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Microchip Technology MPLAD36KP30A
- Part No.:
- MPLAD36KP30A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD36KP30A.pdf
- Description:
- TVS DIODE 30VWM 48.8VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:4,646
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Product details
Overview
MPLAD36KP30A 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 ≤48.8 V at 738 A, and features a 30 V reverse standoff voltage (VWM), 33.3–36.8 V breakdown voltage (V(BR)), and 1.0 °C/W junction-to-case thermal resistance - enabling robust secondary lightning protection per RTCA DO-160 Section 22 and IEC 61000-4-5.
For engineers reviewing the MPLAD36KP30A datasheet, MPLAD36KP30A pinout, MPLAD36KP30A application, or MPLAD36KP30A equivalent, this part is selected for high-reliability DC bus protection where multi-stroke surge immunity, low-profile SMT integration, and AEC-Q101 qualification are required - especially in avionics power distribution units, engine control modules, and railway traction converters.
Technical Context
The MPLAD36KP30A employs an avalanche diode structure optimized for fast response (<100 ps turn-on) and low clamping ratio (VC/V(BR) ≈ 1.46). Its metal-base package provides direct thermal path to PCB copper, supporting sustained surge handling under 0.05% duty cycle per Figure 2.
It meets RTCA DO-160F Waveform 4 (6.4/69 μs) Level 4 and Waveform 5A (40/120 μs) Level 4 up to 300 V standoff, with full compliance to IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and IEC 61000-4-5 (lightning) using 2 Ω, 12 Ω, and 42 Ω source impedances - validated across Class 1–5 test levels per specification table.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 36,000 W @ 10/1000 μs - sustains single-stroke lightning surges without degradation |
| Reverse Standoff Voltage (VWM) | 30 V - sets maximum continuous operating voltage before clamping activation |
| Breakdown Voltage (V(BR)) | 33.3–36.8 V @ 5 mA - defines precise avalanche onset threshold for predictable clamping |
| Max Clamping Voltage (VC) | 48.8 V @ 738 A - limits downstream voltage stress during worst-case surge |
| Junction-to-Case Thermal Resistance | 1.0 °C/W - enables efficient heat transfer to heatsink or copper pour for thermal reliability |
| Steady-State Power Dissipation | 2.5 W @ TA = 25°C - supports low-duty-cycle biasing without derating |
| Moisture Sensitivity Level | Level 1 per J-STD-020B - allows standard SMT reflow without dry-pack preconditioning |
Pinout & Package
Package: PLAD (Plastic Leaded Anode Down) - void-free UL94V-0 epoxy body with metal base cathode terminal; dimensions: 12.32 × 10.54 × 5.08 mm (L × W × H); weight: ~1.7–2.0 g; polarity marked on unidirectional versions only (cathode on metal base).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (top surface pad) | Surge current entry point | Connected to protected line; carries full IPP during clamping event |
| Cathode (metal base) | Surge current return path | Direct thermal interface to PCB ground plane or heatsink; lowest-inductance return |
Key Features
| Feature | Design Value |
|---|---|
| Aerospace-grade surge rating | Validated to RTCA DO-160 Section 22 multi-stroke lightning - critical for flight-critical power rails |
| Low-profile SMT package | Height ≤ 5.33 mm - fits constrained avionics enclosures while maintaining 36 kW capability |
| Traceable wafer & assembly lots | Full lot traceability per MIL-PRF-19500 - satisfies DoD and FAA configuration management requirements |
| AEC-Q101 qualified | Tested per automotive stress standards - suitable for under-hood engine control and battery management |
| RoHS-compliant (e3) | Tin-plated terminals meeting JEDEC J-STD-020B - compatible with lead-free reflow profiles |
Applications
| Aircraft Power Distribution Unit | Automotive Engine Control Module |
|---|---|
Use Scenario: Protecting 28 V DC bus inputs in airborne power supplies against lightning-induced transients per DO-160F Section 22. IC Role / Device Role / Timing Role: Primary secondary surge clamp on main input rail, activated within <100 ps of overvoltage onset. Use Value: Enables compliance with Level 4 pin-injection (Waveform 4) and Class 5 lightning (42 Ω source) without external heatsinking. |
Use Scenario: Safeguarding 12 V/24 V microcontroller supply lines in diesel engine ECU against load dump spikes up to 120 V. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery feed and LDO input to limit voltage excursion during ISO 7637-2 Pulse 5a events. Use Value: Withstands 738 A peak current at 48.8 V clamping, preventing brownout or latch-up in safety-critical MCU domains. |
| Railway Traction Converter | Industrial UPS Input Stage |
Use Scenario: Shielding IGBT gate drivers and auxiliary power supplies in 750 V DC metro traction inverters from switching-induced RFI and grid surges. IC Role / Device Role / Timing Role: Fast-response TVS on isolated DC/DC converter inputs to suppress coupled transients from high-di/dt main inverter legs. Use Value: 1.0 °C/W RθJC enables direct mounting to aluminum chassis, sustaining repeated 36 kW surges without thermal runaway. |
Use Scenario: Securing AC-DC front-end rectifier outputs in 3-phase industrial UPS systems exposed to utility switching transients and nearby lightning strikes. IC Role / Device Role / Timing Role: Bidirectional-capable variant (MPLAD36KP30CA) used across phase-neutral lines to clamp both polarities of differential-mode surges. Use Value: Meets IEC 61000-4-5 Class 4 (12 Ω source) with 48.8 V clamping - preserves hold-up capacitor integrity and prevents MOSFET avalanche failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30A | 600 W PPP rating, 30 V VWM, DO-214AA package, RθJA = 40 °C/W | Limited to single-stroke surges; insufficient for DO-160 multi-stroke or IEC 61000-4-5 Class 4/5 | Select when cost-sensitive, low-energy environments require basic ESD/EFT protection only |
| SMCJ30A | 1500 W PPP rating, 30 V VWM, DO-214AB package, RθJA = 25 °C/W | Cannot sustain 36 kW pulses; clamps at 48.4 V @ 123 A - inadequate for 738 A surge currents | Choose for space-constrained designs needing higher energy than SMBJ but below MPLAD36KP30A's class |
Compared with SMBJ30A and SMCJ30A, the MPLAD36KP30A delivers 24× and 24× higher peak pulse power respectively, with verified multi-stroke endurance, AEC-Q101 qualification, and thermal performance enabling direct PCB-mount operation in mission-critical aerospace and rail systems - not achievable with standard SMB/SMC packages.
