Mfr Part #:

SMAJ85A

SMAJ85A is a 400W unidirectional TVS diode from Littelfuse with 85V reverse standoff voltage and 137V clamping voltage. It is housed in a surface mount DO-214AC (SMA) package.

✓ Total Stock: 504 pcs

$ Price Range: $0.06 - $0.48

SMAJ85A Available from 1 distributor

✓ Authorised

✓ Non-Authorised

Distributor		Stock	Pricing	MOQ	PKG	Lead Time	Date Code	On Order Quantity	On Order Delivery
Bristol Electronics ✓ Non-Authorised Inventory information	504 pcs On Request	504 pcs	On Request	1	On Request	On Request	On Request	On Request	On Request

SMAJ85A Description

Short technical summary and product information.

The SMAJ85A is a 400W unidirectional TVS diode from Littelfuse, designed to protect sensitive electronic equipment from voltage transients. It features a Zener breakdown mechanism and is part of the SMAJ series of surface mount TVS diodes.

With a reverse standoff voltage of 85V and a clamping voltage of 137V at a peak pulse current of 2.9A (10/1000µs waveform), it provides robust transient suppression. The device offers a peak pulse power dissipation of 400W and operates over a junction temperature range of -65°C to 150°C.

The SMAJ series incorporates features such as IEC-61000-4-2 ESD protection up to 30kV air and contact discharge, and IEC-61000-4-4 EFT protection. The fast response time (typically less than 1.0ps) ensures minimal stress on protected circuits. Typical applications include I/O interfaces, VCC bus, and other vulnerable circuits in telecom, computer, industrial, and consumer electronics.

The device is housed in a surface mount DO-214AC (SMA) package, which allows for compact PCB layout and low profile design. It is supplied in tape and reel packaging for automated assembly.

SMAJ85A Quick Information

Product Type: TVS Diode

Series: SMAJ

Canonical Name: TVS Diode, Unidirectional, 85V Reverse Standoff, 137V Clamping, DO-214AC (SMA)

Subcategory: Unidirectional TVS Diodes

SMAJ85A Compliance

RoHS Status: RoHS Compliant

Moisture Sensitivity Level (MSL): 1 Unlimited

REACH Status: Non-Compliant

Lead Free: Yes

SMAJ85A Estimated Pricing

Qty	Low	High
1+	$0.48	$0.48
10+	$0.30	$0.30
100+	$0.19	$0.19
500+	$0.14	$0.14
1,000+	$0.12	$0.12
2,000+	$0.11	$0.11
5,000+	$0.08	$0.08
10,000+	$0.07	$0.07
15,000+	$0.07	$0.07
25,000+	$0.07	$0.07
35,000+	$0.06	$0.06

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

SMAJ85A Features

400W peak pulse power dissipation capability.
85V reverse standoff voltage rating.
137V clamping voltage at 2.9A.
Unidirectional Zener TVS diode design.
Surface mount DO-214AC package.

SMAJ85A Applications

Protects I/O interfaces from voltage transients.
Safeguards VCC bus in electronic circuits.
Used in telecom equipment protection.
Ideal for industrial electronic applications.
Provides ESD protection for data lines.

SMAJ85A FAQs

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

What is the reverse standoff voltage of SMAJ85A?

85V.

What is the clamping voltage of SMAJ85A?

137V.

What is the peak pulse current rating?

2.9A.

What package is SMAJ85A available in?

DO-214AC (SMA) surface mount package.

What is the peak pulse power rating?

400W.

Is SMAJ85A unidirectional or bidirectional?

Unidirectional.

What is the operating temperature range?

-65°C to 150°C.

Category	TVS - Diodes
Manufacturer Name	Littelfuse Inc.
Applications	General Purpose
Current	2.9 A
Direction	Unidirectional
Halogen Free	Yes
Mounting Type	Surface Mount
Operating Temperature	-65°C ~ 150°C (TJ)
Power	400 W
Power Line Protection	No
Storage Temperature	-65°C ~ 175°C
Supplier Device Package	DO-214AC (SMA)
Tape & Reel	Yes
Type	Zener
Unidirectional Channels	1
Voltage	137 V