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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
Thick Film Resistors - Through Hole 50W 47ohm 5% RTO050F47R00JTE1 Vishay / Sfernice 1: £8.85 569In Stock 800Expected 22/12/2026	Mfr. Part No. RTO050F47R00JTE1 Mouser Part No 72-RTO050F47R00JTE1	Vishay / Sfernice	Thick Film Resistors - Through Hole 50W 47ohm 5% Learn More about Vishay / Sfernice vishay sfernice rto20 50 power resistors	Datasheet	569In Stock 800Expected 22/12/2026	£8.85 £7.03 £6.87 £6.79 View £6.63 £6.44 £5.97 £5.38 Quote	Min.: 1 Mult.: 1	Radial	47 Ohms	50 W	5 %	150 PPM / C
Thick Film Resistors - Through Hole 50W 4.7ohm 5% RTO050F4R700JTE1 Vishay / Sfernice 1: £7.25 712In Stock	Mfr. Part No. RTO050F4R700JTE1 Mouser Part No 72-RTO050F4R700JTE1	Vishay / Sfernice	Thick Film Resistors - Through Hole 50W 4.7ohm 5% Learn More about Vishay / Sfernice vishay sfernice rto20 50 power resistors	Datasheet	712In Stock	£7.25 £5.83 £5.82 £5.77 View £5.64 £5.13	Min.: 1 Mult.: 1	Radial	4.7 Ohms	50 W	5 %	150 PPM / C
Thick Film Resistors - Through Hole 20watts 1Kohms 5% RTO020F10000JTE3 Vishay / Sfernice 1: £7.46 287In Stock 50On Order	Mfr. Part No. RTO020F10000JTE3 Mouser Part No 72-RTO20F-1K-5	Vishay / Sfernice	Thick Film Resistors - Through Hole 20watts 1Kohms 5% Learn More about Vishay / Sfernice vishay sfernice rto20 50 power resistors	Datasheet	287In Stock 50On Order	£7.46 £6.02 £6.01 £5.31	Min.: 1 Mult.: 1	Radial	1 kOhms	20 W	5 %	150 PPM / C
Thick Film Resistors - Through Hole 20watts 47ohms 5% RTO020F47R00JTE3 Vishay / Sfernice 1: £6.07 376In Stock	Mfr. Part No. RTO020F47R00JTE3 Mouser Part No 72-RTO20F-47-5	Vishay / Sfernice	Thick Film Resistors - Through Hole 20watts 47ohms 5% Learn More about Vishay / Sfernice vishay sfernice rto20 50 power resistors	Datasheet	376In Stock	£6.07 £5.63 £5.00 £4.83 View £4.51 £4.39	Min.: 1 Mult.: 1	Radial	47 Ohms	20 W	5 %	150 PPM / C
Thick Film Resistors - Through Hole 20W 12ohm 5% RTO020F12R00JTE3 Vishay / Sfernice 1: £8.09 99In Stock 200Expected 31/12/2026	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	99In Stock 200Expected 31/12/2026	£8.09 £6.54 £6.19 £5.98 View £5.81 £5.57 £5.12 £4.83	Min.: 1 Mult.: 1	Radial	12 Ohms	20 W	5 %	150 PPM / C
Thick Film Resistors - Through Hole 20W 15ohm 5% RTO020F15R00JTE3 Vishay / Sfernice 1: £7.65 74In Stock	Mfr. Part No. RTO020F15R00JTE3 Mouser Part No 72-RTO020F15R00JTE3	Vishay / Sfernice	Thick Film Resistors - Through Hole 20W 15ohm 5% Learn More about Vishay / Sfernice vishay sfernice rto20 50 power resistors	Datasheet	74In Stock	£7.65 £6.19 £5.85 £5.84 View £5.49 £5.33 £5.31	Min.: 1 Mult.: 1	Radial	15 Ohms	20 W	5 %	150 PPM / C