Availability
MPLAD36KP30A is available at Aetrix Electronics and suitable for aircraft power distribution, automotive engine control, and industrial UPS applications requiring stable component supply, long-term lifecycle support, and certified surge immunity.
Supply support for MPLAD36KP30A 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, RF, and timing solutions for aerospace, defense, and industrial markets.
The MPLAD36KP30A belongs to Microsemi's PLAD-series high-power TVS family, engineered specifically for multi-stroke lightning protection in safety-critical platforms where standard TVS diodes fail under repeated surge stress.
FAQ
What is the clamping voltage of MPLAD36KP30A at its rated peak pulse current?
The MPLAD36KP30A has a maximum clamping voltage (VC) of 48.8 V at its peak pulse current (IPP) of 738 A under 10/1000 μs waveform conditions. This value ensures downstream circuitry remains within safe operating voltage limits during worst-case surge events, and is measured with case temperature controlled per specification.
Is MPLAD36KP30A RoHS compliant and what plating does it use?
Yes, MPLAD36KP30A is RoHS compliant (designated by e3 suffix) and uses annealed matte-tin plating on terminals, fully solderable per MIL-STD-750 Method 2026. The tin plating ensures compatibility with lead-free reflow profiles and eliminates concerns about tin whisker growth in high-reliability deployments.
How does MPLAD36KP30A differ from bidirectional variants like MPLAD36KP30CA?
The MPLAD36KP30A is unidirectional with cathode on the metal base, intended for DC line protection where polarity is fixed. In contrast, MPLAD36KP30CA is bidirectional - symmetric clamping for AC or floating lines - and shares identical PPP, VWM, and thermal specs but differs in breakdown symmetry and marking. Both use the same PLAD package and footprint.
Can MPLAD36KP30A be used without a heatsink in a standard FR4 PCB layout?
Yes - when mounted on FR4 with the recommended pad layout (per datasheet page 6), MPLAD36KP30A achieves sufficient thermal dissipation for single-pulse or low-duty-cycle operation. Its 1.0 °C/W RθJC and metal-base construction allow direct conduction to large copper pours, eliminating need for discrete heatsinks in most aerospace and automotive implementations.
Which industry standards does MPLAD36KP30A meet for lightning protection?
MPLAD36KP30A meets RTCA DO-160F Section 22 (multi-stroke lightning), IEC 61000-4-5 (Class 1–5 with 2/12/42 Ω source impedance), and IEC 61000-4-2/4-4 (ESD/EFT). It is explicitly listed for Level 4 pin injection (Waveform 4) and Level 4 Waveform 5A per MicroNote 132, confirming validated performance across aviation and industrial surge test regimes.
MPLAD36KP30A 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):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.8V
- Current - Peak Pulse (10/1000µs):
- 738A
- 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
MPLAD36KP30A FAQ
1.How can I place an order for MPLAD36KP30A through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD36KP30A 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 MPLAD36KP30A reliable?
The price and inventory of MPLAD36KP30A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD36KP30A is usually 5 days.
3.What payment methods are accepted for MPLAD36KP30A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD36KP30A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD36KP30A?
MPLAD36KP30A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD36KP30A 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 MPLAD36KP30A?
For technical support, including MPLAD36KP30A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD36KP30A requirements.
6.How does Aetrix verify that MPLAD36KP30A is sourced from the original manufacturer or authorized distributors?
All MPLAD36KP30A 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 MPLAD36KP30A meets industry standards.
7.What is the process for return or replacement of MPLAD36KP30A?
All MPLAD36KP30A units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD36KP30A, 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 MPLAD36KP30A part is unused and in its original packaging.
Return procedure for MPLAD36KP30A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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