PERMANENT MAGNET (Self Holding) SOLENOIDS 1. Design and Features 2. Stroke, Force and Holding Force The permanent magnet solenoids (also known as magnetic latching or self holding solenoids) is a product line of linear open frame solenoids that utilize the advantages of a high performance permanent magnet. The principle of operation is similar to all linear solenoids. When the coil is energized, the plunger moves toward the pole piece. The advantage of the PM solenoid is that once energized and plunger movement has occurred, the plunger will remain in the energized position without any further electrical power input. This “holding” feature is accomplished because the permanent magnet creates a magnetic latching field that maintains the plunger in the closed or energized position. There are two types of PM solenoid configurations : one is a single direction holding design and the other is a two direction holding design. The one direction design uses a PM to hold the solenoid in the energized position, Fig 1. The two direction design uses a PM that can hold the enclosed plunger in two different positions at both ends of the stroke. This is effected by the use of two separate coils and pole pieces, Fig 2. The PM type solenoids can be used in both short and long stroke applications. As such, the pole piece designs are both conical and flat depending upon the performance requirements. To improve efficiency, the solenoid stroke should be minimized in the application. Fig. 1 One Direction Fig. 2 Two Direction 86 3. Operational Considerations A) Temperature The coil data for the permanent magnet solenoid shows the values at ambient temperature 20°C and a duty cycle of 25% (SH2LC0524 is duty cycle 10%). The solenoid coil can operate at temperatures up to 105˚C. Most applications using PM solenoids are intermittent applications (as the permanent magnet is used for holding). Please note the maximum on time to prevent potential thermal damage. B) Operation The PM solenoid is different than traditional solenoids, in that electrical polarity is important to obtain proper operation. The lead wires from the coil are color coded and must be wired to the appropriate electrical connections (plus and minus terminals). With current flowing in one direction (when energizing the solenoid) the coils magnetic field and the permanent magnet field are additive. To release the solenoid from the “hold” position, the coil field has to cancel the permanent magnet field, thus current has to flow in the opposite direction to the pull in current flow. C) Return Spring In a one direction design it is advantageous to use a return spring to prevent inadvertent plunger “pull in” that could be caused by the magnetic field from the permanent magnet. D) Plunger and Shaft Modifications It is not recommended that the customer modify the plunger or shaft, as the shafts are manufactured and plated at the factory. Any special configurations can be supplied. Please consult the factory for details. E) Handling The permanent magnet solenoid utilizes a permanent magnet that will attract metal particles and care must be taken