Site Settings

Language settings
Currency settings
Video Library
Cx Family Common Mode Chokes
0402CT Low Profile Chip Inductors
XAL7050 High-inductance Shielded Power Inductors
XGL4020 Ultra-low DCR Power Inductors

Isolation Transformers

RoHS compliant AEC-Q flag

Great News! More Choices!
See UA825x for a significantly smaller and lower profile solution (10 × 6.8 × 4.3 mm).

For increased creepage and clearance specification along with improved isolation rating, see ZA9801 (17.07 x 10.3 x 5.97 mm).

  • Optimized for Texas Instruments SN6501, ISO1176T/35T/3086T and Analog Devices ADM2482E/2485/2487E RS-485 Transceivers
  • Center tapped primary and secondary
  • AEC-Q200 Grade 1 (−40°C to +125°C)
  • Contact us for 8 mm creepage and clearance options.

Buy Now:
Count Unit price
1 $3.20
300 $2.73
600 $2.38
1200 $1.86
2400 $1.59
5000 $1.46

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

. in stock, ready to ship today.
Request a Sample:

Typical Application

Works with Texas Instruments SN6501, ISO1176T/35T/3086T

Part number Primary voltage Secondary voltage Power 1 Fsw
DA2304-AL_ 3.3 V 6 V 7.2 W 500 kHz
DA2303-AL_ 5 V 6 V 7.2 W 500 kHz


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
DA2304-AL_ 17.8 0.086 0.232 0.43 1 : 2.2 21.5 2500
DA2303-AL_ 45.6 0.130 0.260 1.00 1 : 1.5 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. DA2303-ALD
  3. Inductance is tested between pins 4 and 3 at 500 kHz, 0.5 Vrms, 0 Adc.
  4. DCR is per winding at 25°C. For other operating temperatures, use this use this DCR at Temperature calculator.
  5. Leakage inductance is for the primary with both windings connected in series and with the secondary windings shorted.
  6. Volt-time product is for the primary, between pins 4 and 1 with pins 2 and 3 connected.
  7. 2500 Vrms, one minute 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)
  • S = non-RoHS tin-lead (63/37). (Special order)


  • 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:
0.94 – 1.0 g
600/13″ 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:
Three reflows at >217°C for 90 seconds (+260°C ±:5°C for 20 – 40 seconds), allowing parts to cool to room temperature between.
Refer to Soldering Coilcraft Components before soldering.
PCB Washing:
Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. More info.

Related product series