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Microchip Technology MAPLAD36KP70CAE3
- Part No.:
- MAPLAD36KP70CAE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD36KP70CAE3.pdf
- Description:
- TVS DIODE 70VWM 113VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:9,772
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Product details
Overview
MAPLAD36KP70CAE3 from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace and automotive systems. It delivers 36 kW peak pulse power at 10/1000 μs, clamps at ≤113 V under 319 A peak impulse current, and features a 70 V reverse standoff voltage (VWM), RoHS-compliant e3 plating, and thermal resistance of 1.0 °C/W junction-to-case - deployed in lightning protection circuits per RTCA DO-160 Section 22.
For engineers reviewing the MAPLAD36KP70CAE3 datasheet, MAPLAD36KP70CAE3 pinout, MAPLAD36KP70CAE3 application, or MAPLAD36KP70CAE3 equivalent, key selection criteria include bidirectional polarity, 70 V VWM matching system rail voltage, 113 V max clamping at 319 A, compliance with IEC 61000-4-5 (Class 5, 42 Ω source), and RTCA DO-160F Waveform 4 Level 4 capability up to 70 V standoff.
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 (1.0 °C/W) enables effective heat transfer to PCB copper pads or heatsinks, supporting multi-stroke surge endurance per RTCA DO-160. The bidirectional construction allows symmetrical clamping for AC-coupled or floating signal lines.
It meets secondary lightning protection requirements under IEC 61000-4-5 across multiple source impedances (2 Ω, 12 Ω, 42 Ω), with validated performance up to Class 5 for short-distance coupling. Standby leakage ID is ≤10 μA at 70 V, and temperature coefficient αV(BR) is +84 mV/°C - enabling predictable derating over -55°C to +150°C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - maximum continuous working voltage; must exceed peak system rail voltage to avoid standby conduction |
| V(BR) min/max | 77.8–86.0 V - breakdown threshold range at 5 mA; defines minimum clamping onset point |
| VC @ IPP | ≤113 V at 319 A - maximum clamped voltage during 10/1000 μs surge; determines protected circuit's worst-case overvoltage |
| PPP | 36,000 W - peak pulse power handling at 10/1000 μs; validates robustness against lightning transients |
| RθJC | 1.0 °C/W - junction-to-case thermal resistance; enables direct thermal path to heatsink or large copper pour |
| ID @ VWM | ≤10 μA - standby leakage at rated standoff; ensures negligible power loss in always-on protection circuits |
| αV(BR) | +84 mV/°C - positive temperature coefficient; breakdown voltage rises predictably with junction temperature |
Pinout & Package
MAPLAD36KP70CAE3 uses a PLAD (Plastic Leaded Anode/Cathode) surface-mount package with metal base cathode contact on the bottom side. The device has two terminals: anode and cathode, with polarity marked only on unidirectional variants; bidirectional versions (CA suffix) have symmetric clamping and no polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive terminal for unidirectional operation; common node for bidirectional clamping | Connected to line or signal being protected; forms one side of the clamping path to ground or rail |
| Cathode | Negative terminal for unidirectional operation; common node for bidirectional clamping | Mounted to metal baseplate - serves as primary thermal and electrical return path; requires direct connection to large copper area or heatsink |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables symmetrical overvoltage suppression on AC lines, differential buses, or floating sensors without polarity constraints |
| 36 kW 10/1000 μs rating | Validated for multi-stroke lightning events per RTCA DO-160 Section 22, eliminating need for external series impedance in many aircraft interfaces |
| 1.0 °C/W RθJC | Allows >70% of surge energy to be conducted away from junction via metal baseplate, reducing thermal stress during repeated surges |
| IEC 61000-4-5 Class 5 compliance (42 Ω) | Meets highest severity level for secondary lightning immunity in industrial and avionics enclosures with minimal layout changes |
| e3 RoHS-compliant matte-tin plating | Ensures reliable solderability per MIL-STD-750 Method 2026 and compatibility with lead-free reflow profiles up to 260°C |
Applications
| Aircraft Avionics Power Input | Automotive DC Power Distribution |
|---|---|
Use Scenario: Protection of 28 V DC power inputs to flight control computers and sensor modules against lightning-induced surges per RTCA DO-160F Section 22. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed between input rail and chassis ground to limit transient overvoltage to <113 V during 10/1000 μs waveforms. Use Value: Enables compliance with Level 4 pin-injection (Waveform 4) and Class 5 secondary lightning (42 Ω source) without additional filtering or derating. | Use Scenario: Load-dump protection on 24 V battery-fed ECUs in commercial vehicles, where alternator transients reach 120 V for 400 ms. IC Role / Device Role / Timing Role: Standoff-rated TVS connected across supply rails to clamp sustained overvoltages above 70 V while surviving repetitive 319 A pulses. Use Value: Eliminates need for series resistors or active regulators by sustaining 36 kW surges with <10 μA leakage at nominal 28 V operation. |
| Industrial Ethernet PHY Interface | Railway Signaling Data Lines |
Use Scenario: Surge protection on 100BASE-TX MDI pairs exposed to induced RFI and EFT per IEC 61000-4-4 in factory automation gateways. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential pair and chassis ground to suppress common-mode transients up to 4 kV contact discharge. Use Value: Achieves <113 V clamping at 319 A while maintaining signal integrity due to low capacitance (<100 pF typical) and fast response (<5 ns). | Use Scenario: Secondary lightning protection for 72 V signaling lines in train control interlocking systems compliant with EN 50121-4. IC Role / Device Role / Timing Role: TVS installed at line entry point to limit surge energy entering trackside cabinets using 42 Ω source impedance test setup. Use Value: Meets IEC 61000-4-5 Class 5 requirements for long-distance coupling (70 V VWM variant) without derating or parallel staging. |
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 | Lower PPP (600 W), SMA package, RθJC ≈ 40 °C/W, VWM = 70 V, VC = 115 V @ 5.3 A | Only suitable for single-event, low-repetition surges (e.g., ESD/EFT); cannot meet RTCA DO-160 multi-stroke requirements | Select SMBJ70CA only for cost-sensitive consumer electronics where 36 kW rating is unnecessary. |
| SMCJ70CA | PPP = 1500 W, SMC package, RθJC ≈ 15 °C/W, VWM = 70 V, VC = 115 V @ 13 A | Supports higher repetition than SMBJ but still insufficient for aircraft lightning testing; lacks DO-160 qualification data | Choose SMCJ70CA for industrial PLC I/O protection where Class 3/4 IEC 61000-4-5 suffices and 36 kW is over-spec. |
Compared with SMBJ70CA and SMCJ70CA, MAPLAD36KP70CAE3 provides 24× and 24× higher peak pulse power respectively, 40× and 15× lower thermal resistance, and documented compliance with RTCA DO-160F Section 22 - making it the only option qualified for primary lightning protection in certified avionics.
