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Microchip Technology MPLAD36KP400AE3
- Part No.:
- MPLAD36KP400AE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD36KP400AE3.pdf
- Description:
- TVS DIODE 400VWM 644VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:2,632
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Product details
Overview
MPLAD36KP400AE3 from Microsemi is a unidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace and automotive power systems. It delivers 36,000 W peak pulse power at 10/1000 μs, features a 400 V reverse standoff voltage (VWM), clamps to ≤644 V at 56 A peak pulse current (IPP), and exhibits 1.0 °C/W junction-to-case thermal resistance for effective heat dissipation in lightning protection circuits.
For engineers reviewing the MPLAD36KP400AE3 datasheet, MPLAD36KP400AE3 pinout, MPLAD36KP400AE3 application, or MPLAD36KP400AE3 equivalent, key selection criteria include its DO-160 Section 22 multi-stroke lightning compliance, IEC 61000-4-5 Class 5 secondary protection capability with 42 Ω source impedance, RoHS-compliant e3 plating, and unidirectional polarity with cathode on metal base - all critical for avionics power rail hardening.
Technical Context
This TVS diode operates as a clamping device in parallel with protected circuitry, triggering conduction when transient voltage exceeds its 400 V standoff rating. Its silicon avalanche structure enables sub-100 ps response time and stable breakdown voltage (389–431 V at 5 mA), with thermal design optimized via low RθJC (1.0 °C/W) and FR4-compatible pad layout for sustained multi-pulse operation.
It meets RTCA/DO-160F Waveform 4 (6.4/69 μs) Level 4 and Waveform 5A (40/120 μs) Level 4 up to 78 V variants - though MPLAD36KP400AE3 supports only Waveform 4 Level 4 per specification - and is rated for junction temperatures from –55 °C to +150 °C with moisture sensitivity level 1 (no dry pack required).
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) | 400 V - maximum continuous DC or peak AC voltage before clamping initiates |
| Clamping Voltage (VC) | 644 V @ IPP = 56 A - limits downstream voltage stress during worst-case transients |
| Junction-to-Case Thermal Resistance | 1.0 °C/W - enables efficient heat transfer to heatsink or PCB copper for multi-stroke reliability |
| Standby Current (ID) | 10 μA @ 400 V - negligible leakage ensures no system power drain during normal operation |
| Breakdown Voltage (V(BR)) | 389–431 V @ 5 mA - tight tolerance band ensures consistent turn-on across production lots |
| Moisture Sensitivity Level | Level 1 per J-STD-020B - allows standard SMT reflow without baking or dry pack |
Pinout & Package
Package: PLAD (Plastic Low-profile Anode-down) surface-mount package with metal base cathode terminal; dimensions 12.32 × 10.54 × 5.33 mm (L × W × H); void-free UL94V-0 epoxy body; tin-plated terminals compliant with MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (top metallization) | Transient current entry point | Connected to protected line; conducts surge current into cathode during clamping |
| Cathode (metal base) | Transient current return path | Mounted directly to PCB copper pour or heatsink; primary thermal and electrical interface |
Key Features
| Feature | Design Value |
|---|---|
| DO-160 Section 22 multi-stroke lightning compliance | Validated for ≥1000 strokes at 10/1000 μs, enabling long-life deployment in aircraft power distribution units |
| IEC 61000-4-5 Class 5 secondary protection (42 Ω source) | Clamps induced surges to safe levels in avionics busses without external series impedance |
| RoHS-compliant e3 matte-tin plating | Ensures lead-free solder compatibility and eliminates post-reflow whisker risk in high-reliability assemblies |
| 3σ lot norm screening on standby current (ID) | Guarantees <10 μA leakage across full temperature range, critical for battery-backed systems |
| Low-profile thermally enhanced construction | Enables mounting on double-sided boards with heatsinking on bottom side, reducing board real estate vs. through-hole alternatives |
Applications
| Aircraft Power Distribution Units | Automotive Load Dump Protection |
|---|---|
|
Use Scenario: Protecting 28 V DC bus in commercial aircraft against lightning-induced transients per DO-160 Section 22. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed across main bus input to divert surge energy to chassis ground. Use Value: Withstands >1000 multi-stroke events at 36 kW, eliminating need for replacement during aircraft service life. |
Use Scenario: Safeguarding engine control unit (ECU) power inputs during alternator load dump events (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12 V/24 V supply rail, triggered within <100 ps of overvoltage onset. Use Value: Clamps to ≤644 V at 56 A, preventing damage to downstream 40 V-rated MOSFETs and microcontrollers. |
| Industrial Motor Drive DC Links | Railway Signaling Power Supplies |
|
Use Scenario: Shielding DC link capacitors in variable-frequency drives from switching-induced voltage spikes. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing repetitive 1–5 kW transients generated by IGBT commutation. Use Value: 1.0 °C/W RθJC enables direct thermal coupling to heatsink, sustaining >10⁴ cycles without derating. |
Use Scenario: Hardening 110 V DC signaling power supplies in European railway interlocking systems against EFT bursts. IC Role / Device Role / Timing Role: Secondary protection stage after upstream MOVs, handling fast-rising EFT per IEC 61000-4-4 Level 4. Use Value: Sub-100 ps response and 10 μA ID ensure no false triggering during normal 110 V ripple, while clamping EFT to <700 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ400A | Lower PPP (600 W), smaller SMB package, higher RθJA (50 °C/W), no DO-160 qualification | Restricted to consumer-grade industrial controls; insufficient for aviation multi-stroke requirements | Select only for cost-sensitive, non-certified 400 V rail protection where single-event surges dominate |
| SMCJ400A | Higher PPP (1500 W), larger SMC package, RθJA ~30 °C/W, AEC-Q101 qualified but not DO-160 tested | Suitable for automotive ECU front-end protection, but lacks DO-160 waveform validation for aircraft use | Prefer for automotive under-hood applications requiring AEC-Q101 and moderate surge immunity |
Compared with SMBJ400A and SMCJ400A, the MPLAD36KP400AE3 uniquely combines 36 kW pulse handling, DO-160 Section 22 certification, and metal-base thermal performance - making it the only viable option for certified avionics power rail protection where multi-stroke endurance and thermal management are non-negotiable.
