SMAJ100C Equivalent & Substitute Parts

Part Overview

The SMAJ100C is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component features a 100V reverse standoff voltage with a 170.1V maximum clamping voltage and 2.5A peak pulse current capability in a DO-214AC (SMA) package.

The SMAJ100C is classified as obsolete. Equivalent and substitute parts listed below provide active alternatives with compatible electrical and mechanical specifications suitable for direct replacement in circuit designs requiring 100V standoff voltage protection.

Key Parameters

Parameter	SMAJ100C
Voltage - Reverse Standoff (Typ)	100V
Voltage - Breakdown (Min)	105.3V
Voltage - Clamping (Max) @ Ipp	170.1V
Current - Peak Pulse (10/1000µs)	2.5A
Power - Peak Pulse	400W
Package / Case	DO-214AC, SMA
Operating Temperature	-65°C ~ 150°C (TJ)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the SMAJ100C are qualified based on the following electrical and mechanical parameters:

Voltage - Reverse Standoff (Typ): 100V
Voltage - Clamping (Max) @ Ipp: 162V to 179V range
Current - Peak Pulse (10/1000µs): 2.47A to 3.1A
Package / Case: DO-214AC, SMA
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

All substitute parts maintain the same 100V standoff voltage specification and DO-214AC (SMA) package footprint. Clamping voltage variations (162V to 179V) and peak pulse current variations (2.47A to 3.1A) remain within acceptable operating ranges for general-purpose transient voltage suppression applications.

Parameter Comparison

Parameter	SMAJ100C (Littelfuse)	SMAJ100CA (MDD)	SMAJ100CA-13-F (Diodes Inc.)	SMAJ100CA-TP (Micro Commercial)	SMAJ100CAE3/TR13 (Microchip)	SMAJ100CE3/TR13 (Microchip)	TV04A101JB-G (Comchip)
Voltage - Reverse Standoff (Typ)	100V	100V	100V	100V	100V	100V	100V
Voltage - Breakdown (Min)	105.3V	111V	111V	111V	111V	111V	111V
Voltage - Clamping (Max) @ Ipp	170.1V	162V	162V	162V	162V	179V	162V
Current - Peak Pulse (10/1000µs)	2.5A	2.5A	2.5A	2.5A	3.1A	2.8A	2.47A
Power - Peak Pulse	400W	400W	400W	400W	500W	500W	400W
Package / Case	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMA
Operating Temperature	-65°C ~ 150°C (TJ)	-50°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)	-55°C ~ 175°C (TA)	-65°C ~ 150°C (TJ)	-65°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Obsolete	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All substitute parts listed are active products with ROHS3 compliance and MSL 1 rating, making them suitable for direct replacement of the obsolete SMAJ100C in new designs and production environments.

SMAJ100CA (MDD) and SMAJ100CA-13-F (Diodes Incorporated) provide standard 2.5A peak pulse current matching the original specification with 162V clamping voltage. SMAJ100CA-13-F offers the widest temperature range support (-55°C to 150°C) and highest inventory availability (435,100 units).

SMAJ100CAE3/TR13 (Microchip Technology) and SMAJ100CE3/TR13 (Microchip Technology) provide enhanced specifications with 3.1A and 2.8A peak pulse current respectively, and 500W peak pulse power rating, supporting applications requiring higher transient energy dissipation.

SMAJ100CA-TP (Micro Commercial Co) extends the upper operating temperature to 175°C (TA), suitable for high-temperature environments.

TV04A101JB-G (Comchip Technology) provides equivalent performance with 2.47A peak pulse current and 162V clamping voltage.

Frequently Asked Questions (FAQ)

Q: Can SMAJ100CA substitute for SMAJ100C in existing designs?

A: Yes. Both parts share identical 100V reverse standoff voltage, DO-214AC (SMA) package footprint, and general-purpose TVS diode functionality. The 162V clamping voltage of SMAJ100CA is within acceptable operating parameters for applications designed for the SMAJ100C's 170.1V specification.

Q: What is the difference between SMAJ100CAE3/TR13 and SMAJ100CA-13-F?

A: Both are active alternatives with 100V standoff voltage and DO-214AC (SMA) packaging. SMAJ100CAE3/TR13 (Microchip) provides 3.1A peak pulse current and 500W peak pulse power. SMAJ100CA-13-F (Diodes Incorporated) provides 2.5A peak pulse current and 400W peak pulse power. Selection depends on transient energy requirements in the application.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed carry ROHS3 compliance certification and MSL 1 (Unlimited) moisture sensitivity rating, meeting environmental and reliability standards for industrial and commercial applications.

Q: Does operating temperature range affect substitution compatibility?

A: Operating temperature ranges vary among substitutes. SMAJ100C operates -65°C to 150°C (TJ). SMAJ100CA-TP extends to 175°C (TA). Selection should match application temperature requirements. For standard -65°C to 150°C range, SMAJ100CAE3/TR13 and SMAJ100CE3/TR13 maintain identical specifications to the original part.

Q: What packaging options are available for these substitutes?

A: All substitute parts use DO-214AC (SMA) surface-mount package with identical footprint to SMAJ100C. Packaging format options include bulk and Tape & Reel (TR) configurations depending on manufacturer and part number variant.

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