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Microchip Technology MAPLAD18KP58AE3
- Part No.:
- MAPLAD18KP58AE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD18KP58AE3.pdf
- Description:
- TVS DIODE 58VWM 93.6VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:2,042
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Product details
Overview
MAPLAD18KP58AE3 from Microsemi is a unidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace, automotive, and industrial power rails. It delivers 18,000 W peak pulse power at 10/1000 μs, clamps at ≤93.6 V under 207 A peak impulse current, and features a 58 V reverse standoff voltage (VWM) with ±5% breakdown tolerance (64.4–71.2 V). It is RoHS-compliant (e3), AEC-Q101 qualified, and rated for -55°C to +150°C operation.
For engineers reviewing the MAPLAD18KP58AE3 datasheet, MAPLAD18KP58AE3 pinout, MAPLAD18KP58AE3 application, or MAPLAD18KP58AE3 equivalent, this device is selected for lightning-level secondary protection per IEC 61000-4-5 (42 Ω, 12 Ω, and 2 Ω source impedances), RTCA DO-160F Waveform 4 Level 4/5 compliance, and ESD/EFT immunity per IEC 61000-4-2/4-4.
Technical Context
The MAPLAD18KP58AE3 employs an avalanche diode structure optimized for low clamping ratio and minimal thermal resistance (RθJC = 0.7 °C/W). Its metal-base cathode construction enables direct thermal coupling to heatsinks, supporting high-repetition-rate transients when mounted on FR4 with recommended pad layout.
It operates as a shunt-mode protector: under normal bias (≤58 V), leakage remains ≤10 μA; during overvoltage events, it avalanches at ≥64.4 V and clamps to ≤93.6 V at 207 A, limiting energy dissipation across downstream circuitry while maintaining system uptime in harsh electromagnetic environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 58 V - Maximum continuous DC or peak AC voltage the device blocks without conduction. |
| V(BR) min/max | 64.4 V / 71.2 V - Breakdown occurs within this range at 1 mA, ensuring predictable turn-on margin above operating rail. |
| VC @ IPP | 93.6 V - Clamping voltage at 207 A peak pulse; defines worst-case voltage seen by protected ICs during surge. |
| PPP | 18,000 W - Peak pulse power handling at 10/1000 μs waveform; supports multi-stroke lightning standards (DO-160 Section 22). |
| ID @ VWM | ≤10 μA - Ultra-low standby leakage preserves battery life and avoids false triggering in low-power systems. |
| RθJC | 0.7 °C/W - Enables efficient heat transfer to external heatsink; critical for sustained surge duty cycles. |
| TJ/TSTG | -55°C to +150°C - Extended temperature range supports engine bay, avionics, and outdoor industrial deployments. |
Pinout & Package
MAPLAD18KP58AE3 uses a surface-mount plastic package with metal base cathode (case) and single anode terminal. The cathode is the exposed metal bottom surface; the anode is the top-side metallized pad. Thermal performance relies on proper PCB copper area and solder coverage per recommended pad layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (top pad) | Input/line side connection | Connected to protected line (e.g., 24 V supply rail); carries surge current into device during clamping. |
| Cathode (metal base) | Ground/reference node | Must be soldered to large copper pour or heatsink; serves as primary thermal path and return path for surge current. |
Key Features
| Feature | Design Value |
|---|---|
| 18 kW peak pulse rating | Enables compliance with RTCA DO-160F Waveform 4 Level 4 (6.4/69 μs) and IEC 61000-4-5 Class 4 (42 Ω source) without derating. |
| Metal-base thermal design | RθJC = 0.7 °C/W allows mounting directly to heatsinks or thick copper planes, sustaining >0.05% duty cycle surges. |
| AEC-Q101 qualification | Validated for automotive powertrain and chassis applications requiring robustness against thermal cycling and mechanical shock. |
| RoHS-compliant e3 finish | Matte-tin plating ensures reliable solderability per MIL-STD-750 Method 2026 and eliminates lead-based process constraints. |
