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Microchip Technology MAPLAD36KP18CAE3
- Part No.:
- MAPLAD36KP18CAE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD36KP18CAE3.pdf
- Description:
- TVS DIODE 18VWM 30.8VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:9,616
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Product details
Overview
MAPLAD36KP18CAE3 from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace and automotive systems. It delivers 36 kW peak pulse power at 10/1000 μs, features a 18 V reverse standoff voltage (VWM), clamps to ≤30.8 V at 1169 A IPP, and meets RTCA DO-160 Section 22 multi-stroke lightning requirements.
For engineers reviewing the MAPLAD36KP18CAE3 datasheet, MAPLAD36KP18CAE3 pinout, MAPLAD36KP18CAE3 application, or MAPLAD36KP18CAE3 equivalent, key selection criteria include its bidirectional polarity, 1.0 °C/W junction-to-case thermal resistance, RoHS-compliant e3 termination, IEC 61000-4-5 Class 5 secondary lightning protection capability, and suitability for pin-injection protection per RTCA/DO-160F Waveform 4 Level 4.
Technical Context
This TVS diode operates as a clamping device in parallel with sensitive circuitry to divert high-current transients-such as lightning-induced surges or automotive load dump-away from downstream components. Its silicon avalanche structure enables fast response (<5 ns clamping time) and stable breakdown voltage (20.0–22.1 V at 5 mA) across temperature.
The MAPLAD36KP18CAE3 is optimized for surface-mount PCB integration on FR4 with recommended pad layout, achieving 50 °C/W junction-to-ambient thermal resistance under standard mounting conditions. Its metal-base cathode construction facilitates low-inductance, high-current path routing and direct thermal coupling to heatsinks or copper planes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 18 V - Maximum continuous operating voltage before clamping begins; matches 15–18 V DC bus systems. |
| V(BR) min/max | 20.0–22.1 V @ 5 mA - Ensures reliable conduction onset above normal operating peaks without false triggering. |
| VC @ IPP | 30.8 V @ 1169 A - Clamping voltage limits downstream component stress during worst-case 10/1000 μs surge events. |
| PPP | 36,000 W @ 10/1000 μs - Sustains single-stroke energy up to 36 J, enabling robust aircraft-level lightning protection. |
| RθJC | 1.0 °C/W - Enables effective thermal management when mounted on heatsinked PCBs or thermal pads. |
| ID @ VWM | 60 μA max - Negligible leakage current preserves system efficiency in always-on avionics subsystems. |
| αV(BR) | 16 mV/°C - Predictable temperature drift supports stable clamping performance across −55°C to +150°C junction range. |
Pinout & Package
MAPLAD36KP18CAE3 uses a PLAD (Plastic Leaded Anode/Cathode) surface-mount package with metal base cathode terminal. The device has two terminals: anode (top-side metallization) and cathode (exposed metal base). Thermal and electrical performance relies on proper soldering of the cathode base to a large copper pour or heatsink.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive surge return path | Connected to protected line (e.g., aircraft bus, battery feed); carries full surge current into cathode base. |
| Cathode | Ground reference / heat sink interface | Exposed metal base; must be soldered to ≥1.5 cm² copper area for thermal dissipation and low-inductance grounding. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Protects AC-coupled or dual-polarity lines (e.g., RS-485, MIL-STD-1553 buses) without polarity sensitivity. |
| RTCA DO-160F Waveform 4 Level 4 compliance | Withstands 6.4/69 μs pin-injection transients up to 18 V standoff-validated for aircraft data bus protection. |
| MIL-PRF-19500 upscreening option | Enables high-reliability qualification (e.g., MX/MXL levels) for mission-critical flight control and navigation electronics. |
| Moisture Sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints-reduces handling overhead in automated SMT lines. |
| RoHS-compliant e3 termination | Matte-tin plating ensures lead-free assembly compatibility and long-term solder joint reliability per JEDEC J-STD-020B. |
Applications
| Aircraft Data Bus Protection | Automotive Power Distribution |
|---|---|
Use Scenario: Protecting ARINC 429 or MIL-STD-1553B data lines from induced lightning transients in wingtip or tail-mounted avionics bays. IC Role / Device Role / Timing Role: Bidirectional TVS placed at connector entry point to clamp ±30.8 V surges while preserving signal integrity below 18 V. Use Value: Meets RTCA DO-160 Section 22 multi-stroke lightning test without derating, eliminating need for external spark gaps or gas tubes. | Use Scenario: Safeguarding 12 V battery-fed ECUs (e.g., ABS, ADAS controllers) against ISO 7637-2 Load Dump pulses up to 120 V. IC Role / Device Role / Timing Role: Parallel-connected clamping device that activates within <5 ns to limit bus voltage to 30.8 V during 100 ms transients. Use Value: Withstands 36 kW peak power without degradation-enables single-device protection instead of stacked TVS arrays. |
| Industrial Motor Drive Inputs | Railway Signaling Interfaces |
Use Scenario: Shielding PLC analog input modules from switching transients generated by VFDs or contactor coils in factory automation cabinets. IC Role / Device Role / Timing Role: Transient suppression element on 0–10 V or 4–20 mA sensor inputs, rated for IEC 61000-4-4 EFT bursts. Use Value: 60 μA standby current prevents loading of high-impedance sensor circuits; 1.0 °C/W RθJC allows direct PCB copper thermal sinking. | Use Scenario: Securing track-side signaling relays and Ethernet backhaul interfaces against induced surges from nearby traction currents or lightning strikes. IC Role / Device Role / Timing Role: Secondary lightning protector per IEC 61000-4-5 (42 Ω source, Class 5) on 24 V DC control lines. Use Value: Validated for long-distance Class 5 protection up to 260 V standoff-covers full EN 50121-4 railway EMC envelope. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18CA | 600 W PPP rating, 10× lower peak power; SMC package; 1.5 mm height vs. PLAD's 12.5 mm profile. | Limited to consumer-grade IEC 61000-4-5 Class 3; unsuitable for DO-160F Level 4 or multi-stroke lightning. | Select only for cost-sensitive industrial controls where 36 kW surge capacity is unnecessary. |
| SMCJ18CA | 1500 W PPP; same SMC package footprint but higher power than SMBJ; still 24× lower than MAPLAD36KP18CAE3. | Meets AEC-Q101 but lacks RTCA DO-160F validation; no Class 5 lightning certification. | Use where board space is constrained and surge energy remains below 1.5 J-e.g., non-safety-critical automotive body electronics. |
Compared with SMBJ18CA and SMCJ18CA, MAPLAD36KP18CAE3 provides 24–60× higher peak pulse power, validated DO-160F compliance, and metal-base thermal design-making it the sole choice for certified aerospace surge protection where single-event energy exceeds 10 J.
