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SMAJ7.5CE3/TR13 Equivalent & Substitute Parts
Part Overview
The SMAJ7.5CE3/TR13 is a transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection in surface-mount applications. This bidirectional Zener diode operates with a reverse standoff voltage of 7.5V and provides clamping protection at 14.3V maximum. The component is supplied in tape and reel packaging with DO-214AC (SMA) form factor and maintains active product status with full RoHS3 compliance.
Substitute parts are necessary when the primary part experiences supply constraints, extended lead times, or when design flexibility permits selection from multiple qualified manufacturers offering equivalent electrical and mechanical characteristics within the same package family.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 7.5 | V |
| Voltage - Breakdown (Min) | 8.33 | V |
| Voltage - Clamping (Max) @ Ipp | 14.3 | V |
| Current - Peak Pulse (10/1000µs) | 35 | A |
| Power - Peak Pulse | 500 | W |
| Operating Temperature Range | -65 to 150 | °C (TJ) |
| Package / Case | DO-214AC, SMA | — |
| Mounting Type | Surface Mount | — |
| Type | Zener | — |
| Bidirectional Channels | 1 | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitution of the SMAJ7.5CE3/TR13 is determined by strict equivalence across the following critical parameters:
Electrical Equivalence Criteria:
- Voltage - Reverse Standoff (Typ): 7.5V (exact match required)
- Voltage - Breakdown (Min): 8.33V (exact match required)
- Bidirectional Channels: 1 (exact match required)
- Type: Zener (exact match required)
Mechanical & Package Equivalence Criteria:
- Package / Case: DO-214AC, SMA (exact match required)
- Mounting Type: Surface Mount (exact match required)
Compliance & Environmental Criteria:
- RoHS Status: ROHS3 Compliant (required)
- Moisture Sensitivity Level (MSL): 1 (Unlimited) (required)
- Product Status: Active (required)
All substitute parts listed below meet these criteria. Variations in clamping voltage (12.9V vs. 14.3V), peak pulse current (31A vs. 35A), peak pulse power (400W vs. 500W), and operating temperature ranges represent acceptable deviations within the same functional class and do not preclude substitution when supply or design requirements necessitate alternative sourcing.
Parameter Comparison
| Parameter | SMAJ7.5CE3/TR13 (Microchip) | SMAJ7.5CA (MDD) | SMAJ7.5CA-13-F (Diodes Inc.) | SMAJ7.5CA-E3/61 (Vishay) | SMAJ7.5CA-TP (Micro Commercial) |
|---|---|---|---|---|---|
| Manufacturer | Microchip Technology | MDD | Diodes Incorporated | Vishay General Semiconductor | Micro Commercial Co |
| Voltage - Reverse Standoff (Typ) | 7.5V | 7.5V | 7.5V | 7.5V | 7.5V |
| Voltage - Breakdown (Min) | 8.33V | 8.33V | 8.33V | 8.33V | 8.33V |
| Voltage - Clamping (Max) @ Ipp | 14.3V | 12.9V | 12.9V | 12.9V | 12.9V |
| Current - Peak Pulse (10/1000µs) | 35A | 31A | 31A | 31A | 31A |
| Power - Peak Pulse | 500W | 400W | 400W | 400W | 400W |
| Operating Temperature Range | -65 to 150°C (TJ) | -50 to 150°C (TJ) | -55 to 150°C (TJ) | -55 to 150°C (TJ) | -55 to 175°C (TA) |
| Package / Case | DO-214AC, SMA | DO-214AC, SMA | DO-214AC, SMA | DO-214AC, SMA | DO-214AC, SMA |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Type | Zener | Zener | Zener | Zener | Zener |
| Bidirectional 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 |
| Inventory Availability | 876 Pcs | 65200 Pcs | 5300 Pcs | 36400 Pcs | 1660 Pcs |
Engineering Selection Recommendations
All listed substitute parts maintain full electrical and mechanical compatibility with the SMAJ7.5CE3/TR13 across the critical parameters that define functional equivalence: reverse standoff voltage, breakdown voltage, package form factor, and mounting type. Each substitute part carries active product status and ROHS3 compliance certification.
Selection Considerations Based on Provided Data:
The SMAJ7.5CA (MDD) offers the highest inventory availability at 65,200 pieces, providing supply security for high-volume applications. The SMAJ7.5CA-E3/61 (Vishay) provides 36,400 pieces with TransZorb® series designation and maintains equivalent electrical performance. The SMAJ7.5CA-13-F (Diodes Incorporated) supplies 5,300 pieces in tape and reel packaging. The SMAJ7.5CA-TP (Micro Commercial Co) offers the widest operating temperature range extending to 175°C and provides 1,660 pieces in inventory.
All substitute parts are qualified for general-purpose transient voltage suppression applications and maintain identical RoHS3 and REACH compliance status as the primary part. Selection among these alternatives depends on supply availability, packaging format requirements, and application-specific temperature operating ranges.
Frequently Asked Questions (FAQ)
Q: Can SMAJ7.5CA (MDD) directly replace SMAJ7.5CE3/TR13 (Microchip) in existing designs?
A: Yes. Both parts share identical reverse standoff voltage (7.5V), breakdown voltage (8.33V), package form factor (DO-214AC, SMA), and mounting type (surface mount). The SMAJ7.5CA operates with 12.9V clamping voltage and 31A peak pulse current compared to the primary part's 14.3V and 35A specifications. These differences represent acceptable performance variations within the same functional class for general-purpose transient voltage suppression.
Q: What is the difference between SMAJ7.5CA-13-F and SMAJ7.5CA-TP?
A: Both parts maintain identical electrical specifications (7.5V standoff, 8.33V breakdown, 12.9V clamping, 31A peak pulse). The SMAJ7.5CA-13-F (Diodes Incorporated) operates across -55°C to 150°C junction temperature range. The SMAJ7.5CA-TP (Micro Commercial Co) extends the upper temperature limit to 175°C ambient temperature. Selection depends on application thermal requirements.
Q: Are all substitute parts available in tape and reel packaging?
A: The SMAJ7.5CE3/TR13 (primary part) and SMAJ7.5CA-13-F are explicitly specified in tape and reel (TR) packaging. The SMAJ7.5CA-E3/61 is supplied in cut tape (CT) and Digi-Reel® format. The SMAJ7.5CA-TP is supplied in tape and reel (TR) packaging. The SMAJ7.5CA (MDD) packaging format is not specified in the provided data. Confirm packaging requirements with supplier documentation before procurement.
Q: Do all substitute parts meet RoHS3 compliance?
A: Yes. All listed substitute parts carry ROHS3 Compliant certification and maintain MSL 1 (Unlimited) moisture sensitivity level, matching the primary part's environmental compliance status.
Q: Which substitute part offers the best inventory availability?
A: The SMAJ7.5CA (MDD) provides the highest inventory level at 65,200 pieces, followed by SMAJ7.5CA-E3/61 (Vishay) at 36,400 pieces. These options provide superior supply security for high-volume production requirements.
Q: Can SMAJ7.5CA-TP be used in applications requiring extended temperature operation?
A: Yes. The SMAJ7.5CA-TP operates across -55°C to 175°C ambient temperature range, providing the widest thermal envelope among all listed substitutes. This part is suitable for applications requiring extended high-temperature performance beyond the primary part's -65°C to 150°C junction temperature specification.
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