The
Stäubli PV-MS-PLS metal spanner set is the genuine manufacturer open-end spanner and unlocking tool for both
MC4 and MC4-Evo 2 connectors, supplied as a pair in a practical
belt-fix pouch for on-roof and on-site use. Machined in metal rather than the standard plastic tool, this set is built for installers who need a more durable, long-service alternative for daily pre-tightening, locking, and unlocking of Stäubli PV connectors across repeated field use.
MC4 & MC4-Evo 2
Connector Compatibility
⚠ Genuine Stäubli tool required for connector warranty
Only genuine Stäubli spanners are verified to correctly engage and release the locking mechanism on original MC4 and MC4-Evo 2 connectors without damaging the connector housing. Using third-party or generic spanners on Stäubli connectors can compromise the IP68 seal and connector warranty.
◆ Two connector families, two spanner profiles
This set includes one spanner profiled for MC4 and one profiled for MC4-Evo 2 — they are not interchangeable despite their similar appearance. Confirm which connector family is fitted to each cable before use, and always match the correct spanner to the correct connector type.
ℹ Pre-tightening tool, not a torque tool
This spanner set is used for pre-tightening and loosening the connector cap nut and for releasing the plug-in lock. For final assembly to the manufacturer's specified torque (3.0–6.0 N·m), Stäubli's dedicated PV-WZ-TORQUE-SET torque tool should be used alongside this spanner set.
Dual Connector Compatibility
One two-piece set covers both MC4 and MC4-Evo 2 connector families, so installers working across mixed connector types don't need to carry two separate spanner sets.
Durable Metal Construction
Machined metal construction offers greater durability than the standard plastic spanner set under repeated daily use, resisting wear at the jaw and pivot points over a long installer career.
Unlocking Function Built In
Beyond pre-tightening the cap nut, the spanner profile is also used to release the plug-in connector lock, allowing safe disconnection of MC4 and MC4-Evo 2 pairs without damaging the latch.
Belt-Fix Carry Pouch Included
Supplied in a dedicated belt-mountable pouch, keeping both spanners to hand and organised on a roof or scaffold rather than loose in a tool bag.
Compact, Lightweight Field Tool
Small enough to carry alongside crimping pliers and a torque tool without adding significant bulk to an installer's belt or tool bag.
Genuine Stäubli Component
Manufactured directly by Stäubli (Multi-Contact) to the same design tolerances as the connectors themselves, ensuring a correct, non-damaging fit every time.
| Product Details |
| Type designation |
PV-MS-PLS |
| Order number |
32.6058 |
| Description |
Assembly and unlocking tool, incl. belt pouch (2 open-end spanners) |
| Material |
Metal |
| Pieces |
2 (one per connector family) |
| Compatible connectors |
MC4, MC4-Evo 2 |
| Carry case |
Belt-fix pouch (included) |
| Function |
| Primary use |
Pre-tightening and loosening the connector cap nut |
| Secondary use |
Releasing the plug-in connector lock (both MC4 and MC4-Evo 2) |
| Compatible accessory |
PV-SSH4 safety lock clip (can only be unlocked with PV-MS or PV-MS-PLS) |
Does this spanner set work on both MC4 and MC4-Evo 2 connectors?
Yes. The PV-MS-PLS set includes one spanner for original MC4 connectors and one for MC4-Evo 2 connectors, covering both current Stäubli PV connector families in a single set.
What's the difference between this and the plastic MC4 spanner set (PV-MS)?
The PV-MS is a plastic, MC4-only spanner set. The PV-MS-PLS reviewed here is the metal version covering both MC4 and MC4-Evo 2, offering greater durability for professional daily use.
Can this tool release a connector fitted with a safety lock clip?
The PV-SSH4 safety lock clip is specifically designed so it can only be unlocked using the Stäubli PV-MS or PV-MS-PLS spanner set, making this tool necessary wherever locking clips are fitted.
Is a torque tool needed alongside this spanner set?
For final assembly to the manufacturer's specified torque, yes — this spanner set handles pre-tightening and unlocking, while Stäubli's PV-WZ-TORQUE-SET is used to apply the correct final torque (3.0–6.0 N·m) to the cap nut.
Does the belt pouch fit on a standard tool belt?
Yes, the pouch supplied with the PV-MS-PLS is designed to be belt-mounted, keeping both spanners accessible during roof-level installation work.
