SMCJ33C Transient Voltage Suppressor - Equivalent & Substitute Parts

Part Overview

The SMCJ33C is a 1500W bidirectional transient voltage suppressor (TVS) diode manufactured by Taiwan Semiconductor Corporation. This surface mount component operates at a 33V reverse standoff voltage with a 59V maximum clamping voltage and 26A peak pulse current capability. The device is designed for general-purpose transient protection applications and is classified as an active product with full RoHS3 compliance.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained across the specified parameter ranges for TVS diode applications.

Substiute Parts

SMCJ33C

Taiwan Semiconductor CorporationIn Stock: 954SMCJ33C Datasheet

Current PartRFQ

SMCJ33CA

MDDIn Stock: 35139SMCJ33CA Datasheet

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SMCJ33CA

MDDIn Stock: 35139SMCJ33CA Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMCJ33C are identified based on strict equivalence of the following critical parameters:

Electrical Equivalence Criteria:

• Voltage - Reverse Standoff (Typ): 33V
• Voltage - Breakdown (Min): 36.7V
• Power - Peak Pulse: 1500W
• Type: Zener, Bidirectional

Mechanical Equivalence Criteria:

• Package / Case: DO-214AB (SMC)
• Mounting Type: Surface Mount
• Category: Transient Voltage Suppressors (TVS)

Compliance Criteria:

• RoHS3 Compliant
• REACH Unaffected
• Active Product Status

The SMCJ33CA meets all substitution criteria. Variations in clamping voltage (53.3V vs. 59V) and peak pulse current (28.2A vs. 26A) remain within the functional operating envelope for general-purpose TVS applications while maintaining the same power dissipation rating and package form factor.

Parameter Comparison

Engineering Selection Recommendations

Both the SMCJ33C and SMCJ33CA are active products with full RoHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic component procurement.

The SMCJ33CA is electrically and mechanically compatible with the SMCJ33C for general-purpose TVS applications. Both devices share identical reverse standoff voltage (33V), breakdown voltage (36.7V minimum), peak pulse power (1500W), and package form factor (DO-214AB SMC surface mount).

The SMCJ33CA operates within a narrower temperature range (-50°C to 150°C versus -55°C to 150°C), which is suitable for standard industrial and commercial applications. The lower clamping voltage (53.3V) and higher peak pulse current (28.2A) of the SMCJ33CA represent improved transient suppression characteristics within the same power envelope.

Component selection between these parts should be based on specific application temperature requirements and inventory availability.

Frequently Asked Questions (FAQ)

Q: Can SMCJ33CA directly replace SMCJ33C in existing designs?

A: Yes. Both devices share the same reverse standoff voltage (33V), breakdown voltage (36.7V minimum), peak pulse power rating (1500W), and DO-214AB SMC package. Electrical and mechanical compatibility is maintained for general-purpose TVS applications.

Q: What is the difference in clamping voltage between these parts?

A: The SMCJ33C has a maximum clamping voltage of 59V, while the SMCJ33CA clamps at 53.3V. Both values fall within acceptable transient suppression ranges for 33V standoff applications. The lower clamping voltage of the SMCJ33CA provides tighter voltage regulation during transient events.

Q: Are there temperature range differences?

A: The SMCJ33C operates from -55°C to 150°C, while the SMCJ33CA operates from -50°C to 150°C. For applications requiring operation below -50°C, the SMCJ33C is required. For standard industrial temperature ranges, both parts are suitable.

Q: Do both parts meet current compliance standards?

A: Yes. Both the SMCJ33C and SMCJ33CA are RoHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component use in regulated markets.

Q: Is the package form factor identical?

A: Yes. Both parts use the DO-214AB (SMC) surface mount package, ensuring identical PCB footprint and reflow soldering compatibility.

Q: What is the peak pulse current difference?

A: The SMCJ33C is rated for 26A peak pulse current, while the SMCJ33CA is rated for 28.2A. Both maintain the same 1500W peak pulse power rating. The higher current rating of the SMCJ33CA indicates improved pulse handling capability within the same power envelope.