AU-100 is a two-channel audio isolator in a desktop housing. Each channel passes through its own 600:600 permalloy transformer in a sealed shielding can, so the audio crosses while the ground connection between the two pieces of equipment does not. Each side brings out five interface types: balanced XLR, 6.35 mm TRS, gold-plated RCA and 3.5 mm AUX, with full balanced and unbalanced conversion. A one-touch LIFT/GND switch on the input panel opens the ground when a loop still hums. Stated performance is a flat 20 Hz to 20 kHz response within ±0.2 dB, THD below 0.001 % at 1 kHz and common mode rejection above 90 dB at 60 Hz. The enclosure is extruded aluminium alloy and the PCB is a double-layer shielded design.

ZXY-EI25 is a flying-lead audio isolation transformer built on an EI25 laminated core. Its two windings are isolated and wound to a 1:4 turns ratio. At 1 kHz and 0.3 V the primary measures 56 mH min and the secondary 800 mH min, and DC resistance at 25 °C is 1.6 Ω on the primary and 17 Ω on the secondary, ±15 %. The part covers 50 Hz to 20 kHz and is designed for low distortion across that band. Because the windings are separated it breaks the ground path between equipment, which removes AC hum from system grounding, and it reduces external interference on balanced and unbalanced lines. Flying leads with tinned ends suit a wide range of wiring layouts; customized designs are available. Supplied by ZXY, Shenzhen Zhixiangyuan Electronics Co., Ltd.

ZXY-ED8 is a miniature shielded permalloy audio isolation transformer for low-power audio and communication circuits, rated 0.1 W to 5 W. A permalloy core gives low loss and efficiency of 92 % or higher; the metal shielding shell suppresses EMI/RFI and keeps dust and moisture out of the winding. Standard ratios of 600:600 and 10K:600 cover the usual matching jobs, and custom ratios are wound to order. The V-0 flame-retardant bobbin carries a 130 °C insulation rating, the part withstands 2.0 kV AC for one minute between windings, and insulation resistance is 100 MΩ or more at 500 VDC. SMD solder pads suit automatic SMT assembly. Supplied by ZXY, Shenzhen Zhixiangyuan Electronics Co., Ltd.

ZXY-DU18 is a wideband audio isolation transformer in a sealed permalloy alloy housing with DIP through-hole mounting. Two winding variants are available, 1+1:1+1 and 1+1:3.5+3.5. Frequency response is ±0.5 dB from 10 Hz to 100 kHz at 1 % THD against a −6 dB 1 kHz reference, the maximum 50 Hz input level is +13 dBu, and the hi-pot rating is 1,250 V tested at 1 mA for 60 s. The part couples voice and data signals while breaking the ground path between equipment. Outline 38.5 mm by 24.5 mm, 22.0 mm high, on 8 pins in two rows of four at 5.0 mm pitch.

ZXY-B2511 is a cased permalloy audio isolation transformer with two separate 1:1 windings, built for low-frequency signal paths. Both windings measure 110 Ω ±10 % DC resistance and 1.0 H minimum inductance at 1 kHz / 0.3 V, and the turns ratio is held to 1:1 ±2 %. Frequency response stays within ±0.12 dB from 300 Hz to 4 kHz referred to 1 kHz. Insulation resistance is 100 MΩ min at 200 VDC with a 1,250 VDC hi-pot at 1 mA for 60 s between windings. Body 12.0 mm max by 9.3 mm max, 5.8 mm max high, on four SMD gull-wing pins with the PCB land layout defined in the specification.

ZXY-B2111 is a 1:1 audio isolation transformer on an ED8×11 nickel-steel lamination core, supplied as a fully potted SMD body of 13.8 mm by 10.6 mm and 8.0 mm high. Both windings are 520 turns of 2UEW-F Ø0.04 mm enamel wire, wound on a thickened double-section bobbin with 0.15 mm laminations interleaved and fully stacked, which is what holds the turns ratio to ±1 %. DC resistance is 115 Ω ±10 % on pins 1-3 and on pins 4-6; inductance 1.4 H min at 1 kHz and 0.25 V, parallel resistance 7,500 Ω min. In a 600 Ω system insertion loss is 2 dB max at 2 kHz and return loss 24 dB min from 200 Hz to 4 kHz, with response inside ±0.25 dB. Insulation resistance 100 MΩ min at 200 VDC, hi-pot 4,600 VDC at 1 mA for 60 s.

