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Microchip Technology MAPLAD36KP220A
- Part No.:
- MAPLAD36KP220A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD36KP220A.pdf
- Description:
- TVS DIODE 220VWM 356VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:8,347
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Product details
Overview
MAPLAD36KP220A 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, clamps transients to ≤356 V at 100 A, and features a 220 V reverse standoff voltage (VWM) with 245–271 V breakdown range. It is qualified to AEC-Q101 and meets RTCA DO-160 Section 22 multi-stroke lightning requirements.
For engineers reviewing the MAPLAD36KP220A datasheet, MAPLAD36KP220A pinout, MAPLAD36KP220A application, or MAPLAD36KP220A equivalent, key selection criteria include its 220 V VWM rating, 356 V max clamping voltage at 100 A, 1.0 °C/W junction-to-case thermal resistance, RoHS-compliant e3 plating, and suitability for secondary lightning protection per IEC 61000-4-5 with 42 Ω source impedance (Class 1–5).
Technical Context
The MAPLAD36KP220A employs an avalanche diode structure optimized for low clamping ratio and minimal thermal resistance. Its metal-base package enables direct heatsinking, supporting continuous operation under repetitive surges at ≤0.05% duty factor when mounted on FR4 with recommended pad layout.
It is rated for junction temperatures from –55 °C to +150 °C and exhibits a temperature coefficient of breakdown voltage (αV(BR)) of +269 mV/°C. Standby current ID is ≤10 μA at 220 V VWM, and it passes full surge testing per IEC 61000-4-2 (ESD), -4-4 (EFT), and -4-5 (lightning), including pin injection per RTCA/DO-160F Waveform 4 (Level 4 up to 400 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 36,000 W @ 10/1000 μs - sustains aircraft-grade lightning transients without failure |
| Reverse Standoff Voltage (VWM) | 220 V - maximum continuous operating voltage before clamping initiates |
| Clamping Voltage (VC) | ≤356 V @ 100 A - limits downstream circuit voltage during surge events |
| Breakdown Voltage (V(BR)) | 245–271 V @ 5 mA - defines precise avalanche onset threshold |
| Junction-to-Case Thermal Resistance | 1.0 °C/W - enables efficient heat transfer to PCB copper or external heatsink |
| Standby Current (ID) | ≤10 μA @ 220 V - ensures negligible leakage in standby power systems |
| Temperature Coefficient (αV(BR)) | +269 mV/°C - quantifies V(BR) drift over operating temperature range |
Pinout & Package
MAPLAD36KP220A uses a surface-mount PLAD package with a metal base acting as the cathode terminal. The device has two terminals: anode (top metallization) and cathode (exposed metal bottom). Mounting requires thermal pad layout per datasheet Figure "PAD LAYOUT" (A = 0.470", B = 0.230", C = 0.100") for optimal thermal performance and mechanical reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive surge input node | Connected to protected line (e.g., 28 V aircraft bus); conducts during reverse-biased surge |
| Cathode (metal base) | Reference/ground return path | Must be soldered to large copper pour or heatsink; serves as primary thermal conduction path |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMT construction | Height ≤ 0.210" (5.33 mm) - fits constrained avionics enclosures without height interference |
| AEC-Q101 qualification | Validated for automotive powertrain and body electronics - supports dual-use aerospace/automotive programs |
| RTCA DO-160F Waveform 4 compliance | Level 4 protection up to 400 V - certified for pin-injection lightning immunity in flight-critical systems |
| MIL-PRF-19500 upscreening option | Available M/MA/MXL reliability levels - enables use in Class H military and space applications |
| RoHS-compliant e3 plating | Matte-tin termination - ensures lead-free assembly compatibility and long-term solder joint integrity |
Applications
| Aerospace Power Distribution | Automotive Load Dump Protection |
|---|---|
|
Use Scenario: 28 V DC distribution bus in commercial aircraft, exposed to lightning-induced transients per RTCA DO-160 Section 22. IC Role / Device Role / Timing Role: Primary transient suppression device placed at bus entry point to clamp multi-stroke surges. Use Value: Enables compliance with Level 4 pin injection (Waveform 4) and Class 5 secondary lightning (42 Ω source) without derating. |
Use Scenario: 12 V/24 V alternator output line in heavy-duty trucks experiencing ISO 7637-2 Load Dump pulses. IC Role / Device Role / Timing Role: High-power TVS shunting 120 V/400 ms transients away from engine control unit (ECU) inputs. Use Value: Withstands 36 kW surges while maintaining <356 V clamping - protects sensitive CAN/LIN transceivers downstream. |
| Industrial Motor Drive DC Bus | Railway Traction Control Interface |
|
Use Scenario: DC link protection in variable-frequency drives where IGBT switching induces high dV/dt transients. IC Role / Device Role / Timing Role: Fast-response clamping device across DC+ and DC− rails to limit voltage overshoot during regeneration. Use Value: Sub-100 ps response time and 1.0 °C/W RθJC enable reliable operation under repetitive 0.05% duty cycle surges. |
Use Scenario: Signal/power interface between onboard traction controller and track-side signaling equipment subject to induced surges. IC Role / Device Role / Timing Role: Secondary protection stage after gas discharge tube (GDT), handling residual energy per IEC 61000-4-5 (42 Ω, Class 3). Use Value: 220 V VWM matches nominal 110 V AC-derived control rail; 356 V VC ensures safe margin below 400 V insulation rating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ220A | Lower PPP (400 W), DO-214AC package, RθJA = 40 °C/W, no AEC-Q101 or DO-160 certification | Consumer/industrial grade only; unsuitable for aviation or automotive safety-critical use | Select when cost sensitivity outweighs reliability and compliance requirements |
| Vishay SM8S220A | Higher PPP (6600 W), same DO-214AB footprint but lower thermal performance (RθJC = 2.5 °C/W), no MIL-PRF-19500 screening | Acceptable for non-certified automotive modules; lacks DO-160F Waveform 4 validation | Choose for volume automotive ECUs where full aerospace qualification is unnecessary |
Compared with SMAJ220A and SM8S220A, the MAPLAD36KP220A provides 9× higher peak power handling, certified DO-160F compliance, and 2.5× better thermal resistance - making it the only viable option for certified aerospace platforms and high-reliability automotive power systems.
