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Microchip Technology MAPLAD18KP9.0CA
- Part No.:
- MAPLAD18KP9.0CA
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD18KP9.0CA.pdf
- Description:
- TVS DIODE 9VWM 15.4VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:4,490
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Product details
Overview
MAPLAD18KP9.0CA from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace and automotive systems. It delivers 18,000 W peak pulse power at 10/1000 μs, features a 9.0 V reverse standoff voltage (VWM), clamps to ≤15.4 V at 1169 A peak impulse current (IPP), and meets RTCA DO-160F Waveform 4 Level 4 and IEC 61000-4-5 secondary lightning protection requirements.
For engineers reviewing the MAPLAD18KP9.0CA datasheet, MAPLAD18KP9.0CA pinout, MAPLAD18KP9.0CA application, or MAPLAD18KP9.0CA equivalent, this device is selected for high-reliability DC bus protection where multi-stroke lightning immunity, low thermal resistance (RθJC = 0.7 °C/W), and RoHS-compliant SMT mounting are critical design constraints.
Technical Context
The MAPLAD18KP9.0CA employs an avalanche diode structure optimized for fast response (<5 ns clamping time) and repeatable multi-pulse endurance under RTCA DO-160 Section 22 conditions. Its metal-base package enables direct thermal coupling to PCB copper or heatsinks, supporting sustained operation with junction-to-case thermal resistance of just 0.7 °C/W.
It is rated for bidirectional suppression with symmetric breakdown (V(BR) = 10.0–11.1 V @ I(BR)), operates across –55°C to +150°C, and complies with AEC-Q101 stress testing and MIL-PRF-19500 upscreening options. Standby leakage is limited to 60 μA at 9.0 V, ensuring minimal system power loss during normal operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 18,000 W @ 10/1000 μs - sustains aircraft-grade lightning surges without degradation |
| Reverse Standoff Voltage (VWM) | 9.0 V - maximum continuous DC operating voltage before clamping initiates |
| Breakdown Voltage (V(BR)) | 10.0–11.1 V @ I(BR) - ensures reliable avalanche conduction onset within defined tolerance |
| Clamping Voltage (VC) | ≤15.4 V @ IPP = 1169 A - limits downstream voltage stress to safe levels for 12 V systems |
| Peak Impulse Current (IPP) | 1169 A @ 10/1000 μs - quantifies maximum surge current handled at rated clamping voltage |
| Junction-to-Case Thermal Resistance | 0.7 °C/W - enables efficient heat transfer to PCB ground plane or heatsink |
| Standby Leakage (ID) | 60 μA @ VWM - negligible quiescent power draw in protected 9 V rail applications |
Pinout & Package
MAPLAD18KP9.0CA uses a surface-mount PLAD package with a metal base acting as the cathode terminal for bidirectional operation. The device has two terminals: anode and cathode, both accessible via solder pads on the top surface; the metal base serves as the common cathode connection point for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Top Pad) | Positive surge path input | Accepts transient energy from either polarity; forms one half of symmetrical clamping path |
| Cathode (Metal Base) | Common reference / heat sink interface | Provides low-inductance return path and primary thermal conduction route to PCB copper |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional suppression architecture | Enables single-device protection of AC-coupled or floating DC lines without polarity concerns |
| 0.7 °C/W RθJC thermal resistance | Reduces junction temperature rise by >70% vs. standard SMT TVS, extending multi-pulse lifetime |
| RTCA DO-160F Waveform 4 Level 4 compliance | Validated for pin-injection lightning transients (6.4/69 μs) in avionics equipment bays |
| IEC 61000-4-5 Class 4 support (42 Ω source) | Meets industrial and transportation surge immunity requirements without external impedance matching |
| MIL-PRF-19500 upscreening option | Supports high-reliability programs requiring lot traceability, burn-in, and parametric screening |
Applications
| Aerospace Avionics Power Bus | Automotive 12 V Load Dump Protection |
|---|---|
Use Scenario: Protection of flight control actuator power inputs against induced lightning currents per DO-160 Section 22. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector entry point to shunt surge energy before reaching DC-DC converters. Use Value: Limits transient voltage to ≤15.4 V, preserving 12 V-rated microcontrollers and motor drivers during multi-stroke events. |
Use Scenario: Safeguarding infotainment head unit power supply during alternator load dump events (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Primary overvoltage clamp mounted upstream of input filter capacitors to absorb 18 kW surge energy. Use Value: Prevents latch-up and gate oxide damage in PMICs by clamping within 5 ns and sustaining 1169 A peak current. |
| Railway Signaling DC Distribution | Industrial PLC I/O Module Protection |
Use Scenario: Secondary surge protection for 24 V signaling lines in train control cabinets exposed to track-induced transients. IC Role / Device Role / Timing Role: Bidirectional TVS installed on backplane connectors to suppress coupled EFT and lightning-induced surges. Use Value: Maintains signal integrity under IEC 61000-4-4 Level 4 (4 kV) and IEC 61000-4-5 Class 3 (1 kV) without derating. |
Use Scenario: Input protection for analog sensor channels in programmable logic controllers deployed in factory environments. IC Role / Device Role / Timing Role: Low-leakage (60 μA) TVS placed at terminal block entry to avoid DC offset errors in precision measurement circuits. Use Value: Enables <10 ppm baseline error contribution while delivering full 18 kW surge handling capability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0CA | Lower PPP (600 W), higher RθJA (50 °C/W), same VWM and bidirectional polarity | Suitable for consumer-grade or non-safety-critical 12 V lines; lacks DO-160/IEC 61000-4-5 validation | Select SMBJ9.0CA only when surge energy is limited to <100 J and thermal management is passive. |
| SMCJ9.0CA | PPP = 1500 W, RθJC ≈ 2.5 °C/W, same footprint but lower metal thermal mass | Validated for AEC-Q101 but not DO-160; used in automotive body electronics where multi-stroke testing is not required | Choose SMCJ9.0CA for cost-sensitive automotive modules needing basic ISO 7637-2 compliance without avionics certification. |
Compared with SMBJ9.0CA and SMCJ9.0CA, the MAPLAD18KP9.0CA provides 30× higher peak power handling, 3.6× better thermal conduction, and formal DO-160F/IEC 61000-4-5 test documentation-making it the sole choice for certified airborne and mission-critical transport systems.
