SMCJ10C-E3/9AT Equivalent & Substitute Parts

Part Overview

The SMCJ10C-E3/9AT is a transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, designed for general-purpose overvoltage protection in surface-mount applications. This component features a 10V reverse standoff voltage with an 18.8V maximum clamping voltage and 79.8A peak pulse current capability in a DO-214AB (SMC) package. The part is currently listed as obsolete, making equivalent substitutes necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Reverse Standoff Voltage (Typ)	10V
Breakdown Voltage (Min)	11.1V
Clamping Voltage (Max) @ Ipp	18.8V
Peak Pulse Current (10/1000µs)	79.8A
Peak Pulse Power	1500W
Package Type	DO-214AB (SMC)
Mounting Type	Surface Mount
Operating Temperature Range	-55°C to 150°C
Bidirectional Channels	1
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the SMCJ10C-E3/9AT is determined by the following critical parameters:

Electrical Compatibility Requirements:

Reverse standoff voltage: 10V (Typ)
Breakdown voltage minimum: 11.1V
Package/case: DO-214AB or SMC equivalent
Mounting type: Surface mount
Bidirectional channels: 1
Peak pulse power: 1500W

Acceptable Variation Ranges:

Clamping voltage: 17V to 18.8V (within design margin)
Peak pulse current: 79.8A to 88.3A (acceptable for protection function)
Operating temperature: -55°C to 175°C (extended range acceptable)

Substitute parts are grouped into two categories based on clamping voltage specification: parts matching the original 18.8V clamp specification, and parts with 17V clamp specification that maintain electrical protection function within the same voltage class.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Clamp Voltage (Max)	Peak Pulse Current	Operating Temp Range	Product Status	Packaging
SMCJ10C-E3/9AT	Vishay General Semiconductor	18.8V	79.8A	-55°C to 150°C	Obsolete	Tape & Reel
SMCJ10CA-E3/9AT	Vishay General Semiconductor	17V	88.2A	-55°C to 150°C	Active	Tape & Reel
SMCJ10CE3/TR13	Microchip Technology	18.8V	79.8A	-65°C to 150°C	Active	Tape & Reel
SMCJ10CA	Fairchild Semiconductor	17V	88.3A	-55°C to 150°C	Active	Bulk
SMCJ10CA-13-F	Diodes Incorporated	17V	88.2A	-55°C to 150°C	Active	Tape & Reel
SMCJ10CA-HR	Littelfuse Inc.	17V	88.3A	-65°C to 150°C	Active	Tape & Reel
SMCJ10CA-HRA	Littelfuse	17V	88.3A	-65°C to 150°C	Active	Tape & Reel
SMCJ10CA-HRAT7	Littelfuse	17V	88.3A	-65°C to 150°C	Active	Tape & Reel
SMCJ10CA-TP	Micro Commercial Co	17V	88.3A	-55°C to 175°C	Active	Tape & Reel

Engineering Selection Recommendations

Primary Recommendation - Exact Electrical Match: SMCJ10CE3/TR13 (Microchip Technology) provides the closest electrical specification match with 18.8V clamping voltage and 79.8A peak pulse current identical to the original part. This part is active status with ROHS3 compliance and extended operating temperature range (-65°C to 150°C).

Secondary Recommendation - Active Equivalent with Reduced Clamp Voltage: SMCJ10CA-E3/9AT (Vishay General Semiconductor) maintains the same manufacturer and packaging format as the original obsolete part. The 17V clamping voltage represents a 1.8V reduction from the original specification but remains within acceptable protection parameters for the 10V standoff voltage class. This part is active status with identical temperature range.

Alternative Selections - Extended Temperature Range: SMCJ10CA-HR, SMCJ10CA-HRA, and SMCJ10CA-HRAT7 (Littelfuse Inc.) offer extended operating temperature to -65°C and are available in tape & reel packaging. These parts feature 17V clamping voltage and 88.3A peak pulse current.

High-Volume Availability Option: SMCJ10CA-TP (Micro Commercial Co) provides the highest inventory availability (4054 pcs) with extended upper operating temperature to 175°C. This part meets all electrical requirements with 17V clamping voltage and 88.3A peak pulse current.

All recommended substitutes maintain ROHS3 compliance, MSL Level 1 rating, and identical package/case specifications (DO-214AB, SMC).

Frequently Asked Questions (FAQ)

Q: Can SMCJ10CA-E3/9AT replace SMCJ10C-E3/9AT directly? A: Yes. Both parts share identical reverse standoff voltage (10V), breakdown voltage (11.1V), and operating temperature range (-55°C to 150°C). The clamping voltage differs by 1.8V (17V vs 18.8V), which remains within acceptable protection margins for this voltage class. Both are Vishay products in tape & reel packaging.

Q: What is the difference between 17V and 18.8V clamping voltage specifications? A: Clamping voltage is the maximum voltage the TVS diode will clamp to during a transient event. The 1.8V difference represents tighter voltage regulation in the 17V variants. Both specifications protect circuits designed for 10V standoff operation. Selection depends on circuit margin requirements.

Q: Are Littelfuse SMCJ10CA-HR and SMCJ10CA-HRA interchangeable? A: Yes. Both Littelfuse parts feature identical electrical specifications (17V clamp, 88.3A peak current, -65°C to 150°C operating range) and DO-214AB packaging. The -HRA and -HRAT7 designations indicate different manufacturing date codes or tape configurations but maintain equivalent performance.

Q: Does packaging format (Tape & Reel vs Bulk) affect electrical performance? A: No. Packaging format affects only handling, storage, and assembly processes. SMCJ10CA (Fairchild, Bulk) and SMCJ10CA-TP (Micro Commercial, Tape & Reel) provide identical electrical performance. Selection depends on assembly line requirements.

Q: Can I use SMCJ10CA-TP with its extended temperature range (-55°C to 175°C) in place of the original part? A: Yes. Extended temperature range provides additional design margin and does not compromise performance at the original operating range (-55°C to 150°C). This substitution is suitable for applications requiring higher temperature capability.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating, matching the original part's environmental certifications.

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