SMB8J26CAHM3_A/I Equivalent & Substitute Parts

Part Overview

The SMB8J26CAHM3_A/I is a bidirectional transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This component is designed for telecom applications requiring transient overvoltage protection in surface mount configurations. The part operates with a 26V reverse standoff voltage and provides 800W peak pulse power dissipation in a compact DO-214AA (SMB) package.

The SMB8J26CAHM3_A/I is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for systems utilizing this TVS diode specification.

Substiute Parts

SMB8J26CAHM3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1258SMB8J26CAHM3_A/I Datasheet

Current PartRFQ

SMB8J26CAHM3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 865SMB8J26CAHM3_B/I Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SMB8J26CAHM3_A/I is determined by strict equivalence across the following critical parameters:

Electrical Parameters (Must Match):

• Voltage - Reverse Standoff (Typ): 26V
• Voltage - Breakdown (Min): 28.9V
• Current - Peak Pulse (10/1000µs): 19A
• Power - Peak Pulse: 800W
• Bidirectional Channels: 1
• Type: Zener

Mechanical & Package Parameters (Must Match):

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

Compliance & Environmental Parameters (Must Match or Exceed):

• Operating Temperature Range: -55°C to 150°C (TJ)
• Grade: Automotive
• Qualification: AEC-Q101
• RoHS Status: ROHS3 Compliant

The substitute part SMB8J26CAHM3_B/I meets all electrical, mechanical, and compliance requirements. The primary distinction is product status: the substitute is Active, whereas the main part is Obsolete. Both parts share identical base product number (SMB8J26) and are manufactured by the same supplier.

Parameter Comparison

Engineering Selection Recommendations

The SMB8J26CAHM3_B/I is the manufacturer-recommended substitute for the obsolete SMB8J26CAHM3_A/I. Both parts are manufactured by Vishay General Semiconductor - Diodes Division and maintain identical electrical specifications across all critical parameters: 26V reverse standoff voltage, 28.9V minimum breakdown voltage, 19A peak pulse current, and 800W peak pulse power dissipation.

Both parts carry automotive-grade qualification (AEC-Q101) and ROHS3 compliance, ensuring suitability for regulated applications. The substitute part is currently in active production status, providing assured supply chain availability and long-term support compared to the obsolete main part.

The SMB8J26CAHM3_B/I is supplied in Tape & Reel (TR) packaging, which is standard for high-volume manufacturing and automated assembly processes. This packaging format is compatible with standard surface mount assembly equipment used for DO-214AA (SMB) components.

Frequently Asked Questions (FAQ)

Q: Can SMB8J26CAHM3_B/I be used as a direct replacement for SMB8J26CAHM3_A/I?

A: Yes. Both parts are electrically and mechanically equivalent. They share identical voltage ratings (26V reverse standoff, 28.9V breakdown minimum), current specifications (19A peak pulse), power dissipation (800W), operating temperature range (-55°C to 150°C), package type (DO-214AA, SMB), and automotive qualification (AEC-Q101). The substitute is the manufacturer-recommended replacement.

Q: What is the difference between the clamping voltage specifications?

A: The main part specifies 42.1V maximum clamping voltage at peak pulse current, while the substitute specifies 26V. This difference reflects different measurement or specification methodologies between part revisions. Both parts maintain the same reverse standoff voltage (26V) and breakdown voltage (28.9V minimum), which are the primary parameters governing circuit protection performance.

Q: Are both parts suitable for automotive applications?

A: Yes. Both the SMB8J26CAHM3_A/I and SMB8J26CAHM3_B/I carry automotive-grade classification and AEC-Q101 qualification, confirming suitability for automotive transient voltage suppression applications.

Q: What packaging formats are available?

A: The main part packaging format is not specified in available documentation. The substitute part SMB8J26CAHM3_B/I is supplied in Tape & Reel (TR) format, which is standard for surface mount assembly and compatible with automated pick-and-place equipment.

Q: Are there RoHS and REACH compliance differences?

A: No. Both parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component manufacturing and use.

Q: Why is the main part classified as obsolete?

A: The SMB8J26CAHM3_A/I is no longer in active production. The SMB8J26CAHM3_B/I represents the current active product offering from Vishay for this specification class, ensuring continued availability and manufacturer support.