SF4D-DC12V

## Safety Relays SF RELAYS Double contact type 

Product Catalog 

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2024.1 

## Safety Relays 

## SF[ RELAYS Double contact type] 

## Flat type (double contact) Safety relay compliant with Safety standards 

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[ Protective construction ] Sealed type ee FEATURES<br>● High contact reliability is achieved by double<br>contact.<br>●Forced operation method<br>25<br>53.3 53.3 33 ●Separate chamber method<br>16.5<br>16.5<br>● Independent operation method<br><<“ wo — ;:<br>( 4 Form A 4 Form B )<br>TYPICAL APPLICATIONS<br>4 poles 8 poles<br>●Industrial equipment<br>●Elevator etc.<br>( Unit: mm )<br>**----- End of picture text -----**<br>


## ~~ee~~ ORDERING INFORMATION ( PART NO. : Ordering part number for Japanese market) 

AG 1 0 Operating function Contact arrangement Rated coil voltage (DC) 0: Single side stable 5: 2 Form A 2 Form B 1: 12 V, 2: 24 V, 3: 48 V, 8: 60 V, 9: 5 V 7: 4 Form A 4 Form B 

## ~~a~~ ORDERING INFORMATION ( TYPE NO. : Ordering part number for non Japanese market) 

SF D Rated coil voltage DC 5, 12, 24, 48, 60 V Contact arrangement 2: 2 Form A 2 Form B 

4: 4 Form A 4 Form B 

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ASCTB120E   202401 

ー 1 ー 

Panasonic Industry Co., Ltd. 2024 

Safety Relays SF RELAYS Double contact type 

## TYPES 

" Type No. " is ordering part number for non Japanese market. " Part No. " is ordering part number for Japanese market. 

## ■PC board terminal 

- ●Carton packing 

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Standard packing<br>Contact arrangement Rated coil voltage Type No. Part No. Outer<br>Inner carton<br>carton<br>  5 V DC SF2D-DC5V AG1059<br>12 V DC SF2D-DC12V AG1051<br>2 Form A<br>4 poles 2 Form B 24 V DC SF2D-DC24V AG1052<br>48 V DC SF2D-DC48V AG1053<br>60 V DC SF2D-DC60V AG1058<br>20 pcs. 200 pcs.<br>  5 V DC SF4D-DC5V AG1079<br>12 V DC SF4D-DC12V AG1071<br>4 Form A<br>８ poles 4 Form B 24 V DC SF4D-DC24V AG1072<br>48 V DC SF4D-DC48V AG1073<br>60 V DC SF4D-DC60V AG1078<br>**----- End of picture text -----**<br>


## RATING 

## ■Coil data 

- Operating characteristics such as "Operate voltage" and "Release voltage" are influenced by mounting conditions or ambient temperature, etc. 

Therefore, please use the relay within ±5% of rated coil voltage. 

- "Initial" means the condition of products at the time of delivery. 

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Contact  Rated coil  Operate  Release  Rated operating  Coil resistance Rated  Max. allowable<br>voltage* voltage* current operating  voltage<br>arrangement voltage ( at 20℃ ) ( at 20℃ ) ( ±10%, at 20℃ ) ( ±10%, at 20℃ ) power ( at 60℃ )<br>  5 V DC 100 mA 50 Ω<br>12 V DC Max. 75% V  Min. 10% V  41.7 mA 288 Ω<br>2 Form A of rated coil  of rated coil<br>4 poles 2 Form B 24 V DC voltage  voltage  20.8 mA 1,152 Ω 500 mW<br>48 V DC ( Initial ) ( Initial ) 10.4 mA 4,608 Ω<br>60 V DC 8.3 mA 7,200 Ω 120% V ofrated coil<br>  5 V DC 100 mA 50 Ω voltage<br>12 V DC Max. 75% V  Min. 15% V  41.7 mA 288 Ω<br>4 Form A of rated coil  of rated coil<br>８ poles 4 Form B 24 V DC voltage  voltage  20.8 mA 1,152 Ω 500 mW<br>48 V DC ( Initial ) ( Initial ) 10.4 mA 4,608 Ω<br>60 V DC 8.3 mA 7,200 Ω<br>**----- End of picture text -----**<br>


