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MASMCJLCE28A/TR Equivalent & Substitute Parts
Part Overview
The MASMCJLCE28A/TR is a unidirectional transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection applications. This surface-mount component operates with a 28V reverse standoff voltage and provides clamping at 45.5V with a peak pulse current rating of 33A. The device is classified as Active product status and carries MIL-PRF-19500 military qualification. Substitute parts are identified to address inventory availability, alternative sourcing requirements, or application-specific performance needs while maintaining electrical and mechanical compatibility within defined parameter ranges.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 28 | V |
| Voltage - Breakdown (Min) | 31.1 | V |
| Voltage - Clamping (Max) @ Ipp | 45.5 | V |
| Current - Peak Pulse (10/1000µs) | 33 | A |
| Power - Peak Pulse | 1500 | W |
| Operating Temperature Range | -65 to 150 | °C (TJ) |
| Mounting Type | Surface Mount | — |
| Package / Case | DO-214AB, SMC | — |
| Type | Zener | — |
| Unidirectional Channels | 1 | — |
Substitute Part Grouping Explanation
Substitute parts for the MASMCJLCE28A/TR are grouped based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:
Critical Matching Parameters:
- Voltage - Reverse Standoff (Typ): 28V
- Voltage - Breakdown (Min): 31.1V (or 30V minimum acceptable)
- Voltage - Clamping (Max) @ Ipp: 45.4V to 45.5V range
- Package / Case: DO-214AB, SMC (surface mount)
- Unidirectional Channels: 1
- Type: Zener
- Mounting Type: Surface Mount
Performance Variation Parameters:
- Current - Peak Pulse (10/1000µs): 33A to 110A (higher ratings provide enhanced transient suppression capability)
- Power - Peak Pulse: 1500W to 5000W (higher ratings accommodate greater energy dissipation)
- Operating Temperature Range: -65°C to 175°C (extended ranges available)
Substitutes are classified into two categories: Direct Equivalents (matching clamping voltage and current specifications) and Enhanced Performance Alternatives (higher current and power ratings with identical voltage characteristics).
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Voltage - Reverse Standoff (V) | Voltage - Breakdown Min (V) | Voltage - Clamping Max @ Ipp (V) | Current - Peak Pulse (A) | Power - Peak Pulse (W) | Operating Temp (°C) | Package | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|
| MASMCJLCE28A/TR | Microchip Technology | 28 | 31.1 | 45.5 | 33 | 1500 | -65 to 150 | DO-214AB, SMC | Not specified |
| 1SMC28A TR13 TIN/LEAD | Central Semiconductor Corp | 28 | 31.1 | 45.4 | 33 | 1500 | -65 to 150 | DO-214AB, SMC | RoHS non-compliant |
| 3.0SMC28A | Littelfuse Inc. | 28 | 31.1 | 59 | 470 (8/20µs) | — | -65 to 150 | DO-214AB, SMC | ROHS3 Compliant |
| 3.0SMCJ28A-13 | Diodes Incorporated | 28 | 31.1 | 45.4 | 66.1 | 3000 | -55 to 175 | DO-214AB, SMC | ROHS3 Compliant |
| 5.0SMDJ28A | Taiwan Semiconductor Corporation | 28 | 31.1 | 45.4 | 110 | 5000 | -55 to 175 | DO-214AB, SMC | ROHS3 Compliant |
| 5.0SMDJ28A-T7 | Littelfuse Inc. | 28 | 31.1 | 45.4 | 110 | 5000 | -65 to 150 | DO-214AB, SMC | ROHS3 Compliant |
| 5.0SMDJ28AH | Taiwan Semiconductor Corporation | 28 | 31.1 | 45.4 | 110 | 5000 | -55 to 175 | DO-214AB, SMC | ROHS3 Compliant |
| LNBTVS4-304S | STMicroelectronics | 28 | 30 | 45 | 334 (8/20µs) | 22500 | -55 to 150 | DO-214AB, SMC | ROHS3 Compliant |
| LNBTVS6-304S | STMicroelectronics | 28 | 30 | 45 | 500 (8/20µs) | 22500 | -55 to 150 | DO-214AB, SMC | ROHS3 Compliant |
| SMC30J28A | STMicroelectronics | 28 | 31.1 | 45.4 | 66 | 3000 | -65 to 150 | DO-214AB, SMC | ROHS3 Compliant |
Engineering Selection Recommendations
Direct Electrical Equivalents (Identical Voltage and Current Specifications):
The 1SMC28A TR13 TIN/LEAD from Central Semiconductor Corp provides direct electrical equivalence with matching 28V standoff, 31.1V breakdown, 45.4V clamping, and 33A peak pulse current. This substitute maintains identical thermal operating range (-65°C to 150°C). However, this part carries RoHS non-compliant status, which may restrict use in applications requiring RoHS3 compliance.