Thick Film Resistors - Through Hole 20W 2.7Kohm 5% RTO020F27000JTE3 Vishay / Sfernice 1: £8.50 75In Stock	Mfr. Part No. RTO020F27000JTE3 Mouser Part No 72-RTO020F27000JTE3	Vishay / Sfernice	Thick Film Resistors - Through Hole 20W 2.7Kohm 5% Learn More about Vishay / Sfernice vishay sfernice rto20 50 power resistors	Datasheet	75In Stock	£8.50 £6.93 £6.57 £6.36 View £6.18 £5.70 £5.60 £5.51 Quote	Min.: 1 Mult.: 1	Radial	2.7 kOhms	20 W	5 %	150 PPM / C
Thick Film Resistors - Through Hole 470 OHM 5% 150PPM 20W RTO020F470R0JTE3 Vishay / Sfernice 1: £7.63 1In Stock	Mfr. Part No. RTO020F470R0JTE3 Mouser Part No 72-RTO020F470R0JTE3	Vishay / Sfernice	Thick Film Resistors - Through Hole 470 OHM 5% 150PPM 20W Learn More about Vishay / Sfernice vishay sfernice rto20 50 power resistors	Datasheet	1In Stock	£7.63 £6.21 £6.08 £5.83 £5.31	Min.: 1 Mult.: 1	Radial	470 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 50In Stock	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	50In Stock	£15.57 £10.99 £10.98 £10.21 View £9.27 £8.80 £8.67 Quote	Min.: 1 Mult.: 1	Radial	4.7 Ohms	20 W	1 %	150 PPM / C
Thick Film Resistors - Through Hole 20W 56ohm 5% RTO020F56R00JTE3 Vishay / Sfernice 1: £7.39 78In Stock	Mfr. Part No. RTO020F56R00JTE3 Mouser Part No 72-RTO020F56R00JTE3	Vishay / Sfernice	Thick Film Resistors - Through Hole 20W 56ohm 5% Learn More about Vishay / Sfernice vishay sfernice rto20 50 power resistors	Datasheet	78In Stock	£7.39 £5.96 £5.95 £5.45 £5.31	Min.: 1 Mult.: 1	Radial	56 Ohms	20 W	5 %	150 PPM / C
Thick Film Resistors - Through Hole 20W 82ohm 5% RTO020F82R00JTE3 Vishay / Sfernice 1: £7.65 85In Stock	Mfr. Part No. RTO020F82R00JTE3 Mouser Part No 72-RTO020F82R00JTE3	Vishay / Sfernice	Thick Film Resistors - Through Hole 20W 82ohm 5% Learn More about Vishay / Sfernice vishay sfernice rto20 50 power resistors	Datasheet	85In Stock	£7.65 £6.19 £5.85 £5.84 View £5.49 £5.33 £5.31	Min.: 1 Mult.: 1	Radial	82 Ohms	20 W	5 %	150 PPM / C
Thick Film Resistors - Through Hole 20W .1ohms 1% RTO020FR1000FTE3 Vishay / Sfernice 1: £11.88 2In Stock 100Expected 19/01/2027	Mfr. Part No. RTO020FR1000FTE3 Mouser Part No 72-RTO020FR1000FTE3	Vishay / Sfernice	Thick Film Resistors - Through Hole 20W .1ohms 1% Learn More about Vishay / Sfernice vishay sfernice rto20 50 power resistors	Datasheet	2In Stock 100Expected 19/01/2027	£11.88 £9.93 £9.60 £8.80 £8.69	Min.: 1 Mult.: 1	Radial	100 mOhms	20 W	1 %	150 PPM / C
Thick Film Resistors - Through Hole RTO 50 F 1U 1% TU50 e1 RTO050F1R000FTE1 Vishay / Sfernice 1: £18.20 40In Stock	Mfr. Part No. RTO050F1R000FTE1 Mouser Part No 72-RTO050F1R000FTE1	Vishay / Sfernice	Thick Film Resistors - Through Hole RTO 50 F 1U 1% TU50 e1	Datasheet	40In Stock	£18.20 £12.85 £12.84 £11.55 View £10.85 £10.19 £10.02 £9.94 Quote	Min.: 1 Mult.: 1	Radial	1 Ohms	50 W	1 %	150 PPM / C
