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Microchip Technology MAPLAD18KP30CA
- Part No.:
- MAPLAD18KP30CA
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD18KP30CA.pdf
- Description:
- TVS DIODE 30VWM 48.4VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:4,851
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Product details
Overview
MAPLAD18KP30CA 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 30 V reverse standoff voltage (VWM), clamps to ≤48.4 V at 372 A peak impulse current (IPP), and meets RTCA DO-160 Section 22 multi-stroke lightning requirements.
For engineers reviewing the MAPLAD18KP30CA datasheet, MAPLAD18KP30CA pinout, MAPLAD18KP30CA application, or MAPLAD18KP30CA equivalent, this device is selected for secondary lightning protection per IEC 61000-4-5 (42 Ω, 12 Ω, and 2 Ω source impedances), pin injection immunity per RTCA/DO-160F Waveform 4 (Level 4), and ESD/EFT compliance per IEC 61000-4-2/4-4.
Technical Context
The MAPLAD18KP30CA employs an avalanche breakdown structure optimized for fast response (<5 ns clamping time) and low thermal resistance (RθJC = 0.7 °C/W). Its bidirectional construction enables symmetrical clamping across both polarities without external circuitry, supporting robust protection in AC-coupled or floating signal paths.
It operates over –55 °C to +150 °C junction temperature, with moisture sensitivity level 1 (no dry pack required), RoHS-compliant matte-tin plating, and UL94V-0 epoxy encapsulation - all validated under AEC-Q101 stress testing and MIL-PRF-19500 upscreening options.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 18,000 W @ 10/1000 μs - sustains aircraft-grade lightning surges without failure |
| Reverse Standoff Voltage (VWM) | 30 V - maximum continuous operating voltage before conduction begins |
| Clamping Voltage (VC) | ≤48.4 V @ IPP = 372 A - limits downstream voltage stress during surge events |
| Breakdown Voltage (V(BR)) | 33.3–36.8 V @ I(BR) - ensures reliable turn-on margin above VWM |
| Thermal Resistance (RθJC) | 0.7 °C/W - enables efficient heat transfer to PCB copper or heatsink |
| Standby Current (ID) | ≤10 μA @ VWM - negligible leakage in standby, critical for low-power systems |
| Clamping Response Time | <5 ns - suppresses fast transients before sensitive circuitry reacts |
Pinout & Package
MAPLAD18KP30CA uses a surface-mount PLAD package with two terminals: anode and cathode on opposite sides of the metal base. The cathode is the metal base underside (per manufacturer marking convention); polarity is bidirectional, so both terminals function identically under reverse or forward surge conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Top-side marked terminal) | Surge current entry point (bidirectional) | Accepts transient energy from either polarity; symmetric conduction path |
| Cathode (Metal base underside) | Surge current return path (bidirectional) | Serves as thermal interface and low-inductance ground reference; requires direct PCB copper contact |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Eliminates need for dual-device configurations in AC or differential lines |
| 18 kW surge rating | Meets RTCA DO-160 Section 22 multi-stroke lightning test requirements |
| 0.7 °C/W RθJC | Enables high-reliability operation on FR4 with recommended pad layout (no heatsink required) |
| IEC 61000-4-5 compliance | Validated for Class 1–5 secondary lightning protection with 42 Ω, 12 Ω, and 2 Ω source impedances |
| RTCA/DO-160F Waveform 4 immunity | Rated Level 4 (6.4/69 μs) up to 200 V VWM variants - protects avionics I/O pins |
Applications
| Aerospace Avionics Power Input | Automotive Load Dump Protection |
|---|---|
Use Scenario: 28 V DC power input stage of flight control computers exposed to lightning-induced surges per DO-160 Section 22. IC Role / Device Role / Timing Role: Primary transient suppression device placed directly at connector entry point. Use Value: Limits clamped voltage to ≤48.4 V, protecting downstream DC-DC converters and microcontrollers rated for 40 V absolute max. | Use Scenario: 12 V/24 V battery-fed ECUs subjected to ISO 7637-2 Load Dump pulses (up to 120 V, 400 ms). IC Role / Device Role / Timing Role: High-energy clamp parallel to input filter capacitor, absorbing >100 J energy. Use Value: Withstands 372 A peak current and 18 kW pulse without degradation, meeting AEC-Q101 reliability requirements. |
| Industrial Motor Drive Gate Driver Supply | Railway Signaling Interface |
Use Scenario: Isolated 15 V gate driver supply rail in traction inverters, subject to switching-induced transients and EFT bursts. IC Role / Device Role / Timing Role: Secondary protection after primary LC filter, handling residual fast edges. Use Value: <5 ns response time prevents latch-up in SiC MOSFET drivers; 10 μA ID avoids bias current errors in precision references. | Use Scenario: 48 V signaling lines in European railway interlocking systems, requiring EN 50121-4 immunity to 4 kV EFT and 2 kV surge. IC Role / Device Role / Timing Role: Bidirectional TVS on differential RS-485 or MVB bus lines. Use Value: Symmetric clamping maintains signal integrity across ±48 V common-mode range; UL94V-0 body supports flame-retardant cabinet requirements. |
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 SMAJ33CA | 600 W PPP rating, SMA package, RθJA ≈ 40 °C/W, IPP = 38.9 A | Lower energy handling; suitable only for sub-system-level protection, not primary lightning arrest | Select when cost-sensitive, lower-surge environments (e.g., consumer industrial) require RoHS-compliant SMT TVS with footprint compatibility |
| Vishay SM8S33CA | 6,600 W PPP, DO-218AB package, RθJC ≈ 1.5 °C/W, IPP = 140 A | Mid-tier energy rating; lacks DO-160F Waveform 4 Level 4 validation and MIL-PRF-19500 screening options | Choose for automotive ECUs needing AEC-Q101 qualification and higher surge margin than SMAJ but below MAPLAD-class requirements |
Compared with SMAJ33CA and SM8S33CA, MAPLAD18KP33CA offers 3× and 2.7× higher peak pulse power respectively, validated clamping performance under aviation-standard multi-stroke lightning, and traceable high-reliability manufacturing - making it the only option qualified for primary surge defense in flight-critical power inputs.
