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Microchip Technology MAPLAD36KP51CAE3
- Part No.:
- MAPLAD36KP51CAE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD36KP51CAE3.pdf
- Description:
- TVS DIODE 51VWM 82.4VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:2,951
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Product details
Overview
MAPLAD36KP51CAE3 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 ≤82.4 V at 437 A, and features a 51 V reverse standoff voltage (VWM), 56.7–62.7 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 4 (42 Ω source) requirements.
For engineers reviewing the MAPLAD36KP51CAE3 datasheet, MAPLAD36KP51CAE3 pinout, MAPLAD36KP51CAE3 application, or MAPLAD36KP51CAE3 equivalent, key selection criteria include bidirectional clamping capability, 51 V working voltage alignment with 48 V nominal bus systems, low thermal resistance for high-reliability mounting on FR4, and compliance with aircraft lightning injection standards (DO-160F) and industrial surge immunity (IEC 61000-4-5).
Technical Context
This TVS diode operates as a voltage-clamped crowbar device during fast-rising transients, leveraging avalanche breakdown across its symmetric P-N-P-N structure to limit voltage excursions. Its bidirectional construction enables protection of AC-coupled or floating signal/power lines without polarity sensitivity.
It is characterized by sub-5 ns response time, <100 ps clamping delay, and stable performance under multi-stroke lightning conditions per RTCA DO-160 Section 22. Thermal design relies on direct metal-base heat sinking via the cathode terminal, supported by RθJC = 1.0 °C/W and recommended pad layout per RF01216 Rev B.
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 applications |
| Reverse Standoff Voltage (VWM) | 51 V - maximum continuous operating voltage before conduction begins; matches 48 V DC systems with 6% margin |
| Breakdown Voltage (V(BR)) | 56.7–62.7 V @ 5 mA - defines onset of avalanche conduction; ensures reliable turn-on before downstream component damage thresholds |
| Clamping Voltage (VC) | 82.4 V @ 437 A - maximum voltage seen by protected circuit during worst-case surge; limits stress on 100 V-rated components |
| Junction-to-Case Thermal Resistance | 1.0 °C/W - enables efficient heat transfer to PCB copper or external heatsink; critical for sustained multi-pulse operation |
| Surge Current (IPP) | 437 A @ 10/1000 μs - peak current handling capacity; validates robustness against automotive load dump and lightning-induced surges |
| Temperature Coefficient (αV(BR)) | +58 mV/°C - predictable positive drift allows accurate derating over -55°C to +150°C operating range |
Pinout & Package
MAPLAD36KP51CAE3 uses a surface-mount PLAD package with a metal base acting as the cathode terminal for both polarities. The device has two terminals: anode (top metallization) and cathode (exposed metal base). Mounting requires thermal pad layout per RF01216 Rev B (A = 0.470", B = 0.230", C = 0.100") to ensure mechanical stability and thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Top Surface) | AC-coupled input/output node | Connects to line being protected; bidirectional symmetry eliminates polarity concerns in differential or floating interfaces |
| Cathode (Metal Base) | Common reference / heat sink interface | Serves as primary thermal path to PCB ground plane; must be soldered to large copper area for RθJA ≤ 50 °C/W |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping architecture | Enables protection of AC signals, RS-485 buses, and ungrounded power rails without polarity constraints or external diode pairing |
| 3σ lot-norm screening on standby current (ID) | Ensures consistent leakage behavior (<10 μA @ 51 V) across production lots-critical for low-power avionics and battery-backed systems |
| RTCA DO-160F Waveform 4 Level 4 compliance | Validated for 6.4/69 μs pin-injection transients up to 51 V VWM devices, supporting certification in commercial aircraft subsystems |
