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SMBJ13E3/TR13
Part Overview
The SMBJ13E3/TR13 is an active transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection in surface-mount applications. This unidirectional zener diode operates across an industrial temperature range of -65°C to 150°C and is packaged in the DO-214AA (SMB) form factor with tape and reel distribution. The component is RoHS3 compliant and REACH unaffected. Equivalent and substitute parts are necessary when the original manufacturer part is unavailable or when supply constraints require sourcing from alternative manufacturers while maintaining electrical and mechanical compatibility.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 13 | V |
| Voltage - Breakdown (Min) | 14.4 | V |
| Voltage - Clamping (Max) @ Ipp | 23.8 | V |
| Current - Peak Pulse (10/1000µs) | 25.2 | A |
| Power - Peak Pulse | 600 | W |
| Operating Temperature Range | -65 to 150 | °C (TJ) |
| Package / Case | DO-214AA, SMB | — |
| Mounting Type | Surface Mount | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitute parts for the SMBJ13E3/TR13 are qualified based on the following critical parameters:
- Voltage Classification: All substitutes maintain the same reverse standoff voltage (13V) and breakdown voltage minimum (14.4V), ensuring equivalent circuit protection thresholds.
- Package Compatibility: All substitute parts utilize the DO-214AA (SMB) surface-mount package, ensuring mechanical and electrical compatibility on printed circuit boards designed for this form factor.
- Peak Pulse Current Handling: Substitute parts operate within the 25.2A to 29A peak pulse current range, providing equivalent or superior transient energy absorption capability.
- Power Dissipation: All substitutes are rated for 600W peak pulse power, matching the main part specification.
- Compliance Standards: All substitute parts are RoHS3 compliant and REACH unaffected, meeting regulatory requirements equivalent to the main part.
The primary differentiator among substitutes is the voltage clamping specification (ranging from 21.5V to 23.8V) and operating temperature range. Parts with lower clamping voltages (21.5V) offer tighter voltage regulation during transient events, while parts with extended temperature ranges (-55°C to 175°C) provide enhanced thermal performance in extreme environments.
Parameter Comparison
| Parameter | SMBJ13E3/TR13 (Microchip) | SMBJ13A (MDD) | SMBJ13A-13-F (Diodes Inc.) | SMBJ13A-TP (Micro Commercial) | SMBJ13A-TR (STMicroelectronics) |
|---|---|---|---|---|---|
| Manufacturer | Microchip Technology | MDD | Diodes Incorporated | Micro Commercial Co | STMicroelectronics |
| Voltage - Reverse Standoff (Typ) | 13V | 13V | 13V | 13V | 13V |
| Voltage - Breakdown (Min) | 14.4V | 14.4V | 14.4V | 14.4V | 14.4V |
| Voltage - Clamping (Max) @ Ipp | 23.8V | 21.5V | 21.5V | 21.5V | 21.5V |
| Current - Peak Pulse (10/1000µs) | 25.2A | 28A | 27.9A | 27.9A | 29A |
| Power - Peak Pulse | 600W | 600W | 600W | 600W | 600W |
| Operating Temperature Range | -65 to 150°C | -50 to 150°C | -55 to 150°C | -55 to 175°C | -55 to 150°C |
| 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 |
| 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) |
Engineering Selection Recommendations
All substitute parts listed maintain full regulatory compliance through RoHS3 certification and REACH status equivalent to the main part. Device selection should prioritize availability and supply logistics while ensuring the application's thermal and electrical requirements are satisfied.
SMBJ13A (MDD): Available in highest inventory quantity (56,400 pcs). Offers 21.5V clamping voltage with 28A peak pulse current. Operating temperature range of -50°C to 150°C is suitable for standard industrial applications where minimum operating temperature does not exceed -50°C.
SMBJ13A-13-F (Diodes Incorporated): 35,300 pcs in stock. Provides 21.5V clamping voltage with 27.9A peak pulse current. Temperature range of -55°C to 150°C extends lower operating temperature to -55°C, beneficial for applications requiring cold-start operation.
SMBJ13A-TP (Micro Commercial Co): 6,243 pcs in stock. Delivers 21.5V clamping voltage with 27.9A peak pulse current. Extended temperature range of -55°C to 175°C is optimal for high-temperature or thermally demanding environments where operating temperatures may exceed 150°C.
SMBJ13A-TR (STMicroelectronics): 2,308 pcs in stock. Provides 21.5V clamping voltage with 29A peak pulse current (highest among substitutes). Temperature range of -55°C to 150°C balances cold-start and moderate thermal performance.
Frequently Asked Questions (FAQ)
Q: What is the primary difference between the SMBJ13E3/TR13 and its substitutes?
A: The main part is manufactured by Microchip Technology and specifies a 23.8V clamping voltage, while all substitute parts (from MDD, Diodes Incorporated, Micro Commercial Co, and STMicroelectronics) specify a 21.5V clamping voltage. All parts share identical reverse standoff (13V) and breakdown (14.4V) voltages. The lower clamping voltage in substitutes results in tighter voltage regulation during transient suppression.
Q: Are all substitute parts pin-compatible with the SMBJ13E3/TR13?
A: All substitute parts use the DO-214AA (SMB) surface-mount package with identical mechanical dimensions and pin configurations. They are directly interchangeable at the printed circuit board level without requiring layout modifications.
Q: Which substitute offers the best performance for low-temperature applications?
A: The SMBJ13A-TP (Micro Commercial Co) and SMBJ13A-13-F (Diodes Incorporated) both support operating temperatures down to -55°C, compared to the main part's -65°C and MDD's -50°C lower limit. For applications requiring operation below -55°C, the original SMBJ13E3/TR13 is specified.
Q: Can I use the SMBJ13A-TP as a substitute for high-temperature applications?
A: The SMBJ13A-TP extends the upper operating temperature to 175°C, exceeding the main part's 150°C specification. This part is suitable for applications where device junction temperatures may approach or exceed 150°C during worst-case transient events.
Q: How do the peak pulse current ratings affect component selection?
A: All substitute parts (27.9A to 29A) meet or exceed the main part's 25.2A specification. Higher peak pulse current ratings indicate superior transient energy absorption capability, making substitutes functionally equivalent or superior in this parameter. Selection should prioritize application availability rather than this specification, as all parts satisfy the 25.2A minimum requirement.
Q: Are there packaging differences between the main part and substitutes?
A: The main part specifies tape and reel (TR) distribution. Substitute parts utilize identical surface-mount packages (DO-214AA, SMB) but may be distributed in cut tape (CT) or alternative reel configurations. These packaging differences do not affect electrical function; they impact only procurement and automated assembly processes.
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