- square, pulse drive ( JIS C 5442 ) 

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> Panasonic Industry Co., Ltd. 2024 ASCTB120E   202401 

ー 2 ー 

Safety Relays SF RELAYS Double contact type 

## ■Specifications 

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Item Specifications<br>Contact arrangement 2 Form A 2 Form B 4 Form A 4 Form B<br>Contact resistance<br>( initial ) Max. 30 mΩ ( by voltage drop 6 V DC 1 A )<br>Contact material Au-flashed AgSnO2 type<br>Contact rating<br>6 A 250 V AC, 6 A 30 V DC<br>( resistive )<br>Contact data Max. switching  1,500 VA, 180 W<br>power ( resistive )<br>Max. switching<br>440 V AC, 30 V DC<br>voltage<br>Max. switching  6 A<br>current<br>Min. switching load 100 mA 5 V DC<br>( reference value ) * [1]<br>Insulation resistance ( initial ) Min. 1,000 MΩ ( at 500 V DC, Measured portion is the same as the case of dielectric strength. )<br>Between open<br>contacts 1,300 Vrms for 1 min ( detection current: 10 mA )<br>Dielectric<br>Between contact sets 2,500 Vrms for 1 min ( detection current: 10 mA )<br>strength ( initial )<br>Between contact and<br>coil 2,500 Vrms for 1 min ( detection current: 10 mA )<br>Time  Operate time Max. 30 ms at rated coil voltage ( at 20℃, without bounce )<br>characteristics<br>( initial ) Release time Max. 15 ms at rated coil voltage ( at 20℃, without bounce, without diode )<br>Functional 294 m/s [2]  ( half-sine shock pulse: 11 ms, detection time: 10 µs )<br>Shock resistance<br>Destructive 980 m/s [2]  ( half-sine shock pulse: 6 ms )<br>Vibration  Functional 10 to 55 Hz at double amplitude of 2 mm ( detection time: 10 µs )<br>resistance Destructive 10 to 55 Hz at double amplitude of 2 mm<br>Expected life Mechanical life Min. 10 x 10 [6]  ( switching frequency 180 times/min )<br>Conditions for usage,<br>Conditions transport and  Ambient temperature: -40 to +70℃, Humidity: 5 to 85% RH ( Avoid icing and condensation )<br>storage* [2]<br>Unit weight Approx. 38 g Approx. 47 g<br>**----- End of picture text -----**<br>


*1.  This value is a rough indication of the lower limit at which switching is possible at micro load level. 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. For ambient temperature, please refer to the "GUIDELINES FOR RELAY USAGE". 

## ■Electrical life 

Conditions: Resistive load, switching frequency 20 times/min 

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Type Switching capacity Number of operations<br>2 Form A 2 Form B, 4 Form A 4 Form B 6 A 250 V AC Min. 100 x 10 [3]<br>REFERENCE DATA<br>1. Operate and release times   2.Coil temperature rise value 3.Ambient temperature characteristics<br>( without diode )<br>Tested sample: SF2D-DC24V (2 Form A 2 Form B) Tested sample: SF4D-DC24V (4 Form A 4 Form B) Tested sample: SF4D-DC24V (4 Form A 4 Form B)<br>Quantity: n = 20 Quantity: n = 6 Quantity: n = 6<br>Coil applied voltage: 100%V, 120%V<br>Contact carry current: 6 A<br>50 30 100<br>25<br>40 Inside the coil<br>50<br>20 Release voltage<br>30<br>Operate time 15 -40 -20 0 Operate voltage<br>2040 60 80<br>20 Ambient<br>Max. 10 Contact temperature, ℃<br>x -50<br>Min.<br>10 Release time Max. 5<br>x<br>Min.<br>0 0 -100<br>70 80 90 100 110 120 130 100 110 120<br>Coil applied voltage, %V Coil applied voltage, %V<br>Rate of change, %<br>Temperature rise, ℃<br>Operate/release time, ms<br>**----- End of picture text -----**<br>


