SMBJ64 Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The SMBJ64 is a unidirectional Zener-type transient voltage suppressor manufactured by Littelfuse Inc. in DO-214AA (SMB) surface mount package. This component is designed for general-purpose transient voltage suppression applications with a 64V reverse standoff voltage rating and 600W peak pulse power handling capability. The SMBJ64 is classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement.

Substiute Parts

SMBJ64

Littelfuse Inc.In Stock: 4357SMBJ64 Datasheet

Current PartRFQ

SMBJ64A

MeritekIn Stock: 23111SMBJ64A Datasheet

DirectRFQ

SMBJ64A

MeritekIn Stock: 23111SMBJ64A Datasheet

DirectRFQ

SMBJ64A

MeritekIn Stock: 23111SMBJ64A Datasheet

DirectRFQ

SMBJ64A-13-F

Diodes IncorporatedIn Stock: 3755SMBJ64A-13-F Datasheet

MFR RecommendedRFQ

SMBJ64A-E3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 45504SMBJ64A-E3/52 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMBJ64 is determined by the following critical parameters that must remain constant across equivalent parts:

• Voltage - Reverse Standoff (Typ): 64V
• Package / Case: DO-214AA (SMB)
• Mounting Type: Surface Mount
• Type: Zener, Unidirectional
• Power - Peak Pulse: 600W
• Series: SMBJ (base product number)

The substitute parts identified maintain these core electrical and mechanical specifications. Variations in voltage clamping (103V vs. 108.15V), peak pulse current (5.8A to 5.83A vs. 5.9A), and operating temperature ranges (-55°C to -65°C minimum) are within acceptable tolerance bands for the SMBJ64 product category and do not preclude functional equivalence in general-purpose transient suppression applications.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts are active products with ROHS3 compliance and MSL Level 1 rating, providing long-term procurement viability compared to the obsolete SMBJ64.

SMBJ64A (Meritek) is a direct functional equivalent with identical reverse standoff voltage and package specifications. This part maintains the broadest operating temperature range minimum of -55°C and is available in high inventory quantities (23,100 pcs).

SMBJ64A-13-F (Diodes Incorporated) is manufacturer-recommended and supplied in Tape & Reel packaging. This variant offers active product status with established supply chain presence (3,657 pcs in stock).

SMBJ64A-E3/52 (Vishay TransZorb®) is manufacturer-recommended with the highest available inventory (45,400 pcs). This part is supplied in Tape & Reel packaging and represents the most readily available substitute option.

All three substitute parts share identical 64V reverse standoff voltage, 600W peak pulse power rating, DO-214AA package, and surface mount configuration. Voltage clamping values (103V) and peak pulse current ratings (5.8A to 5.83A) are within acceptable operational margins for general-purpose transient suppression applications.

Frequently Asked Questions (FAQ)

Q: Can SMBJ64A parts from different manufacturers be used interchangeably?

A: Yes. SMBJ64A variants from Meritek, Diodes Incorporated, and Vishay maintain identical reverse standoff voltage (64V), package type (DO-214AA/SMB), and power rating (600W). All are surface mount components with ROHS3 compliance and MSL Level 1 rating.

Q: What is the significance of the voltage clamping difference between SMBJ64 (108.15V) and substitute parts (103V)?

A: Both values fall within the acceptable clamping voltage range for 64V standoff TVS diodes. The 5.15V difference represents normal manufacturing tolerance variation across the SMBJ product family and does not affect functional equivalence in general-purpose transient suppression circuits.

Q: Are there package or mounting differences between substitute options?

A: All substitute parts use DO-214AA (SMB) surface mount package. SMBJ64A-13-F and SMBJ64A-E3/52 are supplied in Tape & Reel (TR) packaging, while SMBJ64A packaging is not specified. All are compatible with standard SMB footprints.

Q: Does the operating temperature range difference (-65°C vs. -55°C minimum) affect substitution?

A: The SMBJ64 specifies -65°C minimum operating temperature, while all active substitutes specify -55°C minimum. Applications requiring operation below -55°C require verification against specific circuit requirements. For standard industrial and commercial applications operating above -55°C, this difference is not limiting.

Q: Which substitute part offers the best procurement advantage?

A: SMBJ64A-E3/52 (Vishay) provides the highest inventory availability (45,400 pcs) and manufacturer-recommended status. SMBJ64A-13-F (Diodes Incorporated) offers Tape & Reel packaging for automated assembly. SMBJ64A (Meritek) provides cost-effective equivalence with high stock levels (23,100 pcs).