Availability
MAPLAD36KP220A is available at Aetrix Electronics and suitable for aerospace power distribution, automotive load dump protection, industrial motor drive DC bus protection, and railway traction control interface applications requiring stable component supply across extended product lifecycles.
Supply support for MAPLAD36KP220A 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, mixed-signal, and radiation-hardened ICs for aerospace, defense, and industrial markets.
The MAPLAD36KP220A belongs to Microsemi's high-power PLAD TVS family, engineered specifically for certified lightning and load-dump protection in safety-critical avionics and automotive systems.
FAQ
What is the clamping voltage of MAPLAD36KP220A at its rated peak pulse current?
The MAPLAD36KP220A has a maximum clamping voltage (VC) of 356 V at 100 A peak pulse current 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 circuits during surge events. The MAPLAD36KP220A maintains this clamping performance across its full operating temperature range when properly mounted.
Is MAPLAD36KP220A qualified for automotive applications?
Yes, MAPLAD36KP220A is fully qualified to AEC-Q101 for stress testing including HTGB, HTRB, and temperature cycling. It is designed for automotive load dump protection in 24 V systems and supports ISO 7637-2 compliance when used with appropriate front-end filtering. The MAPLAD36KP220A also offers optional MIL-PRF-19500 screening for enhanced reliability in mission-critical vehicle subsystems.
Does MAPLAD36KP220A meet RTCA DO-160 lightning standards?
Yes, MAPLAD36KP220A is explicitly validated for RTCA DO-160 Section 22 multi-stroke lightning testing and pin injection per Waveform 4 (6.4/69 μs) at Level 4 up to 400 V. The MAPLAD36KP220A achieves this through its low-inductance metal-base construction and optimized avalanche dynamics, enabling compliance without external snubbing components.
What is the thermal resistance specification for MAPLAD36KP220A?
The MAPLAD36KP220A has a junction-to-case thermal resistance (RθJC) of 1.0 °C/W when mounted per the recommended pad layout on FR4. This value is confirmed in the "MAXIMUM RATINGS" table of RF01216 Rev B and enables effective heat dissipation into PCB copper or external heatsinks. The MAPLAD36KP220A's RθJC is 2.5× lower than standard SMB/SMA packages, critical for repetitive surge duty cycles.
How does the polarity marking work on MAPLAD36KP220A?
The MAPLAD36KP220A is unidirectional, with the cathode located on the exposed metal base (bottom side) and the anode on the top metallized surface. Polarity is marked by a band on the top surface indicating cathode - consistent with standard diode convention. This configuration ensures correct orientation during placement, as reversing the MAPLAD36KP220A would prevent proper clamping function.
MAPLAD36KP220A 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):
- 220V
- Voltage - Breakdown (Min):
- 245V
- Voltage - Clamping (Max) @ Ipp:
- 356V
- Current - Peak Pulse (10/1000µs):
- 102A
- 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
MAPLAD36KP220A FAQ
1.How can I place an order for MAPLAD36KP220A through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD36KP220A 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 MAPLAD36KP220A reliable?
The price and inventory of MAPLAD36KP220A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD36KP220A is usually 5 days.
3.What payment methods are accepted for MAPLAD36KP220A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD36KP220A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD36KP220A?
MAPLAD36KP220A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD36KP220A 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 MAPLAD36KP220A?
For technical support, including MAPLAD36KP220A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD36KP220A requirements.
6.How does Aetrix verify that MAPLAD36KP220A is sourced from the original manufacturer or authorized distributors?
All MAPLAD36KP220A 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 MAPLAD36KP220A meets industry standards.
7.What is the process for return or replacement of MAPLAD36KP220A?
All MAPLAD36KP220A units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD36KP220A, 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 MAPLAD36KP220A part is unused and in its original packaging.
Return procedure for MAPLAD36KP220A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD36KP220A Tags
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