My Inquiry
My Account
Microchip Technology MAPLAD18KP58CA
- Part No.:
- MAPLAD18KP58CA
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD18KP58CA.pdf
- Description:
- TVS DIODE 58VWM 93.6VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:5,204
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAPLAD18KP58CA 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 ≤93.6 V under 100 A peak impulse current, and features a 58 V reverse standoff voltage (VWM) with ±5% breakdown tolerance (64.4–71.2 V). It is qualified to AEC-Q101 and meets RTCA DO-160F Waveform 4 Level 4 and IEC 61000-4-5 Class 1–5 secondary lightning protection requirements.
For engineers reviewing the MAPLAD18KP58CA datasheet, MAPLAD18KP58CA pinout, MAPLAD18KP58CA application, or MAPLAD18KP58CA 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 and 24/28 V vehicle electronics.
Technical Context
The MAPLAD18KP58CA employs an avalanche diode structure optimized for fast response (<5 ns clamping time) and repeatable multi-pulse energy handling. Its metal-base package provides direct thermal path to PCB copper, enabling stable operation under 0.05% duty-cycle surges per Figure 1 of RF01215 Rev B.
It supports bidirectional transient suppression without polarity sensitivity, meeting IEC 61000-4-2 ESD (±30 kV air), IEC 61000-4-4 EFT (40 A), and RTCA DO-160F pin injection standards across temperature. Standby leakage is limited to 10 μA at 58 V, ensuring minimal system loading during normal operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 18,000 W @ 10/1000 μs - sustains aircraft-grade lightning transients without degradation |
| Reverse Standoff Voltage (VWM) | 58 V - matches nominal 48–60 V DC systems while allowing margin above operating peak |
| Max Clamping Voltage (VC) | 93.6 V @ 100 A - limits downstream component stress during full-rated surge |
| Junction-to-Case Thermal Resistance | 0.7 °C/W - enables efficient heat transfer to heatsink or large copper pour |
| Clamping Response Time | <5 ns - suppresses fast-rising transients before sensitive circuitry reacts |
| Standby Leakage Current | 10 μA @ 58 V - negligible power loss in always-on 24/28 V or 48 V rail monitoring |
| IEC 61000-4-5 Compliance | Class 1–5 (42 Ω source) - certified for secondary lightning protection in industrial & avionics enclosures |
Pinout & Package
MAPLAD18KP58CA uses a surface-mount PLAD package with metal base acting as cathode terminal for bidirectional operation. The device has two terminals: Anode (top-side marked side) and Cathode (exposed metal base). Mounting requires FR4 PCB with recommended pad layout per RF01215 Rev B, page 7.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive surge return path | Connected to protected line; conducts during positive transients relative to cathode |
| Cathode (Metal Base) | Common reference / heat sink interface | Exposed copper base serves as both electrical return and primary thermal conduction path to PCB |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional suppression | Protects AC-coupled or floating DC lines without polarity constraints - essential for CAN, RS-485, and avionics data buses |
| Low RθJC (0.7 °C/W) | Enables >10× higher sustained surge repetition vs. standard SMT TVS - validated per thermal derating curve in Figure 3 |
| AEC-Q101 qualification | Guarantees reliability for automotive power modules and engine control units operating from −40°C to +125°C ambient |
| RTCA DO-160F Waveform 4 Level 4 | Withstands 6.4/69 μs pin-injection surges up to 100 Vpk - required for flight-critical sensor and actuator interfaces |
| MIL-PRF-19500 upscreening option | Supports high-reliability screening (MX/MXL levels) for space-qualified subsystems with full lot traceability |
Applications
| Aerospace Power Distribution | Automotive Load Dump Protection |
|---|---|
Use Scenario: 28 V DC main bus in commercial aircraft avionics bays exposed to DO-160 Section 22 lightning-induced surges. IC Role / Device Role / Timing Role: Primary transient clamp on generator output and battery feed lines - absorbs multi-stroke events without failure. Use Value: Meets RTCA DO-160F Waveform 4 Level 4 and IEC 61000-4-5 Class 5 with no derating needed at 25°C - eliminates need for parallel devices. |
Use Scenario: 12/24 V alternator output in heavy-duty trucks experiencing ISO 7637-2 Load Dump pulses up to 120 V. IC Role / Device Role / Timing Role: Bidirectional TVS placed upstream of DC-DC converters and ECUs to limit bus overvoltage. Use Value: 18 kW PPP rating handles 120 V × 150 A load dump peaks; 58 V VWM ensures compatibility with 28 V nominal systems. |
| Industrial Motor Drive I/O | Railway Signaling Interface |
Use Scenario: Encoder and analog feedback lines in servo drives subjected to switching noise and ground bounce. IC Role / Device Role / Timing Role: Localized bidirectional clamp at connector entry point - suppresses EFT bursts and inductive kickback. Use Value: 5 ns response time prevents latch-up in 3.3 V/5 V logic; 10 μA leakage avoids signal offset in precision current loops. |
Use Scenario: 75 Ω balanced signaling lines in European railway ETCS Level 2 trackside equipment exposed to induced surges. IC Role / Device Role / Timing Role: Differential-mode TVS across twisted-pair inputs - maintains signal integrity during 1 kV/500 A transients. Use Value: Bidirectional symmetry ensures equal clamping on both conductors; RoHS-compliant matte-tin plating ensures solder joint reliability in humid environments. |
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 SP1003-058 | 58 V VWM, 12 kW PPP, unidirectional only, TO-277 package | Lacks bidirectional capability and DO-160F certification; lower thermal performance (RθJC ≈ 2.5 °C/W) | Select when cost sensitivity outweighs multi-stroke reliability and aerospace compliance needs |
| Vishay SMAJ58CA | 58 V VWM, 400 W PPP, SMA package, bidirectional | Insufficient for lightning-level surges; suitable only for board-level ESD/EFT, not system-level protection | Use only for secondary protection downstream of MAPLAD18KP58CA - never as direct replacement |
Compared with SP1003-058 and SMAJ58CA, MAPLAD18KP58CA uniquely combines bidirectional 18 kW surge handling, AEC-Q101 + DO-160F qualification, and 0.7 °C/W thermal resistance - making it the sole option for primary lightning protection in safety-critical airborne and vehicular power systems.