to prevent these particles from becoming “attached” to the solenoid. www.shindengen.co.jp/smt/ PERMANENT MAGNET (Self Holding) SOLENOIDS F) Installation of Solenoid The PM type solenoid uses tapped holes for mounting in the frame. Caution needs to be observed that the mounting screws used to attach these solenoids are the correct length so as not to damage the coil. 4. General Characteristics Insulation class Class A (105°C) Lead wire class A (105°C) Dielectric strength AC l000V 50/60 Hz 1 min. (at normal temperature and normal humidity) Insulation resistance More than 100 Mohm at DC 500V megger (at normal temperature and normal humidity) Expected life 200,000 cycles (Solenoid cycle life is very dependent upon side load, frequency of use, and environmental conditions. Cycle life tests should be performed by the customer.) Before selecting a permanent magnetic solenoid, the following information must be determined : A) Attraction Force and Holding Force The actual force required for both “pull in” and “holding” in the application should be increased using a safety factor multiplier of 1.5 to arrive at the force value that should be used in your specification. B) Duty Cycle Most applications using PM solenoids are intermittent applications (as the permanent magnet is used for holding), the duty cycle for each solenoid is shown in the catalog. Please note the maximum on time to prevent potential thermal damage. C) Stroke The stroke for a one direction PM solenoid is determined by application requirements. For a two direction PM solenoid the stroke is determined by the solenoid selected. D) Operating Voltage Operating DC voltage is determined by the application and voltage available. 6. Ordering Information #When ordering a permanent magnet solenoid, the correct part number needs to be determined, from the catalog information. #Example of a complete part number. SHILC0524-06 (One direction holding, conical face type and 6V coil) SH2LC0730-12 (Two direction holding, conical face type and 12V coil) 7. Labeling For permanent magnet solenoids the part number labeling is as follows: A) Standard Solenoid (no modifications). The solenoid label will have the part number and the date code (which identifies the year and week of manufacture). Example : SHILC0524-06 9401 Solenoid Size (Type No.) Date Code (year and week) B) Special Configuration (required for any modification to a standard design) Any change from the standard catalog design requires that a custom part number be assigned, which will also include the date code of manufacture. Example : M94015SH 9401 Special Part Number Date Code (year and week) www.shindengen.co.jp/smt/ 87 Permanent Magnet(Self Holding) Solenoids 5. How to Select a Solenoid After determining these specifications, one can find the correct size solenoid for the application, using the force-stroke characteristic tables and graphs. The coil data is also shown for different sizes of magnet wire. If the exact operating voltage is not in the coil data table, please consult the factory for details. Note: In a one direction PM solenoid, to “release” the PM field so that