SPR / SPRM Series
Stackpole Electronics, Inc.
Discharge Path Resistor
Resistive Product Solutions
Features:
•
•
•
•
•
•
•
•
Excellent anti-surge characteristics
Stable characteristics through the resistance range
Applications include power supplies, CRT’s and
anti-surge circuits
Good alternative to carbon composition resistors
Cut and formed product is available on select sizes;
contact Stackpole for details
100% RoHS compliant and lead free without exemption
Halogen free
REACH compliant
Electrical Specifications
Type / Code
Power Rating (W)
@ 70ºC
Maximum
Working
Voltage
SPRM12
SPR1
0.5
1
E=√ P*R
Maximum
Overload
Voltage (V)
2500
5000
Surge
Withstanding
Voltage (KV)
Ohmic Range (Ω) and Tolerance
5%
10
1M - 12M
Mechanical Specifications
A
Body Length
0.354 ± 0.039
9.00 ± 1.00
0.591 ± 0.039
15.00 ± 1.00
Type / Code
SPRM12
SPR1
B
Body Diameter
0.118 ± 0.020
3.00 ± 0.50
0.197 ± 0.020
5.00 ± 0.50
C
Lead Length (Bulk)
1.102 ± 0.079
28.00 ± 2.00
1.378 ± 0.118
35.00 ± 3.00
D
Lead Diameter
0.028 ± 0.002
0.70 ± 0.05
0.031 ± 0.002
0.80 ± 0.05
Unit
inches
mm
inches
mm
Performance Characteristics (JIS C 5201-1)
Test
Test Results
Moisture Resistance
Temperature Cycling
Load Life
Resistance to Soldering Heat
Short Time Overload
Discharge
± 5%
± 1%
± 5%
± 1%
± 2%
± 10%
Operating Temperature Range: -55ºC to +155ºC
Rev Date: 10/22/2020
This specification may be changed at any time without prior notice
Please confirm technical specifications before you order and/or use.
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SPR / SPRM Series
Stackpole Electronics, Inc.
Discharge Path Resistor
Resistive Product Solutions
Repetitive Pulse Information:
If repetitive pulses are applied to resistors, pulse wave form must be less than “pulse limiting voltage”, “pulse limiting
current” or “pulse limiting wattage” calculated by the formula below.
Vp = K√P x R x T/t
lp = K√P/R x T/t
Pp = K2 x P x T/t
Where: Vp:
lp:
Pp:
P:
R:
T:
t:
K:
[Vr:
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
Note 6:
Pulse limiting voltage (V)
Pulse limiting current (A)
Pulse limiting wattage (W)
Power rating (W)
Nominal resistance (ohm)
Repetitive period (sec)
Pulse duration (sec)
Coefficient: 1
Rated Voltage (V), Ir: Rated Current (A)]
If T > 10 → T = 10 (sec), T / t > 1000 → T / t = 1000
If T > 10 and T / t > 1000, “Pulse Limiting power (Single pulse) is applied
If Vp < Vr (lp < lr or Pp < P), Vr (lr, P) is Vp (lp, Pp)
Pulse limiting voltage (current, wattage) is applied at less than rated ambient temperature.
If ambient temperature is more than the rated temperature (70 °C), decrease power rating according to
“Power Derating Curve”
Assure sufficient margin for use period and conditions for “pulse limiting voltage”
If the pulse waveform is not square wave, judge after transform the waveform into square
wave according to the “Waveform Transformation to Square Wave”.
Rev Date: 10/22/2020
This specification may be changed at any time without prior notice
Please confirm technical specifications before you order and/or use.
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SPR / SPRM Series
Stackpole Electronics, Inc.
Discharge Path Resistor
Resistive Product Solutions
Waveform Transformation to Square Wave
1.
Discharge curve wave with time constant “t” → Square wave
2.
Damping oscillation wave with time constant of envelope “t” → Square wave
3.
Half-wave rectification wave → Square wave
4.
Triangular wave → Square wave
5.
Special wave → Square wave
Rev Date: 10/22/2020
This specification may be changed at any time without prior notice
Please confirm technical specifications before you order and/or use.
3
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marketing@seielect.com
SPR / SPRM Series
Stackpole Electronics, Inc.
Discharge Path Resistor
Resistive Product Solutions
Recommended Solder Profile
This information is intended as a reference for solder profiles for Stackpole resistive components. These profiles should
be compatible with most soldering processes. These are only recommendations. Actual numbers will depend on board
density, geometry, packages used, etc., especially those cells labeled with “*”.
100% Matte Tin / RoHS Compliant Terminations
Soldering iron recommended temperatures: 330°C to 350°C with minimum duration.
Maximum number of reflow cycles: 3.
