5. Terminal Shape P: PCB Terminals 6. Classification None : Standard ST : Stand-off 0.64 mm 15 : High-sensitivity (150 mw) Low-sensitivity

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Tabitha McCoy
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World's tandard Model! Resistant to electromagnetic interference, enables high-density mounting. Impulse withstand voltage of 1,5V meets FCC requirements.

1 World's tandard Model! Resistant to electromagnetic interference, enables high-density mounting. Impulse withstand voltage of 1,5V meets FCC requirements. old-clad twin-contacts provide short contact bounce in addition to its high contact reliability. A variety of products that cover a wide range of use. RoH Compliant Model umber Legend Application Relay Function one : ingle-side stable U : ingle-winding latching K : Double-winding latching 2. Contact Form 2: 3. Contact Type 7: Bifurcated crossbar Ag (Au-Alloy) 4. Protective tructure 4: Fully sealed 5. Terminal hape P: PCB Terminals 6. Classification one : tandard T : tand-off.64 mm 15 : High-sensitivity (15 mw) 4 : Low-sensitivity (ingle-side table: 4 mw Double-winding Latching: 3 mw) 7. Approved tandards one : tandard U : UL, CA Telecommunication equipment ecurity equipment Test & measurement equipment Ordering Information UL, CA Certified Models Relay Function Classification Model Rated coil voltage (VDC) Minimum packing unit 3, 4.5, 5, 6, 9, 12, 24 tandard -274P-T-U ingle-side table 3, 5, 6, 9, 12, 24 Low-sensitivity -274P-T4-U Type 3, 5, 6, 9, 12, 24 High-sensitivity -274P-T15-U ingle-winding 3, 4.5, 5, 6, 9, 12, 24 tandard U-274P-T-U Latching Type 25 pcs/tube 3, 4.5, 5, 6, 9, 12, 24 tandard K-274P-T-U Double-winding Latching Type 3, 5, 6, 9, 12, 24 Low-sensitivity K-274P-T4-U ote: When ordering, add the rated coil voltage to the model number. Example: -274P-T-U DC3 Rated coil voltage However, the notation of the coil voltage on the product case as well as on the packing will be marked VDC. 1

2 Ratings Coil: ingle-side table (tandard Models) ote1. The rated current and coil resistance are measured at a coil temperature of 23 C with a tolerance of ±1%. Coil: ingle-side table (Low-sensitivity Models) Max. voltage Power consumption 3 VDC VDC VDC VDC % Approx. 2 7% 1% 9 VDC VDC VDC 8.3 2,88 VDC 4.9 9,75 Approx. 235 Max. voltage Power consumption 3 VDC VDC VDC VDC % 1% 15% Approx. 4 5 VDC VDC ,44 VDC 8.3 5,76 ote1. The rated current and coil resistance are measured at a coil temperature of 23 C with a tolerance of ±1%. Coil: ingle-side table (High-sensitivity Models) Max. voltage Power consumption 3 VDC VDC VDC VDC VDC % 1% 2% Approx VDC VDC 6.3 3,84 VDC , ote1. The rated current and coil resistance are measured at a coil temperature of 23 C with a tolerance of ±1%. Coil: ingle-winding Latching ote1. The rated current and coil resistance are measured at a coil temperature of 23 C with a tolerance of ±1%. et voltage Reset voltage Max. voltage Power consumption 3 VDC VDC VDC VDC % 7% 2% Approx VDC 8.3 1,44 24 VDC 4.2 5,76 VDC , Approx. 12 2

