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Microchip Technology MAPLAD36KP75A
- Part No.:
- MAPLAD36KP75A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD36KP75A.pdf
- Description:
- TVS DIODE 75VWM 121VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:7,270
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Product details
Overview
MAPLAD36KP75A 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 kW peak pulse power at 10/1000 μs, clamps at ≤121 V under 298 A peak impulse current, and features a 75 V reverse standoff voltage (VWM) with 83.3–92.1 V breakdown range. It is qualified to AEC-Q101 and meets RTCA DO-160 Section 22 multi-stroke lightning requirements.
For engineers reviewing the MAPLAD36KP75A datasheet, MAPLAD36KP75A pinout, MAPLAD36KP75A application, or MAPLAD36KP75A equivalent, this device is selected for primary and secondary lightning protection in avionics power rails, load-dump suppression in 24 V vehicle electronics, and ESD/EFT hardening per IEC 61000-4-2/4-4 where low thermal resistance and high reliability are critical.
Technical Context
The MAPLAD36KP75A uses an avalanche diode structure optimized for fast response (<100 ps rise time) and low clamping ratio (VC/V(BR) ≈ 1.33). Its metal-base package provides direct thermal path to PCB copper, achieving 1.0 °C/W junction-to-case thermal resistance when mounted on FR4 with recommended pad layout.
It operates across –55 °C to +150 °C junction temperature, supports steady-state dissipation up to 71 W at TC = 100 °C, and maintains <10 μA standby current at 75 V. Surge testing follows IEC 61000-4-5 (2/12/42 Ω source impedance) and RTCA DO-160F Waveform 4 & 5A for pin-injection immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 36,000 W @ 10/1000 μs - sustains full-rated surge energy without degradation in single-event or low-duty-cycle applications |
| Reverse Standoff Voltage (VWM) | 75 V - maximum continuous DC or peak AC voltage the device blocks without conduction |
| Breakdown Voltage (V(BR)) | 83.3–92.1 V @ 5 mA - ensures reliable avalanche initiation above operating rail, preventing premature clamping |
| Max Clamping Voltage (VC) | 121 V @ 298 A - limits downstream voltage stress during worst-case transients to safe levels for 75 V-rated circuitry |
| Junction-to-Case Thermal Resistance | 1.0 °C/W - enables effective heat transfer to heatsink or copper pour, critical for repeated surge duty |
| Standby Current (ID) | <10 μA @ 75 V - negligible leakage in standby, preserving battery life and signal integrity |
| Temperature Range | –55 °C to +150 °C - validated operation across extended industrial and aerospace environmental envelopes |
Pinout & Package
MAPLAD36KP75A uses the PLAD surface-mount package: void-free UL94V-0 epoxy body with tin-lead or RoHS-compliant matte-tin plating. Cathode is the metal base (bottom side); anode is top-side metallization. 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 metallization) | Transient current entry point for unidirectional clamping | Connected to protected line; conducts surge current toward cathode during overvoltage events |
| Cathode (metal base) | Transient current return path and thermal interface | Mounted directly to PCB copper pour or heatsink; serves dual role as electrical terminal and primary heat sink |
Key Features
| Feature | Design Value |
|---|---|
| Avalanche-diode architecture | Enables sub-100 ps response and precise, repeatable clamping without degradation over >1000 surges |
| Low RθJC (1.0 °C/W) | Permits sustained surge handling without thermal runaway when mounted per recommended pad layout |
| RTCA DO-160F Waveform 4 & 5A compliance | Validated for Level 4/5 pin-injection protection in aircraft avionics, eliminating need for external filtering stages |
| AEC-Q101 qualification | Confirms robustness for automotive 12/24 V systems including load dump, jump start, and alternator ripple |
| MIL-PRF-19500 upscreening options | Supports high-reliability programs requiring M, MA, MX, or MXL screening levels with full lot traceability |
Applications
| Avionics Power Rail Protection | Automotive Load Dump Suppression |
|---|---|
|
Use Scenario: Protecting 28 V DC distribution buses in commercial aircraft against multi-stroke lightning-induced transients per RTCA DO-160 Section 22. IC Role / Device Role / Timing Role: Primary clamping device placed at bus entry point; absorbs >36 kW surges within nanoseconds. Use Value: Eliminates need for cascaded TVS stages while maintaining compliance with Class 5 lightning test requirements at short and long distances. |
Use Scenario: Safeguarding engine control units (ECUs) and infotainment modules during 12 V system load dump events (ISO 7637-2 Pulse 5a/b). IC Role / Device Role / Timing Role: Unidirectional TVS connected between battery rail and ground; clamps transients up to 121 V before downstream ICs experience overstress. Use Value: Withstands 298 A peak current at 75 V standoff, enabling single-device protection without derating or parallel staging. |
| Industrial Motor Drive DC Link | Renewable Energy Inverter Input |
|
Use Scenario: Shielding IGBT gate drivers and sensing circuits in variable-frequency drives from switching-induced voltage spikes and RFI coupling. IC Role / Device Role / Timing Role: Fast-response TVS placed at DC link input; suppresses transients generated by rapid IGBT turn-off. Use Value: Sub-100 ps response and 121 V clamping limit voltage overshoot below 150 V rating of common gate driver ICs. |
Use Scenario: Protecting photovoltaic string inverters from grid-side surges and induced lightning currents in solar farm installations. IC Role / Device Role / Timing Role: Secondary lightning protector per IEC 61000-4-5 (42 Ω source) on DC input stage upstream of MPPT controller. Use Value: Rated for Class 1–5 protection with 75 V VWM, matching typical PV open-circuit voltages while delivering 36 kW surge capacity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ75A | Lower PPP (400 W), smaller SMA package, 1.5x higher clamping ratio (VC/V(BR) ≈ 1.5) | Suitable only for low-energy transients; not rated for RTCA DO-160 or IEC 61000-4-5 Class 4/5 | Select when cost and board space constrain requirements and surge energy remains below 500 W. |
| Vishay VMM750 | Same 75 V VWM, but 5 kW PPP rating and TO-277 package; no AEC-Q101 or DO-160 qualification data published | Limited to industrial-grade surge suppression; lacks aerospace/automotive certification documentation | Choose only for non-safety-critical, non-certified applications where 36 kW capability is unnecessary. |
Compared with SMAJ75A and VMM750, MAPLAD36KP75A delivers 90× higher peak power, certified compliance with aviation and automotive surge standards, and a thermally optimized metal-base package-making it the sole option for mission-critical, high-energy transient environments.
