SMCJ7.5C Transient Voltage Suppressor Equivalent & Substitute Parts

Part Overview

The SMCJ7.5C is a bidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc. in DO-214AB surface mount package. This component is designed for general-purpose transient voltage suppression applications with a 7.5V reverse standoff voltage and 14.65V maximum clamping voltage at peak pulse current of 116.3A.

The SMCJ7.5C is classified as obsolete. Equivalent and substitute parts are available from multiple manufacturers with active product status, offering compatible electrical and mechanical characteristics suitable for direct replacement in circuit designs.

Key Parameters

Parameter	Value
Manufacturer Part Number	SMCJ7.5C
Manufacturer	Littelfuse Inc.
Product Category	Transient Voltage Suppressors (TVS)
Type	Zener
Bidirectional Channels	1
Voltage - Reverse Standoff (Typ)	7.5V
Voltage - Breakdown (Min)	7.89V
Voltage - Clamping (Max) @ Ipp	14.65V
Current - Peak Pulse (10/1000µs)	116.3A
Power - Peak Pulse	1500W
Operating Temperature Range	-55°C to 150°C (TJ)
Mounting Type	Surface Mount
Package / Case	DO-214AB, SMC
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the SMCJ7.5C are grouped based on the following critical parameters that determine functional compatibility:

Primary Substitution Criteria:

Voltage - Reverse Standoff (Typ): 7.5V
Voltage - Clamping (Max) @ Ipp: 12.9V to 14.3V range
Current - Peak Pulse (10/1000µs): 104.9A to 122A
Power - Peak Pulse: 1500W
Mounting Type: Surface Mount
Package / Case: DO-214AB, SMC
Type: Zener, Bidirectional, 1 Channel
Operating Temperature: -55°C minimum to 150°C maximum

Substitute parts maintain the same reverse standoff voltage (7.5V) and operate within compatible clamping voltage and peak pulse current ranges. All substitutes are surface mount devices in DO-214AB or SMC packages with active product status and current manufacturing availability.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Operating Temperature	Product Status
SMCJ7.5C	Littelfuse Inc.	7.5V	14.65V	116.3A	1500W	-55°C to 150°C	Obsolete
SMCJ7.5CA	Taiwan Semiconductor Corporation	7.5V	12.9V	122A	1500W	-55°C to 150°C	Active
SMCJ7.5CA-13-F	Diodes Incorporated	7.5V	12.9V	116.3A	1500W	-55°C to 150°C	Active
SMCJ7.5CA-TP	Micro Commercial Co	7.5V	12.9V	116.3A	1500W	-55°C to 175°C	Active
SMCJ7.5CAE3/TR13	Microchip Technology	7.5V	12.9V	116.3A	1500W	-65°C to 150°C	Active
SMCJ7.5CE3/TR13	Microchip Technology	7.5V	14.3V	104.9A	1500W	-65°C to 150°C	Active
SMCJ7V5CA	Fairchild Semiconductor	7.5V	12.9V	116.3A	1500W	Not specified	Active
SMLJ7.5CA	Bourns Inc.	7.5V	12.9V	232.6A	3000W	-55°C to 150°C	Active
SMLJ7.5CA-TP	Micro Commercial Co	7.5V	12.9V	232.6A	3000W	-55°C to 175°C	Active
SMLJ7.5CAE3/TR13	Microchip Technology	7.5V	12.9V	232.6A	3000W	-55°C to 150°C	Active

Engineering Selection Recommendations

Direct Electrical Equivalents (1500W Power Rating): SMCJ7.5CA, SMCJ7.5CA-13-F, SMCJ7.5CA-TP, SMCJ7.5CAE3/TR13, SMCJ7.5CE3/TR13, and SMCJ7V5CA maintain the same 1500W peak pulse power rating as the original SMCJ7.5C. These parts are suitable for applications requiring identical power dissipation characteristics. All are active products with ROHS3 compliance.

Higher Power Rating Alternatives (3000W Power Rating): SMLJ7.5CA, SMLJ7.5CA-TP, and SMLJ7.5CAE3/TR13 offer double the peak pulse power rating (3000W) while maintaining the same 7.5V reverse standoff voltage and 12.9V clamping voltage. These parts provide enhanced transient suppression capability and are suitable for applications with higher energy transient events. All are active products with ROHS3 compliance.

Temperature Range Considerations: SMCJ7.5CA-TP and SMLJ7.5CA-TP extend the operating temperature range to -55°C to 175°C, providing wider thermal operating margins. SMCJ7.5CAE3/TR13 and SMLJ7.5CAE3/TR13 extend the lower temperature limit to -65°C.

Clamping Voltage Variation: SMCJ7.5CE3/TR13 specifies a maximum clamping voltage of 14.3V compared to 12.9V in other substitutes, with correspondingly lower peak pulse current (104.9A). This part is suitable for applications where slightly higher clamping voltage is acceptable.

Frequently Asked Questions (FAQ)

Q: Can SMLJ series parts directly replace SMCJ series parts? A: SMLJ7.5CA, SMLJ7.5CA-TP, and SMLJ7.5CAE3/TR13 share the same 7.5V reverse standoff voltage and 12.9V clamping voltage as SMCJ equivalents but provide double the peak pulse power rating (3000W vs 1500W). They are pin-compatible in DO-214AB packages and can be used as direct replacements in applications where higher transient energy handling is beneficial or required.

Q: What is the difference between SMCJ7.5CA and SMCJ7.5CE3/TR13? A: Both parts maintain 7.5V reverse standoff voltage and 1500W power rating. SMCJ7.5CE3/TR13 specifies a maximum clamping voltage of 14.3V with peak pulse current of 104.9A, while SMCJ7.5CA specifies 12.9V clamping with 122A peak pulse current. SMCJ7.5CE3/TR13 also extends the lower operating temperature to -65°C.

Q: Are all substitute parts ROHS3 compliant? A: Most substitute parts listed are ROHS3 compliant. SMCJ7V5CA does not specify RoHS status in the provided data. Verify RoHS compliance requirements for your specific application before selection.

Q: What packaging options are available? A: All substitute parts use DO-214AB or SMC surface mount packages, maintaining mechanical compatibility with the original SMCJ7.5C. Packaging variants include Tape & Reel (TR) and Bulk options. Verify packaging requirements for your assembly process.

Q: Which substitute offers the widest operating temperature range? A: SMCJ7.5CA-TP and SMLJ7.5CA-TP both specify -55°C to 175°C operating temperature range, providing the widest thermal margin. SMCJ7.5CAE3/TR13 and SMLJ7.5CAE3/TR13 extend the lower limit to -65°C while maintaining 150°C upper limit.

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