SMAJ51A

Littelfuse
576-SMAJ51A
SMAJ51A

Mfr.:

Description:
ESD Protection Diodes / TVS Diodes 400W 51V 5% Uni-Directional

Datasheet:
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Learn more about Littelfuse SMAJ51A

Product Attribute Attribute Value Select Attribute
Littelfuse
Product Category: ESD Protection Diodes / TVS Diodes
RoHS:  
REACH - SVHC:
Unidirectional
1 Channel
51 V
SMD/SMT
82.4 V
56.7 V
SMA (DO-214AC)
4.9 A
400 W
30 kV
30 kV
- 65 C
+ 150 C
SMAJ
Reel
Cut Tape
MouseReel
Brand: Littelfuse
Pd - Power Dissipation: 3.3 W
Product: TVS Diodes
Factory Pack Quantity: 5000
Subcategory: ESD Protection Diodes / TVS Diodes
Vf - Forward Voltage: 3.5 V
Unit Weight: 61 mg
Products found:
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Attributes selected: 0

Compliance Codes
TARIC:
8541100000
CNHTS:
8541100000
CAHTS:
8541100090
USHTS:
8541100080
JPHTS:
854110090
KRHTS:
8541109000
MXHTS:
8541100199
BRHTS:
85411029
ECCN:
EAR99
Origin Classifications
Country of Origin:
China
Assembly Country of Origin:
Not available
Country of Diffusion:
Not available
The country is subject to change at the time of shipment.

Drone Subsystems

Littelfuse Drone Subsystems offer solutions for USB-C PD and Li-ion battery chargers, battery pack systems, and BLDC motors. These subsystems offer fuses for various functions, including AC input overcurrent protection and fault isolation, protection of the battery and downstream controller, pack, wiring, and controller. The drone subsystems provide TVS diodes for primary-side switching transient suppression and cell monitor IC sense line input overvoltage protection. These subsystems are appropriate for various drones, including toy, camera, First-Person View (FPV), enterprise, industrial, Intelligence, Surveillance, and Reconnaissance (ISR), inspection/mapping, agriculture, and heavy lift. Typical applications include delivery/logistics, public safety, border surveillance, and military.

Commercial & Tactical UAV Systems

Littelfuse Commercial and Tactical Unmanned Aerial Vehicle (UAV) Systems offer solutions for Li-Ion battery protection, battery chargers, and power distribution. These systems provide fuses for input protection/overcurrent protection, MOSFETs for semiconductor switching, and TVS diodes for DC output transient/surge protection. The commercial and tactical UAV systems offer battery protection >60V and provide main-pack fault isolation, battery disconnect/power path control (pre-charge support), and branch circuit overcurrent protection. Typical applications include Intelligence, Surveillance, and Reconnaissance (ISR), military, border surveillance, agriculture, delivery/logistics, inspection, and public safety.

Consumer Drone Systems

Littelfuse Consumer Drone Systems offer solutions for battery chargers, battery systems, and payload systems. These systems provide Schottky diodes for output rectification/reverse blocking, TVS diodes for secondary protection against voltage transients, and fuses to protect the power stage from overcurrent. The systems offer USB-C® for consumer drones with a 5V to 48V range and up to 240W (typical 100W to 140W), and provide battery protection for <60V. Typical applications include photography/video, FPV racing, and recreational flying.

Connected Drug Delivery Device Ecosystem Solutions

Littelfuse features a wide portfolio of products used to build and enhance drug delivery systems. These drug delivery systems include auto-injectors, continuous glucose monitors, insulin pumps, drug delivery pens, and wearable injectors. Products offered by Littelfuse for these applications include detect switches, plunger position sensors, microcontrollers, thermistors, TVS diode arrays, gate drivers, and fuses.

Major Appliance Solutions

Littelfuse offers a broad portfolio of products designed for major appliances, such as cold storage, coffee machines, blenders, and air purifiers. These products include fuses, TVS diodes, load switches, MOVs, TVS diode arrays, reed sensors, reed switches, and TMR sensors. Additional applications for the Littelfuse major appliance solutions are residential AC units, vending machines, washing machines, commercial ice makers, microwave ovens, and rice cookers.

LED Lighting Solutions

Littelfuse LED Lighting Solutions support all facets of the LED lighting market with innovative solutions that not only meet regulatory standards but also increase equipment safety and reliability. To help protect end-users, Littelfuse works closely with many LED driver IC suppliers, to ensure their evaluation boards and reference designs comply with safety and surge immunity requirements. They also assist LED lighting power supply manufacturers in designing optimal protection schemes for their driver modules. At the OEM level, they cooperate with luminaire and lamp manufacturers to ensure their products are optimally designed for robust surge immunity protection.

