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Microchip Technology MAPLAD36KP28CAE3
- Part No.:
- MAPLAD36KP28CAE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD36KP28CAE3.pdf
- Description:
- TVS DIODE 28VWM 46.4VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:3,776
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Product details
Overview
MAPLAD36KP28CAE3 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 kW peak pulse power at 10/1000 μs, clamps at ≤46.4 V under 776 A peak impulse current, and features a 28 V reverse standoff voltage (VWM), RoHS-compliant e3 plating, and UL94V-0 epoxy package - deployed in aircraft lightning protection per RTCA DO-160 Section 22.
For engineers reviewing the MAPLAD36KP28CAE3 datasheet, MAPLAD36KP28CAE3 pinout, MAPLAD36KP28CAE3 application, or MAPLAD36KP28CAE3 equivalent, key selection criteria include bidirectional clamping capability, IEC 61000-4-5 Class 4 compliance with 12 Ω source impedance, RTCA DO-160F Waveform 4 Level 4 rating up to 300 V variants, thermal resistance of 1.0 °C/W junction-to-case, and compatibility with FR4 PCB mounting using specified pad layout.
Technical Context
This TVS diode operates as a voltage-clamped crowbar device triggered by avalanche breakdown, with symmetrical bidirectional conduction enabled by its CA-suffix construction. Its low RθJC (1.0 °C/W) and metal-base cathode design enable efficient heat transfer to the PCB ground plane or heatsink during multi-stroke transients.
It meets secondary lightning protection requirements per IEC 61000-4-5 across multiple source impedances (2 Ω, 12 Ω, 42 Ω), supports pin-injection immunity per RTCA/DO-160F Waveforms 4 and 5A, and is AEC-Q101 qualified for automotive under-hood applications requiring robust ESD/EFT suppression per IEC 61000-4-2/4-4.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 36,000 W @ 10/1000 μs - sustains full-rated surge energy without failure in lightning or load-dump events |
| Reverse Standoff Voltage (VWM) | 28 V - maximum continuous operating voltage before clamping initiates; matches 24 V automotive and avionics bus systems |
| Clamping Voltage (VC) | 46.4 V @ 776 A - limits downstream circuit voltage to safe levels during worst-case surge conditions |
| Junction-to-Case Thermal Resistance | 1.0 °C/W - enables direct thermal coupling to PCB copper pour or heatsink for multi-pulse reliability |
| Moisture Sensitivity Level | Level 1 per J-STD-020B - no dry-pack or bake-out required prior to reflow soldering |
| RoHS Compliance | e3 suffix - matte-tin plating compliant with EU RoHS Directive 2011/65/EU and lead-free assembly processes |
| RTCA DO-160F Waveform 4 Rating | Level 4 up to 300 V variants - validated for pin-injection surge immunity in aircraft electronic units |
Pinout & Package
MAPLAD36KP28CAE3 uses a proprietary surface-mount PLAD package with metal base cathode (bidirectional symmetry eliminates polarity marking). Dimensions: 12.32 × 10.54 × 5.08 mm (L × W × H), weight ~1.7–2.0 g. Requires FR4 pad layout per datasheet Figure "PAD LAYOUT" (A = 11.94 mm, B = 5.85 mm, C = 2.44 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Top Surface (Anode/Cathode Symmetric) | Bidirectional Surge Conduction Path | No polarity marking; identical clamping behavior in both directions - simplifies layout and eliminates orientation errors |
| Metal Base (Bottom) | Cathode Terminal (Common for Both Polarity Paths) | Serves as primary thermal and electrical return path; must be soldered to large copper area for thermal management |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional Clamping Architecture | Enables symmetric surge suppression on AC-coupled or floating signal/power lines without external diode pairing |
| 36 kW Peak Pulse Power Rating | Supports multi-stroke lightning testing per RTCA DO-160 Section 22 without degradation over 1,000+ cycles |
| 1.0 °C/W Junction-to-Case Thermal Resistance | Allows >70% derated power handling at 100°C case temperature - critical for under-hood automotive modules |
| AEC-Q101 Qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge lifetime testing |
| IEC 61000-4-5 Class 4 Compliance (12 Ω Zs) | Meets stringent industrial and transportation surge immunity requirements for 4 kV line-to-ground surges |
Applications
| Aircraft Avionics Protection | Automotive Load Dump Suppression |
|---|---|
Use Scenario: Protecting flight control computers and sensor interfaces from induced lightning currents on aircraft wiring harnesses. IC Role / Device Role / Timing Role: Primary secondary lightning protector per RTCA DO-160F Section 22, clamping transients before they reach protected ICs. Use Value: Enables compliance with Level 4 pin-injection (Waveform 4) and multi-stroke lightning standards without external filtering or redundancy. | Use Scenario: Safeguarding engine control units (ECUs) and infotainment systems during alternator load dump events in 24 V commercial vehicles. IC Role / Device Role / Timing Role: Fast-acting crowbar device that clamps 120 V/400 ms transients to <47 V within <5 ns, preserving downstream MOSFETs and microcontrollers. Use Value: Eliminates need for series resistors or TVS arrays - single-device solution rated for 36 kW peak power reduces BOM count and board space. |
| Industrial Motor Drive I/O Protection | Railway Signaling Interface Protection |
Use Scenario: Shielding PLC analog input modules and encoder interfaces from switching transients generated by VFDs and contactors. IC Role / Device Role / Timing Role: Bidirectional transient suppressor on differential RS-485 or analog sensor lines exposed to inductive kickback. Use Value: Withstands repeated 4 kV surges per IEC 61000-4-5 (12 Ω Zs, Class 4), maintaining signal integrity over 10+ years of operation. | Use Scenario: Protecting track-side signaling electronics from lightning-induced surges on long-distance field wiring in rail infrastructure. IC Role / Device Role / Timing Role: Secondary surge protector installed at equipment boundary per EN 50121-4, clamping fast-rising transients before entering safety-critical logic. Use Value: Validated for IEC 61000-4-5 Class 5 (short distance, 42 Ω Zs) - ensures interoperability with legacy railway surge coordination schemes. |
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 SP3022-01ETG | Unidirectional, 300 W PPP, SOD-323 package - lower power, smaller footprint | Targeted at low-energy ESD protection on data lines, not multi-kW lightning events | Select only for board-level ESD (IEC 61000-4-2) where peak current <10 A; not suitable for MAPLAD36KP28CAE3's 776 A surge duty. |
| Vishay SMAJ28CA | Same VWM and bidirectionality, but 400 W PPP, DO-214AC package - 90× lower peak power rating | Designed for general-purpose board-level surge, not aerospace or automotive load dump | Use where cost and size constrain design and surge energy remains below 100 J; cannot replace MAPLAD36KP28CAE3 in DO-160 or ISO 7637-2 environments. |
Compared with SP3022-01ETG and SMAJ28CA, MAPLAD36KP28CAE3 provides 90× higher peak pulse power and certified multi-stroke lightning performance - essential for mission-critical systems where single-event failure is unacceptable.