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ASCTB120E   202401 

ー 3 ー 

Panasonic Industry Co., Ltd. 2024 

Safety Relays SF RELAYS Double contact type 

## ~~a~~ DIMENSIONS «= **CAD** The CAD data of the products with a "CAD" mark can be downloaded from our Website. 

Unit: mm 

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■4 poles ( 2 Form A 2 Form B )<br>re) CAD External dimensions Recommended PC board pattern<br>( BOTTOM VIEW )<br>2.54  10-1.4 dia. holes<br>. i LL _<br>| SUSEEEEEEEEETTETSTs<br>L fy LTT TTT Ty yyy errr nt<br>rv v'T LC mV SLO LEHOHO<br>oF 5.08 12.7 12.7 12.7 tT te<br>l L [YTTTT TTT ET TT ty tt ey tl<br>1.0 1.0<br>| Re EEEEEE<br>53.3±0.5<br>5 6 7 8 Tolerance: ±0.1<br>| 3 —— |__ |<br>1<br>Schematic<br>2<br>9 oO 10 a ch 11 o 12 oO ( BOTTOM VIEW )<br>General tolerance: ±0.3 5 6 7 8<br>1<br>er<br>2 eS<br>9 10 11 12<br>16±0.5<br>2.54<br>0.5<br>.0±0.5<br>3<br>0.48<br>0.30<br>25.0  7.62 12.7<br>**----- End of picture text -----**<br>


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■8 poles ( 4 Form A 4 Form B )<br>re) CAD External dimensions Recommended PC board pattern<br>( BOTTOM VIEW )<br>2.54  18-1.4 dia. holes<br>“~s - 5.08  TWi 12.7 12.7 12.7 | e CPCEEEte<br>1.0 1.0<br>COP Te ee er<br>53.3±0.5<br>13 14 15 16 Tolerance: ±0.1<br>5 6 7 8<br>[ 1 c of Schematic<br>2 ( BOTTOM VIEW )<br>9 10 11 12 13 14 15 16<br>17 18 19 20<br>General tolerance: ±0.3 1<br>5 6 7 8<br>9 10 11 12<br>a L a e? 5}<br>2 ° =<br>4 5 Fp<br>17 18 19 20<br>po SAFETY STANDARDS Each standard may be updated at any time, so please check our Website for the latest information.<br>■UL/C-UL ( Approved ) ■TÜV ( Approved )<br>File No. Contact rating File No. Contact rating<br>6 A 250 V AC 968/EZ 116.03/10 6 A 250 V AC<br>E120782<br>6 A 24 V DC<br>16±0.5<br>.54<br>0.5  2<br>3.0±0.5<br>0.48<br>0.30 7.62<br>33±0.5  7.62  12.7<br>7.62 0.48<br>**----- End of picture text -----**<br>


- ■CSA ( Approved ) 

CSA standard approved by C-UL 

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ASCTB120E   202401 

ー 4 ー 

Panasonic Industry Co., Ltd. 2024 

Safety Relays SF RELAYS Double contact type 

## SAFETY STRUCTURE 

This SF relay design ensures that subsequent operations shut down and can automatically return to a safe state when the SF relay suffers overloading and other circuit abnormalities ( unforeseen externally caused circuit or device breakdowns, end of life incidents, and noise, surge, and environmental 

influences ) owing to contact welding, spring fusion or, in the worst-case scenario, relay breakdown ( coil rupture, faulty operation, faulty return, and fatigue and breakage of the operating spring and return spring ), and even in the event of end of life. 

