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News Release

UL60950-1 Recognized Surface Mount Transformer
Delivers Superior Telecom Performance

Ideal for Modems, Laptops, Telecommunications, Instrumentation

SM501-1 Telecom Transformer

ROMOLAND, CA–November 17, 2009—Engineers in search of a small surface mount transformer supporting telecom device data and speech applications will find the SM501-1 Telecom Transformer from Datatronic Distribution, Inc., delivers performance, quality and reliability while meeting stringent electrical industry standards.

The surface mount SM501-1 Transformer is suitable for a wide range of BS6305 Impedance Class A non-speech data and Class B voice applications in telecom equipment, laptops, modems, instrumentation and more.  Its dielectric strength is tested to 4600 Vrms and meets various international safety standards including UL60950-1.

The SM501-1 Transformer provides space-efficient isolation between sensitive electronics and telephone lines. Its high dielectric strength helps safeguard equipment users by protecting them from electrical shock.

The SM501-1 Transformer’s symmetrical design means that there is no real primary or secondary winding. Key specifications include: impedance at 600 ohms (both primary/secondary), turns ratio is 1:1, 3.8 H shunt inductance and 6 to 7 mH leakage inductance at 1 kHz.

The surface mount SM501-1 Transformer’s comes in a 12.5 mm (0.50 inch) by 9.6 mm (0.38 inch) rectangular package. The seated height is 7.36 mm (0.29 inch). Recommended lead spacing is 0.60 mm (0.024 inch). Lead terminal finish is RoHS compliant; solder meets J-STD-020D. Its superior performance in a small package makes it ideal for high density circuit designs.

The sealed SM501-1 is vacuum encapsulated to withstand high temperature soldering and operating temperature environments from –20ºC to +85ºC and a storage range of -40ºC to +85ºC.  The SM501-1 comes in tape-and-reel packaging for auto insertion equipment.

In 10,000 piece quantity, the SM501-1 is available beginning at $.59 each. Lead-time is stock to six weeks. Volume OEM pricing is available upon request.

Datatronic manufactures transformers, inductors, ADSL transformers, LAN filter modules and many other magnetic devices in standard off-the-shelf as well as custom packages. For further information, contact Datatronic Distribution Inc., 28151 Highway 74, Romoland, CA 92585, or telephone toll free 1-888-889-5391, or 951-928-7700 or fax 951-928-7701. Email Datatronic at or visit the website at

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