3 Coil: Double-winding Latching (tandard Models) ote1. The rated current and coil resistance are measured at a coil temperature of 23 C with a tolerance of ±1%. Coil: Double-winding Latching (Low-sensitivity Models) et voltage Reset voltage Max. voltage Power consumption Approx. 2 3 VDC VDC VDC VDC 3 2 2% 7% 7% 9 VDC 2 45 Approx VDC VDC 7.5 3,2 VDC ,52 Approx. 2 3 VDC VDC VDC VDC VDC VDC VDC 15 1,6 VDC 7.5 6,4 ote1. The rated current and coil resistance are measured at a coil temperature of 23 C with a tolerance of ±1%. et voltage Reset voltage Max. voltage Power consumption 7% 7% 15% Approx. 36 Contacts Item Contact type Contact material Rated load Load Resistive load.5 A at 125 VAC; 2 A at 3 VDC Bifurcated crossbar Ag (Au-Alloy) contact Inductive load cos =.4; L/R = 7 ms ( ).3 A at 125 VAC; 1 A at 3 VDC Rated carry current 3 A Max. switching voltage 25 VAC, 22 VDC Max. switching current 2 A 1 A 3

4 Characteristics Item Classification ingle-side table ingle-winding Latching Double-winding Latching Contact resistance *1 5 m Operate (set) time 5 ms 5 ms Release (reset) time 3 ms 5 ms Min. set/reset signal width 1 ms Insulation resistance *2 1, M (at 5 VDC); except for set-reset Between coil and contacts 1, VAC, 5/6 Hz for 1 min Dielectric strength Between contacts of the same polarity Between contacts of different polarity 1, VAC, 5/6 Hz for 1 min 1, VAC, 5/6 Hz for 1 min Between set and reset coils 25 VAC, 5/6 Hz for 1 min Impulse withstand voltage 1,5 V (1 16 s) (conforms to FCC Part 68) Vibration Destruction 1 to 55 to 1 Hz, 2.5 mm single amplitude (5 mm double amplitude) resistance Malfunction 1 to 55 to 1 Hz, 1.65 mm single amplitude (3.3 mm double amplitude) hock Destruction 1, m/s 2 resistance Malfunction 5 m/s 2 3 m/s 2 Durability Mechanical 1,, operations (at 36, operations/hr) Electrical 5, operations (at 1,8 operations/hr) Failure rate (P level) *3 1 A at 1 m VDC Ambient operating temperature -4 C to 7 C (with no icing or no condenstion) Ambient operating humidity 5% to 85% Weight Approx. 3.5 g ote: The data shown above are initial values. *1. The contact resistance was measured with 1 ma at 1 VDC with a voltage drop method. *2. The insulation resistance was measured with a 5 VDC megohmmeter applied to the same parts as those used for checking the dielectric strength (except between the set and reset coil). *3. This value was measured at a switching frequency of 6 operations/min and the criterion of contact resistance is 5. This value may vary, depending on switching frequency, operating conditions, expected reliability level of the relay, etc. It is always recommended to double-check relay suitability under actual load conditions. 4

5 Engineering Data Maximum witching Power Durability witching current (A) DC inductive (L/R = 7 ms) DC resistive AC resistive Durability (x14 operations) 1, 5, 3, 1, VDC, resistive AC inductive (cosφ =.4) 1 3 VDC, inductive 125 VAC, resistive VAC, inductive witching voltage witching current (A) Ambient Temperature vs. Maximum Coil Voltage Ambient Temperature vs. Must Operate or Must Release Voltage Maximum coil voltage (%) , 4 mw 1, 15, 2 mw On the basis of rated voltage (%) ample: -274P umber of Relays: 1 pcs Ambient temperature ( C) Ambient temperature ( C) ote: Maximum voltage is the maximum voltage that can be applied to the Relay coil. hock Malfunction -274P K-274P Y 1, 8 1, 6 1, Z 4 2 Y 1, 8 1, 6 1, Z Z' ' 6 1, 1, 8 hock direction De-energized Y ' 1, Y' Energized Z Unit: m/s 2 Y' Z' ample: -274P 5 VDC umber of Relays: 1 pcs 2 4 Z' ' 6 1, 1, 8 hock direction Y ' 1, Y' Unit: m/s 2 Z Z' ample: K-274P 5 VDC Y' umber of Relays: 1 pcs Test Conditions: hock is applied in ±, ±Y, and ±Z directions three times each with and without energizing the Relays to check the number of contact malfunctions. 5

