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Microchip Technology MPLAD36KP28CAE3
- Part No.:
- MPLAD36KP28CAE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD36KP28CAE3.pdf
- Description:
- TVS DIODE 28VWM 46.4VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:8,813
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Product details
Overview
MPLAD36KP28CAE3 from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace and automotive systems. It delivers 36 kW peak pulse power at 10/1000 μs, clamps at ≤46.4 V under 776 A peak impulse current, and features a 28 V reverse standoff voltage (VWM) with ±5% breakdown tolerance (31.1–34.4 V). It is qualified to AEC-Q101 and meets RTCA DO-160 Section 22 multi-stroke lightning requirements.
For engineers reviewing the MPLAD36KP28CAE3 datasheet, MPLAD36KP28CAE3 pinout, MPLAD36KP28CAE3 application, or MPLAD36KP28CAE3 equivalent, key selection criteria include its bidirectional polarity, 1.0 °C/W junction-to-case thermal resistance, RoHS-compliant matte-tin plating, IEC 61000-4-5 Class 4 secondary lightning protection (12 Ω source), and DO-160F Waveform 4 Level 4 pin injection capability up to 400 V standoff.
Technical Context
This TVS diode operates as a voltage-clamped crowbar device triggered by avalanche breakdown, with symmetrical bidirectional conduction enabling protection against both positive and negative transients without polarity sensitivity. Its low RθJC (1.0 °C/W) and void-free UL94V-0 epoxy package support high-reliability mounting on FR4 PCBs with thermal pad layout per spec.
It is characterized for operation across –55°C to +150°C junction temperature, with standby current ID ≤10 μA at VWM and clamping voltage VC = 46.4 V max at IPP = 776 A (10/1000 μs). Temperature coefficient αV(BR) is +26 mV/°C, ensuring predictable V(BR) drift over temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 36,000 W @ 10/1000 μs - sustains aircraft lightning-induced surges without failure |
| Reverse Standoff Voltage (VWM) | 28 V - maximum continuous operating voltage before clamping initiates |
| Breakdown Voltage (V(BR)) | 31.1–34.4 V @ 5 mA - defines precise avalanche onset threshold for design margining |
| Max Clamping Voltage (VC) | 46.4 V @ 776 A - limits downstream circuit voltage during worst-case surge |
| Junction-to-Case Thermal Resistance | 1.0 °C/W - enables effective heat transfer to heatsink or copper pour |
| Standby Current (ID) | ≤10 μA @ 28 V - negligible leakage in normal operation, preserving system efficiency |
| Temperature Coefficient (αV(BR)) | +26 mV/°C - quantifies V(BR) increase per degree, critical for high-temp design validation |
Pinout & Package
Package: PLAD (Plastic Leaded Anodeless Diode) - surface-mount, low-profile thermoset epoxy case (UL94V-0), metal base cathode termination, dimensions 12.32 × 10.54 × 5.08 mm (L × W × H), weight ~1.7–2.0 g. Cathode is the metal base (bottom side); anode is top-side metallization.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Top Metallization (Anode) | Anode connection | Connected to protected line; forms one side of bidirectional clamping path |
| Metal Base (Cathode) | Cathode connection | Common reference terminal; must be soldered to large copper area for thermal and electrical performance |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional construction | Enables symmetric protection of AC lines or floating DC buses without polarity constraints |
| RTCA DO-160F Waveform 4 Level 4 compliance | Withstands 6.4/69 μs pin-injection transients up to 400 V standoff, validated for avionics interfaces |
| IEC 61000-4-5 Class 4 (12 Ω source) | Supports secondary lightning protection in industrial control cabinets with 42 Ω or 12 Ω source impedance |
| AEC-Q101 qualification | Validated for automotive load-dump and alternator-spike environments per stress test requirements |
| Moisture Sensitivity Level 1 | Eliminates dry-pack requirement and bake-out prior to reflow, reducing manufacturing cost and risk |
Applications
| Aerospace Avionics Power Input | Automotive Engine Control Unit (ECU) |
|---|---|
Use Scenario: Protection of 28 V DC power inputs in flight management computers exposed to DO-160 Section 22 lightning-induced surges. IC Role / Device Role / Timing Role: Primary transient suppression element placed directly at connector entry point before upstream filtering. Use Value: Limits clamped voltage to 46.4 V, preventing damage to 36 V-rated DC-DC converters and microcontrollers. | Use Scenario: Guarding ECU 12 V supply rails against ISO 7637-2 load dump pulses and alternator transients. IC Role / Device Role / Timing Role: Fast-response crowbar device that clamps within <5 ns to protect sensitive CAN transceivers and analog sensors. Use Value: Withstands 36 kW surges while maintaining ≤10 μA leakage, avoiding battery drain in sleep mode. |
| Industrial Motor Drive DC Bus | Railway Signaling Interface |
Use Scenario: Safeguarding 24–32 V DC bus inputs in variable-frequency drives subjected to IEC 61000-4-5 Class 4 surges. IC Role / Device Role / Timing Role: Secondary protection stage after MOVs, absorbing residual energy with precise voltage clamping. Use Value: 1.0 °C/W RθJC allows direct thermal coupling to heatsink, sustaining repeated surge events without thermal runaway. | Use Scenario: Protecting 28 V signaling lines in trackside interlocking systems against induced lightning surges per EN 50121-4. IC Role / Device Role / Timing Role: Bidirectional clamp on differential RS-485 or MVB lines, eliminating need for dual unidirectional devices. Use Value: Symmetric V(BR) tolerance (±5%) ensures matched clamping in both directions, preserving signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ28CA | 600 W PPP rating, 5.0 mm × 4.5 mm SMB package, RθJC = 15 °C/W | Lower energy handling; suitable only for consumer-grade IEC 61000-4-2/4-4, not DO-160 or IEC 61000-4-5 Class 4 | Select when cost and board space constrain requirements below 5 kW surge duty. |
| SMCJ28CA | 1500 W PPP, 7.2 mm × 6.2 mm SMC package, RθJC = 3.5 °C/W, no AEC-Q101 or DO-160 qualification | Lacks aerospace screening and thermal performance for sustained multi-stroke events | Acceptable for industrial controls where full DO-160 compliance is not mandated. |
Compared with SMBJ28CA and SMCJ28CA, the MPLAD36KP28CAE3 provides 24× and 24× higher peak pulse power respectively, certified AEC-Q101 reliability, and DO-160F Waveform 4 Level 4 validation-making it the only option for certified avionics and high-end automotive power rail protection.
