SZMMBZ18VALT1G

SZMMBZ18VALT1G is a two‑terminal surface‑mount transient-voltage-suppressor (TVS) diode in the MMBZ family. It provides protection against voltage transients (ESD and surges) on lines whose normal operating voltage is up to about 18 V. The device clamps excess voltages to keep protected circuitry safe and is fast with low leakage. The “18V” indicates its standoff/breakdown voltage; the exact clamped voltage depends on the surge current. The “ALT1G” suffix denotes the packaging/lead-free (T&R) option in a small SMD form factor. Typical uses include protecting 12–24 V automotive/industrial power rails or I/O lines near connectors. For precise specifications—breakdown voltage tolerance, leakage, peak pulse power, and packaging details—consult the MMBZ18VALT1G datasheet (from On Semiconductor or the SZ distributor).

Equivalent products for SZMMBZ18VALT1G (18 V Zener, SMT, SOT-23/SOD-123):
- ON Semiconductor MMBZ18VALT1G (same device)
- Vishay BZX84-C18 (SOT-23)
- Vishay BZT52H-C18 (SOD-123)
- Diodes Incorporated BZT52H-C18 (SOD-123)
Note: check package, power rating, and tolerance; values may vary slightly.

Here are the key features of SZMMBZ18VALT1G:
- 18 V Zener diode (Zener voltage Vz = 18 V) in SOT-23 package
- 0.5 W maximum dissipation
- Unidirectional Zener for regulation and overvoltage protection
- Zener voltage tolerance typically ±5% (A-grade)
- Wide operating temperature range: -55°C to +125°C
- RoHS-compliant, lead-free
- Packaging: T1G (SOT-23, reel/packaging variant)
- Suitable for voltage reference, clamp/overvoltage protection in small-signal power circuits
Note: For exact electrical specs (IZT, ZZT, leakage, etc.), please consult the datasheet.

- Pin count: 2 pins (two-terminal device: anode and cathode).
- Function: unidirectional Zener/TVS diode with about 18 V Zener breakdown; clamps voltage spikes and provides overvoltage/ESD protection by diverting excess voltage to ground.

- Manufacturer: ON Semiconductor (onsemi).
- What kind of company: An American multinational semiconductor company that designs, manufactures, and sells semiconductor components (diodes, transistors, integrated circuits, power management) and provides energy-efficient solutions for automotive, industrial, communications, and consumer markets.

SZMMBZ18VALT1G is a surface-mount Zener/TVS diode (MMBZ family) with about 18 V breakdown. It provides transient voltage suppression and ESD protection for lines and rails. Typical applications: clamping and protecting 18 V–rated power rails and I/O pins from surges; protecting microcontrollers, sensors, and analog/digital front ends; protection for automotive, industrial, and consumer electronics; data-interface protection (USB, CAN, RS‑485, Ethernet lines); general-purpose voltage regulation/reference in low-power circuits requiring a fixed 18 V clamp.

SOD-123 2-pin surface-mount package (Zener/TVS diode).