Enhanced Performance Substitutes (Matched Voltage, Increased Current/Power):
The 3.0SMCJ28A-13 (Diodes Incorporated), 5.0SMDJ28A (Taiwan Semiconductor Corporation), 5.0SMDJ28A-T7 (Littelfuse Inc.), and 5.0SMDJ28AH (Taiwan Semiconductor Corporation) provide higher peak pulse current ratings (66.1A to 110A) and increased power dissipation (3000W to 5000W) while maintaining the 28V standoff and 45.4V clamping voltages. These parts are ROHS3 compliant. The 3.0SMCJ28A-13 and 5.0SMDJ28A variants support extended operating temperatures (-55°C to 175°C), providing thermal margin beyond the original specification.
High-Performance Alternatives (Elevated Clamping Voltage and Current):
The 3.0SMC28A (Littelfuse Inc.) offers 59V clamping with 470A peak pulse current (8/20µs pulse), suitable for applications requiring enhanced transient suppression with higher energy absorption. The LNBTVS4-304S and LNBTVS6-304S (STMicroelectronics TRANSIL™ series) provide 45V clamping with 334A and 500A peak pulse currents respectively (8/20µs pulse), delivering 22.5kW peak power dissipation. These high-performance alternatives are ROHS3 compliant and operate within -55°C to 150°C range.
Compliance Considerations:
All substitute parts except 1SMC28A TR13 TIN/LEAD carry ROHS3 compliance certification. The original MASMCJLCE28A/TR does not specify RoHS status. All listed parts maintain REACH Unaffected status and EAR99 export classification. The original part carries MIL-PRF-19500 military qualification; substitute parts do not specify military qualification status.
Frequently Asked Questions (FAQ)
Q: Can the 1SMC28A TR13 TIN/LEAD be used as a direct replacement for MASMCJLCE28A/TR?
A: Yes, the 1SMC28A TR13 TIN/LEAD provides direct electrical equivalence with identical voltage specifications (28V standoff, 31.1V breakdown, 45.4V clamping) and current rating (33A peak pulse). Both operate across -65°C to 150°C. The primary difference is RoHS compliance status; the substitute is RoHS non-compliant. Packaging is compatible (DO-214AB, SMC surface mount).
Q: What is the difference between the 3.0SMCJ28A-13 and 5.0SMDJ28A substitutes?
A: Both parts maintain identical voltage specifications (28V standoff, 31.1V breakdown, 45.4V clamping) and are ROHS3 compliant. The 5.0SMDJ28A provides higher peak pulse current (110A versus 66.1A) and greater power dissipation (5000W versus 3000W). The 5.0SMDJ28A supports extended operating temperature range (-55°C to 175°C versus -55°C to 175°C for 3.0SMCJ28A-13). Selection depends on transient energy requirements and thermal operating environment.
Q: Are the LNBTVS4-304S and LNBTVS6-304S suitable substitutes?
A: The LNBTVS series maintains the 28V standoff voltage and 45V clamping voltage (within acceptable tolerance). These parts deliver significantly higher peak pulse current (334A and 500A respectively, measured at 8/20µs pulse) and 22.5kW peak power dissipation compared to the original 33A and 1500W specification. These are high-performance alternatives for applications requiring enhanced transient suppression. Operating temperature range is -55°C to 150°C. All parts use DO-214AB, SMC surface-mount packaging.
Q: What packaging considerations apply to these substitutes?
A: All listed substitute parts use DO-214AB (SMC) surface-mount packaging, identical to the original MASMCJLCE28A/TR. Packaging compatibility is maintained across all substitutes. Tape & Reel (TR) and Cut Tape (CT) packaging options are available from various manufacturers. Moisture Sensitivity Level (MSL) is 1 (Unlimited) for all parts, indicating no moisture sensitivity restrictions.
Q: Can I use a higher-rated substitute (5000W) in place of the original 1500W part?
A: Yes. Higher current and power-rated substitutes (5.0SMDJ28A series at 110A and 5000W) maintain identical voltage specifications and provide enhanced transient suppression capability. These parts are electrically compatible and will not degrade circuit performance. Selection of higher-rated devices is appropriate when circuit transient energy exceeds the original specification or when thermal margin is required.
Q: What is the difference between 10/1000µs and 8/20µs pulse specifications?
A: The pulse waveform specification defines the test condition for peak pulse current rating. The original MASMCJLCE28A/TR uses 10/1000µs pulse specification (10µs rise time, 1000µs pulse width). The LNBTVS series uses 8/20µs specification (8µs rise time, 20µs pulse width). These represent different standardized test waveforms. Peak current values are not directly comparable between different pulse specifications; each rating applies to its specified waveform condition.
Q: Are all substitutes ROHS3 compliant?
A: All substitute parts except 1SMC28A TR13 TIN/LEAD carry ROHS3 compliance certification. The original MASMCJLCE28A/TR does not specify RoHS status. If RoHS3 compliance is required, use 3.0SMC28A, 3.0SMCJ28A-13, 5.0SMDJ28A, 5.0SMDJ28A-T7, 5.0SMDJ28AH, LNBTVS4-304S, LNBTVS6-304S, or SMC30J28A.
Q: Does the original part carry military qualification?
A: Yes, the MASMCJLCE28A/TR carries MIL-PRF-19500 military qualification. Substitute parts do not specify military qualification status in the provided data. If military qualification is required, verify qualification status with the manufacturer before substitution.
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