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NUD3112DMT1G

12V relay/inductive load driver, 400mA, Zener clamp, SC-74

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Pieza del fabricante：

NUD3112DMT1G

Paquete：

SC-74 / SOT-457 (3.0 x 1.5 x 0.94 mm)

Marca：
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Descripción

Productos

The NUD3112DMT1G from onsemi is an integrated relay and inductive load driver in a 6-pin SC-74 (SOT-457) package. It integrates an N-channel MOSFET switch with ESD protection and Zener clamp, eliminating the need for external freewheeling diodes when driving inductive loads such as 12V relay coils up to 6W.

Especificaciones

Función Inductive Load Driver / Relay Driver
Number of Drivers 2
Maximum VCC 14V
Corriente de salida 300-400 mA per driver
RDS(ON) 0.9 Ohm max
Breakdown Voltage (VDSS) 14V
Gate-Source Breakdown 6V
Power Dissipation 380 mW
Relay Coil Rating Up to 6W at 12V
Input Type Logic level
Internal Protection Zener clamp (no freewheeling diode needed)
ESD Protection Integrated
Temperatura de funcionamiento -40 to +85 C
Paquete SC-74 / SOT-457 (3.0 x 1.5 x 0.94 mm)
Status Last Shipments / Obsolete
RoHS Yes

Características

  • Integrated MOSFET switch + Zener clamp + ESD protection
  • No external freewheeling diode required
  • Optimized for 12V relay coil driving
  • Up to 6W relay coil at 12V
  • Logic level input compatible
  • Internal Zener routes induced current to ground for quiet operation
  • Low RDS(ON) reduces system current drain

Aplicaciones

  • Telecom line cards, modems
  • TV, VCR, stereo receivers
  • Small appliances, security systems
  • Photocopiers, printers

The NUD3112DMT1G from onsemi is an integrated relay and inductive load driver in a 6-pin SC-74 (SOT-457) package. The DMT suffix denotes the SC-74 package, 1G indicates lead-free. The device integrates all necessary components for driving inductive loads: an N-channel MOSFET switch for load control, an internal Zener clamp that eliminates the need for external freewheeling diodes, and ESD protection for robust operation. When the MOSFET turns off, the inductive kick from the relay coil is clamped by the internal Zener diode, routing the induced current to ground for quieter system operation. The device accepts logic level inputs, making it compatible with direct MCU drive. Optimized for 12V relay rails, it can drive relay coils rated up to 6W at 12V with 0.9 ohm maximum RDS(ON). Note: This device is in Last Shipments status; consider NUD3120DMT1G as a newer alternative.

The NUD3112DMT1G operates through three integrated subsystems: (1) MOSFET Switch: An N-channel power MOSFET with 0.9 ohm RDS(ON) connects the load to ground when the gate is driven high by the logic input. The MOSFET is rated for 14V drain-source breakdown and can sink 300-400mA continuously. (2) Zener Clamp: When the MOSFET turns off, the collapsing magnetic field in the inductive load generates a back-EMF voltage spike. The internal Zener diode clamps this voltage and provides a path for the inductive current, which flows through the Zener to ground. This eliminates the need for an external freewheeling diode across the relay coil and routes the induced energy to ground rather than back into the supply rail, resulting in quieter system operation. (3) ESD Protection: Internal ESD protection on the input pin protects the gate oxide from electrostatic discharge events during handling and operation.

Pin Nombre Tipo Descripción
1 GND Potencia Ground (source of MOSFET)
2 EN Entrada Logic level gate drive input
3 VCC Potencia Supply voltage (12V typical)
4 DRAIN Salida MOSFET drain (load connection)
5 GND Potencia Ground (source of MOSFET)
6 DRAIN Salida MOSFET drain (second load)
  • 12V relay driver with integrated Zener clamp eliminating external freewheeling diode in telecom line cards
  • Solenoid driver for security system door locks with logic-level MCU control
  • Small DC motor driver in office automation equipment with ESD-protected input
  • Multiple relay driver using dual outputs for printer paper feed and carriage control
Modelo Fabricante Paquete Notas
NUD3120DMT1G onsemi SC-74 Newer replacement, same function
NUD3105DMT1G onsemi SC-74 Single driver version
TPL7407LA TI TSSOP-16 7-channel relay driver
ULN2003A TI/onsemi DIP-16 7-channel Darlington driver
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Tel / WhatsApp: +86 13760382860

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Materialparts is a professional electronic component supplier based in Shenzhen, China, with over 20 years of global trading experience. We integrate component procurement, quality inspection, technical support, customized packaging, and global delivery services to provide one-stop supply chain solutions. Our business covers industrial control, automotive electronics, consumer electronics, medical devices and other industries. We always adhere to genuine sources, stable supply and considerate after-sales service.

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Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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