My Inquiry
My Account
Microchip Technology MPLAD18KP58A
- Part No.:
- MPLAD18KP58A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD18KP58A.pdf
- Description:
- TVS DIODE 58VWM 93.6VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:2,487
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MPLAD18KP58A 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, clamps at ≤93.6 V under 207 A peak impulse current, and features a 58 V reverse standoff voltage (VWM) with 64.4–71.2 V breakdown range. It is qualified to AEC-Q101 and meets RTCA DO-160F Level 4 pin injection for waveform 4.
For engineers reviewing the MPLAD18KP58A datasheet, MPLAD18KP58A pinout, MPLAD18KP58A application, or MPLAD18KP58A equivalent, key selection criteria include its 58 V operating voltage margin, sub-100 ns response time, low thermal resistance (RθJC = 0.7 °C/W), RoHS-compliant matte-tin terminations, and qualification for lightning-level multi-stroke transients per DO-160 Section 22.
Technical Context
The MPLAD18KP58A operates as a silicon avalanche diode-based TVS, leveraging controlled breakdown behavior to clamp fast-rising transients before downstream circuitry sustains damage. Its unidirectional polarity and cathode-on-base configuration enable direct integration into DC power rails where reverse polarity is not expected.
It is rated for 18 kW peak pulse power at 10/1000 μs, supports steady-state dissipation up to 2.5 W at 25°C ambient, and exhibits a temperature coefficient of breakdown voltage (αV(BR)) of +69 mV/°C - enabling predictable derating across -55°C to +150°C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 18,000 W @ 10/1000 μs - enables single-device protection against severe lightning-induced surges in avionics and vehicle ECUs |
| Reverse Standoff Voltage (VWM) | 58 V - sets maximum continuous DC operating voltage without leakage activation; matches 48 V nominal bus systems with safety margin |
| Breakdown Voltage (V(BR)) | 64.4–71.2 V @ I(BR) - defines precise conduction onset; ensures reliable triggering above system overvoltage thresholds |
| Max Clamping Voltage (VC) | 93.6 V @ 207 A IPP - limits transient voltage seen by protected ICs to safe levels during worst-case surge events |
| Junction-to-Case Thermal Resistance | 0.7 °C/W - allows efficient heat transfer to PCB copper pour or heatsink, critical for repeated surge duty cycles |
| Standby Current (ID) | 10 μA @ 58 V - guarantees negligible standby power loss and no measurable loading on 48 V supply rails |
| Response Time | <100 ps - ensures sub-nanosecond reaction to ESD and fast-edge transients, protecting sensitive analog and digital inputs |
Pinout & Package
Package: Surface-mount PLAD (Plastic Low-profile Avalanche Diode) - void-free UL94V-0 epoxy body, 12.32 × 10.54 × 5.08 mm (L×W×H), metal base cathode termination, weight ≈1 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (top surface pad) | Positive input terminal for unidirectional operation | Connected to protected line; conducts only when voltage exceeds V(BR) in forward direction relative to cathode |
| Cathode (metal base) | Reference/return terminal; electrically connected to case | Must be soldered to large copper area or heatsink for thermal management and low-inductance grounding 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 aircraft data bus and sensor interface protection |
| AEC-Q101 qualification | Qualified for automotive underhood applications including load dump and alternator ripple suppression |
| IEC 61000-4-5 Class 4 support (42 Ω source) | Meets secondary lightning immunity requirements for industrial control cabinets and power converters |
| RoHS-compliant matte-tin plating | Enables lead-free reflow compatibility and eliminates tin whisker risk in long-life deployments |
| 3σ lot norm screening on ID | Ensures consistent low-leakage performance across production lots - critical for battery-powered or high-impedance sensing nodes |
Applications
| Aerospace Avionics Power Bus Protection | Automotive 48 V Mild Hybrid ECU Protection |
|---|---|
Use Scenario: Protecting ARINC 429 receivers and MIL-STD-1553 bus transceivers from induced lightning transients on aircraft power distribution networks. IC Role / Device Role / Timing Role: Primary surge clamp placed directly at connector entry point to limit voltage excursion to <94 V during DO-160 Section 22 multi-stroke testing. Use Value: Eliminates need for cascaded TVS stages; single MPLAD18KP58A handles full 18 kW threat without degradation after 1000+ strikes. | Use Scenario: Safeguarding gate drivers and CAN transceivers in 48 V battery management systems subjected to ISO 7637-2 Load Dump pulses. IC Role / Device Role / Timing Role: Unidirectional TVS mounted across 48 V rail and chassis ground to clamp 120 V/200 ms transients to ≤94 V within 100 ps. Use Value: Prevents latch-up and oxide rupture in 65 nm microcontrollers while maintaining <10 μA quiescent leakage at nominal 48 V. |
| Industrial Motor Drive DC Link Protection | Railway Signaling Interface Protection |
