Automatic Switch · Electronic Components
PB11B/KT11A4
Protector, Thermal-Overload, Elect
Part NumberPB11B/KT11A4
ManufacturerAutomatic Switch
AvailabilityAvailable to order — request a quote
Specifications
NSN6110-01-372-6686 (NSN)
Federal Item NamePROTECTOR,THERMAL-OVERLOAD,ELECT
Federal Supply Class6110 — Electrical Control Equipment
Overall Height8.750 INCHES NOMINAL
Current Rating In Amps100.0
Overall Length10.750 INCHES NOMINAL
PhaseTHREE
Overall Width5.500 INCHES NOMINAL
End Item Identification DesignatorPSA GENERATOR
Frequency Rating60.0 HERTZ NOMINAL
Operation TypeAUTOMATIC
Pole Quantity3
Current TypeAC/DC
Vendor Part Numbers1551AS123-2
RH Electronics, Inc. — independent stocking distributor since 1982.
Every shipment inspected on receipt · ISO 9001:2015 · ANSI/ESD S20.20 · ERAI member since 1998 · GIDEP participant
Every shipment inspected on receipt · ISO 9001:2015 · ANSI/ESD S20.20 · ERAI member since 1998 · GIDEP participant
Frequently asked
Is PB11B/KT11A4 available?
We can source PB11B/KT11A4 even if it isn't in our active stock list. As an independent distributor we reach inventory outside the franchise channel — including hard-to-find and obsolete parts. Send us a quote request.
Is PB11B/KT11A4 by Automatic Switch obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If PB11B/KT11A4 has been discontinued, we can often source remaining stock or qualified alternates. Contact us with your quantity and target date.
How does RH Electronics verify parts like PB11B/KT11A4?
Every incoming shipment is inspected under our ISO 9001:2015 quality system — documentation, markings, and construction checked against known-good references. For deeper analysis, we direct work through accredited independent labs. We've been an ERAI member since 1998 and a GIDEP participant.
Can you find a cross-reference or alternate for PB11B/KT11A4?
Yes. Our team reads part numbers the way they were designed — decoding family, speed, temperature grade, package, and reliability level — to identify acceptable alternates when the exact part isn't available. Submit a quote request and we'll advise.