MMSZ4691T1G

MMSZ4691T1G is a surface‑mount Zener diode in the MMSZ family used for voltage regulation and overvoltage protection. The MMSZ series consists of small, low‑power Zeners (about 0.5 W) designed for reverse‑bias operation to clamp a supply rail or provide a reference. The “4691” code identifies the nominal Zener voltage (VZ) per the datasheet, while the “T1G” suffix indicates the packaging/variant (SMD, tape/box or reel) used by the manufacturer. Typical applications include protecting inputs and rails on PCBs, stabilizing voltages in compact regulators, and providing transient protection in consumer electronics. Key features often cited are tight Zener tolerance, relatively low dynamic resistance, fast transient response, and RoHS compliance. For exact VZ, tolerance, IZ, power rating, leakage, and package dimensions, refer to the official MMSZ4691T1G datasheet.

- Zener diode for voltage regulation, clamping, and reference circuits
- Nominal Zener voltage: 9.1 V (MMSZ4691T1G)
- Power rating: 0.5 W (500 mW)
- Package: SMT, SOD-123 (MMSZ series), RoHS-compliant
- Temperature range: typically -55°C to +125°C
- Zener voltage tolerance: ±5%
- Suitable for surface-mount designs and compact regulators
- Common applications: power supplies, overvoltage protection, reference circuits

- Pin count: 2 terminals (two-terminal device: anode and cathode)
- Function: Zener diode used to regulate or clamp voltage; operates in reverse breakdown to maintain a defined zener voltage (for regulation, reference, or overvoltage protection).

Manufacturer: Micro Commercial Components (MCC).
What kind of company: MCC is a U.S.-based semiconductor manufacturer and global supplier specializing in discrete semiconductor components—especially diodes (including Zener and signal diodes), transistors, MOSFETs and related small-signal parts—sold through electronics distributors to OEMs and hobbyists.

MMSZ4691T1G is a Zener diode in SOD-123 packaging. Its main use is voltage regulation and transient protection. Common application areas include:
- Voltage regulation/reference in low-power DC circuits
- Overvoltage protection and rail clamping
- Transient suppression for automotive, consumer electronics, and telecom equipment
- ESD/over-voltage protection on I/O interfaces (USB, data buses)
- Protective clamping in battery-powered microcontroller and sensor circuits

The MMSZ4691T1G is supplied in a SOD-123 (SOD-123FL) surface-mount package; the T1G suffix indicates tape-and-reel packaging for automated assembly.