Availability
MAPLAD36KP75A is available at Aetrix Electronics and suitable for avionics power distribution, automotive ECU protection, and renewable energy inverter design requiring stable component supply across extended product lifecycles.
Supply support for MAPLAD36KP75A 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, RF, and timing solutions for aerospace, defense, and industrial markets.
The MAPLAD36KP75A belongs to Microsemi's PLAD-series high-power TVS family, engineered specifically for certified lightning and load-dump protection in safety-critical systems where thermal performance and surge repeatability are paramount.
FAQ
What is the clamping voltage of MAPLAD36KP75A at its rated peak pulse current?
The MAPLAD36KP75A has a maximum clamping voltage (VC) of 121 V at 298 A peak pulse current (IPP), measured under standard 10/1000 μs waveform conditions. This value ensures protected circuits remain below critical voltage thresholds during worst-case transients. The clamping behavior is consistent across its operating temperature range and is verified per IEC 61000-4-5 test protocols. MAPLAD36KP75A maintains this performance without parameter shift after repeated surge events.
Is MAPLAD36KP75A qualified for automotive applications?
Yes, MAPLAD36KP75A is AEC-Q101 qualified for use in automotive electronics. It is specifically designed to withstand load dump pulses (ISO 7637-2 Pulse 5a/b), jump-start transients, and alternator ripple in 12 V and 24 V systems. Its 75 V standoff voltage aligns with nominal 24 V vehicle architectures, and its 36 kW surge rating exceeds typical automotive surge requirements. MAPLAD36KP75A also supports optional MIL-PRF-19500 screening for enhanced reliability in safety-critical modules.
How does the PLAD package of MAPLAD36KP75A improve thermal performance?
The PLAD package of MAPLAD36KP75A uses a metal base as the cathode terminal, providing a direct thermal conduction path from the silicon die to the PCB copper pour or external heatsink. With a measured junction-to-case thermal resistance of 1.0 °C/W, it achieves significantly lower thermal impedance than standard SMD packages like SMA or SMB. This allows MAPLAD36KP75A to dissipate high-energy surges repeatedly without thermal runaway when mounted per the specified pad layout. MAPLAD36KP75A's thermal design eliminates the need for additional thermal vias or complex heatsinking in most applications.
Does MAPLAD36KP75A meet RTCA DO-160 lightning protection requirements?
Yes, MAPLAD36KP75A is explicitly validated for RTCA DO-160 Section 22 multi-stroke lightning testing. It meets Level 4 and Level 5 pin-injection requirements for Waveform 4 (6.4/69 μs) and Waveform 5A (40/120 μs) at 25 °C, and supports temperature-derated operation per MicroNote 132. Its 36 kW rating and low clamping voltage enable compliance with both short- and long-distance lightning test configurations defined in DO-160F. MAPLAD36KP75A is widely deployed in certified avionics power supplies and flight control interfaces.
What is the polarity configuration and marking convention for MAPLAD36KP75A?
MAPLAD36KP75A is a unidirectional TVS diode. Its cathode is the metal base (bottom side of the package), and the anode is the top-side metallization. Polarity is marked on the body with a band or symbol indicating cathode orientation. When mounted on PCB, the metal base must be soldered to a large copper area serving as both electrical return and thermal path. MAPLAD36KP75A does not include "CA" suffix - that denotes bidirectional variants (e.g., MAPLAD36KP75CA). The absence of "CA" confirms its unidirectional functionality.
MAPLAD36KP75A 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):
- 75V
- Voltage - Breakdown (Min):
- 83.3V
- Voltage - Clamping (Max) @ Ipp:
- 121V
- Current - Peak Pulse (10/1000µs):
- 298A
- 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
MAPLAD36KP75A FAQ
1.How can I place an order for MAPLAD36KP75A through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD36KP75A 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 MAPLAD36KP75A reliable?
The price and inventory of MAPLAD36KP75A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD36KP75A is usually 5 days.
3.What payment methods are accepted for MAPLAD36KP75A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD36KP75A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD36KP75A?
MAPLAD36KP75A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD36KP75A 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 MAPLAD36KP75A?
For technical support, including MAPLAD36KP75A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD36KP75A requirements.
6.How does Aetrix verify that MAPLAD36KP75A is sourced from the original manufacturer or authorized distributors?
All MAPLAD36KP75A 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 MAPLAD36KP75A meets industry standards.
7.What is the process for return or replacement of MAPLAD36KP75A?
All MAPLAD36KP75A units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD36KP75A, 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 MAPLAD36KP75A part is unused and in its original packaging.
Return procedure for MAPLAD36KP75A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD36KP75A Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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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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Toshiba Semiconductor and Storage
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