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Microchip Technology MAPLAD36KP54CA
- Part No.:
- MAPLAD36KP54CA
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD36KP54CA.pdf
- Description:
- TVS DIODE 54VWM 87.1VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:3,344
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Product details
Overview
MAPLAD36KP54CA from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace and automotive systems. It delivers 36,000 W peak pulse power at 10/1000 μs, clamps transients to ≤87.1 V at 414 A, and operates with a 54 V reverse standoff voltage (VWM). It meets RTCA DO-160 Section 22 multi-stroke lightning requirements and IEC 61000-4-5 Class 5 (short distance) with 42 Ω source impedance.
For engineers reviewing the MAPLAD36KP54CA datasheet, MAPLAD36KP54CA pinout, MAPLAD36KP54CA application, or MAPLAD36KP54CA equivalent, key selection criteria include its bidirectional polarity, 54 V VWM rating, 87.1 V max clamping voltage at 414 A, thermal resistance of 1.0 °C/W junction-to-case, and compliance with AEC-Q101 and MIL-PRF-19500 screening options.
Technical Context
The MAPLAD36KP54CA is a silicon avalanche diode-based TVS optimized for low-clamping, high-reliability surge suppression. Its bidirectional construction enables symmetrical clamping for AC-coupled or floating signal lines, and its void-free thermosetting epoxy package supports stable thermal performance under repeated 10/1000 μs surges at ≤0.05% duty factor.
It features a metal-base cathode configuration (for unidirectional variants), but the CA suffix confirms bidirectional symmetry with no designated anode/cathode terminals. The device is characterized at 25°C with 5 mA breakdown current (I(BR)), exhibits ±64 mV/°C temperature coefficient of V(BR), and maintains <10 μA standby current at VWM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 36,000 W @ 10/1000 μs - sustains aircraft lightning-induced surges without failure |
| Reverse Standoff Voltage (VWM) | 54 V - maximum continuous operating voltage before clamping initiates |
| Max Clamping Voltage (VC) | 87.1 V @ 414 A - limits downstream circuit voltage during worst-case surge |
| Breakdown Voltage (V(BR)) | 60.0–66.3 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 heatsink |
| Standby Current (ID) | ≤10 μA @ 54 V - negligible leakage in normal operation |
| Temperature Coefficient αV(BR) | +64 mV/°C - quantifies V(BR) drift over operating range (−55 to +150°C) |
Pinout & Package
MAPLAD36KP54CA uses a surface-mount PLAD package with two terminals: both leads are electrically symmetrical due to bidirectional construction. The metal base serves as common thermal path and mechanical mounting surface, not an active terminal. No polarity marking is present on bidirectional variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (symmetrical) | Either terminal accepts positive or negative surge; no fixed polarity |
| Terminal 2 | Anode/Cathode (symmetrical) | Completes bidirectional conduction path; identical electrical role to Terminal 1 |
| Metal Base | Thermal Interface | Low-resistance thermal path to PCB copper pour or heatsink; not electrically isolated |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional surge suppression | Enables protection of AC-coupled data lines, differential buses, or floating power rails without polarity constraints |
| 36 kW peak pulse rating | Meets RTCA DO-160 Section 22 multi-stroke lightning test requirements for commercial aircraft |
| 1.0 °C/W RθJC | Supports sustained surge duty cycles when mounted on ≥1 in² 2-oz copper pad per Microsemi pad layout |
| AEC-Q101 qualified | Validated for automotive load dump and ISO 7637-2 transient immunity applications |
| RoHS-compliant (e3) | Matte-tin plating ensures solderability per MIL-STD-750 Method 2026 and lead-free assembly compatibility |
Applications
| Aircraft Avionics Power Input | Automotive Engine Control Unit (ECU) |
|---|---|
Use Scenario: Protection of 28 V DC power inputs in flight control computers exposed to lightning-induced surges per RTCA DO-160F Waveform 4 (Level 4). IC Role / Device Role / Timing Role: Primary transient voltage suppressor placed upstream of DC/DC converters and LDOs. Use Value: Limits input voltage to ≤87.1 V during 414 A surges, preventing damage to downstream regulators rated for <100 V absolute maximum. | Use Scenario: Load dump protection on 12 V battery-fed ECU power rails per ISO 7637-2 Pulse 5a (120 V, 400 ms). IC Role / Device Role / Timing Role: High-energy clamping device absorbing >300 J energy during alternator disconnection events. Use Value: Clamps 12 V system to <90 V within nanoseconds, preserving microcontroller and CAN transceiver functionality. |
| Industrial Motor Drive DC Bus | Railway Signaling Interface |
Use Scenario: Surge protection on 48–60 V DC bus lines in variable-frequency drives subject to IEC 61000-4-5 Class 4 (42 Ω, 4 kV) tests. IC Role / Device Role / Timing Role: Secondary lightning protector located after primary MOV-based front-end filtering. Use Value: Provides precise 54 V clamping window aligned with 60 V-rated IGBT gate drivers, reducing overvoltage stress by >30% vs. generic 68 V TVS. | Use Scenario: Protection of 54 V signaling lines in European railway interlocking systems compliant with EN 50121-4. IC Role / Device Role / Timing Role: Bidirectional TVS on RS-485 or MVB physical layer interfaces exposed to traction-induced transients. Use Value: Symmetrical clamping ensures equal protection for positive/negative line faults, eliminating need for dual unidirectional devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ54CA | 600 W PPP rating, 54 V VWM, SMC package, RθJC = 10.5 °C/W | Limited to single-stroke surges; unsuitable for RTCA DO-160 multi-stroke testing | Select SMBJ54CA only for cost-sensitive industrial controls with <1 kA surge exposure |
| SMCJ54CA | 1500 W PPP rating, 54 V VWM, SMC package, RθJC = 4.5 °C/W | Cannot sustain 36 kW pulses; clamps at 93.6 V @ 139 A (vs. 87.1 V @ 414 A) | Choose SMCJ54CA for space-constrained designs where 36 kW capability is unnecessary |
Compared with SMBJ54CA and SMCJ54CA, MAPLAD36KP54CA delivers 24× and 24× higher peak pulse power respectively, enabling reliable multi-stroke lightning protection in aerospace platforms where thermal accumulation and voltage overshoot must be minimized across repeated transients.
