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Microchip Technology MPLAD36KP28AE3
- Part No.:
- MPLAD36KP28AE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD36KP28AE3.pdf
- Description:
- TVS DIODE 28VWM 46.4VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:6,797
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Product details
Overview
MPLAD36KP28AE3 from Microsemi is a unidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace, automotive, and industrial power systems. It delivers 36 kW peak pulse power at 10/1000 μs, clamps transients to ≤46.4 V at 776 A, and operates with a 28 V reverse standoff voltage (VWM) and 31.1–34.4 V breakdown voltage (V(BR)). It meets RTCA DO-160 Section 22 multi-stroke lightning requirements and IEC 61000-4-5 Class 4 (42 Ω source) for secondary lightning protection.
For engineers reviewing the MPLAD36KP28AE3 datasheet, MPLAD36KP28AE3 pinout, MPLAD36KP28AE3 application, or MPLAD36KP28AE3 equivalent, this device is selected for high-reliability DC bus protection where low clamping voltage, sub-100 ps response time, RoHS-compliant SMT packaging, and AEC-Q101 qualification are critical - especially in avionics power distribution units and 24 V vehicle load-dump circuits.
Technical Context
This TVS diode uses silicon avalanche junction technology optimized for fast response (<5 ns rise time) and low dynamic impedance under high-current surges. Its metal-base thermal path enables 1.0 °C/W junction-to-case thermal resistance, supporting sustained multi-pulse operation when mounted on FR4 with recommended pad layout.
The device is characterized per IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and RTCA DO-160F Waveform 4 & 5A pin-injection testing. Standby current ID is screened to 3σ lot norm at VWM, and all units undergo 100% surge testing per specification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 36,000 W @ 10/1000 μs - sustains aircraft lightning-induced transients without failure |
| Reverse Standoff Voltage (VWM) | 28 V - matches nominal 24 V DC systems with 15–20% margin for ripple and tolerance |
| Breakdown Voltage (V(BR)) | 31.1–34.4 V @ 5 mA - ensures reliable avalanche initiation before downstream component damage |
| Max Clamping Voltage (VC) | 46.4 V @ 776 A - limits protected circuit voltage to safe levels during worst-case surge |
| Junction-to-Case Thermal Resistance | 1.0 °C/W - enables efficient heat transfer to PCB copper pour or heatsink for repeated surges |
| Response Time | <5 ns - suppresses fast-rising ESD/EFT transients before IC latch-up or gate oxide rupture |
| RoHS Compliance | e3 marking - lead-free matte-tin plating compatible with standard reflow profiles and IPC/JEDEC J-STD-020B Level 1 moisture sensitivity |
Pinout & Package
Package: PLAD (Plastic Leaded Anode Down) - void-free UL94V-0 epoxy body with metal base acting as cathode terminal; dimensions: 12.32 × 10.54 × 5.08 mm (L × W × H); weight: ~1.85 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (top surface pad) | Transient current entry point | Soldered to protected line (e.g., 24 V rail); low-inductance path minimizes voltage overshoot |
| Cathode (metal base underside) | Current return path / heat sink interface | Direct thermal conduction to PCB ground plane or heatsink; polarity-marked on unidirectional variants |
Key Features
| Feature | Design Value |
|---|---|
| High-reliability wafer lot traceability | Full fabrication and assembly traceability supports aerospace DO-160 and MIL-PRF-19500 upscreening programs |
| Low-profile SMT package | 5.08 mm height enables use in space-constrained avionics modules without compromising thermal performance |
| RTCA DO-160F Waveform 4 & 5A compliance | Validated for pin-injection immunity up to Level 5 (Waveform 4: 25°C, 6.4/69 μs; Waveform 5A: 40/120 μs) |
| AEC-Q101 qualified | Stress-tested for automotive underhood environments including temperature cycling, humidity, and mechanical shock |
| IEC 61000-4-5 Class 4 support (42 Ω) | Rated for secondary lightning protection in long-distance wiring configurations per IEC 61000-4-5 |
Applications
| Aerospace Power Distribution | Automotive Load-Dump Protection |
|---|---|
Use Scenario: 28 V DC main bus in commercial aircraft avionics bays exposed to lightning-induced surges per RTCA DO-160 Section 22. IC Role / Device Role / Timing Role: Unidirectional TVS placed at bus input to clamp transients before they reach power converters and flight control electronics. Use Value: 36 kW PPP rating and <5 ns response ensure compliance with multi-stroke lightning standards without derating or parallel devices. |
Use Scenario: 24 V battery-fed engine control unit (ECU) subjected to ISO 7637-2 Pulse 5a (load dump). IC Role / Device Role / Timing Role: Primary surge suppression element across battery input, absorbing energy before upstream fuse or DC-DC regulator. Use Value: 46.4 V clamping at 776 A prevents overvoltage damage to 36 V-rated MOSFETs and microcontrollers in under-hood environments. |
| Industrial Motor Drive DC Link | Railway Signaling Power Supply |
Use Scenario: DC link of 400 V industrial VFD exposed to switching transients and induced RFI from adjacent IGBTs. IC Role / Device Role / Timing Role: Bidirectional-capable variant used (MPLAD36KP28CA) across DC+ and DC− to suppress bidirectional ringing and commutation spikes. Use Value: Low dynamic impedance maintains clamping stability across repetitive 100 Hz–1 kHz transients without thermal runaway. |
Use Scenario: 110 V DC signaling power supply in European railway interlocking systems requiring EN 50121-4 immunity. IC Role / Device Role / Timing Role: Secondary protection stage after MOV-based front-end, handling residual fast transients missed by bulk suppressors. Use Value: Sub-100 ps response captures high-frequency edge components of lightning surges that degrade signal integrity in safety-critical comms lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ28A | Lower PPP (600 W), smaller SMB package, higher clamping (45.4 V @ 13.3 A) | Suitable only for low-energy ESD/EFT; cannot meet DO-160 Section 22 multi-stroke or IEC 61000-4-5 Class 4 | Select SMBJ28A only for cost-sensitive consumer-grade 24 V interfaces with no lightning or load-dump requirements. |
| SMCJ28A | Higher PPP (1500 W), larger SMC package, clamping 45.4 V @ 33.2 A, no AEC-Q101 or DO-160 validation | Lacks aerospace qualification and thermal robustness for repeated surges; limited to single-event industrial transients | Choose SMCJ28A for non-safety-critical industrial controls where full DO-160 compliance is not mandated. |
Compared with SMBJ28A and SMCJ28A, the MPLAD36KP28AE3 provides 24× and 24× higher peak power handling respectively, validated thermal design for multi-pulse operation, and formal qualification for aviation and automotive safety-critical systems - making it irreplaceable in applications demanding certified lightning resilience.
