SMBJ8.5CA-HR Equivalent & Substitute Parts

Part Overview

The SMBJ8.5CA-HR is a bidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc. in the DO-214AA (SMB) surface mount package. This component is designed for general-purpose transient voltage suppression applications with an 8.5V reverse standoff voltage and 14.4V maximum clamping voltage. The part is active in production status and ROHS3 compliant. Equivalent and substitute parts are identified based on matching electrical characteristics and package compatibility to support procurement flexibility and supply chain continuity.

Substiute Parts

SMBJ8.5CA-HR

Littelfuse Inc.In Stock: 1068SMBJ8.5CA-HR Datasheet

Current PartRFQ

SMBJ8.5CA

EVVO SemiIn Stock: 5517SMBJ8.5CA Datasheet

DirectRFQ

SMBJ8.5CA-13-F

Diodes IncorporatedIn Stock: 46117SMBJ8.5CA-13-F Datasheet

DirectRFQ

SMBJ8.5CA-E3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 60121SMBJ8.5CA-E3/52 Datasheet

DirectRFQ

SMBJ8.5CA-TP

Micro Commercial CoIn Stock: 3938SMBJ8.5CA-TP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMBJ8.5CA-HR are qualified based on the following electrical and mechanical parameters:

• Voltage - Reverse Standoff (Typ): 8.5V
• Voltage - Breakdown (Min): 9.44V
• Voltage - Clamping (Max) @ Ipp: 14.4V
• Current - Peak Pulse (10/1000µs): 41.7A
• Power - Peak Pulse: 600W
• Type: Zener, Bidirectional
• Mounting Type: Surface Mount
• Package / Case: DO-214AA, SMB
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

All identified substitute parts match these core electrical specifications and package requirements. Variations in operating temperature range and packaging format (Tape & Reel vs. Cut Tape) do not affect functional equivalence for general-purpose transient voltage suppression applications.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed are functionally equivalent to the SMBJ8.5CA-HR based on matching electrical specifications and package requirements. Selection among these alternatives should be based on:

• Availability and inventory levels from authorized distributors
• Packaging format requirements (Tape & Reel vs. Cut Tape)
• Operating temperature range requirements for the specific application
• Compliance certifications (all parts are ROHS3 compliant and REACH unaffected)
• Lead time and supply chain considerations

The SMBJ8.5CA-TP variant from Micro Commercial Co offers an extended operating temperature range to 175°C, which may be advantageous for high-temperature applications. The SMBJ8.5CA from EVVO Semi is available in Cut Tape format for lower-volume procurement needs. All parts maintain identical electrical performance for transient voltage suppression in general-purpose applications.

Frequently Asked Questions (FAQ)

Q: Can SMBJ8.5CA-HR be directly replaced with SMBJ8.5CA-13-F?

A: Yes. Both parts share identical electrical specifications (8.5V standoff, 14.4V clamping, 41.7A peak pulse current, 600W peak power) and the same DO-214AA SMB package. The primary difference is the manufacturer (Diodes Incorporated vs. Littelfuse Inc.) and operating temperature range (-55°C to 150°C vs. -65°C to 150°C). For applications within the -55°C to 150°C range, direct substitution is valid.

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Tape & Reel (TR) packaging is supplied on continuous carrier tape wound on reels, suitable for automated assembly processes with high-volume production. Cut Tape (CT) packaging is supplied as individual segments cut from the carrier tape, suitable for lower-volume orders and manual assembly. Both formats contain the same component; the difference is in delivery and handling format only.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (SMBJ8.5CA, SMBJ8.5CA-13-F, SMBJ8.5CA-E3/52, and SMBJ8.5CA-TP) are ROHS3 compliant with MSL rating of 1 (Unlimited), matching the compliance profile of the SMBJ8.5CA-HR.

Q: Does operating temperature range affect substitution eligibility?

A: Operating temperature range does not disqualify a part from substitution if the application operates within the overlapping temperature window. The SMBJ8.5CA-HR operates from -65°C to 150°C, while most substitutes operate from -55°C to 150°C. For applications requiring operation below -55°C, the SMBJ8.5CA-HR or SMBJ8.5CA from EVVO Semi are preferred. For applications requiring operation above 150°C, the SMBJ8.5CA-TP (rated to 175°C) is recommended.

Q: What is the significance of the TransZorb® designation on the SMBJ8.5CA-E3/52?

A: TransZorb® is Vishay's product series designation for transient voltage suppressor diodes. This designation does not affect electrical equivalence or substitution eligibility; it is a manufacturer branding convention. The SMBJ8.5CA-E3/52 maintains identical electrical performance to other SMBJ8.5CA variants.

Q: Can these parts be used interchangeably in existing PCB designs?

A: Yes. All substitute parts use the identical DO-214AA SMB surface mount package with the same pin configuration and footprint. PCB layout and assembly processes require no modification when substituting between listed parts.