PRM SERIES
OPTIONS
PULSE RESISTORS, SURFACE MOUNT
RESISTORS
MCAPS
& COILS
MDELAY
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
Pulse Voltage
2
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. Multiply Opt. X by 0.7
2
Pulse voltage capability is dependent on res.value, waveform, & repetition rate. Multiply Opt.X by 0.7
3
Expanded range available
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 to meet the required surge level.
Pulse voltage must not exceed Peak Voltage rating, and the average power
during repetitive pulses must not exceed the rated wattage. For improved
reliability and performance, a 30% safety factor is recommended for infrequent
pulses and 50% for repetitive pulses (e.g. select a model rated 13joules for a
single 10j pulse, or 15j for repetitive 10j pulses). Verify selection by evaluating
under worst-case conditions. Depending on resistance 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)
4-Digit Resis. Code:
3 significant digits & multiplier:
R100=0.1Ω, 1R00=1Ω, 1000=100Ω, 1001=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
FA005A Specifications subject to change without notice
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