My Inquiry
My Account
Microchip Technology MPLAD18KP58AE3
- Part No.:
- MPLAD18KP58AE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD18KP58AE3.pdf
- Description:
- TVS DIODE 58VWM 93.6VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:5,282
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MPLAD18KP58AE3 from Microsemi is a unidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace, automotive, and industrial power systems. It delivers 18,000 W peak pulse power at 10/1000 μs, features a 58 V reverse standoff voltage (VWM), clamps to ≤93.6 V at 207 A peak impulse current (IPP), and exhibits 0.7 °C/W junction-to-case thermal resistance for efficient heat dissipation in lightning and load-dump protection circuits.
For engineers reviewing the MPLAD18KP58AE3 datasheet, MPLAD18KP58AE3 pinout, MPLAD18KP58AE3 application, or MPLAD18KP58AE3 equivalent, key selection criteria include its DO-160F Waveform 4 Level 4 compliance, IEC 61000-4-5 Class 1–5 secondary lightning protection capability with 42 Ω source impedance, RoHS-compliant e3 plating, and validated 150 °C maximum junction temperature operation under pulsed conditions.
Technical Context
This TVS diode operates as a clamping device in parallel with sensitive circuitry, activating above its 64.4–71.2 V breakdown voltage (V(BR)) to divert surge energy away from downstream components. Its low 0.7 °C/W RθJC enables direct thermal coupling to heatsinks or PCB copper planes, critical for sustaining multi-stroke lightning events per RTCA DO-160 Section 22.
The device meets AEC-Q101 stress testing requirements and supports MIL-PRF-19500 upscreening options. Its unidirectional polarity places the cathode on the metal base (package bottom), requiring correct PCB orientation during layout to ensure proper clamping directionality in DC-biased rails.
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) | 58 V - maximum continuous DC or peak AC voltage before clamping initiates |
| Clamping Voltage (VC) | ≤93.6 V @ IPP = 207 A - limits transient overvoltage seen by protected ICs |
| Breakdown Voltage (V(BR)) | 64.4–71.2 V @ I(BR) - precise turn-on threshold ensures reliable activation margin |
| Junction-to-Case Thermal Resistance | 0.7 °C/W - enables effective heat transfer to external heatsink or thermal pad |
| Steady-State Power Dissipation | 2.5 W @ TA = 25°C - defines safe continuous bias handling without surge |
| Moisture Sensitivity Level | Level 1 per J-STD-020B - no dry-pack or bake-out required prior to reflow |
Pinout & Package
Package: Surface-mount PLAD (Plastic Leaded Anode Down) with metal base cathode termination. Void-free UL94V-0 epoxy body; tin-lead or RoHS-compliant matte-tin plating; weight ≈1 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (top side) | Positive input terminal | Connected to protected line; current flows into anode during forward surge |
| Cathode (metal base) | Ground reference / return path | Must be soldered to large copper pour or heatsink; serves as primary thermal conduction path |
Key Features
| Feature | Design Value |
|---|---|
| DO-160F Waveform 4 Level 4 compliance | Validated for 6.4/69 μs pin-injection transients at 25 °C - essential for avionics interface protection |
| IEC 61000-4-5 Class 1–5 support (42 Ω source) | Enables single-device secondary lightning protection across full aircraft system classification |
| 0.7 °C/W RθJC | Allows >10× higher pulsed power handling vs. standard SMD TVS without thermal derating |
| RoHS-compliant e3 marking | Meets global environmental regulations without performance compromise or supply chain restriction |
| AEC-Q101 qualified | Validated for automotive under-hood environments including temperature cycling and humidity exposure |
Applications
| Avionics Power Distribution | Automotive Load Dump Protection |
|---|---|
Use Scenario: Protecting flight control module power inputs against induced lightning transients on aircraft wiring harnesses. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed at main 28 V DC bus entry point. Use Value: Meets RTCA DO-160 Section 22 multi-stroke lightning requirement while maintaining <93.6 V clamping to preserve downstream ASIC functionality. | Use Scenario: Safeguarding engine control unit (ECU) power rails during alternator load dump events in 12 V/24 V systems. IC Role / Device Role / Timing Role: Primary surge shunt located between battery feed and ECU input filter stage. Use Value: Absorbs 18,000 W pulses without degradation, preventing latch-up or burnout of microcontroller power management ICs. |
| Industrial Motor Drive DC Bus | Railway Signaling Interface |
Use Scenario: Shielding variable-frequency drive (VFD) logic boards from switching-induced transients on shared DC bus lines. IC Role / Device Role / Timing Role: Bidirectional-capable variant used in floating-ground configurations; this unidirectional version applied in grounded DC link topologies. Use Value: Clamps within 100 ps to limit voltage overshoot below IGBT gate oxide breakdown thresholds during fast dV/dt events. | Use Scenario: Securing track-side signaling electronics connected to long outdoor cables vulnerable to induced surges. IC Role / Device Role / Timing Role: Secondary protection stage after gas discharge tube (GDT), placed directly before RS-485 transceiver inputs. Use Value: Provides sub-100 ns response with 58 V standoff to avoid false triggering during normal 48 V nominal signaling, while clamping to <94 V during IEC 61000-4-5 surges. |
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, 58 V VWM, DO-214AA package, RθJC ≈ 40 °C/W | Limited to single-stroke surges; unsuitable for DO-160 multi-stroke or IEC 61000-4-5 Class 4/5 | Select only for cost-sensitive consumer-grade designs with <1 kA surge exposure |
| SMCJ58A | 1500 W PPP rating, same VWM, DO-214AB package, RθJC ≈ 15 °C/W | Cannot sustain repeated 10/1000 μs surges above 1.5 kW without thermal runaway | Acceptable for industrial PLC I/O protection where duty cycle is <0.01% and heatsinking is minimal |
Compared with SMBJ58A and SMCJ58A, the MPLAD18KP58AE3 provides >12× higher peak pulse power and >20× lower thermal resistance-enabling reliable operation in mission-critical aerospace and heavy-duty automotive systems where multi-event surge resilience is non-negotiable.
