参数资料
| 型号： | L12J4R7 |
| 厂商： | Ohmite |
| 文件页数： | 1/1页 |
| 文件大小： | 0K |
| 描述： | RESISTOR WIREWOUND 4.7 OHM 12W |
| 标准包装： | 1 |
| 系列： | 270 |
| 电阻（欧姆）： | 4.7 |
| 功率（瓦特）： | 12W |
| 复合体： | 绕线 |
| 特点： | 阻燃涂层 |
| 温度系数： | ±400ppm/°C |
| 容差： | ±5% |
| 涂层，外壳类型： | 搪瓷涂层 |
| 安装特点： | 支架（不包括） |
| 尺寸/尺寸： | 0.313" 直径 x 1.748" L（7.94mm x 44.40mm） |
| 引线型： | 焊片 |
| 包装： | 散装 |
| 封装/外壳： | 径向，管状 |
| 相关产品： | 6120D-13-4-ND - MOUNTING HDWR BRACKET ELONGATED 5-100-ND - MOUNTING BRACKET 8W/12W |
| 其它名称： | Q3164507 |
270 Series
Vitreous Enamel Power
D
L
C
See page 36
for mounting
hardware
FEATURES
? TERMINALS SUITABLE FOR SOLDERING
OR BOLT CONNECTION
? HIGH WATTAGE APPLICATIONS
? RUGGED LEAD FREE VITREOUS ENAM-
EL COATING
? FLAME RESISTANT COATING
? ALL-WELDED CONSTRUCTION
? ROHS COMPLIANT AVAILABLE
? “FAST ON” OPTION – SEE TERMINAL
538, PAGE 37
SPECIFICATIONS
Material
Coating: LEAD FREE VITREOUS
ENAMEL. VERY LARGE MODELS (750
WATTS AND UP) ARE SUPPLIED IN
SILICONE CERAMIC. ALSO AVAILABLE
IN LOW-COST CENTOHM COATING;
CONSULT FACTORY.
Core: TUBULAR CERAMIC.
Terminals: SOLDER COATED RADIAL
LUG. ROHS SOLDER COMPOSITION IS
96% SN, 3.5% AG, 0.5% CU
Dimensions (in. / mm ) Core Standard
Series Wattage Ohms L D C Code Voltage Terminal
L12 12 0.1-51K 1.75 / 44.4 0.313 / 7.94 0.188 / 4.76 D 565 57
L25 25 0.15-100K 2.0 / 50.8 0.562 / 14.3 0.313 / 7.94 K 625 40
L50 50 0.38-260K 4.0 / 101.6 0.562 / 14.3 0.313 / 7.94 K 1625 40
L100 100 0.23-101K 6.5 / 165.1 0.750 / 19.1 0.50 / 12.7 M 2845 40
L175 175 0.13-101K 8.5 / 215.9 1.125 / 28.6 0.75 / 19.1 P 3595 46
L225 225 0.16-129K 10.5 / 266.7 1.125 / 28.6 0.75 / 19.1 P 4595 46
L500 500 0.38-218K 12.0 / 304.8 2.50 / 63.5 1.75 / 44.5 S 4970 45
L1000 1000 0.69-392K 20.0 / 508.0 2.50 / 63.5 1.75 / 44.5 S 8900 45
Non-Inductive versions available; Other sizes available; Also available in low cost Centohm or Silicone coating; Consult Ohmite.
* Maximum Voltage is based on Ohm’s Law [V= √ P*R] as limited by the resistance value of specified product
SELECT 270 TYPE FIXED RESISTORS FOR APPLICATIONS REQUIRING WATTAGE RATINGS FROM 12 TO 1000 WATTS.
THE 270 TYPE RESISTORS ARE EQUIPPED WITH LUG TERMINALS SUITABLE FOR SOLDERING OR STURDY BOLT CON-
NECTION. WHEN SECURE MOUNTING IS REQUIRED, THE HOLLOW CORE OF THESE RESISTORS PERMIT FASTENING WITH
SPRING-TYPE BRACKETS, THRU BOLTS OR THRU BOLTS WITH SLOTTED-STEEL BRACKETS.
