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Microchip Technology MPLAD36KP58A/TR
- Part No.:
- MPLAD36KP58A/TR
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD36KP58A/TR.pdf
- Description:
- SURFACE MOUNT 36,000 WATT, TVS,
- Quantity:
- Payment:
- Shipping:
Inventory:5,612
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Product details
Overview
MPLAD36KP58A/TR from Microsemi (now Microchip) is a unidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace, automotive, and industrial power rails. It delivers 36,000 W peak pulse power at 10/1000 μs, clamps transients to ≤93.6 V at 385 A, and features a 58 V working standoff voltage with <100 ps response time.
For engineers reviewing the MPLAD36KP58A/TR datasheet, MPLAD36KP58A/TR pinout, MPLAD36KP58A/TR application, or MPLAD36KP58A/TR equivalent, key selection criteria include its DO-160 Section 22 multi-stroke lightning compliance, 1.0 °C/W junction-to-case thermal resistance, RoHS-compliant matte-tin terminals, and suitability for 28 V and 42 V DC bus protection in avionics and vehicle ECUs.
Technical Context
This TVS diode operates in avalanche breakdown mode to clamp overvoltage transients before downstream circuitry sustains damage. Its low RθJC (1.0 °C/W) enables effective heat transfer to an external heatsink, supporting sustained surge handling under repeated lightning strike conditions per RTCA DO-160G Waveform 4 and IEC 61000-4-5.
The device exhibits a temperature coefficient of breakdown voltage (αVBR) of +70 mV/°C and maintains stable clamping performance across –55 °C to +150 °C junction temperature range. Its unidirectional polarity and metal-base cathode configuration require correct PCB orientation during placement to ensure proper reverse-bias operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 58 V - Maximum continuous DC or repetitive peak reverse voltage applied without conduction; matches 28 V system buses with 2× safety margin. |
| VBR @ IBR | 64.4–71.2 V @ 5 mA - Breakdown onset range ensures reliable triggering above normal operating voltage but below IC absolute maximum ratings. |
| VC @ IPP | 93.6 V @ 385 A - Clamping voltage during full-rated 10/1000 μs surge; limits stress on protected 100 V-rated MOSFETs or controllers. |
| IPP | 385 A - Peak impulse current capacity; supports Class 5 lightning protection per DO-160G Waveform 4 (6.4/69 μs) on short-distance lines. |
| RθJC | 1.0 °C/W - Enables direct thermal coupling to heatsink; allows >300 W steady-state dissipation at TC = 100 °C per derating curve. |
| Response Time | <100 ps - Ensures sub-nanosecond turn-on for fast-rising ESD and switching transients, preventing latch-up in sensitive analog front-ends. |
| αVBR | +70 mV/°C - Predictable positive drift supports thermal design margining in high-ambient environments like engine compartments. |
Pinout & Package
The MPLAD36KP58A/TR uses the PLAD (Power Leadless Array Device) package: a low-profile, thermally enhanced surface-mount outline with a metal base acting as the cathode terminal and primary heat path. Dimensions are 10.16 mm × 8.89 mm × 4.57 mm (L × W × H), with void-free UL94V-0 epoxy body and matte-tin-plated terminals compliant with MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Metal Base (Bottom) | Cathode | Primary current return path and thermal interface; must be soldered to large copper pour or heatsink for RθJC = 1.0 °C/W performance. |
| Top Surface Pad | Anode | Signal-side connection point; routed with minimal trace inductance to reduce clamping overshoot during fast transients. |
Key Features
| Feature | Design Value |
|---|---|
| 36 kW Peak Pulse Power | Enables single-device protection against multi-stroke lightning events per RTCA DO-160 Section 22 without cascaded TVS stages. |
| AEC-Q101 Qualified | Validated for automotive under-hood applications including alternator load dump (ISO 7637-2 Pulse 5a/b) and battery reverse polarity tolerance. |
| Moisture Sensitivity Level 1 | Eliminates dry-pack requirement and bake-out prior to reflow, reducing manufacturing cost and handling risk per IPC/JEDEC J-STD-020D.1. |
| Wafer & Assembly Lot Traceability | Supports full supply chain auditability for aerospace programs requiring AS9100-compliant component pedigree documentation. |
