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Microchip Technology MAPLAD36KP22CA
- Part No.:
- MAPLAD36KP22CA
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD36KP22CA.pdf
- Description:
- TVS DIODE 22VWM 36.4VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:8,518
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Product details
Overview
MAPLAD36KP22CA 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 ≤36.4 V (max) under 990 A peak impulse current, and features 22 V reverse standoff voltage (VWM), 24.4–26.9 V breakdown voltage (V(BR)), and 1.0 °C/W junction-to-case thermal resistance - enabling robust secondary lightning protection per RTCA DO-160 Section 22 and IEC 61000-4-5.
For engineers reviewing the MAPLAD36KP22CA datasheet, MAPLAD36KP22CA pinout, MAPLAD36KP22CA application, or MAPLAD36KP22CA equivalent, this device is selected for high-reliability DC bus and signal line protection where multi-stroke lightning immunity, low-profile SMT mounting, and AEC-Q101 qualification are mandatory design requirements.
Technical Context
The MAPLAD36KP22CA operates as a bidirectional avalanche diode-based TVS, optimized for fast clamping response (<5 ns rise time) and low dynamic impedance to limit transient overvoltage across protected lines. Its thermally enhanced PLAD package integrates a metal baseplate for direct heat sinking, achieving RθJC = 1.0 °C/W and supporting sustained energy dissipation under repetitive surges at ≤0.05% duty factor.
It meets RTCA DO-160F Waveform 4 (6.4/69 μs) Level 4 and Waveform 5A (40/120 μs) Level 4 protection up to 78 V VWM variants, with MAPLAD36KP22CA specifically qualified for 22 V systems requiring bidirectional clamping and compliance with IEC 61000-4-2/4-4/4-5 and AEC-Q101 stress testing protocols.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 36,000 W @ 10/1000 μs - enables single-device protection against severe lightning-induced transients in aircraft avionics buses. |
| Reverse Standoff Voltage (VWM) | 22 V - sets maximum continuous operating voltage before clamping initiates; matches 24 V nominal DC systems with margin. |
| Breakdown Voltage (V(BR)) | 24.4–26.9 V @ 5 mA - defines precise avalanche onset threshold for predictable, repeatable clamping behavior. |
| Max Clamping Voltage (VC) | 36.4 V @ 990 A - limits protected circuit voltage during worst-case surge, preserving downstream 36 V-rated components. |
| Junction-to-Case Thermal Resistance | 1.0 °C/W - allows efficient heat transfer to PCB copper or external heatsink, critical for thermal stability under repeated surges. |
| Standby Current (ID) | 10 μA @ 22 V - ensures negligible leakage in standby, avoiding battery drain or signal integrity degradation in always-on systems. |
| Temperature Coefficient (αV(BR)) | +20 mV/°C - quantifies V(BR) drift with temperature, enabling accurate clamping margin calculation across -55°C to +150°C operation. |
Pinout & Package
The MAPLAD36KP22CA uses the PLAD (Plastic Leaded Anodeless Diode) surface-mount package: void-free UL94V-0 epoxy body (12.32 × 10.54 × 5.08 mm), tin-plated terminals, and metal baseplate acting as cathode for bidirectional operation. The device has two terminals - no polarity marking on bidirectional versions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode-side connection | One side of symmetrical avalanche junction; connects to line under protection (e.g., CAN_H or power rail). |
| Terminal 2 | Cathode-side connection / Metal baseplate | Common reference node; must be soldered to large copper pour or heatsink for thermal and electrical performance. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping architecture | Protects AC-coupled or differential signal lines (e.g., RS-485, CAN FD) without polarity constraints or external biasing. |
| AEC-Q101 qualified | Validated for automotive powertrain and chassis applications requiring zero defect rates and extended temperature cycling reliability. |
| RTCA DO-160 Section 22 compliance | Passes multi-stroke lightning test (Waveform 4 & 5A) - essential for FAA-certified avionics equipment installation. |
| Low-profile SMT package with metal baseplate | Enables high-power surge handling in space-constrained layouts while maintaining thermal path integrity via PCB copper area. |
| MIL-PRF-19500 upscreening option | Supports high-reliability programs (e.g., military comms, satellite subsystems) with lot traceability and 3σ screening on ID. |
Applications
| Aerospace Avionics Power Bus Protection | Automotive 24 V DC Distribution System |
|---|---|
Use Scenario: Protecting 28 V DC main bus in flight control computers against induced lightning transients per RTCA DO-160F Section 22. IC Role / Device Role / Timing Role: Bidirectional TVS diode providing sub-5 ns clamping response to limit bus voltage to ≤36.4 V during 10/1000 μs surges. Use Value: Prevents latch-up or burnout of downstream DC-DC converters and FPGAs by absorbing 36 kW peak energy without degradation over 1,000+ strokes. | Use Scenario: Safeguarding engine control unit (ECU) power inputs during load dump events (ISO 7637-2 Pulse 5a) in commercial trucks. IC Role / Device Role / Timing Role: Primary surge suppression element placed at ECU input filter stage, clamping transients before LC filtering. Use Value: Eliminates need for series resistors or additional TVS stages due to 990 A IPP rating and 1.0 °C/W thermal resistance enabling direct PCB heatsinking. |
| Industrial Ethernet PHY Interface Protection | Railway Signaling Data Line Protection |