SUITABLE FOR RUGGED APPLICATIONS, THE 270 TYPE RESISTORS FEATURE ALL-WELDED CONSTRUCTION AND
DURABLE LEAD FREE VITREOUS ENAMEL COATING. MOUNTING BRACKETS NOT INCLUDED WITH RESISTORS.
Derating: LINEARLY FROM 100% @
+25°C TO 0% @ +350°C.
Electrical
Tolerance:
±5% 1 Ω AND OVER (J)
±10% UNDER 1 Ω (K)
Power rating: BASED ON 25°C FREE
AIR RATING.
Overload: 10 TIMES RATED WATTAGE
FOR 5 SECONDS.
Temperature coefficient:
1 TO 20 Ω : ±400 PPM/°C.
ABOVE 20 Ω : ±260 PPM/°C
Dielectric withstanding voltage:
1000 VAC: 12 TO 100 WATT RATING.
3000 VAC: 175 TO 225 WATT RAT-
ING (MEASURED FROM TERMINAL TO
MOUNTING BRACKET)
To calculate max. amps: USE THE
FORMULA √ P/R
J = 5% 1R0 = 1 ?
K = 10% 250 = 250 ?
1K0 = 1,000 ?
25K = 25,000 ?
25K5 = 25,500 ?
470 = Silicone Ceramic 1R00 = 1 ? K = 10%
250R = 250 ?
See website for
1K00 = 1,000 ?
custom core and
25K0 = 25,000 ?
12W 3,900 Ω
25W 12,000 Ω
50W 35,000 Ω
100W 75,000 Ω
ORDERING INFO
Non-inductive
F = Fast on BLANK = STANDARD RoHS
(OPTIONAL) N = NON-INDUCTIVE Compliant
L 25J100E
Series Wattage Tolerance Ohms
Coating
BLANK = VITREOUS
C = CENTOHM
S = SILICONE
MADE-TO-ORDER PARTS
Non-inductive Core Diameter
Blank = Standard See “Core and
N = Non-inductive Terminal Selection” RoHS Compliant
????????????????
Coating Wattage Ohms Tolerance
270 = Vitreous R500 = 0.500 ? J = 5%
Terminal Type
See “Resistor Terminals
for Tubular Cores”
25K5 = 25,500 ? terminal info
S TA N D A R D PA RT N U M B E R S F O R 2 7 0 S E R I E S
Wattage
Power limitations for high resis-
tance values: WHEN RESISTANCE
EXCEEDS THE RESISTANCE VALUES
LISTED, DERATE THE POWER RATING BY
25% TO IMPROVE RELIABILITY:
Power Resistance NO POWER
rating value DERATING
NECESSARY
FOR RATINGS
HIGHER THAN
100W.
Wattage
Ohmic
value
12 Watt
Ohmic
value
12 Watt
0.51
1
3.3
L12JKR51E
L12J1R0E
L12J3R3E
180
270
330
L12J180E
L12J270E
L12J330E
Part No.
Prefix
Suffix
Part No.
