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Microchip Technology MAPLAD36KP120A
- Part No.:
- MAPLAD36KP120A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD36KP120A.pdf
- Description:
- TVS DIODE 120VWM 193VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:6,039
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Product details
Overview
MAPLAD36KP120A 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 ≤193 V under 187 A peak impulse current, and features a 120 V reverse standoff voltage (VWM) with 133–147 V breakdown range (V(BR)). Its low-profile thermoset epoxy package enables robust lightning protection per RTCA DO-160 Section 22 and secondary surge suppression per IEC 61000-4-5.
For engineers reviewing the MAPLAD36KP120A datasheet, MAPLAD36KP120A pinout, MAPLAD36KP120A application, or MAPLAD36KP120A equivalent, this device is selected for high-reliability DC bus protection where multi-stroke lightning immunity, thermal resistance <1.0 °C/W (junction-to-case), and AEC-Q101 qualification are required - especially in avionics power distribution units and 24/28 V vehicle load-dump circuits.
Technical Context
The MAPLAD36KP120A employs an avalanche diode structure optimized for fast response (<5 ns clamping time) and high cumulative energy handling. Its metal-base cathode construction minimizes thermal resistance, enabling sustained operation at junction temperatures up to +150 °C when mounted on FR4 with recommended pad layout.
It meets RTCA DO-160F Waveform 4 (6.4/69 μs) Level 4 and Waveform 5A (40/120 μs) Level 4 protection requirements at 120 V standoff, and supports IEC 61000-4-2 ESD (±30 kV contact), IEC 61000-4-4 EFT (40 A), and IEC 61000-4-5 surge (Class 1–4, 2–42 Ω source impedance) without external coordination components.
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 multi-stroke scenarios |
| Reverse Standoff Voltage (VWM) | 120 V - maximum continuous DC or peak AC voltage the device blocks during normal operation without leakage exceeding 10 μA |
| Breakdown Voltage (V(BR)) | 133–147 V @ 5 mA - precise avalanche onset threshold ensuring predictable turn-on before system overvoltage damage occurs |
| Clamping Voltage (VC) | ≤193 V @ 187 A - limits downstream component stress to safe levels during worst-case transients per IEC 61000-4-5 |
| Thermal Resistance (RθJC) | 1.0 °C/W - enables direct heat transfer from junction to heatsink-mounted metal base, critical for high-repetition-rate surge environments |
| Junction Temperature Range | −55 to +150 °C - qualified for extended operation in engine bay, avionics bays, and other extreme-temperature zones |
| Surge Current (IPP) | 187 A @ 10/1000 μs - peak current capability directly tied to 36 kW rating; validated per AEC-Q101 stress test conditions |
Pinout & Package
MAPLAD36KP120A uses a surface-mount PLAD package with a metal base acting as the cathode terminal. The body is void-free thermosetting epoxy (UL94V-0), with matte-tin plating on terminals for solderability per MIL-STD-750 Method 2026. Dimensions: 12.32 × 10.54 × 5.08 mm (L × W × H), weight ≈ 1.7–2.0 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Metal Base (Bottom) | Cathode | Primary heat path and high-current return node; must be soldered to copper pour or heatsink for RθJC = 1.0 °C/W performance |
| Top Surface Pad | Anode | Signal/power input node; connects to protected line (e.g., 28 V aircraft bus); polarity marked on body for unidirectional orientation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including HTOL, temperature cycling, and surge endurance testing |
| RTCA DO-160F Section 22 compliance | Passes multi-stroke lightning waveform testing (Waveform 4 & 5A) at Level 4 - essential for FAA-certified avionics |
| Low-profile SMT footprint | Enables high-density PCB layout while maintaining >36 kW surge capacity - eliminates through-hole mounting constraints |
| Wafer and assembly lot traceability | Supports full supply chain auditability for defense and aerospace programs requiring MIL-PRF-19500 upscreening options |
| Moisture Sensitivity Level 1 | No dry pack or baking required prior to reflow - reduces manufacturing overhead and avoids moisture-induced popcorning |
Applications
| Aerospace Power Distribution Unit (PDU) | Commercial Vehicle 24 V Load-Dump Protection |
|---|---|
Use Scenario: Protecting 28 V DC bus inputs in airborne power converters subjected to lightning-induced surges per RTCA DO-160 Section 22. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed at PDU input stage to clamp transients before they reach DC-DC controllers and FET drivers. Use Value: Enables compliance with Level 4 pin-injection immunity (Waveform 4) and prevents latch-up or gate oxide rupture in downstream SiC MOSFETs operating at 100 kHz switching frequencies. |
Use Scenario: Safeguarding engine control unit (ECU) power inputs against 120 V load-dump spikes generated during alternator disconnection in heavy-duty trucks. IC Role / Device Role / Timing Role: Primary surge suppression element across battery feed line, coordinated with upstream fuse and downstream LC filter. Use Value: Limits clamped voltage to ≤193 V for <187 A events, preserving 200 V-rated input capacitors and avoiding brownout-induced firmware resets. |
| Industrial Motor Drive DC Link | Railway Signaling Power Interface |
Use Scenario: Protecting regenerative braking energy recovery circuits in variable-frequency drives exposed to IEC 61000-4-5 Class 4 surges (42 Ω source). IC Role / Device Role / Timing Role: Bidirectional-capable variant (MAPLAD36KP120CA) used in symmetric DC link clamping; unidirectional MAPLAD36KP120A applied on positive rail only. Use Value: Absorbs 36 kW pulses without derating at 25 °C ambient, reducing need for parallel devices and simplifying thermal design on crowded drive PCBs. |
Use Scenario: Securing 110 V DC trackside signaling power supplies against induced surges from nearby lightning strikes per EN 50121-4. IC Role / Device Role / Timing Role: Secondary protection stage following gas discharge tube (GDT), providing fast-response clamping after GDT arc initiation. Use Value: Achieves <5 ns response time to limit let-through voltage to <193 V, preventing false tripping of 120 V-rated relay coils and optocouplers. |
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 SP36-120 | Same 120 V VWM and 36 kW PPP rating, but RθJC = 1.5 °C/W; RoHS-compliant only (no Pb option) | Validated for UL 497B telecom surge, not RTCA DO-160F; lacks AEC-Q101 qualification | Select when cost-sensitive industrial designs require UL-listed surge rating but do not demand aerospace or automotive qualification. |
| Vishay SMAJ120A | Lower 400 W PPP rating, 5.0 kW max; TO-277 package with RθJC = 12 °C/W; no DO-160 or AEC-Q101 data | Targeted at consumer electronics and basic ESD/EFT protection; unsuitable for multi-stroke lightning or load-dump duty cycles | Choose only for low-energy board-level protection where space allows larger footprint and thermal performance is non-critical. |
Compared with SP36-120 and SMAJ120A, the MAPLAD36KP120A uniquely combines AEC-Q101 qualification, RTCA DO-160F Level 4 compliance, and 1.0 °C/W thermal resistance - making it the only option for high-reliability, high-repetition-rate surge environments in certified avionics and commercial vehicle ECUs.