Availability
MAPLAD36KP54CA is available at Aetrix Electronics and suitable for aircraft avionics, automotive ECU power systems, and industrial motor drive DC bus protection requiring stable component supply across extended production lifecycles.
Supply support for MAPLAD36KP54CA 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 MAPLAD36KP54CA belongs to Microsemi's high-power PLAD-series TVS family, engineered specifically for multi-stroke lightning compliance and high-temperature automotive environments where conventional TVS diodes fail under cumulative thermal stress.
FAQ
What is the clamping voltage of MAPLAD36KP54CA at its rated peak pulse current?
The MAPLAD36KP54CA has a maximum clamping voltage (VC) of 87.1 V at 414 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 worst-case surge events. The MAPLAD36KP54CA maintains this clamping performance across its full operating temperature range of −55°C to +150°C.
Does MAPLAD36KP54CA require a heatsink for standard operation?
MAPLAD36KP54CA does not require an external heatsink for single-pulse operation, as its 1.0 °C/W junction-to-case thermal resistance allows sufficient heat dissipation through the PCB copper pad per the recommended layout (≥1 in² 2-oz copper). However, for repetitive surges at >0.05% duty factor, thermal derating per Figure 5 in RF01216 must be applied. The MAPLAD36KP54CA's metal base is designed for direct thermal coupling to the board, not isolation.
Is MAPLAD36KP54CA compliant with AEC-Q101 and RoHS standards?
Yes, MAPLAD36KP54CA is qualified to AEC-Q101 for automotive applications and carries RoHS-compliant (e3) matte-tin plating per MIL-STD-750 Method 2026. Its construction uses void-free UL94V-0 epoxy and undergoes 3σ lot norm screening on standby current. The MAPLAD36KP54CA also supports optional MIL-PRF-19500 upscreening for high-reliability aerospace deployments.
How does the bidirectional design of MAPLAD36KP54CA affect PCB layout?
The bidirectional design of MAPLAD36KP54CA eliminates polarity orientation constraints during placement-either terminal may connect to either side of the protected line. Unlike unidirectional TVS diodes, MAPLAD36KP54CA requires no cathode/anode alignment, simplifying layout and reducing assembly errors. Its symmetric structure also avoids ground-loop issues in differential signaling paths, making MAPLAD36KP54CA ideal for RS-485 or CAN FD interface protection.
What is the maximum steady-state power dissipation of MAPLAD36KP54CA at 100°C case temperature?
At 100°C case temperature (TC), the MAPLAD36KP54CA has a steady-state power dissipation (PD) rating of 71 W, as specified in the "MAXIMUM RATINGS" table of RF01216 Rev B. This value assumes proper thermal management via the metal base and adheres to derating curves in Figure 5. Note that PD is distinct from peak pulse power: MAPLAD36KP54CA's 36,000 W rating applies only to transient events, not continuous operation.
MAPLAD36KP54CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- Nonstandard SMD
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 54V
- Voltage - Breakdown (Min):
- 60V
- Voltage - Clamping (Max) @ Ipp:
- 87.1V
- Current - Peak Pulse (10/1000µs):
- 414A
- 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
MAPLAD36KP54CA FAQ
1.How can I place an order for MAPLAD36KP54CA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD36KP54CA 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 MAPLAD36KP54CA reliable?
The price and inventory of MAPLAD36KP54CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD36KP54CA is usually 5 days.
3.What payment methods are accepted for MAPLAD36KP54CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD36KP54CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD36KP54CA?
MAPLAD36KP54CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD36KP54CA 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 MAPLAD36KP54CA?
For technical support, including MAPLAD36KP54CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD36KP54CA requirements.
6.How does Aetrix verify that MAPLAD36KP54CA is sourced from the original manufacturer or authorized distributors?
All MAPLAD36KP54CA 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 MAPLAD36KP54CA meets industry standards.
7.What is the process for return or replacement of MAPLAD36KP54CA?
All MAPLAD36KP54CA units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD36KP54CA, 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 MAPLAD36KP54CA part is unused and in its original packaging.
Return procedure for MAPLAD36KP54CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD36KP54CA Tags
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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