SMCJ36C Equivalent & Substitute Parts

Part Overview

The SMCJ36C is a 36V Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component features a 61.01V maximum clamping voltage, 25.9A peak pulse current capability, and 1500W peak pulse power rating in a DO-214AB (SMC) package. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	36V
Voltage - Breakdown (Min)	37.89V
Voltage - Clamping (Max) @ Ipp	61.01V
Current - Peak Pulse (10/1000µs)	25.9A
Power - Peak Pulse	1500W
Operating Temperature Range	-55°C to 150°C (TJ)
Mounting Type	Surface Mount
Package / Case	DO-214AB, SMC
Type	Zener
Bidirectional Channels	1
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the SMCJ36C is determined by the following critical electrical and mechanical parameters:

Reverse Standoff Voltage: 36V (all substitutes maintain this specification)
Voltage Clamping Range: 58.1V to 64.3V (acceptable variation from original 61.01V)
Peak Pulse Current: 25.8A to 51.6A (minimum 25.8A required for compatibility)
Peak Pulse Power: 1500W to 3000W (minimum 1500W required)
Package Type: DO-214AB / SMC (surface mount, same footprint)
Operating Temperature: -55°C to 175°C (minimum -55°C required)
Compliance: ROHS3 Compliant, MSL 1

Substitute parts are grouped into two categories based on peak pulse current capability:

Category A (1500W / 25.8-25.9A): Direct electrical equivalents with identical power and current ratings. Suitable for direct replacement in existing designs.

Category B (3000W / 51.6A): Enhanced performance substitutes with doubled power and current ratings. Provide superior transient suppression capability while maintaining electrical compatibility.

Parameter Comparison

Part Number	Manufacturer	Voltage Standoff (V)	Voltage Clamp (V)	Peak Pulse Current (A)	Peak Pulse Power (W)	Temp Range (°C)	Package	Status
SMCJ36C	Littelfuse Inc.	36	61.01	25.9	1500	-55 to 150	DO-214AB	Obsolete
SMCJ36CA	EVVO Semi	36	58.1	25.9	1500	-55 to 150	SMC	Active
SMCJ36CA-13-F	Diodes Incorporated	36	58.1	25.8	1500	-55 to 150	SMC	Active
SMCJ36CA-TP	Micro Commercial Co	36	58.1	25.9	1500	-55 to 175	DO-214AB	Active
SMCJ36CAE3/TR13	Microchip Technology	36	58.1	25.8	1500	-65 to 150	DO-214AB	Active
SMCJ36CE3/TR13	Microchip Technology	36	64.3	23.3	1500	-65 to 150	DO-214AB	Active
SMC3K36CA-M3/57	Vishay General Semiconductor	36	58.1	51.6	3000	-55 to 150	DO-214AB	Active
SMLJ36CA	Bourns Inc.	36	58.1	51.6	3000	-55 to 150	SMC	Active
SMLJ36CA-TP	Micro Commercial Co	36	58.1	51.6	3000	-55 to 175	SMC	Active

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance)

SMCJ36CA (EVVO Semi), SMCJ36CA-13-F (Diodes Incorporated), and SMCJ36CA-TP (Micro Commercial Co) provide equivalent 1500W / 25.9A performance. All are active products with ROHS3 compliance and MSL 1 rating. SMCJ36CA-TP offers extended operating temperature to 175°C, providing additional thermal margin for high-temperature applications.

For Enhanced Performance (Higher Current/Power Capability)

SMC3K36CA-M3/57 (Vishay), SMLJ36CA (Bourns), and SMLJ36CA-TP (Micro Commercial Co) deliver 3000W / 51.6A capability, doubling the transient suppression capacity. These parts maintain 36V standoff voltage and 58.1V clamping voltage while providing superior protection margin. SMLJ36CA-TP supports -55°C to 175°C operation.

Extended Temperature Range Options

SMCJ36CAE3/TR13 (Microchip Technology) and SMCJ36CE3/TR13 (Microchip Technology) extend the lower operating temperature to -65°C, suitable for applications requiring enhanced cold-temperature performance.

All substitute parts maintain ROHS3 compliance and MSL 1 moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can SMCJ36CA directly replace SMCJ36C in existing PCB designs?

A: Yes. SMCJ36CA maintains identical 36V standoff voltage, equivalent 58.1V clamping voltage (within acceptable tolerance of the original 61.01V), and matching 25.9A peak pulse current in the same DO-214AB package footprint. No PCB layout modifications are required.

Q: What is the difference between 1500W and 3000W rated parts?

A: The 1500W parts (SMCJ36CA series) handle 25.8-25.9A peak pulse current. The 3000W parts (SMC3K36CA, SMLJ36CA series) handle 51.6A peak pulse current, providing doubled transient suppression capacity. Both maintain the same 36V standoff and 58.1V clamping voltage. Selection depends on the severity of transient events in the application.

Q: Are there package differences between substitutes?

A: All substitutes use DO-214AB or SMC package designations, which are mechanically and electrically equivalent surface-mount packages. Verify specific supplier device package notation (DO-214AB vs. SMC) matches your PCB footprint library, though both are functionally identical.

Q: Which substitute offers the widest operating temperature range?

A: SMCJ36CA-TP and SMLJ36CA-TP both support -55°C to 175°C operation, extending the upper temperature limit by 25°C compared to the original SMCJ36C specification of -55°C to 150°C.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL 1 moisture sensitivity rating, meeting standard environmental and manufacturing requirements.

Q: What is the significance of clamping voltage variation (58.1V vs. 61.01V vs. 64.3V)?

A: Clamping voltage determines the maximum voltage spike the TVS diode allows across the protected circuit. The original SMCJ36C clamps at 61.01V. Substitutes range from 58.1V to 64.3V. Lower clamping voltage (58.1V) provides tighter protection; higher clamping voltage (64.3V) allows slightly higher transient peaks. Selection depends on the protected component's voltage tolerance specifications.

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