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Microchip Technology MAPLAD18KP7.5CA
- Part No.:
- MAPLAD18KP7.5CA
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD18KP7.5CA.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:6,288
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Product details
Overview
MAPLAD18KP7.5CA 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 ≤12.9 V under 1396 A peak impulse current, and features a 7.5 V reverse standoff voltage (VWM) with ±5% breakdown tolerance (8.33–9.21 V). It is qualified to AEC-Q101 and meets RTCA DO-160F Waveform 4 Level 4 and IEC 61000-4-5 secondary lightning protection requirements.
For engineers reviewing the MAPLAD18KP7.5CA datasheet, MAPLAD18KP7.5CA pinout, MAPLAD18KP7.5CA application, or MAPLAD18KP7.5CA equivalent, key selection criteria include its bidirectional polarity, low thermal resistance (RθJC = 0.7 °C/W), RoHS-compliant e3 plating, 12.9 V clamping voltage at 1396 A, and suitability for aircraft lightning protection per DO-160 Section 22.
Technical Context
The MAPLAD18KP7.5CA employs an avalanche diode structure optimized for multi-stroke lightning transients, with fast response time (<5 ns) and low clamping ratio (VC/V(BR) ≈ 1.55). Its metal-base package enables direct thermal coupling to heatsinks, supporting sustained energy dissipation under 0.05% duty cycle impulses.
It operates across –55°C to +150°C junction temperature range and complies with IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and IEC 61000-4-5 (lightning) standards using 2 Ω, 12 Ω, and 42 Ω source impedances-enabling Class 2–5 protection depending on test configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 μs) | 18,000 W - sustains full-rated surge without failure under standardized lightning waveform |
| Reverse Standoff Voltage (VWM) | 7.5 V - maximum continuous DC or peak AC voltage before conduction begins |
| Breakdown Voltage (V(BR)) | 8.33–9.21 V @ I(BR) - ensures reliable turn-on margin above VWM for robust overvoltage detection |
| Clamping Voltage (VC) | ≤12.9 V @ 1396 A - limits downstream circuit voltage during worst-case surge event |
| Junction-to-Case Thermal Resistance | 0.7 °C/W - enables efficient heat transfer to PCB copper or external heatsink |
| Moisture Sensitivity Level | Level 1 per J-STD-020B - no dry pack required, supports standard SMT reflow |
| RoHS Compliance | e3 matte-tin plating - lead-free, solderable per MIL-STD-750 Method 2026 |
Pinout & Package
MAPLAD18KP7.5CA uses a surface-mount PLAD package with two terminals: anode and cathode. The metal base serves as the cathode terminal (per datasheet note: "The cathode is the metal base under the body of this device"). This design enables low-inductance, high-current surge path and direct thermal conduction to PCB ground plane or heatsink.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Metal Base (Bottom Surface) | Cathode | Primary current return path and thermal interface; must be soldered to large copper area for optimal clamping performance |
| Top Surface Terminal | Anode | Input connection point for protected line; low-inductance layout minimizes voltage overshoot during fast transients |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional Surge Suppression | Protects AC or differential signal lines against positive and negative polarity transients without polarity-sensitive placement |
| DO-160F Waveform 4 Level 4 Compliance | Withstands 6.4/69 μs pin-injection surges up to 7.5 V VWM devices - validated for aircraft avionics interfaces |
| AEC-Q101 Qualification | Qualified for automotive underhood and powertrain applications requiring high-reliability discrete protection |
| Low RθJC (0.7 °C/W) | Enables >90% of surge energy to dissipate through case rather than ambient air - critical for repeated stroke endurance |
| 100% Surge Tested | Each production lot undergoes 1000 A impulse screening - ensures zero latent defects in field-deployed units |
Applications
| Aircraft Avionics Power Input | Automotive Load Dump Protection |
|---|---|
Use Scenario: 28 V DC power input to flight control computers subjected to DO-160 Section 22 lightning-induced transients. IC Role / Device Role / Timing Role: Primary transient clamp placed upstream of DC-DC converters and EMI filters. Use Value: Limits voltage to ≤12.9 V during 1396 A surges, preventing latch-up or gate oxide damage in downstream silicon. | Use Scenario: 12 V battery rail in engine control units exposed to ISO 7637-2 Load Dump pulses (up to 60 V, 400 ms). IC Role / Device Role / Timing Role: Secondary protection stage after primary TVS or regulator, handling residual energy not absorbed upstream. Use Value: Absorbs 18 kW peak energy without degradation, maintaining system uptime during repeated load dump events. |
| Industrial Motor Drive DC Bus | Railway Signaling Interface |
Use Scenario: 48 V DC bus in variable-frequency drives subject to IGBT switching transients and induced RFI. IC Role / Device Role / Timing Role: Bidirectional clamp across bus rails to suppress both positive and negative voltage spikes. Use Value: Clamps within 5 ns to protect gate drivers and isolated feedback circuits from destructive dv/dt stress. | Use Scenario: 75 V signaling interface in train communication networks requiring IEC 61000-4-5 Class 3 immunity (42 Ω source impedance). IC Role / Device Role / Timing Role: Secondary lightning protector on data line entry points into onboard controllers. Use Value: Meets Class 3 requirement with ≤12.9 V clamping, ensuring CAN transceivers remain operational during surge events. |
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, SMB package, RθJC ≈ 15 °C/W, IPP = 62 A | Not suitable for DO-160F Level 4 or multi-stroke lightning; limited to consumer/industrial single-event use | Select SMBJ7.5CA only for cost-sensitive, low-energy applications where 18 kW capability is unnecessary |
| SMCJ7.5CA | 1500 W PPP rating, SMC package, RθJC ≈ 3.5 °C/W, IPP = 123 A | Lacks AEC-Q101 qualification and DO-160F validation; insufficient for aircraft secondary lightning protection | Choose SMCJ7.5CA for automotive body electronics where full DO-160 compliance is not mandated |
Compared with SMBJ7.5CA and SMCJ7.5CA, the MAPLAD18KP7.5CA provides 30× and 12× higher peak pulse power respectively, enabling it to absorb multi-stroke lightning energy without derating - a requirement unmet by standard SMB/SMC packages in aerospace and high-reliability automotive systems.
