PULSE RESISTORS, SURFACE MOUNT
RESISTORS CAPACITORS COILS DELAY LINES
PRM SERIES
OPTIONS
RoHS
Term.W is
RoHS
compliant
& 260°C
compatible
High voltage/ high surge capability
Cost effective surface mount package
Available on RCD’s exclusive
SWIFT
TM
program
Option ER: Group A Screening per MIL-R-39008 RCR
Option B: Increased power
Option 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-retardant 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
------
←
↑
←
E
→
------
H
SPECIFICATIONS
RCD
Type
PRM1/8
PRM1/4
PRM1/2
PRM1
1
Wattage Rating
Max.
Max. Peak
Resistance
1,3,4
2,4
Std
Opt B Voltage
Pulse Voltage
R an g e
.125W
.25W
.5W
1W
.5W
1W
2W
4W
150V
250V
350V
500V
2
DIMENSIONS Inch [mm]
A
.200 ± .02
[5.1 ± .5]
.250 ± .02
[6.3 ± .5]
.449 ± .032
[11.4 ± .81]
B
C
D
.025 Min.
[.63]
.032 Min.
[0.8]
.060 Min.
[1.50]
E
.045 ± .015
[1.14 ± .38]
.060 ± .015
[1.5 ± .38]
.080 ± .015
[2.0 ± .38]
.110 ± .02
[2.79 ± .5]
4
F
.080
[2.0]
.100
[2.5]
.160
[4.0]
.200
[5.0]
G
.100
[2.5]
.125
[3.2]
.157
[4.0]
H
.08
[2.0]
.120
[3.0]
.200
[5.0]
3K V
5K V
7K V
12K V
0.1
Ω
- 2K
0.1
Ω
-10K
0.1
Ω
-24K
0.1
Ω
-100K
.096± .015 .120 ± .01
[2.44± .38] [3.18± .25]
.110± .015 .150± .015
[2.79± .38] [3.81± .38]
.180 ± .02 .225± .015
[4.57 ± .5] [5.71± .38]
.811 ± .020 .275± .020 .273± .020 .085 ± .02
[20.6 ± .5] [6.99± .5] [6.93± .5] [2.16 ± .5]
3
.200 .600
[5.0] [15.2]
Rated continuous voltage =
√(PxR),
nte value listed.
Pulse voltage capability is dependent on res.value, waveform, & repetition rate.
Expanded range available
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 Derating
Max.Induc*: Opt. X
≤
50
Ω
Max.Induc*: Opt. X
>
50
Ω
Short-time Overload
Temperature Cycling
TCR (20ppm avail.)
Moisture Resistance
Shock and Vibration
Effect of Soldering
Voltage Coefficient
Load Life
Operating Temp Range
Dielectric 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 avail.
500V (1KV avail.)
APPLICATION NOTE
Use chart above to select model to meet desired surge level. Pulse not to exceed
peak V & j ratings (derate 30% for Opt.X), and average power during repetitive
pulses nte rated W. 30% safety factor is recommended for infrequent pulses, 50%
typ. for repetitive pulses (refer to Note R42 for derating factors attributable to pulse
width, rep. rate, temp., altitude, humidity). Verify by evaluating under worst-case
conditions. Depending on specifics, PR series can often satisfy the surge
requirements of UL-217, -268, -294, -497, -508, -913, -943, -991, -1459, -1971,
ANSI/IEEE C62.41, CCITT (Rec. K17), Bellcore TR-NWT-001089 & TR-TSY-000057,
CSA C22.2-225, IEC 664, IEC 801.5, IEEE587, Can.Doc. CS-03, FCC Part 68., etc.
Consult factory for assistance.
P/N DESIGNATION:
PR1/2
- 102 - K
T
W
RCD Type
Options:
X, ER, B (leave blank if std)
Resis. Code 1% tol:
3 signif. figures & multiplier,
e.g. R100=0.1Ω, 1R00=1Ω, 10R0=10Ω, 1000=100Ω, 1001=1K.
2%-10%:
2 signif.fig. & multiplier (R10=0.1Ω, 1R0=1Ω, 100=10Ω, 102=1K)
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)
Termination:
W= Lead-free, Q= Tin/Lead (leave blank if either is acceptable,
in which case RCD will select based on lowest price and quickest delivery)
* 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
rcdcomponents.com
Tel: 603
-
669
-
0054 Fax: 603
-
669
-
5455 Email:sales@rcdcomponents.com
FA005D
Sale of this product is in accordance with GF-061. Specifications subject to change without notice.
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