SMLJ7.5CE3/TR13 Equivalent & Substitute Parts

Part Overview

The SMLJ7.5CE3/TR13 is an active-status transient voltage suppressor (TVS) diode manufactured by Microchip Technology. This surface-mount component provides bidirectional overvoltage protection for general-purpose applications with a 7.5V reverse standoff voltage and 14.3V maximum clamping voltage. Alternative equivalent parts are necessary when primary inventory is unavailable, when thermal requirements exceed the main part's 300W peak pulse power rating, or when supply-chain constraints require substitution with compatible devices from alternative manufacturers.

Substiute Parts

SMLJ7.5CE3/TR13

Microchip TechnologyIn Stock: 1106SMLJ7.5CE3/TR13 Datasheet

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SMCJ7.5CA

Taiwan Semiconductor CorporationIn Stock: 15184SMCJ7.5CA Datasheet

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SMCJ7.5CA

Taiwan Semiconductor CorporationIn Stock: 15184SMCJ7.5CA Datasheet

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SMCJ7.5CA-13-F

Diodes IncorporatedIn Stock: 6330SMCJ7.5CA-13-F Datasheet

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SMDJ7.5CA

Alpha & Omega Semiconductor Inc.In Stock: 22863SMDJ7.5CA Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution compatibility for the SMLJ7.5CE3/TR13 is determined by the following criteria:

Critical Parameters:

• Voltage - Reverse Standoff: 7.5V (must match)
• Voltage - Breakdown (Min): 8.33V (must match)
• Voltage - Clamping (Max) @ Ipp: acceptable range 12.9V to 14.3V
• Operating Temperature: -55°C ~ 150°C (TJ) (must match)
• Mounting Type: Surface Mount (must match)
• Package / Case: DO-214AB or SMC variant (must match)

Thermal Capability:

• Peak Pulse Power: 300W minimum (substitutes with higher ratings acceptable)

Compliance:

• RoHS Status: ROHS3 Compliant (all substitutes must maintain compliance)
• Product Status: Active (all candidates are active products)

All substitute parts maintain the same reverse standoff voltage, breakdown voltage, operating temperature range, and surface-mount form factor. Variations occur in clamping voltage (within acceptable tolerance), peak pulse current, and peak pulse power dissipation.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts maintain ROHS3 compliance and active product status, confirming their suitability for new designs and ongoing production.

SMCJ7.5CA (Taiwan Semiconductor Corporation): This substitute provides 1500W peak pulse power compared to the main part's 300W, enabling thermal margin in high-transient environments. The 12.9V clamping voltage is within acceptable tolerance for 7.5V standoff protection circuits. Peak pulse current of 122A remains within the protection range of the protected circuit.

SMCJ7.5CA-13-F (Diodes Incorporated): Functionally identical to the TSC variant with 1500W peak pulse power and 12.9V clamping voltage. Supplied in Tape & Reel packaging, matching the form factor of the primary part.

SMDJ7.5CA (Alpha & Omega Semiconductor Inc.): This variant offers the highest thermal capability at 3000W peak pulse power with the highest peak pulse current of 232.6A. The 12.9V clamping voltage remains within compatible range. Selection of this part addresses the most demanding transient protection requirements.

Selection between substitute parts depends on thermal requirements and circuit current-handling expectations rather than voltage protection parameters, as all candidates maintain equivalent voltage-based protection characteristics.

Frequently Asked Questions (FAQ)

Q: Are the substitute parts pin-compatible with the SMLJ7.5CE3/TR13? A: Yes. All substitute parts use the same DO-214AB or SMC surface-mount package, ensuring identical PCB footprint and placement compatibility.

Q: What does the difference in clamping voltage (14.3V vs. 12.9V) mean for circuit protection? A: The clamping voltage represents the maximum voltage the TVS diode will clamp transients to during a surge event. The SMLJ7.5CE3/TR13 clamps at 14.3V while the substitute parts clamp at 12.9V. For circuits with maximum tolerable voltage specifications above 14.3V, the substitute parts (with lower clamping voltage) provide more conservative protection and are directly interchangeable. For circuits with tighter voltage margins, verify that 12.9V clamping meets design requirements.

Q: How do I select between the three substitute options? A: Selection is based on peak pulse power dissipation requirements. The SMCJ7.5CA and SMCJ7.5CA-13-F variants provide 1500W thermal capacity suitable for moderate transient environments. The SMDJ7.5CA provides 3000W capacity for high-energy transient protection. All three maintain identical voltage protection characteristics at 7.5V standoff.

Q: Will my circuit require design changes if I substitute these parts? A: No design changes are required. All substitute parts maintain the same voltage standoff, operating temperature range, and package footprint. Substitution is a direct drop-in replacement at the component level.

Q: Are all substitute parts ROHS3 compliant? A: Yes. The SMLJ7.5CE3/TR13 and all substitute parts (SMCJ7.5CA, SMCJ7.5CA-13-F, and SMDJ7.5CA) are ROHS3 compliant and REACH unaffected, meeting environmental compliance requirements for current manufacturing standards.

Q: What is the difference between TSC, Diodes Inc., and AOS variants? A: All three manufacturers produce functionally equivalent 7.5V TVS diodes within the SMCJ7.5 series. Differences are in peak pulse power ratings (1500W vs. 3000W for AOS) and inventory availability. Selection between manufacturers is based on thermal margin requirements and component availability in your supply chain.