SMB8J6.5C-E3/52 Equivalent & Substitute Parts

Part Overview

The SMB8J6.5C-E3/52 is a transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 6.5V reverse standoff with 12.3V maximum clamping voltage. This component is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility across voltage ratings, peak pulse current handling, and thermal operating ranges while conforming to surface mount DO-214AA (SMB) packaging standards.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	6.5	V
Voltage - Breakdown (Min)	7.22	V
Voltage - Clamping (Max) @ Ipp	12.3	V
Current - Peak Pulse (10/1000µs)	65	A
Power - Peak Pulse	800	W
Operating Temperature Range	-55 to 150	°C (TJ)
Package / Case	DO-214AA, SMB	—
Type	Zener	—
Bidirectional Channels	1	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - Reverse Standoff (Typ): 6.5V (exact match required)
Voltage - Breakdown (Min): 7.22V (exact match required)
Bidirectional Channels: 1 (exact match required)
Package / Case: DO-214AA, SMB (exact match required)
Type: Zener (exact match required)
RoHS Status: ROHS3 Compliant (compliance requirement)
Moisture Sensitivity Level (MSL): 1 (Unlimited) (exact match required)

Secondary Compatibility Parameters:

Voltage - Clamping (Max) @ Ipp: 11.2V to 12.3V (acceptable range)
Current - Peak Pulse (10/1000µs): 48.7A to 71.4A (acceptable range)
Power - Peak Pulse: 600W to 800W (acceptable range)
Operating Temperature Range: -65°C to 175°C (acceptable range, must encompass -55°C to 150°C minimum)

Substitute parts meeting all primary criteria and falling within secondary parameter ranges are electrically and mechanically compatible with the original SMB8J6.5C-E3/52 component.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage - Reverse Standoff (V)	Voltage - Breakdown (V)	Voltage - Clamping (V)	Current - Peak Pulse (A)	Power - Peak Pulse (W)	Operating Temperature (°C)	Product Status
SMB8J6.5C-E3/52	Vishay General Semiconductor	6.5	7.22	12.3	65	800	-55 to 150	Obsolete
SMB8J6.5CA-E3/52	Vishay General Semiconductor	6.5	7.22	11.2	71.4	800	-55 to 150	Active
1SMB6.5CA TR13 PBFREE	Central Semiconductor Corp	6.5	7.22	11.2	53.6	600	-65 to 150	Active
SMBJ6.5CA	EVVO Semi	6.5	7.22	11.2	53.6	600	-65 to 150	Active
SMBJ6.5CA-HRA	Littelfuse	6.5	7.22	11.2	53.6	600	-65 to 150	Active
SMBJ6.5CA-TP	Micro Commercial Co	6.5	7.22	11.2	53.6	600	-55 to 175	Active
SMBJ6.5CA-TR	STMicroelectronics	6.5	7.2	11.2	56	600	-55 to 150	Active
SMBJ6.5CAE3/TR13	Microchip Technology	6.5	7.22	11.2	53.6	600	-65 to 150	Active
SMBJ6.5CE3/TR13	Microchip Technology	6.5	7.22	12.3	48.7	600	-65 to 150	Active

Engineering Selection Recommendations

All listed substitute parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings, meeting regulatory and environmental requirements equivalent to the original SMB8J6.5C-E3/52.

Direct Electrical Match: SMB8J6.5CA-E3/52 (Vishay General Semiconductor) provides the closest electrical profile, maintaining 12.3V clamping voltage and 800W peak pulse power identical to the original part while offering active product status and improved peak pulse current (71.4A versus 65A).

Clamping Voltage Consideration: SMBJ6.5CE3/TR13 (Microchip Technology) matches the original 12.3V clamping specification. All other substitutes operate at 11.2V clamping voltage, which remains within acceptable operating parameters for general-purpose transient suppression applications but represents a 0.9V reduction from the original specification.

Thermal Operating Range: SMBJ6.5CA-TP (Micro Commercial Co) extends the upper operating temperature to 175°C, providing enhanced thermal margin compared to the original -55°C to 150°C range.

Availability and Supply: SMBJ6.5CA (EVVO Semi) offers the highest inventory availability (146,145 pieces) among active substitutes, supporting production continuity and cost optimization.

Frequently Asked Questions (FAQ)

Q: Can SMB8J6.5CA-E3/52 directly replace SMB8J6.5C-E3/52? A: Yes. Both parts share identical reverse standoff voltage (6.5V), breakdown voltage (7.22V), and clamping voltage (12.3V). SMB8J6.5CA-E3/52 is active status and offers higher peak pulse current (71.4A versus 65A), making it a direct functional equivalent.

Q: What is the significance of the 11.2V versus 12.3V clamping voltage difference? A: Clamping voltage determines the maximum transient voltage the diode allows across protected circuitry. The 11.2V variants reduce clamping voltage by 0.9V compared to the original 12.3V specification. For general-purpose applications, this difference remains within acceptable suppression performance. Applications requiring precise voltage limiting at 12.3V should select SMBJ6.5CE3/TR13 or SMB8J6.5CA-E3/52.

Q: Are all substitutes compatible with existing PCB layouts? A: Yes. All substitute parts use DO-214AA (SMB) surface mount packaging, maintaining identical footprint and land pattern compatibility with designs originally specified for SMB8J6.5C-E3/52.

Q: What packaging options are available? A: Substitutes are supplied in Tape & Reel (TR), Cut Tape (CT) & Digi-Reel®, or mixed packaging configurations. Verify packaging selection with supplier documentation to match production assembly requirements.

Q: Do all substitutes meet RoHS and REACH compliance? A: All listed substitutes are ROHS3 compliant. REACH status is unaffected or unaffected for all parts, confirming regulatory compliance equivalent to the original component.

Q: Which substitute offers the widest operating temperature range? A: SMBJ6.5CA-TP (Micro Commercial Co) operates across -55°C to 175°C, providing the broadest thermal envelope. This exceeds the original -55°C to 150°C specification by 25°C at the upper limit.

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