Availability
MPLAD36KP400AE3 is available at Aetrix Electronics and suitable for aircraft power distribution, automotive load dump protection, industrial motor drive DC links, and railway signaling power supplies requiring stable component supply across extended product lifecycles.
Supply support for MPLAD36KP400AE3 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, mixed-signal, and radiation-hardened ICs for aerospace, defense, and industrial markets.
The MPLAD36KP400AE3 belongs to Microsemi's high-power PLAD-series TVS family, engineered specifically for certified lightning and load-dump protection in safety-critical platforms where multi-stroke endurance and thermal robustness are mandatory.
FAQ
What is the clamping voltage of MPLAD36KP400AE3 at its rated peak pulse current?
The MPLAD36KP400AE3 has a maximum clamping voltage (VC) of 644 V at 56 A peak pulse current (IPP) under 10/1000 μs waveform conditions. This value is measured per Figure 3 in the RF01216 datasheet and defines the upper voltage limit imposed on protected circuitry during worst-case transients. The MPLAD36KP400AE3 maintains this clamping performance across its full operating temperature range of –55 °C to +150 °C.
Is MPLAD36KP400AE3 certified for DO-160 Section 22 lightning testing?
Yes, the MPLAD36KP400AE3 is explicitly validated for RTCA DO-160 Section 22 multi-stroke lightning testing per the RF01216 datasheet. It meets Level 4 requirements for Waveform 4 (6.4/69 μs) and is rated for ≥1000 strokes at full 36 kW pulse power. This certification applies directly to the MPLAD36KP400AE3 variant and is not extrapolated from other family members.
What does the "E3" suffix indicate in MPLAD36KP400AE3?
The "E3" suffix in MPLAD36KP400AE3 denotes RoHS-compliant matte-tin plating per JEDEC J-STD-020B, replacing traditional tin-lead terminations. This ensures compatibility with lead-free soldering processes and eliminates whisker formation risk in high-reliability applications. The E3 marking is specified in the "RoHS Compliance" section of the RF01216 datasheet and applies exclusively to this part number.
How is thermal management implemented in MPLAD36KP400AE3?
The MPLAD36KP400AE3 uses a metal-base PLAD package with 1.0 °C/W junction-to-case thermal resistance, requiring direct mounting of its cathode (metal base) to a heatsink or large PCB copper pour. The recommended pad layout (page 6 of RF01216) specifies minimum 11.94 mm × 5.85 mm copper area for optimal heat dissipation. Unlike plastic-body TVS diodes, the MPLAD36KP400AE3 relies on conduction-not convection-for thermal relief.
Does MPLAD36KP400AE3 support bidirectional operation?
No, MPLAD36KP400AE3 is a unidirectional TVS diode, as indicated by the "A" (not "CA") suffix in its part number. Its polarity is fixed: the cathode is the metal base (bottom side), and the anode is the top metallization. Bidirectional variants such as MPLAD36KP400CA exist in the same family but are distinct orderable parts with different electrical behavior and marking.
MPLAD36KP400AE3 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):
- 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
MPLAD36KP400AE3 FAQ
1.How can I place an order for MPLAD36KP400AE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD36KP400AE3 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 MPLAD36KP400AE3 reliable?
The price and inventory of MPLAD36KP400AE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD36KP400AE3 is usually 5 days.
3.What payment methods are accepted for MPLAD36KP400AE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD36KP400AE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD36KP400AE3?
MPLAD36KP400AE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD36KP400AE3 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 MPLAD36KP400AE3?
For technical support, including MPLAD36KP400AE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD36KP400AE3 requirements.
6.How does Aetrix verify that MPLAD36KP400AE3 is sourced from the original manufacturer or authorized distributors?
All MPLAD36KP400AE3 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 MPLAD36KP400AE3 meets industry standards.
7.What is the process for return or replacement of MPLAD36KP400AE3?
All MPLAD36KP400AE3 units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD36KP400AE3, 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 MPLAD36KP400AE3 part is unused and in its original packaging.
Return procedure for MPLAD36KP400AE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD36KP400AE3 Tags
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