SMBJ85C-E3/52 Equivalent & Substitute Parts

Part Overview

The SMBJ85C-E3/52 is a transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, designed for general-purpose overvoltage protection in surface-mount applications. This part operates with an 85V reverse standoff voltage and provides 151V maximum clamping voltage at peak pulse current. The SMBJ85C-E3/52 is classified as obsolete, necessitating identification of active equivalent and substitute components that maintain functional compatibility within specified electrical parameters.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	85V
Voltage - Breakdown (Min)	94.4V
Voltage - Clamping (Max) @ Ipp	151V
Current - Peak Pulse (10/1000µs)	4A
Power - Peak Pulse	600W
Package / Case	DO-214AA, SMB
Operating Temperature	-55°C ~ 150°C (TJ)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the SMBJ85C-E3/52 is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - Reverse Standoff: 85V (exact match required)
Voltage - Breakdown (Min): 94.4V (exact match required)
Package / Case: DO-214AA, SMB (mechanical compatibility)
Mounting Type: Surface Mount (functional requirement)
Operating Temperature Range: -55°C minimum to 150°C maximum (thermal compatibility)

Secondary Compatibility Factors:

Voltage - Clamping (Max) @ Ipp: Acceptable range 137V to 151V
Current - Peak Pulse (10/1000µs): Acceptable range 4A to 4.4A
Power - Peak Pulse: 600W (standard for category)
RoHS3 Compliance and MSL 1 rating (regulatory and handling requirements)

Parts meeting these criteria are classified as direct substitutes. Parts with different voltage ratings (such as 8.5V standoff voltage) are not functionally equivalent and do not qualify as substitutes for this 85V application.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Product Status	Package / Case
SMBJ85C-E3/52	Vishay General Semiconductor - Diodes Division	85V	94.4V	151V	4A	Obsolete	DO-214AA, SMB
SMBJ85CA-E3/52	Vishay General Semiconductor - Diodes Division	85V	94.4V	137V	4.4A	Active	DO-214AA, SMB
SMBJ85CA	Meritek	85V	94.4V	137V	4.38A	Active	DO-214AA (SMB)
SMBJ85CA-13	Diodes Incorporated	85V	94.4V	137V	4.4A	Discontinued at DiGi Electronics	DO-214AA, SMB

Engineering Selection Recommendations

Primary Recommendation: SMBJ85CA-E3/52

The SMBJ85CA-E3/52 from Vishay General Semiconductor - Diodes Division is the direct equivalent substitute. This part maintains identical voltage ratings (85V reverse standoff, 94.4V breakdown minimum) and package specifications (DO-214AA, SMB) as the obsolete SMBJ85C-E3/52. The SMBJ85CA-E3/52 is currently in active production status with 18,050 pieces in stock. It carries ROHS3 compliance and MSL 1 rating, meeting all regulatory and handling requirements. The clamping voltage of 137V and peak pulse current of 4.4A fall within acceptable operational parameters for this application category.

Secondary Recommendation: SMBJ85CA (Meritek)

The SMBJ85CA from Meritek provides functional equivalence with matching 85V reverse standoff and 94.4V breakdown voltage specifications. This part is actively produced with substantial inventory availability (145,100 pieces). It maintains DO-214AA (SMB) package compatibility and ROHS3 compliance. The 137V clamping voltage and 4.38A peak pulse current are within acceptable ranges. Selection of this part should be based on supply chain availability and cost considerations.

Not Recommended: SMBJ85CA-13 (Diodes Incorporated)

The SMBJ85CA-13 is discontinued at DiGi Electronics and carries RoHS non-compliant status, making it unsuitable for new designs requiring current regulatory compliance.

Not Equivalent: 8.5V Standoff Voltage Parts

Parts such as 1SMB8.5CA TR13 PBFREE, SMBJ8.5CA-13-F, SMBJ8.5CA-HRA, and SMBJ8.5CA-TR operate at 8.5V reverse standoff voltage and are not functionally equivalent to the 85V SMBJ85C-E3/52. These represent a different product category and cannot substitute in 85V protection circuits.

Frequently Asked Questions (FAQ)

Q: Can I use an 8.5V TVS diode as a substitute for the SMBJ85C-E3/52?

A: No. The SMBJ85C-E3/52 operates at 85V reverse standoff voltage. Parts with 8.5V standoff voltage (such as SMBJ8.5CA variants) are designed for different voltage protection levels and are not functionally equivalent. Using an incorrect voltage rating will result in inadequate overvoltage protection or premature device failure.

Q: What is the difference between SMBJ85CA-E3/52 and SMBJ85CA?

A: Both parts maintain identical electrical specifications for reverse standoff voltage (85V) and breakdown voltage (94.4V). The primary differences are manufacturer (Vishay vs. Meritek), packaging format (Cut Tape vs. unspecified), and inventory availability. Both are functionally equivalent for circuit protection applications.

Q: Is the SMBJ85CA-E3/52 a direct replacement for SMBJ85C-E3/52?

A: Yes. The SMBJ85CA-E3/52 is the direct active equivalent. It maintains identical voltage ratings, package specifications (DO-214AA, SMB), and operating temperature range (-55°C to 150°C). The primary distinction is product status: SMBJ85C-E3/52 is obsolete while SMBJ85CA-E3/52 is in active production.

Q: Does the clamping voltage difference between 151V and 137V affect circuit compatibility?

A: The clamping voltage specification defines the maximum voltage across the TVS diode during transient suppression. The SMBJ85CA-E3/52 clamping voltage of 137V is lower than the original 151V specification, providing improved transient suppression performance. This represents an enhancement rather than a limitation for circuit protection.

Q: Are all substitute parts RoHS3 compliant?

A: The recommended substitutes SMBJ85CA-E3/52 and SMBJ85CA (Meritek) are both ROHS3 compliant. The SMBJ85CA-13 is RoHS non-compliant and should not be used in applications requiring current regulatory compliance.

Q: What is the significance of MSL 1 rating?

A: MSL (Moisture Sensitivity Level) 1 indicates unlimited shelf life without moisture exposure precautions. All recommended substitutes carry MSL 1 rating, meaning standard handling and storage procedures are sufficient without requiring specialized dry-pack or desiccant storage conditions.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message