 £6.97 View £6.57 £6.39 £6.25 £6.21	Min.: 1 Mult.: 1	Radial	51 Ohms	50 W	5 %	150 PPM / C
Thick Film Resistors - SMD RTO 20 C 2U4 5% TU50 e3 RTO020C2R400JTE3 Vishay / Sfernice 1: £11.69 Non-Stocked Lead-Time 10 Weeks	Mfr. Part No. RTO020C2R400JTE3 Mouser Part No 72-RTO020C2R400JTE3	Vishay / Sfernice	Thick Film Resistors - SMD RTO 20 C 2U4 5% TU50 e3 Learn More about Vishay / Sfernice vishay sfernice rto20 50 power resistors	Datasheet	Non-Stocked Lead-Time 10 Weeks	£11.69 £8.07 £7.15 £6.56 View £6.45 £6.43 £6.34	Min.: 1 Mult.: 1	SMD/SMT	2.4 Ohms	20 W	5 %	150 PPM / C	TO-220-2 Flat Lead	TO-220-2 Flat Lead

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4.32 mOhms
10 mOhms
15 mOhms
20 mOhms
25 mOhms
33 mOhms
40 mOhms
46 mOhms
50 mOhms
62 mOhms
68 mOhms
91 mOhms
95 mOhms
100 mOhms
120 mOhms
150 mOhms
180 mOhms
200 mOhms
220 mOhms
270 mOhms