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Microchip Technology MAPLAD18KP16CA
- Part No.:
- MAPLAD18KP16CA
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD18KP16CA.pdf
- Description:
- TVS DIODE 16VWM 26VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:5,617
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Product details
Overview
MAPLAD18KP16CA 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, clamps at ≤26.0 V under 693 A peak impulse current, and features a 16 V reverse standoff voltage (VWM) with ±5% breakdown tolerance (17.8–19.7 V). It is qualified to AEC-Q101 and meets RTCA DO-160F Level 4 pin injection for lightning protection in aircraft avionics.
For engineers reviewing the MAPLAD18KP16CA datasheet, MAPLAD18KP16CA pinout, MAPLAD18KP16CA application, or MAPLAD18KP16CA equivalent, key selection criteria include its bidirectional polarity, 16 V working voltage, 26.0 V max clamping at 693 A, thermal resistance of 0.7 °C/W junction-to-case, and compliance with IEC 61000-4-5 (Class 1–5, 42 Ω source) and MIL-PRF-19500 upscreening options.
Technical Context
The MAPLAD18KP16CA employs an avalanche diode structure optimized for low clamping ratio and fast response (<5 ns), enabling effective suppression of multi-stroke lightning transients per RTCA DO-160 Section 22. Its metal-base package provides direct thermal path to PCB heatsink, supporting sustained operation under repetitive surges at ≤0.05% duty factor.
It operates across –55°C to +150°C junction temperature range, with 50 °C/W junction-to-ambient thermal resistance on FR4 board using recommended pad layout. Standby leakage is limited to 10 μA at 16 V, and temperature coefficient of breakdown voltage is +16 mV/°C - critical for stable clamping performance over wide temperature excursions in engine bay or flight control electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 18,000 W @ 10/1000 μs - enables single-device protection against severe lightning-induced surges without cascaded stages |
| Reverse Standoff Voltage (VWM) | 16 V - matches nominal 12 V automotive or 15 V avionics bus systems while allowing margin for ripple and transients |
| Max Clamping Voltage (VC) | 26.0 V @ 693 A - ensures downstream ICs rated to 28 V or 30 V remain within absolute maximum ratings during surge |
| Breakdown Voltage (V(BR)) | 17.8–19.7 V @ I(BR) - tight 5% tolerance supports predictable turn-on timing and system-level coordination with upstream fuses |
| Junction-to-Case Thermal Resistance | 0.7 °C/W - allows efficient heat transfer to copper pour or heatsink, essential for multi-pulse reliability in load-dump scenarios |
| Leakage Current (ID) | 10 μA @ 16 V - negligible standby power loss in always-on vehicle subsystems such as CAN gateways or flight data recorders |
| Response Time | <5 ns - faster than typical MOVs or GDTs, preserving signal integrity in high-speed sensor interfaces and ARINC-429 lines |
Pinout & Package
MAPLAD18KP16CA uses a surface-mount plastic package with metal base (cathode side) for thermal conduction. Dimensions: 12.32 × 10.54 × 5.08 mm (L × W × H), weight ≈1 g. Recommended pad layout per RF01215 Rev B includes 12.32 mm × 10.54 mm thermal pad with solder mask defined openings.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Top Surface) | Transient current entry point (bidirectional) | Accepts positive or negative surge polarity; symmetric conduction enables single-device protection on AC-coupled or floating lines |
| Cathode (Metal Base) | Thermal and electrical return path | Directly soldered to large copper pour or heatsink; serves as primary thermal interface and low-inductance ground reference |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional construction (CA suffix) | Protects both polarities of differential or AC-coupled signals - eliminates need for dual unidirectional devices in RS-485, MIL-STD-1553, or analog sensor inputs |
| 18 kW peak pulse rating @ 10/1000 μs | Meets RTCA DO-160F Waveform 4 Level 4 (6.4/69 μs) and Waveform 5A Level 4 (40/120 μs) without derating at 25°C |
| 0.7 °C/W RθJC | Enables >1000 surge cycles at 0.05% duty factor when mounted on ≥2 oz copper with 500 mm² thermal pad - critical for repeated lightning strike testing |
| AEC-Q101 qualification | Validated for automotive under-hood applications including engine control modules and battery management systems exposed to load dump and ISO 7637-2 pulses |
| RoHS-compliant (e3 marking) | Matte-tin plating ensures compatibility with lead-free reflow profiles (260°C/10 s) and eliminates tin whisker risk in long-life avionics deployments |
Applications
| Avionics Lightning Protection | Automotive Load Dump Suppression |
|---|---|
Use Scenario: Protecting ARINC 429 data buses and pitot-static sensor interfaces in commercial aircraft against multi-stroke lightning events per DO-160 Section 22. IC Role / Device Role / Timing Role: Primary secondary surge protector placed at connector entry point, clamping transients before they reach line drivers and receivers. Use Value: MAPLAD18KP16CA's 26.0 V clamping at 693 A ensures ARINC 429 transceivers (rated to 36 V abs max) remain undamaged during 1000 A surge tests. | Use Scenario: Safeguarding 12 V power rails in engine control units (ECUs) during alternator load dump events per ISO 7637-2 Pulse 5a (110 V/400 ms). IC Role / Device Role / Timing Role: High-power TVS placed parallel to input filter capacitor, absorbing energy that exceeds MOV or fuse clearing capacity. Use Value: With 18,000 W rating and 0.7 °C/W RθJC, MAPLAD18KP16CA handles repeated 120 V/100 ms surges without thermal runaway in compact ECU enclosures. |
| Industrial Motor Drive I/O Protection | Railway Signaling Interface Protection |
