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Microchip Technology MAPLAD36KP43CA
- Part No.:
- MAPLAD36KP43CA
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD36KP43CA.pdf
- Description:
- TVS DIODE 43VWM 69.4VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:7,566
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Product details
Overview
MAPLAD36KP43CA 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 ≤69.4 V under 519 A peak impulse current, and features a 43 V reverse standoff voltage (VWM), meeting RTCA DO-160 Section 22 multi-stroke lightning requirements.
For engineers reviewing the MAPLAD36KP43CA datasheet, MAPLAD36KP43CA pinout, MAPLAD36KP43CA application, or MAPLAD36KP43CA equivalent, this device is selected for secondary lightning protection per IEC 61000-4-5 (42 Ω, 12 Ω, 2 Ω source impedances), pin injection protection per RTCA/DO-160F Waveform 4 (Level 4 up to 400 V), and ESD/EFT immunity per IEC 61000-4-2/4-4.
Technical Context
The MAPLAD36KP43CA employs an avalanche diode structure optimized for low clamping ratio and minimal thermal resistance. Its metal-base cathode construction enables direct heatsinking, with RθJC = 1.0 °C/W and RθJA = 50 °C/W on FR4 board using recommended pad layout.
It supports bidirectional transient suppression without polarity sensitivity, operates across –55°C to +150°C junction temperature range, and meets AEC-Q101 stress testing requirements for automotive-grade reliability.
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) | 43 V - maximum continuous operating voltage before conduction begins |
| Breakdown Voltage (V(BR)) | 47.8–52.8 V @ 5 mA - ensures reliable turn-on margin above VWM |
| Max Clamping Voltage (VC) | 69.4 V @ 519 A - limits downstream circuit voltage during worst-case surge |
| Peak Pulse Current (IPP) | 519 A @ 10/1000 μs - defines maximum surge current it can shunt safely |
| Thermal Resistance (RθJC) | 1.0 °C/W - enables efficient heat transfer to heatsink or PCB copper |
| Standby Current (ID) | 10 μA @ 43 V - negligible leakage during normal operation |
Pinout & Package
MAPLAD36KP43CA uses a PLAD (Plastic Leaded Anode/Cathode) surface-mount package with metal base cathode terminal. The device has two terminals: anode (top-side metallization) and cathode (exposed metal base). Mounting requires thermal pad on PCB for heatsinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive surge path input | Connected to protected line; conducts during positive transients in bidirectional mode |
| Cathode | Common reference / heatsink interface | Exposed metal base serves as primary thermal path and circuit return; must be soldered to thermal pad |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional suppression | Protects AC or floating DC lines without polarity constraints; no external rectification needed |
| Low-profile SMT package | Height ≤ 0.210 in (5.33 mm); fits space-constrained avionics and engine control modules |
| RTCA DO-160F Waveform 4 compliance | Rated Level 4 up to 400 V standoff - validated for pin-injection lightning simulation in aircraft wiring |
| MIL-PRF-19500 upscreening option | Available with screening levels M, MA, MX, MXL for extended reliability in mission-critical systems |
| Moisture Sensitivity Level 1 | No dry pack or baking required before reflow - simplifies manufacturing and reduces handling cost |
Applications
| Aircraft Avionics Power Distribution | Automotive Engine Control Unit (ECU) |
|---|---|
Use Scenario: Protecting 28 V DC power inputs of flight management computers against induced lightning surges per RTCA DO-160 Section 22. IC Role / Device Role / Timing Role: Primary transient shunt element placed at board-level input filter stage. Use Value: Limits clamped voltage to ≤69.4 V during 36 kW surges, preserving downstream DC-DC converters rated for 75 V absolute max. | Use Scenario: Safeguarding CAN bus power rails and sensor supply lines in diesel engine ECUs exposed to load dump events. IC Role / Device Role / Timing Role: Secondary surge protector downstream of main alternator clamp, absorbing residual energy after primary suppression. Use Value: Withstands 519 A peak current at 10/1000 μs, enabling compliance with ISO 7637-2 Pulse 5a/b without derating. |
| Industrial Motor Drive Control Boards | Railway Signaling Interface Modules |
Use Scenario: Shielding isolated gate driver supplies from switching transients generated by IGBTs in variable-frequency drives. IC Role / Device Role / Timing Role: Fast-response TVS placed adjacent to isolated DC-DC converter outputs. Use Value: Sub-100 ps response time ensures clamping initiates before transient propagates into sensitive logic, reducing fault-induced resets. | Use Scenario: Securing Ethernet PHY power and data lines in wayside signaling units subjected to induced surges from nearby traction currents. IC Role / Device Role / Timing Role: Bidirectional protector on 48 V DC input and PoE auxiliary rails. Use Value: Dual-voltage rating (43 V VWM + 69.4 V VC) provides 26.4 V design margin over nominal 48 V rail, accommodating brownout and ripple. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43CA | 600 W PPP rating, 5.0 mm × 3.5 mm SMB package, RθJC ≈ 35 °C/W | Lower energy handling; suitable only for sub-system level or secondary protection | Select when system-level surge exposure is limited to IEC 61000-4-5 Class 2/3 and board space is constrained |
| SMCJ43CA | 1500 W PPP rating, 7.2 mm × 6.2 mm SMC package, RθJC ≈ 15 °C/W | Mid-tier energy capacity; lacks RTCA DO-160F Waveform 4 Level 4 validation | Choose for industrial motor drives where MIL/AEC qualification is not mandated but higher surge margin than SMBJ is required |
Compared with SMBJ43CA and SMCJ43CA, the MAPLAD36KP43CA delivers 24× and 24× higher peak pulse power respectively, supports certified aircraft lightning testing, and provides superior thermal performance via metal-base mounting-making it irreplaceable in primary surge protection roles for aerospace and high-reliability automotive platforms.
