SMCJ6.5C-E3/9AT Equivalent & Substitute Parts

Part Overview

The SMCJ6.5C-E3/9AT is a transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This bidirectional Zener diode is designed for general-purpose transient voltage protection in surface-mount applications using the DO-214AB (SMC) package. The part is currently obsolete, making equivalent substitutes necessary for ongoing design support and component procurement.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	6.5V
Voltage - Breakdown (Min)	7.22V
Voltage - Clamping (Max) @ Ipp	12.3V
Current - Peak Pulse (10/1000µs)	122A
Power - Peak Pulse	1500W
Bidirectional Channels	1
Type	Zener
Mounting Type	Surface Mount
Package / Case	DO-214AB, SMC
Operating Temperature	-55°C ~ 150°C (TJ)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the SMCJ6.5C-E3/9AT is determined by the following critical parameters:

Voltage - Reverse Standoff: 6.5V (exact match required)
Voltage - Breakdown (Min): 7.22V (exact match required)
Bidirectional Channels: 1 (exact match required)
Package / Case: DO-214AB, SMC (exact match required)
Mounting Type: Surface Mount (exact match required)

Substitute parts are grouped into two categories based on peak pulse current and power dissipation:

Category A (1500W, 122-134A): Direct electrical equivalents with identical power ratings and comparable peak pulse currents. These parts maintain the same thermal and electrical performance envelope as the original SMCJ6.5C-E3/9AT.

Category B (3000W, 267.9A): Higher power-rated alternatives with doubled power dissipation capability and approximately double the peak pulse current. These parts provide enhanced transient protection but operate at different thermal characteristics.

Parameter Comparison

Part Number	Manufacturer	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Operating Temperature	Product Status	Packaging
SMCJ6.5C-E3/9AT	Vishay General Semiconductor	12.3V	122A	1500W	-55°C ~ 150°C	Obsolete	Bulk
SMCJ6.5CA-E3/9AT	Vishay General Semiconductor	11.2V	133.9A	1500W	-55°C ~ 150°C	Active	Tape & Reel
SMCJ6.5CE3/TR13	Microchip Technology	12.3V	122A	1500W	-65°C ~ 150°C	Active	Tape & Reel
SMCJ6.5CA	EVVO Semi	11.2V	134A	1500W	-55°C ~ 150°C	Active	Cut Tape & Digi-Reel
SMCJ6.5CA-13-F	Diodes Incorporated	11.2V	133.9A	1500W	-55°C ~ 150°C	Active	Tape & Reel
SMCJ6.5CA-TP	Micro Commercial Co	11.2V	134A	1500W	-55°C ~ 175°C	Active	Tape & Reel
SMCJ6.5CAE3/TR13	Microchip Technology	11.2V	133.9A	1500W	-65°C ~ 150°C	Active	Tape & Reel
SMCJ6V5CA	Taiwan Semiconductor Corporation	11.2V	133.9A	1500W	Not specified	Active	Tape & Reel
SMDJ6.5CA	Alpha & Omega Semiconductor Inc.	11.2V	267.9A	3000W	-55°C ~ 150°C	Active	Tape & Reel
SMDJ6.5CA-T7	Littelfuse Inc.	11.2V	267.9A	3000W	-65°C ~ 150°C	Active	Tape & Reel
SMLJ6.5CA	Bourns Inc.	11.2V	267.9A	3000W	-55°C ~ 150°C	Active	Tape & Reel

Engineering Selection Recommendations

Primary Recommendation (1500W Category):

SMCJ6.5CE3/TR13 (Microchip Technology) provides the closest electrical match to the original SMCJ6.5C-E3/9AT with identical clamping voltage (12.3V) and peak pulse current (122A). This part is active, ROHS3 compliant, and extends the operating temperature range to -65°C, offering improved thermal margin for demanding applications.

Alternative Recommendations (1500W Category):

SMCJ6.5CA-E3/9AT (Vishay General Semiconductor) maintains the same manufacturer lineage as the original part. While clamping voltage is reduced to 11.2V and peak pulse current increased to 133.9A, these parameters remain within the functional envelope for 6.5V protection circuits. This part is active and available in high volume.

SMCJ6.5CA-TP (Micro Commercial Co) offers the widest operating temperature range (-55°C ~ 175°C) among 1500W alternatives, suitable for applications requiring extended thermal performance. Peak pulse current is 134A with 11.2V clamping voltage.

Higher Power Alternative (3000W Category):

SMDJ6.5CA (Alpha & Omega Semiconductor Inc.) and SMLJ6.5CA (Bourns Inc.) provide doubled power dissipation (3000W) with doubled peak pulse current (267.9A). These parts are suitable for applications requiring enhanced transient suppression but require thermal design verification due to increased power handling.

All recommended substitutes are ROHS3 compliant, MSL 1 rated, and available in active production status.

Frequently Asked Questions (FAQ)

Q: Can SMCJ6.5C-E3/9AT be directly replaced with SMCJ6.5CA-E3/9AT?

A: Yes. Both parts share the same 6.5V reverse standoff voltage, 7.22V breakdown voltage, and DO-214AB package. The clamping voltage differs (12.3V vs 11.2V) and peak pulse current increases (122A vs 133.9A), but both operate within the 1500W power envelope. SMCJ6.5CA-E3/9AT is active production, making it the preferred substitute.

Q: What is the difference between 1500W and 3000W rated parts?

A: Power rating reflects peak pulse power dissipation capability. 3000W parts (SMDJ and SMLJ series) handle double the transient energy compared to 1500W parts (SMCJ series). Selection depends on circuit transient severity. Higher power parts require thermal design consideration but provide enhanced protection margin.

Q: Are all substitutes compatible with the original PCB footprint?

A: All listed substitutes use the DO-214AB (SMC) surface-mount package, maintaining identical PCB footprint compatibility. Packaging format (bulk, tape & reel, cut tape) does not affect component placement or soldering.

Q: Does operating temperature range affect substitution?

A: Operating temperature range affects application suitability but not electrical substitution. The original part specifies -55°C ~ 150°C. Alternatives with extended ranges (-65°C or -55°C ~ 175°C) provide additional margin for extreme environment applications. Parts with narrower ranges require application temperature verification.

Q: What is the significance of clamping voltage variation (11.2V vs 12.3V)?

A: Clamping voltage determines the maximum voltage the TVS diode allows across the protected circuit during transient events. Lower clamping voltage (11.2V) provides tighter protection but may increase leakage current. Higher clamping voltage (12.3V) reduces leakage but allows slightly higher transient voltage. Selection depends on protected circuit voltage tolerance specifications.

Q: Are Microchip Technology parts (SMCJ6.5CE3/TR13, SMCJ6.5CAE3/TR13) interchangeable?

A: Both Microchip parts maintain 6.5V standoff and 7.22V breakdown specifications. SMCJ6.5CE3/TR13 provides 12.3V clamping (matching original), while SMCJ6.5CAE3/TR13 provides 11.2V clamping. Selection depends on clamping voltage requirement. Both extend operating temperature to -65°C.

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