Multilayer ceramic capacitors Chip capacitors, MLSC, X7R Date: October 2006 Data Sheet a EPCOS AG 2006. Reproduction, publication and dissemination of this data sheet and the information contained therein without EPCOS' prior express consent is prohibited. Multilayer ceramic capacitors Chip Multilayer serial ceramic capacitor (MLSC) General The MLSC was developed for typical applications with a direct connection to the battery or generator in the automobile, as it satisfies the requirements of the automobile manufacturers for a series connection of two capacitors for battery applications in a single component. It not only represents the only real alternative to the series connection of discrete capacitors, but also offers advantages over these and other possible solutions, which contain only a single capacitor. Compared with a series circuit made up of conventional ceramic capacitors, it allows the number of components to be reduced. This reduces the space requirement on the circuit board and shortens the placement time. Because fewer components are used, the failure probability is additionally reduced. The MLSC is based on proven MLCC technology, but has a more rugged design. This technology offers highest reliability (ppb rate) on the basis of long field experience. Both undamaged and typically cracked MLSCs are characterized by a high breakdown voltage and high ESD and pulse strength. It may be used at temperatures of up to 150 C with consideration of a voltage derating and with brief temperature peaks of up to 175 C without electrical stressing (refer to the Advanced series). Like the capacitors of the Advanced series, the MLSC is also manufactured to the specifications of the ppb level assurance system, and a bending strength of 2 mm is assured on the basis of the rigorous piezoelectric method. Please read Cautions and warnings and Important notes at the end of this document. 2 10/06 Multilayer ceramic capacitors Chip Multilayer serial ceramic capacitor (MLSC); X7R Ordering code system B37941 X 1 103 K 0 60 Packaging 60 62 70 72 ^ ^ ^ ^ cardboard tape, 180-mm reel blister tape, 180-mm reel cardboard tape, 330-mm reel blister tape, 330-mm reel Internal coding Capacitance tolerance K ^ 10% (standard) Capacitance, coded (example) Rated voltage Internal coding 103 ^ 10 * 103 pF = 10 nF 104 ^ 10 * 104 pF = 100 nF 223 ^ 22 * 103 pF = 22 nF Rated voltage [VDC] Code 50 5 "X" indicates MLSC type Type and size Chip size (inch / mm) Temperature characteristic X7R 0603 / 1608 0805 / 2012 B37931 B37941 Please read Cautions and warnings and Important notes at the end of this document. 3 10/06 100 1 Chip Multilayer ceramic capacitors MLSC; X7R Features Two series-connected ceramic capacitors in a single component The MLSC thus satisfies the requirements of the automobile manufacturers for applications Capacitor 1 on the battery / generator (e.g. clamp 30 or clamp 15) in a single component. Reduction of the effects of a - bending fracture - placement fracture - solder-shock crack thanks to a lower probability of a short circuit. Evaluation criteria: Insulation resistance >10 k after the following treatment bending until crack humidity tests (85 C/85% RH, rated voltage), 14 days The breakdown voltage of MLSCs in the case of a typical bending crack is still greater than five times the rated voltage. Both undamaged and cracked MLSCs are capable of fulfilling the requirements to ISO7637 for 12 V automotive power systems, including load-dump and jump-start requirements (24 V/1 h and 36 V/1 h). To AEC-Q200 Capacitor 2 Termination Solder KKE0427-P-E Applications Automobile electronics - for direct connection to the car battery or generator - at positions with "stranding potential" - as RF filters in small motors (e.g. electrically operated windows) Power electronics (e.g. DC/DC converters) Smoothing capacitors (e.g. on the rechargeable battery in mobile equipment) Cautions A short circuit cannot be completely excluded. The use of MLSCs does not therefore result in 100% fail-safe operation, but in the event of a crack the probability of a short circuit can be greatly reduced. In the event of an untypical (bending) crack formation (e.g. double-sided crack or extreme mounting crack) and other mechanical or thermal damage to the capacitor, the capacitor may have a low ohmic state. Termination Crack Solder KKE0387-F-E Please read Cautions and warnings and Important notes at the end of this document. 