Thick Film Resistors - Through Hole RTO 50 F 2U 5% TU50 e1 RTO050F2R000JTE1 Vishay / Sfernice 1: £11.65 39In Stock 100Expected 10/11/2026	Mfr. Part No. RTO050F2R000JTE1 Mouser Part No 72-RTO050F2R000JTE1	Vishay / Sfernice	Thick Film Resistors - Through Hole RTO 50 F 2U 5% TU50 e1 Learn More about Vishay / Sfernice vishay sfernice rto20 50 power resistors	Datasheet	39In Stock 100Expected 10/11/2026	£11.65 £8.98 £7.38 £7.18 View £6.57 £6.43 £6.27 Quote	Min.: 1 Mult.: 1	Radial	2 Ohms	50 W	5 %	150 PPM / C
Thick Film Resistors - Through Hole 50W 2.2ohm 5% RTO050F2R200JTE1 Vishay / Sfernice 1: £7.96 85In Stock	Mfr. Part No. RTO050F2R200JTE1 Mouser Part No 72-RTO050F2R200JTE1	Vishay / Sfernice	Thick Film Resistors - Through Hole 50W 2.2ohm 5% Learn More about Vishay / Sfernice vishay sfernice rto20 50 power resistors	Datasheet	85In Stock	£7.96 £7.85 £7.69 £6.83 View £6.59 £6.37 £6.21	Min.: 1 Mult.: 1	Radial	2.2 Ohms	50 W	5 %	150 PPM / C
Thick Film Resistors - Through Hole 50W 330ohm 5% RTO050F330R0JTE1 Vishay / Sfernice 1: £8.21 5In Stock 200On 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	5In Stock 200On Order On Order Ship Dates Mfr. No: RTO050F330R0JTE1 Stock: 5 Can Dispatch Immediately On Order: 100 Expected 05/11/2026 100 Expected 10/11/2026 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 50W 3.9ohm 5% RTO050F3R900JTE1 Vishay / Sfernice 1: £7.66 72In Stock	Mfr. Part No. RTO050F3R900JTE1 Mouser Part No 72-RTO050F3R900JTE1	Vishay / Sfernice	Thick Film Resistors - Through Hole 50W 3.9ohm 5% Learn More about Vishay / Sfernice vishay sfernice rto20 50 power resistors	Datasheet	72In Stock	£7.66 £7.59 £6.83 £6.50 £6.21	Min.: 1 Mult.: 1	Radial	3.9 Ohms	50 W	5 %	150 PPM / C
Thick Film Resistors - Through Hole 50W 4.7Kohm 5% RTO050F47000JTE1 Vishay / Sfernice 1: £9.25 3In Stock	Mfr. Part No. RTO050F47000JTE1 Mouser Part No 72-RTO050F47000JTE1	Vishay / Sfernice	Thick Film Resistors - Through Hole 50W 4.7Kohm 5% Learn More about Vishay / Sfernice vishay sfernice rto20 50 power resistors	Datasheet	3In Stock	£9.25 £7.56 £7.17 £6.94 View £6.76 £6.57 £6.43 £6.31 Quote	Min.: 1 Mult.: 1	Radial	4.7 kOhms	50 W	5 %	150 PPM / C
Thick Film Resistors - Through Hole 5 OHM 5% 150PPM 50W RTO050F5R000JTE1 Vishay / Sfernice 1: £10.02 2In Stock	Mfr. Part No. RTO050F5R000JTE1 Mouser Part No 72-RTO050F5R000JTE1	Vishay / Sfernice	Thick Film Resistors - Through Hole 5 OHM 5% 150PPM 50W Learn More about Vishay / Sfernice vishay sfernice rto20 50 power resistors	Datasheet	2In Stock	£10.02 £8.24 £7.83 £7.59 View £7.39 £7.21 £7.10 £7.00 Quote	Min.: 1 Mult.: 1	Radial	5 Ohms	50 W	5 %	150 PPM / C
