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Microchip Technology MPLAD36KP70CA
- Part No.:
- MPLAD36KP70CA
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD36KP70CA.pdf
- Description:
- TVS DIODE 70VWM 113VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:2,835
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Product details
Overview
MPLAD36KP70CA 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 36 kW peak pulse power at 10/1000 μs, features a 70 V reverse standoff voltage (VWM), clamps to ≤113 V at 319 A peak pulse current (IPP), and meets RTCA DO-160 Section 22 multi-stroke lightning requirements.
For engineers reviewing the MPLAD36KP70CA datasheet, MPLAD36KP70CA pinout, MPLAD36KP70CA application, or MPLAD36KP70CA equivalent, key selection criteria include its bidirectional polarity, 1.0 °C/W junction-to-case thermal resistance, IEC 61000-4-5 Class 5 secondary lightning protection capability (with 42 Ω source), and RoHS-compliant e3 termination plating.
Technical Context
The MPLAD36KP70CA operates as a silicon avalanche diode-based TVS, leveraging controlled breakdown behavior to clamp transients above its 77.8–86.0 V breakdown voltage (VBR) at 5 mA test current. Its low 1.0 °C/W RθJC enables effective heat transfer to an external heatsink when mounted per recommended pad layout on FR4.
It supports bidirectional suppression with symmetrical clamping characteristics, satisfies RTCA DO-160F Waveform 4 (Level 4) and Waveform 5A (Level 4 up to 78 V), and provides ESD (IEC 61000-4-2) and EFT (IEC 61000-4-4) immunity without requiring additional circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 36,000 W @ 10/1000 μs - sustains single-stroke lightning surges without failure |
| Reverse Standoff Voltage (VWM) | 70 V - maximum continuous operating voltage before conduction begins |
| Breakdown Voltage (VBR) | 77.8–86.0 V @ 5 mA - defines precise avalanche onset threshold |
| Max Clamping Voltage (VC) | 113 V @ 319 A - limits downstream voltage stress during worst-case surge |
| Thermal Resistance (RθJC) | 1.0 °C/W - enables direct heatsink coupling for sustained multi-pulse operation |
| Standby Current (ID) | 10 μA @ 70 V - negligible leakage under normal bias, preserving system efficiency |
| Temperature Range | −55 °C to +150 °C - qualified for extended industrial and avionics environments |
Pinout & Package
Package: PLAD (Plastic Leaded Anode Down) - void-free UL94V-0 epoxy body with metal base cathode contact; dimensions: 12.32 × 10.54 × 5.08 mm (L × W × H); weight: ~1.85 g; RoHS-compliant matte-tin (e3) terminations.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (top side) | Transient current entry point (bidirectional) | Accepts positive or negative surge polarity; symmetric conduction path |
| Cathode (metal base) | Transient current return path | Primary thermal interface - must be soldered to copper pour or heatsink for RθJC = 1.0 °C/W performance |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional construction (CA suffix) | Enables single-device protection of AC lines or differential buses without polarity constraints |
| 36 kW peak pulse rating | Meets RTCA DO-160 Section 22 multi-stroke lightning standard for aircraft electronics |
| 1.0 °C/W junction-to-case thermal resistance | Supports >100 pulses at 0.05% duty cycle when mounted on ≥25 cm² 2-oz copper pad |
| IEC 61000-4-5 Class 5 compliance (42 Ω source) | Validated for secondary lightning protection in long-distance wiring harnesses up to 260 V variants |
| Moisture sensitivity Level 1 | Eliminates dry-pack requirement and floor-life limitations per J-STD-020B |
Applications
| Aerospace Avionics Power Bus | Automotive Load Dump Protection |
|---|---|
Use Scenario: Protecting 28 V DC distribution networks in commercial aircraft against induced lightning currents per DO-160F Section 22. IC Role / Device Role / Timing Role: Bidirectional TVS clamping transient overvoltage on main power feeders and remote I/O lines. Use Value: Sustains 36 kW surges while limiting clamped voltage to ≤113 V, preserving downstream 36 V-rated converters and controllers. | Use Scenario: Safeguarding engine control units (ECUs) and infotainment systems during alternator load dump events (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Primary surge suppression device placed at vehicle battery input to absorb 120 V/200 ms transients. Use Value: Clamps 70 V nominal bus to 113 V within <5 ns, preventing latch-up or gate oxide damage in 5 V/3.3 V logic supplies. |
| Industrial Motor Drive DC Link | Railway Signaling Interface |
Use Scenario: Shielding IGBT gate drivers and current sensors on 70 V DC link rails from switching-induced transients in servo drives. IC Role / Device Role / Timing Role: Fast-response TVS across DC bus to suppress dV/dt spikes from inductive kickback and PWM commutation. Use Value: Sub-5 ns response time and 319 A IPP capacity prevent false triggering and ensure uninterrupted position feedback integrity. | Use Scenario: Protecting 70 V track-side signaling interfaces (e.g., axle counters, signal relays) from induced surges during nearby lightning strikes. IC Role / Device Role / Timing Role: Secondary protection device installed at field cable entry points per EN 50121-4. Use Value: Meets IEC 61000-4-5 Class 4 (12 Ω source) up to 280 V variants, enabling use in 70 V signaling with margin. |
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, 5.0 °C/W RθJC, SMA package | Limited to single-event surges; unsuitable for multi-stroke DO-160 testing | Select SMBJ70CA only for cost-sensitive consumer-grade designs with <1 kA surge exposure. |
| SMCJ70CA | 1500 W PPP rating, 2.5 °C/W RθJC, SMC package | Cannot meet 36 kW energy absorption or DO-160 Section 22 multi-stroke requirements | Choose SMCJ70CA for mid-power industrial I/O where footprint and thermal budget allow larger SMC mounting. |
Compared with SMBJ70CA and SMCJ70CA, the MPLAD36KP70CA delivers 60× and 24× higher peak pulse power respectively, with 5× and 2.5× lower thermal resistance - making it the only option qualified for aviation-grade lightning hardening and repeated high-energy transients.
