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Isolation Transformer

RoHS compliant
  • Developed for use with ADI's ADM2482E and ADM2487E RS-485 Transceivers
  • Center tapped primary and secondary

Buy Now:
Count Unit price
1 $4.84
300 $3.88
600 $2.34
1200 $1.83
2400 $1.56
5000 $1.44

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

. in stock, ready to ship today.
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Typical Application

Works with Analog Devices ADM2482E, ADM2487E

Input Voltage Primary voltage Secondary voltage Power 1
5 V 5 V 3.3 V 7.2 W


Electrical specifications at 25°C.

Part number 2
(Hover for schematics)
min (µH) 3
DCR max (Ω) 4 Leakage
max (µH) 5
Turns Ratio Volt-time
product (V-µs) 6
Voltage (Vrms) 7
Pri Sec Pri : Sec
GA3157-AL_ 45.6 0.260 0.310 1.14 1 : 0.88 34.4 2500
  1. Calculated output power based on 150 kHz operating frequency. Power varies depending on application.
  2. When ordering, please specify termination and packaging codes: e.g. GA3157-ALD
  3. Inductance is tested between pins 4 and 3 at 500 kHz, 0.5 Vrms, 0 Adc.
  4. DCR is for each half of the primary and secondary.
  5. Leakage inductance is for the primary with both windings connected in series and with the secondary windings shorted.
  6. Based on Bsat of the core at 25°C and number of turns on winding 4-3.
  7. 2500 Vrms primary to secondary isolation.


  • L = RoHS compliant tin-silver over tin over nickel over phos bronze.
  • = RoHS tin-silver-copper (95.5/4/0.5). (Special order, added cost)
  • S = non-RoHS tin-lead (63/37). (Special order, added cost)


  • D = 13″ machine ready reel. EIA-481 embossed plastic tape (600 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.
RoHS compliant
Ambient temperature range:
–40°C to +125°C
Storage temperature range:
Component: –40°C to +125°C.
Tape and reel packaging: –40°C to +80°C
Failures in Time (FIT) / Mean Time Between Failures (MTBF):



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 part_or_c.gif
600 330 100 13 30,4 24,4 24 16 4 2 6,1 0,37

General specification

Core Material:
1.0 g
600 per 13″ reel; Plastic tape: 24 mm wide, 0.37 mm thick, 16 mm pocket spacing, 6.1 mm pocket depth


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.

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