SMCJ11A-TP Transient Voltage Suppressor Diode - Equivalent & Substitute Parts

Part Overview

The SMCJ11A-TP is a unidirectional transient voltage suppressor (TVS) diode manufactured by Micro Commercial Co, designed for general-purpose overvoltage protection in surface-mount applications. This component operates with an 11V reverse standoff voltage and provides 18.2V maximum clamping voltage at peak pulse current of 82.5A, delivering 1500W peak pulse power dissipation in a DO-214AB (SMC) package. The part is Active status and RoHS3 compliant, supplied in Tape & Reel packaging.

Equivalent and substitute parts are necessary when the original part number becomes unavailable, when alternative packaging formats are required, or when higher performance specifications (increased peak pulse current or power dissipation) are needed for enhanced circuit protection margins.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	11	V
Voltage - Breakdown (Min)	12.2	V
Voltage - Clamping (Max) @ Ipp	18.2	V
Current - Peak Pulse (10/1000µs)	82.5	A
Power - Peak Pulse	1500	W
Operating Temperature Range	-55 to 175	°C
Package / Case	DO-214AB, SMC	-
Mounting Type	Surface Mount	-
Type	Zener	-
Unidirectional Channels	1	-

Substitute Part Grouping Explanation

Substitute parts for the SMCJ11A-TP are classified based on strict electrical and mechanical parameter compatibility:

Direct Electrical Equivalents maintain identical voltage specifications (11V reverse standoff, 12.2V minimum breakdown, 18.2V maximum clamping) and current ratings (82.5A peak pulse), with variations only in manufacturer, packaging format, or operating temperature range. These parts are pin-for-pin compatible and functionally interchangeable in the same circuit application.

Higher Performance Substitutes maintain identical voltage parameters but provide increased peak pulse current (164.8A to 164.9A) and power dissipation (3000W), offering enhanced protection margins. These parts are mechanically and electrically compatible but deliver superior transient suppression capability.

Similar Specification Substitutes maintain the critical voltage parameters (11V to 11.1V reverse standoff, 18.2V clamping voltage) with minor variations in peak pulse current (86A) and power rating (1500W), suitable for applications where the voltage protection window is the primary design constraint.

Key parameters determining substitution eligibility:

Voltage - Reverse Standoff: 11V ± 0.1V tolerance
Voltage - Clamping (Max) @ Ipp: 18.2V (fixed)
Package / Case: DO-214AB, SMC (mandatory)
Mounting Type: Surface Mount (mandatory)
Unidirectional Channels: 1 (mandatory)

Parameter Comparison

Part Number	Manufacturer	Reverse Standoff (V)	Breakdown Min (V)	Clamping Max (V)	Peak Pulse Current (A)	Peak Pulse Power (W)	Operating Temp (°C)	Packaging
SMCJ11A-TP	Micro Commercial Co	11	12.2	18.2	82.5	1500	-55 to 175	Tape & Reel
SMCJ11A	Fairchild Semiconductor	11	12.2	18.2	82.5	1500	-55 to 150	Bulk
SMCJ11A-13-F	Diodes Incorporated	11	12.2	18.2	82.4	1500	-55 to 150	Tape & Reel
1.5SMC13A	Taiwan Semiconductor Corporation	11.1	12.4	18.2	86	1500	-55 to 150	Tape & Reel
SMDJ11A	Alpha & Omega Semiconductor Inc.	11	12.2	18.2	164.9	3000	-55 to 150	Tape & Reel
TPSMD11A	Littelfuse Inc.	11	12.2	18.2	164.8	3000	-65 to 150	Tape & Reel

Engineering Selection Recommendations

SMCJ11A (Fairchild Semiconductor) is a direct electrical equivalent with identical voltage and current specifications. The primary difference is packaging format (Bulk vs. Tape & Reel) and a reduced maximum operating temperature of 150°C versus 175°C. Selection is appropriate for applications operating within -55°C to 150°C range where bulk packaging is acceptable.

SMCJ11A-13-F (Diodes Incorporated) maintains electrical equivalence with peak pulse current of 82.4A (within tolerance of 82.5A specification) and identical voltage parameters. This part is RoHS3 compliant and supplied in Tape & Reel format. Operating temperature maximum is 150°C. Selection is suitable for applications requiring tape-and-reel packaging with standard operating temperature requirements.

1.5SMC13A (Taiwan Semiconductor Corporation) provides similar voltage protection with reverse standoff of 11.1V and clamping voltage of 18.2V. Peak pulse current is 86A with 1500W power rating. This part is suitable for applications where slight variations in reverse standoff voltage are acceptable and telecom-grade specifications are beneficial.

SMDJ11A (Alpha & Omega Semiconductor Inc.) and TPSMD11A (Littelfuse Inc.) both provide enhanced performance with doubled peak pulse current (164.8A to 164.9A) and power dissipation (3000W) while maintaining identical voltage specifications. TPSMD11A includes automotive-grade qualification (AEC-Q101) and extended lower temperature rating (-65°C). These parts are selected when circuit protection margins require higher transient suppression capability.

All substitute parts maintain RoHS3 compliance and REACH unaffected status. Selection should be based on specific application requirements for operating temperature range, packaging format, and required transient suppression capacity.

Frequently Asked Questions (FAQ)

Q: Can SMCJ11A-TP be directly replaced with SMCJ11A?

A: Yes, from an electrical standpoint. Both parts have identical voltage specifications (11V reverse standoff, 18.2V clamping) and peak pulse current (82.5A). The primary difference is packaging: SMCJ11A-TP is supplied in Tape & Reel while SMCJ11A is supplied in Bulk format. Operating temperature range differs slightly (-55°C to 175°C vs. -55°C to 150°C). Verify your application's temperature requirements before substitution.

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

A: Peak pulse power rating indicates the maximum transient energy the device can dissipate during a 10/1000µs pulse. Parts rated 3000W (SMDJ11A, TPSMD11A) can suppress twice the transient energy compared to 1500W parts. Selection depends on the expected transient magnitude in your circuit. Higher power ratings provide additional protection margin.

Q: Are SMDJ11A and TPSMD11A interchangeable?

A: Both parts maintain identical voltage specifications (11V reverse standoff, 18.2V clamping) and similar peak pulse current (164.8A vs. 164.9A). The key difference is that TPSMD11A includes automotive-grade qualification (AEC-Q101) and extended lower temperature rating (-65°C vs. -55°C). TPSMD11A is preferred for automotive or extended temperature applications.

Q: Does operating temperature range affect substitution?

A: Yes. SMCJ11A-TP operates to 175°C maximum junction temperature, while most substitutes are rated to 150°C. If your application requires operation above 150°C, SMCJ11A-TP is the only suitable choice. For applications within -55°C to 150°C, all listed substitutes are acceptable.

Q: Can I use a higher current-rated part (SMDJ11A) in place of SMCJ11A-TP?

A: Yes. SMDJ11A maintains identical voltage specifications while providing doubled peak pulse current (164.9A vs. 82.5A) and power dissipation (3000W vs. 1500W). This substitution increases circuit protection margin. No circuit redesign is required; the higher-rated device is a direct mechanical and electrical upgrade.

Q: What does "Tape & Reel" vs. "Bulk" packaging mean?

A: Tape & Reel packaging supplies components on continuous carrier tape suitable for automated pick-and-place assembly equipment. Bulk packaging supplies loose components. Selection depends on your manufacturing process. Automated assembly lines require Tape & Reel; manual assembly or prototyping may use either format.

Q: Are all listed parts RoHS3 compliant?

A: Yes. All substitute parts listed are RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component manufacturing and use.

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