*R oH S CO M PL IA N T Features n Hybrid protection technology n UL1449 4th Edition n Extremely low leakage current n RoHS compliant* n Heavy duty surge protection n LED indicators and audible alarm n Compact form factor LE AD FR EE n Indoor or outdoor installation 1251 Series Hardwired AC Hybrid Surge Protective Device (H-SPD) General Information Electrical Characteristics Ro VE LEA HS RS D CO ION FRE M SA E PL R IA E NT * The Bourns(R) Model 1251 Series is a Type 1 hardwired hybrid surge protective device targeted for AC infrastructure applications. The hybrid Model 1251 design combines fast responding MOV technology with low leakage GDT technology resulting in reliable and long term performance. Characteristic Electrical Distribution System Nominal (Operating) Voltage Maximum Operating Voltage Temporary Overvoltage Withstand Nominal Discharge Current in 15 Applications of 8/20 s Impulse Waveform Maximum Discharge Current 8/20 s Withstand Single Operation Overvoltage Protection Rating (3 kA) Protection Level at In Short Circuit Current Rating Model No. 1251-120S 1251-208Y 1251-240S 120 VAC Single Ph 120 / 208 VAC 3 Ph Wye 120 / 240 VAC Single Ph 120 VAC 120 / 208 VAC 120 / 240 VAC MCOV 150 VAC UT 150 VAC In 20 kA Imax 50 kA Vpr Up-In Isccr Disconnection Features / Options Thermal Disconnect................................................................................................ Internal Fuses or Circuit Breakers............................................................................................. 40 A Ground Fault Breaker (if Installed).............................................................Type S or Delay Mechanical Characteristics Enclosure............................................................................................................ Aluminum Environmental Rating................................................................................IP 66 / NEMA 4x Operating Temperature..............................................................................-40 C to +85 C Mounting.......................................................................................................Bulkhead (3/4) Weight......................................................................................................................2.5 lbs. Disconnection Indicator.........................................................LED off and audible alarm on Electrical Connection.....................................12 AWG wiring leads, 20 inches max. length Mechanical Connection to Panel........................12 gauge, straight nipple with conduit nut for mounting through 0.5 inch knockout (actual hole size 0.875 inch) 700 VAC 1200 VAC 100 kA How To Order 1251 - xxxx - xx Series Nominal (Operating) Voltage 120S = 120 VAC 208Y = 120/208 VAC 240S = 120/240 VAC Configuration N1= Wiring/Nipple Right Side Exit N2 =Wiring/Nipple Rear Exit Packaging Specifications 1251 Series.................... one unit per box Standards Compliance UL1449 4th Edition, Type 1.................................................................................. E313168 CEI 61643-1, International............................................... Low Voltage SPD - Test Class II EN 61643-11, Europe....................................................... Low Voltage SPD - Test Class II *RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011. Specifications are subject to change without notice. The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time. Users should verify actual device performance in their specific applications. AC Power Surge 88 Protective Device s 1252-240S-N1 (3.47) 88 65 (2.56) Applications(3.47) n Service entrance, branch and OEM panels n Electrical infrastructures 1252 Series AC Power n Equipment and systems Surge Protective Device www.bourns.com n Protection from lightning 88 from AC power-induced problems n Protection 1252-240S-N1 88 (3.47) 65 (2.56) (3.47) 1252 Series AC Power 1251 Series Hardwired AC Hybrid Surge Protective Device (H-SPD) Surge Protective Device www.bourns.com 88 (3.47) Product Dimensions 65 (2.56) N1 Configuration M22 1252 Series www.bourns.com M22 15.49 (0.61) 102.11 (4.02) 15.49 (0.61) M22 59.69 (2.35) 102.11 (4.02) 59.69 (2.35) 87.88 (3.46) 15.49 (0.61) M22 N2 Configuration 102.11 (4.02) 59.69 (2.35) 87.88 (3.46) 15.49 (0.61) M22 102.11 (4.02) 87.88 (3.46) 15.49 (0.61) 59.69 (2.35) M22 102.11 (4.02) DIMENSIONS: M22 59.69 (2.35) 87.88 (3.46) MM (INCHES) 15.49 (0.61) 102.11 (4.02) 59.69 (2.35) 87.88 (3.46) Asia-Pacific: Tel: +886-2 2562-4117 * Email: asiacus@bourns.com EMEA: Tel: +36 88 520 390 * Email: eurocus@bourns.com The Americas: Tel: +1-951 781-5500 * Email: americus@bourns.com www.bourns.com 87.88 (3.46) 15.49 (0.61) 102.11 (4.02) 59.69 (2.35) REV. 07/16 Specifications are subject to change without notice. The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time. Users should verify actual device performance in their specific applications.