UT236 – UT347, UT249 – UT363,
UT251 – UT364 and UT261 – UT268
1 Amp To 2 Amp
Standard Recovery Rectifiers
DESCRIPTION
This miniature, standard recovery rectifier diode series offers the user extreme reliability for high-
reliability applications. These devices are available in the leaded A package configuration.
Microsemi also offers numerous other rectifier products to meet higher and lower current ratings
with various recovery time requirements including standard, fast and ultrafast device types in both
through-hole and surface mount packages.
Important:
For the latest information, visit our website
http://www.microsemi.com.
Available
FEATURES
•
•
•
•
•
Miniature voidless hermetically sealed glass package.
Continuous current rating of 2 amps.
Extremely robust construction.
Internal
“Category 1”
metallurgical bonds.
RoHS compliant versions available.
APPLICATIONS / BENEFITS
•
•
•
•
•
Standard recovery 1 amp to 2 amp rectifier series with a V
RWM
range from 100 to 1000 V.
Surge current rating to 30 amps.
Low thermal resistance.
Controlled avalanche breakdown with peak reverse power capability.
Inherently radiation hard as described in Microsemi
MicroNote 050.
“A” Package
MAXIMUM RATINGS
@
T
A
= 25
o
C unless otherwise specified
Parameters/Test Conditions
Junction and Storage Temperature
Thermal Resistance Junction-to-Lead
@ .375 inch lead length from body
Working Peak Reverse Voltage:
1A
1.25 A 1.5 A
2A
UT236 UT249 UT251 UT261
UT234 UT242 UT252 UT262
UT235 UT244 UT254 UT264
UT237 UT245 UT255 UT265
UT238 UT247 UT257 UT267
UT361 UT362 UT258 UT268
UT347 UT363 UT364
-
Forward Surge Current (Peak)
1 & 1.25 Amp Series
@ 8.3 ms
1.5 Amp Series
2 Amp Series
1 Amp Series
Average Rectified Output Current
o
1.25 Amp Series
@ T
L
= +25 C
1.5 Amp Series
2 Amp Series
Average Rectified Output-Current
o
@ T
A
= +100 C
1 Amp Series
1.25 Amp Series
1.5 Amp Series
2 Amp Series
Symbol
T
J
/T
STG
R
ӨJL
Value
Unit
o
-65 to +175
C
See
Derating Curves
V
RWM
I
FSM
I
O1
I
O2
Solder Temperature @ 10 s
T
SP
100
200
400
500
600
800
1000
20
25
30
1.0
1.25
1.5
2.0
0.5
0.65
0.75
1.0
260
V
A
A
MSC – Lawrence
6 Lake Street,
Lawrence, MA 01841
Tel: 1-800-446-1158 or
(978) 620-2600
Fax: (978) 689-0803
MSC – Ireland
Gort Road Business Park,
Ennis, Co. Clare, Ireland
Tel: +353 (0) 65 6840044
Fax: +353 (0) 65 6822298
Website:
www.microsemi.com
A
o
C
T4-LDS-0289, Rev. 1 (121796)
©2012 Microsemi Corporation
Page 1 of 8
UT236 – UT347, UT249 – UT363,
UT251 – UT364 and UT261 – UT268
MECHANICAL and PACKAGING
•
•
•
•
•
•
•
CASE: Hermetically sealed voidless hard glass with tungsten slugs.
TERMINALS: Tin/lead or RoHS compliant matte/tin over nickel plated over copper.
MARKING: Orange band indicates “UT”, part number printed on body.
POLARITY: Indicated by orange band.
TAPE & REEL option: Standard per EIA-296. Consult factory for quantities.
WEIGHT: Approximately 0.26 grams.
See
package dimensions
on last page.
PART NOMENCLATURE
UT
Series Designation
Series number
(see
Electrical Characteristics
table)
236
(e3)
RoHS Compliance
e3 = RoHS compliant
Blank = non-RoHS compliant
Symbol
I
F
I
FSM
I
O
T
J
V
F
V
RWM
SYMBOLS & DEFINITIONS
Definition
Forward Current: The forward current dc value, no alternating component.
Maximum Forward Surge Current: The forward current, surge peak or rated forward surge current.
Average Rectified Output Current: Output current averaged over a full cycle with a 50 Hz or 60 Hz sine-wave input and
a 180 degree conduction angle.
Junction Temperature: The temperature of a semiconductor junction.
Maximum Forward Voltage: The maximum forward voltage the device will exhibit at a specified current.
Working Peak Reverse Voltage: The maximum peak voltage that can be applied over the operating temperature
range.
T4-LDS-0289, Rev. 1 (121796)
©2012 Microsemi Corporation
Page 2 of 8
UT236 – UT347, UT249 – UT363,
UT251 – UT364 and UT261 – UT268
ELECTRICAL CHARACTERISTICS
@ 25 ºC unless otherwise noted
WORKING PEAK
REVERSE
VOLTAGE
MAXIMUM
FORWARD
VOLTAGE DROP
MAXIMUM LEAKAGE
CURRENT
@
V
RWM
µA
Volts
100
200
400
500
600
800
100
200
400
500
600
800
1000
100
200
400
500
600
800
1000
100
200
400
500
600
800
1000
Volts
25 C
o
V
RWM
TYPE
UT261
UT262
UT264
UT265
UT267
UT268
UT251
UT252
UT254
UT255
UT257
UT258
UT364
UT249
UT242
UT244
UT245
UT247
UT362
UT363
UT236
UT234
UT235
UT237
UT238
UT361
UT347
.
100 C
o
1 V @ 900 mA
2
75
1 V @ 750 mA
2
75
1 V @ 500 mA
2
75
1 V @ 400 mA
2
75
T4-LDS-0289, Rev. 1 (121796)
©2012 Microsemi Corporation
Page 3 of 8
UT236 – UT347, UT249 – UT363,
UT251 – UT364 and UT261 – UT268
GRAPHS
% of Specified Surge Current Rating
Cycles at 60 Hz Half Sine Wave
FIGURE 1
Allowable Forward Surge Current vs Number of Cycles
% of Specified Surge Current Rating
Frequency (H
Z
) -
Half Wave Resistive Load No Filter
FIGURE 2
Efficiency vs Frequency at Rated Current (Sine Wave)
T4-LDS-0289, Rev. 1 (121796)
©2012 Microsemi Corporation
Page 4 of 8
UT236 – UT347, UT249 – UT363,
UT251 – UT364 and UT261 – UT268
GRAPHS
I
o
– Average Rectified Current (A)
T
L
– Lead Temperature (°C)
FIGURE 3
Maximum Current vs Lead Temperature
I
o
– Average Rectified Current (A)
T
L
– Lead Temperature (°C)
FIGURE 4
Maximum Current vs Lead Temperature
T4-LDS-0289, Rev. 1 (121796)
©2012 Microsemi Corporation
Power (W) @ T
J
=175°C
Power (W) @ T
J
= 175 °C
Page 5 of 8
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