| MIL-PRF-19500 upscreening option | Supports high-reliability programs requiring M, MA, MX, or MXL screening levels-including burn-in, hermeticity, and radiation testing |
| RoHS-compliant matte-tin plating (e3) | Enables lead-free reflow assembly per J-STD-020B Level 1 (no dry pack required); compatible with standard SMT processes |
Applications
| Aerospace Avionics Power Bus Protection | Automotive 48 V Mild Hybrid System Protection |
|---|---|
Use Scenario: Protecting 28 V DC distribution networks in flight control computers and inertial navigation units against lightning-induced surges per DO-160 Section 22. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed at power entry point to limit transient overvoltage before DC/DC converters and FPGAs. Use Value: Withstands ≥1000A multi-stroke events while maintaining clamping below 85 V-preserving 100 V-rated MOSFETs and ADC front-ends. |
Use Scenario: Safeguarding 48 V battery management system (BMS) communication lines and gate drivers during load dump events in 48 V mild hybrid vehicles. IC Role / Device Role / Timing Role: Primary surge suppression element on CAN FD and high-side switch control lines exposed to ISO 16750-2 transients. Use Value: 51 V VWM aligns precisely with 48 V nominal bus; 82.4 V clamping prevents latch-up in 100 V SiC gate drivers during 120 V load dump spikes. |
| Industrial Ethernet Switch Surge Port Protection | Railway Signaling Interface Protection |
Use Scenario: Securing PoE++ (IEEE 802.3bt) data lines and auxiliary power feeds in outdoor telecom switches subjected to induced lightning surges. IC Role / Device Role / Timing Role: Secondary-level TVS on RJ45 magnetics secondary side, coordinated with gas discharge tubes (GDTs) upstream. Use Value: Sub-5 ns response synchronizes with GDT follow-on conduction; 36 kW rating handles residual energy after primary diversion. |
Use Scenario: Protecting 72 V signaling circuits in European railway ERTMS/ETCS trackside equipment against EFT bursts and long-line lightning coupling. IC Role / Device Role / Timing Role: Bidirectional clamp on 2-wire current loop interfaces (e.g., 4–20 mA) and digital I/O lines connected to field sensors. Use Value: 51 V VWM accommodates 72 V open-circuit but clamps transients to safe levels for 80 V-rated optocouplers and isolators. |
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 SP3052-050 | Unidirectional, 50 V VWM, 1500 W PPP, SMC package, RθJC = 12.5 °C/W | Limited to single-polarity DC rails; insufficient for DO-160F multi-stroke or AC-coupled interfaces | Select when cost-sensitive, lower-energy 48 V DC applications require RoHS-compliant unidirectional protection only |
| Vishay SMAJ51CA | Bidirectional, 51 V VWM, 400 W PPP, SMA package, RθJC = 40 °C/W | Cannot sustain repeated 36 kW surges; unsuitable for lightning or load dump without derating or parallel staging | Choose for space-constrained consumer electronics where peak energy is <100 J and duty cycle is negligible |
Compared with MAPLAD36KP51CAE3, SP3052-050 offers lower cost but lacks bidirectionality and multi-stroke endurance, while SMAJ51CA fits smaller footprints yet cannot deliver the 36 kW pulse power or 1.0 °C/W thermal performance required for aerospace-grade surge resilience.
Availability
MAPLAD36KP51CAE3 is available at Aetrix Electronics and suitable for aerospace avionics, automotive 48 V systems, industrial Ethernet infrastructure, and railway signaling applications requiring stable component supply across extended product lifecycles.
Supply support for MAPLAD36KP51CAE3 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) designs high-reliability semiconductor solutions for aerospace, defense, and industrial markets, with emphasis on radiation-hardened ICs, timing devices, and ruggedized discrete components.
The MAPLAD36KP51CAE3 belongs to Microsemi's high-power PLAD TVS family, engineered specifically for certified lightning protection in safety-critical platforms where multi-stroke survivability and thermal stability are non-negotiable.
FAQ
What is the clamping voltage of MAPLAD36KP51CAE3 at its rated peak pulse current?