| RoHS-Compliant Matte-Tin Plating | Ensures reliable solder wetting and intermetallic formation during lead-free reflow (TSP = 260 °C, 10 s), compatible with standard SMT processes. |
Applications
| Aircraft Avionics Power Bus Protection | Automotive Engine Control Unit (ECU) Input Stage |
|---|---|
Use Scenario: Protecting 28 V DC distribution networks in flight control computers and sensor interfaces from induced lightning currents per DO-160G Section 22. IC Role / Device Role / Timing Role: Primary clamping element placed directly at board edge connector, shunting surge energy to chassis ground before it reaches DC-DC converters and FPGAs. Use Value: Withstands ≥50 multi-stroke lightning pulses at 385 A without degradation, meeting Class 5 requirements for short-distance pin injection (Waveform 4). | Use Scenario: Safeguarding 12 V/24 V power inputs of diesel engine ECUs against alternator load dump transients (ISO 7637-2 Pulse 5b) and jump-start surges. IC Role / Device Role / Timing Role: Unidirectional TVS mounted upstream of input filter capacitors and LDO regulators to clamp voltage spikes before they propagate into microcontroller power domains. Use Value: Clamps 120 V transients to ≤93.6 V within 100 ps, preventing brownout resets and gate oxide damage in 5 V logic-level drivers. |
| Industrial Motor Drive DC Link Protection | Railway Signaling Power Interface |
Use Scenario: Shielding 400 V DC link monitoring circuits in variable-frequency drives from IGBT switching-induced voltage spikes and capacitor bank discharge transients. IC Role / Device Role / Timing Role: High-power TVS placed across DC link sense resistors and isolation amplifiers to absorb 36 kW surges without thermal runaway. Use Value: Junction-to-case thermal resistance of 1.0 °C/W allows direct mounting to aluminum heatsink, sustaining 500+ surge cycles at 100 ms intervals without derating. | Use Scenario: Securing 72 V nominal signaling power supplies in trackside electronic interlocking systems against traction current coupling and lightning-induced ground potential rise. IC Role / Device Role / Timing Role: Bidirectional-capable variant (MPLAD36KP58CA/TR) used in differential pair protection; this unidirectional version deployed on positive rail only with chassis-ground referenced cathode. Use Value: Complies with EN 50121-3-2 for railway EMC immunity, clamping 4 kV/2 Ω surges to <95 V while maintaining <10 µA leakage at 58 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 |
|---|---|---|---|
| SMBJ58A/TR | Lower peak power (600 W), smaller SMB package, higher RθJA (110 °C/W), no AEC-Q101 qualification. | Suitable for consumer-grade 24 V IoT nodes; insufficient for DO-160G multi-stroke or automotive load dump. | Select SMBJ58A/TR only for cost-sensitive, low-surge-risk applications where thermal management is passive and duty cycle is <0.01%. |
| SMCJ58A/TR | 1500 W peak power, SMC package, RθJC = 2.5 °C/W, AEC-Q101 qualified, but not DO-160G tested. | Valid for ISO 7637-2 Pulse 5a/b in passenger vehicles; lacks documented multi-stroke endurance for aviation use. | Choose SMCJ58A/TR when automotive qualification is mandatory but aircraft certification is not required, and heatsink area is limited. |
Compared with SMBJ58A/TR and SMCJ58A/TR, the MPLAD36KP58A/TR provides 24× higher surge power handling, 2.5× lower thermal resistance, and formal DO-160G Section 22 validation-making it the only option for certified avionics and heavy-duty industrial DC bus protection where single-event energy exceeds 100 J.
Availability
MPLAD36KP58A/TR is available at Aetrix Electronics and suitable for aircraft avionics, automotive ECU, and industrial motor drive applications requiring stable component supply, long-term lifecycle support, and traceable sourcing for safety-critical designs.
Supply support for MPLAD36KP58A/TR 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 (acquired by Microchip Technology in 2018) is a U.S.-based semiconductor company specializing in high-reliability analog, mixed-signal, and power management solutions for aerospace, defense, and industrial markets.