Availability
MPLAD18KP58AE3 is available at Aetrix Electronics and suitable for avionics power distribution, automotive load dump protection, and industrial motor drive DC bus applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for safety-critical deployments.
Supply support for MPLAD18KP58AE3 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) is a U.S.-based semiconductor company specializing in high-reliability analog, mixed-signal, and radiation-hardened solutions for aerospace, defense, and industrial markets.
The MPLAD18KP58AE3 belongs to Microsemi's high-power PLAD-series TVS family, engineered specifically for multi-stroke lightning protection and automotive load-dump immunity in harsh-environment electronic systems.
FAQ
What is the clamping voltage specification for MPLAD18KP58AE3 under maximum rated surge conditions?
The MPLAD18KP58AE3 has a maximum clamping voltage (VC) of 93.6 V when subjected to its peak impulse current (IPP) of 207 A under the standard 10/1000 μs waveform. This value is measured at the device terminals with proper PCB thermal design and confirms the device's ability to limit overvoltage to safe levels for downstream 100 V-rated components. The MPLAD18KP58AE3 maintains this clamping performance across its full operating temperature range of –55 °C to +150 °C.
Does MPLAD18KP58AE3 meet DO-160F Section 22 lightning test requirements?
Yes, the MPLAD18KP58AE3 is explicitly rated for RTCA DO-160F Section 22 multi-stroke lightning testing, including Waveform 4 (6.4/69 μs) Level 4 compliance at 25 °C. Its 18,000 W peak pulse power rating and low thermal resistance enable it to withstand repeated lightning-induced transients without parametric shift or failure. The MPLAD18KP58AE3 data sheet confirms qualification across the full PLAD18KP series for aircraft-level surge immunity.
How is polarity configured on MPLAD18KP58AE3, and what does the "A" suffix indicate?
The "A" suffix in MPLAD18KP58AE3 denotes unidirectional construction, meaning the device conducts only in reverse breakdown mode-protecting positive DC rails. The cathode is the metal base (bottom side), and the anode is the top-side metallization. This configuration requires correct PCB orientation: cathode must connect to system ground or low-impedance return path. The MPLAD18KP58AE3 cannot be substituted for bidirectional variants (e.g., MPLAD18KP58CA) without circuit redesign.
What thermal management considerations apply to MPLAD18KP58AE3 in high-duty-cycle applications?
The MPLAD18KP58AE3 relies on its 0.7 °C/W junction-to-case thermal resistance, so effective heat sinking via the metal base is mandatory for repetitive surges. Use of ≥2 in² 2-oz copper pad with thermal vias to internal ground planes is recommended. Derating curves in the datasheet show PPP drops to ~7 kW at 100 °C case temperature. For sustained operation, the MPLAD18KP58AE3 must be mounted per the specified pad layout (Ref. RF01215) to avoid thermal saturation and premature failure.
Is MPLAD18KP58AE3 compliant with automotive reliability standards?
Yes, the MPLAD18KP58AE3 is tested and qualified to AEC-Q101 for discrete semiconductors, covering stress tests such as high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing. Its construction-including void-free epoxy molding, wafer lot traceability, and 3σ screening on standby current-meets automotive under-hood reliability requirements. The MPLAD18KP58AE3 is approved for use in engine control, transmission, and ADAS power systems where load-dump immunity is critical.
MPLAD18KP58AE3 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
MPLAD18KP58AE3 FAQ
1.How can I place an order for MPLAD18KP58AE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD18KP58AE3 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 MPLAD18KP58AE3 reliable?
The price and inventory of MPLAD18KP58AE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD18KP58AE3 is usually 5 days.
3.What payment methods are accepted for MPLAD18KP58AE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD18KP58AE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD18KP58AE3?
MPLAD18KP58AE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD18KP58AE3 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 MPLAD18KP58AE3?
For technical support, including MPLAD18KP58AE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD18KP58AE3 requirements.
6.How does Aetrix verify that MPLAD18KP58AE3 is sourced from the original manufacturer or authorized distributors?
All MPLAD18KP58AE3 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 MPLAD18KP58AE3 meets industry standards.
7.What is the process for return or replacement of MPLAD18KP58AE3?
All MPLAD18KP58AE3 units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD18KP58AE3, 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 MPLAD18KP58AE3 part is unused and in its original packaging.
Return procedure for MPLAD18KP58AE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD18KP58AE3 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…
