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Microchip Technology MPLAD36KP400CA
- Part No.:
- MPLAD36KP400CA
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD36KP400CA.pdf
- Description:
- TVS DIODE 400VWM 644VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:7,838
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Product details
Overview
MPLAD36KP400CA from Microsemi is a bidirectional 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, features a 400 V reverse standoff voltage (VWM), clamps to ≤644 V at 50 A peak pulse current (IPP), and operates across –55°C to +150°C junction temperature - deployed in aircraft lightning protection per RTCA DO-160 Section 22.
For engineers reviewing the MPLAD36KP400CA datasheet, MPLAD36KP400CA pinout, MPLAD36KP400CA application, or MPLAD36KP400CA equivalent, key selection criteria include its bidirectional polarity, 400 V VWM rating, 644 V max clamping voltage at 50 A, IEC 61000-4-5 Class 5 compliance (42 Ω source), and RTCA DO-160F Waveform 4 Level 4 capability up to 400 V standoff.
Technical Context
This TVS diode uses silicon avalanche technology with low thermal resistance (RθJC = 1.0 °C/W) to sustain multi-stroke lightning transients. Its void-free UL94V-0 epoxy package and metal-base cathode construction enable efficient heat dissipation during repetitive 10/1000 μs surges at ≤0.05% duty factor.
It meets secondary lightning protection per IEC 61000-4-5 with 42 Ω, 12 Ω, and 2 Ω source impedances across Classes 1–5, and provides pin-injection immunity per RTCA DO-160F Waveforms 4 (6.4/69 μs) and 5A (40/120 μs), with derating guidance in MicroNote 132 and 134.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 36,000 W @ 10/1000 μs - sustains aircraft-grade lightning surges without failure |
| Reverse Standoff Voltage (VWM) | 400 V - maximum continuous DC or RMS operating voltage before conduction |
| Max Clamping Voltage (VC) | 644 V @ IPP = 50 A - limits downstream circuit voltage during surge event |
| Breakdown Voltage (V(BR)) | 444–492 V @ 5 mA - defines onset of avalanche conduction threshold |
| Junction-to-Case Thermal Resistance | 1.0 °C/W - enables direct mounting to heatsink for cumulative stroke handling |
| Operating Temperature Range | –55°C to +150°C - qualified for under-hood automotive and avionics environments |
| Moisture Sensitivity Level | Level 1 per J-STD-020B - no dry pack required; supports standard SMT reflow |
Pinout & Package
Package: PLAD (Plastic Leaded Anode/Cathode) - surface-mount, low-profile thermoset epoxy case with metal base cathode (unidirectional) or symmetrical bidirectional terminals; dimensions: 12.32 × 10.54 × 5.08 mm (L × W × H); weight: ~1.7–2.0 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Top Surface Pad) | Transient Current Entry (Bidirectional) | Accepts surge current in either polarity; symmetric terminal for CA-series devices |
| Cathode (Metal Base) | Transient Current Exit / Heat Sink Interface | Serves as primary thermal path to PCB copper pour or external heatsink; electrically active terminal |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional construction (CA suffix) | Protects AC-coupled or floating signal/power lines without polarity constraints |
| 3σ lot norm screening on ID | Ensures consistent standby leakage (<10 μA @ 400 V) across production lots |
| RTCA DO-160F Waveform 4 Level 4 compliance | Withstands 6.4/69 μs pin-injection surges up to 400 V standoff - critical for flight control interfaces |
| IEC 61000-4-5 Class 5 (42 Ω source) | Validated for secondary lightning protection in short-distance aircraft wiring harnesses |
| RoHS-compliant (e3 plating) | Tin-lead-free matte-tin terminations compatible with Pb-free reflow profiles per MIL-STD-750 |
Applications
| Aircraft Avionics Power Bus | Automotive Load Dump Protection |
|---|---|
Use Scenario: 28 V DC distribution bus in fly-by-wire systems exposed to lightning-induced transients per DO-160 Section 22. IC Role / Device Role / Timing Role: Primary transient suppression device placed at power entry point before DC-DC converters and motor controllers. Use Value: Limits clamped voltage to ≤644 V during 36 kW surges, preventing gate oxide breakdown in downstream MOSFETs and ICs. | Use Scenario: 12 V/24 V battery-fed ECU inputs subjected to ISO 7637-2 Load Dump pulses (up to 120 V, 400 ms). IC Role / Device Role / Timing Role: High-energy clamp protecting CAN transceivers, microcontrollers, and sensor front-ends from alternator overvoltage events. Use Value: Absorbs >99% of 36 kW surge energy without degradation, enabling single-device protection vs. multi-stage designs. |
| Industrial Motor Drive DC Link | Railway Signaling Interface |
Use Scenario: DC link between rectifier and inverter in 3-phase motor drives subject to switching transients and induced RFI. IC Role / Device Role / Timing Role: Bidirectional TVS placed across DC+ and DC− rails to suppress commutation spikes and EFT bursts. Use Value: Withstands repetitive 10/1000 μs surges at 0.05% duty cycle - validated for cumulative heating per RF01216 Rev B. | Use Scenario: 110 V DC signaling lines in train control systems requiring IEC 61000-4-5 Class 4 immunity (2 Ω source). IC Role / Device Role / Timing Role: Secondary surge protector on trackside interface cards connected to long cable runs. Use Value: Meets Class 4 requirement up to 130 V VWM - MPLAD36KP400CA's 400 V rating allows margin for system voltage drift and tolerance stack-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ400CA | 600 W PPP rating, 5.0 mm × 3.9 mm SMB package, RθJC ≈ 25 °C/W | Not suitable for DO-160 multi-stroke or IEC 61000-4-5 Class 5; limited to consumer/industrial single-event use | Select only for cost-sensitive, low-energy applications where 36 kW capability is unnecessary |
| SMCJ400CA | 1500 W PPP rating, 7.1 mm × 6.2 mm SMC package, RθJC ≈ 12 °C/W | Lacks RTCA DO-160F Waveform 4 Level 4 validation and MIL-PRF-19500 screening options | Use where higher energy than SMBJ is needed but full aerospace qualification is not required |
Compared with SMBJ400CA and SMCJ400CA, the MPLAD36KP400CA delivers 24× and 24× higher peak pulse power respectively, enables direct heatsink mounting via metal base, and is qualified for multi-stroke lightning per DO-160 - making it the only option for certified avionics and high-reliability industrial power entry protection.
