SMCJ33CA-TP Equivalent & Substitute Parts

Part Overview

The SMCJ33CA-TP is a 33V Transient Voltage Suppressor (TVS) diode manufactured by Micro Commercial Co, designed for general-purpose transient protection applications. This surface-mount component features a 53.3V maximum clamping voltage, 28.2A peak pulse current capability, and 1500W peak pulse power rating in a DO-214AB (SMC) package. The part is Active status and ROHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Equivalent and substitute parts are identified when electrical parameters remain within acceptable tolerances for the application while maintaining mechanical compatibility with the DO-214AB surface-mount package.

Substiute Parts

SMCJ33CA-TP

Micro Commercial CoIn Stock: 5376SMCJ33CA-TP Datasheet

Current PartRFQ

SMCJ33CA

MDDIn Stock: 35139SMCJ33CA Datasheet

DirectRFQ

SMCJ33CA

MDDIn Stock: 35139SMCJ33CA Datasheet

DirectRFQ

SMCJ33CA-13-F

Diodes IncorporatedIn Stock: 5459SMCJ33CA-13-F Datasheet

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5.0SMDJ33CA

HY Electronic (Cayman) LimitedIn Stock: 389475.0SMDJ33CA Datasheet

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5.0SMDJ33CA-T7

Littelfuse Inc.In Stock: 488905.0SMDJ33CA-T7 Datasheet

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SMDJ33CA

Alpha & Omega Semiconductor Inc.In Stock: 36414SMDJ33CA Datasheet

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SMDJ33CA-T7

Littelfuse Inc.In Stock: 1100SMDJ33CA-T7 Datasheet

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SMLJ33CA

Bourns Inc.In Stock: 19218SMLJ33CA Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMCJ33CA-TP are categorized based on electrical parameter compatibility within the following criteria:

Direct Equivalents maintain identical electrical specifications:

• Voltage - Reverse Standoff: 33V
• Voltage - Breakdown (Min): 36.7V
• Voltage - Clamping (Max) @ Ipp: 53.3V
• Current - Peak Pulse: 28.2A (±tolerance)
• Power - Peak Pulse: 1500W
• Package: DO-214AB, SMC
• Type: Zener, Bidirectional, 1 Channel

Similar Substitutes share the same voltage and clamping characteristics but differ in peak pulse current and power dissipation capability. These parts are suitable for applications where higher transient current handling is acceptable or beneficial.

All substitute parts listed maintain:

• Identical reverse standoff voltage (33V)
• Identical breakdown voltage minimum (36.7V)
• Identical clamping voltage maximum (53.3V)
• Surface-mount DO-214AB (SMC) package compatibility
• Zener type, bidirectional, single-channel configuration
• ROHS3 compliance

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (Recommended for 1:1 Replacement):

SMCJ33CA (MDD) and SMCJ33CA-13-F (Diodes Incorporated) provide direct electrical equivalence to SMCJ33CA-TP with matching 28.2A peak pulse current and 1500W power dissipation. Both maintain ROHS3 compliance. Operating temperature range differs slightly; SMCJ33CA operates -50 to 150°C while SMCJ33CA-13-F extends to -55°C minimum, matching the original specification.

Higher Current Capacity Substitutes:

SMDJ33CA (Alpha & Omega Semiconductor Inc.), SMDJ33CA-T7 (Littelfuse Inc.), and SMLJ33CA (Bourns Inc.) provide 56.2–56.3A peak pulse current with 3000W power dissipation. These are suitable for applications requiring enhanced transient protection margin. All maintain 33V reverse standoff and 53.3V clamping voltage. SMDJ33CA-T7 extends operating temperature to -65°C.

Maximum Current Capacity Substitutes:

5.0SMDJ33CA (HY Electronic) and 5.0SMDJ33CA-T7 (Littelfuse Inc.) deliver 93.9A peak pulse current with 5000W power dissipation. These are applicable where significantly higher transient energy absorption is required. Both support -65 to 150°C operating range and maintain ROHS3 compliance.

All listed substitutes are Active status products with ROHS3 compliance and MSL 1 (unlimited) moisture sensitivity rating.

Frequently Asked Questions (FAQ)

Q: Can SMCJ33CA-TP be replaced with SMCJ33CA from MDD?

A: Yes. Both parts share identical electrical specifications: 33V reverse standoff, 36.7V breakdown minimum, 53.3V clamping maximum, 28.2A peak pulse current, and 1500W power dissipation. Operating temperature range differs slightly (-50 to 150°C vs. -55 to 175°C); verify application requirements before substitution.

Q: What is the difference between SMCJ33CA-TP and SMDJ33CA?

A: Both maintain identical voltage parameters (33V standoff, 53.3V clamping). SMDJ33CA provides double the peak pulse current (56.3A vs. 28.2A) and power dissipation (3000W vs. 1500W). SMDJ33CA is suitable for applications requiring higher transient protection margin. Package and compliance remain identical.

Q: Are 5.0SMDJ33CA and 5.0SMDJ33CA-T7 interchangeable with SMCJ33CA-TP?

A: Electrically, yes, for voltage parameters. Both maintain 33V reverse standoff and 53.3V clamping voltage. However, they provide significantly higher current capacity (93.9A vs. 28.2A) and power dissipation (5000W vs. 1500W). These are suitable only if the application can accommodate higher transient energy absorption without circuit impact.

Q: Does package compatibility affect substitution?

A: All listed substitutes use DO-214AB (SMC) surface-mount package. Mechanical and electrical footprint compatibility is maintained across all parts. Verify PCB layout and thermal management design for parts with higher power dissipation ratings.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitutes maintain ROHS3 compliance and MSL 1 (unlimited) moisture sensitivity level, matching the original SMCJ33CA-TP specification.

Q: Which substitute offers the widest operating temperature range?

A: SMCJ33CA-TP (original) supports -55 to 175°C. Among substitutes, SMDJ33CA-T7 and 5.0SMDJ33CA-T7 extend to -65°C minimum but are limited to 150°C maximum. For applications requiring the full -55 to 175°C range, the original part or MDD SMCJ33CA with verified thermal performance is recommended.