Use Scenario: Securing RJ45 port PHY lines (e.g., 100BASE-TX) against EFT and ESD in factory automation gateways. IC Role / Device Role / Timing Role: Bidirectional TVS array element protecting differential pairs against common-mode surges per IEC 61000-4-4/4-2. Use Value: Maintains signal integrity up to 100 MHz with <0.5 pF junction capacitance (inferred from low VWM and fast response), avoiding data corruption. | Use Scenario: Shielding trackside signaling controllers connected to 75 Ω coaxial lines from induced surges during lightning strikes near rail corridors. IC Role / Device Role / Timing Role: Secondary lightning protector installed at cabinet entry point, meeting IEC 61000-4-5 Class 4 with 42 Ω source impedance. Use Value: Achieves Class 4 immunity (4 kV) without derating at full operating temperature (-40°C to +85°C), validated per AEC-Q101 temperature cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22CA | 600 W PPP rating, 22 V VWM, SMB package, RθJC ≈ 15 °C/W | Limited to single-stroke or low-duty-cycle surges; unsuitable for RTCA DO-160 multi-stroke validation. | Select SMBJ22CA only for cost-sensitive industrial controls with infrequent transients and no aviation certification requirements. |
| SMCJ22CA | 1500 W PPP rating, same VWM, SMC package, RθJC ≈ 3.5 °C/W | Cannot meet 36 kW surge requirement; requires parallel devices for equivalent energy handling, increasing layout area and parasitic inductance. | Choose SMCJ22CA when board space allows larger footprint and system-level testing confirms multi-device coordination is feasible. |
Compared with SMBJ22CA and SMCJ22CA, the MAPLAD36KP22CA delivers 24× and 24× higher peak pulse power respectively, with superior thermal management enabling certified multi-stroke lightning resilience - making it irreplaceable in safety-critical aerospace and heavy-duty automotive platforms where single-point failure is unacceptable.
Availability
MAPLAD36KP22CA is available at Aetrix Electronics and suitable for aerospace avionics, automotive ECU power distribution, and industrial Ethernet infrastructure requiring stable component supply, long-term lifecycle assurance, and certified surge immunity.
Supply support for MAPLAD36KP22CA 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 MAPLAD36KP22CA belongs to Microsemi's PLAD-series high-power TVS family, engineered specifically for certified lightning and load-dump protection in mission-critical systems where thermal robustness and multi-stroke endurance are non-negotiable.
FAQ
What is the maximum clamping voltage of the MAPLAD36KP22CA at its rated peak pulse current?
The MAPLAD36KP22CA exhibits a maximum clamping voltage (VC) of 36.4 V when subjected to its rated peak pulse current of 990 A under the standard 10/1000 μs waveform. This value is guaranteed across the full operating temperature range and forms the basis for downstream component voltage margining in designs such as 28 V avionics buses.
Is the MAPLAD36KP22CA compliant with automotive reliability standards?
Yes, the MAPLAD36KP22CA is tested and qualified to AEC-Q101 for stress testing including temperature cycling, humidity bias HAST, and mechanical shock. It supports automotive applications such as 24 V ECU power input protection where zero latent defects and operation from -55°C to +150°C junction temperature are required.
Does the MAPLAD36KP22CA require a heatsink for reliable operation?
The MAPLAD36KP22CA does not require an external heatsink but mandates a minimum 1.5 cm² copper pour connected to its metal baseplate for thermal conduction. Its 1.0 °C/W junction-to-case thermal resistance relies on PCB copper area - not ambient convection - so proper pad layout per Microsemi's recommended footprint is essential for sustaining repetitive surges.
How does the bidirectional construction of the MAPLAD36KP22CA affect its use in differential signal lines?
The bidirectional construction of the MAPLAD36KP22CA allows symmetric clamping of both positive and negative transients on differential pairs like RS-485 or CAN, eliminating the need for dual unidirectional devices or polarity-aware routing. Its matched avalanche characteristics ensure balanced common-mode suppression without introducing skew or DC offset.
Can the MAPLAD36KP22CA be used for primary lightning protection in outdoor telecom equipment?
No - the MAPLAD36KP22CA is specified for secondary lightning protection per IEC 61000-4-5 (e.g., inside equipment enclosures), not primary protection at service entrance points. For outdoor telecom, it must be deployed downstream of gas discharge tubes or spark gaps that handle the bulk energy; MAPLAD36KP22CA then provides fine-clamping to protect sensitive PHY ICs.
MAPLAD36KP22CA 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):
- 22V
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 36.4V
- Current - Peak Pulse (10/1000µs):
- 990A
- 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
MAPLAD36KP22CA FAQ
1.How can I place an order for MAPLAD36KP22CA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD36KP22CA 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 MAPLAD36KP22CA reliable?
The price and inventory of MAPLAD36KP22CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD36KP22CA is usually 5 days.
3.What payment methods are accepted for MAPLAD36KP22CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD36KP22CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD36KP22CA?
MAPLAD36KP22CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD36KP22CA 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 MAPLAD36KP22CA?
For technical support, including MAPLAD36KP22CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD36KP22CA requirements.
6.How does Aetrix verify that MAPLAD36KP22CA is sourced from the original manufacturer or authorized distributors?
All MAPLAD36KP22CA 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 MAPLAD36KP22CA meets industry standards.
7.What is the process for return or replacement of MAPLAD36KP22CA?
All MAPLAD36KP22CA units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD36KP22CA, 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 MAPLAD36KP22CA part is unused and in its original packaging.
Return procedure for MAPLAD36KP22CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD36KP22CA Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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onsemi
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Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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