ST 1a1b/2a 8A FEATURES 1. Even with small form factor, sensitive enough for direct ICdriving The dimensions of this high-density 4-gap balanced armature are 31 mm 14 mm 11 mm 1.220 inch .551 inch .433 inch. Despite this small size, high sensitivity is achieved by a mechanism that incorporates highefficiency polarized magnetic circuits along with our exclusive spring alignment method. With an minimum operating power of about 150 mW, nominal operating power of 240 mW, this relay can be directly driven by transistor or chip controllers. 2. High switching capability Strong against lamp inductive loads, maximum switching capacity has reached 3,040 VA (8A 380V AC). 3. High breakdown voltage - Optimal for control in 250 V power circuits High breakdown voltage has been achieved. Between contacts and coil of 3,750 Vrms; Surge breakdown voltage between coil and contact of 6,000 V, and between open contacts of 1,200 Vrms mean that these relays are suitable even for 250 V power circuit control. 4. Improved stability Conforms to all types of safety standards. Insulating distance of more than 3 mm secured, approx. 4 mm. Complies with Japan Electrical Appliance and Material Safety Law requirements for operating 200 V power supply circuits, and conforms with UL, CSA and VDE standards. 5. Latching types available In addition to single side stable types, convenient 2 coil latching types with memory functions are also available. Moreover, we offer 2 Form A specifications which, with double pole switching for applications such as 250 V power circuit switching, can enable safer designs. ST RELAYS 6. Automatic cleaning possible The sealed design means that these relays can undergo immersion in automatic washing systems and are suitable for automatic soldering. Even in difficult environments, the contacts remain reliable. 7. Easy to design PC board patterns Features 4/10 dual-in-line terminals. Because the lead spacing has a pitch greater than 7.54 mm .297 inch, designers can make easy adjustments with the width of the land size. This, along with the large insulation distance, simplifies the drawing of PC board patterns. 8. To improve soldering efficiency, preapplication of solder to the terminals is recommended. 9. Sockets are available. ORDERING INFORMATION ST F Contact arrangement 1: 1 Form A 1 Form B 2: 2 Form A Operating function Nil: Single side stable L: 1 coil latching L2: 2 coil latching Coil voltage DC 3, 5, 6, 9, 12, 24, 48 V Contact material F: AgSnO2 type contact Note: UL/CSA, VDE type is standard. ds_61A09_en_st: 070313D 1 ST TYPES Contact arrangement Nominal coil voltage 1 Form A 1 Form B 2 Form A 3V DC 5V DC 6V DC 9V DC 12V DC 24V DC 48V DC 3V DC 5V DC 6V DC 9V DC 12V DC 24V DC 48V DC Single side stable Part No. ST1-DC3V-F ST1-DC5V-F ST1-DC6V-F ST1-DC9V-F ST1-DC12V-F ST1-DC24V-F ST1-DC48V-F ST2-DC3V-F ST2-DC5V-F ST2-DC6V-F ST2-DC9V-F ST2-DC12V-F ST2-DC24V-F ST2-DC48V-F 1 coil latching Part No. ST1-L-DC3V-F ST1-L-DC5V-F ST1-L-DC6V-F ST1-L-DC9V-F ST1-L-DC12V-F ST1-L-DC24V-F ST1-L-DC48V-F ST2-L-DC3V-F ST2-L-DC5V-F ST2-L-DC6V-F ST2-L-DC9V-F ST2-L-DC12V-F ST2-L-DC24V-F ST2-L-DC48V-F 2 coil latching Part No. ST1-L2-DC3V-F ST1-L2-DC5V-F ST1-L2-DC6V-F ST1-L2-DC9V-F ST1-L2-DC12V-F ST1-L2-DC24V-F ST1-L2-DC48V-F ST2-L2-DC3V-F ST2-L2-DC5V-F ST2-L2-DC6V-F ST2-L2-DC9V-F ST2-L2-DC12V-F ST2-L2-DC24V-F ST2-L2-DC48V-F Standard packing: Tube: 50 pcs.; Case: 500 pcs. RATING 1. Coil data 1) Single side stable Nominal coil voltage 3V DC 5V DC 6V DC 9V DC 12V DC 24V DC 48V DC Pick-up voltage (at 20C 68F) Drop-out voltage (at 20C 68F) 80%V or less of nominal voltage (Initial) 10%V or more of nominal voltage (Initial) Pick-up voltage (at 20C 68F) Drop-out voltage (at 20C 68F) Nominal operating current [10%] (at 20C 68F) 78mA 47mA 40mA 25mA 20mA 10mA 5mA Coil resistance [10%] (at 20C 68F) Nominal operating power Max. allowable voltage (at 20C 68F) 38 105 150 360 600 2,400 9,000 240mW 150%V of nominal voltage Coil resistance [10%] (at 20C 68F) Nominal operating power Max. allowable voltage (at 20C 68F) 130mW 150%V of nominal voltage 2) 1 coil latching Nominal coil voltage Nominal operating current [10%] (at 