BCF/BSF/BCS Series

Features

Block type ceramic capacitors with high capacitance / high pressure-resistant (630V/2.2μF～50V/350μF). They achieve large ripple current capacitance by low ESR, and high frequency characteristics by low ESL. Specifications can be customized,

Applications

Inverter of electric motor (smoothing and noise reduction), power supply of telecommunication equipments/radar for aerospace industry, decoupling of high frequency power supply for RF sputtering machine etc., Machines which need long lifetime (ex: base stations, transmitters, etc.)

Structure

Rated value, dimension

BCF,BSF Dimensions (Capacitance)
Spec	L(㎜）
Spec	10.0±0.5	15.0±0.5	25.0±0.5	35.0±0.5
50V	100㎌	150㎌	250㎌	350㎌
100V	47㎌	70㎌	120㎌	160㎌
250V	10㎌	15㎌	25㎌	35㎌
630V	3.3㎌	4.7㎌	7.7㎌	12㎌

※T=16.0㎜ max

BCS Dimensions (Capacitance)
Spec	Type①		Type②		Type③		Type④
	L1(㎜)	L2(㎜)	L1(㎜)	L2(㎜)	L1(㎜)	L2(㎜)	L1(㎜)	L2(㎜)
	18.0±0.3	10.0±0.3	23.0±0.3	15.0±0.3	33.0±0.3	25.0±0.3	43.0±0.3	35.0±0.3
50V	100㎌		150㎌		250㎌		350㎌
100V	47㎌		70㎌		120㎌		160㎌
250V	10㎌		15㎌		25㎌		35㎌
630V	2.2㎌		3.3㎌		5.5㎌		7.7㎌

Available Range

EIA Symbol	Rated Voltage (Vdc)	Capacitance(㎌)	Operating Temp. Range(°C)
X7R	50	100~350	-55~+125
X7R	100	47~160	-55~+125
X7R	250	10~35	-55~+125
X7R	630	2.2~12	-55~+125

PCB mounting pattern

Type	A	B	C
①	19.0	14.0	10.0
②	24.0	19.0	15.0
③	34.0	29.0	25.0
④	44.0	39.0	35.0

Comparison of Ripple Absorption Efficiency

For smoothing ability of PWM (Pulse Width Modulation) square wave (for example, switching frequency at 500kHz), block capacitors can achieve better smoothing characteristic with 100uF, compared to aluminum electrolysis capacitors 470uF. As switching frequency goes up higher, it’s possible to reduce the capacitance of block capacitors and miniaturize the size of equipments.

Switching frequency and the substitution
capacitance value of the Al electrolysis condenser
SW freq.	Aluminium(㎌)	Ceramic(㎌)	Capacity Ratio
10kHz	470	220	1/2
20kHz	470	100	1/5
50kHz	470	47	1/10
100kHz	470	22	1/20
200kHz	470	10	1/50
500kHz	470	4.7	1/100
1MHz	470	2.2	1/200