SMBJ188A-M3/52 Equivalent & Substitute Parts

Part Overview

The SMBJ188A-M3/52 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, part of the TransZorb® series. This surface-mount component operates in the DO-214AA (SMB) package and is designed for general-purpose transient voltage suppression applications. The part is currently active and in production, with 940 units available in stock. Equivalent and substitute parts are identified based on matching electrical characteristics and mechanical compatibility within the SMBJ series.

Substiute Parts

SMBJ188A-M3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 977SMBJ188A-M3/52 Datasheet

Current PartRFQ

SMBJ188A-E3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 1854SMBJ188A-E3/52 Datasheet

MFR RecommendedRFQ

SMBJ160A

MeritekIn Stock: 9072SMBJ160A Datasheet

MFR RecommendedRFQ

SMBJ160A

MeritekIn Stock: 9072SMBJ160A Datasheet

MFR RecommendedRFQ

SMBJ170A

Fairchild SemiconductorIn Stock: 17321SMBJ170A Datasheet

MFR RecommendedRFQ

SMBJ170A

Fairchild SemiconductorIn Stock: 17321SMBJ170A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMBJ188A-M3/52 are identified based on the following criteria:

Primary Substitution Criteria:

• Package compatibility: DO-214AA (SMB) surface-mount package
• Unidirectional Zener TVS diode type
• General-purpose transient voltage suppression application
• Operating temperature range: -55°C ~ 150°C
• RoHS3 compliance and MSL Level 1 rating

Electrical Parameter Tolerance: Substitute parts must operate within acceptable ranges for reverse standoff voltage, breakdown voltage, clamping voltage, and peak pulse current. Parts with reverse standoff voltages between 160V and 188V and clamping voltages between 259V and 328V are classified as functional equivalents for this application category.

Substitute Parts Identified:

• SMBJ188A-E3/52 (Vishay) — Exact electrical match, alternative tape & reel configuration
• SMBJ170A (Fairchild Semiconductor) — Lower standoff voltage (170V), reduced clamping voltage (275V)
• SMBJ160A (Meritek) — Lower standoff voltage (160V), reduced clamping voltage (259V)

Parameter Comparison

Engineering Selection Recommendations

SMBJ188A-E3/52 (Vishay) — Direct equivalent with identical electrical specifications. This part is the manufacturer-recommended substitute, differing only in tape & reel configuration (E3/52 versus M3/52). Both parts maintain the same 188V reverse standoff voltage, 328V clamping voltage, and 2A peak pulse current. Selection of this part requires no circuit re-evaluation. Stock availability is higher at 1766 units.

SMBJ170A (Fairchild Semiconductor) — Functional substitute with reduced voltage ratings. The 170V reverse standoff voltage and 275V clamping voltage represent a 10% reduction from the main part. This part is suitable for applications where the protected circuit operates at lower voltage levels. Peak pulse current is slightly higher at 2.2A. All compliance certifications (ROHS3, MSL Level 1) are maintained. Stock availability is 17300 units.

SMBJ160A (Meritek) — Functional substitute with the lowest voltage ratings in the group. The 160V reverse standoff voltage and 259V clamping voltage represent approximately 15% reduction from the main part. This part is applicable to lower-voltage circuit protection scenarios. Peak pulse current is highest at 2.32A. All compliance certifications are maintained. Stock availability is 9035 units.

All substitute parts maintain active product status, ROHS3 compliance, MSL Level 1 rating, and the DO-214AA (SMB) surface-mount package required for direct PCB compatibility.

Frequently Asked Questions (FAQ)

Q: Can SMBJ188A-E3/52 be used as a direct replacement for SMBJ188A-M3/52?

A: Yes. Both parts are manufactured by Vishay with identical electrical specifications: 188V reverse standoff voltage, 328V clamping voltage, and 2A peak pulse current. The difference is in tape & reel configuration (M3/52 versus E3/52). No circuit modifications are required.

Q: What is the difference between SMBJ170A and SMBJ160A as substitutes?

A: Both parts have lower voltage ratings than the main part. SMBJ170A operates at 170V reverse standoff with 275V clamping. SMBJ160A operates at 160V reverse standoff with 259V clamping. Selection depends on the actual voltage levels present in the protected circuit. SMBJ170A is the intermediate option; SMBJ160A is for the lowest-voltage applications.

Q: Are all substitute parts in the same package?

A: Yes. All parts listed use the DO-214AA (SMB) surface-mount package. Direct PCB footprint compatibility is maintained across all substitutes.

Q: Do substitute parts meet the same compliance requirements?

A: Yes. All substitute parts are ROHS3 compliant with MSL Level 1 (Unlimited) moisture sensitivity rating, matching the main part's certifications.

Q: What is the stock availability for each part?

A: SMBJ188A-M3/52: 940 units; SMBJ188A-E3/52: 1766 units; SMBJ170A: 17300 units; SMBJ160A: 9035 units.

Q: Can lower-voltage substitutes be used in circuits designed for 188V protection?

A: No. Lower-voltage parts (SMBJ170A, SMBJ160A) are designed for circuits with lower voltage levels. Using them in a 188V circuit would result in premature clamping and potential component damage. Voltage rating matching is required for proper circuit protection.