SMBJ188CAHM3_A/I Equivalent & Substitute Parts

Part Overview

The SMBJ188CAHM3_A/I is a bidirectional Transient Voltage Suppressor (TVS) diode from Vishay General Semiconductor - Diodes Division, designed for telecom applications requiring transient protection. This component operates with a reverse standoff voltage of 188V and provides clamping at 328V maximum, with a peak pulse current rating of 2A and peak pulse power of 600W. The part is classified as obsolete, necessitating identification of active equivalent alternatives to maintain supply chain continuity and ensure long-term component availability for new designs and field replacements.

Substiute Parts

SMBJ188CAHM3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 754SMBJ188CAHM3_A/I Datasheet

Current PartRFQ

SMBJ188CAHM3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1153SMBJ188CAHM3_B/I Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMBJ188CAHM3_A/I is determined by strict equivalence across the following critical electrical and mechanical parameters:

Electrical Parameters (Must Match):

• Voltage - Reverse Standoff (Typ): 188V
• Voltage - Breakdown (Min): 209V
• Voltage - Clamping (Max) @ Ipp: 328V
• Current - Peak Pulse (10/1000µs): 2A
• Power - Peak Pulse: 600W
• Bidirectional Channels: 1
• Type: Zener

Mechanical Parameters (Must Match):

• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount

Compliance & Certification (Must Match):

• Grade: Automotive
• Qualification: AEC-Q101
• RoHS Status: ROHS3 Compliant

The SMBJ188CAHM3_B/I meets all substitution criteria as an active product from the same manufacturer and series, with identical electrical specifications and mechanical packaging, differing only in product status and packaging format (Tape & Reel).

Parameter Comparison

Engineering Selection Recommendations

The SMBJ188CAHM3_B/I is the direct equivalent substitute for the obsolete SMBJ188CAHM3_A/I. Both components are manufactured by Vishay General Semiconductor - Diodes Division within the TransZorb® series and maintain identical electrical performance specifications across all critical parameters: 188V reverse standoff voltage, 209V minimum breakdown voltage, 328V maximum clamping voltage, 2A peak pulse current, and 600W peak pulse power.

Both parts carry automotive-grade qualification (AEC-Q101) and maintain ROHS3 compliance, ensuring suitability for automotive and telecom applications requiring transient voltage suppression. The primary distinction is product status: the SMBJ188CAHM3_A/I is obsolete, while the SMBJ188CAHM3_B/I is active with confirmed inventory availability. The SMBJ188CAHM3_B/I is supplied in Tape & Reel packaging format, which is standard for high-volume production environments.

For new designs and field replacements, the SMBJ188CAHM3_B/I is the specified equivalent, providing assured long-term supply chain continuity and manufacturer support.

Frequently Asked Questions (FAQ)

Q: Can the SMBJ188CAHM3_B/I be used as a direct replacement for the SMBJ188CAHM3_A/I?

A: Yes. Both components are electrically and mechanically identical, with matching voltage ratings (188V standoff, 328V clamp), current ratings (2A peak pulse), power ratings (600W), package type (DO-214AA SMB), and automotive qualifications (AEC-Q101). The SMBJ188CAHM3_B/I is the active equivalent.

Q: What is the difference between the SMBJ188CAHM3_A/I and SMBJ188CAHM3_B/I?

A: The primary differences are product status and packaging format. The SMBJ188CAHM3_A/I is obsolete, while the SMBJ188CAHM3_B/I is active. The SMBJ188CAHM3_B/I is supplied in Tape & Reel (TR) packaging, which is standard for production environments. All electrical and mechanical specifications are identical.

Q: Are both parts suitable for automotive applications?

A: Yes. Both the SMBJ188CAHM3_A/I and SMBJ188CAHM3_B/I carry automotive-grade classification and AEC-Q101 qualification, meeting automotive industry standards for transient voltage suppression in telecom and related applications.

Q: Does the Tape & Reel packaging of the SMBJ188CAHM3_B/I affect compatibility?

A: No. Tape & Reel is a packaging and delivery format for automated assembly processes. The component itself—the DO-214AA SMB package—remains identical. Tape & Reel packaging is standard for production volumes and does not affect electrical performance or mechanical fit on PCBs.

Q: Are both parts RoHS compliant?

A: Yes. Both the SMBJ188CAHM3_A/I and SMBJ188CAHM3_B/I are ROHS3 compliant, meeting environmental and regulatory requirements for electronic components.

Q: What is the operating temperature range for these components?

A: Both components operate across -55°C to 150°C junction temperature (TJ), suitable for automotive and industrial telecom environments.