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This test method covers the measurement of common-emitter dc current gain (forward, hFE, or inverted, hFEI) of bipolar transitors, for which the collector-emitter leakage current, ICEO, is less than 10 % of the collector current, IC, at which the measurement is to be made, and for which the shunt leakage current in the base circuit is less than 10 % of the base current required.
This standard is being withdrawn because it does not have any relevance to Nuclear and Space Effects. This is strictly an electronic document with nothing to do with radiation and should be related to a group that deals strictly with electronics.
Formerly under the jurisdiction of Committee F01 on Electronics, and the direct responsibility of Subcommittee F01.11 on Nuclear and Space Radiation Effects, this test method was withdrawn in June 2011 with no replacement.
1.1 This test method covers the measurement of common-emitter d-c current gain (forward, hFE, or inverted, hFEI) of bipolar transistors, for which the collector-emitter leakage current, ICEO, is less than 10% of the collector current, IC, at which the measurement is to be made, and for which the shunt leakage current in the base circuit is less than 10% of the base current required.
1.2 This test method is suitable for measurement of common-emitter d-c current gain at a single given value of test transistor collector current or over a given range of collector currents (for example, over the range of the transistor to be tested).
1.2.1 The nominal ranges of collector current over which the three test circuits are intended to be used are as follows:
18.104.22.168 Circuit 1, less than 100 [mu]A,
22.214.171.124 Circuit 2, from 100 [mu]A to 100 mA, and
126.96.36.199 Circuit 3, greater than 100 mA.
1.3 This test method incorporates tests to determine if the power dissipated in the transistor is low enough that the temperature of the junction is approximately the same as the ambient temperature.
1.4 The values stated in International System of Units (SI) are to be regarded as standard. No other units of measurement are included in this standard.
1.5 This standard does not purport to address the safety problems, if any, associated with its use. It is the responsibility of whoever uses this standard to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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ASTM F528-99(2005), Standard Test Method of Measurement of Common-Emitter D-C Current Gain of Junction Transistors (Withdrawn 2011), ASTM International, West Conshohocken, PA, 1999, www.astm.orgBack to Top