ZXY-G14 is a compact PCB-mount audio transformer on a G14 pot core in XP95 ferrite, one core set per unit, wound with 0.12 mm self-bonding enamel wire and bonded with 316 anaerobic adhesive. The main winding on pins 2-3 measures at least 420 mH at 10 kHz and 1 V, with a DC resistance of 19 Ω ±10% at 25 °C. Three 0.7 mm pins on a 3.5 mm pitch with 7.0 mm row spacing drop into a standard footprint, and a central M2 x 16 stud with an M2 x 2 nut gives a chassis or bracket fixing. Body 16.3 mm diameter by 13.8 mm high. Part number G2610. Winding, inductance value, base and pin-out are built to your drawing.

ER14.5 is a high-frequency ferrite core transformer for surface-mount power supplies: a NiZn power ferrite core, precision-wound copper windings brought out on terminals 1-3 and 4-6, and an encapsulated case over tin-plated gullwing terminals. The series is declared across 1 Hz to 1 MHz, -45 °C to +125 °C and 30% to 70% relative humidity, with primary voltage from 6 V to 305 V, secondary from 1.8 V to 55 V, DC resistance 2.8 Ω to 82 Ω and 0.02 Ω to 12.8 Ω, and leakage inductance 0.32 µH to 5.8 µH, all at 1 kHz, 0.25 V. Body 15.0 x 12.0 x 7.0 mm maximum. Windings, ratio and footprint are built to the customer's design, so a sample is matched to your schematic rather than chosen from a catalogue.

ZXY2207 is a permalloy audio isolation transformer in a shielded metal can, made in five builds: 600:600 at 1:1 with 6.0 H, 600:600 dual at 1+1 : 1+1 with 14.0 H, 10K:10K at 1:1 with 105 H, 600:10K at 1:4 and 10K:600 at 4:1. All are held to ±2% on ratio and ±15% on DC resistance, isolated to 1250 V AC at 1 mA for 60 s, and rated −40 °C to +85 °C. Six pins on a 4.0 mm grid, footprint 22.0 x 18.3 mm. Data at 25 °C. The windings are tightly coupled on a high-permeability core, so almost all of the flux set up by the primary links the secondary and the coupling coefficient sits close to one. That is what makes the response flat across the band: the bottom of the passband is set by the primary inductance and the top by the leakage inductance. The primary job of the part, though, is the isolation - the two windings share no conductor, so a ground potential difference between two pieces of equipment has no path to travel.

ZXY-CT226A is a precision AC current transformer for PCB mounting: an epoxy-potted body with a Φ5 mm primary bore and two secondary pins, 30 A AC rated input at 50/60 Hz, offered as 1000:1 (GL-CT226A1.0B) with 30 mA AC output or 2000:1 (GL-CT226A2.0B) with 15 mA AC output. Phase error is 5 arc-minutes or better at the stated burden, linearity 0.2% on the 1000:1 build and 0.1% on the 2000:1. Insulation resistance is above 1000 MΩ, the case is UL94-V0, and dielectric withstand is 4 kV at 50 Hz for 1 minute over −40 °C to +70 °C. The primary is the cable or busbar that passes through the bore, not a winding of the part, so the part reads whatever current the conductor carries without being connected into that circuit at all. What comes out of the two pins is a scaled copy, small enough for a metering or protection input to accept directly. That is what makes it usable on a mains conductor: the measuring circuit never touches it.

ZXY-ED12.6-20H is an SMD audio isolation transformer on a permalloy core: a sealed core in a high-gloss tape wrap, a plastic bobbin with the primary on pins 1-5 and the secondary on pins 6-10, and ten formed SMD pins, five to a side. 100 Hz to 20 kHz, turns ratio 1:1 within ±2%, primary inductance 20 H minimum at 1 kHz and 0.3 V, dielectric withstand 1250 V at 1 mA / 60 s. Outline 10.0 mm high, 17.8 mm long and 13.3 mm wide. Data at 25 °C. It sits between two stages of a signal path that must not share a conductor. The isolation keeps a fault or a burn-out on one side away from the output stage on the other, removes the AC mains-frequency interference that travels along the ground, and breaks the common-ground loop that produces hum. Being surface mount, it is placed by the same process as the rest of the board, which is why the 20 H winding is wound on a part this small.

EL14 is a horizontal audio isolation transformer for through-hole PCB mounting: a precision ferrite core, a precision coil wound primary 1-2 and secondary 4-3 under yellow tape insulation, and four pins in two rows underneath the body. Two variants are listed under the model, EI1401 and EI1402, both 1:1 and both rated 1500 V at 1 mA / 60 s. Operating range 300 Hz to 3.4 kHz. Body 16 mm maximum length, 8.5 mm high, pin rows 12 mm apart. Data at 25 °C. The part sits between two circuits that must not share a conductor: it couples the voice or data signal while breaking the earth path, which removes the hum a system picks up when it is grounded at more than one point, and it keeps a fault on one side away from the output stage on the other. Balanced and unbalanced runs both benefit, which is why the same part appears in telephone, biomedical and induction-speaker equipment.