LV3.6.3 - 3.6.3 LV Surge Protective Device Components Application Guide WG

Michael J Maytum

The C62.42 guide series covers surge protective components (SPCs) used in power and telecom surge protective devices (SPDs) and equipment ports. This part on Metal-Oxide Varistor (MOV) technology SPCs covers: - Component construction - Characteristics - Ratings - Application examples

Superseded by IEEE Std C62.42-2005 This guide establishes test methods for the evaluation of ESD withstand capability for electronic equipment subassemblies. It includes information about test conditions, test equipment, and test procedures for ESD tests of printed circuit boards and other subassemblies.

Assistance in selecting the most appropriate type of low-voltage component surge-protective device (gas tube, air gap, metal-oxide varistor, or avalanche junction semiconductor) for a particular application is provided. Evaluation of the characteristics of each device to meet specific service requirements is also given.

Covered in the IEEE C62.42 guide series are surge protective components (SPCs) used in power and telecom surge protective devices (SPDs) and equipment ports. Covered in this standard on gas discharge tube (GDT) technology SPCs are the following: component construction, characteristics, ratings, and application examples. The application examples are given in two informative annexes covering: basic circuits and protection circuits specific to communications, local area networks, high frequency feeds, and industrial services.

Surge-protective components (SPCs) used in power and telecom surge-protective devices (SPDs) and equipment ports are covered in the C62.42 guide series. This Overview part covers protective functions, both non-linear and linear; component technologies and characteristics; common circuit designs used in SPDs and equipment ports; and information on the impulse (surge) generators used to test SPCs. Additional parts of C62.42 on specific SPC technologies provide details on component construction, characteristics and ratings, and application examples.

Surge protective components (SPCs) used in power and telecom surge protective devices (SPDs) and equipment ports are covered in the IEEE C62.42? guide series. This part, Part 3 of the series, describes silicon PN-Junction clamping diode SPCs and covers technology variants, including forward biased semiconductor diodes, Zener breakdown semiconductor diodes, avalanche breakdown semiconductor diodes, punch-through semiconductor bipolar junction transistor diodes, and fold-back semiconductor bidirectional transistor diodes, as well as component construction; characteristics; ratings; and application examples.

Surge protective components (SPCs) used in power and telecom surge protective devices (SPDs) and equipment ports are covered in the IEEE C62.42 guide series. Positive temperature coefficient (PTC) thermistor components are covered in this part. These SPCs are operated by self-heating and is automatically reset after the end of the overcurrent condition without the need for manual intervention. The two types of body material, polymer and ceramic, are covered in this guide. These components are referred to as follows: a) polymer positive temperature coefficient (PPTC) thermistors and b) ceramic positive temperature coefficient (CPTC) thermistors. Overview, construction, operation, production, ratings, characteristics, and application examples are topics covered in this guide.

Surge protective components (SPCs) used in power and telecom surge protective devices (SPDs) and equipment ports are covered in the IEEE C62.42 guide series. The following are covered in this part of the series on high-frequency signal isolation-transformer technology SPCs: component construction, characteristics, and ratings.