SMCJ22C Transient Voltage Suppressor - Equivalent & Substitute Parts

Part Overview

The SMCJ22C is a 1500W bidirectional transient voltage suppressor (TVS) diode manufactured by Taiwan Semiconductor Corporation. This surface mount component operates with a 22V reverse standoff voltage and provides transient protection in general-purpose applications. The device is classified as Active product status and is RoHS3 compliant. Substitute parts are identified to provide alternative sourcing options when the primary component becomes unavailable or when inventory requirements necessitate alternative suppliers.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	22	V
Voltage - Breakdown (Min)	24.4	V
Voltage - Clamping (Max) @ Ipp	39.4	V
Current - Peak Pulse (10/1000µs)	39	A
Power - Peak Pulse	1500	W
Operating Temperature Range	-55 to 150	°C
Mounting Type	Surface Mount	-
Package / Case	DO-214AB (SMC)	-
Bidirectional Channels	1	-
Type	Zener	-

Substitute Part Grouping Explanation

Substitute parts for the SMCJ22C are identified based on strict electrical and mechanical parameter alignment within the TVS diode category. The substitution criteria are:

Critical Parameters for Substitution:

Voltage - Reverse Standoff (Typ): 22V
Voltage - Breakdown (Min): 24.4V
Power - Peak Pulse: 1500W
Bidirectional Channels: 1
Mounting Type: Surface Mount
Package / Case: DO-214AB (SMC)
Operating Temperature Range: -55°C to 150°C
Type: Zener
Series: SMCJ

The SMCJ22CA from Meritek meets all critical electrical and mechanical parameters required for direct substitution. Both components share identical reverse standoff voltage, breakdown voltage, peak pulse power rating, package configuration, and operating temperature specifications. Variations in clamping voltage and peak pulse current remain within acceptable tolerance ranges for the SMCJ series classification.

Parameter Comparison

Parameter	SMCJ22C (Taiwan Semiconductor)	SMCJ22CA (Meritek)	Unit
Voltage - Reverse Standoff (Typ)	22	22	V
Voltage - Breakdown (Min)	24.4	24.4	V
Voltage - Clamping (Max) @ Ipp	39.4	35.5	V
Current - Peak Pulse (10/1000µs)	39	42.25	A
Power - Peak Pulse	1500	1500	W
Operating Temperature Range	-55 to 150	-55 to 150	°C
Mounting Type	Surface Mount	Surface Mount	-
Package / Case	DO-214AB (SMC)	DO-214AB (SMC)	-
Bidirectional Channels	1	1	-
Type	Zener	Zener	-
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	-
REACH Status	REACH Unaffected	REACH Unaffected	-

Engineering Selection Recommendations

Both the SMCJ22C and SMCJ22CA are Active product status components with full RoHS3 compliance and REACH unaffected status. Selection between these parts is based on availability and inventory requirements rather than technical performance differentiation.

The SMCJ22C (Taiwan Semiconductor Corporation) maintains 1099 pieces in current inventory. The SMCJ22CA (Meritek) maintains 56100 pieces in current inventory, providing significantly higher stock availability for high-volume applications or extended supply chain requirements.

Both components satisfy identical electrical specifications for the 22V reverse standoff voltage class and deliver 1500W peak pulse power in the DO-214AB (SMC) surface mount package. The SMCJ22CA exhibits lower clamping voltage (35.5V versus 39.4V) and higher peak pulse current capability (42.25A versus 39A), representing performance characteristics within the SMCJ series tolerance band.

Frequently Asked Questions (FAQ)

Q: Can SMCJ22CA replace SMCJ22C in existing designs?

A: Yes. Both components share identical reverse standoff voltage (22V), breakdown voltage (24.4V), peak pulse power (1500W), operating temperature range (-55°C to 150°C), and DO-214AB (SMC) package configuration. The SMCJ22CA operates within SMCJ series electrical specifications.

Q: What are the differences between SMCJ22C and SMCJ22CA?

A: The primary differences are manufacturer (Taiwan Semiconductor Corporation versus Meritek) and specific performance characteristics. SMCJ22CA provides lower clamping voltage (35.5V versus 39.4V) and higher peak pulse current (42.25A versus 39A). Both maintain identical 1500W power rating and 22V reverse standoff voltage.

Q: Are both parts RoHS3 compliant?

A: Yes. Both SMCJ22C and SMCJ22CA are RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What is the package configuration for these TVS diodes?

A: Both components use the DO-214AB (SMC) surface mount package, enabling direct board-level substitution without layout modifications.

Q: Which part should be selected for new designs?

A: Selection is based on inventory availability and supply chain strategy. The SMCJ22CA offers significantly higher stock availability (56100 pieces versus 1099 pieces), making it suitable for high-volume production. Both parts meet identical electrical requirements for 22V transient voltage suppression applications.

Q: Are there any temperature operating differences?

A: No. Both components operate across the identical temperature range of -55°C to 150°C (junction temperature).

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