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QM48T45 Family DC-DC Converter Data Sheet
36-75 VDC Input; 1.0-3.3 VDC @ 45 A Output
Pad/Pin Connections
Pad/Pin #
1
Function
Vin (+)
1
8
7
2
ON/OFF
2
3
TOP VIEW
6
5
4
3
4
Vin (-)
Vout (-)
5
6
SENSE(-)
TRIM
SIDE VIEW
QM48T Pinout (Through-hole)
?
?
?
?
?
7
8
SENSE(+)
Vout (+)
QM48T Platform Notes
All dimensions are in inches [mm]
Pins 1-3 and 5-7 are ? 0.040” [1.02]
with ? 0.078” [1.98] shoulder
Pins 4 and 8 are ? 0.062” [1.57] without
shoulder
Pin Material: Brass
Pin Finish: Tin/Lead over Nickel or
Height
Option
A
B
D
HT
(Max. Height)
+0.000 [+0.00]
-0.038 [- 0.97]
0.325 [8.26]
0.358 [9.09]
0.422 [10.72]
CL
(Min. Clearance)
+0.016 [+0.41]
-0.000 [- 0.00]
0.030 [0.77]
0.063 [1.60]
0.127 [3.23]
Pin
Option
A
B
C
PL
Pin Length
±0.005 [±0.13]
0.188 [4.77]
0.145 [3.68]
0.110 [2.79]
?
Matte Tin over Nickel for “G” version
Converter Weight: 1.1 oz [31.5 g] typical
Converter Part Numbering/Ordering Information
Product
Series
Input
Voltage
Mounting
Scheme
Rated
Load
Current
Output
Voltage
ON/OFF
Logic
Maximum
Height
[HT]
Pin
Length
[PL]
Special
Features
Environ-
mental
QM
48
T
45
033
-
N
B
A
0
No Suffix
Quarter-
Brick
Format
36-75 V
T ?
Through-
hole
45 ADC
010 ? 1.0 V
012 ? 1.2 V
015 ? 1.5 V
018 ? 1.8 V
020 ? 2.0 V
025 ? 2.5 V
033 ? 3.3 V
N ?
Negative
P ?
Positive
Through
hole
A ? 0.325”
B ? 0.358”
D ? 0.422”
Through
hole
A ? 0.188”
B ? 0.145”
C ? 0.110”
0 ? STD
? RoHS
lead-solder-
exemption
compliant
G ? RoHS
compliant
for all six
substances
The example above describes P/N QM48T45033-NBA0: 36-75 V input, through-hole mounting, 45 A @ 3.3 V output, negative ON/OFF logic, a
maximum height of 0.358”, a through the board pin length of 0.188”, and Eutectic Tin/Lead solder. Please consult factory for the complete list of
available options .
Models highlighted in yellow or shaded are not recommended for new designs.
NUCLEAR AND MEDICAL APPLICATIONS - Power-One products are not designed, intended for use in, or authorized for use as critical
components in life support systems, equipment used in hazardous environments, or nuclear control systems without the express written
consent of the respective divisional president of Power-One, Inc.
TECHNICAL REVISIONS - The appearance of products, including safety agency certifications pictured on labels, may change depending on
the date manufactured. Specifications are subject to change without notice.
MCD10073 Rev. 1.0
Page 36 of 36
www.power-one.com
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