PSK / PSS Series Positive Switching Regulators The PSK/PSS Series of positive switching regulators is de- signed as power supplies for electronic systems, where no input-to-output isolation is required. Their major advantages in- clude 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 con verters are suitable for railway applications according to EN 50155 and EN 50121. Two types of housing are available allowing operation up to 71 C. They are designed for insertion into a 19 DIN-rack or for chassis mounting. Replacing the heat sink by an optional cooling plate, allows chassis or wall mounting on top of a metal surface, acting as heat sink. Various options are available to adapt the converter to differ - ent applications. Connector type: H15 or H15S4, depending on 111 4.4 output current. 3 U 80 Features 168 3.2 6.6 16 TE 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 97% Extremely wide input voltage range Low input-to-output differential voltage Very good dynamic properties Input undervoltage lockout 111 4.4 Active current sharing for parallel operation 3 U Output voltage adjustment, inhibit, and sense lines Continuously no-load and short-circuit proof 60 168 2.4 All boards are coated with a protective lacquer 6.6 12 TE Safety-approved to the latest edition of IEC/EN 60950-1 and UL/CSA 60950-1 Table of Contents Description............................................................................1 Electromagnetic Compatibility (EMC) .................................14 Model Selection ....................................................................2 Mechanical Data .................................................................15 Immunity to Environmental Conditions ...............................16 Functional Description ..........................................................3 Electrical Input Data .............................................................4 Safety and Installation Instructions .....................................19 Electrical Output Data...........................................................6 Description of Options ........................................................20 Auxiliary Functions .............................................................12 Accessories ........................................................................21 belfuse.com/power-solutions BCD20029-G Rev AE, 31-Jan-2019PSK / PSS Series Positive Switching Regulators Model Selection Table 1: Model Selection 2 Output Output Operating input Nom. input Efficiency Type Connector Options 4 voltage current voltage range voltage designation type V V I A V V V V % % o nom o nom i o nom min max 5.1 20 8 - 80 40 78 79 PSK5A20-9ECKG H15 B, B1 1 12 9 18 - 144 60 90 91 PSS129-9G H15 -7, E, B, B1 12 12 15 - 80 40 90 91 PSS1212-9G H15 B, B1 1 12 12 18 - 144 60 90 91 PSK1212-9G H15 -7, E, C, B, B1 12 16 15 - 80 40 89 90 PSK1216-9G H15 -7, E, C, B, B1 12 20 15 - 80 40 89 90 PSK1220-9G H15S4 -7, E, C, K, B, B1 3 1 15 9 22 - 144 60 90 92 PSS129-9G H15 E, B, B1 3 15 12 19 - 80 40 90 92 PSS1212-9G H15 -7, E, B, B1 3 1 15 12 22 - 144 60 90 92 PSK1212-9G H15 -7, E, C, B, B1 3 15 16 19 - 80 40 89 90 PSK1216-9G H15 -7, E, C, B, B1 3 15 20 19 - 80 40 89 90 PSK1220-9G H15S4 -7, E, C, K, B, B1 1 24 9 31 - 144 60 93 94 PSS249-9G H15 -7, E, C, B, B1 24 12 29 - 80 50 93.5 94 PSS2412-9G H15 -7, E, B, B1 1 24 12 31 - 144 60 93.5 94 PSK2412-9G H15 -7, E, C, B, B1 24 14 29 - 60 40 94.5 PSS2414-2 H15 B, B1 24 16 29 - 80 50 93.5 94 PSK2416-9G H15 -7, E, C, B, B1 24 20 29 - 80 50 93.5 95 PSK2420-9G H15S4 -7, E, C, K, B, B1 1 36 9 44 - 144 80 95 96 PSS369-9G H15 -7, E, B, B1 36 12 42 - 80 60 95 94 PSS3612-9G H15 B, B1 1 36 12 44 - 144 80 95 96 PSK3612-9G H15 -7, E, C, B, B1 36 16 42 - 80 60 94.5 95 PSK3616-9G H15 -7, E, C, B, B1 36 20 42 - 80 60 94.5 95 PSK3620-9G H15S4 -7, E, C, K, B, B1 1 48 12 58 - 144 80 96 97 PSK4812-9G H15 -7, E, C, B, B1 1 Surges up to 156 V for 2 s see Electrical Input Data 2 Efficiency at V and I . Models with opt. K (standard H15 connector) exhibit approx. 1 to 2% lower efficiency. i nom o nom 3 Output voltage V set to 15 V by R input. o 4 Part numbers without suffix G use the leaded solder exemption. Note: Non-standard input/output configurations or special custom adaptations are available on request. NFND: Not for new designs. Preferred for new designs. Part Number Description PSK 12 12 -9 E C B G Positive switching regulator in case S01, K01 ........PSS, PSK Nominal output voltage in Volt .................................... 5.1 48 Nominal output current in Ampere ................................. 9 25 Operational ambient temperature range T A 10 to 50 C ......................................................-2 25 to 71 C ......................................................-7 40 to 71 C (optional) ......................................-9 Options: Inrush current limitation .......................................E Thyristor crowbar ................................................ C Standard H15 connector .....................................K Cooling plate large/small .............................. B, B1 2 RoHS-compliant for all 6 substances ............... G 1 Option P excludes R-features and vice versa. 2 G is always placed at the end of the part number. Example: PSS129-9ECB = Positive switching regulator with output 12 V, 9 A, ambient temperature range of 25 to 71 C, inrush current limitation, crowbar, and large cooling plate option B. Note: The sequence of options must follow the order above. tech.support psbel.com belfuse.com/power-solutions BCD20029-G Rev AE, 31-Jan-2019 2019 Bel Power Solutions & Protection Page 2 of 22