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SMBJ8.5CE3/TR13 Equivalent & Substitute Parts
Part Overview
The SMBJ8.5CE3/TR13 is a transient voltage suppressor (TVS) diode manufactured by Microchip Technology, classified as a Zener-type bidirectional TVS device in the DO-214AA (SMB) surface mount package. This component is designed for general-purpose transient voltage suppression applications, featuring an 8.5V reverse standoff voltage and 15.9V maximum clamping voltage at peak pulse current. The device is Active in product status and RoHS3 compliant with unlimited moisture sensitivity level (MSL 1).
Equivalent and substitute parts are identified based on matching or closely aligned electrical characteristics within the TVS diode category. Substitutes must maintain compatibility across reverse standoff voltage, breakdown voltage, clamping voltage, peak pulse current ratings, and surface mount package specifications to ensure functional equivalence in circuit protection applications.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Manufacturer Part Number | SMBJ8.5CE3/TR13 | — |
| Manufacturer | Microchip Technology | — |
| Category | Transient Voltage Suppressors (TVS) | — |
| Type | Zener | — |
| Bidirectional Channels | 1 | — |
| Voltage - Reverse Standoff (Typ) | 8.5 | V |
| Voltage - Breakdown (Min) | 9.44 | V |
| Voltage - Clamping (Max) @ Ipp | 15.9 | V |
| Current - Peak Pulse (10/1000µs) | 37.7 | A |
| Power - Peak Pulse | 600 | W |
| Operating Temperature Range | -65 to 150 | °C (TJ) |
| Mounting Type | Surface Mount | — |
| Package / Case | DO-214AA, SMB | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | — |
| Product Status | Active | — |
Substitute Part Grouping Explanation
Substitute parts for the SMBJ8.5CE3/TR13 are selected based on electrical parameter alignment within the TVS diode category. The primary substitution criteria are:
Critical Matching Parameters:
- Reverse Standoff Voltage (Typ): 8.5V ± tolerance
- Breakdown Voltage (Min): 9.4V to 9.5V range
- Clamping Voltage (Max) @ Ipp: 14.4V to 19.5V range
- Peak Pulse Current (10/1000µs): 37.7A to 42.1A minimum
- Power - Peak Pulse: 600W
- Package / Case: DO-214AA, SMB surface mount
- Bidirectional Channels: 1
- Type: Zener
Secondary Compatibility Factors:
- Product Status: Active
- RoHS Compliance: ROHS3 Compliant
- Moisture Sensitivity Level: MSL 1
- Mounting Type: Surface Mount
Substitute parts maintain functional equivalence when reverse standoff voltage and breakdown voltage specifications align within the specified ranges, ensuring the device operates in the same circuit protection envelope. Clamping voltage and peak pulse current variations within the identified ranges reflect different manufacturer designs while preserving transient suppression capability. All substitute parts are packaged in DO-214AA (SMB) surface mount format, ensuring mechanical and thermal compatibility with the original design.
Parameter Comparison
| Parameter | SMBJ8.5CE3/TR13 (Microchip) | P6SMB10CA (Eaton) | SM6T10CA (STMicroelectronics) | SM6T10CAY (STMicroelectronics) | SMBJ8.5CA (EVVO Semi) | SMBJ8.5CA-13-F (Diodes Inc) | SMBJ8.5CA-TR (STMicroelectronics) | SMBJP6KE10CA-TP (MCC) |
|---|---|---|---|---|---|---|---|---|
| Voltage - Reverse Standoff (Typ) | 8.5V | 8.55V | 8.55V | 8.55V | 8.5V | 8.5V | 8.5V | 8.55V |
| Voltage - Breakdown (Min) | 9.44V | 9.5V | 9.5V | 9.5V | 9.44V | 9.44V | 9.4V | 9.5V |
| Voltage - Clamping (Max) @ Ipp | 15.9V | 14.5V | 18.6V | 18.6V | 14.4V | 14.4V | 19.5V | 14.5V |
| Current - Peak Pulse (10/1000µs) | 37.7A | 42.1A | 215A (8/20µs) | 215A (8/20µs) | 41.7A | 41.7A | 41.7A | 42.1A |
| Power - Peak Pulse | 600W | 600W | 600W | 600W | 600W | 600W | 600W | 600W |
| Operating Temperature Range | -65 to 150°C | -55 to 150°C | -55 to 150°C | -55 to 150°C | -65 to 150°C | -55 to 150°C | -55 to 150°C | -55 to 175°C |
| Package / Case | DO-214AA, SMB | DO-214AA, SMB | DO-214AA, SMB | DO-214AA, SMB | DO-214AA, SMB | DO-214AA, SMB | DO-214AA, SMB | DO-214AA, SMB |
| Type | Zener | Zener | Zener | Zener | Zener | Zener | Zener | Zener |
| Bidirectional Channels | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| RoHS Status | ROHS3 Compliant | RoHS Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
| Product Status | Active | Active | Active | Active | Active | Active | Active | Active |
Engineering Selection Recommendations
All identified substitute parts maintain Active product status and RoHS3 compliance (or equivalent RoHS compliance), ensuring regulatory alignment with the original SMBJ8.5CE3/TR13 component. The following engineering considerations apply to substitute selection:
Direct Electrical Equivalents: SMBJ8.5CA (EVVO Semi) and SMBJ8.5CA-13-F (Diodes Incorporated) provide the closest electrical match to the original part, with identical reverse standoff voltage (8.5V), breakdown voltage (9.44V), and peak pulse current (41.7A) specifications. Both devices operate across the -55°C to 150°C temperature range and are packaged in DO-214AA (SMB) format. SMBJ8.5CA-13-F offers higher inventory availability (46,098 pcs) compared to EVVO Semi's offering (5,415 pcs).