Use Scenario: Shielding IGBT gate driver ICs and isolated ADCs from commutation-induced spikes on 60–80 V DC link buses in servo drives. IC Role / Device Role / Timing Role: Fast-response clamping device placed between DC+ and isolated ground plane to suppress <100 ns edge transients. Use Value: Reduces required creepage distance by enabling compact layout; RθJC = 0.7 °C/W permits direct mounting to copper-backed FR4 without external heatsink. | Use Scenario: Securing Ethernet PHYs and RS-485 transceivers in wayside signaling controllers exposed to track-induced surges per EN 50121-4. IC Role / Device Role / Timing Role: Secondary protection stage following gas discharge tube (GDT), limiting let-through voltage to <94 V at 207 A. Use Value: Achieves IEC 61000-4-5 Class 4 immunity with 42 Ω source impedance - validated for railway infrastructure deployment. |
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); SMB package; RθJC ≈ 15 °C/W | Only suitable for low-energy ESD/EFT; cannot meet DO-160 lightning or load dump requirements | Select only for consumer-grade board-level ESD where surge energy is <10 J |
| SMCJ58A | 1500 W PPP rating; SMC package; RθJC ≈ 3.5 °C/W; no AEC-Q101 or DO-160 validation | Lacks multi-stroke endurance and aerospace qualification; limited to industrial I/O protection | Use where cost sensitivity outweighs qualification needs and surge energy stays below 50 J |
Compared with SMBJ58A and SMCJ58A, the MPLAD18KP58A provides >12× higher peak power handling, 5× lower thermal resistance, and formal qualification for aviation and automotive environments - making it the sole choice for mission-critical 48–60 V system surge hardening.
Availability
MPLAD18KP58A is available at Aetrix Electronics and suitable for aerospace avionics, automotive 48 V mild hybrid ECUs, and industrial motor drive DC link protection requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for MPLAD18KP58A 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) is a U.S.-based semiconductor company specializing in high-reliability analog, RF, and timing solutions for aerospace, defense, and industrial markets.
The MPLAD18KP58A belongs to Microsemi's PLAD family of high-power surface-mount TVS diodes, engineered specifically for lightning-level transient suppression in safety-critical platforms where multi-stroke endurance and qualification rigor are mandatory.
FAQ
What is the clamping voltage of the MPLAD18KP58A at its rated peak pulse current?
The MPLAD18KP58A has a maximum clamping voltage (VC) of 93.6 V at 207 A peak pulse current (IPP) under 10/1000 μs waveform conditions. This value is guaranteed across the full operating temperature range and ensures protected circuitry remains below critical overvoltage thresholds during surge events.
Is the MPLAD18KP58A suitable for bidirectional signal line protection?
No - the MPLAD18KP58A is a unidirectional TVS diode, indicated by the "A" suffix (not "CA"). Its cathode is on the metal base and anode on the top pad, making it appropriate only for DC power rail protection where polarity is fixed. For bidirectional AC or data line protection, use the MPLAD18KP58CA variant instead.
Does the MPLAD18KP58A require a heatsink for standard operation?
Not for transient-only operation - its 0.7 °C/W junction-to-case thermal resistance allows effective heat dissipation through direct soldering to ≥250 mm² of 2 oz copper on FR4. However, if steady-state power dissipation exceeds 2.5 W (e.g., sustained overvoltage), external heatsinking or forced airflow is required per Figure 3 derating curve.
What standards does the MPLAD18KP58A comply with for lightning protection?
The MPLAD18KP58A is validated for RTCA DO-160 Section 22 multi-stroke lightning (Level 4 pin injection, waveform 4), IEC 61000-4-5 Class 4 with 42 Ω source impedance, and secondary lightning protection per MIL-STD-461 CS117. It is not certified for primary lightning strike protection (Class 5 or direct attachment).
Can the MPLAD18KP58A be used in lead-free reflow processes?
Yes - the MPLAD18KP58A features RoHS-compliant annealed matte-tin plating and is rated for 10-second exposure to 260°C solder temperature per MIL-STD-750 Method 2026, fully compatible with standard lead-free reflow profiles including JEDEC J-STD-020D Level 1 moisture sensitivity.
MPLAD18KP58A 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
MPLAD18KP58A FAQ
1.How can I place an order for MPLAD18KP58A through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD18KP58A 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 MPLAD18KP58A reliable?
The price and inventory of MPLAD18KP58A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD18KP58A is usually 5 days.
3.What payment methods are accepted for MPLAD18KP58A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD18KP58A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD18KP58A?
MPLAD18KP58A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD18KP58A 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 MPLAD18KP58A?
For technical support, including MPLAD18KP58A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD18KP58A requirements.
6.How does Aetrix verify that MPLAD18KP58A is sourced from the original manufacturer or authorized distributors?
All MPLAD18KP58A 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 MPLAD18KP58A meets industry standards.
7.What is the process for return or replacement of MPLAD18KP58A?
All MPLAD18KP58A units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD18KP58A, 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 MPLAD18KP58A part is unused and in its original packaging.
Return procedure for MPLAD18KP58A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD18KP58A 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…
