?¡À??Model No
??????The Model No.of Buzzer Chips is compose of
??????six parts(see the picture)??,piezo ceramic element??
????Illustration
??????the first part:"FT" indicate Piezoeletric
??????Ceramic Buzzer Chips,piezo ceramic element

??????the second part:use the Arab figure to
??????express plate exotic dismeter(mm)

??????the third part:use denominator to express
??????plate material;For example:
??????T-brass,G-stainless steel,N-iron and nickel
??????alloy,M-horse mouth iron

??????the fourth part:use the Arab figure to
??????express frequency(kHz)

??????the fifth part:use denominator to express
??????electrode shape;For example:
??????A-round,B-partition shape,C-square,D-
??????unnormal shape

??????the sixth part:use the Arab figure to
??????express structure;For example:
??????1-single side,2-double sides

??3.Paradigm
??????For example:piezoeletric ceramic buzzer
??????chips FT-27T-4.1A1 Q/WZOX 1-2002.piezo ceramic element.

??????The example indicate:the piezoeletric
??????ceramic buzzer chips'plate exotic dismeter
??????is 27mm and brass,resonant frequency is
??????4.1kHz,round electrode and single side.And
??????the product's normal code is Q/WZOX 1-2002.

Model NO	Resonant Frequency (kHz)	Resonant Impedance (Ω)	Capacity ±30%(nF)	Dimensions(mm)				Plate Material
				D	d	t	T
FT-12T-5.8A1	5.8±0.6	≤500	16	12.0	9.4	0.05	0.12	Brass
FT-12T-9.0A1	9.0±0.8	≤300	10	12.0	9.4	0.10	0.21	Brass
FT-12T-12A1	12±1.0	≤300	5.5	12.0	9.4	0.15	0.29	Brass
FT-13T-7.4A1	7.4±0.6	≤300	11	13.0	10.0	0.10	0.20	Brass
FT-13.5T-7.7A1	7.7±0.8	≤300	11	13.5	10.0	0.10	0.21	Brass
FT-15T-4.0A1	4.0±0.5	≤400	22	15.0	11.0	0.07	0.14	Brass
FT-15T-5.0A1	5.0±0.5	≤400	17	15.0	11.0	0.09	0.18	Brass
FT-15T-6.0A1	6.0±0.5	≤400	14	15.0	11.0	0.11	0.22	Brass
FT-20T-3.0A1	3.0±0.3	≤300	30	20.0	15.0	0.10	0.19	Brass
FT-20T-4.5A1	4.5±0.4	≤300	26	20.0	15.0	0.19	0.30	Brass

Model NO	Resonant Frequency (kHz)	Resonant Impedance (Ω)	Capacity ±30%(nF)	Dimensions(mm)				Plate Material
				D	d	t	T
FT-20T-6.0A1	6.0±0.5	≤300	14	20.0	15.0	0.20	0.40	Brass
FT-20T-7.0A1	7.0±0.6	≤300	14	20.0	15.0	0.26	0.45	Brass
FT-21T-3.0A1	3.0±0.3	≤300	26	21.0	15.0	0.10	0.21	Brass
FT-21T-4.4A1	4.4±0.5	≤300	18	21.0	15.0	0.15	0.31	Brass
FT-21G-3.3A1	3.3±0.5	≤300	26	21.5	15.0	0.10	0.21	Steel
FT-21G-4.1A1	4.1±0.3	≤300	22	21.0	15.0	0.15	0.28	Steel
FT-27T-2.1A1	2.1±0.3	≤200	40	27.0	20.0	0.13	0.26	Brass
FT-27T-3.0A1	3.0±0.3	≤200	34	27.0	20.0	0.15	0.31	Brass
FT-27T-3.9A1	3.9±0.4	≤200	25	27.0	20.0	0.26	0.47	Brass
FT-27T-4.3A1	4.3±0.4	≤200	22	27.0	20.0	0.26	0.50	Brass

Model NO	Resonant Frequency (kHz)	Resonant Impedance (Ω)	Capacity ±30%(nF)	Dimensions(mm)				Plate Material
				D	d	t	T
FT-27T-5.0A1	5.0±0.5	≤200	25	27.0	20.0	0.38	0.60	Brass
FT-27G-2.2A1	2.2±0.3	≤200	50	27.0	20.0	0.10	0.21	Steel
FT-27G-3.1A1	3.1±0.3	≤200	32	27.0	20.0	0.15	0.31	Steel
FT-27G-4.1A1	4.1±0.3	≤200	25	27.0	20.0	0.20	0.41	Steel
FT-31T-1.5A1	1.5±0.3	≤800	40	31.0	20.0	0.10	0.23	Brass
FT-31T-2.6A1	2.6±0.5	≤300	26	31.0	20.0	0.26	0.48	Brass
FT-31T-4.0A1	4.0±0.5	≤300	30	31.0	20.0	0.30	0.58	Brass
FT-31N-1.2A1	1.2±0.3	≤500	50	31.0	20.0	0.10	0.21	The nickel alloy of iron
FT-31G-1.4A1	1.4±0.3	≤500	50	31.0	20.0	0.10	0.21	Steel
FT-32T-3.3A1	3.3±0.2	≤300	32	38.0	25.0	0.26	0.52	Brass

