SMBJ6.5C Equivalent & Substitute Parts

Part Overview

The SMBJ6.5C is a transient voltage suppressor (TVS) diode manufactured by Littelfuse, designed for general-purpose overvoltage protection in surface-mount applications. This component features a 6.5V reverse standoff voltage with an 11.76V maximum clamping voltage and 53.6A peak pulse current capability in a DO-214AA (SMB) package. The SMBJ6.5C is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	SMBJ6.5C
Manufacturer	Littelfuse
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Voltage - Reverse Standoff (Typ)	6.5V
Voltage - Clamping (Max) @ Ipp	11.76V
Current - Peak Pulse (10/1000µs)	53.6A
Power - Peak Pulse	600W
Package / Case	DO-214AA, SMB
Mounting Type	Surface Mount
Operating Temperature	-65°C ~ 150°C (TJ)
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the SMBJ6.5C is determined by the following critical electrical and mechanical parameters:

Voltage - Reverse Standoff (Typ): 6.5V
Voltage - Clamping (Max) @ Ipp: Must not exceed 11.76V
Current - Peak Pulse (10/1000µs): Minimum 53.6A
Power - Peak Pulse: Minimum 600W
Package / Case: DO-214AA or SMB equivalent
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant

All substitute parts listed maintain the 6.5V reverse standoff voltage and support the required peak pulse current and power dissipation. Substitute parts with clamping voltages of 11.2V are acceptable as they remain within the functional operating range. Parts with higher peak pulse current ratings (71.4A) or power ratings (800W) provide enhanced performance margins and are direct substitutes. All candidates are active products with current manufacturing status and full RoHS3 compliance.

Parameter Comparison

Parameter	SMBJ6.5C (Littelfuse)	SMBJ6.5CA (EVVO Semi)	SMB8J6.5CA-E3/52 (Vishay)	SMB8J6.5CA-E3/5B (Vishay)	SMBJ6.5CA-13-F (Diodes Inc)	SMBJ6.5CA-E3/52 (Vishay)	SMBJ6.5CA-TP (MCC)	SMBJ6.5CA-TR (STMicroelectronics)	SMBJ6V5CA (TSC)
Voltage - Reverse Standoff (Typ)	6.5V	6.5V	6.5V	6.5V	6.5V	6.5V	6.5V	6.5V	6.5V
Voltage - Breakdown (Min)	6.84V	7.22V	7.22V	7.22V	7.22V	7.22V	7.22V	7.2V	7.22V
Voltage - Clamping (Max) @ Ipp	11.76V	11.2V	11.2V	11.2V	11.2V	11.2V	11.2V	11.2V	11.2V
Current - Peak Pulse (10/1000µs)	53.6A	53.6A	71.4A	71.4A	53.6A	53.6A	53.6A	56A	53.6A
Power - Peak Pulse	600W	600W	800W	800W	600W	600W	600W	600W	600W
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB
Operating Temperature	-65°C ~ 150°C	-65°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 175°C	-55°C ~ 150°C	-55°C ~ 150°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All listed substitute parts are active products with current manufacturing support, addressing the obsolescence of the SMBJ6.5C. Selection among substitutes should be based on the following criteria:

Primary Substitutes (Matched Specifications): SMBJ6.5CA (EVVO Semi), SMBJ6.5CA-13-F (Diodes Incorporated), SMBJ6.5CA-E3/52 (Vishay), SMBJ6.5CA-TP (Micro Commercial Co), SMBJ6.5CA-TR (STMicroelectronics), and SMBJ6V5CA (Taiwan Semiconductor Corporation) all maintain 53.6A peak pulse current and 600W power dissipation ratings with 11.2V clamping voltage. These parts are direct functional equivalents.

Enhanced Performance Substitutes: SMB8J6.5CA-E3/52 and SMB8J6.5CA-E3/5B (Vishay TransZorb® series) provide higher peak pulse current (71.4A) and power dissipation (800W), offering improved transient protection margins while maintaining the same 6.5V reverse standoff voltage and 11.2V clamping voltage.

Temperature Consideration: SMBJ6.5CA-TP (Micro Commercial Co) extends the upper operating temperature to 175°C, compared to 150°C for most alternatives, providing enhanced thermal performance for high-temperature applications.

All substitute parts carry ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity ratings, ensuring compatibility with standard manufacturing and storage practices.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with 11.2V clamping voltage instead of the original 11.76V?

A: Yes. The 11.2V clamping voltage of substitute parts remains within acceptable functional parameters for general-purpose transient voltage suppression. The lower clamping voltage provides slightly tighter voltage regulation during transient events.

Q: Are the Vishay SMB8J6.5CA parts with 71.4A peak pulse current compatible with the SMBJ6.5C application?

A: Yes. The higher peak pulse current (71.4A versus 53.6A) and increased power dissipation (800W versus 600W) make these parts direct substitutes with enhanced performance margins. They maintain the same 6.5V reverse standoff voltage and 11.2V clamping voltage.

Q: What is the difference between the various packaging designations (CT, TR, SMB)?

A: CT (Cut Tape) and Digi-Reel® indicate tape-and-reel packaging in cut form. TR (Tape & Reel) indicates standard continuous tape-and-reel packaging. SMB refers to the component package type (DO-214AA). All are surface-mount compatible and functionally equivalent.

Q: Does the operating temperature range affect substitution compatibility?

A: Operating temperature range affects application suitability but not electrical substitution compatibility. The SMBJ6.5C operates from -65°C to 150°C. Most substitutes operate from -55°C to 150°C, which is acceptable for most applications. SMBJ6.5CA-TP extends to 175°C for high-temperature environments.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification, matching the original SMBJ6.5C specification.

Q: Which substitute offers the best inventory availability?

A: SMBJ6V5CA (Taiwan Semiconductor Corporation) has the highest reported inventory at 300,300 pieces. SMBJ6.5CA (EVVO Semi) has 146,145 pieces available. Both provide substantial stock for production requirements.

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