SMBJ20CE3/TR13

Part Overview

The SMBJ20CE3/TR13 is a transient voltage suppressor (TVS) diode manufactured by Microchip Technology, classified as a Zener-type bidirectional TVS diode in the DO-214AA (SMB) surface mount package. This component is designed for general-purpose transient voltage suppression applications and holds Active product status. The need for substitute parts arises from supply chain considerations, inventory availability, or specific design requirements where alternative manufacturers' offerings meet equivalent electrical and mechanical specifications.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	20V
Voltage - Breakdown (Min)	22.2V
Voltage - Clamping (Max) @ Ipp	35.8V
Current - Peak Pulse (10/1000µs)	16.7A
Power - Peak Pulse	600W
Operating Temperature Range	-65°C ~ 150°C (TJ)
Package / Case	DO-214AA, SMB
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the SMBJ20CE3/TR13 is permissible when the alternative component meets the following critical electrical parameters:

Voltage - Reverse Standoff (Typ): 20V
Voltage - Breakdown (Min): 22.2V
Current - Peak Pulse (10/1000µs): minimum 16.7A
Power - Peak Pulse: 600W
Package / Case: DO-214AA or SMB (surface mount equivalent)
Mounting Type: Surface Mount

The substitute parts listed (SMBJ20CA variants from Fairchild Semiconductor, Diodes Incorporated, Micro Commercial Co, and STMicroelectronics) satisfy these core parameters. While certain specifications such as clamping voltage or peak pulse current may vary within acceptable ranges for the application, the standoff voltage, breakdown voltage, power rating, and physical package remain consistent across all qualified substitutes. Temperature range variations are acceptable when the application's operating conditions fall within the overlapping range of the main part and substitute.

Parameter Comparison

Parameter	SMBJ20CE3/TR13 (Microchip)	SMBJ20CA (Fairchild)	SMBJ20CA-13-F (Diodes Inc)	SMBJ20CA-TP (Micro Commercial Co)	SMBJ20CA-TR (STMicroelectronics)
Voltage - Reverse Standoff (Typ)	20V	20V	20V	20V	20V
Voltage - Breakdown (Min)	22.2V	22.2V	22.2V	22.2V	22.2V
Voltage - Clamping (Max) @ Ipp	35.8V	32.4V	32.4V	32.4V	32.4V
Current - Peak Pulse (10/1000µs)	16.7A	18.6A	18.5A	18.5A	19.4A
Power - Peak Pulse	600W	600W	600W	600W	600W
Operating Temperature Range	-65°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 175°C	-55°C ~ 150°C
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB
Type	Zener	Zener	Zener	Zener	Zener
Bidirectional Channels	1	1	1	1	1
RoHS Status	ROHS3 Compliant	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	Not specified	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

All listed substitute parts (SMBJ20CA from multiple manufacturers) carry Active product status, matching the main part's lifecycle classification. Four of the five substitutes provide explicit ROHS3 compliance and MSL rating documentation. The SMBJ20CA-TP variant from Micro Commercial Co offers an extended maximum operating temperature of 175°C, providing an additional margin for elevated ambient conditions compared to the primary part's 150°C specification.

Selection between substitute options should be based on:

Inventory availability and lead time requirements
RoHS and regulatory compliance documentation completeness
Operating temperature range alignment with application requirements
Supply chain qualification and procurement processes

Frequently Asked Questions (FAQ)

Q: Can SMBJ20CA variants directly replace the SMBJ20CE3/TR13 in my design? A: Direct replacement is permissible when the critical electrical parameters align: 20V reverse standoff voltage, 22.2V minimum breakdown voltage, and 600W peak pulse power rating. All listed SMBJ20CA variants meet these requirements. Surface mount package compatibility (DO-214AA/SMB) is confirmed across all options.

Q: What is the significance of the different clamping voltage values (35.8V vs 32.4V)? A: The clamping voltage represents the maximum voltage across the TVS diode during a transient event at peak pulse current. The main part specifies 35.8V maximum, while substitutes specify 32.4V maximum. Selection depends on circuit-level requirements; lower clamping voltage provides tighter clipping but occurs at different peak pulse currents (16.7A vs 18.5-19.4A).

Q: Does operating temperature range affect substitutability? A: The main part operates from -65°C to 150°C, while most substitutes operate from -55°C to 150°C. If your application requires operation below -55°C ambient, the SMBJ20CE3/TR13 is the only qualified option. The SMBJ20CA-TP extends the upper limit to 175°C, suitable for higher-temperature environments.

Q: Are there packaging or tape & reel differences between these options? A: All parts use the DO-214AA (SMB) surface mount package. Packaging variants (Tape & Reel, Cut Tape, Digi-Reel) are supplier-specific delivery formats and do not affect electrical performance or PCB mounting compatibility.

Q: Which substitute offers the best compliance documentation? A: Four of five substitutes (SMBJ20CA-13-F, SMBJ20CA-TP, SMBJ20CA-TR) provide explicit ROHS3 compliance and MSL Level 1 ratings. The generic SMBJ20CA from Fairchild does not specify these certifications in the provided documentation.

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