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Microchip Technology MAPLAD36KP26A
- Part No.:
- MAPLAD36KP26A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD36KP26A.pdf
- Description:
- TVS DIODE 26VWM 43VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:3,171
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Product details
Overview
MAPLAD36KP26A 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 transients to ≤43.0 V at 838 A, and features a 26 V reverse standoff voltage (VWM), 28.9–31.9 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-160 Section 22 multi-stroke lightning requirements.
For engineers reviewing the MAPLAD36KP26A datasheet, MAPLAD36KP26A pinout, MAPLAD36KP26A application, or MAPLAD36KP26A equivalent, key selection criteria include its 26 V VWM rating, 838 A IPP capability, low-profile PLAD package with metal-base cathode, and compliance with IEC 61000-4-5 (Class 3, 42 Ω source) and RTCA DO-160F Waveform 4 Level 4 protection.
Technical Context
The MAPLAD36KP26A operates as a silicon avalanche diode-based TVS, leveraging controlled avalanche breakdown to clamp fast-rising transients. Its unidirectional polarity and metal-base cathode configuration enable direct thermal coupling to PCB copper or heatsinks, supporting high-repetition-rate surge handling when mounted per recommended pad layout.
It is characterized for operation across –55 °C to +150 °C junction temperature, with standby current ID ≤10 μA at 26 V, and exhibits a 24 mV/°C temperature coefficient of breakdown voltage. The device is surge-tested per AEC-Q101 and supports secondary lightning protection per IEC 61000-4-5 under 42 Ω, 12 Ω, and 2 Ω source impedances.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 36,000 W @ 10/1000 μs - enables single-device suppression of severe load dump and lightning-induced surges |
| Reverse Standoff Voltage (VWM) | 26 V - maximum continuous DC or peak AC voltage the device blocks without conduction |
| Breakdown Voltage (V(BR)) | 28.9–31.9 V @ 5 mA - defines onset of avalanche clamping; tight tolerance ensures predictable turn-on |
| Max Clamping Voltage (VC) | 43.0 V @ 838 A - limits downstream circuit voltage during worst-case surge, protecting 30 V-rated components |
| Junction-to-Case Thermal Resistance | 1.0 °C/W - allows efficient heat transfer to heatsink or copper pour, critical for multi-pulse reliability |
| Standby Current (ID) | ≤10 μA @ 26 V - ensures negligible leakage in battery-sensitive or always-on systems |
| Operating Temperature Range | –55 °C to +150 °C - supports deployment in engine bays, avionics bays, and industrial control enclosures |
Pinout & Package
MAPLAD36KP26A uses the PLAD (Plastic Low-Profile Anode-Diode) 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). Mounting requires the specified pad layout (A = 11.94 mm, B = 5.85 mm) for thermal and mechanical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Top Surface Pad) | Positive input terminal | Soldered to PCB trace; carries surge current into device during forward-biased transient events |
| Cathode (Metal Base) | Negative return / heat sink interface | Electrically and thermally connected to ground plane or heatsink; must be fully exposed and unmasked |
Key Features
| Feature | Design Value |
|---|---|
| 36 kW Peak Pulse Power Rating | Enables single-device protection against RTCA DO-160 Section 22 multi-stroke lightning (Waveform 4 Level 4) without parallel staging |
| Metal-Base Cathode Construction | Reduces thermal resistance to 1.0 °C/W, allowing >50% higher sustained surge repetition vs. standard SMD TVS packages |
| AEC-Q101 Qualified | Validated for automotive powertrain and chassis applications requiring zero defect reliability and lot traceability |
| IEC 61000-4-5 Class 3 Compliance (42 Ω) | Guarantees clamping performance under standardized 2 kV/1 kA surge test conditions for industrial equipment interfaces |
| Moisture Sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints-ready for standard SMT reflow without baking |
Applications
| Aerospace Avionics Power Input | Automotive Engine Control Unit (ECU) |
|---|---|
Use Scenario: Protection of 28 V DC aircraft bus inputs against lightning-induced transients per RTCA DO-160F Section 22 Waveform 4. IC Role / Device Role / Timing Role: Primary surge shunt device placed directly at connector entry point, clamping surges before they reach DC-DC converters and microcontrollers. Use Value: Delivers 43.0 V clamping at 838 A, ensuring downstream 30 V-rated regulators and FPGAs remain within absolute maximum ratings during Level 4 multi-stroke events. | Use Scenario: Load dump protection on 12 V battery-fed ECU power rails following ISO 7637-2 Pulse 5a (110 V, 400 ms). IC Role / Device Role / Timing Role: Unidirectional TVS placed upstream of LDOs and CAN transceivers to absorb 36 kW energy bursts without failure. Use Value: Withstands ≥1000 surge cycles at 0.05% duty factor due to low RθJC (1.0 °C/W), eliminating thermal runaway in under-hood environments up to +125 °C ambient. |
| Industrial Motor Drive DC Bus | Railway Signaling Power Supply |