the plunger can return to the de-energized position the appropriate level of reverse current must be applied to the coil. The data for this “release” current is shown in the coil data given for each size solenoid. To determine the force output of the solenoid after temperature rise, please use the amp-turn force graphs (page 112) after calculating the amp-turns. SH1LC0524,SH1LF0524 PERMANENT MAGNET SOLENOID AT20°C 7 5 UNIT : mm SHOWN ENERGIZED AT20°C 6 5 HOLDING FORCE 1.90MIN. (MAGNET ONLY) HOLDING FORCE 2.06MIN. (MAGNET ONLY) 21W 0.5 FORCE [N] FORCE [N] 1 1 8.4W 25% 4.2W 0.1 2.1W 0.05 MAGNET ONLY 21W 0.5 8.4W 25% 4.2W 2.1W 0.1 0.05 WEIGHT : 14g PLUNGER: 3.3g 0.03 MAGNET ONLY 0.02 0 1 2 3 4 STROKE [mm] 5 6 0 1 STROKE-FORCE(C) 2 5 3 4 STROKE [mm] 6 STROKE-FORCE(F) DRIVE CIRCUITS （0.5） 24±0.5 6±0.3 OPERATE (WHITE) 12±0.5 2.5±0.2 φ2±0.1 RELEASE DCV 6±0.2 SOLENOID OPERATE t1 1.5±0.1 φ5±0.1 R 10±0.3 9±0.2 12.5 5±0.2 (BLACK) 6±0.2 ±0.5 RELEASE (UL1007 AWG28) (WHITE & BLACK) 2-M2 P0.4 LEADS 250MIN. COIL DATA without heat sink “on” time duty cycle= K100% “on” time + “off” time 25% or less MAX. “on” time in seconds 5 watts at 20˚C 8.4 ampere-turns at 20˚C release current (reference) 452 resistance Ω±10%(at 20˚C) no. turns SH1LC0524-06 SH1LF0524-06 4.3 340 6 360mA SH1LC0524-12 SH1LF0524-12 17.1 630 12 200mA SH1LC0524-24 SH1LF0524-24 68.6 1260 24 100mA type no. 88 www.shindengen.co.jp/smt/ volts DC ampere SH1LC0730,SH1LF0730 PERMANENT MAGNET SOLENOID AT20°C 20 UNIT : mm SHOWN ENERGIZED AT20°C 30 HOLDING FORCE 8.82MIN. (MAGNET ONLY) 10 HOLDING FORCE 4.9MIN. (MAGNET ONLY) 10 5 5 FORCE [N] FORCE [N] 24W 9.6W 25% 4.8W 1 2.4W 0.1 MAGNET ONLY WEIGHT : 38g PLUNGER: 9.2g 0.1 9.6W 25% 4.8W 0.5 2.4W 0.5 24W 1 MAGNET ONLY 0.04 0 1 2 3 4 STROKE [mm] 5 6 0 1 STROKE-FORCE(C) 5 3 4 STROKE [mm] 6 STROKE-FORCE(F) （0.6） 30±0.5 10±0.3 2 DRI E CIRC ITS ±0.2 3 O ERATE φ2.5 ±0.1 (WHITE) 17±0.5 RELEASE R SOLENOID 2±0.1 7±0.2 t1.2 φ7±0.1 15±0.3 DC O ERATE 12±0.2 19±0.5 ( LACK) RELEASE (UL1007 AWG26) (WHITE & BLACK) 2-M3 P0.5 LEADS 250MIN. COIL DATA without heat sink “on” time duty cycle= K100% “on” time + “off” time MAX. “on” time in seconds 10 watts at 20˚C 9.6 ampere-turns at 20˚C type no. SH1LC0730-06 SH1LF0730-06 25% or less release current (reference) 614 resistance Ω±10%(at 20˚C) no. turns 3.8 385 6 650mA volts DC ampere SH1LC0730-12 SH1LF0730-12 15 780 12 320mA SH1LC0730-24 SH1LF0730-24 60 1530 24 160mA www.shindengen.co.jp/smt/ 89 Permanent Magnet(Self Holding) Solenoids 8±0.2 6±0.2 SH1LC1140,SH1LF1140 PERMANENT MAGNET SOLENOID AT20°C 50 10 FORCE [N] FORCE [N] 44W 17.6W 25% 8.8W 4.4W 1 0.2 WEIGHT : 120g PLUNGER: 28g 1 2 5 3 4 STROKE [mm] 6 7 5 44W 1 17.6W 25％ 8.8W 4.4W MAGNET ONLY 0.5 MAGNET ONLY 0 AT20°C HOLDING FORCE 11.7MIN. (MAGNET ONLY) 50 10 0.5 0.1 8 0 1 STROKE-FORCE(C) 5 3 4 STROKE [mm] 6 7 8 DRI E CIRC ITS ±0.2 4 O ERATE φ3±0.1 (WHITE) RELEASE 26.5±0.5 DC R 3±0.1 9±0.2 ±0.5 14 ±0.2 8 ( LACK) RELEASE 8±0.2 24 ±0.2 SOLENOID O ERATE t2 φ11±0.1 23±0.3 2 STROKE-FORCE(F) （0.7） 40±0.5 10±0.3 SHOWN ENERGIZED 100 HOLDING FORCE 15.7MIN. (MAGNET ONLY) 5 UNIT : mm (UL1007 AWG26) (WHITE & BLACK) 2-φ2.6±0.1 