ON MMBT4401LT

Mfr. Part

MMBT4401LT

Manufacturer

onsemi (formerly AMI Semiconductor). Y-IC is a quality distributor of onsemi. We deliver genuine parts with traceable sourcing and provide the best products and services to support your projects.

Detailed Description

General‑purpose NPN bipolar junction transistor in a compact SOT‑23 package. Commonly used for switching and small‑signal amplification. Some databases group it under Integrated Circuits (Specialized ICs), but this device is a discrete BJT transistor. In stock quantity: 2875 units. Lead‑free/RoHS status depends on ordering suffix; see the datasheet for exact compliance details.

Key Features

General‑purpose NPN BJT for switching and amplification

Small SOT‑23 footprint saves PCB space

Industry‑standard 4401 family with broad second‑source support

Fast switching and stable performance

Low saturation voltage with proper base drive

Compatible with automated SMT assembly (tape‑and‑reel)

Key Advantages

Proven, widely used device; easy to design‑in

Multiple cross‑vendor equivalents for supply flexibility

Low cost and high availability

Simple drop‑in replacement for many 2N4401/MMBT4401 designs

Y‑IC offers reliable stock, quick delivery, and technical support

Packaging

Type: SOT‑23 (3‑lead, surface‑mount), JEDEC TO‑236AB

Material: Molded epoxy/plastic body; matte tin‑plated leads; RoHS compliant (per suffix)

Approximate size: 2.9 mm x 1.3 mm x 1.1 mm; lead pitch ~0.95 mm

Pin configuration (typical): 1 = Base, 2 = Emitter, 3 = Collector (confirm orientation in datasheet and on PCB layout)

Mounting: SMT; supplied in tape‑and‑reel for pick‑and‑place

Thermal characteristics: Power dissipation depends on PCB copper area; use generous pads/thermal vias to reduce thermal resistance; derating applies with ambient temperature

Electrical properties (overview): NPN BJT with VCEO in the tens of volts range, collector current capability in the several‑hundred‑milliamp range, moderate DC gain (hFE), and high transition frequency (ft) suitable for general switching and small‑signal amplification; refer to datasheet for exact limits

Lifecycle

Current status: Active within onsemi’s portfolio. Ordering may use current suffixes such as MMBT4401LT1G; MMBT4401LT is commonly supplied or replaced by the LT1G variant.

Equivalent or alternative models (verify pinout and ratings before use):

- onsemi MMBT4401LT1G (direct current suffix variant)

- Nexperia PMBT4401

- Diodes Incorporated MMBT4401-7-F

- Vishay MMBT4401

- MCC (Micro Commercial Components) MMBT4401-TP

- Through‑hole equivalent: 2N4401

If you need exact crosses, AEC‑Q qualifications, or help with suffix options, please contact Y‑IC sales via our website for detailed guidance

Key Application Areas

Low‑side switching of LEDs, small relays, and other loads

Signal amplification in audio and general analog stages

Level shifting, buffering, and discrete logic

Sensor interfaces and small motor/coil pre‑drivers

General‑purpose replacement in 2N4401/MMBT4401 designs

Datasheet

Y‑IC hosts the most authoritative and up‑to‑date datasheet for this product. Download it on this page to confirm absolute maximum ratings, electrical characteristics, pinout, and mechanical drawings.

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