Exhibit 99.1350CERT

         Certification Pursuant to Rule 30a-2(b) under the 1940 Act and
                      Section 906 of the Sarbanes Oxley Act

Pursuant to 18 U.S.C. ss. 1350, the undersigned officer of BlackRock Basic Value
Principal Protected Fund of BlackRock Principal Protected Trust (the
"registrant"), hereby certifies, to the best of his knowledge, that the
registrant's Report on Form N-CSR for the period ended June 30, 2008, (the
"Report") fully complies with the requirements of Section 15d of the Securities
Exchange Act of 1934, as amended, and that the information contained in the
Report fairly presents, in all material respects, the financial condition and
results of operations of the registrant.

Date: August 22, 2008


/s/ Donald C. Burke
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Donald C. Burke
Chief Executive Officer (principal executive officer) of
BlackRock Basic Value Principal Protected Fund of
BlackRock Principal Protected Trust

Pursuant to 18 U.S.C. ss. 1350, the undersigned officer of BlackRock Basic Value
Principal Protected Fund of BlackRock Principal Protected Trust (the
"registrant"), hereby certifies, to the best of his knowledge, that the
registrant's Report on Form N-CSR for the period ended June 30, 2008, (the
"Report") fully complies with the requirements of Section 15d of the Securities
Exchange Act of 1934, as amended, and that the information contained in the
Report fairly presents, in all material respects, the financial condition and
results of operations of the registrant.

Date: August 22, 2008


/s/ Neal J. Andrews
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Neal J. Andrews
Chief Financial Officer (principal financial officer) of
BlackRock Basic Value Principal Protected Fund of
BlackRock Principal Protected Trust

This certification is being furnished pursuant to Rule 30a-2(b) under the
Investment Company Act of 1940, as amended, and 18 U.S.C. Section 1350 and is
not being filed as part of the Form N-CSR with the Securities and Exchange
Commission.