4 10/06 Multilayer ceramic capacitors MLSC MLSC; X7R Termination For soldering: Nickel barrier termination (Ni) Delivery mode Cardboard and blister tape (blister tape for chip thickness 1.2 0.1 mm), 180-mm and 330-mm reel available Electrical data Temperature characteristic Max. relative capacitance change within -55 C to +125 C Climatic category (IEC 60068-1) Standard Dielectric Rated voltage1) Test voltage Capacitance range / E series Dissipation factor (limit value) Insulation resistance 2) at + 25 C Insulation resistance 2) at +125 C Time constant 2) at + 25 C Time constant 2) at +125 C Operating temperature range Ageing 3) X7R DC/C VR Vtest CR tan d Rins Rins t t Top 1) Note: No operation on AC line. 2) For CR >10 nF the time constant t = C * Rins is given. 3) Refer to chapter "General technical information", "Ageing". Please read Cautions and warnings and Important notes at the end of this document. 5 10/06 15 55/125/56 EIA Class 2 50, 100 2.5 * VR/5 s 1 nF ... 100 nF (E6) < 25 * 10 -3 >105 >104 >1000 >100 -55 ... +125 yes % VDC VDC MW MW s s C Multilayer ceramic capacitors MLSC MLSC; X7R Capacitance tolerances Code letter K (standard) Tolerance 10% Dimensional drawing s b k k KKE0329-N Dimensions (mm) Case size (inch) (mm) 0603 1608 0805 2012 l 1.6 0.15 2.00 0.20 b 0.8 0.10 1.25 0.15 s 0.8 0.10 k 0.1 -0.40 1.35 max. 0.13 -0.75 Tolerances to CECC 32101-801 Please read Cautions and warnings and Important notes at the end of this document. 6 10/06 Multilayer ceramic capacitors MLSC MLSC; X7R Recommended solder pad C A D KKE0308-1 Recommended dimensions (mm) for reflow soldering Case size (inch/mm) Type A C D 0603/1608 0805/2012 single chip single chip 0.6 ... 0.7 0.6 ... 0.7 1.8 ... 2.2 2.2 ... 2.6 0.6 ... 0.8 0.8 ... 1.1 Recommended dimensions (mm) for wave soldering Case size (inch/mm) Type A C D 0603/1608 single chip 0.8 ... 0.9 2.2 ... 2.8 0.6 ... 0.8 0805/2012 single chip 0.9 ... 1.0 2.8 ... 3.2 0.8 ... 1.1 Termination Termination (nickel barrier) Ceramic body Inner electrode NME AgPd BME Ni Substrate electrode Intermediate electrode External electrode NME Ag Ni Sn BME Cu Ni Sn NME: Noble Metal Electrode BME: Base Metal Electrode KKE0407-Y-E Please read Cautions and warnings and Important notes at the end of this document. 7 10/06 MLSC Multilayer ceramic capacitors MLSC; X7R Product range for MLSC chip capacitors, X7R Size1) inch mm Type VR (VDC) CR 0603 1608 0805 2012 B37931 B37941 50 50 100 1.0 nF 1.5 nF 2.2 nF 3.3 nF 4.7 nF 6.8 nF 10 nF 15 nF 22 nF 33 nF 47 nF 68 nF 100 nF 1) l b (inch) / l b (mm) Please read Cautions and warnings and Important notes at the end of this document. 8 10/06 Multilayer ceramic capacitors MLSC MLSC; X7R; 0603 and 0805 Ordering codes and packing for X7R, 50 and 100 VDC, nickel barrier terminations mm Cardboard tape, AE 180-mm reel ** ^ 60 pcs/reel Cardboard tape, AE 330-mm reel ** ^ 70 pcs/reel 0.8 0.1 0.8 0.1 0.8 0.1 0.8 0.1 0.8 0.1 0.8 0.1 0.8 0.1 4000 4000 4000 4000 4000 4000 4000 16000 16000 16000 16000 16000 16000 16000 0.8 0.1 0.8 0.1 1.25 0.1 1.25 0.1 4000 4000 3000 2) 3000 2) 16000 16000 12000 3) 12000 3) 0.8 0.1 0.8 0.1 0.8 0.1 0.8 0.1 0.8 0.1 0.8 0.1 0.8 0.1 0.8 0.1 0.8 0.1 4000 4000 4000 4000 4000 4000 4000 4000 4000 16000 16000 16000 16000 16000 16000 16000 16000 16000 Chip thickness CR1) Ordering code Case size 0603, 50 VDC 1.0 nF 1.5 nF 2.2 nF 3.3 nF 4.7 nF 6.8 nF 10. nF B37931X5102K0** B37931X5152K0** B37931X5222K0** B37931X5332K0** B37931X5472K0** B37931X5682K0** B37931X5103K0** Case size 0805, 50 VDC 33. 47. 68. 100. nF nF nF nF B37941X5333K0** B37941X5473K0** B37941X5683K0** B37941X5104K0** Case size 0805, 100 VDC 1.0 nF 1.5 nF 2.2 nF 3.3 nF 4.7 nF 6.8 nF 10. nF 15. nF 22. nF B37941X1102K0** B37941X1152K0** B37941X1222K0** B37941X1332K0** B37941X1472K0** B37941X1682K0** B37941X1103K0** B37941X1153K0** B37941X1223K0** 1) Other capacitance values on request. 2) Blister tape, 180-mm reel, ordering code ** ^ 62 3) Blister tape, 330-mm reel, ordering code ** ^ 72 Please read Cautions and warnings and Important notes at the end of this document. 