MMSZ5244BT1G 14V Surface Mount Zener Diode (500mW, SOD-123)

Provide reliable voltage regulation and localized overvoltage protection for your 12V DC power lines and industrial sensor interfaces with the MMSZ5244BT1G Zener diode. Standard nominal 12V power supplies, lead-acid batteries, and automotive rails frequently fluctuate up to 13.8V–14.2V during operation. Using a 12V Zener diode for regulation or clamping in such environments leads to continuous conduction and excessive heat. Featuring a nominal Zener voltage of 14V ($V_Z$), the MMSZ5244BT1G offers the perfect operating threshold—remaining inactive during normal 12V–13.8V conditions and triggering precisely when voltage exceeds safe limits.

Capable of dissipating up to 500mW of power, this diode is ideal for biasing operational amplifiers, generating stable reference voltages, and clamping inductive spikes on MOSFET gates or sensor inputs. Housed in the compact, industry-standard SOD-123 surface-mount package, it provides excellent thermal dissipation and structural durability for space-constrained DIY electronics, automotive accessories, and industrial control boards.

Key Features:

• 14V Nominal Threshold ($V_Z$): Ideal for 12V power rails and automotive circuits, avoiding premature conduction during standard charging voltages (~13.8V).

• 500mW Power Rating: Higher power dissipation capability compared to standard 200mW/300mW Zener diodes in similar packages.

• Precision Regulation: Serves as a stable voltage baseline for analog biasing, comparator reference stages, and low-current regulation.

• Standard SOD-123 Package: Compact surface-mount footprint for dense PCB layouts while remaining easy to hand-solder and inspect.

Specifications:

• Part Number: MMSZ5244BT1G

• Diode Type: Zener Diode

• Nominal Zener Voltage ($V_Z$): 14V

• Power Dissipation ($P_D$): 500mW

• Voltage Tolerance: ±5%

• Package Type: SOD-123 (SMD/SMT)