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WBC Series
SMT Mini Wideband Transformers

Tapped or untapped configurations
250 mA max current rating
300 Vrms interwinding isolation
1/4 Watt RF input power rating
Custom versions available
Typical applications are as impedance or isolation transformer
Can also be used for balanced to unbalanced (balun) conversion
RoHS compliant. 260°C compatible. Tin-silver-copper over silver-palladium-platinum-glass frit terminations
Samples of all values are available in Coilcraft Designer's Kit C393

Photo Pricing Materials declaration PDF data sheet

SPECIFICATIONS

Frequency Response Dimensions Tape and reel specifications

A	B	C


WBC1-1L_	A	1 : 1	0.400–600	0.40	10	120	10	120	—	Brown
WBC1-1TL_	B	1 : 1	0.250–750	0.58	11	75	11	75	36	Brown
WBC2-1TL_	B	1 : 2	0.200–500	0.50	10	120	20	150	8.5	Red
WBC3-1TL_	B	1 : 3	0.300–900	0.60	9	100	27	150	8.5	Orange
WBC4-1TL_	B	1 : 4	0.250–750	1.0	12	55	48	120	30	Yellow
WBC4-14L_	B	1 : 4	1.500–1200	2.0	2	50	8	100	15	Green
WBC4-1WL_	B	1 : 4	0.500–1000	0.90	5	60	20	120	10	White
WBC4-6TL_	B	1 : 4	0.300–700	0.30	9	80	36	200	7.5	Blue
WBC8-1L_	B	1 : 8	0.150–600	0.60	25	120	200	310	17	Gray
WBC9-1L_	B	1 : 9	0.300–500	0.54	9	80	81	230	5	White
WBC16-1TL_	B	1 : 16	0.600–300	0.80	5	60	80	230	5	Violet
WBC4-4L_	C	1 : 4	0.250–800	1.0	12	60	48	120	30	Yellow

1	When ordering, please specify termination and packaging codes: e.g. WBC16-1TLC
	Termination:	L = RoHS compliant tin-silver-copper (95.5/4/0.5) over silver-palladium-platinum-glass frit Special order, added cost: S = non-RoHS tin-lead (63/37).
	Packaging:	C = 7" machine-ready reel EIA-481 embossed plastic tape (750 parts per full reel). B = Less than full reel In tape but not machine-ready. To have a leader and trailer added ($25 charge), use code letter C instead. D = 13" reel, machine-ready EIA-481 embossed plastic tape. Factory order only, not stocked (3000 parts per full reel).

2 Impedance ratio is for the full primary winding to the full secondary winding.

3 Inductance measured at 100 kHz, 0.1 V, 0 Adc on an Agilent/ HP 4192 or equivalent.

4 DCR measured on a micro-ohmmeter.

5 DC imbalance is the maximum difference in current measured at pins 1 and 3 with the source at pin 2. Inductance drop is 15% at maximum imbalance.

6 Ambient temperature range: –40°C to +85°C

7 Storage temperature range: Component: –40°C to +85°C
Packaging: –55°C to +80°C

8 Resistance to soldering heat: Three reflows at >217°C for 90 seconds (+260°C ±5°C for 20 – 40 seconds), allowing parts to cool to room temperature between.

9 Electrical specifications at 25°C.

Refer to Soldering Coilcraft Components before soldering.

2	Impedance ratio is for the full primary winding to the full secondary winding.
3	Inductance measured at 100 kHz, 0.1 V, 0 Adc on an Agilent/ HP 4192 or equivalent.
4	DCR measured on a micro-ohmmeter.
5	DC imbalance is the maximum difference in current measured at pins 1 and 3 with the source at pin 2. Inductance drop is 15% at maximum imbalance.
6	Ambient temperature range:	–40°C to +85°C
7	Storage temperature range:	Component: –40°C to +85°C Packaging: –55°C to +80°C
8	Resistance to soldering heat: Three reflows at >217°C for 90 seconds (+260°C ±5°C for 20 – 40 seconds), allowing parts to cool to room temperature between.
9	Electrical specifications at 25°C.
Refer to Soldering Coilcraft Components before soldering.

WBC Series SMT Mini Wideband Transformers

SPECIFICATIONS