Use Scenario: Shielding encoder feedback lines and analog current loops in variable-frequency drives from switching transients induced by IGBT commutation. IC Role / Device Role / Timing Role: Bidirectional TVS on differential encoder channels (A/B/Z), suppressing common-mode and differential-mode noise spikes up to 2 kV. Use Value: MAPLAD18KP16CA's <5 ns response and 26.0 V clamping prevent false edge detection in quadrature decoding circuits operating at >1 MHz. | Use Scenario: Protecting 70 V DC track signaling interfaces (e.g., ETCS Level 1 balises) from induced surges during nearby lightning strikes or traction current switching. IC Role / Device Role / Timing Role: Secondary protector downstream of gas discharge tube (GDT), limiting let-through voltage to safe levels for optocoupler isolators. Use Value: At 16 V VWM and 26.0 V VC, MAPLAD18KP16CA coordinates with upstream GDT to achieve <100 V total clamping - within EN 50121-3-2 immunity limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ16CA | 600 W rating (vs. 18,000 W); 28.5 V clamping @ 21.2 A; SMC package (smaller thermal mass) | Only suitable for low-energy ESD/EFT (IEC 61000-4-2/4-4), not lightning or load dump | Select SMBJ16CA only for board-level ESD protection on USB or GPIO; not a functional replacement for MAPLAD18KP16CA in high-energy applications. |
| SMCJ16CA | 1500 W rating (vs. 18,000 W); 26.0 V clamping @ 57.7 A; same SMC package footprint but lower PPP and thermal capability | Limited to single-stroke surges; cannot meet DO-160 multi-stroke requirements without derating | Use SMCJ16CA where space is constrained and surge energy is below 100 J; verify thermal design for repetitive events. |
Compared with SMBJ16CA and SMCJ16CA, MAPLAD18KP16CA offers 30× and 12× higher peak pulse power respectively, enabling single-device compliance with RTCA DO-160F Level 4 and ISO 7637-2 Pulse 5 - eliminating cascade designs and reducing BOM count in safety-critical systems.
Availability
MAPLAD18KP16CA is available at Aetrix Electronics and suitable for aerospace avionics, automotive powertrain ECUs, industrial motor drives, and railway signaling systems requiring stable component supply across extended product lifecycles.
Supply support for MAPLAD18KP16CA 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 components for aerospace, defense, and industrial markets.
The PLAD family - including MAPLAD18KP16CA - was engineered specifically for high-energy transient suppression in mission-critical platforms where failure is not an option, emphasizing thermal robustness, multi-stroke endurance, and qualification to AEC-Q101 and DO-160 standards.
FAQ
What is the clamping voltage of MAPLAD18KP16CA at its rated peak pulse current?
MAPLAD18KP16CA has a maximum clamping voltage (VC) of 26.0 V at 693 A peak pulse current (IPP) under 10/1000 μs waveform conditions. This value is guaranteed per the datasheet's Electrical Characteristics table and ensures protected circuits remain within safe operating voltage limits during high-energy transients.
Is MAPLAD18KP16CA suitable for automotive under-hood applications?
Yes, MAPLAD18KP16CA is AEC-Q101 qualified and rated for –55°C to +150°C junction temperature. Its 18,000 W surge capability, 0.7 °C/W thermal resistance, and low leakage (10 μA @ 16 V) make it suitable for engine control units, battery disconnect modules, and ADAS power supplies exposed to load dump and ISO 7637-2 pulses.
Does MAPLAD18KP16CA have RoHS-compliant packaging?
Yes, MAPLAD18KP16CA is offered in RoHS-compliant version marked with "e3" per part nomenclature. It features annealed matte-tin plating compatible with lead-free reflow profiles (260°C/10 s) and meets IPC/JEDEC J-STD-020B moisture sensitivity Level 1 - no dry pack required.
How does the metal base of MAPLAD18KP16CA function electrically and thermally?
The metal base of MAPLAD18KP16CA serves as the cathode terminal and primary thermal interface. Electrically, it provides low-inductance grounding for surge current return. Thermally, it conducts heat directly to the PCB copper pour or external heatsink, achieving 0.7 °C/W junction-to-case resistance - critical for multi-pulse reliability in lightning testing.
Can MAPLAD18KP16CA be used for bidirectional signal line protection?
Yes, the "CA" suffix confirms MAPLAD18KP16CA is bidirectional. It protects both polarities symmetrically, making it ideal for differential buses (e.g., RS-485, MIL-STD-1553), AC-coupled analog sensors, and floating power domains where polarity reversal may occur during fault conditions.
MAPLAD18KP16CA 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):
- 16V
- Voltage - Breakdown (Min):
- 17.8V
- Voltage - Clamping (Max) @ Ipp:
- 26V
- Current - Peak Pulse (10/1000µs):
- 693A
- 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
MAPLAD18KP16CA FAQ
1.How can I place an order for MAPLAD18KP16CA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD18KP16CA 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 MAPLAD18KP16CA reliable?
The price and inventory of MAPLAD18KP16CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD18KP16CA is usually 5 days.
3.What payment methods are accepted for MAPLAD18KP16CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD18KP16CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD18KP16CA?
MAPLAD18KP16CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD18KP16CA 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 MAPLAD18KP16CA?
For technical support, including MAPLAD18KP16CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD18KP16CA requirements.
6.How does Aetrix verify that MAPLAD18KP16CA is sourced from the original manufacturer or authorized distributors?
All MAPLAD18KP16CA 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 MAPLAD18KP16CA meets industry standards.
7.What is the process for return or replacement of MAPLAD18KP16CA?
All MAPLAD18KP16CA units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD18KP16CA, 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 MAPLAD18KP16CA part is unused and in its original packaging.
Return procedure for MAPLAD18KP16CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD18KP16CA Tags
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