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Microchip Technology MXPLAD36KP40A
- Part No.:
- MXPLAD36KP40A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MXPLAD36KP40A.pdf
- Description:
- TVS DIODE 40VWM 64.5VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:5,800
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Product details
Overview
MXPLAD36KP40A from Microsemi is a unidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace and automotive systems. It delivers 36,000 W peak pulse power at 10/1000 μs, clamps at ≤64.5 V under 559 A peak impulse current, and features 40 V reverse standoff voltage with 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 MXPLAD36KP40A datasheet, MXPLAD36KP40A pinout, MXPLAD36KP40A application, or MXPLAD36KP40A equivalent, key selection criteria include its 40 V VWM rating, low-profile PLAD package with metal-base cathode, verified multi-stroke lightning compliance, and AEC-Q101 qualification for automotive load dump protection.
Technical Context
The MXPLAD36KP40A operates as a silicon avalanche diode-based TVS, leveraging controlled breakdown at 44.4–49.1 V to limit transient overvoltages. Its metal-base thermal path achieves 1.0 °C/W RθJC, supporting high-repetition surges when mounted on FR4 with recommended pad layout.
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 variants, with derated performance above 25°C per Figure 3. Standby current ID is ≤10 μA at 40 V, and clamping response time is <100 ps.
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) | 40 V - matches nominal 36 V automotive systems and 28 V avionics rails |
| Clamping Voltage (VC) | 64.5 V max @ 559 A - ensures downstream ICs remain below absolute maximum ratings during surge |
| Junction-to-Case Thermal Resistance | 1.0 °C/W - enables direct heat sinking via metal base for high-duty-cycle operation |
| Standby Current (ID) | ≤10 μA @ 40 V - negligible leakage in always-on vehicle subsystems |
| Breakdown Voltage (V(BR)) | 44.4–49.1 V @ 5 mA - precise avalanche onset for repeatable clamping behavior |
| Temperature Coefficient | +44 mV/°C - predictable V(BR) drift across -55°C to +150°C operating range |
Pinout & Package
MXPLAD36KP40A uses the PLAD surface-mount package: void-free UL94V-0 epoxy body (12.32 × 10.54 × 5.08 mm), matte-tin plated terminals, and cathode on the metal base (underside). Polarity marking appears only on unidirectional versions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (top surface) | Transient current entry point | Connected to protected line; requires PCB trace capable of 559 A surge current |
| Cathode (metal base) | Transient current return path | Must be soldered to large copper thermal pad for 1.0 °C/W RθJC performance |
Key Features
| Feature | Design Value |
|---|---|
| 36 kW surge rating | Validated for multi-stroke lightning per RTCA DO-160 Section 22 - eliminates need for external spark gaps in avionics |
| Metal-base thermal design | Enables 71 W steady-state dissipation at TC = 100°C - supports continuous ESD/EFT protection in hot environments |
| AEC-Q101 qualified | Guarantees reliability for automotive load dump (ISO 7637-2 Pulse 5a/b) without burn-in screening waivers |
| RoHS-compliant (e3) | Meets IPC/JEDEC J-STD-020B Level 1 moisture sensitivity - no dry pack required before reflow |
| Wafer-level lot traceability | Supports full traceability for DO-254/DO-178C certification in safety-critical flight control systems |
Applications
| Aerospace Avionics Power Input | Automotive Engine Control Unit (ECU) |
|---|---|
Use Scenario: Protecting 28 V DC power inputs of flight management computers against lightning-induced surges per RTCA DO-160F Section 22. IC Role / Device Role / Timing Role: Primary secondary surge suppression device placed directly at board edge connector. Use Value: Clamps transients to ≤64.5 V within 100 ps, preserving integrity of downstream DC/DC converters rated for 75 V max input. | Use Scenario: Safeguarding 12 V/24 V ECU power rails during alternator load dump events (ISO 7637-2 Pulse 5). IC Role / Device Role / Timing Role: High-energy TVS absorbing >300 J pulses without degradation over 100,000 cycles. Use Value: Eliminates need for series fusing or redundant TVS stacks due to 36 kW PPP rating and AEC-Q101 qualification. |
| Railway Signaling Interface | Industrial Motor Drive DC Bus |
Use Scenario: Shielding 48 V signaling lines in train control systems from induced surges during nearby lightning strikes. IC Role / Device Role / Timing Role: Bidirectional-capable variant used (MPLAD36KP40CA), but MXPLAD36KP40A serves same rail with polarity-aware layout. Use Value: Meets IEC 61000-4-5 Class 4 (42 Ω source) with 64.5 V clamping - keeps interface ICs within safe operating area. | Use Scenario: Protecting 400 V DC bus monitoring circuits in variable-frequency drives from switching transients. IC Role / Device Role / Timing Role: Standoff-rated TVS placed across isolated voltage sense inputs to prevent latch-up. Use Value: 40 V VWM aligns with sensor supply rails; 10 μA ID avoids measurement offset errors in precision analog front-ends. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ40A | 600 W PPP rating, SMB package, RθJA = 40 °C/W, no AEC-Q101 or DO-160 validation | Limited to single-stroke surges in consumer electronics; unsuitable for aviation or automotive qualification | Select only for cost-sensitive, non-certified 40 V rail protection where surge energy < 5 J |
| SMCJ40A | 1500 W PPP, SMC package, RθJC = 2.5 °C/W, AEC-Q101 qualified but not DO-160 tested | Acceptable for ISO 7637-2 Pulse 5 in passenger vehicles, but fails RTCA DO-160 multi-stroke requirements | Choose when DO-160 compliance is unnecessary and board space allows larger SMC footprint |
Compared with SMBJ40A and SMCJ40A, MXPLAD36KP40A provides 24× and 24× higher peak pulse power respectively, validated multi-stroke lightning endurance, and metal-base thermal performance essential for aerospace-grade reliability - making it irreplaceable in certified avionics and high-end automotive ECUs.
