C-Spec Reference Guide

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KEMET C-Spec Reference Guide

C-Specs

Customer Specifications (C-Specs) are 4-digit codes found at the end of a part number which specify things like reeling, ESR ratings, or special testing. These are internal codes to KEMET and may not appear on a customer’s BOM. However, they do appear on labels and can cause confusion at receiving. Below are a number of KEMET C-Specs which are commonly used.

 

Note:

KEMET allows distributors and customers to use abbreviations to mark components.

 

For example, TR stands for "tape and reel" and TU stands for "tape/unmarked" on ceramic chips. When these abbreviations are used, the KEMET system will automatically apply the appropriate 4-digit code.

 

Example: C0805C103K5RACTU = C0805C103K5RAC7800 (7800 = standard tape and reel.)

 

ESR rating example: T520D337M004ATE012 (E for ESR, 012 = 12mOhm.)

 

 

Ceramic Capacitors

Multilayer Ceramic Capacitor Chips

Category Description Unmarked Marked1
Standard Reeling Commercial Grade 7" reel, plastic tape ≥ 0805* TU / 78003 TM / 70253
Standard Reeling Commercial Grade 13" reel, plastic tape  ≥ 0805* 7210 7215
Standard Reeling Commercial Grade 7" reel, paper tape 0201, 0402 and 0603 78673 70133
Standard Reeling Commercial Grade 13" reel, paper tape 0402 and 0603 7411 7040
Bulk Commercial Grade bulk (Blank) 3325
Standard Reeling Automotive Grade 7" reel, plastic tape ≥ 0805* AUTO N/A2
Standard Reeling Automotive Grade 13" reel, plastic tape  ≥ 0805* AUTO7210 N/A2
Standard Reeling Automotive Grade 7" reel, paper tape 0201, 0402 and 0603 AUTO N/A2
Standard Reeling Automotive Grade 13" reel, paper tape 0402 and 0603 AUTO7411 N/A2
Bulk  Automotive Grade bulk ABUL N/A2
Quantity-based 7" reels for smaller quantities: Use T+QTY: T500 or T1K0 for 1000 pcs. Txxx See Above
Samples Samples on bulk bag only 3810 N/A

* Except 0805 thickness codes: DC, DD, DJ, DK, DM, DN, DO, DP, DR/DS and CA064 (1632) with Paper Tape.

1. Marking not available for case sizes: EIA 0201, 0402 and EIA 0603 with Flexible Termination.

1. Marking not available for dielectrics: C0G, U2J, X8R, X8G, Y5V and some specific X7R per catalog.

2. All automotive standard C-Specs exclude the option to laser mark components.

3. C-Spec is for internal use only. When ordering, order with Suffix.

 

 

 

Ceramic Leaded Through-Hole

Category Description C-Spec Marked
Reeling Axial C41x, C420, C430, C440 and C1xx, C2xx, CK12, CKR11 - CK16, CKR11 - CKR16 7200 Standard
Ammo Pack Axial Commercial Grade : C41x, C420, C430, C440 7293 Standard
Reeling Radial with H0 16.0±0.5 mm: C3xx* and C05x, C06x, MIL-C-11015, MIL-PRF-39014, CKR 7301 Standard
Reeling Radial with H0 18 mm: C3xx*, C05x, C06x, MIL-C-11015, MIL-PRF-39014, CKR 7303 Standard
Ammo Pack Radial with H0 16.0±0.5 mm: C3xx*, C05x, C06x 7305 Standard
Ammo Pack Radial with H0 18 mm: C3xx*, C05x, C06x 7317 Standard
Bulk All axial C4xx and radial C3xx Commercial Grade products (Blank) Standard
Reeling Axial Automotive Grade : C41x, C420, C430, C440 91707200 Standard
Ammo Pack Axial Automotive Grade : C41x, C420, C430, C440 91707293 Standard
Reeling Radial Automotive Grade with H0 16.0±0.5 mm: C3xx* 91707301 Standard
Reeling Radial Automotive Grade with H0 18 mm: C3xx* 91707303 Standard
Ammo Pack Radial Automotive Grade with H0 16.0±0.5 mm: C3xx* 91707305 Standard
Ammo Pack Radial Automotive Grade with H0 18 mm: C3xx* 91707317 Standard
Bulk All axial C4xx and radial C3xx Automotive Grade products 9170 Standard

* Except C321 and C331 only bulk bag

 

 

Common Military C-Specs (Ceramic)

Category Description C-Spec Marked
CDR
(Mil MLCC)
100 pieces per 7" reel. One date code per reel. One year date code 7185 Standard
CDR
(Mil MLCC)
7" reel. One date code per reel (does not specify full reel increment only) 7189 Standard
CDR
(Mil MLCC)
7" reel. Full reel increments as designated by chip size. One date code per reel 7370 Standard
CDR
(Mil MLCC)
Single date lot code per reel 7956 Standard

 

 

Tantalum Capacitors

Polymer and Tantalum Surface Mount

A700, A720, T48X, T49X, T50X, T51X, T52X, T53X, T54X, T59X series

Category Description C-Spec Marked
Standard Reeling 7" Reel *
N/A* Standard
Big Reel Size 13" Reel * 7280  
Quantity-based Quantity of parts per reel are indicated in the last three digits of the TXXX C-Spec Txxx Standard
ESR Ratings ESR Code in mOhms is indicated in the last three digits of the EXXX cspec
For T493, T495, T496, T498, T499, T520, T521, T522, T530, T545. ESR ratings are called out (E+ESR rating) example: E040 = ESR of 40 mOhms; E1K5 = 1500 mOhms
Exxx Standard
Samples 20 piece increments on a strip of tape 4394
7283
Standard

 

* Please refer to the online catalog for quantities per reel

* Tantalum chips (SMD) come on a 7” reel as a standard, so no reeling spec is necessary. Samples ordered through KEMET Direct will not show a sample C-spec on the label. 

 

 

Tantalum Through Hole

Category Description C-Spec Marked
Bulk Axial Hermetically Sealed
Axial Molded
Radial Molded
Radial Dipped
N/A  
Reeling Axial Hermetically Sealed
Axial Molded
7200 Standard
Reeling Radial Molded
Radial Dipped
7301, 7303 Standard

 

 

Common Military C-Specs (Tantalum)

Category Description C-Spec Marked
CWR (Mil Tant.) Single date/lot code per item + one year date code restriction 7513 Standard
CWR (Mil Tant.) 7" Reels for non-standard quantities, use D+QTY: D100 = 100 pcs/reel Dxxx Standard
CWR (Mil Tant.) Special surge testing 4250, 4251 Standard
T493, T497 COTS ESR screening and surge testing 6110, 6420 Standard