SDC Z7250EQR6PKA 12/24VDC Electronic Strike

We've installed the Z7250EQR6PKA across a range of multi-building campuses, retrofit office parks, and mixed-use industrial facilities. What sets it apart from typical electronic strikes is the engineering discipline: the solenoid mechanism is encapsulated inside a standard cylindrical lockset body, which means you're not bolting a separate electrified hardware piece to the door frame. For retrofit work, that's huge. You remove the mechanical cylinder, drop in the Z7250, and you're done—no frame drilling, no power conduit runs to external strikers, no visible hardware changes. On a 50-door retrofit, that's measurable cost and schedule savings. The OSDP and TCP/IP native support also eliminates a generation of interface complexity. Old-school electronic strikes required relay cards, hardwired status inputs, and separate 12V/24V power conditioning. The Z7250 plugs directly into a modern access controller (Salto X-Series, Genetec, Hikvision, etc.) and reports latch state in real time. We've seen sites cut troubleshooting time by 40–50% because a technician can confirm a stuck latch or power supply fault from the ACP dashboard instead of walking the building with a multimeter.

The dual-voltage capability is more than a convenience—it's a deployment multiplier. On a single building retrofit, you might have 24VDC mains for the main entrance and critical-access points, but 12VDC battery backup for emergency egress routes. The Z7250's field-selectable regulator handles both without SKU changes. We've also seen it eliminate last-minute power supply redesigns when a facility discovers a brownout or voltage sag on its 24VDC distribution. The integrated regulator absorbs that fluctuation gracefully.

Technical Highlights:

• Grade 1 Solenoid Clutch: Heavy-duty mechanism rated for 500,000+ cycles without functional degradation. On high-traffic doors (main lobbies, emergency exits), the clutch survives repeated unlock/lock transitions that would wear out lower-grade mechanisms within 2–3 years. Real operational cost: fewer lockset replacements over a 10-year facility lifecycle.
• OSDP + TCP/IP Native: Direct integration with modern ACP eliminates intermediate gateway hardware and associated maintenance burden. On a 63-door system, that's fewer network nodes to monitor and update. Event logging flows directly to the ACP, so audit trails and non-compliance reports are immediate and verifiable.
• 250,000-User Credential Pool: Single system can onboard a large population without credential segregation across sub-systems. Multi-site organizations can unify credential management across a campus, reducing administrative overhead and human error in access provisioning.
• Fire Door Compliance by Design: Lockset stays latched even when solenoid is de-energized (failsafe or failsecure mode selectable at install). Maintains fire-rated door integrity; no additional door-closer or magnetic latch retrofit required. Latch-status monitoring is standard, so you have real-time visibility into whether the fire door has been propped open or forced.
• Retrofit-Ready Cylinder Replacement: Fits standard cylindrical lockset cavities. Eclipse and Galaxy rose options, plus five finish palettes (chrome, brass, bronze, oil-rubbed), allow aesthetic matching to existing door hardware. No custom millwork or special frame prep.

Deployment Considerations:

• Function Mode (50 = Failsafe, 52 = Failsecure) is a one-time installation decision. You cannot reprogram it in the field—if requirements change post-installation (e.g., facility upgrades fire egress routes), you'll need to replace the lockset. Clarify functional requirements with the end-user and fire marshal before ordering.
• Field voltage selection (12 or 24VDC) is set at installation via a jumper and cannot be changed remotely. Install the voltage that matches your site's permanent power distribution. If you later add a 24V-only power supply to a 12V site, the lockset will not auto-sense or adapt—it will not unlock properly. Verify site power architecture before shipment.
• Latch-status monitoring is standard; request-to-exit (REX) is an optional add-on. If your access control system requires REX input (common on emergency egress doors), specify it during procurement—retrofit installations will require door-frame cutouts for a separate REX sensor.
• OSDP and TCP/IP require network connectivity and ACP support. Older access control systems (hardwired relay boards, legacy panel firmware) cannot communicate with the Z7250. Verify your ACP supports OSDP or TCP/IP before ordering. If you're retrofitting a site with legacy wiring, you may need a parallel network drop or ACP upgrade.
• The integrated power regulator requires a stable 12 or 24VDC supply line. If your power supply has chronic voltage sag or ripple, the regulator may not filter it adequately, and the solenoid may not engage reliably. On sites with questionable power quality, add a dedicated UPS or isolation transformer.
• Cylinder keying options (Keyed Alike, Keyed Different, SFIC 7-Pin I-Core Prep) are ordered at manufacture. You cannot rekey or change cylinder options in the field without replacing the entire lockset. Determine key management policy (master key system, SFIC core interchange, etc.) before placing the order.

The Z7250EQR6PKA is the right choice for mid-to-large commercial and industrial deployments where retrofit simplicity, unified credential management, and real-time latch visibility matter. It's not ideal for single-door installations or legacy environments without OSDP/TCP/IP infrastructure—a simpler magnetic lock or external solenoid strike is cheaper and faster to install. But if you're managing a 15+ door retrofit or a new 50-door facility with mixed credential types and multi-building access policies, the Z7250 eliminates integration friction and reduces total cost of ownership over the system lifetime. Explore the complete SDC catalog for complementary access control hardware.