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Microchip Technology MAPLAD18KP17CA
- Part No.:
- MAPLAD18KP17CA
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD18KP17CA.pdf
- Description:
- TVS DIODE 17VWM 27.6VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:7,137
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Product details
Overview
MAPLAD18KP17CA from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace, automotive, and industrial systems. It delivers 18,000 W peak pulse power at 10/1000 μs, clamps at ≤27.6 V under 653 A peak impulse current, and features a 17 V reverse standoff voltage (VWM) with ±5% breakdown tolerance (18.9–20.9 V). It meets RTCA DO-160F Level 4 pin injection (Waveform 4) and IEC 61000-4-5 Class 1–5 secondary lightning protection.
For engineers reviewing the MAPLAD18KP17CA datasheet, MAPLAD18KP17CA pinout, MAPLAD18KP17CA application, or MAPLAD18KP17CA 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 packaging are critical - especially in avionics power distribution, vehicle ECU inputs, and industrial motor drive control interfaces.
Technical Context
The MAPLAD18KP17CA employs an avalanche diode structure optimized for fast response (<5 ns clamping time) and high cumulative energy handling. Its metal-base package enables direct thermal coupling to heatsinks, supporting sustained operation under repetitive transients at ≤0.05% duty factor. The bidirectional construction ensures symmetrical clamping for AC-coupled or floating signal lines.
It is characterized per IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and IEC 61000-4-5 (lightning) with 42 Ω, 12 Ω, and 2 Ω source impedances - validated for Class 2–5 compliance depending on impedance. Standby leakage (ID ≤10 μA @ 17 V) and temperature coefficient (αV(BR) = 18 mV/°C) are tightly controlled via 3σ lot norm screening.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 18,000 W @ 10/1000 μs - sustains full-rated surge without degradation under single-event or low-duty-cycle multi-stroke conditions |
| Reverse Standoff Voltage (VWM) | 17 V - maximum continuous DC or peak AC voltage the device blocks without conduction; matches 15–16 V nominal DC bus systems |
| Breakdown Voltage (V(BR)) | 18.9–20.9 V @ I(BR) - guaranteed avalanche initiation range; ensures predictable turn-on margin above VWM |
| Max Clamping Voltage (VC) | 27.6 V @ 653 A - limits downstream voltage stress during worst-case surge; enables use with 30 V-rated ICs |
| Junction-to-Case Thermal Resistance | 0.7 °C/W - enables efficient heat transfer to PCB copper or external heatsink; critical for thermal stability in sealed enclosures |
| Clamping Response Time | <5 ns - suppresses fast-rising transients before sensitive circuitry responds; essential for DO-160F Waveform 4 compliance |
| Standby Leakage Current | ≤10 μA @ 17 V - negligible power loss in always-on systems; avoids battery drain in automotive standby modes |
Pinout & Package
MAPLAD18KP17CA uses a proprietary surface-mount plastic package with metal baseplate (cathode-connected) for low-inductance, high-current surge conduction and thermal dissipation. Dimensions: 12.32 × 10.54 × 5.08 mm (L × W × H), weight ≈1 g. Recommended pad layout per RF01215 Rev B supports optimal solder joint reliability and thermal spreading.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Metal Baseplate (Bottom) | Cathode (Bidirectional Common Terminal) | Provides low-inductance return path for both polarities; must be soldered to large copper pour or heatsink for RθJC = 0.7 °C/W |
| Top Surface Pad | Anode (Bidirectional Common Terminal) | Completes symmetrical conduction path; connects to protected line (e.g., CAN_H/CAN_L pair or AC signal line) |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional 18 kW surge rating | Enables single-device protection of AC-coupled or differential interfaces (e.g., RS-485, CAN, Ethernet PHY) without polarity concerns |
| RTCA DO-160F Level 4 pin injection compliance | Validated for aircraft wiring harness protection against induced transients up to 6.4/69 μs waveform at 25°C |
| IEC 61000-4-5 Class 1–5 secondary lightning protection | Supports system-level certification across multiple source impedances (2–42 Ω), reducing need for additional staged protection |
| RoHS-compliant (e3) matte-tin plating | Ensures reliable solderability per MIL-STD-750 Method 2026 and compatibility with lead-free reflow profiles (260°C/10s) |
| Moisture Sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints - simplifies SMT line logistics and inventory management |
Applications
| Aerospace Power Distribution | Automotive Load Dump Protection |
|---|---|
|
Use Scenario: Protection of 28 V DC distribution buses in commercial aircraft avionics bays exposed to lightning-induced surges per DO-160 Section 22. IC Role / Device Role / Timing Role: Primary surge shunt device placed at bus entry point; clamps transients before they reach upstream DC-DC converters and flight control microcontrollers. Use Value: Enables compliance with RTCA DO-160F Waveform 4 (Level 4) and multi-stroke endurance testing without derating - eliminating need for parallel TVS arrays. |
Use Scenario: Input protection for engine control units (ECUs) subjected to ISO 7637-2 Load Dump pulses (up to 120 V, 400 ms) during alternator disconnection. IC Role / Device Role / Timing Role: Bidirectional clamp across battery-supplied rails; absorbs energy while limiting voltage to ≤27.6 V to protect 30 V-rated power management ICs. Use Value: Replaces bulkier through-hole alternatives with equivalent 18 kW rating in footprint <130 mm² - enabling compact ECU designs meeting AEC-Q101 reliability requirements. |
| Industrial Motor Drive Control | Telecom DC Feeder Protection |
|