9 10/06 Multilayer ceramic capacitors MLSC MLSC; X7R Typical characteristics 1) Capacitance change DC/C25 versus temperature T KKE0401-J 15 % C C 25 Capacitance change DC/C0 versus superimposed DC voltage V KKE0402-S 10 % C C0 0 5 0 100 nF/50 V/size 0805 _ 10 _5 _ 20 _ 10 _ 15 _ 20 _ 25 _ 30 _ 35 _ 40 _ 45 _ 50 _ 60 _ 40 _ 20 0 20 40 60 80 100 120 C 160 _ 30 _ 40 _ 50 _ 60 _ 70 0 T Impedance |Z| versus frequency f for case size 0603 5 10 15 20 25 30 35 40 45 50 V V Impedance |Z| versus frequency f for case size 0805 KKE0403-1 10 3 KKE0404-9 10 3 Case size 0603 Z Case size 0805 Z 10 2 10 2 1 nF 10 1 1 nF 10 1 10 nF 10 0 10 nF 10 0 100 nF 10 10 _1 10 _2 10 0 10 1 10 2 10 3 MHz 10 f 10 4 _1 _2 10 0 10 1 10 2 10 3 MHz 10 4 f 1) For more detailed information on frequency behavior and characteristics see www.epcos.com/mlcc_impedance. Please read Cautions and warnings and Important notes at the end of this document. 10 10/06 Multilayer ceramic capacitors MLSC MLSC; X7R Typical characteristics 1) Dissipation factor tan d versus temperature T 10 Insulation resistance Rins versus temperature T _1 KKE0430-X KKE0428-L 10 8 M tan R ins 10 6 10 _2 10 5 10 4 10 3 _ 10 _3 _ _ 60 40 20 0 20 40 60 80 100 120 C 160 T 10 2 0 20 40 60 80 100 120 C 160 T Capacitance change DC/C1 versus time t C C1 KKE0394-X 10 % 5 0 _5 _ 10 _ 15 _ 20 10 0 10 1 10 2 10 3 10 4 h 10 5 t 1) For more detailed information on frequency behavior and characteristics see www.epcos.com/mlcc_impedance. Please read Cautions and warnings and Important notes at the end of this document. 11 10/06 Multilayer ceramic capacitors Cautions and warnings Notes on the selection of ceramic capacitors In the selection of ceramic capacitors, the following criteria must be considered: 1. Depending on the application, ceramic capacitors used to meet high quality requirements should at least satisfy the specifications to AEC-Q200. They must meet quality requirements going beyond this level in terms of ruggedness (e.g. mechanical, thermal or electrical) in the case of critical circuit configurations and applications (e.g. in safety-relevant applications such as ABS and airbag equipment or durable industrial goods). 2. At the connection to the battery or power supply (e.g. clamp 15 or 30 in the automobile) and at positions with stranding potential, to reduce the probability of short circuits following a fracture, two ceramic capacitors must be connected in series and/or a ceramic capacitor with integrated series circuit should be used. The MLSC from EPCOS contains such a series circuit in a single component. 3. Ceramic capacitors with the temperature characteristics Z5U and Y5V do not satisfy the requirements to AEC-Q200 and are mechanically and electrically less rugged than C0G or X7R/X8R ceramic capacitors. In applications that must satisfy high quality requirements, therefore, these capacitors should not be used as discrete components (see the chapter "Effects on mechanical, thermal and electrical stress", point 1.4). 4. For ESD protection, preference should be given to the use of multilayer varistors (MLV) (see the chapter "Effects on mechanical, thermal and electrical stress", point 1.4). 5. An application-specific derating or continuous operating voltage must be considered in order to cushion (unexpected) additional stresses (see the chapter "Reliability"). The following should be considered in circuit board design 1. If technically feasible in the application, preference should be given to components having an optimal geometrical design. 2. At least FR4 circuit board material should be used. 3. Geometrically optimal circuit boards should be used, ideally those that cannot be deformed. 4. Ceramic capacitors must always be placed a sufficient minimum distance from the edge of the circuit board. High bending forces may be exerted there when the panels are separated and during further processing of the board (such as when incorporating it into a housing). 5. Ceramic capacitors should always be placed parallel to the possible bending axis of the circuit board. 6. No screw connections should be used to fix the board or to connect several boards. Components should not be placed near screw holes. If screw connections are unavoidable, they must be cushioned (for instance by rubber pads). 12 10/06 Multilayer ceramic capacitors Cautions and warnings The following should be considered in the placement process 1. Ensure correct positioning of the ceramic capacitor on the solder pad. 2. Caution when using casting, injection-molded and molding compounds and cleaning agents, as these may damage the capacitor. 3. Support the circuit board and reduce the placement forces. 4. A board should not be straightened (manually) if it has been distorted by soldering. 5. Separate panels with a peripheral saw, or better with a milling head (no dicing or breaking). 