SMBJ17C Equivalent & Substitute Parts

Part Overview

The SMBJ17C is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component features a 17V reverse standoff voltage with a 28.98V maximum clamping voltage and 21.8A peak pulse current capability in a DO-214AA (SMB) package. The SMBJ17C is classified as obsolete, making identification of functionally equivalent active alternatives essential for new designs and ongoing production support.

Substiute Parts

SMBJ17C

Littelfuse Inc.In Stock: 899SMBJ17C Datasheet

Current PartRFQ

SMBJ17CA

MeritekIn Stock: 22188SMBJ17CA Datasheet

DirectRFQ

SMBJ17CA

MeritekIn Stock: 22188SMBJ17CA Datasheet

DirectRFQ

SMBJ17CA-13-F

Diodes IncorporatedIn Stock: 25321SMBJ17CA-13-F Datasheet

MFR RecommendedRFQ

SMBJ17CA-TP

Micro Commercial CoIn Stock: 3722SMBJ17CA-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMBJ17C is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff: 17V (exact match required)
• Voltage - Clamping (Max) @ Ipp: Must not exceed 28.98V to ensure protection threshold compatibility
• Current - Peak Pulse (10/1000µs): Minimum 21.7A to maintain surge handling capability
• Power - Peak Pulse: 600W (standard for SMBJ series)
• Package / Case: DO-214AA, SMB (mechanical and thermal compatibility)
• Mounting Type: Surface Mount (PCB assembly compatibility)
• RoHS Status: ROHS3 Compliant (regulatory requirement)

All identified substitute parts meet these criteria and are classified as active products, providing long-term availability advantages over the obsolete SMBJ17C.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts—SMBJ17CA (Meritek), SMBJ17CA-13-F (Diodes Incorporated), and SMBJ17CA-TP (Micro Commercial Co)—are functionally equivalent to the SMBJ17C and meet the required electrical and mechanical specifications for direct substitution.

SMBJ17CA-13-F (Diodes Incorporated) is designated as the manufacturer-recommended primary substitute, offering the highest inventory availability (25,254 pcs) and active product status with full ROHS3 and REACH compliance documentation.

SMBJ17CA-TP (Micro Commercial Co) provides an extended operating temperature range to -55°C ~ 175°C (TJ), offering enhanced thermal performance for applications requiring operation at elevated temperatures beyond the standard 150°C maximum.

SMBJ17CA (Meritek) represents an alternative source option with substantial inventory (22,100 pcs) and identical electrical performance characteristics.

All substitute parts maintain the DO-214AA (SMB) package footprint, ensuring PCB-level compatibility without layout modifications. Selection among these alternatives should be based on supply chain availability, lead time requirements, and specific thermal performance needs of the application.

Frequently Asked Questions (FAQ)

Q: Can SMBJ17CA-13-F be used as a direct replacement for SMBJ17C without PCB modifications?

A: Yes. Both components use the DO-214AA (SMB) package with identical mechanical dimensions and pin configuration. No PCB layout changes are required.

Q: What is the significance of the lower clamping voltage (27.6V) in substitute parts compared to the SMBJ17C (28.98V)?

A: The lower clamping voltage in substitute parts provides improved overvoltage protection by clamping transient events at a lower threshold. This is within acceptable design margins for 17V standoff applications and does not compromise circuit protection.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. SMBJ17CA (Meritek), SMBJ17CA-13-F (Diodes Incorporated), and SMBJ17CA-TP (Micro Commercial Co) are all ROHS3 compliant with MSL rating of 1 (Unlimited).

Q: Which substitute part offers the best long-term availability?

A: SMBJ17CA-13-F (Diodes Incorporated) is the manufacturer-recommended substitute with the highest current inventory (25,254 pcs) and active product status, ensuring sustained availability for production and design support.

Q: Does the extended temperature range of SMBJ17CA-TP (-55°C ~ 175°C) affect electrical performance?

A: No. The extended temperature range represents enhanced thermal capability. Electrical parameters remain equivalent across all substitute parts within their respective operating temperature ranges.

Q: What packaging options are available for these substitute parts?

A: All substitute parts are supplied in Tape & Reel (TR) packaging, standard for high-volume surface-mount assembly operations.