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SMBJ85AE3/TR13 Equivalent & Substitute Parts
Part Overview
The SMBJ85AE3/TR13 is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Microchip Technology in the DO-214AA (SMB) surface mount package. This component is designed for general-purpose transient voltage suppression applications, featuring an 85V reverse standoff voltage and 137V maximum clamping voltage. The part is currently in active product status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1).
Equivalent and substitute parts are identified based on matching electrical performance parameters, mechanical compatibility, and regulatory compliance. Alternative sources and variants are necessary to support supply chain flexibility, inventory availability, and design continuity across manufacturing environments.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 85 | V |
| Voltage - Breakdown (Min) | 94.4 | V |
| Voltage - Clamping (Max) @ Ipp | 137 | V |
| Current - Peak Pulse (10/1000µs) | 4.4 | A |
| Power - Peak Pulse | 600 | W |
| Operating Temperature Range | -65 to 150 | °C (TJ) |
| Package / Case | DO-214AA, SMB | — |
| Mounting Type | Surface Mount | — |
| Type | Zener | — |
| Unidirectional Channels | 1 | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitute parts for the SMBJ85AE3/TR13 are qualified based on the following electrical and mechanical parameters:
Critical Matching Parameters:
- Voltage - Reverse Standoff (Typ): 85V
- Voltage - Breakdown (Min): 94.4V
- Voltage - Clamping (Max) @ Ipp: 137V
- Current - Peak Pulse (10/1000µs): 4.4A (or equivalent within tolerance)
- Power - Peak Pulse: 600W
- Package / Case: DO-214AA, SMB
- Mounting Type: Surface Mount
- Type: Zener
- Unidirectional Channels: 1
- RoHS Status: ROHS3 Compliant
- Moisture Sensitivity Level (MSL): 1 (Unlimited)
All identified substitute parts maintain identical voltage specifications, peak pulse power ratings, and package form factors. Variations in operating temperature range and peak pulse current (within 4.38A to 4.4A) do not affect functional substitution for general-purpose transient voltage suppression applications. All substitute parts retain active product status and full regulatory compliance.
Parameter Comparison
| Parameter | SMBJ85AE3/TR13 (Microchip) | SMBJ85A (Meritek) | SMBJ85A-13-F (Diodes Inc.) | SMBJ85A-E3/52 (Vishay) | SMBJ85A-HR (Littelfuse) |
|---|---|---|---|---|---|
| Voltage - Reverse Standoff (Typ) | 85V | 85V | 85V | 85V | 85V |
| Voltage - Breakdown (Min) | 94.4V | 94.4V | 94.4V | 94.4V | 94.4V |
| Voltage - Clamping (Max) @ Ipp | 137V | 137V | 137V | 137V | 137V |
| Current - Peak Pulse (10/1000µs) | 4.4A | 4.38A | 4.4A | 4.4A | 4.4A |
| Power - Peak Pulse | 600W | 600W | 600W | 600W | 600W |
| Operating Temperature Range | -65 to 150°C (TJ) | -55 to 150°C | -55 to 150°C (TJ) | -55 to 150°C (TJ) | -65 to 150°C (TJ) |
| Package / Case | DO-214AA, SMB | DO-214AA (SMB) | DO-214AA, SMB | DO-214AA, SMB | DO-214AA, SMB |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Type | Zener | Zener | Zener | Zener | Zener |
| Unidirectional Channels | 1 | 1 | 1 | 1 | 1 |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
| Product Status | Active | Active | Active | Active | Active |
Engineering Selection Recommendations
All identified substitute parts maintain functional equivalence to the SMBJ85AE3/TR13 based on electrical performance specifications and mechanical compatibility. Selection among these alternatives is determined by the following factors:
Regulatory Compliance: All substitute parts are ROHS3 compliant and REACH unaffected, meeting current environmental and hazardous substance restrictions. MSL 1 rating across all variants ensures unlimited shelf life without moisture sensitivity constraints.
Product Status: All substitute parts maintain active product status, ensuring continued availability and manufacturer support.
Operating Temperature Range: The SMBJ85AE3/TR13 (Microchip) and SMBJ85A-HR (Littelfuse) support the extended lower temperature limit of -65°C, compared to -55°C for Meritek, Diodes Incorporated, and Vishay variants. Selection of the extended temperature range variants is required only when circuit operation below -55°C is specified.
Peak Pulse Current: The SMBJ85A (Meritek) specifies 4.38A peak pulse current, compared to 4.4A for all other variants. This 0.02A difference does not affect functional substitution for general-purpose transient voltage suppression.
Inventory Availability: Vishay SMBJ85A-E3/52 maintains the highest inventory level (45,200 pcs), followed by Meritek SMBJ85A (2,060 pcs), Diodes Incorporated SMBJ85A-13-F (4,344 pcs), and Littelfuse SMBJ85A-HR (3,435 pcs).
Frequently Asked Questions (FAQ)
Q: Can SMBJ85A (Meritek) be used as a direct replacement for SMBJ85AE3/TR13?
A: Yes. The Meritek SMBJ85A maintains identical voltage specifications (85V standoff, 94.4V breakdown, 137V clamping), equivalent peak pulse power (600W), and matching DO-214AA SMB package. The 4.38A peak pulse current specification is within acceptable tolerance for general-purpose transient suppression. Operating temperature range is -55 to 150°C, compared to -65 to 150°C for the original part.
Q: What is the difference between SMBJ85A-13-F and SMBJ85A-E3/52?
A: Both parts are functionally equivalent with identical electrical specifications (85V standoff, 137V clamping, 4.4A peak pulse, 600W power). SMBJ85A-13-F is manufactured by Diodes Incorporated, while SMBJ85A-E3/52 is manufactured by Vishay (TransZorb® series). Both are packaged in DO-214AA SMB and support -55 to 150°C operating temperature. Selection between these variants is based on supplier preference and inventory availability.
Q: Is the SMBJ85A-HR suitable for applications requiring extended low-temperature operation?
A: Yes. The Littelfuse SMBJ85A-HR supports the extended operating temperature range of -65 to 150°C (TJ), matching the original SMBJ85AE3/TR13 specification. This variant is appropriate for circuits requiring operation below -55°C. All other electrical and mechanical parameters are identical to other substitute parts.
Q: Are all substitute parts available in Tape & Reel packaging?
A: The SMBJ85AE3/TR13 (Microchip), SMBJ85A-13-F (Diodes Incorporated), SMBJ85A-E3/52 (Vishay), and SMBJ85A-HR (Littelfuse) are all specified with Tape & Reel (TR) packaging. The Meritek SMBJ85A packaging specification is not provided in available documentation.
Q: Do all substitute parts meet RoHS3 compliance?
A: Yes. All identified substitute parts are ROHS3 compliant and REACH unaffected. Moisture sensitivity level is MSL 1 (Unlimited) across all variants, eliminating moisture-related handling constraints.
Q: What is the basis for substitution compatibility?
A: Substitution compatibility is established through matching of critical electrical parameters: 85V reverse standoff voltage, 94.4V minimum breakdown voltage, 137V maximum clamping voltage, 600W peak pulse power, and 4.4A (or 4.38A) peak pulse current. All parts are unidirectional Zener diodes in DO-214AA SMB surface mount packages with identical functional application in general-purpose transient voltage suppression circuits.
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