SMCJ13C Transient Voltage Suppressor - Equivalent & Substitute Parts

Part Overview

The SMCJ13C is a 1500W bidirectional transient voltage suppressor (TVS) diode manufactured by Taiwan Semiconductor Corporation. This surface mount component operates in the DO-214AB (SMC) package and provides general-purpose transient protection with a 13V reverse standoff voltage and 23.8V maximum clamping voltage. The part is currently in active production status with 1101 units in stock. Alternative equivalent parts are necessary when primary inventory is unavailable or when sourcing from multiple qualified manufacturers is required for supply chain resilience.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	13	V
Voltage - Breakdown (Min)	14.4	V
Voltage - Clamping (Max) @ Ipp	23.8	V
Current - Peak Pulse (10/1000µs)	66	A
Power - Peak Pulse	1500	W
Operating Temperature Range	-55 to 150	°C
Package / Case	DO-214AB (SMC)	-
Mounting Type	Surface Mount	-
Bidirectional Channels	1	-
Type	Zener	-

Substitute Part Grouping Explanation

Substitution eligibility for the SMCJ13C is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

Reverse standoff voltage: 13V (Typ)
Breakdown voltage minimum: 14.4V
Bidirectional channel configuration: 1 channel
Zener diode type classification
Surface mount mounting type
DO-214AB (SMC) package / case designation
Operating temperature range: -55°C to 150°C

Allowable Variation Parameters:

Clamping voltage (Max) @ Ipp: Substitute must not exceed 23.8V
Peak pulse current (10/1000µs): Substitute must meet or exceed 66A
Peak pulse power: Substitute must meet or exceed 1500W

The SMCJ13CA from Fairchild Semiconductor qualifies as a direct substitute based on identical standoff voltage, breakdown voltage, package type, and operating temperature range. Variations in clamping voltage (21.5V vs 23.8V) and peak pulse current (69.8A vs 66A) remain within acceptable engineering tolerances for this product category.

Parameter Comparison

Parameter	SMCJ13C (Taiwan Semiconductor)	SMCJ13CA (Fairchild Semiconductor)	Compatibility
Voltage - Reverse Standoff (Typ)	13V	13V	Identical
Voltage - Breakdown (Min)	14.4V	14.4V	Identical
Voltage - Clamping (Max) @ Ipp	23.8V	21.5V	Compatible
Current - Peak Pulse (10/1000µs)	66A	69.8A	Compatible
Power - Peak Pulse	1500W	1500W	Identical
Operating Temperature Range	-55°C to 150°C	-55°C to 150°C	Identical
Package / Case	DO-214AB (SMC)	DO-214AB (SMC)	Identical
Mounting Type	Surface Mount	Surface Mount	Identical
Bidirectional Channels	1	1	Identical
Type	Zener	Zener	Identical
Series	SMCJ	SMCJ	Identical

Engineering Selection Recommendations

SMCJ13C (Taiwan Semiconductor Corporation) is the primary specification. This part maintains active product status with established supply availability (1101 units in stock). The component carries RoHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements.

SMCJ13CA (Fairchild Semiconductor) is a qualified equivalent substitute. This part also maintains active product status with higher inventory availability (15600 units in stock). The SMCJ13CA demonstrates superior peak pulse current capability (69.8A vs 66A) and lower clamping voltage (21.5V vs 23.8V), both favorable characteristics for transient suppression applications. The part carries identical regulatory compliance classifications (EAR99, HTSUS 8541.10.0080).

Selection between these parts should be based on procurement lead time, inventory availability, and established supplier relationships. Both parts are functionally equivalent for general-purpose transient voltage suppression applications requiring 13V standoff protection in surface mount DO-214AB packaging.

Frequently Asked Questions (FAQ)

Q: Can SMCJ13CA replace SMCJ13C in existing designs?

A: Yes. Both parts share identical reverse standoff voltage (13V), breakdown voltage (14.4V minimum), operating temperature range (-55°C to 150°C), and DO-214AB package configuration. The SMCJ13CA exhibits lower clamping voltage and higher peak pulse current, both compatible with SMCJ13C circuit requirements.

Q: What is the significance of the clamping voltage difference (23.8V vs 21.5V)?

A: The clamping voltage represents the maximum voltage across the TVS diode during transient suppression. The SMCJ13CA's lower clamping voltage (21.5V) provides improved transient suppression performance compared to the SMCJ13C specification (23.8V). This difference is favorable for circuit protection.

Q: Are there package compatibility concerns between these parts?

A: No. Both SMCJ13C and SMCJ13CA use identical DO-214AB (SMC) surface mount packaging. PCB footprints, reflow soldering profiles, and mechanical mounting requirements are identical.

Q: What does the peak pulse current difference (66A vs 69.8A) indicate?

A: The SMCJ13CA supports higher peak pulse current (69.8A) compared to the SMCJ13C specification (66A). This represents improved transient handling capability and provides additional design margin for surge protection applications.

Q: Are regulatory and compliance certifications equivalent?

A: Yes. Both parts carry identical ECCN (EAR99) and HTSUS (8541.10.0080) classifications. Both maintain RoHS3 compliance and REACH unaffected status, meeting current environmental regulations.

Q: What is the basis for substitution eligibility?

A: Substitution is based on matching critical electrical parameters: 13V reverse standoff voltage, 14.4V minimum breakdown voltage, 1-channel bidirectional configuration, Zener diode type, and identical operating temperature range. Both parts meet or exceed power dissipation requirements (1500W peak pulse).

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