20 Series
1.5 in. / 38.1mm
FEATurES
• Rugged vitreous enamel coating withstands high humidity and temperature cycling. • Durable construction, recommended for industrial applications where reliability is paramount. • All-welded construction. • Flame resistant lead free vitreous enamel coating. • RoHS compliant; Add “E” suffix to part number to specify.
Vitreous Enamel Conformal Axial Terminal Wirewound, 5% Tolerance Standard
L D
Dimensions (in. / mm) Max. Series Wattage Ohms Length* Diam.* Volt.** Lead ga. 21 1 1.0-3.0K 0.406 / 10.3 0.156 / 4.0 75 24 22 2 1.0-3.0K 0.406 / 10.3 0.219 / 5.6 65 20 23 3 0.1-10K 0.500 / 12.7 0.220 / 5.6 135 20 25 5 0.1-28K 1.000 / 25.4 0.276 / 7.0 330 20 27 7 0.1-25K 1.250 / 31.8 0.394 / 10.0 450 20 20 10 0.1-100K 1.844 / 46.8 0.394 / 10.0 720 20
12.5 watt size available on special order *For units below 1Ω, add 15% to body diameter, 10% to body length. **Maximum Voltage is based on Ohm’s Law [V=√P*R] as limited by the resistance value of specified product
SPECiFiCATiONS
Material Coating: Conformal lead free vitreous enamel. Core: Ceramic.
Terminals: Solder-coated axial. RoHS solder composition is 96% Sn, 3.5% Ag, 0.5% Cu Derating Linearly from 100% @ +25°C to 0% @ +350°C. Electrical Tolerance: ±5% standard. Other tolerances available. Power rating: Based on 25°C free air rating (other wattages available). Overload: Under 7 watts: 5 times rated wattage for 5 seconds. 7 watts and over: 10 times rated wattage for 5 seconds. Temperature coefficient: 1 to 9.99 ohms: ±50 ppm/°C 10 ohms and over: ±30 ppm/°C
O r d e r i n g i n f O r m at i O n
RoHS Compliant
The 20 Series axial terminal resistors are both durable and economical. They have all the electrical attributes of the more expensive 90 Series resistors, including all-welded construction. They offer the durability of a lead free conformal vitreous enamel coating and are ideal for computer, communications and industrial applications in which cost, quality, and reliability are key considerations.
21JR10E
20 Series Vitreous Enamel Axial Lead Wirewound Wattage Tolerance Resistance Value R10 = 0.10Ω 1 = 1W J = 5% 1R0 = 1.0Ω 2 10R = 10.0Ω 3 250 = 250Ω 5 1K0 = 1,000Ω 7 4K5 = 4,500Ω 0 = 10W 50K = 50,000Ω
Check product availability at
ohmite.com
S ta n d a r d pa rt n u m b e r S f O r 2 0 S e r i e S
Ohmic value Ohmic value 20J––– 10 20J––– 10 Ohmic value Wattage 21J––– 1 22J––– 2 25J––– 5 27J––– 7 23J––– 3 Part No. Prefix Suffix ––– R10 ––– R13 ––– R15 ––– R20 ––– R25 ––– R30 ––– R33 ––– R50 ––– R75 ––– 1R0 –––1R5 –––2R0 –––2R2 –––3R0 –––4R0 –––5R0 –––7R5 –––10R –––12R –––15R –––18R –––20R –––22R –––25R –––27R –––30R –––33R –––35R –––39R –––40R –––47R –––50R –––56R Wattage 21J––– 1 22J––– 2 25J––– 5 27J––– 7 23J––– 3 Part No. Prefix Suffix –––62R –––68R –––75R –––82R –––100 –––120 –––125 –––150 –––180 –––200 –––220 –––225 –––250 –––270 –––300 –––330 –––350 –––390 –––400 –––450 –––470 –––500 –––560 –––600 –––680 –––750 –––800 –––820 –––900 –––1K0 –––1K1 –––1K2 –––1K5 Wattage Part No. Prefix Suffix –––1K8 –––2K0 –––2K2 –––2K5 –––2K7 –––3K0 –––3K3 –––3K5 –––3K9 –––4K0 –––4K5 –––4K7 –––5K0 –––6K0 –––6K8 –––7K0 –––7K5 –––8K0 –––9K0 –––10K –––12K –––13K –––15K –––17K –––20K –––22K –––25K –––30K –––33K –––35K –––40K –––50K 20J––– 10 21J––– 1 22J––– 2 25J––– 5 27J––– 7 23J––– 3
0.10 0.13 0.15 0.20 0.25 0.30 0.33 0.50 0.75 1 1.5 2 2.2 3 4 5 7.5 10 12 15 18 20 22 25 27 30 33 35 39 40 47 50 56
62 68 75 82 100 120 125 150 180 200 220 225 250 270 300 330 350 390 400 450 470 500 560 600 680 750 800 820 900 1,000 1,100 1,200 1,500
1,800 2,000 2,200 2,500 2,700 3,000 3,300 3,500 3,900 4,000 4,500 4,700 5,000 6,000 6,800 7,000 7,500 8,000 9,000 10,000 12,000 13,000 15,000 17,000 20,000 22,000 25,000 30,000 33,000 35,000 40,000 50,000
= Standard values = Non-standard values subject to minimum handling charge per item 20
Shaded values involve very fine resistance wire and should not be used in critical applications without burn-in and/or thermal cycling.
Ohmite Mfg. Co. 1600 Golf Rd., Rolling Meadows, IL 60008 • 1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