Availability
MAPLAD36KP28CAE3 is available at Aetrix Electronics and suitable for aircraft avionics, commercial vehicle ECUs, and industrial motor drive I/O requiring stable component supply with traceable lot history and extended lifecycle support.
Supply support for MAPLAD36KP28CAE3 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, RF, and timing solutions for aerospace, defense, and industrial markets.
The PLAD family - including MAPLAD36KP28CAE3 - was engineered specifically for high-energy transient suppression in safety-critical platforms where multi-stroke lightning, load dump, and EFT immunity are mandatory.
FAQ
What is the clamping voltage of MAPLAD36KP28CAE3 at its rated peak pulse current?
The MAPLAD36KP28CAE3 has a maximum clamping voltage (VC) of 46.4 V when subjected to its rated peak pulse current of 776 A under 10/1000 μs waveform conditions. This value is measured per standard test methods defined in the datasheet and ensures downstream circuitry remains below safe operating thresholds during surge events.
Is MAPLAD36KP28CAE3 suitable for automotive applications requiring AEC-Q101 qualification?
Yes, MAPLAD36KP28CAE3 is explicitly tested and qualified to AEC-Q101 for stress tests including temperature cycling, highly accelerated life testing (HALT), and surge lifetime validation. Its 28 V VWM and bidirectional architecture make it ideal for 24 V commercial vehicle load dump protection in engine control and ADAS modules.
Does MAPLAD36KP28CAE3 require special PCB layout considerations?
Yes - MAPLAD36KP28CAE3 requires adherence to the manufacturer-specified pad layout (A = 11.94 mm, B = 5.85 mm) and connection of its metal base to a minimum 250 mm² copper pour for thermal dissipation. Trace inductance must be minimized; keep traces short and wide between the device and protected node to preserve <5 ns response time.
What does the 'CA' suffix indicate in MAPLAD36KP28CAE3?
The 'CA' suffix in MAPLAD36KP28CAE3 denotes bidirectional construction, meaning the device provides symmetrical clamping in both polarities - critical for protecting AC-coupled interfaces, differential buses, or floating power domains where voltage reversals occur during transients.
Can MAPLAD36KP28CAE3 be used in RTCA DO-160F Section 22 lightning testing?
Yes, MAPLAD36KP28CAE3 is specifically validated for RTCA DO-160F Section 22 multi-stroke lightning testing. It meets Level 4 for Waveform 4 (6.4/69 μs) and supports full certification when mounted per recommended pad layout and thermal interface - confirmed in Microsemi Application Note RF01216 Rev B.
MAPLAD36KP28CAE3 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):
- 28V
- Voltage - Breakdown (Min):
- 31.1V
- Voltage - Clamping (Max) @ Ipp:
- 46.4V
- Current - Peak Pulse (10/1000µs):
- 776A
- 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
MAPLAD36KP28CAE3 FAQ
1.How can I place an order for MAPLAD36KP28CAE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD36KP28CAE3 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 MAPLAD36KP28CAE3 reliable?
The price and inventory of MAPLAD36KP28CAE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD36KP28CAE3 is usually 5 days.
3.What payment methods are accepted for MAPLAD36KP28CAE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD36KP28CAE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD36KP28CAE3?
MAPLAD36KP28CAE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD36KP28CAE3 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 MAPLAD36KP28CAE3?
For technical support, including MAPLAD36KP28CAE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD36KP28CAE3 requirements.
6.How does Aetrix verify that MAPLAD36KP28CAE3 is sourced from the original manufacturer or authorized distributors?
All MAPLAD36KP28CAE3 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 MAPLAD36KP28CAE3 meets industry standards.
7.What is the process for return or replacement of MAPLAD36KP28CAE3?
All MAPLAD36KP28CAE3 units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD36KP28CAE3, 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 MAPLAD36KP28CAE3 part is unused and in its original packaging.
Return procedure for MAPLAD36KP28CAE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD36KP28CAE3 Tags
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