Model NO	Resonant Frequency (kHz)	Resonant Impedance (Ω)	Capacity ±30%(nF)	Dimensions(mm)				Plate Material
				D	d	t	T
FT-35T-1.2A1	1.2±0.3	≤200	66	35.0	25.0	0.26	0.52	Brass
FT-35T-1.6A1	1.6±0.3	≤200	50	35.0	25.0	0.15	0.31	Brass
FT-35T-2.1A1	2.1±0.3	≤200	42	35.0	25.0	0.20	0.39	Brass
FT-35T-2.6A1	2.6±0.3	≤200	33	35.0	25.0	0.25	0.50	Brass
FT-35T-2.9A1	2.9±0.3	≤200	30	35.0	25.0	0.30	0.56	Brass
FT-35G-3.0A1	3.00±0.15	≤150	36	35.0	25.0	0.30	0.52	Steel
FT-35G-3.3A1	3.30±0.15	≤150	28	35.0	25.0	0.30	0.58	Steel
FT-38T-2.8A1	2.8±0.2	≤300	32	38.0	25.0	0.47	0.73	Brass
FT-39T-2.4A1	2.4±0.25	≤400	32	39.0	25.0	0.40	0.66	Brass
FT-39T-2.65A1	2.65±0.25	≤400	32	39.0	25.0	0.47	0.73	Brass

Model NO	Resonant Frequency (kHz)	Resonant Impedance (Ω)	Capacity ±30%(nF)	Dimensions(mm)				Plate Material
				D	d	t	T
FT-43T-2.4A1	2.4±0.3	≤300	66	43.0	25.0	0.10	0.23	Brass
FT-45T-4.3A1	4.3±0.3	≤400	33	43.0	25.0	0.25	0.50	Brass
FT-50T-2.9A1	2.9±0.3	≤300	38	50.0	25.0	0.20	0.44	Brass
FT-20T-3.5B1	3.5±0.3	≤400	22	20.0	15.0	0.10	0.22	Brass
FT-27T-2.1B1	2.1±0.3	≤300	34	27.0	20.0	0.13	0.26	Brass
FT-27T-3.5B1	3.5±0.3	≤300	21	27.0	20.0	0.20	0.41	Brass
FT-27T-4.3B1	4.3±0.4	≤300	19	27.0	20.0	0.26	0.50	Brass
FT-27G-3.1B1	3.1±0.3	≤300	27	27.0	20.0	0.15	0.31	Steel
FT-27G-4.1B1	4.1±0.3	≤200	21	27.0	20.0	0.20	0.41	Steel
FT-35G-3.0B1	3.0±0.15	≤150	31	35.0	25.0	0.30	0.52	Steel

Model NO	Resonant Frequency (kHz)	Resonant Impedance (Ω)	Capacity ±30%(nF)	Dimensions(mm)				Plate Material
				D	d	t	T
FT-35G-3.3B1	3.3±0.15	≤150	24	35.0	25.0	0.30	0.58	Steel
FT-13T-10C2	10±1.0	≤50	26	13.0	12.5	0.17	0.47	Brass
FT-18T-9A2	9±1.0	≤100	30	18.0	17.7	0.10	0.54	Brass
FT-21.5T-4A2	4.0±0.4	≤100	90	21.5	21.0	0.10	0.35	Brass
FT-21.5T-4.7A2	4.7±0.4	≤100	110	21.5	21.0	0.13	0.40	Brass
FT-23.5T-4.0A2	4.0±0.4	≤100	160	23.5	23.2	0.14	0.40	Brass
FT-27T-2.7A2	2.7±0.3	≤100	140	27.0	25.0	0.10	0.36	Brass
FT-31T-2.4A2	2.4±0.3	≤100	130	31.0	25.0	0.10	0.35	Brass
FT-31.8T-2.4A2	2.4±0.3	≤70	180	31.8	31.0	0.10	0.47	Brass
FT-31.8T-2.4A2	2.4±0.3	≤70	260	31.8	31.0	0.10	0.47	Brass

Model NO	Resonant Frequency (kHz)	Resonant Impedance (Ω)	Capacity ±30%(nF)	Dimensions(mm)				Plate Material
				D	d	t	T
FT-31.8T-2.7A2	2.7±0.3	≤70	140	31.8	31.0	0.10	0.52	Brass
FT-31.8T-3.2A2	3.2±0.3	≤70	140	31.8	31.0	0.10	0.57	Brass
FT-35T-1.6A2	1.6±0.3	≤1500	140	35.0	25.0	0.10	0.36	Brass