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SMAJ75CE3/TR13 Equivalent & Substitute Parts
Part Overview
The SMAJ75CE3/TR13 is a transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection applications. This surface-mount component operates in the 75V reverse standoff voltage class and provides peak pulse power dissipation of 500W. The part is currently in active production status with RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1).
Substitute parts are identified based on matching electrical performance parameters within the SMAJ75 series, including reverse standoff voltage, breakdown voltage, clamping voltage, and peak pulse current ratings. Alternative sources provide equivalent functional performance while maintaining compatibility with DO-214AC (SMA) package specifications.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 75 | V |
| Voltage - Breakdown (Min) | 83.3 | V |
| Voltage - Clamping (Max) @ Ipp | 134 | V |
| Current - Peak Pulse (10/1000µs) | 3.7 | A |
| Power - Peak Pulse | 500 | W |
| Package / Case | DO-214AC, SMA | — |
| Operating Temperature Range | -65 to 150 | °C |
| Type | Zener | — |
| Bidirectional Channels | 1 | — |
| RoHS Status | ROHS3 Compliant | — |
Substitute Part Grouping Explanation
Substitute parts for the SMAJ75CE3/TR13 are qualified based on the following electrical and mechanical criteria:
Matching Parameters (Required for Substitution):
- Reverse standoff voltage: 75V (typical)
- Breakdown voltage minimum: 83.3V
- Package type: DO-214AC (SMA) surface mount
- Bidirectional channels: 1
- Type: Zener diode
- RoHS3 compliance
- MSL rating: 1 (Unlimited)
Allowable Variations:
- Clamping voltage (Max @ Ipp): 121V to 134V range
- Peak pulse current: 3.3A to 3.7A range
- Peak pulse power: 400W to 500W range
- Operating temperature range: -55°C to -65°C minimum; 150°C maximum
- Manufacturer source: Microchip Technology, Meritek, Diodes Incorporated, Vishay General Semiconductor
All substitute parts maintain functional equivalence within the SMAJ75 series classification and are suitable for direct replacement in general-purpose transient voltage suppression applications.
Parameter Comparison
| Parameter | SMAJ75CE3/TR13 (Microchip) | SMAJ75CA (Meritek) | SMAJ75CA-13-F (Diodes Inc.) | SMAJ75CA-E3/61 (Vishay) |
|---|---|---|---|---|
| Manufacturer | Microchip Technology | Meritek | Diodes Incorporated | Vishay General Semiconductor |
| Voltage - Reverse Standoff (Typ) | 75V | 75V | 75V | 75V |
| Voltage - Breakdown (Min) | 83.3V | 83.3V | 83.3V | 83.3V |
| Voltage - Clamping (Max) @ Ipp | 134V | 121V | 121V | 121V |
| Current - Peak Pulse (10/1000µs) | 3.7A | 3.31A | 3.3A | 3.3A |
| Power - Peak Pulse | 500W | 400W | 400W | 400W |
| Package / Case | DO-214AC, SMA | DO-214AC, SMA | DO-214AC, SMA | DO-214AC, SMA |
| Operating Temperature Range | -65 to 150°C | -55 to 150°C | -55 to 150°C | -55 to 150°C |
| Type | Zener | Zener | Zener | Zener |
| Bidirectional Channels | 1 | 1 | 1 | 1 |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
Engineering Selection Recommendations
Primary Selection (SMAJ75CE3/TR13): The Microchip Technology SMAJ75CE3/TR13 is the specified component with the highest peak pulse power rating (500W) and lowest operating temperature minimum (-65°C). This part is recommended for applications requiring maximum thermal headroom and extended low-temperature operation.
Equivalent Substitutes: All three substitute parts (SMAJ75CA from Meritek, SMAJ75CA-13-F from Diodes Incorporated, and SMAJ75CA-E3/61 from Vishay) are functionally equivalent for applications where the operating temperature range does not extend below -55°C and peak pulse power requirements do not exceed 400W. These alternatives maintain identical reverse standoff voltage (75V), breakdown voltage (83.3V), and package specifications.
Compliance Considerations: All parts maintain ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1), ensuring compatibility with standard surface-mount assembly processes and storage conditions. REACH status is unaffected across all variants.
Inventory Availability: Meritek SMAJ75CA offers the highest inventory availability (20,100 pieces), followed by Vishay SMAJ75CA-E3/61 (1,300 pieces) and Diodes Incorporated SMAJ75CA-13-F (1,524 pieces). Microchip SMAJ75CE3/TR13 maintains 778 pieces in stock.
Frequently Asked Questions (FAQ)
Q: Can SMAJ75CA (Meritek) be used as a direct replacement for SMAJ75CE3/TR13 (Microchip)?
A: Yes, SMAJ75CA is functionally equivalent for applications operating within -55°C to 150°C temperature range and requiring peak pulse power up to 400W. Both parts share identical reverse standoff voltage (75V), breakdown voltage (83.3V), and DO-214AC (SMA) package specifications. The primary difference is the clamping voltage (121V vs. 134V) and peak pulse current (3.31A vs. 3.7A), which remain within acceptable substitution parameters for general-purpose transient voltage suppression.
Q: What is the difference between SMAJ75CA-13-F and SMAJ75CA-E3/61?
A: Both parts are functionally equivalent with identical electrical specifications: 75V reverse standoff, 83.3V breakdown voltage, 121V clamping voltage, and 3.3A peak pulse current. The primary differences are manufacturer (Diodes Incorporated vs. Vishay General Semiconductor), packaging format (Tape & Reel vs. Cut Tape & Digi-Reel), and inventory availability. Selection between these parts depends on packaging requirements and supplier availability.
Q: Are all substitute parts compatible with the DO-214AC (SMA) package footprint?
A: Yes. All substitute parts use the DO-214AC (SMA) surface-mount package, ensuring mechanical and electrical compatibility with PCB layouts designed for the SMAJ75CE3/TR13. No footprint modifications are required.
Q: What is the significance of the clamping voltage difference (134V vs. 121V)?
A: The clamping voltage represents the maximum voltage across the TVS diode during peak pulse conditions. The SMAJ75CE3/TR13 clamps at 134V maximum, while substitute parts clamp at 121V maximum. Lower clamping voltage provides superior transient suppression performance. Applications requiring clamping below 121V should use substitute parts; applications requiring clamping up to 134V should use the primary SMAJ75CE3/TR13.
Q: Can these parts be used interchangeably in high-temperature applications?
A: All parts operate to 150°C maximum junction temperature. However, the SMAJ75CE3/TR13 supports operation down to -65°C, while substitutes support operation down to -55°C. For applications requiring extended low-temperature operation below -55°C, the primary part is required.
Q: What compliance certifications apply to all parts in this substitution group?
A: All parts are ROHS3 compliant, REACH unaffected, and carry ECCN classification EAR99. All parts maintain MSL 1 (Unlimited) moisture sensitivity rating, permitting storage without desiccant requirements and compatibility with standard surface-mount assembly processes.
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