SMBJ24A-HRA Equivalent & Substitute Parts

Part Overview

The SMBJ24A-HRA is a unidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This surface-mount component operates with a 24V reverse standoff voltage and provides peak pulse current handling of 15.5A with a maximum clamping voltage of 38.9V. The part is actively produced and widely stocked, with 908 units available in inventory. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across the specified parameter range.

Substiute Parts

SMBJ24A-HRA

Littelfuse Inc.In Stock: 939SMBJ24A-HRA Datasheet

Current PartRFQ

SMBJ24A

MDDIn Stock: 41210SMBJ24A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMBJ24A-HRA are qualified based on the following electrical and mechanical parameters:

• Voltage - Reverse Standoff (Typ): 24V
• Voltage - Breakdown (Min): 26.7V
• Voltage - Clamping (Max) @ Ipp: 38.9V
• Current - Peak Pulse (10/1000µs): 15.5A
• Power - Peak Pulse: 600W
• Package / Case: DO-214AA, SMB (surface mount)
• Unidirectional channel configuration: 1
• RoHS3 Compliance and REACH Unaffected status

The SMBJ24A by MDD meets all specified electrical parameters and maintains mechanical compatibility through identical package designation and surface-mount configuration.

Parameter Comparison

Engineering Selection Recommendations

Both the SMBJ24A-HRA and SMBJ24A are active products with full RoHS3 compliance and REACH unaffected status. The electrical specifications are identical across all critical parameters: reverse standoff voltage, breakdown voltage, clamping voltage, peak pulse current, and peak pulse power. Both components utilize the same DO-214AA/SMB surface-mount package, ensuring mechanical compatibility in PCB layouts.

The primary difference is the operating temperature range: the SMBJ24A-HRA supports -65 to 150°C, while the SMBJ24A supports -50 to 150°C. Selection between these parts depends on whether the application requires operation below -50°C. For applications within the -50 to 150°C range, both parts are functionally equivalent.

Frequently Asked Questions (FAQ)

Q: Can SMBJ24A (MDD) directly replace SMBJ24A-HRA (Littelfuse) in existing designs?

A: Yes, for applications operating within the -50 to 150°C temperature range. Both parts share identical electrical specifications and the same DO-214AA/SMB package footprint. If the application requires operation below -50°C, the SMBJ24A-HRA is required.

Q: Are the package dimensions identical between these parts?

A: Yes. Both parts use the DO-214AA/SMB surface-mount package, ensuring identical PCB footprint and reflow soldering compatibility.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both SMBJ24A-HRA and SMBJ24A are RoHS3 compliant and REACH unaffected, meeting equivalent environmental and regulatory standards.

Q: What is the significance of the -HRA suffix in the Littelfuse part number?

A: The -HRA designation indicates the specific product line variant from Littelfuse. The MDD equivalent SMBJ24A maintains identical electrical performance without this suffix designation.

Q: Are there inventory or lead-time considerations between these substitutes?

A: The SMBJ24A (MDD) has significantly higher inventory availability at 41,100 units compared to 908 units for the SMBJ24A-HRA (Littelfuse). This may influence procurement decisions based on delivery requirements.