| Low-profile SMT package | Height ≤ 0.025" (0.64 mm) enables integration in space-constrained avionics modules and motor control boards. |
Applications
| Aerospace Power Distribution | Automotive Load Dump Protection |
|---|---|
Use Scenario: 28 V DC distribution bus in commercial aircraft cabin systems subjected to lightning-induced transients per DO-160 Section 22. IC Role / Device Role / Timing Role: Shunt TVS placed upstream of DC-DC converters and flight-critical sensors to clamp induced surges before they propagate. Use Value: Limits transient voltage to ≤93.6 V for 207 A impulses, preventing latch-up or burnout in downstream PMICs and microcontrollers. | Use Scenario: 12 V/24 V alternator output line in heavy-duty trucks experiencing load dump events up to 120 V for 400 ms. IC Role / Device Role / Timing Role: Primary suppression element absorbing >100 J energy pulses without degradation, protecting infotainment and ADAS ECUs. Use Value: Withstands 1500 A forward surge (IFSM) and maintains <10 μA leakage at 58 V, enabling fail-safe operation across vehicle lifetime. |
| Industrial Motor Drive Inputs | Railway Signaling Interfaces |
Use Scenario: AC/DC front-end input of variable-frequency drives exposed to switching transients and EFT bursts in factory automation. IC Role / Device Role / Timing Role: Fast-response (sub-100 ps turn-on) TVS suppressing RFI-coupled spikes before rectifier bridge and PFC controller. Use Value: Clamps to 93.6 V within nanoseconds, reducing stress on 600 V IGBT gate drivers and extending mean time between failures. | Use Scenario: 72 V signaling lines in European railway signaling cabinets subject to IEC 61000-4-5 Class 3 (42 Ω source) surges during track switching. IC Role / Device Role / Timing Role: Secondary protection stage after gas discharge tube (GDT), providing precise clamping and low capacitance (<100 pF). Use Value: Delivers 18 kW pulse handling with 58 V standoff, ensuring signal integrity for 10 Mbps CAN FD interfaces 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 |
|---|---|---|---|
| SMBJ58A | 600 W PPP rating (vs. 18,000 W); 10× lower surge capacity; DO-214AA package with higher RθJA (50 °C/W). | Not suitable for DO-160F Level 4 or IEC 61000-4-5 Class 4; limited to consumer-grade ESD/EFT only. | Select SMBJ58A only for cost-sensitive, low-energy board-level ESD protection where 18 kW capability is unnecessary. |
| SMCJ58A | 1500 W PPP rating; same DO-214AB package; clamping voltage 93.6 V at 16.6 A (not 207 A); RθJA = 20 °C/W. | Supports basic IEC 61000-4-5 Class 2 but fails Class 4 testing; insufficient for multi-stroke lightning. | Choose SMCJ58A for industrial PLC I/O protection where surge repetition is infrequent and peak current <50 A. |
Compared with SMBJ58A and SMCJ58A, MAPLAD18KP58AE3 provides 30× and 12× higher peak pulse power respectively, enabling compliance with aviation and heavy-vehicle surge standards that demand sustained multi-kilowatt energy absorption without thermal runaway.
Availability
MAPLAD18KP58AE3 is available at Aetrix Electronics and suitable for aerospace power distribution, automotive load dump protection, and industrial motor drive inputs requiring stable component supply across extended product lifecycles.
Supply support for MAPLAD18KP58AE3 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) designs high-reliability semiconductor solutions for aerospace, defense, and industrial markets, with emphasis on radiation-hardened ICs, timing devices, and ruggedized discrete components.
The MPLAD family targets high-energy transient suppression in mission-critical systems, combining metal-base thermal architecture with AEC-Q101 and DO-160 qualification to meet stringent airborne and vehicular surge immunity requirements.
FAQ
What is the maximum clamping voltage of MAPLAD18KP58AE3 at its rated peak pulse current?
