A-SERIES Datasheet, PDF (1/2 Pages) Ohmite Mfg. Co. – High Surge Energy

A Series
PulsEater® Ceramic Composition
Available in E12 Ohmic values
The “A” Series non-inductive, ceramic composite
resistors are designed for a variety of applications
where high energy handling capabilities are crucial.
These resistors are ideal for any application which
is subject to surges, high peak power, or impulse
energy.
Their unique design allows uniform distribution
of energy throughout their structure which results
in low thermal stress. The high-temperature,
solvent-resistant epoxy coating carries a UL94V0
flammability rating which is suitable for almost any
environment.
F eat u res
• High Surge Energy
• Non-Inductive
• Small Size
*AZ style is provided with
dual terminal wires
A pp l ications
• Motor Drives
• Power Supplies, UPS
• Power Conversion
• In-Rush Current Limiting
SERIES SPECIFICATIONS


Resistance¹
P
avg.²
Impulse
Voltage³
Energy⁴
Series
(ohms)
(watts)
(volts)
(joule)
AV
3.3 to 10K
2.0
1000
250
AW
4.7 to 15K
2.5
1500
400
AX
1.0 to 3.3K
3.5
1000
700
AY
2.2 to 6.8K
4.5
2000
1400
AZ
1.5 to 4.7K
5.5
2500
2800
1_{E12 Standard Values ±10%;} 2_{Free Air 40°C Ambient;} 3_{In Air;} 4_{Single Impulse}
c h aracteritics
Resistance Element Bulk Ceramic
Terminals Radial; 100% Sn solder coated radial (60/40 sol-
der available upon request)
Coating UL94V0, solvent resistant epoxy
Tolerance ±10% Standard
Operating Temp. -55°C to 150°C
Range
Derating Derates linearly from 100% @ 50°C to 0% @
150°C
Temperature Rise 100°C @ 100% rated power, 50°C ambient
Mounting clip
D
H
L
Dim. (mm)
Part No. D H L for Series Color
5911E 20 23 13 AX and AY White
5910E 25 26 15 AZ
Black
This saddle clip conforms to
the configuration of Ohmite’s
A Series resistor to provide
secure mounting. Made
of a durable thermoplastic
polyester, the saddle clip is
designed to secure the A
Series in place while safely
withstanding its operat-
ing temperatures. Use (2)
saddle clips per resistor for
extra stability.
Parameter Max. ∆R
Life Test +5%
Single Pulse ±1.5%
Energy
Repetitive HV ±2.0%
Pulsing
Short-time ±1.5%
Overload
Short-term High ±1.5%
Temp
Long-term High ±2.0%
Temp
Thermal Shock ±2.0%
Cycle
Moisture ±1.0%
Resistance
Test Method
MIL-STD-202F, method 108A.
except 50°C, 1000 hrs. @ rated
power; 1.5 hrs. ON, 0.5 hrs. OFF
Single pulse, capacitor discharge
at Rated Energy; 350VDC for AW
and AX sizes; 650VDC for AY and
AZ sizes.
10 joules @ 5.OKV, 10,000 cycles
10x rated power. 5 sec. ON, 5
sec. OFF, 5 cycles
250°C for 30 seconds
1000 hours @ 150°C
MIL-STD-202F, method 107D.
-55°C to +125°C, 5 cycles
90% to 95% rh @ 40°C, 1000 hrs.
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