My Inquiry
My Account
Microchip Technology MPLAD18KP70CAE3
- Part No.:
- MPLAD18KP70CAE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD18KP70CAE3.pdf
- Description:
- TVS DIODE 70VWM 113VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:5,489
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MPLAD18KP70CAE3 from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace, automotive, and industrial systems. It delivers 18,000 W peak pulse power at 10/1000 μs, features a 70 V reverse standoff voltage (VWM), clamps to ≤113 V at 1000 A peak impulse current, and meets RTCA DO-160F Level 4 pin injection and IEC 61000-4-5 Class 1–5 secondary lightning standards.
For engineers reviewing the MPLAD18KP70CAE3 datasheet, MPLAD18KP70CAE3 pinout, MPLAD18KP70CAE3 application, or MPLAD18KP70CAE3 equivalent, key selection criteria include its bidirectional polarity, 70 V working voltage, 113 V max clamping at 1000 A, thermal resistance of 0.7 °C/W junction-to-case, and compliance with AEC-Q101 and MIL-PRF-19500 upscreening options.
Technical Context
This TVS diode operates as a voltage-clamped crowbar device triggered by avalanche breakdown above its specified V(BR) range (77.8–86.0 V). Its low RθJC (0.7 °C/W) enables effective heat transfer to the PCB copper pad or heatsink, supporting multi-stroke surge endurance under RTCA DO-160 Section 22 test conditions.
It is rated for bidirectional transient suppression, with symmetrical clamping behavior in both polarities, and supports IEC 61000-4-2 ESD (±30 kV contact), IEC 61000-4-4 EFT (4 kV), and IEC 61000-4-5 surge (up to 4 kV line-earth with 42 Ω source impedance) - all verified per manufacturer test reports.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 18,000 W @ 10/1000 μs - sustains aircraft-grade lightning surges without failure |
| Reverse Standoff Voltage (VWM) | 70 V - maximum continuous DC or peak AC voltage before conduction begins |
| Clamping Voltage (VC) | ≤113 V @ IPP = 1000 A - limits downstream circuit voltage during surge events |
| Breakdown Voltage (V(BR)) | 77.8–86.0 V @ I(BR) - defines precise avalanche initiation threshold |
| Junction-to-Case Thermal Resistance | 0.7 °C/W - enables efficient heat dissipation into PCB copper or heatsink |
| Steady-State Power Dissipation | 71 W @ TC = 100°C - supports sustained thermal load when mounted on heatsink |
| Temperature Coefficient (αV(BR)) | +84 mV/°C - quantifies V(BR) drift over operating temperature range |
Pinout & Package
Package: Surface-mount PLAD (Plastic Low-Profile Anode/Cathode) package with metal base cathode terminal; void-free UL94V-0 epoxy body; matte-tin RoHS-compliant plating (e3); weight ≈1 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Top Surface Pad) | Transient Current Entry (Bidirectional) | Primary surge current path during positive or negative transients; soldered to PCB trace |
| Cathode (Metal Base) | Transient Current Return / Heat Sink Interface | Low-thermal-resistance path to PCB copper pour or external heatsink; electrically active terminal |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional Surge Suppression | Enables single-device protection for AC lines or differential signals without polarity concerns |
| RTCA DO-160F Waveform 4 Compliance (Level 4) | Validated for 6.4/69 μs pin-injection transients in avionics equipment |
| AEC-Q101 Qualified | Qualified for automotive underhood applications including load dump and alternator transients |
| MIL-PRF-19500 Upscreening Options | Supports high-reliability screening (M, MA, MX, MXL levels) for defense/aerospace programs |
| Moisture Sensitivity Level 1 | No dry-pack or baking required prior to reflow - simplifies SMT assembly |
Applications
| Aircraft Avionics Power Input | Automotive Engine Control Unit (ECU) |
|---|---|
Use Scenario: Protection of 28 V DC power inputs in flight control computers subjected to DO-160 Section 22 lightning-induced surges. IC Role / Device Role / Timing Role: Primary clamping device limiting transient voltage to <113 V during multi-stroke lightning events. Use Value: Enables compliance with DO-160F Level 4 pin injection (6.4/69 μs) and waveform 5A (40/120 μs) without derating at 25°C. | Use Scenario: Guarding microcontroller power rails against 12 V battery load dump transients (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: High-power crowbar element shunting >1000 A surge energy away from sensitive logic. Use Value: Delivers 18 kW peak power handling while maintaining <113 V clamping - prevents MCU latch-up or reset. |
| Industrial Motor Drive DC Bus | Railway Signaling Interface |
Use Scenario: Protecting 70 V-rated IGBT gate drivers from switching-induced voltage spikes and inductive kickback. IC Role / Device Role / Timing Role: Bidirectional clamp across DC bus rails to suppress both positive and negative transients. Use Value: Symmetrical clamping ensures equal protection for +70 V and –70 V excursions - eliminates need for dual unidirectional devices. | Use Scenario: Securing 70 V signaling lines in track-side electronics exposed to induced surges from nearby traction currents. IC Role / Device Role / Timing Role: Secondary lightning protector per IEC 61000-4-5 (42 Ω source, Class 4) on field wiring. Use Value: Withstands repeated 4 kV surges while maintaining VWM ≥70 V - ensures long-term reliability in harsh EMI 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 |
|---|---|---|---|
| SMBJ70CA | 600 W PPP rating, 10× lower peak power; SMB package; RθJC ≈ 15 °C/W | Not suitable for DO-160 lightning testing; limited to consumer/industrial grade surge events | Select only for cost-sensitive, low-energy applications where 18 kW capability is unnecessary |
| SMCJ70CA | 1500 W PPP rating; SMC package; RθJC ≈ 3.5 °C/W; no AEC-Q101 or DO-160 qualification | Lacks aviation and automotive qualification; insufficient for multi-stroke lightning duty cycles | Acceptable for basic IEC 61000-4-5 Class 3 protection but not for certified aerospace or automotive use |
Compared with SMBJ70CA and SMCJ70CA, the MPLAD18KP70CAE3 provides 30× higher peak pulse power, 5× lower thermal resistance, and formal qualification for RTCA DO-160F and AEC-Q101 - making it the only option for certified high-reliability surge protection in safety-critical systems.