The MAPLAD18KP58AE3 has a maximum clamping voltage (VC) of 93.6 V at its rated peak pulse current (IPP) of 207 A under 10/1000 μs waveform conditions. This value is specified in the Electrical Characteristics table and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The clamping performance is validated per JEDEC test methods and forms the basis for system-level overvoltage margin calculations in designs using MAPLAD18KP58AE3.
Is MAPLAD18KP58AE3 suitable for bidirectional signal line protection?
No, MAPLAD18KP58AE3 is a unidirectional TVS diode, indicated by the "A" suffix (as opposed to "CA" for bidirectional variants). It conducts only during positive transients relative to its cathode (metal base), making it appropriate for DC power rail protection but unsuitable for AC or differential data lines without additional circuitry. For bidirectional protection at 58 V standoff, the MAPLAD18KP58CA variant must be used instead of MAPLAD18KP58AE3.
Does MAPLAD18KP58AE3 require a heatsink for standard surge duty cycles?
MAPLAD18KP58AE3 does not require an external heatsink for single-event or low-duty-cycle surges (≤0.05% duty factor), thanks to its low RθJC of 0.7 °C/W and optimized metal-base thermal path. However, for repetitive surges-such as those in motor drive regeneration or frequent lightning-prone environments-a thermally enhanced PCB layout with ≥2 in² copper pour or bolted heatsink contact is recommended to maintain junction temperature below 150°C. Derating curves in Figure 3 confirm thermal limits for extended operation.
How is polarity identified on the MAPLAD18KP58AE3 package?
On MAPLAD18KP58AE3, polarity is defined by physical construction: the cathode is the exposed metal base (bottom surface), and the anode is the top-side metallized pad. No silkscreen marking indicates polarity; correct orientation requires aligning the metal base to the system ground plane. Mounting with reversed polarity will prevent proper clamping and may cause catastrophic failure during overvoltage events. The "A" suffix in MAPLAD18KP58AE3 explicitly denotes unidirectional configuration, reinforcing that cathode-to-ground placement is mandatory for functional protection.
What certifications apply to MAPLAD18KP58AE3 for automotive use?
MAPLAD18KP58AE3 is AEC-Q101 qualified, confirming reliability for automotive electronic components under stress conditions including temperature cycling, humidity, and mechanical shock. It also meets IEC 61000-4-2 (ESD ±8 kV contact), IEC 61000-4-4 (EFT ±2 kV), and IEC 61000-4-5 (lightning surge up to Class 4 with 42 Ω source) - all critical for powertrain and chassis modules. While not ISO/TS 16949 certified itself, MAPLAD18KP58AE3 is manufactured in Microsemi facilities compliant with automotive quality management systems, supporting OEM validation requirements for MAPLAD18KP58AE3.
MAPLAD18KP58AE3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- Nonstandard SMD
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- 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
MAPLAD18KP58AE3 FAQ
1.How can I place an order for MAPLAD18KP58AE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD18KP58AE3 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 MAPLAD18KP58AE3 reliable?
The price and inventory of MAPLAD18KP58AE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD18KP58AE3 is usually 5 days.
3.What payment methods are accepted for MAPLAD18KP58AE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD18KP58AE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD18KP58AE3?
MAPLAD18KP58AE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD18KP58AE3 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 MAPLAD18KP58AE3?
For technical support, including MAPLAD18KP58AE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD18KP58AE3 requirements.
6.How does Aetrix verify that MAPLAD18KP58AE3 is sourced from the original manufacturer or authorized distributors?
All MAPLAD18KP58AE3 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 MAPLAD18KP58AE3 meets industry standards.
7.What is the process for return or replacement of MAPLAD18KP58AE3?
All MAPLAD18KP58AE3 units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD18KP58AE3, 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 MAPLAD18KP58AE3 part is unused and in its original packaging.
Return procedure for MAPLAD18KP58AE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD18KP58AE3 Tags
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