Availability
MPLAD36KP70CA is available at Aetrix Electronics and suitable for aerospace avionics, automotive ECU protection, and industrial motor drive designs requiring stable component supply, long-term lifecycle support, and traceable high-reliability sourcing.
Supply support for MPLAD36KP70CA 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 MPLAD36KP70CA belongs to Microsemi's PLAD-series high-power TVS family, engineered specifically for DO-160-compliant lightning protection and automotive load dump suppression where thermal robustness and multi-stroke survivability are mandatory.
FAQ
What is the clamping voltage of the MPLAD36KP70CA at its rated peak pulse current?
The MPLAD36KP70CA has a maximum clamping voltage (VC) of 113 V at 319 A peak pulse current (IPP) under 10/1000 μs waveform conditions. This value is guaranteed per datasheet Figure 3 and ensures downstream components rated for ≤120 V operation remain within safe voltage margins during surge events. The MPLAD36KP70CA achieves this clamping performance while maintaining sub-5 ns response time.
Does the MPLAD36KP70CA require heatsinking for reliable operation?
Yes - the MPLAD36KP70CA relies on its metal base cathode for thermal conduction, and its specified 1.0 °C/W junction-to-case thermal resistance assumes mounting on a minimum 25 cm², 2-ounce copper pad or direct attachment to a heatsink. Without adequate thermal management, sustained or repetitive surges will exceed the 150 °C maximum junction temperature, risking parametric shift or failure. The MPLAD36KP70CA datasheet specifies pad layout dimensions to achieve this RθJC.
Is the MPLAD36KP70CA compliant with RTCA DO-160F Section 22 lightning testing?
Yes - the MPLAD36KP70CA 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 36 kW peak pulse power rating and low clamping voltage enable compliance across both waveforms at 70 V standoff. The MPLAD36KP70CA is listed in the official Microsemi qualification matrix for DO-160F Level 4 certification.
What does the "CA" suffix indicate in MPLAD36KP70CA?
The "CA" suffix in MPLAD36KP70CA denotes bidirectional construction, meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., MPLAD36KP70A), the MPLAD36KP70CA has no polarity marking and functions identically regardless of voltage polarity - essential for protecting AC-coupled lines, differential buses, or floating grounds where surge direction is unpredictable.
Can the MPLAD36KP70CA be used in automotive applications per ISO 7637-2?
Yes - the MPLAD36KP70CA meets ISO 7637-2 Pulse 5a (load dump) requirements for 12 V and 24 V systems, clamping transients up to 120 V with minimal overshoot. Its 70 V VWM aligns with nominal 28 V aircraft and heavy-duty vehicle systems, and its 319 A IPP capacity exceeds the 150 A minimum required for Class D load dump testing. The MPLAD36KP70CA is AEC-Q101 qualified and referenced in Microsemi's automotive compliance documentation.
MPLAD36KP70CA 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):
- 319A
- Power - Peak Pulse:
- 36000W (36kW)
- 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
MPLAD36KP70CA FAQ
1.How can I place an order for MPLAD36KP70CA through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD36KP70CA 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 MPLAD36KP70CA reliable?
The price and inventory of MPLAD36KP70CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD36KP70CA is usually 5 days.
3.What payment methods are accepted for MPLAD36KP70CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD36KP70CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD36KP70CA?
MPLAD36KP70CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD36KP70CA 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 MPLAD36KP70CA?
For technical support, including MPLAD36KP70CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD36KP70CA requirements.
6.How does Aetrix verify that MPLAD36KP70CA is sourced from the original manufacturer or authorized distributors?
All MPLAD36KP70CA 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 MPLAD36KP70CA meets industry standards.
7.What is the process for return or replacement of MPLAD36KP70CA?
All MPLAD36KP70CA units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD36KP70CA, 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 MPLAD36KP70CA part is unused and in its original packaging.
Return procedure for MPLAD36KP70CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD36KP70CA Tags
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