SMBJ120CA-M3/52 Equivalent & Substitute Parts

Part Overview

The SMBJ120CA-M3/52 is a bidirectional transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the DO-214AA (SMB) package and is designed for general-purpose transient protection applications. The part is active in production status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Equivalent and substitute parts are identified based on matching electrical performance parameters within the SMBJ120 voltage class and compatible mechanical specifications.

Substiute Parts

SMBJ120CA-M3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 1182SMBJ120CA-M3/52 Datasheet

Current PartRFQ

SMBJ120CD-M3/H

Vishay General Semiconductor - Diodes DivisionIn Stock: 1114SMBJ120CD-M3/H Datasheet

DirectRFQ

SMBJ120CA

MeritekIn Stock: 34486SMBJ120CA Datasheet

DirectRFQ

SMBJ120CA-13-F

Diodes IncorporatedIn Stock: 3955SMBJ120CA-13-F Datasheet

DirectRFQ

SMBJ120CA-TP

Micro Commercial CoIn Stock: 2383SMBJ120CA-TP Datasheet

DirectRFQ

SMBJ100CA

Good-Ark SemiconductorIn Stock: 20340SMBJ100CA Datasheet

MFR RecommendedRFQ

SMBJ100CA

Good-Ark SemiconductorIn Stock: 20340SMBJ100CA Datasheet

MFR RecommendedRFQ

SMBJ110CA

Fairchild SemiconductorIn Stock: 44388SMBJ110CA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMBJ120CA-M3/52 are classified into two categories based on electrical and mechanical compatibility:

Direct Equivalents (Identical Electrical Performance): Parts that maintain the 120V reverse standoff voltage, 193V clamping voltage, 3.1A peak pulse current, and 600W peak pulse power rating within specified tolerances. These parts are interchangeable in applications where the SMBJ120CA-M3/52 is specified. Direct equivalents include SMBJ120CD-M3/H, SMBJ120CA (Meritek), SMBJ120CA-13-F (Diodes Incorporated), and SMBJ120CA-TP (Micro Commercial Co).

Manufacturer-Recommended Alternatives (Lower Voltage Rating): Parts that operate at reduced reverse standoff voltages (100V or 110V) with correspondingly lower clamping voltages. These alternatives are suitable only for applications where the lower voltage rating is acceptable. This category includes SMBJ100CA (100V standoff, 162V clamp) and SMBJ110CA (110V standoff, 177V clamp).

All substitute parts maintain the DO-214AA (SMB) surface mount package, bidirectional zener diode topology, and general-purpose application classification. Compliance certifications (RoHS3, REACH Unaffected, EAR99) are consistent across all listed substitutes.

Parameter Comparison

Engineering Selection Recommendations

For Direct Substitution: Select SMBJ120CD-M3/H, SMBJ120CA (Meritek), SMBJ120CA-13-F, or SMBJ120CA-TP when the application requires 120V reverse standoff voltage protection. All direct equivalents maintain active product status and full RoHS3 compliance. SMBJ120CA-TP offers extended operating temperature range to 175°C, suitable for high-temperature environments. SMBJ120CD-M3/H provides marginally lower clamping voltage (190V vs. 193V) with slightly higher peak pulse current (3.15A vs. 3.1A), both within acceptable tolerance for general-purpose transient suppression.

For Lower Voltage Applications: SMBJ100CA and SMBJ110CA are manufacturer-recommended alternatives only when circuit design permits reduced voltage standoff ratings. SMBJ100CA operates at 100V standoff with 162V clamping voltage and higher peak pulse current (3.7A). SMBJ110CA operates at 110V standoff with 177V clamping voltage and 3.4A peak pulse current. These parts are not interchangeable with the SMBJ120CA-M3/52 in circuits requiring 120V protection.

All listed parts maintain DO-214AA (SMB) surface mount packaging, ensuring mechanical compatibility with existing PCB layouts and assembly processes. Compliance status (RoHS3, REACH Unaffected, EAR99) is consistent across all substitutes.

Frequently Asked Questions (FAQ)

Q: Can SMBJ120CA-TP replace SMBJ120CA-M3/52 directly? A: Yes. SMBJ120CA-TP is a direct electrical equivalent with identical 120V standoff, 193V clamping voltage, and 3.1A peak pulse current. The extended operating temperature range (-55 to 175°C vs. -55 to 150°C) provides additional thermal margin without affecting circuit performance.

Q: What is the difference between SMBJ120CD-M3/H and SMBJ120CA-M3/52? A: Both maintain 120V reverse standoff voltage and 600W peak pulse power. SMBJ120CD-M3/H has a maximum clamping voltage of 190V (vs. 193V) and peak pulse current of 3.15A (vs. 3.1A). These differences fall within normal manufacturing tolerances for the SMBJ120 voltage class and do not affect functional compatibility.

Q: Why are SMBJ100CA and SMBJ110CA listed as substitutes if they have different voltage ratings? A: SMBJ100CA and SMBJ110CA are manufacturer-recommended alternatives for applications where lower voltage protection is acceptable. They are not direct replacements for the SMBJ120CA-M3/52 but represent the next lower voltage options within the SMBJ series. Circuit design must confirm that 100V or 110V standoff voltage is suitable before substitution.

Q: Are all substitute parts available in the same packaging? A: Yes. All listed substitute parts use the DO-214AA (SMB) surface mount package, ensuring compatibility with existing PCB layouts and automated assembly equipment.

Q: What compliance certifications apply to all substitute parts? A: All substitute parts listed are RoHS3 compliant, REACH Unaffected, and classified as EAR99 for export control purposes. Moisture sensitivity level (MSL 1) is unlimited for all parts.

Q: Can SMBJ120CA-M3/52 be used in place of SMBJ110CA? A: No. SMBJ120CA-M3/52 has a higher reverse standoff voltage (120V vs. 110V) and higher clamping voltage (193V vs. 177V). While it provides greater protection margin, it is not a direct substitute and may not be appropriate for circuits specifically designed for 110V protection.