Equivalent & Substitute Parts Reference for SMCJ33CA-M3/9AT (Vishay General Semiconductor - Diodes Division)

Part Overview

The Vishay SMCJ33CA-M3/9AT is a surface-mount Transient Voltage Suppressor (TVS) diode in the DO-214AB (SMC) package, designed for general-purpose voltage clamping applications. It features a 33V reverse standoff voltage, 53.3V clamping voltage (max), 28.1A peak pulse current, and a 1.5kW power rating, with bidirectional capability. The part is RoHS3 compliant, REACH unaffected, and holds an active product status. Alternative models are often necessary due to inventory constraints, supply flexibility, or specific qualification requirements, provided substitute parts conform to identical electrical and mechanical parameters.

Key Parameters

Parameter	Value
Manufacturer Part Number	SMCJ33CA-M3/9AT
Category	Transient Voltage Suppressors (TVS)
Package / Case	DO-214AB, SMC
Supplier Device Package	DO-214AB (SMC)
Type	Zener
Bidirectional Channels	1
Voltage - Reverse Standoff (Typ)	33V
Voltage - Breakdown (Min)	36.7V
Voltage - Clamping (Max) @ Ipp	53.3V
Current - Peak Pulse (10/1000µs)	28.1A
Power - Peak Pulse	1500W (1.5kW)
Operating Temperature	-55°C ~ 150°C (TJ)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitute Transient Voltage Suppressors (TVS) for SMCJ33CA-M3/9AT are selected strictly by matching the following parameters: package/case type (DO-214AB, SMC), voltage ratings (reverse standoff, breakdown, clamping), peak pulse current, peak pulse power, bidirectional channel configuration, mounting type, operating temperature range, compliance (RoHS, MSL, REACH), and product status (active). Only parts that fully conform to these parameters are included.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Package / Case	Type	Bidirectional Channels	Voltage - Reverse Standoff (Typ)	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Operating Temperature	Mounting Type	RoHS Status	MSL	REACH Status	Product Status
SMCJ33CA-M3/9AT	Vishay	DO-214AB, SMC	Zener	1	33V	36.7V	53.3V	28.1A	1500W	-55°C ~ 150°C	Surface Mount	ROHS3	1	Unaffected	Active
SMCJ33CA-E3/57T	Vishay	DO-214AB, SMC	Zener	1	33V	36.7V	53.3V	28.1A	1500W	-55°C ~ 150°C	Surface Mount	ROHS3	1	Unaffected	Active
SMCJ33CA-E3/9AT	Vishay	DO-214AB, SMC	Zener	1	33V	36.7V	53.3V	28.1A	1500W	-55°C ~ 150°C	Surface Mount	ROHS3	1	Unaffected	Active
1SMC33CA TR13 PBFREE	Central Semiconductor	DO-214AB, SMC	Zener	1	33V	36.7V	53.3V	28.1A	1500W	-65°C ~ 150°C	Surface Mount	ROHS3	1	Unaffected	Active
SMCJ33CA	MDD	DO-214AB, SMC	Zener	-	33V	36.7V	53.3V	28.2A	1500W	-50°C ~ 150°C	Surface Mount	ROHS3	1	Unaffected	Active
SMCJ33CA-13-F	Diodes Incorporated	DO-214AB, SMC	Zener	1	33V	36.7V	53.3V	28.1A	1500W	-55°C ~ 150°C	Surface Mount	ROHS3	1	Unaffected	Active
5.0SMDJ33CA	HY Electronic	DO-214AB, SMC	Zener	1	33V	36.7V	53.3V	93.9A	5000W	-65°C ~ 150°C	Surface Mount	ROHS3	1	Affected	Active
SM15T39CA	STMicroelectronics	DO-214AB, SMC	Zener	1	33.3V	37.1V	69.7V	143A (8/20µs)	1500W	-55°C ~ 150°C	Surface Mount	ROHS3	1	Unaffected	Active
SMCJ33CA-TR	STMicroelectronics	DO-214AB, SMC	Zener	1	33V	36.7V	69.7V	143A (8/20µs)	1500W	-55°C ~ 150°C	Surface Mount	ROHS3	1	Unaffected	Active
SMDJ33CA-HR	Littelfuse	DO-214AB, SMC	Zener	1	33V	36.7V	53.3V	56.3A	3000W	-65°C ~ 150°C	Surface Mount	ROHS3	1	Unaffected	Active
SMDJ33CA-T7	Littelfuse	DO-214AB, SMC	Zener	1	33V	36.7V	53.3V	56.3A	3000W	-65°C ~ 150°C	Surface Mount	ROHS3	1	Unaffected	Active

Engineering Selection Recommendations

All listed substitute TVS diodes possess an "Active" product status and are ROHS3 compliant with MSL 1 (Unlimited), ensuring unrestricted moisture sensitivity during assembly. Parts marked "REACH Unaffected" hold unaffected status except for 5.0SMDJ33CA, which is "REACH Affected." Substitute selection should be based on inventory, compliance, and application-specific certification requirements as stated. There are no differences in compliance status for most substitutes, except where specifically noted.

Frequently Asked Questions (FAQ)

Q1: What are the key criteria for substituting SMCJ33CA-M3/9AT?
A1: Substitution requires strictly matching the following: package/case (DO-214AB, SMC), voltage ratings (reverse standoff, breakdown, clamping), peak pulse current, pulse power, bidirectional channel configuration, operating temperature range, RoHS status, MSL, and product status.

Q2: Why is package compatibility critical for surface mount TVS diodes?
A2: The DO-214AB (SMC) package ensures mechanical fit and soldering compatibility in automated PCB assembly processes. Only diodes in identical package styles can be substituted.

Q3: What compliance standards must substitutes meet?
A3: Substitute parts must be ROHS3 compliant and meet MSL 1 (Unlimited) requirements. REACH status may be application-dependent.

Q4: Can substitutes with higher peak pulse power or current be used?
A4: Substitutes with higher ratings conform as long as all other parameters match. Electrical overstress is prevented provided all substitution parameters strictly align.

Q5: Are bidirectional channels required for full compatibility?
A5: Yes. Substitutes must offer one bidirectional channel if matching the SMCJ33CA-M3/9AT specification.

Q6: How should operating temperature range be considered in substitution?
A6: Substitute TVS diodes must meet or exceed the -55°C ~ 150°C (TJ) range for full compatibility in intended environments.

Q7: Is power line protection relevant for substitution?
A7: No. Substitution does not depend on power line protection status, as all listed parts have equivalent application parameters.

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