The MPLAD36KP series belongs to Microsemi's high-power transient suppression product line, engineered specifically for mission-critical surge protection in environments subject to lightning, load dump, and EFT events where failure is not an option.
FAQ
What is the clamping voltage of the MPLAD36KP58A/TR at its rated peak pulse current?
The MPLAD36KP58A/TR has a maximum clamping voltage (VC) of 93.6 V at its rated peak pulse current (IPP) of 385 A under the 10/1000 μs waveform. This value is measured across the device terminals during standardized surge testing and defines the upper voltage limit imposed on protected circuitry during worst-case transients. The MPLAD36KP58A/TR maintains this clamping performance across its full operating temperature range.
Does the MPLAD36KP58A/TR require a heatsink for reliable operation?
Yes-the MPLAD36KP58A/TR relies on thermal conduction through its metal base cathode to maintain safe junction temperatures during repeated surges. Its specified RθJC of 1.0 °C/W assumes direct mounting to a heatsink or large copper plane. Without external thermal management, the device may exceed its 150 °C maximum junction temperature after just one 36 kW pulse. Aetrix recommends using the manufacturer's pad layout and attaching the PLAD base to ≥25 cm² of 2 oz copper for optimal thermal performance.
Is the MPLAD36KP58A/TR compliant with automotive standards?
Yes-the MPLAD36KP58A/TR is AEC-Q101 qualified and validated for automotive applications including ISO 7637-2 Pulse 5a/b (load dump) and IEC 61000-4-4 (EFT). Its construction, wafer lot traceability, and surge testing meet the reliability requirements for under-hood engine control modules and battery management systems. However, it is not qualified to ISO 16750-2 for mechanical vibration or extended temperature cycling beyond its specified –55 °C to +150 °C range.
How does the MPLAD36KP58A/TR differ from bidirectional TVS diodes like MPLAD36KP58CA/TR?
The MPLAD36KP58A/TR is unidirectional and conducts only during reverse-bias overvoltage events, making it ideal for DC power rail protection where polarity is fixed. In contrast, MPLAD36KP58CA/TR is bidirectional and protects both positive and negative transients-required for AC lines or differential signaling. Their clamping voltages and surge ratings are identical, but the unidirectional version offers lower capacitance and faster response (<100 ps vs. <5 ns), critical for high-speed data line protection.
Can the MPLAD36KP58A/TR be used in parallel for higher current handling?
No-parallel operation of MPLAD36KP58A/TR devices is not recommended due to mismatched dynamic impedance and avalanche turn-on characteristics, which cause current imbalance and premature failure of one unit. For higher surge current capability, select a higher-voltage rating (e.g., MPLAD36KP70A/TR) with lower IPP but same PPP, or use a single higher-power device such as the MPLAD50KP58A/TR. Derating curves and surge lifetime data assume single-device operation.
MPLAD36KP58A/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- Nonstandard SMD
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 58V
- Voltage - Breakdown (Min):
- 64.4V
- Voltage - Clamping (Max) @ Ipp:
- 93.6V
- Current - Peak Pulse (10/1000µs):
- 385A
- Power - Peak Pulse:
- 36000W (36kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Military
- Qualification:
- MIL-PRF-19500
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PLAD
MPLAD36KP58A/TR FAQ
1.How can I place an order for MPLAD36KP58A/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD36KP58A/TR 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 MPLAD36KP58A/TR reliable?
The price and inventory of MPLAD36KP58A/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD36KP58A/TR is usually 5 days.
3.What payment methods are accepted for MPLAD36KP58A/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD36KP58A/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD36KP58A/TR?
MPLAD36KP58A/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD36KP58A/TR 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 MPLAD36KP58A/TR?
For technical support, including MPLAD36KP58A/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD36KP58A/TR requirements.
6.How does Aetrix verify that MPLAD36KP58A/TR is sourced from the original manufacturer or authorized distributors?
All MPLAD36KP58A/TR 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 MPLAD36KP58A/TR meets industry standards.
7.What is the process for return or replacement of MPLAD36KP58A/TR?
All MPLAD36KP58A/TR units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD36KP58A/TR, 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 MPLAD36KP58A/TR part is unused and in its original packaging.
Return procedure for MPLAD36KP58A/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD36KP58A/TR Tags
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