Prefix
Suffix
4.7
L12J4R7E
390
L12J390E
1
––– 1R0E
2,500
––– 2K5E
10
L12J10RE
470
L12J470E
2
––– 2R0E
3,000
––– 3K0E
12
L12J12RE
560
L12J560E
3
––– 3R0E
3,500
––– 3K5E
15
L12J15RE
1000
L12J1K0E
4
––– 4R0E
4,000
––– 4K0E
22
L12J22RE
1200
L12J1K2E
5
––– 5R0E
5,000
––– 5K0E
27
33
L12J27RE
L12J33RE
1500
2200
L12J1K5E
L12J2K2E
10
15
––– 10RE
––– 15RE
6,000
7,500
––– 6K0E
––– 7K5E
47
L12J47RE
2700
L12J2K7E
25
––– 25RE
10,000
––– 10KE
68
L12J68RE
4700
L12J4K7E
50
––– 50RE
12,000
––– 12KE
82
100
L12J82RE
L12J100E
10000
18000
L12J10KE
L12J18KE
75
100
––– 75RE
––– 100E
15,000
20,000
––– 15KE
––– 20KE
150
L12J150E
22000
L12J22KE
125
––– 125E
25,000
––– 25KE
51000
L12J51KE
150
––– 150E
30,000
––– 30KE
= Standard values; check availability using the worldwide
inventory search at www.ohmite.com
Red outlined values supplied in Silicone-Ceramic coatings
instead of vitreous enamel.
200
250
500
750
800
1,000
––– 200E
––– 250E
––– 500E
––– 750E
––– 800E
––– 1K0E
35,000
40,000
50,000
60,000
75,000
100,000
––– 35KE
––– 40KE
––– 50KE
––– 60KE
––– 75KE
––– 100KE
1,500
––– 1K5E
150,000
––– 150KE
2,000
––– 2K0E
200,000
––– 200KE
250,000
––– 250KE
34
Ohmite Mfg. Co.
1-866-9-OHMITE ? INT’L 1-847-258-0300 ? FAX 1-847-574-7522 ? WWW.OHMITE.COM ? INFO@OHMITE.COM
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| L12J4R7E | 功能描述:线绕电阻器 - 底架安装 12watt 4.7ohm 5% RoHS:否 制造商:Vishay/Dale 电阻:7 Ohms 容差:1 % 功率额定值:100 W 温度系数:50 PPM / C 系列:RH 工作温度范围:- 55 C to + 250 C 尺寸:46.02 mm Dia. x 46.02 mm W x 88.9 mm L x 44.45 mm H 封装:Bulk 产品:Power Resistors Wirewound Aluminum Housed |
| L12J51K | 功能描述:线绕电阻器 - 底架安装 12watt 51K 5% RoHS:否 制造商:Vishay/Dale 电阻:7 Ohms 容差:1 % 功率额定值:100 W 温度系数:50 PPM / C 系列:RH 工作温度范围:- 55 C to + 250 C 尺寸:46.02 mm Dia. x 46.02 mm W x 88.9 mm L x 44.45 mm H 封装:Bulk 产品:Power Resistors Wirewound Aluminum Housed |
| L12J51KE | 功能描述:线绕电阻器 - 底架安装 12watt 51K 5% RoHS:否 制造商:Vishay/Dale 电阻:7 Ohms 容差:1 % 功率额定值:100 W 温度系数:50 PPM / C 系列:RH 工作温度范围:- 55 C to + 250 C 尺寸:46.02 mm Dia. x 46.02 mm W x 88.9 mm L x 44.45 mm H 封装:Bulk 产品:Power Resistors Wirewound Aluminum Housed |
| L12J560 | 功能描述:线绕电阻器 - 底架安装 12watt 560ohm 5% RoHS:否 制造商:Vishay/Dale 电阻:7 Ohms 容差:1 % 功率额定值:100 W 温度系数:50 PPM / C 系列:RH 工作温度范围:- 55 C to + 250 C 尺寸:46.02 mm Dia. x 46.02 mm W x 88.9 mm L x 44.45 mm H 封装:Bulk 产品:Power Resistors Wirewound Aluminum Housed |
| L12J560E | 功能描述:线绕电阻器 - 底架安装 12watt 560ohm 5% RoHS:否 制造商:Vishay/Dale 电阻:7 Ohms 容差:1 % 功率额定值:100 W 温度系数:50 PPM / C 系列:RH 工作温度范围:- 55 C to + 250 C 尺寸:46.02 mm Dia. x 46.02 mm W x 88.9 mm L x 44.45 mm H 封装:Bulk 产品:Power Resistors Wirewound Aluminum Housed |
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