Installation and Service Guide N5251-90001 7-3
PNA Series Microwave Network Analyzer System 
N5251A
  Replaceable Parts 
Replaceable Parts List
Rep
laceable Parts
Table 7-1 Replaceable Parts 
List
Keysight 
Part Number Description
Test Head Module Parts:
2110-0046 Fuse (inch) 0.5A, 125V NTD BI. Fuse for bias tee (option 017 and 018)
System Front Cables:
8121-1221 RF and LO 3.5 mm cable (48” length)
85105-60033 IF signal cable (SMA) (48” length)
85105-60030 Controller bias cable (48” length)
8121-1233 N5227A PNA front panel access port RF 1.85 mm (m)-(m) cable (30” length)
1250-2604 SMA right angle adapter (Used only with 8121-1221 cable.)
System Rear Cables:
8120-6818  Test set interface cable
5061-9038 RF cables