P4SMAJ28A datasheet, PDF - EEWORLD Datasheet

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P4SMAJ28A: DescriptionTrans Voltage Suppressor Diode, 400W, 28V V(RWM), Unidirectional, 1 Element, Silicon, DO-214AC, PLASTIC PACKAGE-2; CategoryDiscrete semiconductor diode; File Size1MB，60 Pages; ManufacturerWorld Produts Inc.; Websitehttp://www.worldproducts.com

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P4SMAJ28A Overview

Trans Voltage Suppressor Diode, 400W, 28V V(RWM), Unidirectional, 1 Element, Silicon, DO-214AC, PLASTIC PACKAGE-2

P4SMAJ28A Parametric

Parameter Name	Attribute value
Is it lead-free?	Contains lead
Is it Rohs certified?	incompatible
Maker	World Produts Inc.
Parts packaging code	DO-214AC
package instruction	R-PDSO-C2
Contacts	2
Reach Compliance Code	unknown
ECCN code	EAR99
Other features	UL RECOGNIZED
Maximum breakdown voltage	34.4 V
Minimum breakdown voltage	31.1 V
Maximum clamping voltage	45.4 V
Configuration	SINGLE
Diode component materials	SILICON
Diode type	TRANS VOLTAGE SUPPRESSOR DIODE
JEDEC-95 code	DO-214AC
JESD-30 code	R-PDSO-C2
JESD-609 code	e0
Maximum non-repetitive peak reverse power dissipation	400 W
Number of components	1
Number of terminals	2
Package body material	PLASTIC/EPOXY
Package shape	RECTANGULAR
Package form	SMALL OUTLINE
Peak Reflow Temperature (Celsius)	NOT SPECIFIED
polarity	UNIDIRECTIONAL
Certification status	Not Qualified
Maximum repetitive peak reverse voltage	28 V
surface mount	YES
technology	AVALANCHE
Terminal surface	TIN LEAD
Terminal form	C BEND
Terminal location	DUAL
Maximum time at peak reflow temperature	NOT SPECIFIED

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World Products Inc. 19654 8th St. East, Sonoma, CA, USA, 95476 . . Phone: (707) 996-5201 . . Fax: (707) 996-3380

Transient Voltage Suppression Diodes

General Information

TVS Diode Technology

World Products Transient Voltage Suppression (TVS) Diodes are silicon avalanche devices designed, manufactured,

specified and tested according to voltage suppression applications.

These devices, with their fast response and low clamping characteristics, protect all MOS technology based devices,

hybrids, and other voltage sensitive components. The low clamping factor and pico-second response time of World

Products TVS Diodes clamps transient pulses early and maintains them at an acceptable level for their entire duration. In

other overvoltage protection devices, response times are delayed by 24nS to 2µs allowing transients to reach dangerous

levels. World Products TVS Diodes are designed to meet a 1.30 maximum clamping factor at their rated peak impulse

current. This can be compared to clamping factors of 2 to 5 found in other protection devices.

TVS Diode Applications

TVS Diodes are the optimum choice in protecting computer or data processor circuits and power supplies, airframe

avionics and controls, numerically controlled machines, telecom circuits, and many other applications. These devices are

designed to protect against transient voltages generated by lightning, electro-static discharge (ESD), and inductive

switching.

Selecting the Correct Part Type

The following guidelines should be observed in selecting the correct diode:

TVS Parameters

1. Stand-off Voltage (Vwm) >=

2. Peak Pulse Current (Ippm) >=

3. Clamping Voltage

(Vc)

Application Parameters

Operating Voltage

(Vop)

Source Transient Current (Is)

Voltage Withstand

(Vws)

1. If the stand-off voltage is less than the operating voltage of the application, the diode will continually clamp the

circuit voltage.

2. The Peak Pulse Current (Ippm) is the maximum current the TVS can handle. The source transient current is

determined by dividing the peak transient voltage by the source impedance - this is often difficult to determine. In

many cases, however, this may be obtained from industry standard documents, customer requirements, etc.

3. Determine the maximum voltage level that the protected device can withstand (Vws). Select a suppressor which will

clamp the transient at a lower level (Vc).

Consider the transient source: lightning, electro-static discharge, inductive switching or nuclear explosion (NEMP). Often,

a 1500 watt peak pulse rated device will protect against transients due to secondary lightning effects or inductive switching

on power, data and telephone lines. A 500 watt device is sufficient to protect sensitive components against transients

generated by electro-static discharge.

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