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Structure Operation<br>Min. 0.5 mm<br>Even when one contact is welded closed, the other<br>maintains a gap of Min. 0.5 mm.<br>N.O.<br>(contact A)<br>Forced operation method  Car d<br>1 ( 2 Form A 2 Form B, N.C. ( Example )  In the diagram on the left, the form<br>4 Form A 4 Form B )  (contact B) B contact have welded but the form<br>Weld A contact maintain at a gap of 0.5<br>mm. Subsequent contact movement<br>is suspended and the weld can be<br>The two form A and B contacts are coupled with  detected.<br>the same card. The operation of each contact is<br>regulated by the movement of the other contact.<br>External N.O.<br>Return<br>Contact weld<br>Enables design of safety circuits that allow weld<br>detection and return at an initial stage.<br>Independent operation  Return<br>Return<br>2 method<br>( Example )  As shown at the top right of the<br>( 4 Form A 4 Form B )<br>diagram on the left, if the external<br>N.O. contact welds, a 0.5 mm gap is<br>maintained. Each of the other three<br>None of four contacts are held in position by the  contacts returns to N.O. because the<br>armature. Even though one of the external contacts  coil is no longer energized.<br>has welded, the other three contacts have returned<br>owing to the de-energizing of the coil.<br>Case separator 1 Card Prevents shorting between contacts and welding<br>N.O.  of springs and spring failure owing to short circuit<br>(contact A) current.<br>Body<br>2 separator<br>Separate chamber method  N.C.<br>3 ( 2 Form A 2 Form B,  (contact B)<br>4 Form A 4 Form B )<br>( Example )  As shown on the diagram on the left,<br>even if the operating springs numbered<br>In independent chambers, the form A and B  1 and 2 there is no shorting between<br>contacts are kept apart by a body/separator of card  contacts.<br>and by the card itself.<br>Independent COM enables differing pole circuit<br>Contact arrangement with independent COM<br>4 2 Form A 2 Form B contact, 4 Form A 4 Form B contact contact ( 2 Form A 2 Form B ),  configurations. This makes it possible to design various kinds of<br>( 4 Form A 4 Form B )<br>control circuits and safety circuits.<br>～ ～<br>～ ～<br>**----- End of picture text -----**<br>


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> Panasonic Industry Co., Ltd. 2024 ASCTB120E   202401 

ー 5 ー 

Safety Relays SF RELAYS Double contact type 

## OPERATION (WHEN CONTACTS ARE WELDED) 

SF relays work to maintain a normal operating state even when the contact welding occur by overloading or short circuit currents. 

It is easy to make weld detection and safety circuit in the design to ensure safety even if contacts weld. 

- ■4 poles ( 2 Form A 2 Form B ) 

- ●Form B contact welding 

When the form B contact ( No. 1 or No. 3 ) weld, the armature becomes non-operational, the contact gaps at the two form A contacts are maintained at Min. 0.5 mm. Reliable cut-off state is thus ensured. 

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( Example )  Case of No. 1 contact<br>welding<br>Each of the two form A<br>No. 4 No. 1 No. 4 No. 1<br>contacts ( No. 2 and No.<br>4 ) maintain a gap of Min.<br>No. 3 No. 2 No. 3 No. 2 0.5 mm.<br>Non-energized Energized<br>(when No. 1 contact is welded)<br>**----- End of picture text -----**<br>


- ●Form A contact welding 

When the form A contact ( No. 2 or No. 4 ) weld, the armature remains in a non-returned state and the contact gap at the two form B contacts are maintained at Min. 0.5 mm. Reliable cut-off state is thus ensured. 

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( Example )  Case of No. 2 contact<br>welding<br>The two form B contacts<br>No. 4 No. 1 No. 4 No. 1<br>( No. 1 and No. 3 )<br>maintains a gap of<br>No. 3 No. 2 No. 3 No. 2 Min. 0.5 mm.<br>Energized Non-energized<br>(when No. 2 contact is welded)<br>**----- End of picture text -----**<br>


- ●Contact operation table 

The table below shows the state of the other contacts when the current through the welded form A contact is 0 V and the rated voltage is applied through the welded form B contact. 

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No. 4 No. 1<br>No. 3 No. 2<br>Contact No. No. 1 No. 2 No. 3 No. 4<br>Terminal No. 11-12 7-8 5-6 9-10<br>**----- End of picture text -----**<br>


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State of other contacts<br>1 2 3 4<br>1 － > 0.5 > 0.5<br>Welded  2 > 0.5 － > 0.5<br>terminal No. 3 > 0.5 － > 0.5<br>4 > 0.5 > 0.5 －<br>> 0.5: Contact gap Min. 0.5 mm<br>Empty cells: either closed or open<br>**----- End of picture text -----**<br>


Note)  Contact gaps are shown at the initial state. If the contacts change state owing to load switching it is necessary to check the actual loading. 