Use Scenario: Surge suppression on 24 V control signal lines interfacing PLC outputs to variable frequency drives (VFDs) in factory automation environments. IC Role / Device Role / Timing Role: Transient limiter on isolated digital I/O lines; prevents false triggering or latch-up caused by inductive kickback or ground bounce. Use Value: Sub-5 ns response ensures clamping occurs before microsecond-scale logic propagation delays - maintaining deterministic system behavior during EMC events. |
Use Scenario: Secondary protection on -48 V DC telecom feeder lines entering remote radio units (RRUs), where primary protection resides at the cabinet entrance. IC Role / Device Role / Timing Role: Final-stage TVS on board-level power input; handles residual surges passing through upstream modules and meets IEC 61000-4-5 Class 4 (42 Ω source). Use Value: Delivers 18 kW pulse handling in SMT form factor - allowing board-level compliance without redesigning chassis-level protection architecture. |
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 SMAJ17CA | 700 W PPP rating (vs. 18,000 W); DO-214AC package; 17 V VWM; unidirectional/bidirectional variants available | Rated for consumer/industrial grade only; not qualified to DO-160 or AEC-Q101; limited to single-stroke or low-energy events | Select when cost sensitivity outweighs multi-stroke robustness and aerospace qualification requirements |
| Vishay SM8S17CA | 6,600 W PPP rating (vs. 18,000 W); SMB package; 17 V VWM; AEC-Q101 qualified; DO-160 tested but not Level 4 certified | Validated for automotive load dump and IEC 61000-4-5 Class 3–4; lacks DO-160F Waveform 4 Level 4 validation and 18 kW multi-stroke capability | Select for AEC-Q101-compliant automotive ECUs where DO-160F Level 4 is not mandated |
Compared with SMAJ17CA and SM8S17CA, MAPLAD18KP17CA provides >2.7× higher peak pulse power and formal DO-160F Level 4 certification - making it the only option for avionics-grade pin injection immunity and multi-stroke lightning resilience in sealed, thermally constrained environments.
Availability
MAPLAD18KP17CA is available at Aetrix Electronics and suitable for aerospace power distribution, automotive ECU protection, and industrial motor drive control requiring stable component supply, long-term lifecycle support, and traceable high-reliability sourcing.
Supply support for MAPLAD18KP17CA 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 solutions for aerospace, defense, and industrial markets.
The PLAD family was engineered for ultra-high-power transient suppression in space-constrained, mission-critical platforms - prioritizing thermal efficiency, multi-stroke endurance, and regulatory compliance over cost or general-purpose use.
FAQ
What is the maximum clamping voltage of MAPLAD18KP17CA at its rated peak pulse current?
The MAPLAD18KP17CA has a maximum clamping voltage (VC) of 27.6 V at 653 A peak pulse current (IPP) under 10/1000 μs waveform conditions. This value is guaranteed per datasheet Figure 3 and ensures downstream components rated for ≤30 V operation remain within safe voltage margins during surge events.
Is MAPLAD18KP17CA qualified for automotive applications per AEC-Q101?
Yes, MAPLAD18KP17CA is tested in accordance with AEC-Q101 requirements as stated in the RF01215 datasheet. It undergoes stress testing including temperature cycling, highly accelerated life testing (HALT), and surge validation - confirming suitability for under-hood and powertrain ECU applications.
Does MAPLAD18KP17CA require moisture-sensitive handling or dry packing?
No, MAPLAD18KP17CA has IPC/JEDEC J-STD-020B Moisture Sensitivity Level 1 rating. It does not require dry pack, baking, or floor-life controls - enabling direct placement from tape-and-reel without preconditioning, simplifying SMT manufacturing flow.
How is thermal management implemented for MAPLAD18KP17CA in high-power surge scenarios?
MAPLAD18KP17CA achieves RθJC = 0.7 °C/W via its metal baseplate, which must be soldered to a minimum 10 cm² copper area or external heatsink. This design allows junction temperature rise of only ~455°C per 18 kW pulse - validated for ≤0.05% duty cycle per RF01215 Figure 2.
Can MAPLAD18KP17CA be used for both AC and DC line protection?
Yes, MAPLAD18KP17CA is bidirectional and symmetrically rated - making it suitable for AC signal lines (e.g., RS-485, CAN bus), DC power rails (e.g., 24/28 V systems), and floating differential pairs. Its 17 V VWM and 27.6 V VC ensure safe operation across both polarities without polarity-dependent derating.
MAPLAD18KP17CA 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):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 27.6V
- Current - Peak Pulse (10/1000µs):
- 653A
- 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
MAPLAD18KP17CA FAQ
1.How can I place an order for MAPLAD18KP17CA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD18KP17CA 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 MAPLAD18KP17CA reliable?
The price and inventory of MAPLAD18KP17CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD18KP17CA is usually 5 days.
3.What payment methods are accepted for MAPLAD18KP17CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD18KP17CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD18KP17CA?
MAPLAD18KP17CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD18KP17CA 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 MAPLAD18KP17CA?
For technical support, including MAPLAD18KP17CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD18KP17CA requirements.
6.How does Aetrix verify that MAPLAD18KP17CA is sourced from the original manufacturer or authorized distributors?
All MAPLAD18KP17CA 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 MAPLAD18KP17CA meets industry standards.
7.What is the process for return or replacement of MAPLAD18KP17CA?
All MAPLAD18KP17CA units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD18KP17CA, 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 MAPLAD18KP17CA part is unused and in its original packaging.
Return procedure for MAPLAD18KP17CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD18KP17CA Tags
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