SMBJ170CA-M3/52 Equivalent & Substitute Parts

Part Overview

The SMBJ170CA-M3/52 is a bidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the DO-214AA (SMB) package and provides transient overvoltage protection for general-purpose applications. The part is Active status and ROHS3 compliant. Equivalent and substitute parts are identified based on matching electrical characteristics and mechanical compatibility to ensure functional interchangeability in circuit protection applications.

Key Parameters

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

Substitute Part Grouping Explanation

Substitute parts for the SMBJ170CA-M3/52 are classified into two categories based on electrical and mechanical compatibility:

Direct Substitutes (Identical Electrical Characteristics)

Direct substitutes maintain all critical electrical parameters: 170V reverse standoff voltage, 189V minimum breakdown voltage, 275V maximum clamping voltage, and 2.2A peak pulse current. These parts differ only in manufacturer, packaging variant, or temperature rating extension. Direct substitutes include SMBJ170CA-E3/52, SMBJ170CA-E3/5B, SMBJ170CA-13-F, SMBJ170CA-HR, and SMBJ170CA-TP. All direct substitutes use the DO-214AA (SMB) surface mount package and maintain ROHS3 compliance and MSL 1 rating.

Manufacturer-Recommended Alternatives (Similar Electrical Characteristics)

Manufacturer-recommended alternatives include SMBJ160CA (Taiwan Semiconductor Corporation) and SMBJ170CA (Meritek). These parts operate at slightly different voltage ratings or current specifications but remain functionally compatible for general-purpose transient protection applications. SMBJ160CA operates at 160V reverse standoff with 259V clamping voltage and 2.3A peak pulse current. Meritek SMBJ170CA maintains 170V standoff and 275V clamping with 2.18A peak pulse current.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Operating Temperature	Package	RoHS Status
SMBJ170CA-M3/52	Vishay General Semiconductor	170V	275V	2.2A	-55°C ~ 150°C	DO-214AA (SMB)	ROHS3
SMBJ170CA-E3/52	Vishay General Semiconductor	170V	275V	2.2A	-55°C ~ 150°C	DO-214AA (SMB)	ROHS3
SMBJ170CA-E3/5B	Vishay General Semiconductor	170V	275V	2.2A	-55°C ~ 150°C	DO-214AA (SMB)	ROHS3
SMBJ170CA-13-F	Diodes Incorporated	170V	275V	2.2A	-55°C ~ 150°C	DO-214AA (SMB)	ROHS3
SMBJ170CA-HR	Littelfuse Inc.	170V	275V	2.2A	-65°C ~ 150°C	DO-214AA (SMB)	ROHS3
SMBJ170CA-TP	Micro Commercial Co	170V	275V	2.2A	-55°C ~ 175°C	DO-214AA (SMB)	ROHS3
SMBJ160CA	Taiwan Semiconductor Corporation	160V	259V	2.3A	-55°C ~ 150°C	DO-214AA (SMB)	ROHS3
SMBJ170CA	Meritek	170V	275V	2.18A	-55°C ~ 150°C	DO-214AA (SMB)	ROHS3

Engineering Selection Recommendations

Direct Substitutes (SMBJ170CA-E3/52, SMBJ170CA-E3/5B, SMBJ170CA-13-F, SMBJ170CA-HR, SMBJ170CA-TP)

These parts are fully interchangeable with the SMBJ170CA-M3/52 for applications requiring 170V reverse standoff protection. All maintain Active product status and ROHS3 compliance. Selection among direct substitutes depends on availability and temperature operating range requirements. SMBJ170CA-HR extends the lower temperature limit to -65°C, while SMBJ170CA-TP extends the upper temperature limit to 175°C. For standard applications within -55°C to 150°C, all direct substitutes perform identically.

Manufacturer-Recommended Alternatives (SMBJ160CA, SMBJ170CA)

SMBJ160CA operates at 160V reverse standoff voltage, representing a 10V reduction from the primary specification. This part is suitable only for applications where the lower voltage rating is acceptable. SMBJ170CA from Meritek maintains the 170V standoff specification with marginally lower peak pulse current (2.18A versus 2.2A), representing a 0.9% reduction. Both alternatives maintain ROHS3 compliance and general-purpose application suitability.

Frequently Asked Questions (FAQ)

Q: Can SMBJ170CA-E3/52 replace SMBJ170CA-M3/52 directly?

A: Yes. Both parts share identical electrical specifications: 170V reverse standoff, 275V clamping voltage, and 2.2A peak pulse current. Both use DO-214AA (SMB) surface mount packaging and are ROHS3 compliant. The difference is packaging variant designation only.

Q: What is the difference between SMBJ170CA-HR and SMBJ170CA-TP?

A: SMBJ170CA-HR extends the lower operating temperature to -65°C (versus -55°C standard). SMBJ170CA-TP extends the upper operating temperature to 175°C (versus 150°C standard). Electrical characteristics remain identical. Selection depends on the application's temperature requirements.

Q: Is SMBJ160CA compatible with SMBJ170CA-M3/52?

A: SMBJ160CA operates at 160V reverse standoff versus 170V for the primary part. This 10V reduction may affect circuit protection margins. Use SMBJ160CA only if the application circuit design accommodates the lower voltage rating.

Q: Do all substitute parts use the same DO-214AA package?

A: Yes. All listed substitute parts use the DO-214AA (SMB) surface mount package, ensuring mechanical and footprint compatibility with the SMBJ170CA-M3/52.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the primary part's environmental certifications.

Q: What is the significance of the suffix codes (E3/52, E3/5B, 13-F, HR, TP)?

A: Suffix codes indicate manufacturer-specific packaging variants, tape reel configurations, or temperature rating extensions. These codes do not affect electrical interchangeability for parts with identical voltage and current specifications.

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