Availability
MAPLAD36KP18CAE3 is available at Aetrix Electronics and suitable for aircraft avionics, automotive power distribution, industrial motor drive inputs, and railway signaling interfaces requiring stable component supply across extended product lifecycles.
Supply support for MAPLAD36KP18CAE3 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 semiconductor solutions for aerospace, defense, and industrial markets, with emphasis on radiation-hardened ICs, timing devices, and power protection components.
The MAPLAD36KP18CAE3 belongs to Microsemi's high-power PLAD TVS family, engineered specifically for certified lightning and load-dump protection in safety-critical platforms where failure is not an option.
FAQ
What is the clamping voltage of MAPLAD36KP18CAE3 at its rated peak pulse current?
The MAPLAD36KP18CAE3 exhibits a maximum clamping voltage (VC) of 30.8 V at its peak pulse current (IPP) of 1169 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 worst-case surge events. The low clamping ratio (VC/VWM ≈ 1.71) ensures minimal overvoltage stress on downstream components.
Does MAPLAD36KP18CAE3 meet RTCA DO-160F lightning protection requirements?
Yes, MAPLAD36KP18CAE3 is validated for RTCA DO-160F Section 22 multi-stroke lightning testing at Level 4 for Waveform 4 (6.4/69 μs) and supports Level 5 for short-distance configurations. Its 36 kW rating, fast <5 ns response, and bidirectional architecture enable compliance without external circuitry-making MAPLAD36KP18CAE3 suitable for certified aircraft data bus and power line protection.
How is thermal management handled for MAPLAD36KP18CAE3 in high-power surge events?
MAPLAD36KP18CAE3 achieves 1.0 °C/W junction-to-case thermal resistance via its exposed metal cathode base, which must be soldered directly to a thermally robust PCB copper area or heatsink. The datasheet specifies a recommended pad layout with ≥1.5 cm² of 2-oz copper; this configuration enables rapid heat dissipation during repetitive surges and maintains junction temperature below 150°C even at 0.05% duty cycle.
Is MAPLAD36KP18CAE3 compatible with lead-free reflow processes?
Yes, MAPLAD36KP18CAE3 carries the "e3" suffix indicating RoHS-compliant matte-tin termination, qualified for standard lead-free reflow profiles up to 260°C for 10 seconds. Its void-free epoxy body meets UL94V-0 flammability rating, and moisture sensitivity level is rated IPC/JEDEC Level 1-eliminating bake requirements and supporting uninterrupted SMT production.
What is the significance of the "CA" suffix in MAPLAD36KP18CAE3?
The "CA" suffix in MAPLAD36KP18CAE3 denotes bidirectional construction, meaning the device provides symmetrical clamping for both positive and negative transients. Unlike unidirectional variants (e.g., MAPLAD36KP18AE3), the CA version has no polarity marking and functions identically regardless of voltage polarity-essential for protecting AC-coupled communication lines or floating power rails in avionics and rail systems.
MAPLAD36KP18CAE3 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):
- 18V
- Voltage - Breakdown (Min):
- 20V
- Voltage - Clamping (Max) @ Ipp:
- 30.8V
- Current - Peak Pulse (10/1000µs):
- 1169A (1.169kA)
- Power - Peak Pulse:
- 36000W (36kW)
- 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
MAPLAD36KP18CAE3 FAQ
1.How can I place an order for MAPLAD36KP18CAE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD36KP18CAE3 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 MAPLAD36KP18CAE3 reliable?
The price and inventory of MAPLAD36KP18CAE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD36KP18CAE3 is usually 5 days.
3.What payment methods are accepted for MAPLAD36KP18CAE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD36KP18CAE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD36KP18CAE3?
MAPLAD36KP18CAE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD36KP18CAE3 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 MAPLAD36KP18CAE3?
For technical support, including MAPLAD36KP18CAE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD36KP18CAE3 requirements.
6.How does Aetrix verify that MAPLAD36KP18CAE3 is sourced from the original manufacturer or authorized distributors?
All MAPLAD36KP18CAE3 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 MAPLAD36KP18CAE3 meets industry standards.
7.What is the process for return or replacement of MAPLAD36KP18CAE3?
All MAPLAD36KP18CAE3 units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD36KP18CAE3, 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 MAPLAD36KP18CAE3 part is unused and in its original packaging.
Return procedure for MAPLAD36KP18CAE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD36KP18CAE3 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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onsemi
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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
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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