| 5821602 | QES-1000 module analog I/O | ZTR | | |
| 5821611 | QES1000 digital I/O transient suppressor | ZTR | | |
| 5821612 | QES-1000 analog input transient suppressor module | ZTR | | |
| 5821613 | QES-1000 axle generator transient suppressor module | ZTR | | |
| 5821614 | QES1000 module multifunction transient suppressor | ZTR | | |
| 5821615 | QES1000 transient suppressor CPU | ZTR | | |
| 5821616 | QES1000 power supply | ZTR | | |
| 5821618 | QES-1000 sensor transient suppressor | ZTR | | |
| 5821653 | QES-1000 voltage regulator transient suppressor | ZTR | | |
| 5824004 | QES axle and digital input circuit board, TTD, without faceplate | ZTR | | |