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> Panasonic Industry Co., Ltd. 2024 ASCTB120E   202401 

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Safety Relays SF RELAYS Double contact type 

- ■8 poles ( 4 Form A 4 Form B ) 

- ●Internal contacts welding 

When internal contacts ( No. 2, No. 3, No. 6 or No. 7 ) are welded, the armature becomes non-operational and the four open contact gaps are maintained at Min. 0.5 mm. Reliable cut-off state is thus ensured. 

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( Example )  Case of No. 1 contact<br>welding Each of the four<br>No. 8 No. 1 No. 8 No. 1<br>form A contacts ( No. 1,<br>No. 7 No. 2 No. 7 No. 2<br>No. 3, No. 5 and No. 7 )<br>maintains a gap of<br>No. 6 No. 3 No. 6 No. 3 Min. 0.5 mm.<br>No. 5 No. 4 No. 5 No. 4<br>Energized Non-energized<br>(when no. 1 contact is welded)<br>**----- End of picture text -----**<br>


- ●External contacts welding 

When external contacts ( No. 1, No. 4, No. 5 or No. 8 ) are welded, gap between welded contact and adjacent contact is maintained at Min. 0.5 mm and other contacts operate normally by the coil being non-energized. 

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( Example 1 )  Case of No. 1 contact<br>welding<br>No. 8 No. 1 No. 8 No. 1<br>Adjacent contact No. 2<br>No. 7 No. 2 No. 7 No. 2<br>maintains a contact gap<br>of Min. 0.5 mm. Other<br>No. 6 No. 3 No. 6 No. 3 contacts go back to the<br>No. 5 No. 4 No. 5 No. 4 normal return position by<br>coil non-energized, form A<br>Energized Non-energized<br>contacts (No. 3, No. 5 and<br>(when no. 1 contact is welded)<br>No. 7) maintain a contact<br>( Example 2 )  Case of external connections  Weld gap of Min. 0.5 mm, and<br>are made in series  form B contacts ( No. 4,<br>Energized<br>Even if one of the contacts  Contact gap No. 6 and No. 8 ) return<br>Min. 0.5 mm<br>welds, the other contacts  Non-energized to a conductive state.<br>operate independently<br>and the contact gaps are<br>maintained at Min. 0.5 mm.<br>**----- End of picture text -----**<br>


- ●Contact operation table 

The table below shows the state of the other contacts when the current through the welded form A contact is 0 V and the rated voltage is applied through the welded form B contact. 

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No. 8 No. 1<br>No. 7 No. 2<br>No. 6 No. 3<br>No. 5 No. 4<br>Contact No. No.1 No. 2 No. 3 No. 4 No. 5 No. 6 No. 7 No. 8<br>Terminal No. 20‒19 12‒11 8‒7 16‒15 13‒14 5‒6 9‒10 17‒18<br>**----- End of picture text -----**<br>


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State of other contacts<br>1 2 3 4 5 6 7 8<br>1 － > 0.5 > 0.5 ≠ > 0.5 ≠ > 0.5 ≠<br>2 > 0.5 － > 0.5 > 0.5 > 0.5<br>3 > 0.5 － > 0.5 > 0.5 > 0.5<br>Welded  4 ≠ > 0.5 > 0.5 － ≠ > 0.5 ≠ > 0.5<br>terminal  5 > 0.5 ≠ > 0.5 ≠ － > 0.5 > 0.5 ≠<br>No.<br>6 > 0.5 > 0.5 > 0.5 － > 0.5<br>7 > 0.5 > 0.5 > 0.5 － > 0.5<br>8 ≠ > 0.5 ≠ > 0.5 ≠ > 0.5 > 0.5 －<br>**----- End of picture text -----**<br>


> 0.5: Contact gap Min. 0.5 mm 

- ≠: contact closed 

- Empty cells: either closed or open 

- Note)  Contact gaps are shown at the initial state. If the contacts change state owing to load switching it is necessary to check the actual loading. 