Availability
MAPLAD36KP70CAE3 is available at Aetrix Electronics and suitable for aerospace power conditioning, automotive load-dump protection, and industrial Ethernet surge immunity requiring stable component supply across extended production lifecycles.
Supply support for MAPLAD36KP70CAE3 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 MAPLAD family targets high-energy transient suppression in mission-critical systems, with emphasis on RTCA DO-160, IEC 61000-4-5, and AEC-Q101 compliance for aviation, automotive, and rail applications.
FAQ
What is the clamping voltage of MAPLAD36KP70CAE3 at its rated peak pulse current?
The MAPLAD36KP70CAE3 has a maximum clamping voltage (VC) of 113 V when subjected to its rated peak pulse current of 319 A under 10/1000 μs waveform conditions. This value is measured at the device terminals and represents the upper bound of overvoltage seen by downstream circuitry during surge events - critical for ensuring protected ICs remain within absolute maximum ratings.
Does MAPLAD36KP70CAE3 meet RTCA DO-160F Section 22 lightning requirements?
Yes, MAPLAD36KP70CAE3 is specifically validated for RTCA DO-160F Section 22 multi-stroke lightning testing. Its 36 kW peak pulse power rating, low RθJC (1.0 °C/W), and documented performance at Waveform 4 (Level 4 up to 70 V) and Waveform 5A confirm suitability for primary and secondary lightning protection in certified avionics equipment.
How does the bidirectional construction of MAPLAD36KP70CAE3 affect its circuit placement?
The bidirectional construction of MAPLAD36KP70CAE3 eliminates polarity sensitivity, allowing placement across any two nodes requiring symmetrical overvoltage protection - such as differential data lines, AC power inputs, or floating sensor outputs. Unlike unidirectional TVS diodes, MAPLAD36KP70CAE3 does not require orientation checks during assembly and supports common-mode surge suppression without additional components.
What thermal management is required for MAPLAD36KP70CAE3 in high-duty-cycle applications?
MAPLAD36KP70CAE3 requires direct thermal coupling from its metal baseplate to a minimum 10 cm² copper pour or external heatsink to maintain junction temperature below 150°C during repetitive surges. Its RθJC of 1.0 °C/W assumes full metal pad contact per the recommended footprint (0.470" × 0.230"); inadequate copper area increases thermal resistance and risks premature failure under multi-stroke conditions.
Is MAPLAD36KP70CAE3 compliant with AEC-Q101 for automotive use?
Yes, MAPLAD36KP70CAE3 is tested in accordance with AEC-Q101 requirements for discrete semiconductors. This qualification covers stress tests including HTGB, HTRB, TST, and surge endurance - confirming reliability for under-hood automotive applications such as engine control units and battery management systems exposed to load-dump transients.
MAPLAD36KP70CAE3 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
MAPLAD36KP70CAE3 FAQ
1.How can I place an order for MAPLAD36KP70CAE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD36KP70CAE3 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 MAPLAD36KP70CAE3 reliable?
The price and inventory of MAPLAD36KP70CAE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD36KP70CAE3 is usually 5 days.
3.What payment methods are accepted for MAPLAD36KP70CAE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD36KP70CAE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD36KP70CAE3?
MAPLAD36KP70CAE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD36KP70CAE3 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 MAPLAD36KP70CAE3?
For technical support, including MAPLAD36KP70CAE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD36KP70CAE3 requirements.
6.How does Aetrix verify that MAPLAD36KP70CAE3 is sourced from the original manufacturer or authorized distributors?
All MAPLAD36KP70CAE3 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 MAPLAD36KP70CAE3 meets industry standards.
7.What is the process for return or replacement of MAPLAD36KP70CAE3?
All MAPLAD36KP70CAE3 units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD36KP70CAE3, 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 MAPLAD36KP70CAE3 part is unused and in its original packaging.
Return procedure for MAPLAD36KP70CAE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD36KP70CAE3 Tags
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