Availability
MAPLAD18KP30CA is available at Aetrix Electronics and suitable for aerospace avionics, automotive ECU load dump protection, and industrial motor drive gate supply circuits requiring stable component supply, long-term lifecycle support, and certified surge resilience.
Supply support for MAPLAD18KP30CA 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 expertise in radiation-hardened ICs, timing devices, and power protection components.
The MAPLAD series was developed specifically for high-energy transient suppression in safety-critical platforms - emphasizing DO-160 compliance, thermal efficiency, and lot-traceable manufacturing for mission assurance.
FAQ
What is the clamping voltage of MAPLAD18KP30CA at its rated peak pulse current?
The MAPLAD18KP30CA has a maximum clamping voltage (VC) of 48.4 V when subjected to its rated peak impulse current (IPP) of 372 A under 10/1000 μs waveform conditions. This value is guaranteed per the datasheet's Electrical Characteristics table and defines the upper voltage limit imposed on protected circuitry during worst-case surge events.
Is MAPLAD18KP30CA qualified for automotive applications per AEC-Q101?
Yes, MAPLAD18KP30CA is tested and qualified in accordance with AEC-Q101 requirements for discrete semiconductors. The device undergoes stress testing including HTGB, HTRB, TST, and surge validation - confirming suitability for under-hood and powertrain applications where reliability under thermal and electrical stress is mandatory.
Does MAPLAD18KP30CA require a heatsink for standard operation?
No, MAPLAD18KP30CA does not require an external heatsink under typical single-pulse surge conditions. Its low junction-to-case thermal resistance (0.7 °C/W) and recommended FR4 PCB pad layout enable sufficient heat dissipation into the board copper. However, for repetitive surge duty cycles (>0.05% duty factor), derating per Figure 3 is required.
How is polarity identified on MAPLAD18KP30CA given its bidirectional construction?
Although MAPLAD18KP30CA is bidirectional, the cathode is physically defined as the metal base underside per Microsemi documentation. No functional polarity distinction exists in circuit operation - both terminals behave identically - but mechanical mounting must ensure full thermal contact between the metal base and PCB copper for optimal RθJC performance.
What standards does MAPLAD18KP30CA meet for lightning protection?
MAPLAD18KP30CA meets RTCA DO-160 Section 22 for multi-stroke lightning (Level 4), IEC 61000-4-5 for secondary lightning protection (Classes 1–5 with 42 Ω, 12 Ω, and 2 Ω source impedances), and IEC 61000-4-2/4-4 for ESD and EFT immunity - all verified per the RF01215 datasheet revision B.
MAPLAD18KP30CA 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):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 372A
- 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
MAPLAD18KP30CA FAQ
1.How can I place an order for MAPLAD18KP30CA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD18KP30CA 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 MAPLAD18KP30CA reliable?
The price and inventory of MAPLAD18KP30CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD18KP30CA is usually 5 days.
3.What payment methods are accepted for MAPLAD18KP30CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD18KP30CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD18KP30CA?
MAPLAD18KP30CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD18KP30CA 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 MAPLAD18KP30CA?
For technical support, including MAPLAD18KP30CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD18KP30CA requirements.
6.How does Aetrix verify that MAPLAD18KP30CA is sourced from the original manufacturer or authorized distributors?
All MAPLAD18KP30CA 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 MAPLAD18KP30CA meets industry standards.
7.What is the process for return or replacement of MAPLAD18KP30CA?
All MAPLAD18KP30CA units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD18KP30CA, 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 MAPLAD18KP30CA part is unused and in its original packaging.
Return procedure for MAPLAD18KP30CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD18KP30CA Tags
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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