SMB8J7.5C-E3/52 Equivalent & Substitute Parts

Part Overview

The SMB8J7.5C-E3/52 is a bidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, part of the TransZorb® series. This component is designed for general-purpose transient voltage protection in surface-mount applications using the DO-214AA (SMB) package format.

The SMB8J7.5C-E3/52 is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements. Active alternatives with compatible electrical and mechanical specifications are available from multiple manufacturers.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	7.5V
Voltage - Breakdown (Min)	8.33V
Voltage - Clamping (Max) @ Ipp	14.3V
Current - Peak Pulse (10/1000µs)	55.9A
Power - Peak Pulse	800W
Type	Zener
Bidirectional Channels	1
Package / Case	DO-214AA, SMB
Mounting Type	Surface Mount
Operating Temperature	-55°C ~ 150°C (TJ)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the SMB8J7.5C-E3/52 is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

Voltage - Reverse Standoff (Typ): 7.5V
Voltage - Breakdown (Min): 8.33V
Package / Case: DO-214AA, SMB
Mounting Type: Surface Mount
Bidirectional Channels: 1
Type: Zener

Acceptable Variation Parameters:

Voltage - Clamping (Max) @ Ipp: 12.9V to 14.3V (both values present in substitute parts)
Current - Peak Pulse (10/1000µs): 42A to 62A (performance envelope)
Power - Peak Pulse: 600W to 800W (performance envelope)
Operating Temperature: -65°C to -50°C minimum; 150°C to 175°C maximum (extended ranges acceptable)

Substitute parts must maintain the same reverse standoff voltage, breakdown voltage, package format, and bidirectional channel configuration. Variations in clamping voltage, peak pulse current, and power dissipation within the specified ranges are acceptable for general-purpose transient voltage protection applications.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Package / Case	Part Status
SMB8J7.5C-E3/52	Vishay General Semiconductor - Diodes Division	7.5V	8.33V	14.3V	55.9A	800W	DO-214AA, SMB	Obsolete
SMB8J7.5CA-E3/52	Vishay General Semiconductor - Diodes Division	7.5V	8.33V	12.9V	62A	800W	DO-214AA, SMB	Active
SMBJ7.5CA	MDD	7.5V	8.33V	12.9V	46.6A	600W	DO-214AA, SMB	Active
SMBJ7.5CA-TP	Micro Commercial Co	7.5V	8.33V	12.9V	46.5A	600W	DO-214AA, SMB	Active
SMBJ7.5CAE3/TR13	Microchip Technology	7.5V	8.33V	12.9V	46.5A	600W	DO-214AA, SMB	Active
SMBJ7.5CE3/TR13	Microchip Technology	7.5V	8.33V	14.3V	42A	600W	DO-214AA, SMB	Active
SMBJ7V5CA	Taiwan Semiconductor Corporation	7.5V	8.33V	12.9V	46.5A	600W	DO-214AA, SMB	Active
TV06B7V5JB-HF	Comchip Technology	7.5V	8.33V	12.9V	46.51A	600W	DO-214AA, SMB	Active

Engineering Selection Recommendations

Primary Recommendation: SMB8J7.5CA-E3/52

The SMB8J7.5CA-E3/52 from Vishay General Semiconductor - Diodes Division is the direct manufacturer equivalent. It maintains the same manufacturer lineage as the obsolete SMB8J7.5C-E3/52, identical reverse standoff and breakdown voltages, and the same DO-214AA (SMB) package. This part is active and ROHS3 compliant with MSL 1 rating. The clamping voltage is reduced to 12.9V with increased peak pulse current to 62A, maintaining the 800W power dissipation rating.

Secondary Recommendations: SMBJ7.5CAE3/TR13 and SMBJ7.5CE3/TR13

Both Microchip Technology parts are active, ROHS3 compliant, and available in Tape & Reel packaging. SMBJ7.5CAE3/TR13 provides 12.9V clamping with 46.5A peak pulse current. SMBJ7.5CE3/TR13 matches the original 14.3V clamping voltage with 42A peak pulse current. Both support extended operating temperature ranges (-65°C to 150°C).

Alternative Options: SMBJ7.5CA, SMBJ7.5CA-TP, SMBJ7V5CA, TV06B7V5JB-HF

All remaining substitute parts maintain the critical electrical parameters (7.5V reverse standoff, 8.33V breakdown, 12.9V clamping) and DO-214AA (SMB) package format. These parts are active and ROHS3 compliant. Selection among these alternatives depends on packaging preference (Tape & Reel vs. Cut Tape), manufacturer availability, and inventory requirements.

All substitute parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 moisture sensitivity ratings, ensuring compatibility with standard manufacturing and storage protocols.

Frequently Asked Questions (FAQ)

Q: Can SMB8J7.5C-E3/52 be directly replaced with SMB8J7.5CA-E3/52?

A: Yes. Both parts are from Vishay General Semiconductor - Diodes Division and share identical reverse standoff voltage (7.5V), breakdown voltage (8.33V), and DO-214AA (SMB) package format. The SMB8J7.5CA-E3/52 is the active equivalent with improved specifications (higher peak pulse current, same power rating).

Q: What is the difference between 12.9V and 14.3V clamping voltage variants?

A: The clamping voltage determines the maximum voltage across the diode during transient suppression. The original SMB8J7.5C-E3/52 specifies 14.3V maximum clamping. Substitute parts with 12.9V clamping provide tighter voltage regulation. Selection depends on the protected circuit's voltage tolerance requirements. Both variants maintain the same 7.5V reverse standoff and 8.33V breakdown specifications.

Q: Are all substitute parts compatible with the original DO-214AA (SMB) footprint?

A: Yes. All listed substitute parts use the DO-214AA (SMB) package format and are surface-mount components. They are mechanically and electrically compatible with PCB designs specified for SMB8J7.5C-E3/52.

Q: What is the significance of the Tape & Reel (TR) packaging designation?

A: Tape & Reel packaging indicates the parts are supplied on continuous tape for automated pick-and-place assembly. This is standard for high-volume production. Cut Tape (CT) and Digi-Reel® options are available for lower-volume applications. All packaging formats contain identical components.

Q: Do all substitute parts meet RoHS3 compliance?

A: Yes. All listed substitute parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings, meeting current environmental and manufacturing standards.

Q: What operating temperature range should be specified for new designs?

A: The original SMB8J7.5C-E3/52 specifies -55°C to 150°C. Substitute parts offer equivalent or extended ranges: Microchip Technology parts extend to -65°C minimum; Micro Commercial Co extends to 175°C maximum. For design continuity, specify -55°C to 150°C unless extended temperature operation is required.

Q: Can peak pulse current variations (42A to 62A) affect circuit protection?

A: Peak pulse current rating indicates the maximum transient current the diode can suppress. Higher ratings (55.9A to 62A) provide greater transient energy absorption capacity. Lower ratings (42A to 46.5A) are acceptable for applications with lower transient energy levels. Verify that the selected part's peak pulse current meets or exceeds the circuit's maximum transient current specification.

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