Availability
MPLAD36KP28CAE3 is available at Aetrix Electronics and suitable for aerospace avionics, automotive ECU power systems, industrial motor drive DC buses, and railway signaling interfaces requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for MPLAD36KP28CAE3 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 Corporation (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog, mixed-signal, and radiation-hardened solutions for aerospace, defense, and industrial markets.
The MPLAD36KP28CAE3 belongs to Microsemi's high-power PLAD-series TVS family, engineered specifically for multi-stroke lightning protection in safety-critical platforms where thermal robustness, AEC-Q101 qualification, and DO-160 compliance are mandatory.
FAQ
What is the clamping voltage of MPLAD36KP28CAE3 at its rated peak pulse current?
The MPLAD36KP28CAE3 has a maximum clamping voltage (VC) of 46.4 V at its peak impulse current (IPP) of 776 A under the standard 10/1000 μs waveform. This value is guaranteed across the operating temperature range and is critical for ensuring downstream components remain within their absolute maximum voltage ratings during surge events. The MPLAD36KP28CAE3 achieves this clamping performance while maintaining low thermal resistance (1.0 °C/W) to sustain repetitive surges.
Is MPLAD36KP28CAE3 suitable for automotive applications requiring AEC-Q101 qualification?
Yes, the MPLAD36KP28CAE3 is explicitly tested and qualified to AEC-Q101 standards for stress testing including HTGB, HTRB, TST, and mechanical shock. Its bidirectional construction, 28 V standoff, and 36 kW surge capability make it appropriate for protecting automotive engine control units, body control modules, and ADAS power supplies against load dump and alternator transients. The MPLAD36KP28CAE3 also supports optional MIL-PRF-19500 upscreening for extended reliability.
How does the PLAD package of MPLAD36KP28CAE3 improve thermal performance compared to standard SMC or SMB packages?
The PLAD package of the MPLAD36KP28CAE3 features a metal base cathode that serves as both electrical 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 (~3.5–15 °C/W). This enables efficient heat dissipation into PCB copper pours or heatsinks, allowing the MPLAD36KP28CAE3 to survive repeated 36 kW surges without thermal runaway. The void-free UL94V-0 epoxy body further enhances reliability under thermal cycling.
Does MPLAD36KP28CAE3 meet RTCA DO-160 Section 22 lightning protection requirements?
Yes, the MPLAD36KP28CAE3 is specifically designed and validated for RTCA DO-160 Section 22 multi-stroke lightning testing. It meets Waveform 4 (6.4/69 μs) Level 4 up to 400 V standoff and Waveform 5A (40/120 μs) Level 4 up to 78 V standoff. Its 36 kW rating, fast response (<5 ns), and bidirectional symmetry ensure robust protection for avionics power and data lines. The MPLAD36KP28CAE3 is referenced directly in Microsemi's DO-160 compliance documentation for the PLAD family.
What is the meaning of the "CA" and "E3" suffixes in MPLAD36KP28CAE3?
In MPLAD36KP28CAE3, "CA" denotes bidirectional polarity (C = common cathode configuration, A = axial lead variant adapted to surface mount), and "E3" specifies RoHS-compliant annealed matte-tin plating per JEDEC J-STD-020B Level 1 moisture sensitivity-no dry pack required. These suffixes confirm the device's symmetrical clamping behavior and lead-free assembly compatibility. The MPLAD36KP28CAE3 uses the same marking, plating, and packaging standards as other qualified PLAD-series parts.
MPLAD36KP28CAE3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- Nonstandard SMD
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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
MPLAD36KP28CAE3 FAQ
1.How can I place an order for MPLAD36KP28CAE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD36KP28CAE3 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 MPLAD36KP28CAE3 reliable?
The price and inventory of MPLAD36KP28CAE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD36KP28CAE3 is usually 5 days.
3.What payment methods are accepted for MPLAD36KP28CAE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD36KP28CAE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD36KP28CAE3?
MPLAD36KP28CAE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD36KP28CAE3 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 MPLAD36KP28CAE3?
For technical support, including MPLAD36KP28CAE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD36KP28CAE3 requirements.
6.How does Aetrix verify that MPLAD36KP28CAE3 is sourced from the original manufacturer or authorized distributors?
All MPLAD36KP28CAE3 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 MPLAD36KP28CAE3 meets industry standards.
7.What is the process for return or replacement of MPLAD36KP28CAE3?
All MPLAD36KP28CAE3 units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD36KP28CAE3, 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 MPLAD36KP28CAE3 part is unused and in its original packaging.
Return procedure for MPLAD36KP28CAE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD36KP28CAE3 Tags
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