6. Caution in the subsequent placement of heavy or leaded components (e.g. transformers or snap-in components): danger of bending and fracture. 7. When testing, transporting, packing or incorporating the board, avoid any deformation of the board not to damage the components. 8. Avoid the use of excessive force when plugging a connector into a device soldered onto the board. 9. Ceramic capacitors must be soldered only by the mode (reflow or wave soldering) permissible for them (see the chapter "Soldering directions"). 10. When soldering the most gentle solder profile feasible should be selected (heating time, peak temperature, cooling time) in order to avoid thermal stresses and damage. 11. Ensure the correct solder meniscus height and solder quantity. 12. Ensure correct dosing of the cement quantity. 13. Ceramic capacitors with an AgPd external termination are not suited for the lead-free solder process: they were developed only for conductive adhesion technology. This listing does not claim to be complete, but merely reflects the experience of EPCOS AG. 13 10/06 Multilayer ceramic capacitors Important notes The following applies to all products named in this publication: 1. Some parts of this publication contain statements about the suitability of our products for certain areas of application. These statements are based on our knowledge of typical requirements that are often placed on our products in the areas of application concerned. We nevertheless expressly point out that such statements cannot be regarded as binding statements about the suitability of our products for a particular customer application. As a rule, EPCOS is either unfamiliar with individual customer applications or less familiar with them than the customers themselves. For these reasons, it is always ultimately incumbent on the customer to check and decide whether an EPCOS product with the properties described in the product specification is suitable for use in a particular customer application. 2. We also point out that in individual cases, a malfunction of passive electronic components or failure before the end of their usual service life cannot be completely ruled out in the current state of the art, even if they are operated as specified. In customer applications requiring a very high level of operational safety and especially in customer applications in which the malfunction or failure of a passive electronic component could endanger human life or health (e.g. in accident prevention or life-saving systems), it must therefore be ensured by means of suitable design of the customer application or other action taken by the customer (e.g. installation of protective circuitry or redundancy) that no injury or damage is sustained by third parties in the event of malfunction or failure of a passive electronic component. 3. The warnings, cautions and product-specific notes must be observed. 4. In order to satisfy certain technical requirements, some of the products described in this publication may contain substances subject to restrictions in certain jurisdictions (e.g. because they are classed as "hazardous"). Useful information on this will be found in our Material Data Sheets on the Internet (www.epcos.com/material). Should you have any more detailed questions, please contact our sales offices. 5. We constantly strive to improve our products. Consequently, the products described in this publication may change from time to time. The same is true of the corresponding product specifications. Please check therefore to what extent product descriptions and specifications contained in this publication are still applicable before or when you place an order. We also reserve the right to discontinue production and delivery of products. Consequently, we cannot guarantee that all products named in this publication will always be available. 6. Unless otherwise agreed in individual contracts, all orders are subject to the current version of the "General Terms of Delivery for Products and Services in the Electrical Industry" published by the German Electrical and Electronics Industry Association (ZVEI). 7. The trade names EPCOS, EPCOS-JONES, Baoke, CeraDiode, CSSP, MLSC, PhaseCap, PhaseMod, SIFERRIT, SIFI, SIKOREL, SilverCap, SIMID, SIOV, SIP5D, SIP5K, UltraCap, WindCap are trademarks registered or pending in Europe and in other countries. Further information will be found on the Internet at www.epcos.com/trademarks. 14 10/06