PSB Series
Positive Switching Regulator
The PSB Series of positive switching regulators are designed as
power supplies for electronic systems, where no input-to-output
isolation is required. Their major advantages include a high
level of efficiency, high reliability, low output ripple, and excellent
dynamic response. Models with input voltages up to 144 V are
specially designed for secondary switched and battery-driven
mobile applications. The converters are suitable for railway
applications according to EN 50155 and EN 50121.
The case design allows for operation up to 71 C. The PSB Series
is designed for wall or chassis mounting with faston connectors.
Various options are available to adapt the converters to different
applications.
Features
RoHS lead-free-solder and lead-solder-exempted
products are available
5 year warranty for RoHS compliant products with an
extended temperature range
Input voltage up to 144 VDC
Single output of 5.1 to 48 VDC
No input-to-output isolation
High efficiency up to 96%
Extremely wide input voltage range
32
Low input-to-output differential voltage
1.3"
69
Very good dynamic properties
106
2.7"
Input undervoltage lockout
4.2"
Output voltage adjustment and inhibit function
Continuously no-load and short-circuit proof
All boards are coated with a protective lacquer
Safety-approved to the latest edition of IEC/EN 60950-1
and UL/CSA 60950-1
Table of Contents
Description............................................................................1 Electromagnetic Compatibility (EMC) .................................11
Model Selection ....................................................................2 Immunity to Environmental Conditions ...............................12
Mechanical Data .................................................................13
Functional Description ..........................................................3
Electrical Input Data .............................................................4 Safety and Installation Instructions .....................................14
Electrical Output Data...........................................................6 Description of Options ........................................................15
Auxiliary Functions .............................................................10 Accessories ........................................................................16
belfuse.com/power-solutions
BCD20026-G Rev AD, 04-Sep-2018PSB Series
Positive Switching Regulator
Model Selection
Table 1: Model Selection
2
Output Output Operating input Nom. input voltage Efficiency Type designation Options
voltage current voltage range
V [V] I [A] V [V] V [V] [%] [%]
o nom o nom i i nom min max
3 1
5.1 4 15 - 144 60 76 80 PSB5A4-9iRG L, C
5.1 6 8 - 80 40 79 82.5 PSB5A6-9iRG -7, L, C, non-G
5.1 7 7 - 40 20 83 84.5 PSB5A7-9iRG -7, L, P, C, non-G
5.1 8 7 - 40 20 82.5 84 PSB5A8-2iRG non-G
4 1
12 3 18 - 144 60 87 88.5 PSB123-9iRG -7, L, C, non-G
12 5 15 - 80 40 89 90.5 PSB125-9iRG -7, L, C, non-G
12 6 15 - 40 20 89.5 91 PSB126-2iRG ---
4 1
15 3 22 - 144 60 89 90 PSB153-9iRG -7, L, C, non-G
15 5 19 - 80 40 90.5 92.5 PSB155-9iRG -7, L, C, non-G
15 6 19 - 40 30 91 92.5 PSB156-2iRG ---
4 1
24 3 31 - 144 60 92.5 94 PSB243-9iRG -7, L, C, non-G
24 5 29 - 80 50 93.5 95 PSB245-9iRG -7, L, C, non-G
24 6 29 - 60 40 94 96 PSB246-2iRG non-G
4 1
36 3 44 - 144 80 94 95 PSB363-9iRG -7, L, C, non-G
36 5 42 - 80 60 95.5 96.5 PSB365-9iRG -7, L, C, non-G
4 1
48 3 58 - 144 80 95.5 96.5 PSB483-9iRG -7, L, C, non-G
1
Surges up to 156 V for 2 s; see Electrical Input Data
2
Efficiency at V and I
i nom o nom
3
I = 5 A at V 80 V; for V > 80 V, see fig. 4.
o max i i
4
I = 4 A at V 80 V; for V > 80 V, see fig. 4.
o max i i
NFND: Not for new designs. Preferred for new designs.
Note: The sequence of options must follow the order above.
PSB 12 3 -9 L i R C G
Part Number Description
Positive switching regulator in case B02 ..................... PSB
Nominal output voltage in volt .............................. 5.1 to 48
Nominal output current in Ampre ............................. 3 to 8
Operational ambient temperature range T
A
10 to 50 C ....................................................... -2
25 to 50 C ....................................................... -5
25 to 71 C (option) .......................................... -7
40 to 71 C ........................................................ -9
other (customer-specific models) ........................ -0
Input filter (option) ..............................................................L
Inhibit input (standard) ........................................................i
1
Control input for output voltage adjustment ...................R
1
Potentiometer (option) ................................................... P
Thyristor crowbar (option).................................................C
G
RoHS-compliant for all 6 substances ..............................
1
Feature R excludes option P and vice versa.
Note: The sequence of options must follow the order above.
Example: PSB123-9LiRCG designates a positive switching regulator with output 12 V, 3 A, ambient temperature range of
40 to 71 C, input filter, inhibit input, output adjust input, thyristor crowbar, and RoHS-compliant.
tech.support@psbel.com
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BCD20026-G Rev AD, 04-Sep-2018
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