SMBJ170CA-M3/5B Equivalent & Substitute Parts

Part Overview

The SMBJ170CA-M3/5B is a transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This bidirectional Zener diode operates in the DO-214AA (SMB) surface mount package and is designed for general-purpose transient voltage suppression applications. The part is active in production status with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). Substitute parts are identified based on matching electrical specifications and mechanical compatibility within the SMBJ170 series and equivalent voltage rating classifications.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	170	V
Voltage - Breakdown (Min)	189	V
Voltage - Clamping (Max) @ Ipp	275	V
Current - Peak Pulse (10/1000µs)	2.2	A
Power - Peak Pulse	600	W
Operating Temperature Range	-55 to 150	°C (TJ)
Package / Case	DO-214AA, SMB	-
Mounting Type	Surface Mount	-
Type	Zener	-
Bidirectional Channels	1	-
RoHS Status	ROHS3 Compliant	-
Moisture Sensitivity Level	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitute parts for the SMBJ170CA-M3/5B are classified into two categories based on electrical and mechanical compatibility:

Category 1: Direct Electrical Equivalents (170V Rating) Parts that maintain identical voltage specifications (170V reverse standoff, 189V breakdown minimum, 275V clamping maximum) and current ratings (2.2A peak pulse). These parts are interchangeable at the circuit level and include variants from Vishay, Diodes Incorporated, Littelfuse Inc., and Micro Commercial Co. Differences exist only in packaging designations (tape & reel variants) and minor temperature range extensions. The key parameters determining substitution are: reverse standoff voltage, breakdown voltage, clamping voltage, peak pulse current, and DO-214AA (SMB) package compatibility.

Category 2: Manufacturer Alternatives (160V Rating) The SMBJ160CA from Taiwan Semiconductor Corporation operates at a lower voltage rating (160V reverse standoff, 178V breakdown minimum, 259V clamping maximum) with slightly higher peak pulse current (2.3A). This part is suitable only when circuit design permits operation at reduced voltage suppression levels.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (V)	Voltage - Breakdown Min (V)	Voltage - Clamping Max (V)	Current - Peak Pulse (A)	Power - Peak Pulse (W)	Operating Temp (°C)	Package
SMBJ170CA-M3/5B	Vishay	170	189	275	2.2	600	-55 to 150	DO-214AA (SMB)
SMBJ170CA-E3/52	Vishay	170	189	275	2.2	600	-55 to 150	DO-214AA (SMB)
SMBJ170CA-E3/5B	Vishay	170	189	275	2.2	600	-55 to 150	DO-214AA (SMB)
SMBJ170CA	Meritek	170	189	275	2.18	600	-55 to 150	DO-214AA (SMB)
SMBJ170CA-13-F	Diodes Incorporated	170	189	275	2.2	600	-55 to 150	DO-214AA (SMB)
SMBJ170CA-HR	Littelfuse Inc.	170	189	275	2.2	600	-65 to 150	DO-214AA (SMB)
SMBJ170CA-TP	Micro Commercial Co	170	189	275	2.2	600	-55 to 175	DO-214AA (SMB)
SMBJ160CA	Taiwan Semiconductor	160	178	259	2.3	600	-55 to 150	DO-214AA (SMB)

Engineering Selection Recommendations

All substitute parts listed maintain active product status and ROHS3 compliance. Selection among the 170V-rated direct equivalents (SMBJ170CA variants from Vishay, Diodes Incorporated, Littelfuse Inc., and Micro Commercial Co) is determined by availability, packaging designation, and temperature range requirements. The SMBJ170CA-HR from Littelfuse extends the lower operating temperature to -65°C, while the SMBJ170CA-TP from Micro Commercial Co extends the upper temperature to 175°C. The Meritek SMBJ170CA variant exhibits a marginally lower peak pulse current (2.18A versus 2.2A) and should be evaluated for applications with tight current margin requirements. The SMBJ160CA from Taiwan Semiconductor Corporation is suitable only when circuit design specifications permit operation at reduced voltage suppression levels (160V standoff versus 170V).

Frequently Asked Questions (FAQ)

Q: Can SMBJ170CA-E3/52 and SMBJ170CA-E3/5B be used interchangeably with SMBJ170CA-M3/5B? A: Yes. Both parts are Vishay products with identical electrical specifications (170V reverse standoff, 189V breakdown, 275V clamping, 2.2A peak pulse) and DO-214AA (SMB) package compatibility. The suffix designations indicate packaging and tape configuration variants only.

Q: What is the difference between SMBJ170CA-HR and other 170V variants? A: The SMBJ170CA-HR from Littelfuse extends the lower operating temperature limit to -65°C (compared to -55°C for standard variants). All other electrical and mechanical parameters remain identical. This variant is suitable for applications requiring enhanced low-temperature performance.

Q: Is the Meritek SMBJ170CA a suitable substitute despite the 2.18A peak pulse rating? A: The Meritek part operates at 2.18A peak pulse versus 2.2A for other variants. This 0.02A difference represents a 0.9% reduction. Substitution is acceptable for applications where circuit design accommodates this tolerance. Verify peak pulse current requirements in your specific application.

Q: Can SMBJ160CA replace SMBJ170CA-M3/5B? A: The SMBJ160CA operates at a lower voltage rating (160V reverse standoff versus 170V). Substitution is only valid when circuit design specifications permit operation at reduced voltage suppression levels. Direct replacement is not recommended for applications requiring 170V protection.

Q: Are all substitute parts available in tape & reel packaging? A: All listed 170V-rated substitutes are available in tape & reel (TR) packaging suitable for automated assembly. The Meritek SMBJ170CA does not specify packaging designation in available data.

Q: Do all substitute parts meet ROHS3 compliance? A: Yes. All substitute parts listed are ROHS3 compliant with MSL 1 (unlimited moisture sensitivity level), matching the compliance profile of the SMBJ170CA-M3/5B.

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