17 July 2025Products

HSL C103 from STUV: Modern hybrid prison lock with night locking and access control

STUV presents the new high-security prison lock HSL C103 – the benchmark for modern electromechanical locking technology

Steinbach & Vollmann presentsthe HSL C103, a new electromechanical high-security prison lock that stands for maximum reliability, durability, and versatility. As a hybrid lock, it combines electronic control with robust mechanical locking technology, thus meeting all the requirements of modern correctional facilities.

The HSL C103 is a high-quality mortise lock made of stainless steel and combines two independent locking methods: In electric mode, the lock is released by a 24 V DC signal. As long as this signal is present, the deadbolt can be retracted via a handle or rotary knob – on one or both sides. After closing, the lock automatically locks via the snib. In manual mode, unlocking is performed using a special HSL double bit key. Here too, the deadbolt is retracted via the handle, whereby the key cannot be removed while the door is open. This prevents incorrect operation and ensures maximum reliability, even in the event of a power failure.

A special feature of the HSL C103 is the night lock: this is activated with a special service key and blocks both the electric and mechanical unlocking. The deadbolt cannot then be retracted either by signal or with a standard HSL key – a crucial security feature for nighttime or emergency situations. The night lock is also deactivated using the service key, whereby a defined sequence ensures that the handle cannot be unlocked accidentally.

Thanks to its modular design, the lock can be adapted precisely to the requirements of any facility. A choice of different handle variants is available, such as T-handle, L-handle or rotary knob, each for single or double-sided operation. A special extra is the replaceable dead latch trigger, which prevents the deadbolt from being pushed back when the door is closed. Suitable variants are available depending on the door gap (3–7 mm or 7–12 mm). Key guides with insect and smoke protection are available as an option for additional security.

The HSL C103 is also ahead of its time when it comes to access control. The master/group key function allows a hierarchical locking structure with up to 21 subgroups, whereby access rights can be controlled individually. The mechanical locking technology with 7 levers can also be recoded up to nine times – without having to replace the lock or a recoding key.

The HSL C103 meets the highest standards in terms of load capacity: the mechanical deadbolt has been tested for over 500,000 inserts, and the magnetic contact has even been tested for over a million switching cycles. The bolt load withstands axial forces of up to 12.5 kN and lateral loads of up to 50 kN. For extreme operating conditions, the lock is designed for temperatures from -40 °C to +65 °C and relative humidity of up to 95%.

Electromechanical control is via potential-free contacts, with the lock generating various status messages, for example on the bolt position, night locking, unlocking or tamper monitoring. These signals can be integrated into higher-level building management systems. The installation is also designed for practical use: The lock is 100% dimensionally compatible with the CHUBB® 3R63 and is therefore ideal for retrofitting existing systems.

With compact dimensions (229 x 29 x 205 mm) and a weight of 4.4 kg, the lock can be used in steel or wooden doors – for left-hand and right-hand doors, opening inwards or outwards. The robust stainless steel construction ensures durability even under the toughest conditions.

The new HSL C103 from STUV is therefore much more than just a lock – it is an intelligent security module for correctional facilities that combines technology, mechanics, and organization in a single system. For more information, visit www.stuv.de or send an email directly to sales@stuv.de.