My Inquiry
My Account
Microchip Technology MAPLAD18KP7.5CAE3
- Part No.:
- MAPLAD18KP7.5CAE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD18KP7.5CAE3.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:2,077
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAPLAD18KP7.5CAE3 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 7.5 V reverse standoff voltage (VWM), clamps to ≤12.9 V at 1396 A peak current, and meets RTCA DO-160 Section 22 multi-stroke lightning requirements.
For engineers reviewing the MAPLAD18KP7.5CAE3 datasheet, MAPLAD18KP7.5CAE3 pinout, MAPLAD18KP7.5CAE3 application, or MAPLAD18KP7.5CAE3 equivalent, key selection criteria include bidirectional polarity, 12.9 V clamping voltage at 1396 A, 0.7 °C/W junction-to-case thermal resistance, RoHS-compliant e3 plating, and qualification per AEC-Q101 and MIL-PRF-19500 screening options.
Technical Context
This TVS diode employs an avalanche breakdown structure optimized for fast response (<5 ns clamping time) and low dynamic impedance under high-current transients. Its metal-base package enables direct thermal coupling to PCB copper or heatsinks, supporting sustained energy dissipation with RθJC = 0.7 °C/W.
It is validated for secondary lightning protection per IEC 61000-4-5 at 42 Ω, 12 Ω, and 2 Ω source impedances (Classes 1–5 depending on VWM), and provides pin-injection immunity per RTCA/DO-160F Waveform 4 (Level 4) and Waveform 5A (Level 4 up to 36 V variants).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous DC or peak AC voltage the device blocks without conduction |
| V(BR) min/max | 8.33–9.21 V - Breakdown occurs within this range at I(BR) = 5 mA, defining turn-on threshold |
| VC @ IPP | 12.9 V - Clamping voltage measured at 1396 A peak pulse, limiting downstream voltage stress |
| PPP | 18,000 W - Peak pulse power handling at 10/1000 μs waveform, enabling single-event lightning strike suppression |
| RθJC | 0.7 °C/W - Low thermal resistance from junction to case, allowing efficient heat transfer to PCB or heatsink |
| ID @ VWM | 750 μA - Max standby leakage at rated standoff, minimizing quiescent power loss in battery-critical systems |
| αV(BR) | 6.0 mV/°C - Temperature coefficient of breakdown voltage, enabling predictable derating over -55°C to +150°C |
Pinout & Package
The MAPLAD18KP7.5CAE3 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 bottom metal surface and top metallization.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive surge path input | Serves as one conduction path during positive transients; tied to system ground or reference plane in typical clamping configuration |
| Cathode | Negative surge path input / Metal base | Functions as second conduction path during negative transients; provides primary thermal interface to PCB copper pour or heatsink |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Protects AC-coupled or floating signal lines from ± polarity surges without polarity-sensitive placement |
| 18 kW peak pulse rating | Withstands multi-stroke lightning events per RTCA DO-160 Section 22 without degradation |
| 0.7 °C/W RθJC | Enables >70 W steady-state power dissipation when mounted on 10 cm² 2-oz copper with thermal vias |
| AEC-Q101 qualified | Validated for automotive under-hood applications including load dump and alternator ripple suppression |
| e3 RoHS-compliant plating | Matte-tin termination compatible with lead-free reflow profiles up to 260°C for 10 seconds |
Applications
| Aerospace Avionics Power Input | Automotive Engine Control Unit (ECU) |
|---|---|
Use Scenario: Protection of 28 V DC aircraft bus inputs against lightning-induced surges per RTCA DO-160F Section 22. IC Role / Device Role / Timing Role: Primary transient voltage suppressor placed at board-level power entry point before DC-DC converters. Use Value: Clamps 1396 A transients to ≤12.9 V, preventing damage to downstream regulators and microcontrollers rated for <16 V absolute max. | Use Scenario: Load dump suppression on 12 V engine control module power rail during alternator field cutoff. IC Role / Device Role / Timing Role: Bidirectional TVS shunting surge energy directly to chassis ground during ISO 7637-2 Pulse 5a events. Use Value: Handles 18,000 W pulses without failure, maintaining system uptime where single-event hard failures are unacceptable. |
| Industrial Motor Drive Gate Driver Supply | Railway Signaling Interface |
Use Scenario: Protecting isolated gate driver bias supplies from switching-induced transients in IGBT inverters. IC Role / Device Role / Timing Role: Secondary protection stage after primary LC filtering, clamping fast-rising dv/dt spikes. Use Value: Sub-5 ns response ensures clamping occurs before gate oxide breakdown thresholds are exceeded in SiC MOSFET drivers. | Use Scenario: Surge protection on 75 Ω coaxial data lines connecting trackside signaling units to central control. IC Role / Device Role / Timing Role: Bidirectional TVS placed differential-mode across signal pair to suppress common-mode lightning coupling. Use Value: 7.5 V VWM matches nominal signaling voltage, while 12.9 V VC preserves receiver input integrity during IEC 61000-4-5 Class 4 tests. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.5CA | 600 W PPP rating, 100 A IPP, SMC package, RθJC ≈ 15 °C/W | Lower energy handling; suitable only for IEC 61000-4-2/4-4, not DO-160 or IEC 61000-4-5 Level 4+ | Select SMBJ7.5CA only for cost-sensitive consumer-grade designs with sub-1 kA threat levels. |
| SMCJ7.5CA | 1500 W PPP rating, 216 A IPP, SMC package, RθJC ≈ 12 °C/W | Lacks AEC-Q101 qualification and DO-160 validation; limited to industrial non-safety-critical use | Choose SMCJ7.5CA for general-purpose industrial boards where full aerospace/automotive certification is not required. |
Compared with SMBJ7.5CA and SMCJ7.5CA, MAPLAD18KP7.5CAE3 delivers 30× higher peak power, 6.5× greater peak current, and certified compliance with RTCA DO-160F and AEC-Q101-making it the sole option for certified airborne and safety-critical automotive power protection.
