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Microchip Technology MAPLAD36KP20A
- Part No.:
- MAPLAD36KP20A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD36KP20A.pdf
- Description:
- TVS DIODE 20VWM 34VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:6,979
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Product details
Overview
MAPLAD36KP20A 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 kW peak pulse power at 10/1000 μs, clamps at ≤34.0 V @ 1059 A, and features a 20 V reverse standoff voltage (VWM), 22.2–24.5 V breakdown voltage (V(BR)), and 1.0 °C/W junction-to-case thermal resistance. It is qualified to AEC-Q101 and meets RTCA DO-160F Waveform 4 Level 4 and IEC 61000-4-5 Class 1–5 lightning standards.
For engineers reviewing the MAPLAD36KP20A datasheet, MAPLAD36KP20A pinout, MAPLAD36KP20A application, or MAPLAD36KP20A equivalent, key selection criteria include its 20 V VWM rating, 34.0 V max clamping voltage at 1059 A, low RθJC of 1.0 °C/W, AEC-Q101 qualification, and compliance with RTCA DO-160F Waveform 4 (6.4/69 μs) and IEC 61000-4-5 secondary lightning protection requirements.
Technical Context
The MAPLAD36KP20A is a silicon avalanche diode TVS optimized for multi-stroke lightning transients and load dump events. Its thermally enhanced PLAD package minimizes junction-to-case thermal resistance (1.0 °C/W), enabling reliable energy dissipation under repetitive 0.05% duty cycle surges. The device operates with a defined cathode on the metal base (package bottom), requiring correct PCB pad layout per Microsemi's recommended footprint.
It supports both standalone transient suppression and coordinated protection in conjunction with upstream filters or gas discharge tubes. Electrical behavior is characterized by tight V(BR) tolerance (22.2–24.5 V), low standby current (≤45 μA @ 20 V), and temperature coefficient αV(BR) of +18 mV/°C - critical for stable clamping across -55°C to +150°C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - maximum continuous DC or peak AC voltage the device blocks without conduction. |
| V(BR) min/max | 22.2–24.5 V @ 5 mA - ensures predictable avalanche initiation within narrow tolerance for consistent clamping onset. |
| VC @ IPP | 34.0 V @ 1059 A - limits downstream circuit voltage during worst-case 10/1000 μs surge, protecting 24 V rail electronics. |
| PPP | 36,000 W @ 10/1000 μs - enables single-device handling of high-energy lightning-induced transients per DO-160 Section 22. |
| RθJC | 1.0 °C/W - allows efficient heat transfer to heatsink or copper plane, supporting sustained reliability under thermal cycling. |
| ID @ VWM | ≤45 μA - ensures negligible leakage in always-on 24 V systems, minimizing standby power loss and false triggering. |
| αV(BR) | +18 mV/°C - quantifies positive drift of breakdown voltage with temperature, enabling accurate derating in high-temp environments. |
Pinout & Package
The MAPLAD36KP20A 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 marked on the metal base (bottom side). Recommended pad layout: 11.94 mm × 5.85 mm footprint with 2.44 mm solder mask opening.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (top surface) | Transient current entry point during reverse-bias surge | Connected to protected line (e.g., 24 V supply rail); must route with low-inductance path to ground. |
| Cathode (metal base) | Current return path and thermal interface | Soldered directly to large copper pour or heatsink; serves as primary thermal conduction path and electrical reference. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including HTOL, TC, and HAST testing - suitable for under-hood and chassis-mounted modules. |
| RTCA DO-160F Waveform 4 Level 4 compliance | Withstands 6.4/69 μs pin-injection transients up to 20 V VWM devices - certified for avionics power input protection. |
| IEC 61000-4-5 Class 1–5 support (42 Ω source) | Meets secondary lightning immunity for industrial and aerospace equipment with 20 V VWM configuration. |
| Moisture sensitivity Level 1 | No dry pack or baking required before reflow - simplifies SMT assembly and reduces manufacturing cost. |
| RoHS-compliant (e3 marking) | Lead-free matte-tin plating meets EU RoHS Directive 2011/65/EU and JEDEC J-STD-020B standards. |
Applications
| Aerospace Power Input Protection | Automotive Load Dump Suppression |
|---|---|
Use Scenario: Protecting 24 V avionics power supplies against induced transients from lightning coupling into airframe wiring. IC Role / Device Role / Timing Role: Unidirectional TVS diode clamping transient overvoltage on main DC bus prior to DC/DC converter input. Use Value: Enables compliance with RTCA DO-160F Section 22 multi-stroke lightning test using single MAPLAD36KP20A per rail. | Use Scenario: Safeguarding engine control units (ECUs) during alternator load dump events in 24 V commercial vehicles. IC Role / Device Role / Timing Role: Primary surge clamp on battery feed line, absorbing >36 kW energy within 1000 μs to prevent MOSFET gate oxide failure. Use Value: Eliminates need for external heatsinking due to 1.0 °C/W RθJC, reducing board area and system weight. |
| Industrial Motor Drive DC Bus Clamping | Railway Signaling Interface Protection |
Use Scenario: Shielding PLC I/O modules connected to 24 V DC motor drive power rails from switching-induced transients. IC Role / Device Role / Timing Role: Standoff-rated TVS placed between +24 V rail and chassis ground to limit common-mode surge propagation. Use Value: Maintains <45 μA leakage at 20 V VWM, preventing false tripping of low-power monitoring circuits during normal operation. | Use Scenario: Protecting track-side signaling electronics from EFT bursts and lightning-induced surges on 24 V communication lines. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional TVS used in back-to-back configuration for differential line protection. Use Value: Achieves IEC 61000-4-4 Level 4 EFT immunity and IEC 61000-4-5 Class 3 (42 Ω) without derating - validated per Microsemi test report RF01216. |
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 SP36-20 | Same 20 V VWM and 36 kW PPP rating, but RθJC = 1.5 °C/W and no AEC-Q101 qualification. | Approved for industrial use only; not certified for DO-160F or automotive under-hood deployment. | Select when cost sensitivity outweighs aerospace qualification and thermal performance requirements. |
| Vishay SMAJ20A | Lower 400 W PPP rating, 5.0 °C/W RθJC, and no RTCA DO-160F validation - intended for consumer-grade surge suppression. | Only suitable for low-energy ESD/EFT events; cannot meet multi-stroke lightning or load dump energy demands. | Choose only for non-critical 24 V interfaces where peak surge energy remains below 500 J. |
Compared with SP36-20 and SMAJ20A, the MAPLAD36KP20A provides superior thermal management (1.0 °C/W), full AEC-Q101 and DO-160F certification, and guaranteed 36 kW surge handling - making it the sole option for certified aerospace and heavy-duty automotive load dump protection.
