Product Overview
One RCA SK930, still in the bag RCA sent it out in
Condition
Listed New. The SK930 sits inside its original RCA hang bag, which carries a crimped seam across the top and bottom edges, and every photo here was taken through that film, including the closeups of the part itself. Behind the printed label is a folded yellow spec sheet from RCA's Distributor and Special Products Division in Deptford, New Jersey. The label carries the SK930 number, the line "Thermal Cutoff Device 240°C Limit", a boxed 8242 code and a dimension diagram, and the bag is printed Made in U.S.A. The component itself is a dark cylindrical body with a white tapered section at one lead end and long axial leads; printing on the body is only partly legible through the plastic, so we are not transcribing it. A thermal cutoff opens once and does not reset, which means it cannot be verified without being destroyed, so this one has not been tested and is offered on its markings and the photos. Stock is one piece, and the photos are of that piece.
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Product Overview
The RCA SK930 is a thermal cutoff device with a 240°C limit in an axial lead package, the format used when a temperature fuse has to sit in line with a winding, a heater lead or a hot spot on a chassis. The mechanical spec comes straight off the diagram printed on the bag label: 3.34 inches (84.8 mm) overall including leads, a 0.457 inch (11.6 mm) body section, a 1.38 inch span called out at the right-hand lead, whose millimetre figure has a broken leading digit on the print and is not transcribed here, and a 0.158 inch (4.01 mm) body diameter. A thermal cutoff is a one-shot part by design, holding the circuit closed until its rated temperature arrives and then opening permanently, which is why it shows up in equipment where an overheat is supposed to end in a hard stop rather than a retry. SK930 is RCA's own SK replacement-line number, the series service techs cross-referenced into when they needed a part for a set on the bench, and the folded sheet in the bag is the paperwork that shipped with it. Current and voltage ratings are not printed on the outside of the bag and are not confirmed here - verify against the datasheet before use.
Key Features
- Thermal cutoff device, 240°C limit, as printed on the RCA label
- RCA SK Series number SK930, printed on the bag label
- Axial lead body, 0.158 in (4.01 mm) diameter and a 0.457 in (11.6 mm) body section per the label diagram
- 3.34 in (84.8 mm) overall length including leads per the label diagram
- One-shot, non-resetting design: opens at the rated temperature and stays open
- Folded RCA spec sheet visible in the bag with the part
- Bag printed Made in U.S.A., with a boxed 8242 code on the label
- Current and voltage ratings not confirmed - verify against the datasheet before use
Applications
- A television and audio repair tech working from an old SK cross-reference guide who has finally turned up the SK930 the guide points to
- A restorer of vintage consumer electronics who wants a period-correct 240°C cutoff rather than a modern part with a different body and lead length
- A bench engineer studying a legacy overheat protection circuit who needs an original-spec cutoff to measure a modern equivalent against
- A collector of RCA service-line parts who wants a packaged SK number with its label, diagram and spec sheet still together
Frequently Asked Questions
What does a 240°C thermal cutoff actually do?
It stays closed and passes current through normal operation, and when the temperature at the body reaches its rated limit it opens and stays open. There is no reset and no self-healing. That is the whole point of the part: the failure it protects against ends the circuit rather than cycling it.
What current and voltage is this SK930 rated for?
Those numbers are not printed on the outside of the bag, so we are not confirming them. The 240°C limit, the SK930 number and the mechanical dimensions are all printed on the label and shown in the photos. For the electrical ratings, verify against the datasheet before use.
What is inside the bag?
The photos show the thermal cutoff and a folded yellow RCA spec sheet from the Distributor and Special Products Division, both behind the printed label. Only parts of the sheet's text are readable through the plastic, so we are describing what the camera can see rather than cataloging the sheet.
Nobody can test a thermal cutoff. What am I taking on?
You are getting one SK930 in the RCA bag shown, with the spec sheet that came with it, and you are taking on the fact that we have not proven it opens at 240°C. The only test for this part is a destructive one, and a tested thermal cutoff is scrap. So the label, the printed diagram and the photos are the spec, and you are buying the exact piece in front of the camera instead of a description of something in a bin. Shipping is a flat $8 for the order and free once the order passes $28, and orders leave our Idaho warehouse the same or next business day.
A thermal cutoff is the one part in a chassis that gets exactly one chance to do its job, and RCA still packed a spec sheet in with it in case that day ever came. If you are chasing an SK930 out of an old cross-reference guide, this one's chance is still ahead of it.
