SMBJ7.5CD-M3/I Equivalent & Substitute Parts

Part Overview

The SMBJ7.5CD-M3/I is a transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates as a bidirectional Zener diode in the TransZorb® series, designed for general-purpose transient voltage suppression applications. The part is currently active in production with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Equivalent and substitute parts are identified based on matching electrical performance parameters and mechanical compatibility within the DO-214AA (SMB) package format.

Substiute Parts

SMBJ7.5CD-M3/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1151SMBJ7.5CD-M3/I Datasheet

Current PartRFQ

SMBJ7.5CA-E3/5B

Vishay General Semiconductor - Diodes DivisionIn Stock: 2963SMBJ7.5CA-E3/5B Datasheet

MFR RecommendedRFQ

SMBJ7.5CA

MDDIn Stock: 45848SMBJ7.5CA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMBJ7.5CD-M3/I are qualified based on the following electrical and mechanical criteria:

Primary Matching Parameters:

• Voltage - Reverse Standoff (Typ): 7.5V
• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount
• Bidirectional Channels: 1
• Power - Peak Pulse: 600W
• RoHS3 Compliance

Acceptable Variation Range:

• Voltage - Clamping (Max) @ Ipp: 12.7V to 12.9V (±1.6% tolerance)
• Current - Peak Pulse (10/1000µs): 46.5A to 47.2A (±1.5% tolerance)
• Voltage - Breakdown (Min): 8.33V to 8.46V (±1.6% tolerance)
• Operating Temperature Range: -50°C to -55°C minimum; 150°C maximum

Parts meeting these criteria are electrically interchangeable and mechanically compatible for direct substitution in the same circuit application.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts meet the electrical and mechanical requirements for direct replacement of the SMBJ7.5CD-M3/I:

SMBJ7.5CA-E3/5B (Vishay): Maintains identical manufacturer lineage and operating temperature range (-55°C to 150°C). Clamping voltage variance of +0.2V and peak pulse current reduction of 0.7A fall within acceptable substitution tolerances. RoHS3 compliance and active product status confirm ongoing availability and regulatory alignment.

SMBJ7.5CA (MDD): Provides equivalent electrical performance with identical clamping voltage (12.9V) and peak pulse current (46.6A) to the Vishay substitute. Operating temperature minimum of -50°C represents a 5°C reduction from the main part specification. RoHS3 compliance and active product status support long-term supply continuity.

Selection between substitutes depends on application temperature requirements. Applications requiring full -55°C minimum operation should specify SMBJ7.5CA-E3/5B. Applications with -50°C minimum tolerance may use either substitute based on availability and cost considerations.

Frequently Asked Questions (FAQ)

Q: Can SMBJ7.5CA-E3/5B replace SMBJ7.5CD-M3/I in all applications?

A: Yes, within the specified operating temperature range of -55°C to 150°C. The electrical parameters (clamping voltage, peak pulse current, and power dissipation) are within acceptable substitution tolerances. Both parts use identical DO-214AA (SMB) packaging and surface mount configuration.

Q: What is the difference between SMBJ7.5CA-E3/5B and SMBJ7.5CA (MDD)?

A: Both parts meet the 7.5V reverse standoff specification and 600W peak pulse power rating. The primary difference is the minimum operating temperature: SMBJ7.5CA-E3/5B operates to -55°C, while SMBJ7.5CA (MDD) operates to -50°C. Clamping voltage and peak pulse current are equivalent between the two parts.

Q: Are there package compatibility concerns when substituting these parts?

A: No. All three parts use the DO-214AA (SMB) surface mount package. PCB footprints, solder pad dimensions, and mounting procedures are identical. No layout or assembly modifications are required.

Q: How do I verify electrical compatibility before substitution?

A: Confirm that your application circuit operates within the specified voltage and current ranges: reverse standoff voltage of 7.5V, clamping voltage between 12.7V and 12.9V, and peak pulse current between 46.5A and 47.2A. Verify that the operating temperature range of the substitute part meets your application requirements.

Q: What does RoHS3 compliance mean for these parts?

A: RoHS3 compliance indicates that these parts meet the Restriction of Hazardous Substances Directive requirements, restricting the use of specific hazardous materials including lead, cadmium, and mercury. All three parts carry RoHS3 certification, confirming regulatory alignment for industrial and commercial applications.

Q: Are these parts suitable for power line protection applications?

A: No. The specification data indicates "Power Line Protection: No" for all three parts. These components are designed for general-purpose transient voltage suppression in low-voltage signal and power circuits, not for direct power line protection.