SMBJ6.5C-E3/5B Equivalent & Substitute Parts

Part Overview

The SMBJ6.5C-E3/5B is a transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This bidirectional Zener diode operates in the DO-214AA (SMB) package and is designed for general-purpose overvoltage protection applications. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and 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)	48.8A
Power - Peak Pulse	600W
Operating Temperature Range	-55°C ~ 150°C (TJ)
Package / Case	DO-214AA, SMB
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the SMBJ6.5C-E3/5B is determined by the following critical parameters:

Voltage - Reverse Standoff (Typ): 6.5V
Voltage - Breakdown (Min): 7.22V
Package / Case: DO-214AA, SMB
Mounting Type: Surface Mount
Bidirectional Channels: 1
Type: Zener

Substitute parts are grouped into two categories based on voltage clamping characteristics:

Category A - Lower Clamping Voltage (11.2V): Parts with reduced clamping voltage compared to the original specification. These provide tighter voltage regulation and are suitable for applications where lower transient peaks are acceptable.

Category B - Matching Clamping Voltage (12.3V): Parts that maintain the original 12.3V clamping specification, providing direct functional equivalence.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse	Operating Temperature	Product Status
SMBJ6.5C-E3/5B	Vishay General Semiconductor	6.5V	7.22V	12.3V	48.8A	-55°C ~ 150°C	Obsolete
SMBJ6.5CA-E3/5B	Vishay General Semiconductor	6.5V	7.22V	11.2V	53.6A	-55°C ~ 150°C	Active
SMBJ6.5CA-HRA	Littelfuse	6.5V	7.22V	11.2V	53.6A	-65°C ~ 150°C	Active
1SMB6.5CA TR13 PBFREE	Central Semiconductor Corp	6.5V	7.22V	11.2V	53.6A	-65°C ~ 150°C	Active
SMBJ6.5CA	EVVO Semi	6.5V	7.22V	11.2V	53.6A	-65°C ~ 150°C	Active
SMBJ6.5CA-13-F	Diodes Incorporated	6.5V	7.22V	11.2V	53.6A	-55°C ~ 150°C	Active
SMBJ6.5CA-TP	Micro Commercial Co	6.5V	7.22V	11.2V	53.6A	-55°C ~ 175°C	Active
SMBJ6.5CA-TR	STMicroelectronics	6.5V	7.2V	11.2V	56A	-55°C ~ 150°C	Active
SMBJ6.5CAE3/TR13	Microchip Technology	6.5V	7.22V	11.2V	53.6A	-65°C ~ 150°C	Active
SMBJ6.5CE3/TR13	Microchip Technology	6.5V	7.22V	12.3V	48.7A	-65°C ~ 150°C	Active

Engineering Selection Recommendations

Direct Replacement (Matching Clamping Voltage):

SMBJ6.5CE3/TR13 (Microchip Technology) provides the closest functional match with identical 12.3V clamping voltage and 48.7A peak pulse current. This part maintains the original voltage regulation characteristics and is classified as active with extended temperature range (-65°C ~ 150°C). All compliance certifications (ROHS3, REACH Unaffected, EAR99) align with the original specification.

Primary Substitutes (Lower Clamping Voltage):

SMBJ6.5CA-E3/5B (Vishay General Semiconductor), SMBJ6.5CA-13-F (Diodes Incorporated), and SMBJ6.5CA-TP (Micro Commercial Co) are active alternatives with 11.2V clamping voltage. These parts are suitable for applications where slightly lower transient voltage peaks are acceptable. All maintain the same reverse standoff voltage (6.5V), breakdown voltage (7.22V), and package specifications. SMBJ6.5CA-TP offers extended operating temperature to 175°C.

Extended Temperature Range Options:

SMBJ6.5CA-HRA (Littelfuse), 1SMB6.5CA TR13 PBFREE (Central Semiconductor Corp), SMBJ6.5CA (EVVO Semi), and SMBJ6.5CAE3/TR13 (Microchip Technology) all support -65°C minimum operating temperature, providing enhanced cold-temperature performance compared to the original -55°C specification.

High-Volume Availability:

SMBJ6.5CA (EVVO Semi) offers the highest inventory level (146,145 pcs) among all substitutes, ensuring supply chain continuity for production applications.

Frequently Asked Questions (FAQ)

Q: Can SMBJ6.5CA-E3/5B replace SMBJ6.5C-E3/5B directly?

A: SMBJ6.5CA-E3/5B is a functional substitute with the same reverse standoff voltage (6.5V), breakdown voltage (7.22V), and package (DO-214AA SMB). The primary difference is reduced clamping voltage (11.2V vs. 12.3V) and increased peak pulse current (53.6A vs. 48.8A). This substitution is valid for applications where the lower clamping voltage is acceptable.

Q: What is the difference between 11.2V and 12.3V clamping voltage?

A: Clamping voltage determines the maximum transient voltage that appears across the protected circuit during a surge event. The 11.2V clamping parts provide tighter voltage regulation, limiting transient peaks to lower levels. The 12.3V clamping parts allow slightly higher transient peaks. Selection depends on the protected circuit's voltage tolerance specifications.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant and REACH unaffected, matching the original part's environmental compliance status.

Q: Does package type affect substitution?

A: All listed parts use the DO-214AA (SMB) surface mount package with identical pinout and footprint. Package compatibility is maintained across all substitutes.

Q: Which substitute offers the best temperature performance?

A: SMBJ6.5CA-TP (Micro Commercial Co) supports the widest operating temperature range (-55°C ~ 175°C), providing 25°C additional high-temperature capability compared to most alternatives.

Q: Is SMBJ6.5CE3/TR13 a direct replacement?

A: SMBJ6.5CE3/TR13 (Microchip Technology) maintains the original 12.3V clamping voltage and is the closest functional equivalent. It is active, fully compliant, and offers extended temperature range (-65°C minimum vs. -55°C original).

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