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Introduction
Specifications
Environmental
Performance curves
Schematics
Physical characteristics
Tape & Reel
Soldering/Washing

WB Wideband RF Transformers

We will continue to manufacture and support the WB series indefinitely. However, for new designs, consider the SWB, which is a drop-in replacement as an alternative to this series.

Surface mount and through hole versions
500 V interwinding isolation, 1/4 Watt RF input power
250 mA max current rating.
For a smaller package size, see our PWB Series

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Part number

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Count	Unit price
1	$4.34
100	$3.96
250	$3.29
500	$2.63
1000	$2.10
2500	$1.69
5000	$1.35

For high volume or non-stock items, request a quote.

Termination

L = Matte tin over nickel

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Specifications

Electrical specifications at 25°C. Measurements are referenced to 50 Ohms.

Through hole

Part number 1 (Hover for schematics)	L min per winding (µH) 2		DCR max (Ω)		Imp. ratio pri:sec 3	Current rating (mA)	Bandwidth (MHz)	Isolation Voltage (Vrms)	Schematic
Part number 1 (Hover for schematics)	Pri	Sec	Pri	Sec	Imp. ratio pri:sec 3	Current rating (mA)	Bandwidth (MHz)	Isolation Voltage (Vrms)	Schematic
WB1010-1-PCL	95	95	0.200	0.200	1 : 1	250	0.04 — 175	500	A
WB1010-PCL	780	780	0.320	0.320	1 : 1	250	0.005 — 100	500	A
WB1015-PCL	80	51	0.145	0.130	1.5 : 1	250	0.1 — 150	500	A
WB1040-PCL	95	25	0.160	0.115	4 : 1	250	0.2 — 300	500	A
WB2010-1-PCL	95	95	0.200	0.200	1 : 1	250	0.04 — 175	500	B
WB2010-PCL	780	780	0.320	0.320	1 : 1	250	0.005 — 100	500	B
WB2040-PCL	95	25	0.160	0.115	4 : 1	250	0.2 — 300	500	B
WB3010-1-PCL	95	95	0.200	0.200	1 : 1	250	0.04 — 175	500	C
WB3010-PCL	780	780	0.320	0.320	1 : 1	250	0.005 — 100	500	C
WB3015-PCL	80	51	0.145	0.130	1.5 : 1	250	0.1 — 150	500	C
WB3040-PCL	95	25	0.160	0.115	4 : 1	250	0.2 — 300	500	C

Surface mount

Part number 1 (Hover for schematics)	L min per winding (µH) 2		DCR max (Ω)		Imp. ratio pri:sec 3	Current rating (mA)	Bandwidth (MHz)	Isolation Voltage (Vrms)	Schematic
Part number 1 (Hover for schematics)	Pri	Sec	Pri	Sec	Imp. ratio pri:sec 3	Current rating (mA)	Bandwidth (MHz)	Isolation Voltage (Vrms)	Schematic
WB1010-1-SML_	95	95	0.200	0.200	1 : 1	250	0.04 — 175	500	A
WB1010-SML_	780	780	0.320	0.320	1 : 1	250	0.005 — 100	500	A
WB1015-SML_	80	51	0.145	0.130	1.5 : 1	250	0.1 — 150	500	A
WB1040-SML_	95	25	0.160	0.115	4 : 1	250	0.2 — 300	500	A
WB2010-1-SML_	95	95	0.200	0.200	1 : 1	250	0.04 — 175	500	B
WB2010-SML_	780	780	0.320	0.320	1 : 1	250	0.005 — 100	500	B
WB2040-SML_	95	25	0.160	0.115	4 : 1	250	0.2 — 300	500	B
WB3010-1-SML_	95	95	0.200	0.200	1 : 1	250	0.04 — 175	500	C
WB3010-SML_	780	780	0.320	0.320	1 : 1	250	0.005 — 100	500	C
WB3015-SML_	80	51	0.145	0.130	1.5 : 1	250	0.1 — 150	500	C
WB3040-SML_	95	25	0.160	0.115	4 : 1	250	0.2 — 300	500	C

Notes

When ordering surface mount parts, please specify a packaging code: e.g. WB3040-SMLD
Through-hole parts are packaged 70 per tube and do not require a packaging code when ordering.
Inductance tested at 100 kHz, 0.1 Vrms, 0 Adc
Impedance ratio is for the full primary winding to the full secondary winding.

Termination:

RoHS-compliant. Matte tin over nickel over phos bronze. Other terminations available at additional cost.

Packaging:

D = 13″ machine ready reel. EIA-481 embossed plastic tape (500 parts per full reel). Quantities less than full reel available: in tape (not machine ready) or with leader and trailer ($25 charge).
B = Less than full reel. In an effort to simplify our part numbering system, Coilcraft is eliminating the need for multiple packaging codes. When ordering, simply change the last letter of your part number from B to D.

Environmental

Environmental:

RoHS compliant

Ambient temperature range:

–40°C to +85°C

Storage temperature range:

Component: –40°C to +85°C
Packaging: –40°C to +80°C

Maximum part temperature:

+85°C (ambient + temp rise)

Failures in Time (FIT) / Mean Time Between Failures (MTBF):

See FIT/MTBF Calculations

Performance curves

Attenuation vs Current

Frequency Response

Schematics

A	B	C

Physical characteristics

Tape and Reel specification

Parts per reel	Reel dimensions (mm)					Tape dimensions (mm)						Orientation
13" (330 mm)	A	B	C	D	E	W	P	Po	P1	H	T
500 (SMT parts)*	330	100	13	30,4	24,4	24	20	4	2	6,6	0,45

* Through-hole parts are packaged 70 per tube.

General specification

Core Material:

Ferrite

Weight:

0.37 – 0.39 g

Packaging:

(SM version): 500 per 13″ reel; Plastic tape: 24 mm wide, 0.45 mm thick, 20 mm pocket spacing, 6.6 mm pocket depth; (TH version): 70 per tube

Soldering/Washing

Moisture Sensitivity Level (MSL):

1 (unlimited floor life at <30°C / 85% relative humidity)

Resistance to soldering heat:

Max three 40 second reflows at +260°C, parts cooled to room temperature between cycles

Refer to Soldering Coilcraft Components before soldering.

PCB Washing:

Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. More info

WB Wideband RF Transformers