Availability
MXPLAD36KP40A is available at Aetrix Electronics and suitable for aerospace avionics, automotive engine control units, railway signaling interfaces, and industrial motor drive systems requiring stable component supply across extended product lifecycles.
Supply support for MXPLAD36KP40A 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) designs high-reliability semiconductor solutions for aerospace, defense, and industrial markets, with expertise in radiation-hardened ICs, timing devices, and power protection components.
The MPLAD family was engineered specifically for certified multi-stroke lightning protection in airborne systems, combining ultra-high PPP with thermal and reliability attributes demanded by RTCA DO-160 and MIL-PRF-19500 standards.
FAQ
What is the clamping voltage specification for MXPLAD36KP40A under peak surge conditions?
The MXPLAD36KP40A has a maximum clamping voltage (VC) of 64.5 V at 559 A peak pulse current (IPP) under 10/1000 μs waveform conditions. This value is measured per Figure 3 in the RF01216 datasheet and ensures protected circuitry remains within safe voltage limits during high-energy transients such as automotive load dump or aircraft lightning induction.
Does MXPLAD36KP40A meet AEC-Q101 qualification requirements for automotive use?
Yes, MXPLAD36KP40A is tested in accordance with AEC-Q101 requirements for discrete semiconductors. The device undergoes stress testing including temperature cycling, humidity bias, and surge endurance - confirming suitability for automotive engine control units and other under-hood applications subject to ISO 7637-2 Pulse 5 load dump events.
How does the thermal performance of MXPLAD36KP40A compare to standard SMB/SMC TVS diodes?
MXPLAD36KP40A achieves a junction-to-case thermal resistance (RθJC) of 1.0 °C/W - over 2× better than typical SMCJ40A (2.5 °C/W) and 4× better than SMBJ40A (4.0 °C/W). This is enabled by its metal-base PLAD package, allowing direct heat transfer to PCB copper pads and sustaining higher steady-state power (71 W at TC = 100°C) without derating.
Is MXPLAD36KP40A suitable for RTCA DO-160 Section 22 lightning protection?
Yes, MXPLAD36KP40A is explicitly validated for RTCA DO-160F Section 22 multi-stroke lightning testing. It meets Waveform 4 (6.4/69 μs) Level 4 and Waveform 5A (40/120 μs) Level 4 requirements, as confirmed in the RF01216 datasheet. Its 36 kW PPP rating and low clamping voltage ensure compliance without auxiliary protection stages.
What is the polarity configuration and mounting orientation requirement for MXPLAD36KP40A?
MXPLAD36KP40A is unidirectional, with the cathode located on the metal base (underside) and the anode on the top surface. Correct mounting requires soldering the metal base to a thermally optimized PCB pad per the specified pad layout (Ref. A=11.94 mm, B=5.85 mm). Polarity marking appears only on the top surface for identification.
MXPLAD36KP40A 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):
- 40V
- Voltage - Breakdown (Min):
- 44.4V
- Voltage - Clamping (Max) @ Ipp:
- 64.5V
- Current - Peak Pulse (10/1000µs):
- 559A
- 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
MXPLAD36KP40A FAQ
1.How can I place an order for MXPLAD36KP40A through Aetrix?
Please submit a Request for Quotation (RFQ) for MXPLAD36KP40A 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 MXPLAD36KP40A reliable?
The price and inventory of MXPLAD36KP40A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MXPLAD36KP40A is usually 5 days.
3.What payment methods are accepted for MXPLAD36KP40A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MXPLAD36KP40A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MXPLAD36KP40A?
MXPLAD36KP40A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MXPLAD36KP40A 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 MXPLAD36KP40A?
For technical support, including MXPLAD36KP40A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MXPLAD36KP40A requirements.
6.How does Aetrix verify that MXPLAD36KP40A is sourced from the original manufacturer or authorized distributors?
All MXPLAD36KP40A 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 MXPLAD36KP40A meets industry standards.
7.What is the process for return or replacement of MXPLAD36KP40A?
All MXPLAD36KP40A units undergo pre-shipment inspection (PSI). If there is an issue with MXPLAD36KP40A, 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 MXPLAD36KP40A part is unused and in its original packaging.
Return procedure for MXPLAD36KP40A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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