At the end of Toshiba part numbers, if there is an (LF1, LF2, LF4, etc.) suffix, this suffix is referring to the lead form style. Please verify the manufacturer drawings for the package case dimensions.
Standard (0.300",7.62mm)

Examples with “Lead Form”
Example (LF1) on 6 pin surface mount

Example (LF2) on 6 pin through hole dip

Example (LF4) on 6 pin surface mount

Example (LF5) on 6 pin surface mount

Example (LF6) on 4 pin surface mount

Example (LF7) on 4 pin surface mount

Toshiba numbers
TLP751(D4-LF1,F), TLP624LF1F, TLP551(Y-LF1,F), TLP627M(LF1,E, TLP759(D4-LF1,J,F), TLP627M(LF1,E(OX4, TLP759(LF1,J,F), TLP531(GR-LF1,F), TLP371(LF1,F), TLP627-4(LF1,F), TLP631(GB-LF1,F), TLP570(LF1,F), TLP550(Y-LF1,F), TLP512(NEMIC-LF1,F, TLP532(BL-TLF1,F), TLP331(BV-LF1,F), TLP550-LF1,F), TLP731(GB-LF1,F), TLP750(D4-LF1,F), TLP531(BL-LF1,F), TLP550(LF1,F), TLP624-4(LF1,F), TLP552(LF1,F), TLP631(BL-LF1,F), TLP571(LF1,F), TLP624-2(LF1,F), TLP631(LF1,F), TLP731(D4-GR-LF1,F, TLP750(D4-O-LF1,F), TLP731(D4-GB-LF1,F, TLP732(GB-LF1,F), 4N35(SHORT-LF1,F), TLP732(D4-GB-LF1,F, TLP732(GR-LF1,F), TLP372(LF1,F), TLP531(LF1,F), TLP512(LF1,F), TLP513(LF1,F), TLP632(GB-LF1,F), TLP627-2(LF1,F), TLP352(LF1,F), TLP250LF1F, TLP523-2(LF1,F), TLP250(D4SND-LF1,F, TLP523-4(LF1,F), TLP351(LF1,Z,F), TLP352(LF1,S), TLP350(LF1,Z,F), TLP250(D4-LF1), TLP250(D4INV-LF1,F, TLP350(D4-LF1,Z,F), TLP250(D4-LF1,F), TLP523(LF1,F), TLP250(MBSKO-LF1,F, TLP3545(LF1,F), TLP222A-2(LF1,F), TLP240GA(LF1,F, TLP240J(LF1,F, TLP3554(LF1,F), TLP241A(D4,LF1,F, TLP240G(LF1,F, TLP241A(LF1,F, TLP240D(LF1,F, TLP240A(LF1,F, TLP3544(LF1,F),
TLP2601(LF1,F), TLP250H(D4-LF1,F), TLP250H(LF1,F), TLP2630(LF1,F), TLP2631(LF1,F), TLP2200(LF1,F), TLP3083(TP1,F, TLP3073(LF1,F, TLP3062A(LF1,F, TLP785(GR-LF6,F, TLP781(GRL-LF6,F), TLP781(D4-YH-LF6,F, TLP781(D4-GB-LF6,F, TLP785(LF6,F, TLP785(GRH-LF6,F, TLP781(D4-Y-LF6,F), TLP781(D4-BL-LF6,F, TLP785(D4-LF6,F, TLP781(D4GRL-LF6,F, TLP785(Y-LF6,F, TLP781(D4-GR-LF6,F, TLP781(Y-LF6,F), TLP781(D4GRH-LF6,F, TLP781(LF6,F), TLP781(D4BLL-LF6,F, TLP781(D4-LF6,F), TLP781(GB-LF6,F), TLP785(GB-LF6,F, TLP781(BL-LF6,F), TLP785(BL-LF6,F, TLP785(YH-LF6,F, TLP781(YH-LF6,F), TLP781(GRH-LF6,F), TLP781(BLL-LF6,F), TLP785(BLL-LF6,F, TLP781(GRH-LF6,F), TLP781(BLL-LF6,F), TLP785(BLL-LF6,F, TLP785F(LF7,F, TLP781F(D4GR-LF7,F, TLP781F(D4-LF7,F), TLP781F(BL-LF7,F), TLP781F(D4-Y-LF7,F, TLP781F(GRL-LF7,F), TLP785F(GB-LF7,F, TLP781F(GRH-LF7,F), TLP781F(BLL-LF7,F), TLP781F(YH-LF7,F), TLP785F(D4-LF7,F, TLP785F(Y-LF7,F, TLP781F(D4YH-LF7,F, TLP781F(Y-LF7,F), TLP785F(YH-LF7,F, TLP785F(D4BLF7,F, TLP781F(D4BL-LF7,F, TLP781F(D4GB-LF7,F, TLP781F(GR-LF7,F), TLP785F(GR-LF7,F, TLP781F(GB-LF7,F), TLP781F(LF7,F), TLP785F(BL-LF7,F, TLP781F(LF7,F), TLP785F(BL-LF7,F, TLP734(D4GRLF5,M,F, 4N26(SHORT-LF5,F), 4N35(SHORT-LF5,F), TLP531(Y-LF5,F), TLP631(LF5,F), TLP732(D4GRH-LF5,F, TLP550(LF5,F), TLP624-2(LF5,F), TLP331(LF5,F)