6 Electrical Durability Test *1 Contact Reliability Test *1, *2 On the basis of rated voltage (%) Contact resistance ample: -274P 1 umber of Relays: 1 pcs Test conditions: 125 VAC.5 A (Resistive load) 1 witching frequency: 1,8 operations/h O contact C contact Operating frequency ( 1 4 operations) Contact resistance 1, ample: -274P 5 VDC umber of Relays: 1 pcs Test conditions: Load 1 m VDC 1 ma (Resistive load) witching frequency: 7,2 operations/h O contact C contact *1. The tests were conducted at an ambient temperature of 23ºC. *2. The contact resistance data are periodically measured reference values and are not values from each monitoring operation. Contact resistance values will vary according to the switching frequency and operating environment, so be sure to check operation under the actual operating conditions before use , 3, Operating frequency ( 1 4 operations) Mutual Magnetic Interference -274P -274P 2.54 mm ample Change rate on the basis of initial value (%) Initial stage Test Average value 2.54 mm Deenergized Deenergized Deenergized ample Change rate on the basis of initial value (%) Initial stage Test Average value Energized ample Energized Change rate on the basis of initial value (%) Initial stage Test Average value Energized ample Change rate on the basis of initial value (%) Initial stage Test Average value External Magnetic Interference K-274P (Average value) K-274P (Average value) K-274P (Average value) Rate of variability (%) et voltage Reset voltage Rate of variability (%) +2 ample: K-274P 5 VDC umber of Relays: 1 pcs +1 Rate of variability (%) +2 ample: K-274P 5 VDC umber of Relays: 1 pcs ample: K-274P 5 VDC umber of Relays: 1 pcs 2 4, 2, ,4 4, 3,2 1,6 1,6 3,2 External magnetic field (A/m) et voltage Reset voltage 2 4, 2, ,4 4, 3,2 1,6 1,6 3,2 External magnetic field (A/m) et voltage Reset voltage 2 4, 2, ,4 4, 3,2 1,6 1,6 3,2 External magnetic field (A/m) 6

7 Time distribution of Operating and Release/et and Reset *1-274P K-274P umber of contacts ample: -274P 5 VDC umber of Relays: 5 pcs Must operate time Must release time umber of contacts 6 4 ample: K-274P 5 VDC umber of Relays: 5 pcs et time Reset time Time (ms) Time (ms) Bounce Time distribution of Operating and Release/et and Reset *1-274P K-274P umber of contacts 6 4 ample: -274P 5 VDC umber of Relays: 5 pcs Operating bounce time Release bounce time umber of contacts 8 6 ample: K-274P 5 VDC umber of Relays: 5 pcs et bounce time Reset bounce time Time (ms).5 1. Time (ms) High-frequency Characteristics Measurement Conditions HR 855A etwork analyzer -274P HR 851 Transmission reflection test-set 5Ω Terminator Terminals which were not being measured were terminated with 5 Ω. Measuring impedance: 5 Ω ote: The high-frequency characteristics data were measured using a dedicated circuit board and actual values will vary depending on the usage conditions. Check the characteristics of the actual equipment being used. High-frequency Characteristics (Isolation) *1, *2 Isolation (db) 2 4 HP 851A torage normalizer RF R A B ample: -274P umber of Relays: 1 pcs (Average value (initial)) High-frequency Characteristics (Insertion Loss) *1, *2 Insertion loss (db).5 (Average value (initial)) High-frequency Characteristics (Return Loss, V.WR) *1, *2 Return loss (db) 5 1 ample: -274P umber of Relays: 1 pcs (Average value (initial)) Return loss V.WR Frequency (MHz) ample: -274P umber of Relays: 1 pcs Frequency (MHz) V.WR , Frequency (MHz) *1. The tests were conducted at an ambient temperature of 23 C. *2. High-frequency characteristics depend on the PCB to which the Relay is mounted. Always check these characteristics, including durability, in the actual machine before use. 7

