SMBJ20A-13 Equivalent & Substitute Parts

Part Overview

The SMBJ20A-13 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Diodes Incorporated in the SMB (DO-214AA) package. This component is designed for general-purpose transient voltage protection with a 20V reverse standoff voltage and 32.4V maximum clamping voltage. The part is currently discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing design support and procurement.

Substiute Parts

SMBJ20A-13

Diodes IncorporatedIn Stock: 877SMBJ20A-13 Datasheet

Current PartRFQ

SMBJ20A-13-F

Diodes IncorporatedIn Stock: 35279SMBJ20A-13-F Datasheet

DirectRFQ

SMBJ20A-TP

Micro Commercial CoIn Stock: 3850SMBJ20A-TP Datasheet

DirectRFQ

P6SMB20A

Eaton - Electronics DivisionIn Stock: 5158P6SMB20A Datasheet

MFR RecommendedRFQ

PTVS20VP1UP,115

NXP USA Inc.In Stock: 20046PTVS20VP1UP,115 Datasheet

MFR RecommendedRFQ

SMBJ20A

Good-Ark SemiconductorIn Stock: 38643SMBJ20A Datasheet

MFR RecommendedRFQ

SMBJ20A

Good-Ark SemiconductorIn Stock: 38643SMBJ20A Datasheet

MFR RecommendedRFQ

SMBJ20A

Good-Ark SemiconductorIn Stock: 38643SMBJ20A Datasheet

MFR RecommendedRFQ

SMBJ20A-TR

STMicroelectronicsIn Stock: 2880SMBJ20A-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMBJ20A-13 is determined by the following critical electrical and mechanical parameters:

• Voltage - Reverse Standoff (Typ): 20V
• Voltage - Breakdown (Min): 22.2V
• Voltage - Clamping (Max) @ Ipp: 32.4V
• Current - Peak Pulse (10/1000µs): 18.5A
• Power - Peak Pulse: 600W
• Package / Case: DO-214AA, SMB
• Unidirectional Channels: 1
• Type: Zener

Substitute parts are grouped into two categories:

Direct Electrical Equivalents (Identical Parameters): Parts that match all critical electrical specifications and package requirements. These include SMBJ20A-13-F (Diodes Incorporated), SMBJ20A-TP (Micro Commercial Co), SMBJ20A (Good-Ark Semiconductor), and SMBJ20A-TR (STMicroelectronics).

Functional Equivalents (Different Package): Parts that match electrical specifications but use alternative packages. PTVS20VP1UP,115 (NXP USA Inc.) provides identical electrical performance in SOD-128 package with automotive qualification.

Partial Electrical Match: P6SMB20A (Eaton - Electronics Division) operates at lower voltage ratings (17.1V standoff, 27.7V clamping) with higher peak pulse current (21.7A) and is suitable only for applications with lower voltage requirements.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical and Package Specifications):

SMBJ20A-13-F (Diodes Incorporated) is the primary direct substitute. It maintains identical electrical parameters and SMB package, with active product status and ROHS3 compliance. This part offers the highest compatibility with existing designs.

SMBJ20A-TP (Micro Commercial Co) and SMBJ20A (Good-Ark Semiconductor) provide equivalent electrical performance in SMB package with active status and ROHS3 compliance. SMBJ20A-TP offers extended operating temperature range to 175°C.

SMBJ20A-TR (STMicroelectronics) delivers equivalent performance with marginally higher peak pulse current (19.4A vs 18.5A) and active status with ROHS3 compliance.

For Alternative Package Applications:

PTVS20VP1UP,115 (NXP USA Inc.) matches all electrical specifications but uses SOD-128 package. This part includes automotive qualification (AEC-Q101) and is suitable for applications requiring smaller form factor or automotive-grade components.

For Lower Voltage Applications Only:

P6SMB20A (Eaton - Electronics Division) operates at reduced voltage ratings (17.1V standoff, 27.7V clamping) and is not suitable as a direct substitute for the SMBJ20A-13. Use only in applications with maximum voltage requirements below 17.1V.

Frequently Asked Questions (FAQ)

Q: Can SMBJ20A-13-F be used as a direct replacement for SMBJ20A-13?

A: Yes. SMBJ20A-13-F is manufactured by the same company (Diodes Incorporated) and maintains identical electrical specifications: 20V reverse standoff, 22.2V breakdown minimum, 32.4V clamping maximum, 18.5A peak pulse current, and 600W peak power. Both use DO-214AA (SMB) package. The primary difference is product status: SMBJ20A-13-F is active while SMBJ20A-13 is discontinued.

Q: What is the difference between SMBJ20A-13-F and SMBJ20A-TP?

A: Both parts are electrically identical with 20V standoff and 32.4V clamping specifications. The differences are manufacturer (Diodes Incorporated vs Micro Commercial Co) and operating temperature range (150°C vs 175°C maximum). SMBJ20A-TP offers extended temperature capability.

Q: Can P6SMB20A replace SMBJ20A-13?

A: No. P6SMB20A operates at lower voltage ratings (17.1V standoff vs 20V, 27.7V clamping vs 32.4V). It is suitable only for applications with maximum voltage requirements below 17.1V. Using it in a 20V circuit would result in inadequate protection.

Q: Is PTVS20VP1UP,115 compatible with existing PCB layouts designed for SMBJ20A-13?

A: No. PTVS20VP1UP,115 uses SOD-128 package while SMBJ20A-13 uses DO-214AA (SMB) package. PCB footprints are not compatible. However, electrical specifications are identical, making this part suitable for new designs or redesigned layouts requiring smaller form factor or automotive qualification.

Q: What does ROHS3 compliance mean for these parts?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, and other hazardous materials. SMBJ20A-13 is RoHS non-compliant, while most active substitutes (SMBJ20A-13-F, SMBJ20A-TP, SMBJ20A, SMBJ20A-TR) are ROHS3 compliant, making them suitable for applications with environmental or regulatory requirements.

Q: Which substitute offers the best availability?

A: SMBJ20A (Good-Ark Semiconductor) has the highest inventory at 38,610 pieces. SMBJ20A-13-F (Diodes Incorporated) has 35,200 pieces. Both are suitable for high-volume procurement.