SMBJ170C-E3/52 Equivalent & Substitute Parts

Part Overview

The SMBJ170C-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 a 170V reverse standoff voltage and 304V maximum clamping voltage, housed in a DO-214AA (SMB) package. The SMBJ170C-E3/52 is currently listed as obsolete. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production runs and field replacements.

Substiute Parts

SMBJ170C-E3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 1000SMBJ170C-E3/52 Datasheet

Current PartRFQ

SMBJ170CA-E3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 45198SMBJ170CA-E3/52 Datasheet

DirectRFQ

SMBJ170CE3/TR13

Microchip TechnologyIn Stock: 1112SMBJ170CE3/TR13 Datasheet

DirectRFQ

SMBJ170CA

MeritekIn Stock: 20308SMBJ170CA Datasheet

MFR RecommendedRFQ

SMBJ170CA

MeritekIn Stock: 20308SMBJ170CA Datasheet

MFR RecommendedRFQ

SMBJ170CA

MeritekIn Stock: 20308SMBJ170CA Datasheet

MFR RecommendedRFQ

SMBJ170CA

MeritekIn Stock: 20308SMBJ170CA Datasheet

MFR RecommendedRFQ

SMBJ170CA-13-F

Diodes IncorporatedIn Stock: 1865SMBJ170CA-13-F Datasheet

MFR RecommendedRFQ

SMBJ170CA-HR

Littelfuse Inc.In Stock: 4244SMBJ170CA-HR Datasheet

MFR RecommendedRFQ

SMBJ170CA-TR

STMicroelectronicsIn Stock: 15383SMBJ170CA-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMBJ170C-E3/52 is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): 170V
• Voltage - Breakdown (Min): 189V
• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount
• Type: Zener, Bidirectional
• RoHS Status: ROHS3 Compliant
• Operating Temperature Range compatibility

Substitute parts are grouped into two categories based on voltage clamping characteristics:

Category A - Matched Clamping Voltage (304V): Parts with identical maximum clamping voltage specifications, suitable for direct replacement in applications requiring precise voltage suppression at 304V.

Category B - Alternative Clamping Voltage (275V): Parts with lower maximum clamping voltage (275V) but higher peak pulse current capability (2.2A), suitable for applications where slightly lower clamping voltage is acceptable and enhanced current handling is beneficial.

All substitute parts maintain the same reverse standoff voltage (170V), breakdown voltage minimum (189V), package format (DO-214AA/SMB), and RoHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute (Matched Specifications): SMBJ170CE3/TR13 (Microchip Technology) provides identical electrical performance to the SMBJ170C-E3/52, with matching 304V clamping voltage and 2A peak pulse current. This part is active in production, ROHS3 compliant, and extends the operating temperature range to -65°C, offering enhanced thermal performance. This is the recommended direct replacement for applications requiring exact parameter matching.

Alternative Substitutes (Lower Clamping Voltage): SMBJ170CA-E3/52 (Vishay), SMBJ170CA (Meritek), SMBJ170CA-13-F (Diodes Incorporated), SMBJ170CA-HR (Littelfuse Inc.), and SMBJ170CA-TR (STMicroelectronics) are suitable alternatives where a 275V maximum clamping voltage is acceptable. These parts offer enhanced peak pulse current capability (2.2A or 2.18A) and are all active in production with ROHS3 compliance. The Littelfuse SMBJ170CA-HR variant extends the operating temperature range to -65°C.

All substitute parts maintain the critical 170V reverse standoff voltage, 189V minimum breakdown voltage, DO-214AA/SMB package format, and regulatory compliance required for functional equivalence.

Frequently Asked Questions (FAQ)

Q: Can SMBJ170CA-E3/52 replace SMBJ170C-E3/52 directly?

A: Yes. Both parts share identical reverse standoff voltage (170V), breakdown voltage (189V), and package format (DO-214AA/SMB). The SMBJ170CA-E3/52 has a lower clamping voltage (275V vs. 304V) but higher peak pulse current (2.2A vs. 2A). This substitution is valid for applications where 275V clamping voltage meets the design requirements.

Q: What is the difference between 304V and 275V clamping voltage specifications?

A: Clamping voltage is the maximum voltage across the TVS diode when conducting peak pulse current. The SMBJ170C-E3/52 clamps at 304V maximum, while alternative parts clamp at 275V maximum. Selection depends on the maximum allowable voltage in your protection circuit. Lower clamping voltage provides tighter voltage regulation but may not be suitable for all applications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, matching the original part's regulatory status.

Q: Does operating temperature range affect substitution?

A: The SMBJ170C-E3/52 operates from -55°C to 150°C. SMBJ170CE3/TR13 (Microchip) and SMBJ170CA-HR (Littelfuse) extend the lower temperature limit to -65°C, providing enhanced cold-temperature performance. This is a beneficial enhancement for applications requiring extended temperature operation.

Q: Can I use parts with different peak pulse current ratings?

A: Yes, provided your circuit design accommodates the different current specifications. The original part handles 2A peak pulse current. Substitutes with 2.2A or 2.18A ratings provide enhanced current handling capability and are backward compatible for applications requiring 2A or less.

Q: What packaging options are available?

A: All substitute parts use the DO-214AA (SMB) surface-mount package, matching the original SMBJ170C-E3/52. Packaging variants (Tape & Reel, Cut Tape, Digi-Reel) are available from different manufacturers but do not affect electrical performance or PCB compatibility.