Audio Coupling
Miniature Encapsulated Transformer
Web: www.TriadMagnetics.com
Phone 951-277-0757
Fax 951-277-2757
460 Harley Knox Blvd.
Perris, California 92571
Publish Date: September 22, 2017
MET-28-T
Description:
Triad’s high reliability audio transformers provide the durability and precision required
in today’s demanding designs. These transformers are available for a wide variety of
applications.
Electrical Specifications (@20C)
Power
level
(mW)
Matching Impedance
Max. mA DC
Unbalance
in Primary
DC Resistance (Ω)
Overall
Turns
Ratio
Primary
Secondary
Primary
Secondary
50
1KΩ
50Ω
3.0
110
8
4.47:1.0
Operating Temperature: -20C° to 85C°
Storage Temperature: -55C° to 105C°
Frequency Response: + 2.0 dB, at 300 Hz to 100K Hz (1 KHz Ref.)
Longitudinal Balance: 60dB Min @ 1 KHz
*Max power at 300Hz
Pri-Sec Hipot test (Pri-Sec): 1000 VRMS for 1 sec.
Construction:
Plug-in terminals are precision spaced to provide fixed mounting centers.
Epoxy molded case includes a .020” recess for ease of solder inspection.
Leads are Tin plated 0.020” in diameter.
RoHS Compliance: Meets the requirements of 2011/65/EU, known as the RoHS initiative.
*Upon printing, this document is considered “uncontrolled”. Please contact Triad Magnetics
website for the most current version. For soldering and washing information please see
http://www.triadmagnetics.com/faq.html
1K OHM
1
2
4
3
50 OHM
50 MW
PRI Z
SEC Z
.200
.100
.750
MIN.
.020
.465
MAX.
.310
MAX.
MAX.
1
2
3
MET-28-T
4
50mW
.200
.300
TAB, AT PIN #1
3mADC
1-2 1KΩ
3-4 50Ω
.410
