SMBJ120CA-TP Equivalent & Substitute Parts

Part Overview

The SMBJ120CA-TP is a Transient Voltage Suppressor (TVS) diode manufactured by Micro Commercial Co, designed for general-purpose transient voltage protection in surface-mount applications. This unidirectional Zener diode operates with a reverse standoff voltage of 120V and provides clamping protection at 193V maximum. The component is packaged in DO-214AA (SMB) format and is currently in active production status with full RoHS3 compliance.

Equivalent and substitute parts are identified when components share identical electrical specifications and mechanical compatibility within the allowed parameter tolerances for TVS diode applications. Substitutes enable procurement flexibility, inventory optimization, and supply chain continuity.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	120	V
Voltage - Breakdown (Min)	133	V
Voltage - Clamping (Max) @ Ipp	193	V
Current - Peak Pulse (10/1000µs)	3.1	A
Power - Peak Pulse	600	W
Operating Temperature Range	-55 to 175	°C
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the SMBJ120CA-TP are qualified based on the following electrical and mechanical parameters:

Voltage - Reverse Standoff (Typ): 120V
Voltage - Breakdown (Min): 133V
Voltage - Clamping (Max) @ Ipp: 193V
Current - Peak Pulse (10/1000µs): 3.1A nominal (tolerance range 3.1A to 3.11A acceptable)
Power - Peak Pulse: 600W
Package / Case: DO-214AA (SMB)
Mounting Type: Surface Mount
Type: Zener, Bidirectional Channels: 1
RoHS Status: ROHS3 Compliant

Two substitute parts meet these criteria: SMBJ120CA (Meritek) and SMBJ120CA-13-F (Diodes Incorporated). Both maintain identical voltage specifications and mechanical compatibility. Peak pulse current specifications vary within acceptable tolerance (3.1A to 3.11A), and operating temperature ranges differ slightly but remain within functional requirements for general-purpose applications.

Parameter Comparison

Parameter	SMBJ120CA-TP (Micro Commercial Co)	SMBJ120CA (Meritek)	SMBJ120CA-13-F (Diodes Incorporated)
Voltage - Reverse Standoff (Typ)	120V	120V	120V
Voltage - Breakdown (Min)	133V	133V	133V
Voltage - Clamping (Max) @ Ipp	193V	193V	193V
Current - Peak Pulse (10/1000µs)	3.1A	3.11A	3.1A
Power - Peak Pulse	600W	600W	600W
Operating Temperature Range	-55°C to 175°C	-55°C to 150°C	-55°C to 150°C
Package / Case	DO-214AA, SMB	DO-214AA (SMB)	DO-214AA, SMB
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Type	Zener	Zener	Zener
Bidirectional Channels	1	1	1
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active

Engineering Selection Recommendations

All three parts—SMBJ120CA-TP, SMBJ120CA (Meritek), and SMBJ120CA-13-F (Diodes Incorporated)—are active production components with full RoHS3 compliance and REACH unaffected status. Selection among these parts may be based on:

Packaging requirements: SMBJ120CA-TP and SMBJ120CA-13-F are supplied in Tape & Reel format; SMBJ120CA packaging is not specified.
Operating temperature ceiling: SMBJ120CA-TP supports -55°C to 175°C; both substitute parts support -55°C to 150°C. Applications requiring operation above 150°C require the original SMBJ120CA-TP.
Current specification tolerance: SMBJ120CA (Meritek) specifies 3.11A peak pulse current, marginally higher than the 3.1A nominal specification of the other two parts.
Inventory availability: Meritek SMBJ120CA shows 34,400 units in stock; Diodes Incorporated SMBJ120CA-13-F shows 3,900 units; Micro Commercial Co SMBJ120CA-TP shows 2,364 units.

Frequently Asked Questions (FAQ)

Q: Can SMBJ120CA (Meritek) be used as a direct replacement for SMBJ120CA-TP?

A: Yes. Both parts share identical voltage specifications (120V standoff, 133V breakdown, 193V clamping), current ratings within acceptable tolerance (3.1A vs. 3.11A), and mechanical compatibility (DO-214AA SMB package, surface mount). The operating temperature range differs (150°C vs. 175°C maximum junction temperature); applications operating above 150°C require the original part.

Q: What is the difference between SMBJ120CA-13-F and SMBJ120CA-TP?

A: Both parts are electrically identical across all critical parameters: 120V reverse standoff, 133V breakdown, 193V clamping, and 3.1A peak pulse current. Both are packaged in DO-214AA (SMB) format for surface mount. The primary difference is operating temperature range: SMBJ120CA-13-F supports -55°C to 150°C, while SMBJ120CA-TP supports -55°C to 175°C. SMBJ120CA-13-F is manufactured by Diodes Incorporated; SMBJ120CA-TP is manufactured by Micro Commercial Co.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. SMBJ120CA-TP, SMBJ120CA (Meritek), and SMBJ120CA-13-F (Diodes Incorporated) are all RoHS3 compliant with Moisture Sensitivity Level 1 (unlimited shelf life).

Q: Does packaging format affect substitution?

A: Packaging format does not affect electrical or mechanical compatibility. SMBJ120CA-TP and SMBJ120CA-13-F are supplied in Tape & Reel (TR) format. SMBJ120CA (Meritek) packaging is not specified in available data. All three parts use the same DO-214AA (SMB) component package for surface-mount assembly.

Q: Which substitute part offers the best inventory availability?

A: SMBJ120CA (Meritek) offers the highest inventory availability at 34,400 units in stock, compared to 3,900 units for SMBJ120CA-13-F and 2,364 units for the original SMBJ120CA-TP.

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