SMAJ85A-13 Equivalent & Substitute Parts

Part Overview

The SMAJ85A-13 is an active-status Transient Voltage Suppressor (TVS) diode manufactured by Diodes Incorporated. This unidirectional zener-type device is designed for surface-mount applications in the DO-214AC (SMA) package. The component provides transient voltage suppression with an 85V reverse standoff voltage and 137V maximum clamping voltage at peak pulse current. The SMAJ85A-13 is supplied in Cut Tape (CT) packaging and is ROHS3 compliant with automotive-grade qualification. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity for applications requiring identical or functionally compatible TVS diode performance.

Substiute Parts

SMAJ85A-13

Diodes IncorporatedIn Stock: 2650SMAJ85A-13 Datasheet

Current PartRFQ

SMAJ85A-13-F

Diodes IncorporatedIn Stock: 12439SMAJ85A-13-F Datasheet

DirectRFQ

SMA6J85A-TR

STMicroelectronicsIn Stock: 30157SMA6J85A-TR Datasheet

SimilarRFQ

SMAJ85A

MDDIn Stock: 36947SMAJ85A Datasheet

SimilarRFQ

SMAJ85A

MDDIn Stock: 36947SMAJ85A Datasheet

SimilarRFQ

SMAJ85A-TP

Micro Commercial CoIn Stock: 5742SMAJ85A-TP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMAJ85A-13 are classified based on electrical and mechanical parameter compatibility. The primary substitution criteria are:

Critical Parameters for Substitution:

• Voltage - Reverse Standoff (Typ): 85V
• Voltage - Clamping (Max) @ Ipp: 137V (or higher)
• Current - Peak Pulse (10/1000µs): 2.9A (or higher)
• Package / Case: DO-214AC, SMA
• Mounting Type: Surface Mount
• Type: Zener, Unidirectional (1 channel)

Substitution Categories:

Direct Equivalents maintain identical electrical specifications and differ only in packaging format (Cut Tape vs. Tape & Reel) or manufacturer source:

• SMAJ85A-13-F (Diodes Incorporated, Tape & Reel)
• SMAJ85A (MDD, Tape & Reel)
• SMAJ85A-TP (Micro Commercial Co, Tape & Reel)

Similar/Compatible Substitute exhibits higher performance capability in peak pulse current and clamping voltage while maintaining the same reverse standoff voltage and package format:

• SMA6J85A-TR (STMicroelectronics, Tape & Reel)

All substitute parts are active-status products with ROHS3 compliance and MSL 1 rating, ensuring regulatory and environmental compatibility with the primary part.

Parameter Comparison

Engineering Selection Recommendations

SMAJ85A-13-F (Diodes Incorporated) is the primary direct equivalent. This part maintains identical electrical specifications and is supplied by the same manufacturer as the primary part. The only difference is packaging format (Tape & Reel vs. Cut Tape). Selection is appropriate for high-volume production environments where reel-based component handling is standard. ROHS3 compliance and MSL 1 rating are maintained.

SMAJ85A (MDD) provides direct electrical equivalence with identical voltage and current ratings. This part is suitable for applications where manufacturer source diversification is required. Operating temperature range is -50 to 150°C, which is narrower at the lower bound compared to the primary part (-55°C minimum). ROHS3 compliance and MSL 1 rating are maintained.

SMAJ85A-TP (Micro Commercial Co) offers direct electrical equivalence with extended operating temperature range (-55 to 175°C), providing enhanced thermal performance capability. This part is suitable for applications requiring broader temperature operation. ROHS3 compliance and MSL 1 rating are maintained.

SMA6J85A-TR (STMicroelectronics) is a higher-performance substitute with enhanced peak pulse current (22.5A vs. 2.9A) and peak pulse power (600W vs. 400W). The clamping voltage is slightly higher at 146V. This part is suitable for applications requiring greater transient energy absorption capability while maintaining the same reverse standoff voltage and package format. Operating temperature range extends to 175°C. ROHS3 compliance and MSL 1 rating are maintained.

All substitute parts are active-status products with confirmed inventory availability and full regulatory compliance. Selection should be based on packaging requirements, temperature operating range, and transient energy handling capacity specific to the application.

Frequently Asked Questions (FAQ)

Q: Can SMAJ85A-13-F be used as a direct replacement for SMAJ85A-13?

A: Yes. SMAJ85A-13-F is a direct electrical equivalent manufactured by Diodes Incorporated with identical voltage and current specifications. The difference is packaging format: SMAJ85A-13 is supplied in Cut Tape, while SMAJ85A-13-F is supplied in Tape & Reel. Both are ROHS3 compliant with MSL 1 rating.

Q: What is the difference between SMAJ85A-13 and SMA6J85A-TR?

A: Both parts share the same 85V reverse standoff voltage and DO-214AC (SMA) package. SMA6J85A-TR (STMicroelectronics) provides higher performance with peak pulse current of 22.5A compared to 2.9A, peak pulse power of 600W compared to 400W, and clamping voltage of 146V compared to 137V. SMA6J85A-TR is suitable for applications requiring greater transient suppression capability.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level, matching the primary part's regulatory status.

Q: Does operating temperature range affect substitution compatibility?

A: Operating temperature range does not prevent substitution but should be evaluated against application requirements. SMAJ85A (MDD) operates from -50 to 150°C, while SMAJ85A-TP and SMA6J85A-TR extend to 175°C. The primary part operates from -55 to 150°C. Selection should confirm the substitute's temperature range meets or exceeds application specifications.

Q: Can SMAJ85A-TP replace SMAJ85A-13 in automotive applications?

A: SMAJ85A-TP is electrically equivalent with identical voltage and current specifications and extended temperature range. However, the primary part carries automotive-grade qualification. SMAJ85A-TP should be evaluated against specific automotive qualification requirements of the application before substitution.

Q: What packaging formats are available for SMAJ85A-13 equivalents?

A: The primary part (SMAJ85A-13) is supplied in Cut Tape (CT). Direct equivalents SMAJ85A-13-F, SMAJ85A, SMAJ85A-TP, and SMA6J85A-TR are all supplied in Tape & Reel (TR) format, which is standard for automated assembly processes.

Q: Is the SMA6J85A-TR a drop-in replacement for SMAJ85A-13?

A: SMA6J85A-TR is mechanically compatible (same DO-214AC/SMA package and Surface Mount type) and electrically compatible (same 85V reverse standoff voltage). However, it provides enhanced performance with higher peak pulse current and power ratings. It is suitable as a replacement where higher transient energy absorption is beneficial or required.

Q: What inventory levels are available for substitute parts?

A: SMAJ85A-13-F has 12,332 pcs in stock, SMAJ85A (MDD) has 36,900 pcs, SMAJ85A-TP has 5,713 pcs, and SMA6J85A-TR has 30,100 pcs. The primary part SMAJ85A-13 has 2,559 pcs in stock.