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Microchip Technology MPLAD36KP85CA
- Part No.:
- MPLAD36KP85CA
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD36KP85CA.pdf
- Description:
- TVS DIODE 85VWM 137VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:2,440
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Product details
Overview
MPLAD36KP85CA from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace, automotive, and industrial power systems. It delivers 36 kW peak pulse power at 10/1000 μs, clamps transients to ≤137 V at 263 A, and features a 78 V reverse standoff voltage (VWM) with ±5% breakdown tolerance (94.4–104.0 V). It meets RTCA DO-160F Waveform 4 Level 4 and IEC 61000-4-5 Class 5 (short distance) requirements.
For engineers reviewing the MPLAD36KP85CA datasheet, MPLAD36KP85CA pinout, MPLAD36KP85CA application, or MPLAD36KP85CA equivalent, this device is selected for secondary lightning protection, load dump suppression, and ESD/EFT hardening where low-profile SMT mounting, traceable high-reliability screening, and multi-stroke surge endurance are critical.
Technical Context
This TVS operates as a voltage-clamped crowbar device triggered by avalanche breakdown across its silicon junction. Its bidirectional construction enables symmetrical clamping of positive and negative transients without polarity sensitivity. The metal-base package provides direct thermal path to PCB copper, achieving 1.0 °C/W junction-to-case resistance.
It is characterized per IEC 61000-4-5 (42 Ω, 12 Ω, and 2 Ω source impedances), RTCA DO-160F Waveforms 4 and 5A, and AEC-Q101 stress testing. Standby leakage is limited to 10 μA at 78 V, and clamping response time is under 5 ns - enabling protection of downstream DC-DC converters, motor drivers, and avionics interface circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 36,000 W @ 10/1000 μs - sustains full-rated surge energy without degradation in single-event or multi-stroke scenarios. |
| Reverse Standoff Voltage (VWM) | 78 V - maximum continuous operating voltage before conduction begins; sets minimum system bus rating for safe integration. |
| Breakdown Voltage (VBR) | 94.4–104.0 V @ 5 mA - defines precise avalanche onset range; ensures predictable turn-on margin above VWM. |
| Max Clamping Voltage (VC) | 137 V @ 263 A - limits voltage seen by protected ICs during worst-case surge; enables 15 V–28 V rail compatibility. |
| Peak Pulse Current (IPP) | 263 A @ 10/1000 μs - quantifies surge current handling capacity; validates compliance with DO-160F Level 4 pin injection. |
| Thermal Resistance (RθJC) | 1.0 °C/W - enables efficient heat transfer to PCB copper pad; supports sustained operation under repeated surges when mounted per recommended layout. |
| Standby Leakage (ID) | 10 μA @ 78 V - negligible quiescent loading on 24/28 V aircraft or vehicle power buses. |
Pinout & Package
Package: PLAD - surface-mount, void-free thermosetting epoxy body (UL94V-0), metal base cathode contact, RoHS-compliant matte-tin plating. Dimensions: 12.32 × 10.54 × 5.08 mm (L × W × H), weight ≈1.85 g. Mounting requires thermal pad per datasheet layout (Ref. A=11.94 mm, B=5.85 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Top Surface) | Transient current entry point (bidirectional) | Accepts positive or negative surge polarity; symmetric conduction enables single-device protection of AC-coupled or floating lines. |
| Cathode (Metal Base) | Transient current return path / thermal interface | Directly bonded to PCB copper for low-inductance discharge and thermal dissipation; must be connected to ground plane or chassis. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping symmetry | Enables single-device protection of differential buses, ungrounded sensors, and AC signal paths without polarity concerns. |
| RTCA DO-160F Waveform 4 Level 4 compliance | Validated for 6.4/69 μs pin-injection transients up to 78 V VWM, supporting avionics interface board certification. |
| AEC-Q101 qualified | Qualified for automotive underhood applications including alternator load dump and battery reverse connection events. |
| MIL-PRF-19500 upscreening options | Available with M, MA, MX, or MXL reliability levels - supports mission-critical aerospace deployments requiring lot traceability and 3σ ID screening. |
| Low-profile SMT footprint | Replaces through-hole 5KP/15KP modules while maintaining >35 kW surge capability - saves board space and eliminates wave-solder process. |
Applications
| Avionics Power Distribution | Automotive Engine Control Unit (ECU) |
|---|---|
Use Scenario: Protecting 28 V DC distribution nodes feeding flight control computers and sensor interfaces against lightning-induced surges per DO-160 Section 22. IC Role / Device Role / Timing Role: Secondary surge clamp placed downstream of primary filters and upstream of DC-DC converters and ASIC power inputs. Use Value: Limits transient voltage to ≤137 V during 263 A surges, preventing latch-up or gate oxide damage in 3.3 V/5 V logic supplies. |
Use Scenario: Safeguarding ECU microcontroller I/O and CAN transceivers from alternator load dump spikes (ISO 7637-2 Pulse 5a/b) and jump-start transients. IC Role / Device Role / Timing Role: Bidirectional TVS across battery input rails and isolated signal lines to absorb both positive and negative polarity surges. Use Value: Withstands ≥1000 surge events at 263 A without parameter shift, ensuring long-term reliability in harsh under-hood environments. |
| Industrial Motor Drive DC Bus | Railway Signaling Interface |
Use Scenario: Clamping regenerative braking spikes and IGBT switching transients on 72–110 V DC bus lines in variable-frequency drives. IC Role / Device Role / Timing Role: Parallel-connected TVS across bus capacitors to limit overvoltage during rapid current interruption. Use Value: 1.0 °C/W RθJC allows direct thermal coupling to bus bar copper, sustaining repeated 36 kW pulses without thermal runaway. |
Use Scenario: Hardening 75 V signaling lines in European railway ETCS Level 2 balise interfaces against induced surges from nearby traction currents. IC Role / Device Role / Timing Role: Bidirectional transient suppressor installed at line entry connector to meet EN 50121-3-2 Class 3 immunity requirements. Use Value: Meets IEC 61000-4-5 Class 5 (42 Ω source) with 137 V clamping - maintains signal integrity below receiver overvoltage threshold. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ78CA | Lower PPP (600 W), smaller SMB package, 78 V VWM, 126 V clamping @ 4.3 A. | Suitable only for low-energy ESD/EFT; cannot meet DO-160F Level 4 or IEC 61000-4-5 Class 5. | Select SMBJ78CA only for cost-sensitive consumer electronics where surge energy is <100 J. |
| SMCJ78CA | Higher PPP (1500 W), larger SMC package, same 78 V VWM, 126 V clamping @ 12.1 A. | Supports moderate industrial transients but lacks multi-stroke validation and DO-160F qualification. | Choose SMCJ78CA for non-certified industrial controls where 1.5 kW peak power suffices and MIL/AEC screening is not required. |
Compared with SMBJ78CA and SMCJ78CA, the MPLAD36KP85CA delivers 24× and 24× higher peak pulse power respectively, with certified multi-stroke endurance, DO-160F compliance, and metal-base thermal performance - making it the only option for certified aerospace and high-reliability automotive power rail protection.