Availability
MAPLAD36KP20A is available at Aetrix Electronics and suitable for aerospace power input protection, automotive load dump suppression, and industrial motor drive DC bus clamping requiring stable component supply across extended production lifecycles.
Supply support for MAPLAD36KP20A 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, mixed-signal, and radiation-hardened ICs for aerospace, defense, and industrial markets.
The MAPLAD36KP20A belongs to Microsemi's PLAD-series high-power TVS family, engineered specifically for multi-stroke lightning protection and automotive load dump compliance in mission-critical 24 V systems.
FAQ
What is the maximum clamping voltage of the MAPLAD36KP20A during a 10/1000 μs surge?
The MAPLAD36KP20A has a maximum clamping voltage (VC) of 34.0 V when subjected to its rated peak pulse current of 1059 A under 10/1000 μs waveform conditions. This value is measured per Figure 3 in Microsemi's RF01216 datasheet and defines the upper voltage limit imposed on protected circuitry during worst-case transient events. Designers use this parameter to verify that downstream components remain within their absolute maximum voltage ratings.
Is the MAPLAD36KP20A qualified for automotive applications?
Yes, the MAPLAD36KP20A is fully qualified to AEC-Q101 for automotive use. It undergoes stress testing including high-temperature operating life (HTOL), temperature cycling (TC), and highly accelerated stress test (HAST) per the standard. Its 20 V VWM and 34.0 V clamping voltage make it suitable for 24 V load dump protection in ECUs, battery management systems, and chassis electronics - confirmed in Microsemi's RF01216 Rev B documentation.
Does the MAPLAD36KP20A require moisture-sensitive level (MSL) handling?
No, the MAPLAD36KP20A is rated MSL Level 1 per IPC/JEDEC J-STD-020B, meaning it has unlimited floor life and does not require dry packing or baking prior to reflow soldering. This simplifies manufacturing logistics and eliminates moisture-related popcorning risks during SMT assembly - a verified characteristic documented in the RF01216 datasheet section "Mechanical and Packaging".
How is thermal management implemented in the MAPLAD36KP20A package?
The MAPLAD36KP20A uses a thermally optimized PLAD package with a metal base acting as both cathode terminal and primary heat path. Its junction-to-case thermal resistance is specified at 1.0 °C/W, enabling direct conduction of surge energy into PCB copper planes or external heatsinks. Effective thermal design requires adherence to Microsemi's recommended pad layout (11.94 mm × 5.85 mm) and minimum 2 oz copper on inner layers - details provided in RF01216 Rev B Package Dimensions.
Can the MAPLAD36KP20A be used for bidirectional transient protection?
No, the MAPLAD36KP20A is unidirectional only. Bidirectional variants carry the "CA" suffix (e.g., MAPLAD36KP20CA). Using the MAPLAD36KP20A in AC or differential signal paths would result in forward conduction during negative half-cycles, potentially damaging the device or circuit. For bidirectional protection, select the CA version or implement back-to-back unidirectional devices - guidance explicitly stated in Microsemi's nomenclature table and polarity notes in RF01216.
MAPLAD36KP20A 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):
- 20V
- Voltage - Breakdown (Min):
- 22.2V
- Voltage - Clamping (Max) @ Ipp:
- 34V
- Current - Peak Pulse (10/1000µs):
- 1059A (1.059kA)
- 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
MAPLAD36KP20A FAQ
1.How can I place an order for MAPLAD36KP20A through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD36KP20A 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 MAPLAD36KP20A reliable?
The price and inventory of MAPLAD36KP20A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD36KP20A is usually 5 days.
3.What payment methods are accepted for MAPLAD36KP20A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD36KP20A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD36KP20A?
MAPLAD36KP20A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD36KP20A 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 MAPLAD36KP20A?
For technical support, including MAPLAD36KP20A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD36KP20A requirements.
6.How does Aetrix verify that MAPLAD36KP20A is sourced from the original manufacturer or authorized distributors?
All MAPLAD36KP20A 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 MAPLAD36KP20A meets industry standards.
7.What is the process for return or replacement of MAPLAD36KP20A?
All MAPLAD36KP20A units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD36KP20A, 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 MAPLAD36KP20A part is unused and in its original packaging.
Return procedure for MAPLAD36KP20A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD36KP20A Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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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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Diodes Incorporated
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