Electrical Vehicle AC Chargers

Littelfuse provides a wide range of products that are suitable for Electric Vehicle AC Chargers. Although simpler in nature compared to DC chargers, AC charging stations safely deliver AC power from the electrical grid into the vehicle. Due to space and weight constraints in the vehicle, on-board chargers and AC charging stations are typically limited to lower amounts of power (22kW or less), which means charging time is slow – taking several hours. These systems also rely on a vehicle’s on-board charger to enable the conversion of AC power from the grid into DC power to charge the vehicle’s battery. It’s critical that proper measures are taken to safeguard both the charger and vehicle.

Transient Voltage Suppressor (TVS) Diodes

Littelfuse TVS (Transient Voltage Suppression) Diodes are a broad range of circuit protection products designed to protect electronic circuits against transients and overvoltage threats such as EFT (electrically fast transients) and ESD (electro-static discharge). Lightning strikes, inductive load switching, and ESD cause electrical over-stresses associated with the transmission on data lines and electronic circuits. Offered in a variety of surface mount and through-hole circuit board mounting formats, the TVS Diode portfolio includes high peak pulse current and peak pulse power options up to 20kA and 30kW, respectively. Littelfuse TVS Diodes are chosen for the fast response time (low clamping voltage), lower capacitance, and low leakage current. TVS Diodes are available in both unidirectional (unipolar) or bidirectional (bipolar) diodes circuit configurations. 

SMAJ TVS 400W Diodes

Littelfuse SMAJ TVS (Transient Voltage Suppression) 400W Diodes are surface-mount diodes designed specifically to protect sensitive electronic equipment from voltage transients induced by lightning and other transient voltage events. These diodes offer 400W peak pulse power capability at 10µs x 1000µs waveform. Littelfuse SMAJ  diodes feature a fast response time, typically less than 1.0ps from 0V to VBR minimum. These diodes are ideal for the protection of I/O interfaces, VCC bus and other vulnerable circuits used in telecom, computer, industrial, and consumer electronic applications.

Heat Pumps

Littelfuse provides a broad portfolio of components for heat pumps, including fuses, TVS diodes, gate drivers, and more. The heat pump market is growing quickly, driven by government initiatives to reduce greenhouse gas emissions and rising energy costs. With inverter-driven motors improving system efficiencies, heat pumps can now be used in a wide range of climates. Learn how Littelfuse technologies make heat pumps safer, more reliable, and more energy efficient. Heat pumps can be used in a wide range of climates due to the inverter-driven motors improving system efficiencies. These components are suitable for various applications such as energy management, security systems, HVAC systems, smoke detectors, and IoT-controlled appliances. Littelfuse offers protect, control, and sense technologies to improve buildings' reliability, safety, and energy efficiency.

Smart Thermostat Solutions

Littelfuse Smart Thermostat Solutions components allow designers to implement Internet of Things (IoT) solutions to boost energy efficiency and monitor energy usage. Littelfuse Smart Thermostat solutions complement other Smart Building features, including safety and security systems.

Smart Metering Solutions

Littelfuse Smart Metering Solutions help designers implement more reliable and safer smart meters. Littelfuse solutions for smart meters allow designers to bring Internet of Things technology to the key functions of a smart metering system.

Electrical Vehicle DC Fast Chargers

DC charging stations are designed to convert the electrical grid’s AC power into DC power that can then be fed directly into a vehicle’s battery system for fast charging – in 30 minutes or less. Because the conversion from AC to DC power is being done in the charging station, these units can provide higher levels of power (50kW to 350kW and beyond) to the vehicle compared to AC charging stations. Working with tens to hundreds of kilowatts of power, efficient conversion, reliability of the system, and user safety are critical.

Portable Medical Devices & Connected Drug Delivery

Littelfuse Portable Medical Devices and Connected Drug Delivery Systems feature a range of products ideal for use in wearables, digital hearing aids, insulin pumps, blood pressure monitors, and connected pharmaceutical delivery devices such as auto-injectors and inhalers. Portable and connected devices are changing how medical services are delivered to patients. These connected healthcare products from Littelfuse help lower healthcare costs, improve efficiency, and empower patients.

In Stock: 1 884

Stock:
1 884
Can Dispatch Immediately
On Order:
20 000
Expected 03/08/2026
35 000
Expected 07/12/2026
Factory Lead Time:
26
Weeks Estimated factory production time for quantities greater than shown.
Long lead time reported on this product.
Minimum: 1   Multiples: 1
Unit Price:
-,-- €
Ext. Price:
-,-- €
Est. Tariff:
Packaging:
Full Reel (Order in multiples of 5000)

Pricing (EUR)

Qty. Unit Price
Ext. Price
Cut Tape / MouseReel™ †
0,396 € 0,40 €
0,247 € 2,47 €
0,153 € 15,30 €
0,116 € 58,00 €
0,094 € 94,00 €
0,084 € 210,00 €
Full Reel (Order in multiples of 5000)
0,068 € 340,00 €
0,065 € 650,00 €
† A MouseReel™ fee of 5,00 € will be added and calculated in your basket. All MouseReel™ orders are non-cancellable and non-returnable. ↩

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