Clamping Voltage Variants: P6SMB10CA (Eaton) and SMBJP6KE10CA-TP (Micro Commercial Co) feature lower clamping voltage (14.5V) with slightly higher peak pulse current (42.1A), suitable for applications requiring tighter voltage suppression. SMBJ8.5CA-TR (STMicroelectronics) provides higher clamping voltage (19.5V) with identical peak pulse current (41.7A), appropriate for circuits tolerating higher transient voltages.
Extended Temperature Performance: SMBJP6KE10CA-TP (Micro Commercial Co) extends the upper operating temperature to 175°C, compared to the standard 150°C maximum of the original part, offering enhanced thermal performance for high-temperature environments.
Automotive-Grade Option: SM6T10CAY (STMicroelectronics) carries AEC-Q101 automotive qualification and operates across -55°C to 150°C, suitable for automotive and industrial applications requiring formal qualification documentation.
All substitute parts maintain MSL 1 (Unlimited) moisture sensitivity level and 600W peak pulse power rating, ensuring compatibility with standard PCB assembly and storage conditions.
Frequently Asked Questions (FAQ)
Q: What electrical parameters determine if a TVS diode can substitute for the SMBJ8.5CE3/TR13?
A: The primary substitution criteria are reverse standoff voltage (8.5V nominal), breakdown voltage (9.4V to 9.5V minimum), clamping voltage (14.4V to 19.5V maximum at peak pulse current), and peak pulse current rating (37.7A to 42.1A). All substitute parts must maintain 600W peak pulse power rating and operate within the -55°C to 150°C temperature range minimum. Package format must be DO-214AA (SMB) surface mount.
Q: Are all listed substitute parts mechanically compatible with the original SMBJ8.5CE3/TR13?
A: Yes. All substitute parts are packaged in DO-214AA (SMB) surface mount format, ensuring identical mechanical footprint, lead spacing, and thermal characteristics. No PCB layout modifications are required for substitution.
Q: What is the difference between the clamping voltage variants listed?
A: Clamping voltage represents the maximum voltage across the TVS diode during transient suppression at peak pulse current. Lower clamping voltage (14.4V to 14.5V) provides tighter voltage suppression, while higher clamping voltage (18.6V to 19.5V) allows greater transient voltage before clamping. Selection depends on circuit protection requirements and downstream component voltage ratings.
Q: Does the SMBJ8.5CA-TR (STMicroelectronics) with 19.5V clamping voltage provide equivalent protection?
A: SMBJ8.5CA-TR operates within the same reverse standoff voltage (8.5V) and breakdown voltage (9.4V) envelope as the original part. The higher clamping voltage (19.5V versus 15.9V) indicates the device allows greater transient voltage before suppression. This is suitable for applications where circuit components tolerate higher transient voltages. Verify downstream component voltage ratings before substitution.
Q: What is the significance of the SM6T10CA and SM6T10CAY peak pulse current specification of 215A (8/20µs)?
A: The 215A specification reflects measurement under an 8/20 microsecond pulse waveform, which differs from the standard 10/1000 microsecond pulse used for other parts. This indicates higher peak current capability under shorter pulse durations. Both devices maintain 600W peak pulse power rating and are suitable for high-energy transient suppression applications.
Q: Is the SM6T10CAY automotive-qualified option suitable for non-automotive applications?
A: Yes. SM6T10CAY carries AEC-Q101 automotive qualification, which represents a superset of standard reliability requirements. The device is suitable for any application requiring the same electrical specifications and operating temperature range (-55°C to 150°C). Automotive qualification does not restrict use in non-automotive circuits.
Q: What inventory considerations apply when selecting a substitute part?
A: Inventory availability varies significantly across manufacturers. SMBJ8.5CA-13-F (Diodes Incorporated) offers the highest availability at 46,098 pcs, while SM6T10CA (STMicroelectronics) provides 55,200 pcs. SMBJ8.5CA-TR (STMicroelectronics) has lower availability at 2,700 pcs. Verify current inventory status with suppliers before design finalization.
Q: Are all substitute parts RoHS3 compliant?
A: All listed substitute parts are RoHS3 compliant or equivalent RoHS compliant. P6SMB10CA (Eaton) carries standard RoHS compliance. All parts maintain MSL 1 (Unlimited) moisture sensitivity level, ensuring compatibility with standard PCB assembly processes and storage conditions.
Q: Can the SMBJP6KE10CA-TP with extended temperature range (-55°C to 175°C) be used in standard applications?
A: Yes. SMBJP6KE10CA-TP is fully compatible with standard applications operating within the -55°C to 150°C range. The extended upper temperature rating (175°C) provides additional thermal margin and is suitable for high-temperature environments or applications with elevated ambient conditions.
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