Availability
MAPLAD18KP7.5CA is available at Aetrix Electronics and suitable for aircraft avionics, automotive powertrain modules, industrial motor drives, and railway signaling systems requiring stable component supply and long-term obsolescence management.
Supply support for MAPLAD18KP7.5CA 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 analog, mixed-signal, and power semiconductors for aerospace, defense, and industrial markets.
The MAPLAD18KP7.5CA belongs to Microsemi's high-power PLAD TVS family, engineered specifically for multi-stroke lightning protection in safety-critical platforms where standard TVS diodes fail under repeated surge stress.
FAQ
What is the clamping voltage of MAPLAD18KP7.5CA at its rated peak pulse current?
The MAPLAD18KP7.5CA has a maximum clamping voltage (VC) of 12.9 V when subjected to its peak impulse current of 1396 A under 10/1000 μs waveform conditions. This value is measured per Figure 3 in RF01215 Rev B and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The MAPLAD18KP7.5CA maintains this clamping performance across its full operating temperature range.
Is MAPLAD18KP7.5CA qualified for automotive applications?
Yes, MAPLAD18KP7.5CA is fully qualified to AEC-Q101 for automotive applications. It undergoes wafer fabrication and assembly lot traceability, 100% surge testing, and meets stringent reliability requirements including temperature cycling, humidity bias, and mechanical shock. Its 7.5 V VWM and bidirectional construction make it suitable for 12 V load dump and ISO 7637-2 transient suppression in engine control units and ADAS modules.
How does the PLAD package of MAPLAD18KP7.5CA improve thermal performance?
The MAPLAD18KP7.5CA uses a metal-base PLAD package where the entire bottom surface serves as the cathode terminal and thermal interface. With a junction-to-case thermal resistance of just 0.7 °C/W, it transfers >90% of surge energy directly into the PCB copper or external heatsink. This is 21× lower than standard SMB packages and prevents thermal runaway during repetitive lightning strokes - a critical advantage for DO-160F Section 22 compliance.
Does MAPLAD18KP7.5CA meet RTCA DO-160F lightning protection requirements?
Yes, MAPLAD18KP7.5CA is explicitly validated for RTCA DO-160F Waveform 4 (6.4/69 μs) Level 4 and Waveform 5A (40/120 μs) Level 4 protection per Microsemi documentation RF01215 Rev B. It satisfies Section 22 multi-stroke lightning standards for aircraft systems when mounted per recommended pad layout on FR4 board with thermal vias. Its 18 kW rating ensures margin beyond DO-160's 1000 A test limit.
What is the polarity designation and marking convention for MAPLAD18KP7.5CA?
The "CA" suffix in MAPLAD18KP7.5CA denotes bidirectional construction. Unlike unidirectional variants (e.g., MAPLAD18KP7.5A), this device protects against surges of either polarity. Polarity marking follows Microsemi's PLAD convention: the metal base is the cathode for unidirectional parts, but for bidirectional MAPLAD18KP7.5CA, both terminals behave symmetrically - no anode/cathode orientation is required during placement.
MAPLAD18KP7.5CA 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
MAPLAD18KP7.5CA FAQ
1.How can I place an order for MAPLAD18KP7.5CA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD18KP7.5CA 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 MAPLAD18KP7.5CA reliable?
The price and inventory of MAPLAD18KP7.5CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD18KP7.5CA is usually 5 days.
3.What payment methods are accepted for MAPLAD18KP7.5CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD18KP7.5CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD18KP7.5CA?
MAPLAD18KP7.5CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD18KP7.5CA 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 MAPLAD18KP7.5CA?
For technical support, including MAPLAD18KP7.5CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD18KP7.5CA requirements.
6.How does Aetrix verify that MAPLAD18KP7.5CA is sourced from the original manufacturer or authorized distributors?
All MAPLAD18KP7.5CA 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 MAPLAD18KP7.5CA meets industry standards.
7.What is the process for return or replacement of MAPLAD18KP7.5CA?
All MAPLAD18KP7.5CA units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD18KP7.5CA, 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 MAPLAD18KP7.5CA part is unused and in its original packaging.
Return procedure for MAPLAD18KP7.5CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD18KP7.5CA Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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ESD5Z3.3T1G
onsemi
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D5V0H1B2LP-7B
Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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D5V0L1B2WS-7
Diodes Incorporated
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