MICRO SWlTCHa HoneywelI Division

Installation instructions for 8SSmagnetically operated hall effect position sensors

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GENERAL INFORMATIONThe Hall effect integrated circuit is mounted on a ceramic baseusing the solder reflow (flip chip) process and is covered witheither a brass cap or a hard epoxy coating. 8SS sensors areprimarily intended for high volume applications requiring min-imal handling. The preferred mounting and terminationmethod is soldering to a printed circuit board.The 8SS offers 3-pin in-line PC board terminals on .100"mounting centers. Listings with solder pads or leadwires arealso available. 8SS sensors are used with 4.5 to 5.5 VDC or 6 to16 VDC power supplies. The single output is current sinking(8SS9, current sourcing).

Bipolar devices have a plus (Southpole) maximum operate point, and aminus (North pole) minimum releasepoint. Operate and release points canbe both positive or both negative.Unipolar devices require a South poleto turn ON. Removal of the South poleturns them OFF.

*Unless otherwise noted in Magnetic Characteristics chart, magnetic operating characteristics are identical for all options withintypes (ie.. all 8SS1A listings will have the same magnetic characteristics) Standard 8SS devices (brass caps and .210" terminals)can be listed in two ways (i.e., 8SS1 or 8SS1A1).

FLUID RESISTANCEFluid resistance testing, using fluids characteristic of those

SWITCH believes the following information to be accurate, butrecommends customer testing when compatibility is of

generally found in industry, has been completed. MICRO concern.

CompatibleTypical FluidMethyl acetatePetroleum etherAcetoneMethyl alcoholGasolineTolueneStoddard solventTrichloroethyleneSodium hydroxide

General Typeesteretherketonealcoholhydrocarbon, aliphatichydrocarbon, aromaticsolvents, industrialsolvents, chlorinatedalkali, strong

Not CompatibleTypical fluid

Sulfuric acid, 5%Sulfuric acid, 50%Sodium hydroxide, 5%

General Typeacid, weakacid, strongalkali, weak

Note: Test conditions -for 12 days.

complete immersion at 24C (75F) Since most of the compatible fluids evaporate rapidly at 24C(75F), MICRO SWITCH does not expect them to affect the8SS devices at elevated temperatures, or under splash condi-tions, providing no power is applied. If power is to be applied,the use of a suitable coating applied over the terminals toprevent galvanic corrosion is recommended.

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SOLDERING INSTRUCTIONSHand soldering:

CLEANING

Use 60/40 rosin core solder, employing a 399C (750F) con-Proper cleaning fluids should be selected, based on the type ofcontaminants to be removed. MICRO SWITCH recommends

trolled temperature, 1/8" chisel tip soldering iron. To avoiddelamination of the terminals from the ceramic, do not hold theiron on the terminals for more than 4 seconds (solder pads, 3seconds). The temperature of the lead at the ceramic conduc-tor must not exceed 250C (482F).Wave solderingUse Loncoflux 106A35 or equivalent. Preheater-s should be setfor 95C (200F) on top (component side) of PC board justprior to board entering wave. (This may have to be adjusteddepending upon board thickness.) Solder temperature shouldbe a maximum of 260C (500F), preferably 252C to 260C(485F to 500F). Set conveyor speed to approximately 4.5feet per minute (1,37 meter/min.). Select a speed which givesfull solder fillets and a minimum of bridging and icicles. Theprinted circuit board requires rigid support during wavesoldering.

use of the following:AlcoholsChlorinated solventsFluorinated solvents

WARNING

Handling - The ceramic may be fractured if subjected toImpact. Handle with care. Terminals may be formed if sup-ported between form and ceramic substrate during bend-ing .

Electrical - Do not exceed maximum ratings. Do not reversesupply voltage polarity.

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Warranty/RemedySeller warrants its products to be free from defects in design,material and workmanship under normal use and service.Seller will repair or replace without charge any such product itfinds to be so defective on its return to Seller within 18 monthsafter date of shipment by Seller. The foregoing is in lieu of allother expressed or implied warranties (except of title), includ-ing those of. merchantability and fitness for a particular pur-pose. The foregoing is also purchaser's sole remedy and is inlieu of all other guarantees, obligations, or liabilities or anyconsequential, incidental, or punitive damages attributable tonegligence or strict liability, all by way of example.

MICRO SWITCH Worldwide Sales and ServiceMICRO SWITCH serves its customers through a worldwidenetwork of sales offices and distributors. For applicationassistance, pricing or name of nearest Authorized Distributor,contact a nearby MICRO SWITCH sales office. Or, writeMICRO SWITCH, Freeport, Illinois 61032; phone 815/235-6600.

While we provide application assistance on MICRO SWITCHproducts, personally and through our literature, it is up to thecustomer to determine the suitability of the product in theapplication.

MICRO SWITCHa Honeywell Division

PK 87582 383 Printed in USA