Cost effective high-voltage surge resistors to 200 joules
Available on RCD’s exclusive
SWIFT
TM
program
Molded surface mount version available (PRM
series)
Opt. ER: Group A Screening per MIL-R-39008 RCR
Opt. F: Flameproof coating
Opt. B: Increased power (see Specifications table)
Opt. X: Non-inductive (see Performance Char. table)
Custom marking, cut & form, burn-in, etc.
Excellent Low Cost Replacement for Composition Resistors
Series PR pulse resistors withstand higher energy pulses than conven-
tional film & wirewound types, without the performance disadvantages
of carbon comp resistors. The heavy duty construction features a high
thermal conductivity core and coating, enabling improved stability and
environmental performance. Series PR satisy a wide variety of pulse
applications including lightning, snubber, in-rush current, capacitor
charge, etc. RoHS (Sn) or Mil-spec (Sn-Pb) termination finish available.
←
Inch [mm]
H
→←
L
→
SPECIFICATIONS
↓
↑
d
→
D
←
PR1/8
PR1/4
PR1/2
PR1
PR2
PR5
PR10
Max.
Max.
Wattage Rating
RCD
Resistance
Continuous Peak Pulse
Type Standard Option B
Range
5
Voltage
1,5,8
Voltage
2,5,8
1/8W
1/4W
1/2W
1W
2W
5W
10W
1/2W
1W
2W
4W
5W
10W
15W
150V
250V
350V
500V
750V
800V
1000V
2KV
3.5KV
5KV
10KV
15KV
18KV
25KV
0.1W-2K
0.1W-10K
0.1W-24K
0.1W-100K
0.1W-200K
0.1W-220K
0.1W-510K
L (Body Length)
.145±.025 [3.69±.64]
.240±.032 [6.1±.8]
.375±.040 [9.2±1]
.600±.040 [15.2±1]
.875±.062 [22.2±1.6]
1.05±.062 [26.7± 1.6]
1.72±.062[43.7±1.6]
D
6
(Body Dia.)
.062±.015 [1.6±.38]
.085±.025 [2.16±.64]
.156±.025 [3.96±.64]
.225±.032 [5.72±.8]
.312±.040 [7.92±1]
.350±.040 [8.89±1]
.350±.040 [8.89±1]
d±.004 [.1]
.018 [.46]
.022 [.56]
.028 [.7]
.031 [.8]
3
.039 [1]
3
.039 [1]
.039 [1]
H
4
(min)
1.0 [25.4]
1.0 [25.4]
1.25 [32]
1.25 [32]
1.375 [35]
7
1.375 [35]
1.375 [35]
1
Max voltage =
√(PxR),
not to exceed value listed.
2
Pulse voltage & energy capability is dependent on res.value, waveform, repetition rate, & environmental conditions (refer to R-42 for derating factors).
3
.040” (1mm) lead
dia. is available on PR1 (specify PR1-18), .032” [.8mm] lead dia. is available on PR2 (specify PR2-20)
4
Lead length is for bulk packaging, taped parts may be shorter (consult taping dimensions).
5
Expanded range avail.
6
Allow .024” [.6mm] additonal for Opt. X or values <1W
7
Specify Opt. 56 for 1.5” [38.1] min. lead length, Opt. 70 for 2” [50.8] lead length
8
Multiply by 0.7 on Opt.X parts.
SURGE CAPABILITY
1000
Energy Rating, Joules (j)
100
10
PR1/2
PR10
PR5
PR2
PR1
1
PR1/8
PR1/4
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
PERFORMANCE CHARACTERISTICS, Typ.
Derating, Wattage & Voltage
Max.Induc*: Opt. X≤50W
Max.Induc*: Opt. X>50W
Short-time Overload
Temperature Cycling
TCR (20 & 50ppm avail.)
Moisture Resistance
Shock and Vibration
Effect of Soldering
Voltage Coefficient
Load Life
Operating Temp Range
PR1/8-PR2: 1.25%/°C >70°C,
PR5-PR10 & Opt. B: 0.8%/°C >25°C
0.2uH PR1/8X-PR1/2X,0.3uH PR1X-PR2X,
0.7uH PR5X-PR10X
0.37uH PR1/8X-PR1/2X, 0.6uH PR1X-
PR2X, 1.4uH PR5X-PR10X
±0.5%
±0.5%
±100ppm/°C(<0.2W=200ppm)
±1%
±0.2%
±0.2%
±0.005%/V
±0.5% Std, ±1% Opt.B
-55 to +150°C, +275°C 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. A safety factor of 30% typ. is recommended for infrequent
pulses, 50% typ. for repetitive pulses (refer to Note R42 for derating factors at-
tributable 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,
