21/136 Series - Transfer Relays DPDT, 30 Amps The 21 and 136 series ash transfer relays have a proven industry record of reliability. Their rugged design has allowed the products to be plugged in and left, for years of service. Recent changes in lighting techniques from incandescent to LED have prompted us to respond with an optional contact design (Code 33) better suited for the low currents of LED lighting, but equally usable with tungsten lamps. GENERAL SPECIFICATIONS ( 25 C) 136 Series Contacts: 21 Series Contact Conguration DPDT DPDT Silver Alloy Contact Material Silver Alloy Contact Rating 30 Amp 120 / 240VAC Resistive 30 Amp 20 Amp 28VDC Resistive 20 Amp Motor 120VAC 1 Phase 1 1/2Hp 1/4Hp - Motor 240VAC 3 Phase 2Hp 20 Amp 120VAC Tungsten 20 Amp 100 milliohms max 6VDC Contact Resistance, Initial 100 milliohms max 6VDC Coil: AC Coils Available AC and DC 6VA Nominal Coil Power 2.4VA 85% to 110% of nominal Input Voltage Tolerance - AC 75% to 110% of nominal The 21 series coil is rectied 75% to 110% of nominal Input Voltage Tolerance - DC 70% to 110% of nominal which provides chatter free Drop-out voltge 10% of nominal 10% of nominal operation in brownout Continuous Duty Continuous conditions down to 85VAC and will not overheat up to Timing: 130VAC. Rectied coils also 20 mS Operate Time (max) 20 mS provide less power con- Release Time (max) 20 mS 20 mS sumption and less heating. Dielectric Strength: 500Vrms Across Open Contacts 500Vrms 1500Vrms Between mutually insulated point 1500Vrms The 136 Series is a straight Insulation resistance 1,000 Mohms min 500VDC 1,000 Mohms min 500VDC AC operated coil with a copper shading ring instead Temperature: of a rectied coil. -34 to 74C (-30 to 165F) Operating -34 to 74C (-30 to 165F) -40 to 105C (-40 to 221F) Storage -40 to 105C (-40 to 221F) Life Expectancy: 100,000 Electrical (full load) 200,000 5,000,000 Mechanical (no load) 5,000,000 Miscellaneous: Any Mounting Position Any Clear Polycarbonate Enclosure Clear Polycarbonate 8.1oz (230 grams) Weight 7.2oz (205 grams) Mating Socket SK-TRF8-BFW-1 SK-TRF8-BFW-1 1/3 wwwwww..struthers-dunn.comstruthers-dunn.com (843) 346-4427(843) 346-4427 1550General Purpose Relays Outline Dimensions Dimensions Shown in inches & (millimeters) Wire Diagram 2.77 (70.4) 3.84 (97.6) .60 (15.2) .46 (11.8) 2.12 (53.9) 1.00 (25.4) 0.06 (1.5) 1.75 .50 (44.5) (12.7) 0.25 Polarizing Pin .43 (6.3) (11.0) 2.37 (60.3) Newly Available 21 Legacy Ordering Code 21 XBX P 120VAC Part Number Chart Series Part numbers Alternate Part Number & 21 Voltage 21ACPX-2 21XBXP-120VAC 21ACPX-8 21XBXP-240VAC Contact Arrangement XBX - (2 form C - DPDT) May also order Optional Features Part numbers/Midtex Type Voltage Polycarbonate cover - CODE P 136-62T3A1 120VAC Light Pipe for coil voltage indicator - CODE L *Gold diffused, serrated contacts - CODE 33 Coils Available AC and DC Coil Voltage Nominal Coil Power 2.4VA AC: 120, 240 (Add VAC) Input Voltage Tolerance AC 75% to 110% of nominal DC: 12, 24 (Add VDC) Coil voltages and frequencies must be specied Input Voltage Tolerance DC 70% to 110% of nominal Drop Out Voltage 10% of nominal *Ideal for LED lamp applications Duty Continuous 1/4 wwwwww..struthers-dunn.comstruthers-dunn.com ((843) 346-4427843) 346-4427 1550 Section 1