1SMB18AT3 Unidirectional 600W TVS diode from onsemi with 18V reverse standoff voltage and 29.2V clamping voltage in a SMB (DO-214AA) surface mount package.
Mfr Part #:

1SMB18AT3

Available from 2 distributors
Mfr Name: On Semiconductor
On Semiconductor
Unidirectional 600W TVS diode from onsemi with 18V reverse standoff voltage and 29.2V clamping voltage in a SMB (DO-214AA) surface mount package.
Total Stock: 2,471 pcs

1SMB18AT3 Available from 2 distributors

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Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Non-Authorised Inventory information
2,295 pcs
2295 pcs On Request 1 On Request On Request On Request On Request On Request
Non-Authorised Inventory information
176 pcs
176 pcs On Request 1 On Request On Request NO DC On Request On Request

1SMB18AT3 Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Breakdown Voltage (V_BR)
Clamping Voltage (V_C)
ESD Rating
Forward Surge Current (I_FSM)
Junction to Ambient Thermal Resistance
Junction to Lead Thermal Resistance
Lead Style
Maximum Case Temperature for Soldering
Medical Grade
Mounting Position
Mounting Type
Operating Temperature Range
Package / Case
Peak Pulse Current (I_PP)
Peak Pulse Power (P_PP)
Polarity
Response Time
Reverse Standoff Voltage (V_RWM)
Standard Package Quantity
Storage Temperature
Storage Temperature Range
Tape & Reel
Termination Style
Type
Unidirectional

1SMB18AT3 Description

Short technical summary and product information.

The 1SMB18AT3 is a 600 watt peak power unidirectional Zener transient voltage suppressor from onsemi (ON Semiconductor) designed to protect voltage-sensitive electronic components from high-voltage transients. Key electrical parameters include a reverse standoff voltage of 18V, a breakdown voltage range of 20.0V to 22.1V, and a maximum clamping voltage of 29.2V at the peak pulse current. The device delivers a peak pulse power of 600W for a 1.0 ms pulse width and features an ESD rating of Class 3 (>16 kV) per the Human Body Model, with a typical response time of less than 1 ns.

 

The part is housed in a void-free, transfer-molded SMB (DO-214AA) plastic package with modified L-bend leads that provide increased contact area to bond pads. It supports surface mount soldering with a maximum case temperature of 260°C for 10 seconds. The unidirectional polarity is indicated by a cathode band. The 1SMB18AT3 is suited for use in communication systems, automotive electronics, power supplies, industrial controls, and other equipment requiring robust transient protection.

1SMB18AT3 Quick Information

Product Type: TVS Diode
Series: 1SMB5.0AT3 Series
Canonical Name: 1SMB18AT3 — Unidirectional 600W TVS Diode, 18V Reverse Standoff Voltage, SMB Package
Subcategory: Unidirectional Transient Voltage Suppressor

1SMB18AT3 Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected
Lead Free: No

1SMB18AT3 Features

  • 600W peak pulse power at 1.0 ms.
  • 18V reverse standoff voltage.
  • ESD rating Class 3 (>16 kV) HBM.
  • Response time typically less than 1 ns.
  • Surface mount SMB (DO-214AA) package.

1SMB18AT3 Applications

  • Used in communication systems transient protection.
  • Ideal for automotive electronic control units.
  • Protects power supply circuits from voltage spikes.
  • Suitable for industrial process control equipment.
  • Employed in consumer electronics overvoltage protection.

1SMB18AT3 FAQs

6 frequently asked questions generated from this part’s specifications.
What is the reverse standoff voltage of the 1SMB18AT3?

The reverse standoff voltage (V_RWM) is 18 V.

What is the peak pulse power rating?

The peak pulse power (P_PP) is 600 W at 1.0 ms pulse width.

What is the clamping voltage for this TVS diode?

The maximum clamping voltage (V_C) is 29.2 V at peak pulse current.

What package does the 1SMB18AT3 come in?

The device is offered in a surface mount SMB (DO-214AA) package.

Is the 1SMB18AT3 unidirectional or bidirectional?

It is a unidirectional TVS diode, with cathode indicated by a polarity band.

What is the operating temperature range?

The operating temperature range is -65°C to +150°C.

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