Availability
MPLAD36KP400CA is available at Aetrix Electronics and suitable for aircraft avionics, automotive ECUs, and industrial motor drive designs requiring stable component supply, long-term lifecycle support, and traceable high-reliability sourcing.
Supply support for MPLAD36KP400CA 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 MPLAD36KP400CA belongs to Microsemi's PLAD-series high-power TVS family, engineered specifically for multi-stroke lightning protection in safety-critical platforms where thermal robustness and qualification to RTCA DO-160 and MIL-PRF-19500 are mandatory.
FAQ
What is the clamping voltage of MPLAD36KP400CA at its rated peak pulse current?
The MPLAD36KP400CA has a maximum clamping voltage (VC) of 644 V when subjected to a 50 A peak pulse current (IPP) under 10/1000 μs waveform conditions. This value is measured per Figure 3 in RF01216 Rev B and ensures downstream components remain below their absolute maximum voltage ratings during surge events. The MPLAD36KP400CA maintains this clamping performance across its full operating temperature range.
Is MPLAD36KP400CA qualified for RTCA DO-160F lightning testing?
Yes, the MPLAD36KP400CA is explicitly validated for RTCA DO-160F Section 22 lightning-induced transient testing. It meets Waveform 4 (6.4/69 μs) Level 4 up to 400 V VWM and is rated for multi-stroke capability - a requirement for primary and secondary protection in commercial aircraft systems. This qualification is documented in Microsemi's RF01216 Rev B datasheet and supported by MicroNote 132 for temperature derating.
Does MPLAD36KP400CA require a heatsink for reliable operation?
The MPLAD36KP400CA features a metal base cathode designed for direct thermal coupling to PCB copper pours or external heatsinks. While not always mandatory for single-event surges, a heatsink is strongly recommended for repetitive 10/1000 μs transients (e.g., DO-160 multi-stroke testing) due to its 1.0 °C/W junction-to-case thermal resistance. Mounting per the recommended pad layout in RF01216 Rev B is essential to achieve rated PPP and avoid thermal runaway.
What is the polarity configuration of MPLAD36KP400CA?
The MPLAD36KP400CA is a bidirectional TVS diode, indicated by the "CA" suffix in its part number. Unlike unidirectional variants (e.g., MPLAD36KP400A), it conducts symmetrically in both directions - making it suitable for AC lines, differential buses, or floating DC systems where polarity reversal may occur. Its terminals are electrically identical; the metal base serves as one terminal, and the top surface pad as the other.
How does MPLAD36KP400CA differ from standard SMCJ400CA in surge handling?
The MPLAD36KP400CA delivers 36,000 W peak pulse power - 24× higher than the 1500 W rating of SMCJ400CA - and is qualified to RTCA DO-160F Waveform 4 Level 4 and IEC 61000-4-5 Class 5 (42 Ω). Its PLAD package offers 1.0 °C/W thermal resistance versus ~12 °C/W for SMC, enabling sustained multi-stroke performance. The MPLAD36KP400CA also supports MIL-PRF-19500 upscreening, which SMCJ400CA does not.
MPLAD36KP400CA 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):
- 400V
- Voltage - Breakdown (Min):
- 444V
- Voltage - Clamping (Max) @ Ipp:
- 644V
- Current - Peak Pulse (10/1000µs):
- 56A
- 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
MPLAD36KP400CA FAQ
1.How can I place an order for MPLAD36KP400CA through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD36KP400CA 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 MPLAD36KP400CA reliable?
The price and inventory of MPLAD36KP400CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD36KP400CA is usually 5 days.
3.What payment methods are accepted for MPLAD36KP400CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD36KP400CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD36KP400CA?
MPLAD36KP400CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD36KP400CA 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 MPLAD36KP400CA?
For technical support, including MPLAD36KP400CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD36KP400CA requirements.
6.How does Aetrix verify that MPLAD36KP400CA is sourced from the original manufacturer or authorized distributors?
All MPLAD36KP400CA 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 MPLAD36KP400CA meets industry standards.
7.What is the process for return or replacement of MPLAD36KP400CA?
All MPLAD36KP400CA units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD36KP400CA, 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 MPLAD36KP400CA part is unused and in its original packaging.
Return procedure for MPLAD36KP400CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD36KP400CA Tags
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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Nexperia USA Inc.
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