STMicro surge protection devices qualified to automotive standards ...

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STMicroelectronics (ST) is offering what the firm says are the first surge protection devices certified to the automotive industry?s preferred specifications. By saving the time otherwise needed for independent certification, ST?s SM4TY-SM30TY Transil series of miniature surge-protection devices can help vehicle electronics manufacturers deliver safer, more reliable systems more quickly and at more competitive prices.

The new transient voltage suppressors (TVS) are certified to pulse specifications used by the automotive industry. They are also qualified to the AEC-Q101 automotive reliability test standard for discrete semiconductors, and have a full Automotive-Grade Approval Certificate (AGAC). Designers can save the time they spend researching for equivalence between industrial and automotive standards, and then re-certifying each new subsystem design independently. As a result, according to ST, new innovations are able to reach the market quickly and cost efficiently.

Surge protection prevents unwanted voltage pulses in the vehicle wiring from damaging sensitive subsystems such as safety systems, control modules and infotainment equipment. Pulses can be caused by events such as electrostatic discharges (ESD) from occupants, turn-on/off of subsystems such as motor drives or climate control, or load dumps when a significant load such as the battery is suddenly disconnected. Historically, designers have chosen from devices certified to industrial standards that specify pulse shapes unrepresentative of those expected in road vehicles.

Devices in ST?s SM4TY-SM30TY series are housed in miniature surface-mount power packages occupying from 12.8mm2 to 46mm2 of pc-board space, capable of handling from 400W to 3000W of power contained in pulses and ESD transients present on the vehicle wiring.

ST?s automotive Transil protection devices are:

????????????? Tested and certified using ISO 7637 specifications for electrical transients

????????????? Tested and certified using ISO 10605 specifications for ESD strike

????????????? AEC-Q101 certified

????????????? Available in unidirectional or bidirectional configuration

????????????? SM4TY: SMA package, 2.55 x 5.05 mm, 400 W

????????????? SMA6TY: SMA package, 2.55 x 5.05 mm, 600 W

????????????? SM6TY: SMB package, 3.60 x 5.35 mm, 600 W

????????????? SM15TY: SMC package, 5.90 x 7.95 mm, 1500 W

????????????? SM30TY: SMC package, 5.90 x 7.95 mm, 3000 W

ST automotive-(AGAC) Transil protection devices are in mass production now, in SMA, SMB or SMC surface-mount packages, at prices ranging from $0.118 to $0.528 for unidirectional devices or $0.129 to $0.558 for bidirectional devices. Alternative pricing options for large quantities may be available on request.

Other posts you may be interested in reading:

1. Floating surge stopper provides unlimited overvoltage protection
2. Maxim MAX16914/15 automotive protection devices offer minimal forward-voltage drop
3. Protecting automotive power rails against overvoltage and reverse polarity battery hazards

Source: http://johndayautomotivelectronics.com/?p=11051

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