Availability
MAPLAD18KP58CA is available at Aetrix Electronics and suitable for aerospace power distribution, automotive load dump protection, and industrial motor drive I/O requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for MAPLAD18KP58CA 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 robust discrete components.
MAPLAD18KP58CA belongs to Microsemi's PLAD-series high-power TVS family, engineered specifically for multi-stroke lightning immunity and thermal stability in mission-critical power electronics.
FAQ
What is the clamping voltage of MAPLAD18KP58CA at its rated peak pulse current?
The MAPLAD18KP58CA exhibits a maximum clamping voltage (VC) of 93.6 V at 100 A peak pulse current under 10/1000 μs waveform conditions. This value is guaranteed per the Electrical Characteristics table in RF01215 Rev B and defines the upper voltage limit imposed on protected circuitry during full-rated surge events.
Is MAPLAD18KP58CA suitable for automotive applications requiring AEC-Q101 qualification?
Yes, MAPLAD18KP58CA is explicitly tested and qualified to AEC-Q101 standards, as confirmed in the "High-Reliability screening available in reference to MIL-PRF-19500 / Tested in accordance with the requirements of AEC-Q101" banner on page 1 of RF01215 Rev B. This makes MAPLAD18KP58CA appropriate for under-hood and chassis-mounted automotive electronics.
Does MAPLAD18KP58CA meet RTCA DO-160F lightning protection requirements?
Yes, MAPLAD18KP58CA is certified for RTCA DO-160F Section 22 lightning-induced transient testing, specifically Waveform 4 (6.4/69 μs) Level 4 and Waveform 5A (40/120 μs) Level 4 per the "Pin injection protection" section on page 1 of RF01215 Rev B - confirming its suitability for commercial aircraft avionics.
What is the thermal resistance from junction to case for MAPLAD18KP58CA?
The junction-to-case thermal resistance (RθJC) of MAPLAD18KP58CA is 0.7 °C/W, measured under specified mounting conditions on FR4 PCB with recommended pad layout. This low value enables effective heat dissipation into the PCB copper plane or external heatsink, supporting repeated surge events without thermal runaway.
How does the bidirectional construction of MAPLAD18KP58CA affect its circuit implementation?
The bidirectional construction of MAPLAD18KP58CA allows symmetrical transient suppression on AC-coupled or floating DC lines without regard to polarity - the cathode is the metal base, and the anode is the top-side marked terminal. This eliminates orientation concerns during placement and simplifies protection of differential buses like RS-485 or CAN FD, where voltage reversals occur naturally.
MAPLAD18KP58CA 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):
- 58V
- Voltage - Breakdown (Min):
- 64.4V
- Voltage - Clamping (Max) @ Ipp:
- 93.6V
- Current - Peak Pulse (10/1000µs):
- 193A
- 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
MAPLAD18KP58CA FAQ
1.How can I place an order for MAPLAD18KP58CA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD18KP58CA 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 MAPLAD18KP58CA reliable?
The price and inventory of MAPLAD18KP58CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD18KP58CA is usually 5 days.
3.What payment methods are accepted for MAPLAD18KP58CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD18KP58CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD18KP58CA?
MAPLAD18KP58CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD18KP58CA 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 MAPLAD18KP58CA?
For technical support, including MAPLAD18KP58CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD18KP58CA requirements.
6.How does Aetrix verify that MAPLAD18KP58CA is sourced from the original manufacturer or authorized distributors?
All MAPLAD18KP58CA 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 MAPLAD18KP58CA meets industry standards.
7.What is the process for return or replacement of MAPLAD18KP58CA?
All MAPLAD18KP58CA units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD18KP58CA, 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 MAPLAD18KP58CA part is unused and in its original packaging.
Return procedure for MAPLAD18KP58CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD18KP58CA 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…