Availability
MAPLAD18KP7.5CAE3 is available at Aetrix Electronics and suitable for aerospace avionics, automotive ECU power systems, and industrial motor drive designs requiring stable component supply across extended product lifecycles.
Supply support for MAPLAD18KP7.5CAE3 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 RF solutions for aerospace, defense, and industrial markets.
The MAPLAD18KP7.5CAE3 belongs to Microsemi's high-power PLAD TVS family, engineered specifically for certified lightning and load-dump protection in mission-critical platforms where failure is not an option.
FAQ
What is the clamping voltage of MAPLAD18KP7.5CAE3 at its rated peak pulse current?
The MAPLAD18KP7.5CAE3 exhibits a maximum clamping voltage (VC) of 12.9 V when subjected to its rated peak pulse current of 1396 A under 10/1000 μs waveform conditions. This value is guaranteed per the manufacturer's electrical characteristics table and defines the upper voltage limit imposed on protected circuitry during surge events.
Is MAPLAD18KP7.5CAE3 qualified for automotive applications?
Yes, MAPLAD18KP7.5CAE3 is qualified per AEC-Q101 for automotive use and is explicitly validated for load dump protection in engine control units. Its bidirectional construction, 18 kW pulse rating, and thermal performance make it suitable for under-hood environments operating from –55°C to +150°C.
Does MAPLAD18KP7.5CAE3 meet RTCA DO-160 lightning standards?
Yes, MAPLAD18KP7.5CAE3 is designed and tested to meet RTCA DO-160F Section 22 for multi-stroke lightning, including Waveform 4 (6.4/69 μs) Level 4 and Waveform 5A (40/120 μs) Level 4 compliance for 7.0–36 V variants. Its 18,000 W rating directly supports this requirement.
What is the thermal resistance from junction to case for MAPLAD18KP7.5CAE3?
The junction-to-case thermal resistance (RθJC) of MAPLAD18KP7.5CAE3 is 0.7 °C/W, measured under standard test conditions. This low value enables effective heat transfer from the silicon die to the metal base, supporting high-reliability operation when mounted on thermally enhanced PCB layouts or heatsinks.
How does the "CA" suffix in MAPLAD18KP7.5CAE3 indicate device polarity?
The "CA" suffix in MAPLAD18KP7.5CAE3 denotes bidirectional construction, meaning the device provides symmetrical clamping for both positive and negative transients. Unlike unidirectional "A" variants, MAPLAD18KP7.5CAE3 has no anode/cathode orientation dependency in layout and protects AC or floating circuits without polarity concerns.
MAPLAD18KP7.5CAE3 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):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 12.9V
- Current - Peak Pulse (10/1000µs):
- 1396A (1.396kA)
- 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
MAPLAD18KP7.5CAE3 FAQ
1.How can I place an order for MAPLAD18KP7.5CAE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD18KP7.5CAE3 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 MAPLAD18KP7.5CAE3 reliable?
The price and inventory of MAPLAD18KP7.5CAE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD18KP7.5CAE3 is usually 5 days.
3.What payment methods are accepted for MAPLAD18KP7.5CAE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD18KP7.5CAE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD18KP7.5CAE3?
MAPLAD18KP7.5CAE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD18KP7.5CAE3 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 MAPLAD18KP7.5CAE3?
For technical support, including MAPLAD18KP7.5CAE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD18KP7.5CAE3 requirements.
6.How does Aetrix verify that MAPLAD18KP7.5CAE3 is sourced from the original manufacturer or authorized distributors?
All MAPLAD18KP7.5CAE3 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 MAPLAD18KP7.5CAE3 meets industry standards.
7.What is the process for return or replacement of MAPLAD18KP7.5CAE3?
All MAPLAD18KP7.5CAE3 units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD18KP7.5CAE3, 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 MAPLAD18KP7.5CAE3 part is unused and in its original packaging.
Return procedure for MAPLAD18KP7.5CAE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD18KP7.5CAE3 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
