PRM SERIES
OPTIONS
PULSE RESISTORS, SURFACE MOUNT
RESISTORSMCAPACITORSMCOILSMDELAY LINES
H
High voltage/ high surge capability
H
Cost effective surface mount package
H
Available on RCD’s exclusive
SWIFT
TM
program
H
Opt. ER: Group A Screening per MIL-R-39008 RCR
H
Opt. B: Increased power
H
Opt. X: Non-inductive
A
↓
→
D
Pulse tolerant surface mount resistors!
Series PRM withstand high energy pulses, and are superior to
conventional film & wirewound types. The heavy duty construction
features a ceramic core, enabling improved thermal transfer and long
term stability. Elements are protected by flame-retardent molding for
excellent environmental performance. Alpha-numeric marking is
standard. PRM resistors are cost effective in a wide variety of pulse
applications including telecom line feed resistors, snubber circuits, in-
rush currents, capacitor charge/discharge circuits, lightning surges, etc.
←
G
→
↑
F
↓
SUGGESTED
PAD LAYOUT
C
↑
B
↓
.010” typ PRM1/2,.050 PRM1
------
H
←
↑
←
E
→
------
SPECIFICATIONS
RCD
Type
PRM1/8
PRM1/4
PRM1/2
PRM1
1
Wattage Rating
Std
Opt B
.125W
.25W
.5W
1W
.5W
1W
2W
4W
Max.
Max. Peak
Resistance
Voltage
1,3,4
Pulse Voltage
2,4
R an g e
150V
250V
350V
500V
3K V
5K V
7K V
12K V
0.1
Ω
- 2K
0.1
Ω
-8.2K
0.1
Ω
-24K
0.1
Ω
-100K
DIMENSIONS Inch [mm]
A
.200 ± .02
[5.1 ± .5]
.250 ± .02
[6.3 ± .5]
.449 ± .032
[11.4 ± .81]
.811 ± .020
[20.6 ± .5]
B
.096± .015
[2.44± .38]
.110± .015
[2.79± .38]
.180 ± .02
[4.57 ± .5]
.275± .020
[6.99± .5]
C
.120 ± .01
[3.18± .25]
.150± .015
[3.81± .38]
.225± .015
[5.71± .38]
.273± .020
[6.93± .5]
D
.025 Min.
[.63]
.032 Min.
[0.8]
.060 Min.
[1.50]
.085 ± .02
[2.16 ± .5]
E
.045 ± .015
[1.14 ± .38]
.060 ± .015
[1.5 ± .38]
.080 ± .015
[2.0 ± .38]
.110 ± .02
[2.79 ± .5]
F
.080
[2.0]
.100
[2.5]
.160
[4.0]
.200
[5.0]
G
.100
[2.5]
.125
[3.2]
.157
[4.0]
.200
[5.0]
H
.08
[2.0]
.120
[3.0]
.200
[5.0]
.600
[15.2]
Rated continuous voltage =
√(PxR),
nte value listed.
2
Pulse voltage capability is dependent on res.value, waveform, & repetition rate.
3
Expanded range available
4
Miltiply by 0.7 on Opt.X parts
SURGE CAPABILITY
100
Energy Rating, Joules
10
PRM1
PRM1/2
1
PRM1/8
PRM1/4
0.1
0.1 0.25 0.5
.75
1
2.5
5
7.5
10
25 50 75 100 250 500 750
Resistance Value (ohms)
1K
2.5K 5K 7.5K 10K 25K 50K 75K 100K
TYPICAL PERFORMANCE CHARACTERISTICS
Wattage D erati ng
Max.Induc*: Opt. X
≤
50
Ω
Max.Induc*: Opt. X
>
50
Ω
Short-ti me Overload
Temperature C ycli ng
TC R (20ppm avai l.)
Moi sture Resi stance
Shock and Vi brati on
Effect of Solderi ng
Voltage C oeffi ci ent
Load Li fe
Operati ng Temp Range
D i electri c Strength
1.25%/°C >70°C (Opt. B to be
derated 0.8%/°C >25°C )
0.2uH PRM1/8-1/2, .3uH PRM1
0.37uH PRM1/8-1/2, .6uH PR1M
±0.5%
±0.5%
±120ppm/°C (<0.2
Ω
=200ppm)
±1%
±0.2%
±0.2%
±0.005%/V
±0.5% Std, ±1% Opt.B
-55 to +150°C , +275°C avai l.
500V (1KV avai l.)
APPLICATION NOTE
Use above chart to select appropriate model
4
to meet the required surge level. Pulse
voltage not to exceed Peak Voltage rating, and the average power during repetitive
pulses not to exceed rated wattage. For improved reliability and performance, a 30%
safety factor is recommended for infrequent pulses and 50% for repetitive pulses
(e.g. select part rated 13joules for a single 10j pulse, or 15j for repetitive 10j pulses).
Verify selection by evaluating under worst-case conditions. Depending on res. value,
Series PRM can satisfy the surge requirements of UL217, UL268, UL294, UL497A,
UL508, UL913, UL943, UL991, UL1459, UL1971, ANSI/IEEE C62.41, CCITT (Rec. K17),
Bellcore TR-NWT-001089, Bellcore TR-TSY-000057, CSA C22.2 No. 225, IEC 664, IEC
801.5, IEEE587, Canadian Doc. CS-03, FCC Part 68. Consult factory for assistance.
P/N DESIGNATION:
PRM1/2
- 1001 - K
T
RCD Type
Options:
X, ER, B (leave blank if std)
Resis. Code 0.5%-1%:
3 signif. figures & multiplier,
e.g. R100=0.1Ω, 1R00=1Ω, 1000=100Ω, 1001=1K.
Resis. Code 2%-10%:
2 signif. figures & multiplier,
e.g. R10=0.1Ω, 1R0=1Ω, 101=100Ω, 102=1KΩ
Tolerance:
J=5% (standard), F=1%, G=2%, K=10%
Packaging:
B = bulk, T = Tape & Reel
Optional TC:
20 =20ppm, 50= 50ppm (leave blank if standard)
* specify Opt.75 for induc levels 50% that of Opt.X, or Opt.76 for 33% that of Opt.X
RCD Components Inc.,
520 E. Industrial Park Dr., Manchester, NH USA 03109
Tel: (603) 669-0054 Fax:(603) 669-5455 E-mail: sales@rcdcomponents.com
www.rcdcomponents.com
FA005C Specifications subject to change without notice
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