Availability
MAPLAD18KP9.0CA is available at Aetrix Electronics and suitable for aerospace avionics, automotive safety-critical ECUs, and industrial railway signaling systems requiring stable component supply across extended product lifecycles.
Supply support for MAPLAD18KP9.0CA 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 MAPLAD18KP9.0CA belongs to Microsemi's high-power PLAD TVS family, engineered specifically for certified lightning protection in safety-critical platforms where multi-stroke endurance and thermal robustness are non-negotiable.
FAQ
What is the clamping voltage of MAPLAD18KP9.0CA at its rated peak impulse current?
The MAPLAD18KP9.0CA exhibits a maximum clamping voltage (VC) of 15.4 V when subjected to its rated peak impulse current of 1169 A under 10/1000 μs waveform conditions. This value is guaranteed per the manufacturer's electrical characteristics table and ensures compatibility with 12 V system components by limiting transient overvoltage exposure well below destructive thresholds.
Does MAPLAD18KP9.0CA meet RTCA DO-160F lightning protection requirements?
Yes, MAPLAD18KP9.0CA is explicitly validated for RTCA DO-160F Section 22 Waveform 4 (6.4/69 μs) at Level 4 and Waveform 5A (40/120 μs) at Level 4 up to 36 V variants. Its 18 kW rating and low clamping response enable compliance with multi-stroke lightning standards required for commercial and military avionics installations.
How does the metal base of MAPLAD18KP9.0CA function electrically and thermally?
The metal base of MAPLAD18KP9.0CA serves as the cathode terminal and primary thermal conduction path. Electrically, it completes the bidirectional clamping circuit; thermally, it provides a 0.7 °C/W junction-to-case resistance path to PCB copper or external heatsinks-enabling reliable dissipation of cumulative surge energy without thermal runaway.
Is MAPLAD18KP9.0CA RoHS compliant, and what marking indicates this?
Yes, MAPLAD18KP9.0CA is RoHS compliant, indicated by the "e3" suffix in its full part number designation (e.g., MAPLAD18KP9.0CA e3). This denotes annealed matte-tin plating per JEDEC/IPC standards and confirms absence of lead, cadmium, mercury, hexavalent chromium, PBB, and PBDE substances above regulated thresholds.
What is the standby leakage current of MAPLAD18KP9.0CA at its rated standoff voltage?
The MAPLAD18KP9.0CA specifies a maximum standby leakage current (ID) of 60 μA at its reverse standoff voltage of 9.0 V and 25°C ambient. This low leakage preserves battery life in always-on systems and avoids measurement errors in high-impedance sensor interfaces, making it suitable for precision 9 V rail protection.
MAPLAD18KP9.0CA 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):
- 9V
- Voltage - Breakdown (Min):
- 10V
- Voltage - Clamping (Max) @ Ipp:
- 15.4V
- Current - Peak Pulse (10/1000µs):
- 1169A (1.169kA)
- Power - Peak Pulse:
- 18000W (18kW)
- 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
MAPLAD18KP9.0CA FAQ
1.How can I place an order for MAPLAD18KP9.0CA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD18KP9.0CA 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 MAPLAD18KP9.0CA reliable?
The price and inventory of MAPLAD18KP9.0CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD18KP9.0CA is usually 5 days.
3.What payment methods are accepted for MAPLAD18KP9.0CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD18KP9.0CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD18KP9.0CA?
MAPLAD18KP9.0CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD18KP9.0CA 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 MAPLAD18KP9.0CA?
For technical support, including MAPLAD18KP9.0CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD18KP9.0CA requirements.
6.How does Aetrix verify that MAPLAD18KP9.0CA is sourced from the original manufacturer or authorized distributors?
All MAPLAD18KP9.0CA 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 MAPLAD18KP9.0CA meets industry standards.
7.What is the process for return or replacement of MAPLAD18KP9.0CA?
All MAPLAD18KP9.0CA units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD18KP9.0CA, 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 MAPLAD18KP9.0CA part is unused and in its original packaging.
Return procedure for MAPLAD18KP9.0CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD18KP9.0CA Tags
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