## GUIDELINES FOR USAGE 

- For cautions for use, please read "GUIDELINES FOR RELAY USAGE". https://industrial.panasonic.com/ac/e/control/relay/cautions_use/index.jsp 

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> Panasonic Industry Co., Ltd. 2024 ASCTB120E   202401 

ー 7 ー 

GUIDELINES FOR POWER, HIGH-CAPACITY DC CUT OFF AND SAFETY RELAYS USAGE 

## ■For cautions for use, please read " GUIDELINES FOR RELAY USAGE ". https://industrial.panasonic.com/ac/e/control/relay/cautions_use/index.jsp 

## Precautions for Coil Input 

## ■Long term current carrying 

A circuit that will be carrying a current continuously for long periods without relay switching operation. ( circuits for emergency lamps, alarm devices and error inspection that, for example, revert only during malfunction and output warnings with form B contacts ) Continuous, longterm current to the coil will facilitate deterioration of coil insulation and characteristics due to heating of the coil itself. For circuits such as these, please use a magnetic-hold type latching relay. If you need to use a single stable relay, use a sealed type relay that is not easily affected by ambient conditions and make a failsafe circuit design that considers the possibility of contact failure or disconnection. 

## ■DC Coil operating power 

Steady state DC current should be applied to the coil. The wave form should be rectangular. If it includes ripple, the ripple factor should be less than 5 %. 

However, please check with the actual circuit since the electrical characteristics may vary. The rated coil voltage should be applied to the coil and the set/reset pulse time of latching type relay differs for each relays, please refer to the relay's individual specifications. 

## ■Coil connection 

When connecting coils of polarized relays, please check coil polarity ( ＋, － ) at the internal connection diagram ( Schematic ). If any wrong connection is made, it may cause  unexpected malfunction, like abnormal heat, fire and so on, and circuit do not work. Avoid impressing voltages to the set coil and reset coil at the same time. 

## ■Maximum allowable voltage and temperature rise 

Proper usage requires that the rated coil voltage be impressed on the coil. Note, however, that if a voltage greater than or equal to the maximum continuous voltage is impressed on the coil, the coil may burn or its layers short due to the temperature rise. Furthermore, do not exceed the usable ambient temperature range listed in the catalog. 

- ●Operate voltage change due to coil temperature rise In DC relays, after continuous passage of current in the coil, if the current is turned OFF, then immediately turned ON again, due to the temperature rise in the coil, the operate voltage will become somewhat higher. Also, it will be the same as using it in a higher temperature atmosphere. The resistance/temperature relationship for copper wire is about 0.4 % for 1 ℃, and with this ratio the coil resistance increases. That is, in order to operate of the relay, it is necessary that the voltage be higher than the operate voltage and the operate voltage rises in accordance with the increase in the resistance value. However, for some polarized relays, this rate of change is considerably smaller. 

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ASCTB412E   202301 

Panasonic Industry Co., Ltd. 2023 

GUIDELINES FOR POWER, HIGH-CAPACITY DC CUT OFF AND SAFETY RELAYS USAGE 

## Ambient Environment 

■Usage, Transport, and Storage Conditions During usage, storage, or transportation, avoid locations subjected to direct sunlight and maintain normal temperature, humidity and pressure conditions. 

- ●Temperature/Humidity/Pressure 

When transporting or storing relays while they are tube packaged, there are cases the temperature may differ from the allowable range. In this case be sure to check the individual specifications. 

Also allowable humidity level is influenced by temperature, please check charts shown below and use relays within mentioned conditions. ( Allowable temperature values differ for each relays, please refer to the relay's individual specifications. ) 

- 1)  Temperature: 

   - The tolerance temperature range differs for each relays, please refer to the relay's individual specifications 

- 2)  Humidity: 5 to 85 % RH 

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Humidity (％ RH)<br>85<br>Allowa b le range<br>Avoid icing Avoid con-<br>when used at densation when<br>temperatures used at tem-<br>lower than 0°C peratures higher<br>than 0°C<br>5<br>-40 0 85<br>Ambient temperature (℃)<br>**----- End of picture text -----**<br>


- 3)  Pressure: 86 to 106 kPa 

- ●Dew condensation 

Condensation occurs when the ambient temperature drops suddenly from a high temperature and humidity, or the relay is suddenly transferred from a low ambient temperature to a high temperature and humidity. Condensation causes the failures like insulation deterioration, wire disconnection and rust etc. Panasonic Industry Co., Ltd. does not guarantee the failures caused by condensation. 