Use Scenario: Secondary protection on 24–48 V DC bus lines subject to inductive switching transients from contactor coil de-energization. IC Role / Device Role / Timing Role: Fast-response clamping element paralleled with bulk capacitance to limit dv/dt and prevent MOSFET gate oxide damage. Use Value: Sub-100 ps response time and 43.0 V VC ensure sensitive gate drivers see <50 V stress, reducing need for derating or additional series impedance. | Use Scenario: Surge protection for 110 V DC signaling power supplies in trackside cabinets exposed to induced surges from nearby traction currents. IC Role / Device Role / Timing Role: Standoff-rated TVS used in coordination with upstream MOVs to provide precise clamping and extend system-level surge life. Use Value: 26 V VWM and 43.0 V VC allow clean coordination with 30 V-rated DC-DC modules, enabling selective protection without over-clamping losses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ26A | Lower PPP (600 W), smaller SMB package, RθJC ≈ 40 °C/W, VWM = 26 V, VC = 42.1 V @ 14.3 A | Only suitable for low-energy transients (e.g., ESD, EFT); cannot meet DO-160 lightning or load dump requirements | Select SMBJ26A only for cost-sensitive consumer electronics where surge energy is <10 J and repetition rate is low. |
| SMCJ26A | Higher PPP (1500 W), larger SMC package, RθJC ≈ 10 °C/W, VWM = 26 V, VC = 42.1 V @ 35.7 A | Supports moderate industrial surges but lacks AEC-Q101 qualification and fails DO-160 multi-stroke testing | Choose SMCJ26A for non-automotive/avionics industrial controls needing better thermal performance than SMBJ but not full 36 kW capability. |
Compared with SMBJ26A and SMCJ26A, MAPLAD36KP26A provides 24× and 24× higher peak pulse power respectively, achieves 40× and 10× lower thermal resistance, and is the only option qualified to AEC-Q101 and validated for RTCA DO-160F multi-stroke lightning-making it irreplaceable in safety-critical aerospace and automotive power entry designs.
Availability
MAPLAD36KP26A is available at Aetrix Electronics and suitable for aerospace avionics, automotive ECU power protection, and industrial motor drive DC bus applications requiring stable component supply, long-term lifecycle assurance, and traceable high-reliability sourcing.
Supply support for MAPLAD36KP26A 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 MAPLAD36KP26A belongs to Microsemi's PLAD-series high-power TVS family, engineered specifically for mission-critical surge protection in environments where multi-stroke lightning, load dump, and EFT events demand guaranteed clamping performance and thermal survivability.
FAQ
What is the maximum clamping voltage of the MAPLAD36KP26A at its rated peak pulse current?
The MAPLAD36KP26A has a maximum clamping voltage (VC) of 43.0 V at its rated peak pulse current (IPP) of 838 A under 10/1000 μs waveform conditions. This value is measured per Figure 3 in the RF01216 datasheet and ensures downstream 30 V-rated components remain within safe operating limits during worst-case surge events.
Is the MAPLAD36KP26A suitable for bidirectional transient protection?
No, the MAPLAD36KP26A is a unidirectional TVS diode. Its part number suffix "A" (not "CA") confirms unidirectional construction. For bidirectional protection at 26 V standoff, the correct variant is MAPLAD36KP26CA, which features symmetrical clamping in both polarities and is tested per IEC 61000-4-5 in both directions.
Does the MAPLAD36KP26A require special PCB layout considerations?
Yes. The MAPLAD36KP26A requires the exact pad layout specified in RF01216 (A = 11.94 mm, B = 5.85 mm) to ensure mechanical stability and optimal thermal conduction. The metal base (cathode) must be soldered to a large, unmasked copper area or heatsink - insufficient copper area increases RθJA and risks thermal failure during repeated surges.
What industry standards does the MAPLAD36KP26A comply with?
The MAPLAD36KP26A complies with AEC-Q101 for automotive qualification, IEC 61000-4-5 (Class 3, 42 Ω source), RTCA DO-160F Section 22 Waveform 4 Level 4, and IEC 61000-4-2/4-4 for ESD/EFT immunity. It is also RoHS compliant (e3 marking) and moisture sensitivity level 1 per J-STD-020B.
Can the MAPLAD36KP26A be used in parallel to increase surge current handling?
No - the MAPLAD36KP26A is not characterized or recommended for parallel operation. Its avalanche characteristics are not matched for current sharing, and thermal coupling between devices on a shared heatsink introduces imbalance. For higher current needs, select a higher-VWM variant (e.g., MAPLAD36KP30A) or consult Microsemi's application engineering for system-level coordination strategies.
MAPLAD36KP26A 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):
- 26V
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 43V
- Current - Peak Pulse (10/1000µs):
- 838A
- 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
MAPLAD36KP26A FAQ
1.How can I place an order for MAPLAD36KP26A through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD36KP26A 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 MAPLAD36KP26A reliable?
The price and inventory of MAPLAD36KP26A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD36KP26A is usually 5 days.
3.What payment methods are accepted for MAPLAD36KP26A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD36KP26A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD36KP26A?
MAPLAD36KP26A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD36KP26A 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 MAPLAD36KP26A?
For technical support, including MAPLAD36KP26A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD36KP26A requirements.
6.How does Aetrix verify that MAPLAD36KP26A is sourced from the original manufacturer or authorized distributors?
All MAPLAD36KP26A 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 MAPLAD36KP26A meets industry standards.
7.What is the process for return or replacement of MAPLAD36KP26A?
All MAPLAD36KP26A units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD36KP26A, 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 MAPLAD36KP26A part is unused and in its original packaging.
Return procedure for MAPLAD36KP26A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD36KP26A Tags
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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