TYPE
2
Balun Transformers for Surface Mounting
B4F
B5FL
Meeting Your Needs
TYPE B4F: Surface Mount
TYPE B5FL: Surface Mount
B4F
5.5Max.
2.7
B5FL
3.6Max.
3.8
2
3.8
6.9Max.
3.2Max.
(Unit: mm)
(Unit: mm)
Features
Applications
• Double balance mixers, broad-band transformers,
impedance transformers, etc.
• Pair wire coil for high stability.
• Base pin terminal treated, allowing mounting
‘as is’ on a PCB.
STANDARD TRANSFORMERS SELECTION GUIDE
TYPE B5FL
TYPE B4F
Operating
Frequency
Range
Operating
Frequency
Range
TOKO
Part
Number
of Turns
Insertion
Loss
(dB)
TOKO
Part
Number
of Turns
Insertion
Loss
(dB)
Fig.
Fig.
Number per Winding
(MHz)
Number per Winding
(MHz)
Double Balanced Mixer
Double Balanced Mixer
616DB-1003
616DB-1004
616DB-1007
616DB-1008
2
3
4
5
30~850
3
3
3
3
1
1
1
1
617DB-1007
617DB-1009
617DB-1006
617DB-1010
617DB-1018
2
3
3
4
5
25~2000
6~2000
3
3
3
3
3
1
1
1
1
1
6.5~1000
3.5~1600
2.5~1500
150~2300
3.5~2000
2~2000
Frequency Mixer
616PT-1027
616PT-1028
616PT-1029
616PT-1030
616PT-1037
616PT-1038
616PT-1039
616PT-1040
1
2
3
4
1
2
3
4
—
3
3
3
3
3
3
3
3
2
2
2
2
2
2
2
2
Frequency Mixer
617PT-1025
617PT-1019
617PT-1026
8~550
3.5~500
2~370
—
1
2
3
—
8~750
3.5~700
2
2
2
3
3
Balun Transformer
500~850
240~500
85~380
617DB-1021 11/
2
20~750
3
3
3
3
3
3
3
3
617DB-1022 21/
617DB-1023 31/
617DB-1024 41/
2
4.5~3300
2.3~2700
1.5~2400
2
Balun Transformer
2
616DB-1048 11/
2
5.5~850
3
3
3
3
3
3
3
3
3
3
Distributor
616DB-1049 21/
616DB-1050 31/
616DB-1051 41/
616DB-1078 51/
2
2.5~2000
1.2~1700
0.8~1400
0.6~1300
IN to OUT-1,2
4.5dB max.
617DS-1079
2
3
1300~1700
800~1000
5
5
2
2
IN to OUT-2
(ISOLATION)
15dB min.
2
617DS-1076
Balun Transformer
616DB-1053 11/
616DB-1017 21/
616DB-1054 31/
2
160~2200
55~1700
30~1400
3
3
3
4
4
4
2
2
Pin Connections
4
6
4
6
3
2
1
3
2
1
3
2
1
3
2
1
4
6
4
3
2
1
4
6
6
Double balanced
Fig. 1
Mixer transformer
Fig. 2
Balun transformer
Fig. 3
Balun transformer
Fig. 4
Distributor
Fig. 5
R-LOG0402A
1.800.PIK.TOKO
www.tokoam.com
1.847.297.0070