1SMB60CAT3 Equivalent & Substitute Parts

Part Overview

The 1SMB60CAT3 is a transient voltage suppressor (TVS) diode manufactured by onsemi, designed for general-purpose overvoltage protection in surface mount applications. This component features a 60V reverse standoff voltage with 96.8V maximum clamping voltage and 6.2A peak pulse current capability in a DO-214AA (SMB) package. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and production requirements.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	60	V
Voltage - Breakdown (Min)	66.7	V
Voltage - Clamping (Max) @ Ipp	96.8	V
Current - Peak Pulse (10/1000µs)	6.2	A
Power - Peak Pulse	600	W
Package / Case	DO-214AA, SMB	—
Bidirectional Channels	1	—
Operating Temperature	-65 to 150	°C
Mounting Type	Surface Mount	—

Substitute Part Grouping Explanation

Substitution for the 1SMB60CAT3 is determined by matching the following critical electrical and mechanical parameters:

Voltage - Reverse Standoff: 60V (nominal)
Voltage - Clamping (Max) @ Ipp: 96.8V
Current - Peak Pulse (10/1000µs): 6.2A
Power - Peak Pulse: 600W
Package / Case: DO-214AA (SMB)
Bidirectional Channels: 1
Mounting Type: Surface Mount

Substitute parts are classified into two categories:

Direct Substitutes maintain identical electrical specifications and package configuration, enabling pin-for-pin replacement without circuit modification.

Similar Substitutes share the same package and primary voltage/current ratings but may exhibit minor variations in secondary parameters such as clamping voltage tolerance, operating temperature range, or capacitance characteristics. These parts are functionally equivalent for general-purpose transient suppression applications.

Parameter Comparison

Part Number	Manufacturer	Vwm (Typ) V	Vbr (Min) V	Vc (Max) @ Ipp V	Ipp (10/1000µs) A	Ppk W	Package	Temp Range °C	RoHS Status	Product Status
1SMB60CAT3	onsemi	60	66.7	96.8	6.2	600	DO-214AA (SMB)	-65 to 150	Non-compliant	Obsolete
SMBJ60CA	MDD	60	66.7	96.8	6.2	600	DO-214AA (SMB)	-50 to 150	ROHS3 Compliant	Active
SMBJ60CA-13-F	Diodes Incorporated	60	66.7	96.8	6.2	600	DO-214AA (SMB)	-55 to 150	ROHS3 Compliant	Active
SMBJ60CA-HR	Littelfuse Inc.	60	66.7	96.8	6.2	600	DO-214AA (SMB)	-65 to 150	ROHS3 Compliant	Active
SMBJ60CA-HRA	Littelfuse Inc.	60	66.7	96.8	6.2	600	DO-214AA (SMB)	-65 to 150	ROHS3 Compliant	Active
SMBJ60CA-M3/52	Vishay General Semiconductor	60	66.7	96.8	6.2	600	DO-214AA (SMB)	-55 to 150	ROHS3 Compliant	Active
SMBJ60CA-M3/5B	Vishay General Semiconductor	60	66.7	96.8	6.2	600	DO-214AA (SMB)	-55 to 150	ROHS3 Compliant	Active
SMBJ58CA	Good-Ark Semiconductor	58	64.4	93.6	6.4	600	DO-214AA (SMB)	-55 to 150	ROHS3 Compliant	Active

Engineering Selection Recommendations

Primary Substitutes (Identical Electrical Specifications):

SMBJ60CA (MDD), SMBJ60CA-13-F (Diodes Incorporated), SMBJ60CA-HR (Littelfuse Inc.), SMBJ60CA-HRA (Littelfuse Inc.), SMBJ60CA-M3/52 (Vishay), and SMBJ60CA-M3/5B (Vishay) are direct functional equivalents with matching 60V standoff, 96.8V clamping, and 6.2A peak pulse specifications. All substitute parts are ROHS3 compliant and carry active product status, ensuring long-term availability and supply chain continuity.

Temperature Range Consideration:

The original 1SMB60CAT3 operates across -65°C to 150°C. SMBJ60CA-HR and SMBJ60CA-HRA from Littelfuse maintain this full temperature range. SMBJ60CA (MDD) operates to -50°C minimum, while Diodes Incorporated and Vishay variants operate to -55°C minimum. Selection should account for application-specific temperature requirements.

Secondary Substitute (Similar Specifications):

SMBJ58CA (Good-Ark Semiconductor) provides a functionally similar alternative with a 58V standoff voltage (2V lower than the original specification). This part exhibits 93.6V maximum clamping voltage and 6.4A peak pulse current. This substitute is appropriate only when the lower voltage rating is acceptable for the application circuit.

Frequently Asked Questions (FAQ)

Q: Can SMBJ60CA directly replace 1SMB60CAT3 without circuit modification?

A: Yes. SMBJ60CA maintains identical electrical specifications (60V standoff, 96.8V clamping, 6.2A peak pulse) and DO-214AA package configuration, enabling direct pin-for-pin substitution.

Q: What is the difference between SMBJ60CA variants from different manufacturers?

A: All SMBJ60CA variants (MDD, Diodes Incorporated, Littelfuse, Vishay) share identical core electrical parameters. Differences exist in operating temperature range, packaging codes, and internal design. Selection depends on temperature requirements and supply availability.

Q: Is SMBJ58CA a suitable replacement?

A: SMBJ58CA is functionally similar but operates at a lower 58V standoff voltage instead of 60V. This 2V reduction may affect circuit protection thresholds. Use only if the application circuit tolerates the lower voltage specification.

Q: Are all substitute parts RoHS compliant?

A: Yes. All active substitute parts listed carry ROHS3 compliance certification. The original 1SMB60CAT3 is RoHS non-compliant, making compliant substitutes necessary for new designs and updated production.

Q: What is the package compatibility?

A: All parts use DO-214AA (SMB) surface mount package. This ensures mechanical and electrical compatibility with existing PCB layouts and reflow soldering processes.

Q: Which substitute offers the widest operating temperature range?

A: SMBJ60CA-HR and SMBJ60CA-HRA from Littelfuse maintain the original -65°C to 150°C temperature range, matching the 1SMB60CAT3 specification.

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