The heat conduction by the equipment may accelerate the cooling of device itself, and the condensation may occur. 

Please conduct product evaluations in the worst condition of the actual usage. ( Special attention should be paid when high temperature heating parts are close to the device. Also please consider the condensation may occur inside of the device. ) 

## ●Icing 

Condensation or other moisture may freeze on relays when the temperature become lower than 0 ℃.This icing causes the sticking of movable portion, the operation delay and the contact conduction failure etc. Panasonic Industry Co., Ltd. does not guarantee the failures caused by the icing. 

The heat conduction by the equipment may accelerate the cooling of relay itself and the icing may occur. Please conduct product evaluations in the worst condition of the actual usage. 

- ●Low temperature and low humidity 

The plastic becomes brittle if the relay is exposed to a low temperature, low humidity environment for long periods of time. 

- ●High temperature and high humidity 

Storage for extended periods of time ( including transportation periods ) at high temperature or high humidity levels or in atmospheres with organic gases or sulfide gases may cause a sulfide film or oxide film to form on the surfaces of the contacts and/or it may interfere with the functions. Check out the atmosphere in which the units are to be stored and transported. 

## ●Package 

In terms of the packing format used, make every effort to keep the effects of moisture, organic gases and sulfide gases to the absolute minimum. 

## ●Silicon 

When a source of silicone substances ( silicone rubber, silicone oil, silicone coating materials and silicone filling materials etc. ) is used around the relay, the silicone gas ( low molecular siloxane etc. ) may be produced. This silicone gas may penetrate into the inside of the relay. When the relay is kept and used in this condition, silicone compound may adhere to the relay contacts which may cause the contact failure. Do not use any sources of silicone gas around the relay ( Including plastic sealed types ). 

- ●NOx Generation 

When relay is used in an atmosphere high in humidity to switch a load which easily produces an arc, the NOx created by the arc and the water absorbed from outside the relay combine to produce nitric acid. 

This corrodes the internal metal parts and adversely affects operation. 

Avoid use at an ambient humidity of 85 % RH or higher ( at 20 ℃ ). If use at high humidity is unavoidable, please contact our sales representative. 

Panasonic Industry Co., Ltd. Electromechanical Control Business Division industrial.panasonic.com/ac/e/ 

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ASCTB412E   202301 

Panasonic Industry Co., Ltd. 2023 

GUIDELINES FOR POWER, HIGH-CAPACITY DC CUT OFF AND SAFETY RELAYS USAGE 

## Others 

## ■Cleaning 

- Although the environmentally sealed type relay ( plastic sealed type, etc. ) can be cleaned, avoid immersing the relay into cold liquid ( such as cleaning solvent ) immediately after soldering. Doing so may deteriorate the sealing performance. 

- Cleaning with the boiling method is recommended ( The temperature of cleaning liquid should be 40 ℃ or lower ). Avoid ultrasonic cleaning on relays. Use of ultrasonic cleaning may cause breaks in the coil or slight sticking of the contacts due to ultrasonic energy. 

Please refer to "the latest product specifications" when designing your product. 

- •Requests to customers: https://industrial.panasonic.com/ac/e/salespolicies/ 

Panasonic Industry Co., Ltd. Electromechanical Control Business Division industrial.panasonic.com/ac/e/ 

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ASCTB412E   202301 

Panasonic Industry Co., Ltd. 2023 

■ Global Sales Network Information: industrial.panasonic.com/ac/e/salesnetwork 

Electromechanical Control Business Division 1006, Oaza Kadoma, Kadoma-shi, Osaka 571-8506, Japan industrial.panasonic.com/ac/e/ 

Specifications are subject to change without notice. ������������������ 

©Panasonic Industry Co., Ltd. 2024 

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