2-M3 P0.5 LEADS 250MIN. COIL DATA without heat sink “on” time duty cycle= K100% “on” time + “off” time 25% or less MAX. “on” time in seconds 20 watts at 20˚C 17.6 ampere-turns at 20˚C release current (reference) 968 resistance Ω±10%(at 20˚C) no. turns SH1LC1140-06 SH1LF1140-06 2.1 340 6 1060mA SH1LC1140-12 SH1LF1140-12 8.2 640 12 560mA SH1LC1140-24 SH1LF1140-24 32.7 1360 24 260mA type no. 90 www.shindengen.co.jp/smt/ volts DC ampere SH1LC1240,SH1LF1240 PERMANENT MAGNET SOLENOID AT20°C SHOWN ENERGIZED AT20°C 100 HOLDING FORCE 26.5MIN. (MAGNET ONLY) HOLDING FORCE 19.6MIN. (MAGNET ONLY) 50 10 44W 46W 5 18.4W 25% FORCE [N] FORCE [N] 70 50 UNIT : mm 9.2W 10 44W 46W 5 18.4W 25% 9.2W 4.6W 4.4W 4.4W 4.6W 1 1 MAGNET ONLY 0.5 0 1 WEIGHT : 145g PLUNGER: 34g 2 3 4 5 STROKE [mm] 6 7 MAGNET ONLY 0.5 8 18.4W 0 1 STROKE-FORCE(C) 10±0.3 40±0.5 2 3 4 5 STROKE [mm] 6 7 8 STROKE-FORCE(F) DRIVE CIRCUITS （0.7） OPERATE ±0.2 4 φ3±0.1 (WHITE) 29.5±0.5 RELEASE DCV SOLENOID 3±0.1 φ12±0.1 R OPERATE 25±0.5 13±0.2 (BLACK) 8±0.2 RELEASE (UL1007 AWG24) (WHITE & BLACK) 4-M3 P0.5 LEADS 250MIN. COIL DATA without heat sink “on” time duty cycle= K100% “on” time + “off” time 25% or less MAX. “on” time in seconds 20 watts at 20˚C 18.4 ampere-turns at 20˚C release current (reference) 979 resistance Ω±10%(at 20˚C) no. turns SH1LC1240-06 SH1LF1240-06 2.0 320 6 1620mA SH1LC1240-12 SH1LF1240-12 7.8 630 12 820mA SH1LC1240-24 SH1LF1240-24 31.3 1315 24 400mA type no. www.shindengen.co.jp/smt/ volts DC ampere 91 Permanent Magnet(Self Holding) Solenoids 15±0.2 25±0.5 t2 9±0.2 SH2LC0524 PERMANENT MAGNET SOLENOID UNIT : mm AT20°C 5 HOLDING FORCE 1.5ＮMIN. (MAGNET ONLY) FORCE [N] 3 1 0.8 0.6 13W 10％ 0.4 WEIGHT : 15g PLUNGER: 3g 10％ 0.3 0 0.4 0.8 1.2 1.6 STROKE [mm] 2 STROKE-FORCE (C) 7±0.3 DRI E CIRC ITS φ2±0.03 STROKE (WHITE) (RED) （0.5） t1 10±0.3 24±0.5 2±0.2 φ2±0.03 12±0.5 5±0.3 9±0.2 DC 6±0.2 2-M2 P0.4 LL COIL SH COIL PULL COIL (UL1007 AWG28) (RED & BLACK) ( LACK) 5±0.2 LEADS 250MIN. ( LACK) PUSH COIL (UL1007 AWG28) (WHITE & BLACK) SHOWN ENERGIZED POSITION WHEN A VOLTAGE IS APPLIED TO PUSH COIL STROKE: 2mm±0.2 COIL DATA without heat sink “on” time duty cycle= K100% “on” time + “off” time MAX. “on” time in seconds 1 watts at 20˚C 13 ampere-turns at 20˚C 364 resistance Ω±10%(at 20˚C) no. turns SH2LC0524-06 2.8 166 6 SH2LC0524-12 11.1 345 12 SH2LC0524-24 44.3 670 24 type no. 92 10% or less www.shindengen.co.jp/smt/ volts DC SH2LC0730 PERMANENT MAGNET SOLENOID UNIT : mm AT20°C 10 HOLDING FORCE 2.5MIN. (MAGNET ONLY) FORCE [N] 5 20W 8W 25％ 1 0.5 WEIGHT : 35g PLUNGER: 7g 0 1 2 STROKE [mm] 3 4 STROKE-FORCE (C) 12±0.3 ±0.5 30 9±0.3 DRI E CIRC ITS φ2.5±0.03 3±0.3 STROKE 17±0.5 (WHITE) 15±0.3 t1.2 φ2.5±0.03 (RED) （0.5） 14±0.2 DC 8±0.2 LL COIL SH COIL 2-M3 P0.5 LEADS 250MIN. (RED & BLACK) PUSH COIL (UL1007 AWG26) (WHITE & BLACK) SHOWN ENERGIZED POSITION WHEN A VOLTAGE IS APPLIED TO PUSH COIL STROKE: 3mm±0.3 COIL DATA without heat sink “on” time duty cycle= K100% “on” time + “off” time MAX. “on” time in seconds 2 watts at 20˚C 8 ampere-turns at 20˚C type no. SH2LC0730-06 10% or less 368 resistance Ω±10%(at 20˚C) no. turns 4.5 285 6 