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 SPW
Vishay Dale
Carbon Film Resistors, Special Purpose High Frequency Load (Tubes)
FEATURES
* High stability and excellent high frequency characteristics * Particularly suited for high frequency applications involving high power, high accuracy RF measurements * Carbon film construction
APPLICATIONS
High frequency wattmeters for output measurement in radio, TV and radar transmitters, dielectric heating and similar RF generating equipment. Ideal for use as non-reactive radio frequency terminations. Special high power designs with internal water cooling are available. Contact factory.
STANDARD ELECTRICAL SPECIFICATIONS
GLOBAL MODEL HISTORICAL MODEL POWER RATING WATTAGE FREE AIR RESISTANCE TOLERANCE % 2, 5 2, 5 2, 5 2, 5 2, 5 LINEARITY TOLERANCE % 10 10 10 10 10 RESISTANCE RANGE TEMPERATURE COEFFICIENT ppm/C 200 average 250 maximum
P25C
SPW236 SPW227 SPW210 SPW214 SPW212 SPW-236 SPW-227 SPW-210 SPW-214 SPW-212 W 120 55 40 10 2
50 ohm standard. Other values available on special order.
Cooling: Approximate increase in wattage when forced air cooling is employed is 3 times wattages shown and for liquid cooling (with heat exchanger) is 60 times wattages shown. The limiting factor insofar as the resistor is concerned is the film temperature. This should not exceed +200C and for maximum stability should not exceed +150C.
MECHANICAL SPECIFICATIONS
Identification: Type designation resistance value, tolerance and code date of manufacture are printed on each unit. All types electroplated copper except SPW-212. The SPW-212 has silver coated termination bands.
Terminations:
MARKING
-- DALE -- Model -- Value -- Tolerance -- Date code
GLOBAL PART NUMBER INFORMATION
New Global Part Numbering: SPW21050R00JSL (preferred part numbering format)
S
GLOBAL MODEL
P
W
2
1
0
5
0
R
0
0
J
S
L
SPECIAL Blank = Standard (Dash Number) (up to 3 digits) From 1-999 as applicable
RESISTANCE VALUE R = Decimal 25R00 = 25 600R0 = 600
TOLERANCE CODE G = 2% J = 5% K = 10%
PACKAGING SL = Custom Package
(see Standard Electrical Specification Table)
Historical Part Number: SPW-210505% (will continue to be accepted)
SPW-210
HISTORICAL MODEL
50
RESISTANCE VALUE
5%
TOLERANCE CODE
S51
PACKAGING
www.vishay.com 208
For Technical Questions, contact ff2aresistors@vishay.com
Document Number: 31038 Revision 06-Sep-04
SPW
Carbon Film Resistors, Special Purpose
DIMENSIONS in inches [millimeters]
Vishay Dale
B
A C
D
GLOBAL MODEL SPW236 SPW227 SPW210 SPW214 SPW212*
A 18.0 0.062 [457.20 1.57] 12.0 0.062 [304.80 1.57] 12.0 0.062 [304.80 1.57] 5.0 0.032 [127.0 0.81] 2.0 0.062 [50.80 1.57]
B 1.75 0.025 [44.45 0.64] 1.125 0.025 [28.58 0.64] 0.875 0.010 [22.23 0.25] 0.562 0.006 [14.27 0.81] 0.250 0.006 [6.35 0.15]
C (O.D.) 1.0 0.063 [25.40 1.60] 0.500 0 .032 [12.70 0.81] 0.625 0.032 [15.88 0.81] 0.500 0.032 [12.70 0.81] 0.250 0.032 [6.35 0.81]
D (I.D.) 1.25 0.025 [31.75 0.64] 0.875 0.020 [22.23 0.51] 0.625 0.020 [15.88 0.51] 0.375 0.013 [9.53 0.33] Solid Rod
* Representative types only. Consult factory for special requirements. Note: 1. C dimension may be varied on special order. 2. Wattage ratings do not allow for mounting hardware.
TEMPERATURE RISE PER C
125
100
75
50
25
0 20 40 60 80 100
% OF RATED POWER
LOAD TEMPERATURE RISE [Operation in Free Air]
Document Number: 31038 Revision 06-Sep-04
For Technical Questions, contact ff2aresistors@vishay.com
www.vishay.com 209
Legal Disclaimer Notice
Vishay
Disclaimer
All product specifications and data are subject to change without notice. Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively, "Vishay"), disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein or in any other disclosure relating to any product. Vishay disclaims any and all liability arising out of the use or application of any product described herein or of any information provided herein to the maximum extent permitted by law. The product specifications do not expand or otherwise modify Vishay's terms and conditions of purchase, including but not limited to the warranty expressed therein, which apply to these products. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document or by any conduct of Vishay. The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications unless otherwise expressly indicated. Customers using or selling Vishay products not expressly indicated for use in such applications do so entirely at their own risk and agree to fully indemnify Vishay for any damages arising or resulting from such use or sale. Please contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for such applications. Product names and markings noted herein may be trademarks of their respective owners.
Document Number: 91000 Revision: 18-Jul-08
www.vishay.com 1


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