Availability
MAPLAD36KP43CA is available at Aetrix Electronics and suitable for aircraft avionics, automotive ECU power systems, and industrial motor drive control boards requiring stable component supply across extended product lifecycles.
Supply support for MAPLAD36KP43CA 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 robust discrete components.
The MAPLAD36KP43CA belongs to Microsemi's PLAD-series high-power TVS family, engineered specifically for certified lightning and load-dump protection in safety-critical airborne and vehicular systems.
FAQ
What is the clamping voltage specification for MAPLAD36KP43CA under standard test conditions?
The MAPLAD36KP43CA has a maximum clamping voltage (VC) of 69.4 V at 519 A peak pulse current under 10/1000 μs waveform conditions. This value is measured at 25°C ambient and reflects worst-case voltage seen by downstream circuitry during full-rated surge events. The clamping voltage remains stable across its operating temperature range due to low αV(BR) of 50 mV/°C.
Does MAPLAD36KP43CA meet RTCA DO-160F lightning test requirements?
Yes, MAPLAD36KP43CA is validated for RTCA DO-160F Section 22 multi-stroke lightning testing and specifically rated for Pin Injection Protection (Waveform 4) at Level 4 up to 400 V standoff. Its 36 kW PPP rating and low clamping ratio enable compliance with both short- and long-distance lightning coupling scenarios defined in the standard.
How is thermal management implemented for MAPLAD36KP43CA in PCB layout?
MAPLAD36KP43CA requires direct thermal connection of its exposed metal cathode base to a large copper pour or heatsink. The datasheet specifies RθJC = 1.0 °C/W and recommends a specific pad layout (0.470″ × 0.230″) on FR4. Without proper thermal anchoring, steady-state power dissipation is limited to 2.5 W at 25°C ambient, far below its 36 kW pulse capability.
Is MAPLAD36KP43CA RoHS compliant and what is its moisture sensitivity level?
Yes, MAPLAD36KP43CA is RoHS compliant (e3 marking) and classified as Moisture Sensitivity Level 1 per IPC/JEDEC J-STD-020B. No dry packing or baking is required prior to reflow soldering, simplifying assembly and eliminating moisture-related popcorning risks during manufacturing.
What is the difference between MAPLAD36KP43CA and unidirectional MAPLAD36KP43A?
The MAPLAD36KP43CA is bidirectional, providing symmetrical clamping for both positive and negative transients, while MAPLAD36KP43A is unidirectional and conducts only during positive surges relative to its cathode. The CA suffix denotes bidirectional construction, critical for protecting AC-coupled or floating DC interfaces where polarity reversal may occur during surge events.
MAPLAD36KP43CA 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):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 69.4V
- Current - Peak Pulse (10/1000µs):
- 519A
- 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
MAPLAD36KP43CA FAQ
1.How can I place an order for MAPLAD36KP43CA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD36KP43CA 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 MAPLAD36KP43CA reliable?
The price and inventory of MAPLAD36KP43CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD36KP43CA is usually 5 days.
3.What payment methods are accepted for MAPLAD36KP43CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD36KP43CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD36KP43CA?
MAPLAD36KP43CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD36KP43CA 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 MAPLAD36KP43CA?
For technical support, including MAPLAD36KP43CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD36KP43CA requirements.
6.How does Aetrix verify that MAPLAD36KP43CA is sourced from the original manufacturer or authorized distributors?
All MAPLAD36KP43CA 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 MAPLAD36KP43CA meets industry standards.
7.What is the process for return or replacement of MAPLAD36KP43CA?
All MAPLAD36KP43CA units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD36KP43CA, 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 MAPLAD36KP43CA part is unused and in its original packaging.
Return procedure for MAPLAD36KP43CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD36KP43CA 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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Diodes Incorporated
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Diodes Incorporated
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onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
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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