Mfr Part #:

SMCJ43A

SMCJ43A is a 1500W unidirectional TVS diode from Littelfuse. It features a 43V reverse standoff voltage and 69.4V clamping voltage in a DO-214AB surface mount package.

✓ Total Stock: 158 pcs

$ Price Range: $0.16 - $0.94

SMCJ43A Available from 1 distributor

✓ Authorised

✓ Non-Authorised

Distributor		Stock	Pricing	MOQ	PKG	Lead Time	Date Code	On Order Quantity	On Order Delivery
Tomark Electronics Ltd ✓ Non-Authorised Inventory information	158 pcs On Request	158 pcs	On Request	1	On Request	On Request	On Request	On Request	On Request

SMCJ43A Description

Short technical summary and product information.

The SMCJ43A from Littelfuse is a 1500W unidirectional transient voltage suppression (TVS) diode designed to protect sensitive electronic equipment from voltage transients induced by lightning and other transient voltage events.

Electrical specifications include a reverse standoff voltage of 43V, a minimum breakdown voltage of 47.8V, and a maximum clamping voltage of 69.4V at a peak pulse current of 21.7A (10/1000μs waveform). The device offers excellent clamping capability with low incremental surge resistance and a typical reverse leakage current of less than 1μA when VBR min > 12V.

The SMCJ43A is housed in a DO-214AB (SMC) surface mount package, supporting operating temperatures from -55°C to 150°C. It is designed for surface mounted applications to optimize board space and features a low profile with built-in strain relief.

Per the Littelfuse datasheet, the device is RoHS compliant, halogen free, and meets MSL level 1. It provides ESD protection in accordance with IEC 61000-4-2 (30kV air/contact) and EFT protection per IEC 61000-4-4. The fast response time is typically less than 1.0ps from 0V to breakdown voltage.

SMCJ43A Quick Information

Product Type: TVS Diode

Series: SMCJ Series

Canonical Name: SMCJ43A TVS Diode

Subcategory: Unidirectional TVS Diode

SMCJ43A Compliance

RoHS Status: RoHS Compliant

Moisture Sensitivity Level (MSL): 1 Unlimited

REACH Status: Non-Compliant

Lead Free: Yes

SMCJ43A Estimated Pricing

Qty	Low	High
1+	$0.94	$0.94
10+	$0.58	$0.58
100+	$0.38	$0.38
500+	$0.29	$0.29
1,000+	$0.26	$0.26
3,000+	$0.19	$0.19
6,000+	$0.17	$0.17
9,000+	$0.16	$0.16
15,000+	$0.16	$0.16

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

SMCJ43A Features

1500W peak pulse power dissipation at 10/1000μs waveform.
43V reverse standoff voltage with 69.4V clamping.
Fast response time typically less than 1.0ps.
Surface mount DO-214AB package.
RoHS compliant and halogen free per datasheet.

SMCJ43A Applications

Protects I/O interfaces and VCC bus from transients.
Used in telecom, computer, industrial, and consumer electronics.
Suitable for ESD protection per IEC 61000-4-2.
Ideal for lightning-induced surge protection.

SMCJ43A FAQs

7 frequently asked questions generated from this part’s specifications.

What is the reverse standoff voltage of the SMCJ43A?

43 V.

What is the minimum breakdown voltage of the SMCJ43A?

47.8 V.

What is the maximum clamping voltage of the SMCJ43A?

69.4 V at 21.7 A peak pulse current.

What is the peak pulse current rating of the SMCJ43A?

21.7 A for a 10/1000μs waveform.

What package does the SMCJ43A come in?

DO-214AB (SMC) surface mount package.

What is the peak pulse power rating of the SMCJ43A?

1500 W.

Is the SMCJ43A unidirectional?

Yes, it has 1 unidirectional channel.

Category	TVS - Diodes
Manufacturer Name	Littelfuse Inc.
Applications	General Purpose
Current	21.7 A
Halogen Free	Yes
Mounting Type	Surface Mount
Operating Temperature	-55°C ~ 150°C (TJ)
Power	1500 W
Power Line Protection	No
Storage Temperature	-65°C ~ 175°C
Supplier Device Package	DO-214AB (SMCJ)
Type	Zener
Unidirectional Channels	1
Voltage	69.4 V