RTO20C [VISHAY]
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| 型号： | RTO20C |
| 厂家： | 
VISHAY |
| 描述： | 暂无描述 电阻器 |
| 文件： | 总4页 (文件大小：97K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
RTO 20
Vishay Sfernice
Power Resistors Thick Film Technology
FEATURES
• 20 W at 25 °C Heatsink Mounted
• High Power Dissipation to size ratio
• Wide Resistance Range from 0.01 Ω to 1 MΩ
• Negligible Inductance
RoHS
COMPLIANT
• Easy Mounting
• TO 220 package: Compact and easy to mount
Two versions of this thick film resistor are available:
• A Radial Leaded version for PCB Mounting
The well known TO 220 package is compact and easy to
mount.
• A Flat Lead version for Surface Mounting
DIMENSIONS in millimeters
RTO 20F - LEADED
RTO 20C - FOR SURFACE MOUNTING
.ꢀ5
.ꢀ5
10ꢀ1
1ꢀ3
Ø 3ꢀ6
10ꢀ1
Ø 3ꢀ6
1ꢀ3
15
12ꢀ5
8ꢀ8
15
12ꢀ5
8ꢀ8
13ꢀ7
2
3
0ꢀ3
1ꢀ6
2ꢀ5
Ø 0ꢀ8
5ꢀ08
5ꢀ08
• Tolerance unless otherwise specified: 0ꢀ. mm
• Only for RTO 20 version C = during surface mount soldering temperature profile
must not cause the metal tab of this device to exceed 220 °Cꢀ
MECHANICAL SPECIFICATIONS
ELECTRICAL SPECIFICATIONS
Mechanical Protection
Resistive Element
Connections
Insulated Case
Thick Film
Resistance Range
0.010 Ω to 1 MΩ serie E24
Tolerances (Standard)
1 ꢀ to 10 ꢀ
Tinned copper
2.2 g max.
Dissipation and
Associated:
Onto a heatsink
Weight
20 W at + 25 °C
RTH(j-c): 6.5 °C/W
free air:
Thermal Resistance
and Nominal Power
DIMENSIONS
2 W at + 25 °C
Standard Package
TO 220
Insulated case
Temperature Coefficient
Standard (- 55 °C; + 150 °C)
Limiting Element Voltage
See Performance table
150 ppm/°C
ENVIRONMENTAL SPECIFICATIONS
250 V
Temperature Range
Climatic Category
Sealing
- 55 °C to + 155 °C
55/155/56
Dielectric Strength
MIL STD 202
2000 VRMS - 1 min - 10 mA Max
(Between Terminals and Heatsink)
Sealed container
Solder immersion
Insulation Resistance
Inductance
≥ 106 MΩ
≤ 0.1 µH
3.12 kΩ
Flammability
IEC 60695-11-5
2 applications 30 s seperated
by 60 s
Critical Resistance
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14
For technical questions, contact: sfer@vishay.com
Document Number: 50005
Revision: 05-Jun-07
RTO 20
Power Resistors Thick Film Technology
Vishay Sfernice
PERFORMANCE
TESTS
CONDITIONS
TYPICAL DRIFTS
EN 60115-1
2 Pr for R < 2 Ω
1.6 Pr for R ≥ 2 Ω
Us < 1.5 UL
Momentary Overload
(0.25 ꢀ + 0.005 Ω)
(0.5 ꢀ + 0.005 Ω)
EN 60115-1/60068-2-14
5 cycles
- 55 °C to + 155 °C
Rapid Temperature Change
EN 60115-1
1000 h Pr at + 25 °C
Load Life
(1 ꢀ + 0.005 Ω)
(0.5 ꢀ + 0.005 Ω)
(0.5 ꢀ + 0.005 Ω)
EN 60115-1
56 days R.H. 95 ꢀ
Humidity (Steady State)
High Temperature Exposure
NF EN 140 000
1000 h - 40 ꢀ Pr at + 100 °C
Vibration
MIL STD 202, Method 204 C Test D
MIL STD 202, Method 211 Test A1
(0.2 ꢀ + 0.005 Ω)
(0.2 ꢀ + 0.005 Ω)
Terminal Strength
IEC 60115-1
IEC 60068-2-27
Saw tooth: 100 g/6 ms
Shock
(0.5 ꢀ + 0.005 Ω)
SPECIAL FEATURES
Resistance Values
Tolerances
≥ 0.01
≥ 0.015
≥ 0.1
≥ 0.5
1 ꢀ at 10 ꢀ
Typical Temperature
Coefficient Range
(- 55 °C/+ 155 °C)
900 ppm/°C
700 ppm/°C
250 ppm/°C
150 ppm/°C
Note: For very low ohmic values, TCR for information
CHOICE OF THE HEATSINK
The user must choose according to the working conditions of the component (power, room temperature).
