CS13B H105K Hermetically Sealed Axial Tantalum Capacitor, 1.0 uF 75 V, 10 Percent CS13BH105K
- 2 photos
Never used. The original pack has been opened, or the quantity was split off a full reel or tube. Leads are original and unclipped.
New old stock, open stock on the grading scaleSend the quantity you need. You get a quote back with shipping before anything is charged.
Video
Filmed on the bench. Sound is stripped from product clips.
- 0:16
Specifications
| Specification | Value |
|---|---|
| Identification | |
| Part number | CS13BH105K |
| Manufacturer | Not recorded |
| Condition | New old stock, open stock |
| Date code | Not recorded |
| Package | Hermetically sealed metal cylindrical case, axial wire leads |
| Country of origin | Not recorded |
| Family | CS13 |
| Stock number | SDWCSQPE |
| Overview | |
| Type | Solid tantalum in a hermetically sealed metal case |
| Style designation | CS13B, printed on the case |
| Suggested use | Timing, coupling and filtering where a close tolerance and a sealed case are wanted |
| Voltage headroom | 75 V is high for a solid tantalum, so it carries real margin on a low voltage rail |
| Electrical | |
| Capacitance | 1.0 uF, from the 105 code and printed as 1.0 on the case |
| Tolerance | Plus or minus 10 percent, from the K code |
| DC voltage rating | 75 V, printed on the case |
| Polarity | Polarised. Reverse voltage can cause a short circuit failure |
| Markings as read | |
| Marking, face 1 | CS13B over H105K |
| Marking, face 2 | 75V 1.0 |
| Physical | |
| Case | Hermetically sealed metal cylinder with sealed lead exits |
| Lead style | Axial, one tinned wire lead from each end |
| Not established | |
| Manufacturer | Not identified. No maker's name or CAGE code appears on the case |
| Date code | Not established. No date code is legible |
| Provenance | |
| Quantity offered | One piece |
| Condition | New old stock, unused, case clean and leads unsoldered |
| Basis of identification | Both markings are printed on the case. The accompanying handwritten inventory note agrees with them and adds nothing |
About this part
A hermetically sealed metal cased axial tantalum capacitor to military style CS13B, marked H105K, 1.0 uF at 75 volts. New old stock, unused.
Everything in that first sentence is printed on the case, which is worth saying because this part arrived with handwritten inventory paperwork as well. Where paperwork and part could disagree they do not: the body itself carries CS13B and H105K on one face and 75V 1.0 on another, so the value and the voltage are read from the capacitor rather than taken from someone's note.
The code decodes cleanly. In the three digit convention 105 means 10 followed by five zeros in picofarads, which is 1.0 uF, and the trailing K is the tolerance letter for plus or minus 10 percent. Ten percent is a tight tolerance for a tantalum and is part of why a part like this was specified.
CS is the military style designation for a solid tantalum in a hermetically sealed metal case, and the 75 volt rating is at the high end for solid tantalum, which is a detail worth noticing. Most solid tantalums stop well below that. A 75 volt part has a thicker dielectric and correspondingly more margin when used on the low voltage rails most people will put it on.
It is polarised, and a reversed tantalum can fail as a short circuit rather than simply degrading. Establish the positive end from the case before fitting it, and derate as usual.
Questions about this part
Does the value come from the part or from the paperwork?
From the part. This capacitor arrived with a handwritten inventory note, and handwriting is always weaker evidence than a printed marking, so it is worth being explicit: the case itself carries CS13B and H105K on one face and 75V 1.0 on another. The paperwork agrees with the case and adds nothing that the case does not already say.
What does H105K decode to?
The 105 is the standard three digit picofarad code, two significant figures then the number of zeros, so 10 followed by five zeros is 1000000 pF, which is 1.0 uF. The K is the tolerance letter and means plus or minus 10 percent. The leading H is part of the manufacturer's own numbering rather than an electrical parameter.
Is 75 volts unusual for a tantalum?
It is toward the top of the range for a solid tantalum, yes. Most of the solid tantalums people encounter are rated between 6 and 35 volts, and the chemistry gets progressively harder to build as the voltage climbs. A 75 volt part has a thicker dielectric and, used on the low voltage rails typical of transistor equipment, carries a good deal more margin than the original designer may have needed.
What does CS mean in the style designation?
CS is the military style code for a solid tantalum capacitor in a hermetically sealed metal case, with the number following it identifying the case size and the letter denoting a variant within that. It tells you the construction and the qualification family rather than the electrical value, which is carried separately in the part number that follows.
How careful do I need to be about polarity?
Careful. A tantalum is polarised, and unlike an aluminium electrolytic that simply degrades and vents when reversed, a tantalum can fail as a dead short. On a low impedance supply that means the fault current is limited only by the supply, which produces heat and sometimes flame. Identify the positive end from the case marking before soldering it in.
Does it need reforming after long storage?
No. That is an aluminium electrolytic problem, caused by the oxide layer deteriorating while the part sits unpowered in a wet electrolyte. A solid tantalum has no liquid and its dielectric does not degrade on the shelf, and a hermetic metal case protects it from humidity as well. It can go straight into service, derated as any tantalum should be.
What condition is this one in?
New old stock, open stock, never fitted. The metal case is clean with no dents or corrosion, both lead seals are intact, the printing on both marked faces is fully legible and the leads are straight and unsoldered. The photographs show the actual capacitor you would receive.