volts DC SH2LC0730-12 18 540 12 SH2LC0730-24 72 1100 24 www.shindengen.co.jp/smt/ 93 Permanent Magnet(Self Holding) Solenoids PULL COIL (UL1007 AWG26) ( LACK) 8±0.2 ( LACK) SH2LC1140 PERMANENT MAGNET SOLENOID UNIT : mm AT20°C 20 HOLDING FORCE 3.5ＮMIN. (MAGNET ONLY) 10 FORCE [N] 40W 5 16W 25％ 8W 1 WEIGHT : 115g PLUNGER: 21g 0.5 4W 0 1 2 3 STROKE [mm] 5 4 STROKE-FORCE(C) 11±0.3 40±0.5 15±0.3 DRIVE CIRCUITS φ3.5±0.03 4±0.3 STROKE 23±0.3 (RED) （0.5） t2 φ3.5±0.03 26.5±0.5 (WHITE) ±0.2 PULL COIL (UL1007 AWG26) (RED & BLACK) DCV 10±0.2 12±0.2 LEADS 250MIN. 4-M3 P0.5 20 PULL COIL PUSH COIL (BLACK) (BLACK) PUSH COIL (UL1007 AWG26) (WHITE & BLACK) SHOWN ENERGIZED POSITION WHEN A VOLTAGE IS APPLIED TO PUSH COIL STROKE: 4mm±0.3 COIL DATA without heat sink “on” time duty cycle= K100% “on” time + “off” time MAX. “on” time in seconds 3 watts at 20˚C 16 ampere-turns at 20˚C 691 resistance Ω±10%(at 20˚C) no. turns SH2LC1140-06 2.3 265 6 SH2LC1140-12 9 525 12 SH2LC1140-24 36 1025 24 type no. 94 10% or less www.shindengen.co.jp/smt/ volts DC CHARACTERISTICS TABLE FOR PERMANENT MAGNET SOLENOIDS AT20°C 100 50 50 10 10 SH1LC1240 SH1LC1140 SH1LF1240 SH1LF1140 SH1LC1240 SH1LC1140 SH1LF1240 SH1LF1140 5 SH2LC1140 FORCE [N] FORCE [N] 5 AT20°C 100 SH1LC1140 1 1 SH1LC0730 SH1LC0730 0.5 SH1LF0730 0.5 SH1LF0730 SH1LC0524 SH1LF0524 SH1LC0524 SH1LF0524 0.1 0.07 0 1 2 3 4 5 STROKE [mm] 6 0.1 0.07 7 0 1 2 DUTY CYCLE 100% 3 4 5 STROKE [mm] 7 DUTY CYCLE 50% AT20°C 100 50 50 SH1LC1240 SH1LC1140 SH1LF1240 SH1LF1140 SH1LC1240 SH1LC1140 SH1LF1240 SH1LF1140 10 10 SH2LC1140 SH2LC1140 SH2LC0730 FORCE [N] 5 FORCE [N] 5 SH1LC0730 1 SH1LC0730 SH2LC0730 SH1LF0730 1 SH1LC0524 SH1LF0524 SH1LF0730 0.5 0.5 SH1LC0524 SH1LF0524 0.1 SH2LC0524 0.1 0 1 2 3 4 5 STROKE [mm] 6 7 0.07 0 DUTY CYCLE 25% 1 2 3 4 5 STROKE [mm] 6 7 DUTY CYCLE 10% www.shindengen.co.jp/smt/ 95 Permanent Magnet(Self Holding) Solenoids AT20°C 100 0.07 6 PERMANENT MAGNET SOLENOIDS AMPERE-TURN V.S. FORCE SH1LC 0524 SH1LF 0524 S 0.5 7 5 S 0.5 S 1 S 2 S 3 S S S S S S S 4 S 5 FORCE [N] FORCE [N] 1 0.5 SH2LC 0524 1 2 1 1.5 2 3 4 5 S 2 1 FORCE [N] 5 PERFORMANCE CURVES ARE AT 20˚C 0.5 0.5 0.1 0.1 0.1 0.05 200 300 400 500 600 700 0.07 800 200 300 AM ERE-T RNS 400 500 600 700 800 0.03 200 SH1LC0730 500 600 700 800 AM ERE-T RNS SH1LF0730 SH2LC 0730 20 10 1 5 S 1 10 S 3 S 2 5 FORCE [N] 5 S 0.5 20 0.5 1 2 3 4 5 FORCE [N] S S S S S S 10 FORCE [N] 400 AM ERE-T RNS S 3 S 4 S 5 1 1 0.5 0.5 0.5 400 600 800 1000 0.3 200 1200 400 AM ERE-T RNS 0.5 1 2 3 4 5 6 7 5 70 50 0.3 200 1200 400 500 600 700 AM ERE-T RNS SH2LC1140 10 S 0.5 S 1 S 4 S 2 FORCE [N] FORCE [N] 1000 SH1LF1140 S S S S S S S S 10 800 AM ERE-T RNS SH1LC1140 70 50 600 S S S S S 10 5 5 3 4 5 6 7 FORCE [N] 0.2 200 1 1 0.7 1 400 600 800 1000 1200 1400 1600 1800 400 600 AM ERE-T RNS SH1LC1240 SH1LF1240 100 FORCE [N] 10 S 0.5 S 1 50 S 2 S 3 FORCE [N] S 0.5 S 1 S 2 S 3 S 4 S 5 S 6 S 7 50 S S S S 10 4 5 6 7 5 5 1 400 600 800 1000 1200 1400 1600 1800 AM ERE-T RNS 96 400 600 0.5 400 600 800 1000 AM ERE-T RNS AM ERE-T RNS 100 1 800 1000 1200 1400 1600 1800 800 1000 1200 1400 1600 1800 AM ERE-T RNS www.shindengen.co.jp/smt/ 1200 800