Maximum working temperature must not exceed 155 °C. The dissipated power is simply calculated by the following ratio:
(1)
ΔT
------------------------------------------------------------
P =
[RTH (j-c) + RTH (c-a)]
P:
expressed in W
ΔT:
RTH
difference between maximum working temperature and room temperature
:
:
(j-c): thermal resistance value measured between resistive layer and outer side of the resistor. It is the thermal
resistance of the component: (Special Features Table)
RTH
(c-a): thermal resistance value measured between outer side of the resistor and room temperature. It is the thermal
resistance of the heatsink itself (type, shape) and the quality of the fastening device.
Example:
TH: (c-a) for RTO 20 power rating 10 W at ambient temperature + 25 °C
R
Thermal resistance RTH (j-c): 6.5 °C/W
Considering equation (1) we have:
ΔT = 155 °C - 25 °C = 130 °C
ΔT
P
130
---------
= 13 °C/W
-------
RTH (j-c) + RTH (c-a) =
=
10
RTH (c-a) = 13 °C/W - 6.5 °C/W = 6.5 °C/W
Document Number: 50005
Revision: 05-Jun-07
For technical questions, contact: sfer@vishay.com
www.vishay.com
15
RTO 20
Power Resistors Thick Film Technology
Vishay Sfernice
OVERLOADS
In any case the applied voltage must be lower than the maximum overload voltage of 375 V.
The values indicated on the graph below are applicable to resistors in air or mounted onto a heatsink.
ENERGY CURVE
100
10
1
0ꢀ1
0ꢀ01
10-7
10-6
10-5
10-.
10-3
10-2
10-1
OVERLOAD DURATION IN SECONDS
POWER RATING CHART
The temperature of the heatsink should be maintained within the limits specified.
To improve the thermal conductivity, surfaces in contact should be coated with a silicone grease and the torque applied on the
screw for tightening should be around 1 Nm. Spring clip can also be used to mount the component on an heatsink (ex: Kunze,
clip KU4-498).
120
100
75
50
25
0
0
20
.0
60
80
100
120
1.0 155
HEATSINK TEMPERATURE IN °C
MARKING
Model, Style, Resistance Value (in Ω), Tolerance (in ꢀ), Manufacturing Date, VISHAY trademark.
PACKAGING
Tube of 50 units
ORDERING INFORMATION
RTO
20
F
U68
5 %
xxx
TU50
e3
MODEL STYLE CONNECTIONS
RESISTANCE VALUE
TOLERANCE CUSTOM DESIGN PACKAGING LEAD (Pb)-FREE
F: Radial Leads
C: Surface Mount
1 ꢀ
2 ꢀ
Optional
on request:
special TCR,
shape etc.
5 ꢀ
10 ꢀ
SAP PART NUMBERING GUIDELINES
RTO
020
F
R6800
J
T
e3
MODEL
STYLE
CONNECTIONS
RESISTANCE VALUE
TOLERANCE
PACKAGING
LEAD (Pb)-FREE
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16
For technical questions, contact: sfer@vishay.com
Document Number: 50005
Revision: 05-Jun-07
Legal Disclaimer Notice
Vishay
Notice
Specifications of the products displayed herein are subject to change without notice. Vishay Intertechnology, Inc.,
or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies.
Information contained herein is intended to provide a product description only. No license, express or implied, by
estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Vishay's
terms and conditions of sale for such products, Vishay assumes no liability whatsoever, and disclaims any express
or implied warranty, relating to sale and/or use of Vishay products including liability or warranties relating to fitness
for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications.
Customers using or selling these products for use in such applications do so at their own risk and agree to fully
indemnify Vishay for any damages resulting from such improper use or sale.
Document Number: 91000
Revision: 08-Apr-05
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1
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