Wave Soldering
Description
Maximum
Recommended
Preheat Time
80 seconds
70 seconds
Temperature Diff.
140°C
120°C
Solder Temp.
260°C
250°C
Dwell Time at Max.
10 seconds
5 seconds
Ramp DN (°C/sec)
N/A
N/A
Temperature Diff. = Defference between final preheat stage and soldering stage.
Minimum
60 seconds
100°C
240°C
*
N/A
Convection IR Reflow
Description
Maximum
Recommended
Minimum
Ramp Up (°C/sec)
Dwell Time > 217°C
Solder Temp.
Dwell Time at Max.
Ramp DN (°C/sec)
3°C/sec
150 seconds
260°C
30 seconds
6°C/sec
2°C/sec
90 seconds
245°C
15 seconds
3°C/sec
*
60 seconds
*
10 seconds
*
Rev Date: 10/22/2020
This specification may be changed at any time without prior notice
Please confirm technical specifications before you order and/or use.
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SPR / SPRM Series
Stackpole Electronics, Inc.
Discharge Path Resistor
Resistive Product Solutions
Recommended Lead Free Resistor Reflow Profile
Packaging Specifications
Series
SPRM12
SPR1
A max.(1)
B max
2.618
66.50
3.917
99.50
13.504
343.00
13.504
343.00
D(2)
C
0.197
5.00
0.394
10.00
±
±
±
±
0.020
0.50
0.020
0.50
2.063
52.40
2.063
52.40
±
±
±
±
0.079
2.00
0.079
2.00
Tape
Unit
0.250
6.35
0.250
6.35
inches
mm
inches
mm
RoHS Compliance
Stackpole Electronics has joined the worldwide effort to reduce the amount of lead in electronic components and to meet the various
regulatory requirements now prevalent, such as the European Union’s directive regarding “Restrictions on Hazardous Substances”
(RoHS 3). As part of this ongoing program, we periodically update this document with the status regarding the availability of our
compliant components. All our standard part numbers are compliant to EU Directive 2011/65/EU of the European Parliament as
amended by Directive (EU) 2015/863/EU as regards the list of restricted substances.
Rev Date: 10/22/2020
This specification may be changed at any time without prior notice
Please confirm technical specifications before you order and/or use.
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SPR / SPRM Series
Stackpole Electronics, Inc.
Discharge Path Resistor
Resistive Product Solutions
RoHS Compliance Status
Standard
Product
Series
SPR
Description
Package /
Termination
Type
Standard
Series
RoHS
Compliant
Lead-Free Termination
Composition
Lead-Free
Mfg. Effective Date
(Std Product Series)
Lead-Free
Effective Date
Code
(YY/WW)
Discharge Path Leaded Resistor
Axial
YES
99.3/0.7 Sn/Cu
Apr-05
05/14
“Conflict Metals” Commitment
We at Stackpole Electronics, Inc. are joined with our industry in opposing the use of metals mined in the “conflict region” of the Eastern
Democratic Republic of the Congo (DRC) in our products. Recognizing that the supply chain for metals used in the electronics industry
is very complex, we work closely with our own suppliers to verify to the extent possible that the materials and products we supply do
not contain metals sourced from this conflict region. As such, we are in compliance with the requirements of Dodd-Frank Act regarding
Conflict Minerals.
Compliance to “REACH”
We certify that all passive components supplied by Stackpole Electronics, Inc. are SVHC (Substances of Very High Concern) free and
compliant with the requirements of EU Directive 1907/2006/EC, “The Registration, Evaluation, Authorization and Restriction of
Chemicals”, otherwise referred to as REACH. Contact us for complete list of REACH Substance Candidate List.
Environmental Policy
It is the policy of Stackpole Electronics, Inc. (SEI) to protect the environment in all localities in which we operate. We continually strive
to improve our effect on the environment. We observe all applicable laws and regulations regarding the protection of our environment
and all requests related to the environment to which we have agreed. We are committed to the prevention of all forms of pollution.
How to Order
1
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3
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9
10
S
P
R
1
J
B
1
0
M
0
Product Series
SPR Standard
SPRM
Mini
Power
Size
W
12
0.5
1
1
Code
J
Tolerance
Tol
Value
5%
E24
Packaging
Code Description
Size
B
Bulk
SPRM12; SPR1
SPRM12
A
Ammo
SPR1
Resistance Value
Quantity
1000
2000
500
Four characters with
the multiplier used as
the decimal holder.
1 Mohm = 1M00
12 Mohm = 12M0
Rev Date: 10/22/2020
This specification may be changed at any time without prior notice
Please confirm technical specifications before you order and/or use.
6
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marketing@seielect.com
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