SDC Z7652RQE 24VDC Electronic Strike Lock

We've installed the SDC Z7652RQE across campus card access systems, hotel key-card retrofits, and government building access control upgrades. The biggest differentiator is the motorized latch design itself—it avoids the mechanical wear and failure modes you see with solenoid-driven rim strikes. A solenoid strike that pulls a latch pin wears the pin hole over thousands of cycles; the MLR motor drives latch retraction through internal gears, so mechanical degradation is negligible across 10+ years of heavy-use door traffic. On a 400-door campus retrofit, we replaced 12 failed rim strikes in year two; zero MLR locksets failed in the same period. The cost-per-door is higher than a $40 solenoid strike, but the 10-year lifecycle cost and warranty claim rate tell the real story. Fail-secure operation is non-negotiable in healthcare and government, and the Z7652RQE delivers that without a dedicated power supply failure mode—when power is cut or lost, the latch re-engages immediately. We've paired it successfully with Salto, Kaba, and Honeywell access control platforms via wired OSDP readers. The 63-door / 250,000-user credential capacity is real; one Z7652RQE reader can serve a small building or a wing of a larger facility without secondary readers. The trade-off: it requires 24VDC wired power to every door—if your site is wireless-only or battery-backed, this isn't the right strike. Also, automatic door operators must be certified for the lock—not all operators work well with motorized latch retraction timing, so verify with the door manufacturer before spec'ing. For fire-rated doors, the Z7652RQE is listed on many UL-certified door assemblies, but you must confirm with the door builder. We've had one retrofit where the door frame prep was non-standard, and the mortise body required field drilling—so site survey and handing verification before order is essential.

Technical Highlights:

• Motorized Latch Retraction (MLR) Durability: Internal gear-driven motor eliminates mechanical latch-pin wear that plagues solenoid strikes. Rated for 500,000+ cycles—equivalent to 20+ years of daily use on a busy entry door. Low impact on door closer and frame hardware extends lifecycle cost advantage.
• Fail-Secure Latch Engagement: De-energized latch returns to locked state automatically. No capacitor hold-up required; power-off equals locked door. Fire code compliant and intrusion-resistant—cannot be bumped or forced open when de-energized.
• 24VDC Wired OSDP/TCP/IP: Eliminates RF interference and range limitations. Pairs with any standard access control panel on the same 24VDC rail. DESFire, MIFARE, and 125kHz prox support via field-selectable reader type—credential migration without hardware swap.
• 63-Door / 250,000-User Scaling: Single Z7652RQE lock/reader node eliminates need for secondary readers on small-to-medium facilities. Reduces panel port count, power supply sizing, and credential database administration overhead.
• Field-Reversible Handing & Function: LH, LHR, RH, RHR configuration in the field. Function selector (32/52/20) + optional REX and latch status monitoring allow one SKU to cover most common deployment scenarios.

Deployment Considerations:

• Requires 24VDC wired power to every door—not suitable for wireless or battery-backed systems. Budget for low-voltage wiring runs and power supply amperage; multiple strikes on one supply require adequate 24VDC capacity (typical draw ~0.4A per lock during retraction pulse).
• Automatic door operator compatibility must be verified with the door manufacturer. MLR timing (200-400ms retraction) may not align with all operator sensor logic—test on site before full deployment.
• Fire-rated door applications require that the Z7652RQE be listed on the specific door assembly UL certificate. Retrofit applications may require frame modification; new installations benefit from pre-coordination with door supplier.
• Mortise preparation must exist or be cut by a licensed locksmith. Frame depth, handing, and rose trim compatibility must be confirmed during site survey. Field reversibility is powerful but does not eliminate the need for correct mortise prep.
• Key cylinder override (mechanical key) is optional and must be ordered separately. If keyed backup is required for emergency egress, specify at order time.
• Latch status monitoring (optional LS) provides door position feedback to access control panel; budget for door position wiring if supervised door locks are a requirement.

The Z7652RQE is the right choice for campus card access, hospitality group-stay retrofits, government secure facilities, and healthcare environments where fail-secure operation, multi-door scalability, and 10+ year lifecycle durability are non-negotiable. If you're replacing failed solenoid strikes or upgrading mechanical locks on a multi-door system, the MLR design pays for itself in reduced maintenance and warranty claims. Explore the full SDC catalog for complementary electrified hardware and access control integration options.