Availability
MAPLAD36KP120A is available at Aetrix Electronics and suitable for aerospace power distribution units, commercial vehicle load-dump protection circuits, and industrial motor drive DC links requiring stable component supply across extended production lifecycles.
Supply support for MAPLAD36KP120A 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 MAPLAD36KP120A belongs to Microsemi's high-power PLAD TVS family, engineered specifically for mission-critical surge protection in environments demanding multi-stroke lightning resilience, AEC-Q101 validation, and minimal thermal resistance.
FAQ
What is the clamping voltage specification for MAPLAD36KP120A under standard test conditions?
The MAPLAD36KP120A has a maximum clamping voltage (VC) of 193 V when subjected to its rated peak pulse current of 187 A at the 10/1000 μs waveform. This value is measured per IEC 61000-4-5 test methodology and ensures downstream circuitry remains within safe operating voltage limits during surge events. The clamping performance is guaranteed across the full −55 to +150 °C junction temperature range.
Does MAPLAD36KP120A meet AEC-Q101 reliability standards?
Yes, MAPLAD36KP120A is fully qualified to AEC-Q101 standards, including stress tests for high-temperature operating life (HTOL), temperature cycling, and surge current endurance. This qualification confirms its suitability for automotive electronic control units and other high-reliability applications where long-term field stability under thermal and electrical stress is mandatory.
How does the metal base of MAPLAD36KP120A function electrically and thermally?
The metal base of MAPLAD36KP120A serves as the cathode terminal and primary thermal conduction path. Electrically, it forms the low-inductance return node for surge current. Thermally, it provides a 1.0 °C/W junction-to-case resistance when soldered to a properly sized copper pour or heatsink - a critical feature enabling sustained multi-pulse operation without thermal runaway.
Can MAPLAD36KP120A be used for bidirectional surge protection?
No - MAPLAD36KP120A is unidirectional. For bidirectional protection at 120 V standoff, the correct variant is MAPLAD36KP120CA (with "CA" suffix). The "A" suffix denotes unidirectional polarity, while "CA" indicates center-tapped bidirectional construction. Using MAPLAD36KP120A in AC-coupled or bipolar signal paths will result in forward conduction and failure.
What is the moisture sensitivity level (MSL) and reflow profile requirement for MAPLAD36KP120A?
MAPLAD36KP120A is rated MSL Level 1 per IPC/JEDEC J-STD-020B, meaning it has unlimited floor life and requires no dry-packaging or baking prior to reflow soldering. Standard lead-free reflow profiles apply, with peak temperature up to 260 °C for 10 seconds - consistent with its thermoset epoxy body and matte-tin terminations.
MAPLAD36KP120A 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):
- 120V
- Voltage - Breakdown (Min):
- 133V
- Voltage - Clamping (Max) @ Ipp:
- 193V
- Current - Peak Pulse (10/1000µs):
- 187A
- 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
MAPLAD36KP120A FAQ
1.How can I place an order for MAPLAD36KP120A through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD36KP120A 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 MAPLAD36KP120A reliable?
The price and inventory of MAPLAD36KP120A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD36KP120A is usually 5 days.
3.What payment methods are accepted for MAPLAD36KP120A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD36KP120A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD36KP120A?
MAPLAD36KP120A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD36KP120A 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 MAPLAD36KP120A?
For technical support, including MAPLAD36KP120A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD36KP120A requirements.
6.How does Aetrix verify that MAPLAD36KP120A is sourced from the original manufacturer or authorized distributors?
All MAPLAD36KP120A 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 MAPLAD36KP120A meets industry standards.
7.What is the process for return or replacement of MAPLAD36KP120A?
All MAPLAD36KP120A units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD36KP120A, 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 MAPLAD36KP120A part is unused and in its original packaging.
Return procedure for MAPLAD36KP120A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD36KP120A Tags
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Diodes Incorporated
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