The MAPLAD36KP51CAE3 exhibits a maximum clamping voltage (VC) of 82.4 V at its rated peak pulse current (IPP) of 437 A under 10/1000 μs waveform conditions. This value is measured across the device terminals during standardized surge testing and represents the upper bound of voltage imposed on the protected circuit during worst-case transient events. The clamping performance is validated per JEDEC standards and documented in RF01216 Rev B Figure 3.
Is MAPLAD36KP51CAE3 compliant with RTCA DO-160F lightning test requirements?
Yes, MAPLAD36KP51CAE3 is verified for RTCA DO-160F Section 22 lightning-induced transient testing. Specifically, it meets Waveform 4 (6.4/69 μs) Level 4 protection up to 51 V VWM devices and supports multi-stroke qualification per aircraft environmental standards. Its 36 kW rating and sub-5 ns response enable compliance with stringent pin-injection and cable-bundle coupling test profiles defined in DO-160F.
How does the metal base cathode terminal of MAPLAD36KP51CAE3 impact thermal design?
The metal base of MAPLAD36KP51CAE3 serves as the cathode terminal and primary thermal conduction path, delivering a low 1.0 °C/W junction-to-case resistance. Effective thermal management requires soldering this base to a minimum 0.470" × 0.230" copper pad per RF01216 Rev B, enabling efficient heat dissipation into the PCB. Without proper pad layout and copper mass, junction temperature rise may exceed 150°C during repetitive surges, risking parametric shift or failure.
Does MAPLAD36KP51CAE3 meet AEC-Q101 qualification for automotive use?
Yes, MAPLAD36KP51CAE3 is tested and qualified to AEC-Q101 Rev E for discrete semiconductors. This includes stress tests for high-temperature operating life, temperature cycling, humidity bias, and surge robustness-all performed on production lots. Its qualification supports deployment in automotive 48 V mild hybrid systems, particularly for protecting gate drivers, CAN FD transceivers, and BMS controllers exposed to load dump and jump-start transients.
What is the meaning of the "CA" and "E3" suffixes in MAPLAD36KP51CAE3?
In MAPLAD36KP51CAE3, "CA" denotes bidirectional polarity (as opposed to "A" for unidirectional), confirming symmetrical clamping behavior for AC or floating signal lines. "E3" specifies RoHS-compliant matte-tin plating per IPC/JEDEC J-STD-020B Level 1, eliminating dry-pack requirements and ensuring compatibility with lead-free reflow soldering profiles up to 260°C for 10 seconds.
MAPLAD36KP51CAE3 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):
- 51V
- Voltage - Breakdown (Min):
- 56.7V
- Voltage - Clamping (Max) @ Ipp:
- 82.4V
- Current - Peak Pulse (10/1000µs):
- 437A
- 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
MAPLAD36KP51CAE3 FAQ
1.How can I place an order for MAPLAD36KP51CAE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD36KP51CAE3 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 MAPLAD36KP51CAE3 reliable?
The price and inventory of MAPLAD36KP51CAE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD36KP51CAE3 is usually 5 days.
3.What payment methods are accepted for MAPLAD36KP51CAE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD36KP51CAE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD36KP51CAE3?
MAPLAD36KP51CAE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD36KP51CAE3 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 MAPLAD36KP51CAE3?
For technical support, including MAPLAD36KP51CAE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD36KP51CAE3 requirements.
6.How does Aetrix verify that MAPLAD36KP51CAE3 is sourced from the original manufacturer or authorized distributors?
All MAPLAD36KP51CAE3 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 MAPLAD36KP51CAE3 meets industry standards.
7.What is the process for return or replacement of MAPLAD36KP51CAE3?
All MAPLAD36KP51CAE3 units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD36KP51CAE3, 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 MAPLAD36KP51CAE3 part is unused and in its original packaging.
Return procedure for MAPLAD36KP51CAE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD36KP51CAE3 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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ESD5Z5.0T1G
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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