SMC30J40A The SMC30J40A is a 3000W unidirectional TVS diode from STMicroelectronics. It features a 40V reverse standoff voltage and 64.5V clamping voltage, packaged in a surface-mount DO-214AB (SMC) case.
Mfr Part #:

SMC30J40A

Available from 1 distributors
Mfr Name: STMicroelectronics
STMicroelectronics
The SMC30J40A is a 3000W unidirectional TVS diode from STMicroelectronics. It features a 40V reverse standoff voltage and 64.5V clamping voltage, packaged in a surface-mount DO-214AB (SMC) case.
Total Stock: 7,500 pcs
$ Price Range: $0.50 - $1.27

SMC30J40A Available from 1 distributor

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7,500 pcs
7500 pcs On Request 1 On Request On Request On Request On Request On Request

SMC30J40A Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Applications
Current
Mounting Type
Operating Temperature
Power
Power Line Protection
Supplier Device Package
Tape & Reel
Type
Unidirectional Channels
Voltage
Voltage - Breakdown (Min)
Voltage - Reverse Standoff (Typ)

SMC30J40A Description

Short technical summary and product information.

The SMC30J40A is a unidirectional Zener-type TVS diode designed for general-purpose transient voltage suppression. It offers a peak pulse power dissipation of 3000W (10/1000µs waveform) and a clamping voltage of 64.5V at a peak pulse current of 43.5A. The device has a reverse standoff voltage of 40V and a minimum breakdown voltage of 44.4V, providing reliable overvoltage protection for sensitive electronics.

 

This component does not include power line protection and is intended for single-channel unidirectional applications. The operating junction temperature range spans from -55°C to +175°C, allowing use in demanding thermal environments.

 

The SMC30J40A is housed in a standard DO-214AB (SMC) package and supports surface mount assembly. The supplier device package is SMC, facilitating automated pick-and-place manufacturing.

SMC30J40A Quick Information

Product Type: TVS Diode
Canonical Name: STMicroelectronics SMC30J40A TVS Diode
Subcategory: Zener Clamping Diode

SMC30J40A Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

SMC30J40A Estimated Pricing

Qty Low High
1+ $1.27 $1.27
10+ $1.03 $1.03
100+ $0.80 $0.80
500+ $0.66 $0.66
1,000+ $0.57 $0.57
2,500+ $0.52 $0.52
5,000+ $0.50 $0.50

Estimated market price range - modelled values for guidance only, not live distributor offers.

SMC30J40A Features

  • 3000W peak pulse power dissipation (10/1000µs)
  • 64.5V clamping voltage at 43.5A peak pulse current
  • 40V reverse standoff voltage, 44.4V minimum breakdown
  • Single unidirectional channel, Zener clamping type
  • Surface-mount DO-214AB (SMC) package, -55°C to 175°C operation

SMC30J40A Applications

  • General-purpose transient overvoltage suppression
  • Protection of downstream electronics from ESD and surge events
  • Used in power supply rail clamping circuits
  • Suitable for automotive and industrial control systems

SMC30J40A FAQs

6 frequently asked questions generated from this part’s specifications.
What is the reverse standoff voltage of the SMC30J40A?

The reverse standoff voltage is 40V.

What is the clamping voltage of this TVS diode?

The maximum clamping voltage is 64.5V at the rated peak pulse current.

What peak pulse power rating does the SMC30J40A have?

The device is rated for 3000W (3kW) peak pulse power under a 10/1000µs waveform.

What is the operating temperature range of the SMC30J40A?

The operating junction temperature range is -55°C to 175°C.

What package is the SMC30J40A available in?

It comes in a DO-214AB (SMC) surface-mount package.

Is the SMC30J40A a unidirectional or bidirectional device?

It is a unidirectional device with 1 channel. Power line protection is not supported.

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