20C 68F) 3V DC 37mA 80 5V DC 21mA 230 18mA 330 6V DC 9V DC 12V DC 80%V or less of nominal voltage (Initial) 10%V or more of nominal voltage (Initial) 12mA 730 9mA 1,300 24V DC 5mA 5,000 48V DC 2.7mA 18,000 3) 2 coil latching Nominal coil voltage 3V DC 5V DC 6V DC 9V DC 12V DC 24V DC 48V DC 2 Set voltage (at 20C 68F) 80%V or less of nominal voltage (Initial) Reset voltage (at 20C 68F) 80%V or less of nominal voltage (Initial) Nominal operating current [10%] (at 20C 68F) Set coil Reset coil 75mA 75mA 45mA 45mA 37mA 37mA 25mA 25mA 18mA 18mA 10mA 10mA 4.7mA 4.7mA Coil resistance [10%] (at 20C 68F) Set coil 40 110 155 360 640 2,400 10,200 Reset coil 40 110 155 360 640 2,400 10,200 Nominal operating power Set coil Reset coil 240mW 240mW Max. allowable voltage (at 20C 68F) 150%V of nominal voltage ds_61A09_en_st: 070313D ST 2. Specifications Characteristics Item Arrangement Contact material Initial contact resistance, max. Max. switching power (resistive load) Max. switching voltage Max. switching current Minimum operating power Nominal operating power Min. switching capacity (Reference value)*1 Insulation resistance (Initial) (at 25C, 50% relative humidity) Between open contacts Breakdown voltage Between contact sets (Initial) Between contact and coil Surge breakdown voltage (Initial)*2 Contact Rating Electrical characteristics Specifications 1 Form A 1 Form B, 2 Form A Au-flashed AgSnO2 type Max. 30 m (By voltage drop 6 V DC 1A) 3,040 VA, 150 W 380 V AC, 250 V DC 8A 150mW (Single side stable, 2 coil latching) 240mW (Single side stable, 2 coil latching) 100 mA 5V DC Min. 1,000M (at 500V DC) Measurement at same location as "Initial breakdown voltage" section. 1,200 Vrms for 1 min. (Detection current: 10 mA) 2,000 Vrms for 1 min. (Detection current: 10 mA) 3,750 Vrms for 1 min. (Detection current: 10 mA) 6,000 V (Between contact and coil) Max. 15 ms [Max. 15 ms] (Nominal voltage applied to the coil, excluding contact bounce time.) Max. 10 ms [Max. 15 ms] (Nominal voltage applied to the coil, excluding contact bounce time.) (without diode) Max. 55C (By resistive method, nominal voltage applied to the coil; contact carrying current: 8A.) Min. 196 m/s2 (Half-wave pulse of sine wave: 11 ms; detection time: 10s.) Min. 980 m/s2 (Half-wave pulse of sine wave: 6 ms.) 10 to 55 Hz at double amplitude of 2 mm (Detection time: 10s.) 10 to 55 Hz at double amplitude of 3 mm Min. 107 (at 180 times/min.) Min. 105 (8 A 250 V AC resistive) (ON : OFF = 1 s : 5 s) Ambient temperature: -40C to +60C -40F to +140F; Humidity: 5 to 85% R.H. (Not freezing and condensing at low temperature) 20 times/min.*4 Approx. 10g .353 oz Operate time [Set time] (at 20C 68F) Release time [Reset time] (at 20C 68F) Temperature rise (at 60C 140F) Functional Destructive Functional Vibration resistance Destructive Mechanical Electrical Shock resistance Mechanical characteristics Expected life Conditions for operation, transport and storage*3 Conditions Max. operating speed Unit weight *1 This value can change due to the switching frequency, environmental conditions, and desired reliability level, therefore it is recommended to check this with the actual load. *2 Wave is standard shock voltage of 1.250s according to JEC-212-1981. *3 Refer to "6. Usage, Storage and Transport Conditions" in AMBIENT ENVIRONMENT section in Relay Technical Information. *4 The max. operating speed amounts to 30cps without load. REFERENCE DATA 2. Coil temperature rise 10 AC resistive load AC inductive load (cos=0.4) 2 DC resistive load 1 0.5 Temperature rise, C Current, A 5 DC inductive load (L/R=40ms) 3. Influence of adjacent mounting 100 40 90 30 Rated of change, % 1. Max. switching power 80 70 60 Contact current 8A 50 0A 40 30 0 Pick-up voltage -10 -20 -30 10 20 Drop-out voltage 10 20 0.2 0 20 50 100 200 300 Voltage, V ds_61A09_en_st: 070313D 600 1000 0 0.2 0.4 0.6 0.8 1.0 Coil operating power, W 1.2 -40 5 10 15 20 Inter-relay distance, mm 3 ST DIMENSIONS(mm inch) CAD Data Data from our Web site. Download CAD External dimensions CAD Data PC board pattern (Bottom view) 2 coil latching types only. 14 .551 31.0 1.220 11.0 .433 0.3 .012 3.5 .138 7.62 .300 10.16 .400 1.0 .039 1 8 2.54 .100 7.62 .300 0.3 .012 0.6 dia. .024 dia. 2 3 7 6 10.16 .400 8-1.4 dia. 8-.055 dia. 2.54 .100 Tolerance: 0.1 .004 4 5 0.5 .020 1.0 .039 1.0 .039 General tolerance: 0.5 .020 Schematic (Bottom view) Single side stable / 1 coil latching 1 Form A 1 Form B 2 Form A 1 8 - + 7 6 4 1 5 8 - + 7 6 2 coil latching 1 Form A 1 Form B 2 Form A 4 1 5 8 (Deenergized condition) - + 2 3 7 6 + - 4 1 5 8 - + 2 3 7 6 + - 4 5 (Reset condition) SAFETY STANDARDS UL/C-UL (Recognized) File No. Contact rating E43028 8A 250V AC 1/4HP 125, 250V AC 5A 30V DC File No. LR26550 etc. CSA (Certified) Contact rating 8A 250V AC / HP 125, 250V AC 5A 30V DC 1 4 File No. 1017 VDE (Certified) Contact rating 8A 250V AC (cos=1.0) 4A 250V AC (cos=0.4) 5A 30V DC TV rating (UL/CSA) File No. Rating UL: E43028 CSA: LR26550 -- NOTES 1. PC board patterns for 2 coil latching types When applying relays in power supply operation circuits for finished products regulated by the Electrical Appliance and Material Safety Law, use the pattern shown below. Terminal No. 1 2 3 4 2. Soldering should be done under the following conditions: 1) 250C 482F within 10s 300C 572F within 5s 350C 662F within 3s 2) For automatic cleaning, the boiling method is recommended. Avoid ultrasonic cleaning which subjects the relays to high frequency vibrations, which may cause the contacts to stick. It is recommended that a fluorinated hydrocarbon or other alcoholic solvents be used. 3. When using, please be aware that the a contact and b contact sides of 1 Form A and 1 Form B types may go on simultaneously at operate time and release time. For Cautions for Use, see Relay Technical Information. 4 ds_61A09_en_st: 070313D ST VDE ST RELAYS SOCKET ACCESSORIES ST relay socket SPECIFICATIONS Item Specifications Between contact and coil: 4,000 Vrms for 1 min. (Detection current: 10 mA) Between contact and terminal: 2,000 Vrms for 1 min. Min. 1,000 M between terminals (500V DC) 150C 302F for 1 hr 10 A 15 times Breakdown voltage (Initial) Insulation resistance (Initial) Heat resistance Max. continuous current Relay insertion life ST-PS PC board terminal socket DIMENSIONS (Unit: mm inch) ST-PS ST-SS 4 .158 4 .158 16.4 .646 16.4 .646 ST-SS Solder terminal socket FEATURES 7.62 .300 1. Possible to fit or remove the chassis with one touch (t = 0.6 mm to 2.2 mm .024 inch to .087 inch) 2. Easy design of PC board pattern (2.54 mm x 4 pitch DIL terminal array) 3. Complies with Japan Electrical Appliance and Material Safety Law. (UL and VDE certification) 4. High breakdown voltage. 10.16 .400 31.6 1.244 0.3 .012 4.3 .169 0.27 .011 1.05 .041 10.16 .400 14.6 .575 7.62 .300 0.3 .012 5.3 .209 5.5 .217 7.62 .300 35.4 1.394 8 7 6 5 10.16 .400 31.6 1.244 35.4 1.394 2.3 .090 0.27 .011 2 3 5.5 .217 14.6 .575 7.62 .300 8 7 6 5 1 2 3 4 16.6 .654 16.6 .654 1 10.16 .400 4 PRECAUTIONS FOR USE (SOCKET) Contact terminal interval Coil terminal interval 8 7 6 5 1 2 3 4 8-1.5 dia. 8-.060 dia. 3. Relay mounting and removal (1) Align the directions of the relay and socket. Relay 2. Chassis cutout Chassis cutting dimensions 1. PC board mounting method PC board pattern 15.00.2 .591.008 32.50.1 1.280.004 2.54 .100 Press 2.54 .100 The terminal configuration is symmetrical on the left and right, so an arrow mark is stamped on the socket to prevent misinsertion. We recommend printing the same arrow mark on the component mounting side (side opposite from pattern) of the PC board. In this case, the terminal configuration becomes the terminal nos. noted near the drilling holes. Claw for chassis fastening (2) Insert the relay all the way in, so it is securely in place. A side Chassis t = 0.6 to 2.2 .024 to .087 If the chassis hole is punched with a press, set so the release R on the front side (A side). The range for chassis thickness is 0.6 to 2.2 mm .024 to .087 inch. Hinge mechanism (3) Press the part indicated by A in the B direction, and fasten by placing the hook on the relay. Relay case cross-section B (Before fastening) A (Fastening complete) (4) When removing the relay, completely release the hooks on both sides and pull the relay out. ds_61A09_en_st: 070313D 5