Product review (4 stars): Fits And Works - (see review for models this fits)
This fits my Frigidaire "Professional" model dishwasher, model PLD4555.  It will fit the PLD4555RFC, regardless of version (RFC0, RFC1, RFC2, etc.).  It also fits numerous other Galley models.  I apologize for the looong list at the end of this review, but if your model is below, this should fit your dishwasher.

I had a need for a replacement rinse dispenser cap when my original fell out during a wash cycle and was partially melted by the dishwasher's heating element.  Although this is an OEM par, it is white, while the interior and dispenser on many of Electrolux/Frigidaire's dishwashers are gray.  The only way I found to get a replacement in gray would be to replace the entire dispenser.  That would have been unnecessary and costs about 4 or 5 times as much as the cap.  I did find one retailer who advertised what appeared to be a gray cap, but when I contacted them, they confirmed it is white.

As it is, the cap is probably overpriced at over $11.

In the end it does fit and works.  It has a rubber gasket ring on it and it fits the Frigidaire rinse agent cup perfectly.

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TDB210RFB3
TDB210RFB4
TDB210RFB5
TDB210RFB7A
TDB210RFS0
TDB210RFS1
TDB210RFS2
TDB210RFS3
TDB210RFS4
TDB210RFS5
TDB210RFS7A
WDB11NRDB0
WDB11NRDB1
WDB11NRDB2
WDB11NRDB3
WDB11NRDB4
WDB11NRDB5
WDB11NRDQ0
WDB11NRDS0
WDB11NRDS1
WDB11NRDS2
WDB11NRDS3
WDB11NRDS4
WDB11NRDS5
WDB635RBQ0
WDB635RBS0
WDB745REB0
WDB745REB1
WDB745REB2
WDB745RES0
WDB745RES1
WDB745RES2
WDB954MBS0
WDB956MBC0
WWBD2400HB0
WWBD2400HB1A
WWBD2400HB2A
WWBD2400HW0
WWBD2400HW1A
WWBD2400HW2A