PSA/PSR Series Positive Switching Regulator The PSA/PSR Series of positive switching regulators are designed as power supplies for electronic systems when 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 especially designed for secondary-switched and battery-driven mobile applications. The regulators are suitable for railway applications according to EN 50155 and EN 50121. The case design allows for operation up to 71 C. The PSA/PSR Series are designed for wall or chassis mounting with faston connections or with solder pins for insertion into a PCB. Various options are available to adapt the regulators 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 to 48 VDC No input-to-output isolation High efficiency up to 95% Extremely wide input voltage range Low input-to-output differential voltage Very good dynamic properties Input undervoltage lockout Output voltage adjustment and inhibit function 25 Continuously no-load and short-circuit proof 1.0 All boards are coated with a protective lacquer 50 Boards or chassis mountable 70 2.0 2.8 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 BCD20025-G Rev AG, 22-Mar-2019PSA/PSR Series Positive Switching Regulator Model Selection Table 1: Model Selection 2 Output Output Operating input Nom. input voltage Efficiency Type Options voltage current voltage range designation V V I A V V V V % % o nom o nom i o nom min max 5 2 8 - 80 40 71.5 74 PSR52-7 Y 5 3 8 - 80 40 77 79 PSR53-9G -7, i, P, R, Y, non-G 5 4 7 - 40 20 82 83 PSR54-9iG -7, P, R, Y, non-G 5 5 7 - 35 20 81 83 PSA55-9iG -7, R, Y, non-G 3 5.1 2 8 - 80 20 75 - PSA5A2-2 iRY 3 5.1 5 7 - 35 20 83 - PSA5A5-2 -7, iRY 1 12 1.5 18 - 144 60 86 87 PSA121.5-9iRG -7, Y, non-G 12 2.5 15 - 80 40 86 87 PSR122.5-9iG -7, P, R, Y, non-G 3 12 3 15 - 40 20 89 - PSA123-2 iRY 1 15 1.5 22 - 144 60 86 87 PSA151.5-9iRG -7, Y, non-G 15 2.5 19 - 80 40 88 89 PSR152.5-9G -7, P, R, Y, non-G 3 15 3 19 - 40 30 90 - PSA153-2 iRY 1 24 1.5 31 - 144 60 92 93 PSA241.5-9iRG -7, Y, non-G 24 2 29 - 80 50 91 92 PSR242-9iG -7, P, R, Y, non-G 3 24 2.5 29 - 60 40 93 - PSA242.5-2G iRY , non-G 1 36 1.2 44 - 144 80 93 95 PSA361-9iRG -7, Y, non-G 36 2 42 - 80 60 92 94 PSR362-9iRG -7, Y, non-G 1 48 1 58 - 144 80 93 95 PSA481-9iRG -7, Y, 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 Options iRY in a package NFND: Not for new designs. Preferred for new designs. Note: The output voltage V is adjusted to 108% of V for all models with option P or R, if they dont have option Y in addition. o o nom PSA 12 1.5 -9 i R G Part Number Description Positive switching regulator in case A01 .........PSA or PSR Nominal output voltage in Volt ................................. 5 to 48 Nominal output current in Ampere ............................. 1 to 5 Operational ambient temperature range T A 10 to 50 C ........................................................ -2 25 to 50 C (customer-specific models) .............. -5 25 to 71 C (option) ........................................... -7 40 to 71 C ....................................................... -9 other (customer-specific models) ........................-0 i Inhibit input (standard for all -7 and -9 models) ................. 1 R Control input for output voltage adjustment ................... 1 Potentiometer (option, NFND) ....................................... P G RoHS-compliant for all 6 substances .............................. 1 Option P excludes feature R. Note: The sequence of options must follow the order above. Example: PSA121.5-9iRG designates a positive switching regulator with an output 12 V, 1.5 A, ambient temperature 40 to 71 C, inhibit input, output voltge adjust by R-pin, RoHS-compliant for all 6 substances. tech.support psbel.com belfuse.com/power-solutions BCD20025-G Rev AG, 22-Mar-2019 2019 Bel Power Solutions & Protection Page 2 of 17