Availability
MPLAD18KP70CAE3 is available at Aetrix Electronics and suitable for aircraft avionics, automotive engine control units, and industrial motor drive systems requiring stable component supply, long lifecycle support, and traceable sourcing.
Supply support for MPLAD18KP70CAE3 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 analog, mixed-signal, and power semiconductors for aerospace, defense, and industrial markets.
The MPLAD18KP70CAE3 belongs to Microsemi's PLAD-series high-power TVS family, engineered specifically for certified lightning and load-dump protection in mission-critical platforms where multi-stroke endurance and thermal robustness are mandatory.
FAQ
What is the clamping voltage of the MPLAD18KP70CAE3 at 1000 A peak impulse current?
The MPLAD18KP70CAE3 has a maximum clamping voltage (VC) of 113 V at 1000 A peak impulse current under 10/1000 μs waveform conditions. This value is guaranteed per the manufacturer's electrical characteristics table and is critical for ensuring downstream circuitry remains below safe voltage thresholds during surge events. The MPLAD18KP70CAE3 achieves this performance while maintaining bidirectional symmetry and low thermal resistance.
Is the MPLAD18KP70CAE3 qualified for automotive applications?
Yes, the MPLAD18KP70CAE3 is AEC-Q101 qualified, confirming its suitability for automotive underhood applications such as engine control units and battery management systems. It withstands load dump transients and meets stringent reliability requirements including wafer lot traceability and surge testing. The MPLAD18KP70CAE3 also supports optional MIL-PRF-19500 upscreening for enhanced automotive or defense use cases.
Does the MPLAD18KP70CAE3 meet RTCA DO-160 lightning protection requirements?
Yes, the MPLAD18KP70CAE3 is explicitly validated for RTCA DO-160F Section 22 multi-stroke lightning testing, including Waveform 4 (6.4/69 μs) Level 4 and Waveform 5A (40/120 μs) Level 4. Its 18,000 W peak pulse power rating and low RθJC enable reliable performance across repeated strokes. The MPLAD18KP70CAE3 data sheet confirms compliance for VWM = 70 V variants within the full MPLAD18KP7.0A–200CA family.
What is the thermal resistance junction-to-case for the MPLAD18KP70CAE3?
The MPLAD18KP70CAE3 has a junction-to-case thermal resistance (RθJC) of 0.7 °C/W, measured under defined mounting conditions on FR4 with recommended pad layout. This ultra-low value enables efficient heat transfer from the silicon die to the PCB copper or external heatsink, directly supporting multi-pulse surge endurance. The MPLAD18KP70CAE3 leverages its metal-base cathode as both electrical terminal and thermal interface.
How does the bidirectional construction of the MPLAD18KP70CAE3 affect its circuit implementation?
The bidirectional construction of the MPLAD18KP70CAE3 allows symmetric clamping for both positive and negative transients without polarity sensitivity - ideal for AC lines, differential buses, or floating grounds. Unlike unidirectional TVS diodes, the MPLAD18KP70CAE3 requires no orientation during placement and protects against reverse-voltage surges inherently. Its cathode is the metal base, and anode is the top surface pad - a fixed configuration confirmed in the package drawing.
MPLAD18KP70CAE3 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):
- 70V
- Voltage - Breakdown (Min):
- 77.8V
- Voltage - Clamping (Max) @ Ipp:
- 113V
- Current - Peak Pulse (10/1000µs):
- 160A
- 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
MPLAD18KP70CAE3 FAQ
1.How can I place an order for MPLAD18KP70CAE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD18KP70CAE3 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 MPLAD18KP70CAE3 reliable?
The price and inventory of MPLAD18KP70CAE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD18KP70CAE3 is usually 5 days.
3.What payment methods are accepted for MPLAD18KP70CAE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD18KP70CAE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD18KP70CAE3?
MPLAD18KP70CAE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD18KP70CAE3 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 MPLAD18KP70CAE3?
For technical support, including MPLAD18KP70CAE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD18KP70CAE3 requirements.
6.How does Aetrix verify that MPLAD18KP70CAE3 is sourced from the original manufacturer or authorized distributors?
All MPLAD18KP70CAE3 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 MPLAD18KP70CAE3 meets industry standards.
7.What is the process for return or replacement of MPLAD18KP70CAE3?
All MPLAD18KP70CAE3 units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD18KP70CAE3, 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 MPLAD18KP70CAE3 part is unused and in its original packaging.
Return procedure for MPLAD18KP70CAE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD18KP70CAE3 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…