Thick Film Resistors - Through Hole 50W 680ohm 5% RTO050F680R0JTE1 Vishay / Sfernice 1: £7.56 1In Stock	Mfr. Part No. RTO050F680R0JTE1 Mouser Part No 72-RTO050F680R0JTE1	Vishay / Sfernice	Thick Film Resistors - Through Hole 50W 680ohm 5% Learn More about Vishay / Sfernice vishay sfernice rto20 50 power resistors	Datasheet	1In Stock	£7.56 £7.53 £6.83 £6.21	Min.: 1 Mult.: 1	Radial	680 Ohms	50 W	5 %	150 PPM / C
Thick Film Resistors - Through Hole RTO 50 F 6U8 1% TU50 e1 RTO050F6R800FTE1 Vishay / Sfernice 1: £12.33 50In Stock	Mfr. Part No. RTO050F6R800FTE1 Mouser Part No 72-RTO050F6R800FTE1	Vishay / Sfernice	Thick Film Resistors - Through Hole RTO 50 F 6U8 1% TU50 e1	Datasheet	50In Stock	£12.33 £10.34 £10.33 £9.39 £9.31	Min.: 1 Mult.: 1	Radial	6.8 Ohms	50 W	1 %	150 PPM / C
Thick Film Resistors - Through Hole RTO 50 F U2 5% TU50 e1 RTO050FR2000JTE1 Vishay / Sfernice 1: £8.72 24In Stock	Mfr. Part No. RTO050FR2000JTE1 Mouser Part No 72-RTO050FR2000JTE1	Vishay / Sfernice	Thick Film Resistors - Through Hole RTO 50 F U2 5% TU50 e1 Learn More about Vishay / Sfernice vishay sfernice rto20 50 power resistors	Datasheet	24In Stock	£8.72 £7.13 £6.84 £6.37 £6.21	Min.: 1 Mult.: 1	Radial	200 mOhms	50 W	5 %	150 PPM / C
Thick Film Resistors - Through Hole 20watts 1ohm 5% RTO020F1R000JTE3 Vishay / Sfernice 1: £8.45 7In Stock	Mfr. Part No. RTO020F1R000JTE3 Mouser Part No 72-RTO20F-1-5	Vishay / Sfernice	Thick Film Resistors - Through Hole 20watts 1ohm 5% Learn More about Vishay / Sfernice vishay sfernice rto20 50 power resistors	Datasheet	7In Stock	£8.45 £6.85 £6.49 £6.27 View £6.09 £5.89 £5.82 £5.72 Quote	Min.: 1 Mult.: 1	Radial	1 Ohms	20 W	5 %	150 PPM / C
Thick Film Resistors - Through Hole 20watts 10ohms 5% RTO020F10R00JTE3 Vishay / Sfernice 1: £6.77 36In Stock	Mfr. Part No. RTO020F10R00JTE3 Mouser Part No 72-RTO20F-10-5	Vishay / Sfernice	Thick Film Resistors - Through Hole 20watts 10ohms 5% Learn More about Vishay / Sfernice vishay sfernice rto20 50 power resistors	Datasheet	36In Stock	£6.77 £6.68 £6.54 £5.83 View £5.60 £5.31	Min.: 1 Mult.: 1	Radial	10 Ohms	20 W	5 %	150 PPM / C
Thick Film Resistors - Through Hole 20watts 100ohms 5% RTO020F100R0JTE3 Vishay / Sfernice 1: £7.65 17In Stock 400Expected 27/10/2026	Mfr. Part No. RTO020F100R0JTE3 Mouser Part No 72-RTO20F-100-5	Vishay / Sfernice	Thick Film Resistors - Through Hole 20watts 100ohms 5% Learn More about Vishay / Sfernice vishay sfernice rto20 50 power resistors	Datasheet	17In Stock 400Expected 27/10/2026	£7.65 £6.19 £5.86 £5.51 View £5.35 £5.31	Min.: 1 Mult.: 1	Radial	100 Ohms	20 W	5 %	150 PPM / C

RTO20 & RTO50 Power Resistors

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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
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200 mOhms
220 mOhms
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RTO20 & RTO50 Power Resistors

Types of Resistors

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