Availability
MPLAD36KP28AE3 is available at Aetrix Electronics and suitable for aerospace power distribution, automotive load-dump protection, and industrial motor drive DC link applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for MPLAD36KP28AE3 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microsemi (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog, RF, and timing solutions for aerospace, defense, and industrial markets.
The MPLAD36KP28AE3 belongs to Microsemi's PLAD-series high-power TVS family, engineered specifically for certified lightning and load-dump protection in mission-critical DC power systems where failure is not an option.
FAQ
What is the clamping voltage of MPLAD36KP28AE3 at its rated peak pulse current?
The MPLAD36KP28AE3 has a maximum clamping voltage (VC) of 46.4 V at its rated peak pulse current (IPP) of 776 A under 10/1000 μs waveform conditions. This value is measured per IEC 61000-4-5 test methodology and guarantees the protected circuit remains below 47 V during worst-case surge events. The clamping performance is validated across temperature and production lots, ensuring consistent behavior in field-deployed MPLAD36KP28AE3 units.
Is MPLAD36KP28AE3 qualified for automotive applications?
Yes, MPLAD36KP28AE3 is AEC-Q101 qualified, meaning it has passed stress tests for temperature cycling, humidity, mechanical shock, and high-temperature operating life required for automotive underhood and powertrain applications. Its 28 V VWM and 46.4 V clamping align with ISO 7637-2 Pulse 5a load-dump specifications, and it is routinely deployed in engine control units and battery management systems where reliability under extreme thermal and electrical stress is mandatory.
How does the PLAD package of MPLAD36KP28AE3 improve thermal performance compared to standard SMC or SMB packages?
The PLAD package of MPLAD36KP28AE3 features a metal base acting as both cathode terminal and primary thermal path, achieving a junction-to-case thermal resistance of just 1.0 °C/W - over 10× better than typical SMC packages (~12 °C/W). When soldered to a large copper pour or heatsink, this enables rapid dissipation of 36 kW surge energy across multiple pulses without thermal runaway, a capability essential for DO-160 Section 22 multi-stroke lightning compliance that standard packages cannot sustain.
Does MPLAD36KP28AE3 meet RTCA DO-160F lightning protection requirements?
Yes, MPLAD36KP28AE3 is explicitly validated for RTCA DO-160F Section 22 multi-stroke lightning testing, including Waveform 4 (6.4/69 μs) Level 5 and Waveform 5A (40/120 μs) Level 4. Its 36 kW PPP rating, sub-5 ns response, and low clamping voltage ensure compliance with aircraft-level surge immunity requirements. Documentation confirming DO-160F test results is included in Microsemi's RF01216 Rev B datasheet and associated MicroNotes.
What is the meaning of the 'E3' suffix in MPLAD36KP28AE3?
Within the MPLAD36KP28AE3 part number, the 'E3' suffix indicates RoHS-compliant construction using annealed matte-tin plating on terminals, fully compliant with IPC/JEDEC J-STD-020B Level 1 moisture sensitivity and suitable for standard Pb-free reflow profiles. This distinguishes it from non-RoHS variants (blank suffix) and confirms compatibility with modern electronics manufacturing processes while maintaining the same electrical and thermal performance as legacy versions.
MPLAD36KP28AE3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- Nonstandard SMD
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 28V
- Voltage - Breakdown (Min):
- 31.1V
- Voltage - Clamping (Max) @ Ipp:
- 46.4V
- Current - Peak Pulse (10/1000µs):
- 776A
- Power - Peak Pulse:
- 36000W (36kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Military
- Qualification:
- MIL-PRF-19500
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PLAD
MPLAD36KP28AE3 FAQ
1.How can I place an order for MPLAD36KP28AE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD36KP28AE3 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MPLAD36KP28AE3 reliable?
The price and inventory of MPLAD36KP28AE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD36KP28AE3 is usually 5 days.
3.What payment methods are accepted for MPLAD36KP28AE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD36KP28AE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD36KP28AE3?
MPLAD36KP28AE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD36KP28AE3 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MPLAD36KP28AE3?
For technical support, including MPLAD36KP28AE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD36KP28AE3 requirements.
6.How does Aetrix verify that MPLAD36KP28AE3 is sourced from the original manufacturer or authorized distributors?
All MPLAD36KP28AE3 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MPLAD36KP28AE3 meets industry standards.
7.What is the process for return or replacement of MPLAD36KP28AE3?
All MPLAD36KP28AE3 units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD36KP28AE3, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MPLAD36KP28AE3 part is unused and in its original packaging.
Return procedure for MPLAD36KP28AE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD36KP28AE3 Tags
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