| POS | BIB | ATHLETE | Result | REACTION TIME | Note | |
|---|---|---|---|---|---|---|
| 1 | 511 | KIAN LABAR |
48.23 | Q | ||
| 2 | 214 | RANGGA ADE |
49.69 | Q | ||
| 3 | 104 | MUHAMAD QARLIFF KUYT BIN ABDULLAH |
49.84 | Q | ||
| 4 | 423 | AMOS MAHAKANJANA UNGER |
50.08 | q | ||
| 5 | 605 | MG MIN MYAT NAING |
52.35 | |||
| 6 | 006 | ARDAN HAO LEE |
54.78 | |||
| 7 | 702 | YISANGSOUN LAOLI |
56.29 |
| POS | BIB | ATHLETE | Result | REACTION TIME | Note | |
|---|---|---|---|---|---|---|
| 1 | 422 | ADISAK PORNSOMPHOT |
49.16 | Q | ||
| 2 | 309 | SEAN RUSSELL TAY |
50.24 | Q | ||
| 3 | 113 | KABEENESH AL MANICKAM |
50.33 | Q | ||
| 4 | 513 | JOHN CLINTON MITCHEL ABETONG |
50.62 | q | ||
| 5 | 220 | GILANG SATRIA WIBAWA |
52.75 | |||
| 6 | 019 | AMERSSON RINGKHAI ANTONY |
55.26 |
| POS | HEAT | BIB | TEAM | ATHLETE | RESULT | WIND |
|---|---|---|---|---|---|---|
| 1 | 1 | 511 | PHILIPPINES | KIAN LABAR | 48.23 Q | |
| 2 | 2 | 422 | THAILAND | ADISAK PORNSOMPHOT | 49.16 Q | |
| 3 | 1 | 214 | INDONESIA | RANGGA ADE | 49.69 Q | |
| 4 | 1 | 104 | MALAYSIA | MUHAMAD QARLIFF KUYT BIN ABDULL | 49.84 Q | |
| 5 | 1 | 423 | THAILAND | AMOS MAHAKANJANA UNGER | 50.08 q | |
| 6 | 2 | 309 | SINGAPORE | SEAN RUSSELL TAY | 50.24 Q | |
| 7 | 2 | 113 | MALAYSIA | KABEENESH AL MANICKAM | 50.33 Q | |
| 8 | 2 | 513 | PHILIPPINES | JOHN CLINTON MITCHEL ABETONG | 50.62 q | |
| 9 | 1 | 605 | MYANMAR | MG MIN MYAT NAING | 52.35 | |
| 10 | 2 | 220 | INDONESIA | GILANG SATRIA WIBAWA | 52.75 | |
| 11 | 1 | 006 | BRUNEI | ARDAN HAO LEE | 54.78 | |
| 12 | 2 | 019 | BRUNEI | AMERSSON RINGKHAI ANTONY | 55.26 | |
| 13 | 1 | 702 | LAOS | YISANGSOUN LAOLI | 56.29 |