Allegro Microsystems Inc · Electronic Components
A3977
Microstepping DMOS Driver with Translator
Part NumberA3977
ManufacturerAllegro Microsystems Inc
AvailabilityAvailable to order — request a quote
Specifications
NSN5315-00-039-5563 (NSN)
Federal Item NamePIN,SPRING
MaterialSTEEL COMP 410 OR STEEL COMP 420 OVERALL
Overall Length0.360 INCHES MINIMUM AND 0.390 INCHES MAXIMUM
Surface Treatment Document And ClaASTM A380 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
Surface TreatmentPASSIVATE OVERALL
Shear Strength1000 DOUBLE POUND
Style DesignatorSLOTTED
Hardness Rating43.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM OVERALL
Surface Finish80.0 MICROINCHES OUTSIDE DIAMETER
Material Document And Classificati66 FED STD ALL MATERIAL RESPONSES OVERALL
Material Thickness0.022 INCHES NOMINAL
Federal Supply Class5315 — Nails, Machine Keys, And Pins
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 A3977 available?
We can source A3977 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 A3977 by Allegro Microsystems Inc obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If A3977 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 A3977?
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 A3977?
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.