Availability
MPLAD36KP85CA is available at Aetrix Electronics and suitable for avionics power distribution, automotive ECU protection, and industrial motor drive DC bus applications requiring stable component supply, long-term lifecycle support, and certified surge performance.
Supply support for MPLAD36KP85CA 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 MPLAD series was developed specifically for high-power, surface-mount transient suppression in safety-critical platforms where DO-160, AEC-Q101, and MIL-PRF-19500 compliance are mandatory.
FAQ
What is the clamping voltage of MPLAD36KP85CA at its rated peak pulse current?
The MPLAD36KP85CA has a maximum clamping voltage (VC) of 137 V at 263 A peak pulse current under 10/1000 μs waveform conditions. This value is measured per IEC 61000-4-5 test methodology and guarantees that protected downstream circuitry will not experience voltages exceeding this threshold during full-rated surge events. The MPLAD36KP85CA maintains this clamping performance across its specified temperature range and after multiple surge strikes.
Is MPLAD36KP85CA qualified for automotive underhood use?
Yes, the MPLAD36KP85CA is AEC-Q101 qualified and rated for operation from −55 °C to +150 °C. Its construction - including void-free epoxy body, annealed matte-tin terminations, and validated surge endurance - meets automotive underhood requirements for load dump, jump-start, and ISO 7637-2 transient immunity. The MPLAD36KP85CA is commonly deployed on engine control unit (ECU) power inputs and CAN bus protection networks.
Does MPLAD36KP85CA require a heatsink for standard operation?
No external heatsink is required for MPLAD36KP85CA under typical single-pulse or low-duty-cycle surge conditions. Its 1.0 °C/W junction-to-case thermal resistance and metal-base package are designed to dissipate heat directly into the PCB copper pad per the recommended layout (11.94 mm × 5.85 mm). However, for repetitive surges above 0.05% duty factor, thermal derating per Figure 3 in RF01216 Rev B must be applied to ensure junction temperature remains within −55 °C to +150 °C limits.
How does the CA suffix affect the functionality of MPLAD36KP85CA?
The "CA" suffix in MPLAD36KP85CA denotes bidirectional construction, meaning the device provides symmetrical clamping for both positive and negative polarity transients. Unlike unidirectional variants (e.g., MPLAD36KP85A), the MPLAD36KP85CA has no anode/cathode orientation dependency and can protect AC-coupled or floating signal lines without external polarity management. Its breakdown and clamping characteristics are identical in both directions.
Can MPLAD36KP85CA be used for RTCA DO-160F Section 22 lightning protection?
Yes, the MPLAD36KP85CA 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 up to 78 V VWM. Its 36 kW rating, low clamping voltage, and metal-base thermal design make it suitable for secondary lightning protection in aircraft power distribution units, flight control interfaces, and sensor harnesses - as confirmed in Microsemi's RF01216 Rev B documentation.
MPLAD36KP85CA 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):
- 85V
- Voltage - Breakdown (Min):
- 94.4V
- Voltage - Clamping (Max) @ Ipp:
- 137V
- Current - Peak Pulse (10/1000µs):
- 263A
- 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
MPLAD36KP85CA FAQ
1.How can I place an order for MPLAD36KP85CA through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD36KP85CA 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 MPLAD36KP85CA reliable?
The price and inventory of MPLAD36KP85CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD36KP85CA is usually 5 days.
3.What payment methods are accepted for MPLAD36KP85CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD36KP85CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD36KP85CA?
MPLAD36KP85CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD36KP85CA 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 MPLAD36KP85CA?
For technical support, including MPLAD36KP85CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD36KP85CA requirements.
6.How does Aetrix verify that MPLAD36KP85CA is sourced from the original manufacturer or authorized distributors?
All MPLAD36KP85CA 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 MPLAD36KP85CA meets industry standards.
7.What is the process for return or replacement of MPLAD36KP85CA?
All MPLAD36KP85CA units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD36KP85CA, 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 MPLAD36KP85CA part is unused and in its original packaging.
Return procedure for MPLAD36KP85CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD36KP85CA Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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