8 Dimensions ingle-side stable -274P 2.2 (2)* 1.1 (9.9)* * Average value.3 8 (7.8)* ote: Each value has a tolerance of ±.3 mm PCB Mounting Holes Tolerance: ± Eight, 1.-dia. holes ote: Orientation marks are indicated as follows: Terminal Arrangement/ Internal Connections ote: Check carefully the coil polarity of the Relay. ingle-winding latching U-274P PCB Mounting Holes Tolerance: ±.1 Terminal Arrangement/ Internal Connections 2.2 (2)* 1.1 (9.9)* Eight, 1.-dia. holes.3 8 (7.8)* R * Average value ote: Each value has a tolerance of ±.3 mm ote: Orientation marks are indicated as follows: ote: Check carefully the coil polarity of the Relay. Double-winding latching K-274P 2.2 (2)* 1.1 (9.9)*.3 8 (7.8)* 3.5 PCB Mounting Holes Tolerance: ± Ten, 1.-dia. holes * Average value ote: Orientation marks are indicated as follows: ote: Each value has a tolerance of ±.3 mm. Terminal Arrangement/ Internal Connections R ote: Check carefully the coil polarity of the Relay. Approved tandards A variety of UL/CA approved models are available. ote that the ratings are different from the domestic standard products. Make sure to clearly indicate "OO standard approved model" when ordering. UL Recognized: (File o. E41515) CA Certified: (File o. LR31928) Classification ingle-side stable Latching Low-sensitivity High-sensitivity Contact form DPDT (2c) Coil ratings Model Contact ratings 3 to VDC -274P-T-U K-274P-T-U U-274P-T-U (K)-274P-T4-U -274P-T15-U.6 A, 125 VAC at 4 C 2 A, 3 VAC at 4 C.6 A, 11 VAC at 4 C umber of test operations 6, 8

9 Precautions Please refer to PCB Relays Common Precautions for correct use. Correct Use Long-term Continuously O Contacts Using the Relay in a circuit where the Relay will be O continuously for long periods (without switching) can lead to unstable contacts because the heat generated by the coil itself will affect the insulation, causing a film to develop on the contact surfaces. We recommend using a latching relay (magnetic-holding relay) in this kind of circuit. If a single-side stable model must be used in this kind of circuit, we recommend using a fail-safe circuit design that provides protection against contact failure or coil burnout. Double-switching load in two poles Double-switching in two poles as shown in the figure below, one pole and two pole interval may become MBB (Make Before Break) mechanically according to the timing of the point of contact switching (By the short-circuit mode), and the malfunction might be caused. In such a circuit, direct electric switching should be avoided, and concern for contact to be carried after the contact of Relay absolutely switches in condition of no load. Relay Handling When washing the product after soldering the Relay to a PCB, + Contacts Load use a water-based solvent or alcohol-based solvent, and keep the solvent temperature to less than 4 C. Do not put the Relay in a cold cleaning bath immediately after soldering. Application examples provided in this document are for reference only. In actual applications, confirm equipment functions and safety before using the product. Consult your OMRO representative before using the product under conditions which are not described in the manual or applying the product to nuclear control systems, railroad systems, aviation systems, vehicles, combustion systems, medical equipment, amusement machines, safety equipment, and other systems or equipment that may have a serious influence on lives and property if used improperly. Make sure that the ratings and performance characteristics of the product provide a margin of safety for the system or equipment, and be sure to provide the system or equipment with double safety mechanisms. ote: Do not use this document to operate the Unit. OMRO Corporation Electronic and Mechanical Components Company Contact: Cat. o. K2-E (27)(O) 9

7. Approved Standards US: UL, CSA UL: FILE No.E CSA: FILE No.LR31928) 8. Special Function None : Standard U : For ultrasonically cleanable

7. Approved Standards US: UL, CSA UL: FILE No.E CSA: FILE No.LR31928) 8. Special Function None : Standard U : For ultrasonically cleanable Subminiature, Sensitive SPDT Signal Switching Relay High sensitivity: 98-mW (Rated power consumption: mw) pickup coil power. Impulse withstand of 1,V ( 1 μs) meets FCC requirements. Stick packing employed