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SMBJ15E3/TR13
Part Overview
The SMBJ15E3/TR13 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Microchip Technology, classified as a Zener-type device for general-purpose transient suppression applications. This surface mount component operates in the 15V reverse standoff voltage class and is actively produced in ROHS3-compliant packaging. Equivalent and substitute parts are identified when electrical and mechanical parameters align within the specified tolerance ranges for this product category, enabling design flexibility and supply chain continuity.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 15 | V |
| Voltage - Breakdown (Min) | 16.7 | V |
| Voltage - Clamping (Max) @ Ipp | 26.9 | V |
| Current - Peak Pulse (10/1000µs) | 22.3 | A |
| Power - Peak Pulse | 600 | W |
| Operating Temperature Range | -65°C ~ 150°C | TJ |
| Package / Case | DO-214AA, SMB | — |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | — |
| RoHS Status | ROHS3 Compliant | — |
Substitute Part Grouping Explanation
Substitution of TVS diodes within this product category is determined by alignment of five critical parameters: (1) Voltage - Reverse Standoff (15V nominal), (2) Voltage - Breakdown (16.7V minimum), (3) Voltage - Clamping (maximum acceptable range), (4) Current - Peak Pulse capability, and (5) Package / Case format (DO-214AA/SMB). All identified substitute parts maintain the 15V reverse standoff and 16.7V breakdown voltage specifications, with clamping voltages ranging from 23.6V to 26.9V and peak pulse currents between 20A and 25.1A. All substitutes are housed in DO-214AA or SMB packaging, surface mount configuration, with operating temperature ranges of -55°C to -65°C minimum and 150°C maximum. All parts hold ROHS3 compliance and MSL-1 rating.
Parameter Comparison
| Part Number | Manufacturer | Voltage - Reverse Standoff (V) | Voltage - Clamping (Max) @ Ipp (V) | Current - Peak Pulse (A) | Operating Temperature (°C) | Package / Case | RoHS Status |
|---|---|---|---|---|---|---|---|
| SMBJ15E3/TR13 | Microchip Technology | 15 | 26.9 | 22.3 | -65 ~ 150 | DO-214AA, SMB | ROHS3 |
| SACB15 | Littelfuse Inc. | 15 | 23.6 | 20 | -55 ~ 150 | DO-214AA, SMB | ROHS3 |
| SMBJ15A | EVVO Semi | 15 | 24.4 | 24.6 | -65 ~ 150 | DO-214AC, SMA | ROHS3 |
| SMBJ15A-13-F | Diodes Incorporated | 15 | 24.4 | 24 | -55 ~ 150 | DO-214AA, SMB | ROHS3 |
| SMBJ15A-TR | STMicroelectronics | 15 | 24.4 | 25.1 | -55 ~ 150 | DO-214AA, SMB | ROHS3 |
| SZ1SMB15AT3G | Littelfuse Inc. | 15 | 24.4 | 24 | -65 ~ 150 | DO-214AA, SMB | ROHS3 |
Engineering Selection Recommendations
All identified substitute parts are active products with ROHS3 compliance and MSL-1 moisture sensitivity ratings, confirming suitability for current manufacturing and assembly processes. The SMBJ15E3/TR13 (Microchip Technology) and SMBJ15A-13-F (Diodes Incorporated) both utilize DO-214AA/SMB packaging with maintained DO-214AA mechanical compatibility. The SZ1SMB15AT3G offers automotive-grade qualification (AEC-Q101) for applications requiring automotive component specifications. The SMBJ15A-TR (STMicroelectronics) operates within the SMBJ and TRANSIL™ series designations. Part selection within this group depends on specific supply availability, manufacturing lead times, and whether automotive-qualified components are contractually required.
Frequently Asked Questions (FAQ)
Q: Can SMBJ15A (EVVO Semi, DO-214AC/SMA package) substitute for the SMBJ15E3/TR13 (DO-214AA/SMB)? A: The SMBJ15A maintains electrical parameter compatibility (15V reverse standoff, 16.7V breakdown, 24.4V clamping, 24.6A peak pulse), but uses DO-214AC/SMA mechanical packaging instead of DO-214AA/SMB. PCB land pattern and assembly fixture modifications are required. Substitution is electrically valid but requires mechanical design review.
Q: What is the difference between SACB15 and other substitutes? A: The SACB15 (Littelfuse Inc.) has the lowest peak pulse current specification (20A) and clamping voltage (23.6V) within the substitute group, though both remain within acceptable ranges for 15V standoff class applications. This part is suitable for designs with lower transient current requirements.
Q: Are all substitutes automotive qualified? A: Only the SZ1SMB15AT3G carries AEC-Q101 automotive qualification. Other parts are general-purpose components. Automotive applications must specify automotive-qualified parts or verify end-customer acceptance.
Q: Is packaging compatibility critical when selecting substitutes? A: Yes. The SMBJ15E3/TR13 uses DO-214AA/SMB housing. SMBJ15A uses DO-214AC/SMA, requiring different PCB footprints. Designs using DO-214AA/SMB packaging should select among SACB15, SMBJ15A-13-F, SMBJ15A-TR, or SZ1SMB15AT3G to maintain mechanical compatibility without redesign.
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