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Microchip Technology MPLAD36KP120CA
- Part No.:
- MPLAD36KP120CA
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD36KP120CA.pdf
- Description:
- TVS DIODE 120VWM 193VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:4,051
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Product details
Overview
MPLAD36KP120CA 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 ≤193 V under 187 A peak impulse current, and features 120 V reverse standoff voltage (VWM) with ±5% breakdown voltage tolerance (133–147 V). It is qualified to AEC-Q101 and meets RTCA DO-160 Section 22 multi-stroke lightning requirements.
For engineers reviewing the MPLAD36KP120CA datasheet, MPLAD36KP120CA pinout, MPLAD36KP120CA application, or MPLAD36KP120CA equivalent, this device is selected for secondary lightning protection per IEC 61000-4-5 (42 Ω, 12 Ω, and 2 Ω source impedances), pin-injection immunity per RTCA/DO-160F Waveforms 4 and 5A, and high-reliability ESD/EFT suppression in avionics power distribution and engine control units.
Technical Context
The MPLAD36KP120CA operates as a bidirectional avalanche diode-based TVS, leveraging silicon junction design to clamp transients symmetrically across polarity. Its low thermal resistance (RθJC = 1.0 °C/W) enables efficient heat transfer to the PCB copper pad, supporting sustained multi-pulse operation at ≤0.05% duty factor.
It complies with IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and IEC 61000-4-5 (surge) standards, and is validated for RTCA DO-160F Waveform 4 (6.4/69 μs) Level 5 up to 300 V standoff and Waveform 5A (40/120 μs) Level 5 up to 38 V standoff - confirming its suitability for aircraft-level pin-injection hardening.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 120 V - maximum continuous operating voltage before clamping initiates; sets system voltage margin for 28 V/115 VAC avionics buses. |
| V(BR) min/max | 133–147 V - guaranteed breakdown range at 5 mA; ensures consistent turn-on threshold across temperature and lot variance. |
| VC @ IPP | 193 V max at 187 A - clamping voltage during full-rated 10/1000 μs surge; defines worst-case overvoltage seen by protected ICs. |
| PPP | 36,000 W - peak pulse power handling at 10/1000 μs; enables single-device protection against lightning-induced surges per DO-160. |
| RθJC | 1.0 °C/W - junction-to-case thermal resistance; requires direct metal-base mounting to heatsink or large copper pour for thermal management. |
| ID @ VWM | 10 μA max - standby leakage at rated standoff; negligible power loss in always-on 28 V DC systems. |
| αV(BR) | 145 mV/°C - temperature coefficient of breakdown voltage; allows accurate derating above 25°C ambient per Figure 3. |
Pinout & Package
Package: PLAD (Plastic Low-profile Anode-down) surface-mount package with metal base cathode terminal. Dimensions: 12.32 × 10.54 × 5.08 mm (L × W × H), weight ≈ 1.7–2.0 g. Cathode is the metal base (bottom side); anode is top-side metallization.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Metal Base (Bottom) | Cathode | Primary heat path and high-current return node; must be soldered to ≥250 mm² copper area or external heatsink. |
| Top-Side Metallization | Anode | Transient current entry point; connects to protected line via short trace; polarity-marked on unidirectional variants only. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables symmetrical surge suppression on AC-coupled or floating lines without polarity concerns - critical for MIL-STD-704/DO-160 power inputs. |
| AEC-Q101 qualification | Validated for automotive-grade reliability including HTOL, TC, and UHAST - supports dual-use avionics and vehicle ECUs. |
| RTCA DO-160F Waveform 4 Level 5 compliance | Withstands 6.4/69 μs pin-injection transients up to 300 V standoff rating - satisfies aircraft data bus and sensor interface hardening. |
| Moisture Sensitivity Level 1 | No dry-pack or baking required prior to reflow; compatible with standard J-STD-020B assembly processes. |
| RoHS-compliant (e3) | Tin-plated terminals meet lead-free soldering requirements without compromising surge robustness or thermal cycling performance. |
Applications
| Avionics Power Input Protection | Automotive Engine Control Unit (ECU) |
|---|---|
Use Scenario: Protecting 28 V DC primary power input of flight management computers against load dump and lightning-induced surges per DO-160 Section 22. IC Role / Device Role / Timing Role: Primary secondary surge protector placed upstream of DC-DC converters and LDOs; clamps within <5 ns to limit voltage stress on downstream regulators. Use Value: Eliminates need for series fusing or additional MOV stages while maintaining 120 V standoff margin above nominal bus voltage. | Use Scenario: Safeguarding CAN and LIN bus interfaces in diesel engine control modules exposed to ISO 7637-2 pulses and alternator load dump. IC Role / Device Role / Timing Role: Bidirectional line protector on signal lines referenced to chassis ground; handles both positive and negative transients without polarity reversal. Use Value: Achieves Class 4 IEC 61000-4-5 compliance (42 Ω source) at 120 V standoff - exceeds OEM requirements for Tier-1 powertrain systems. |
| Industrial Motor Drive DC Bus | Railway Signaling Interface |
Use Scenario: Suppressing switching transients on 110 V DC traction converter auxiliary supplies subject to IEC 61000-4-4 EFT bursts and repetitive commutation spikes. IC Role / Device Role / Timing Role: High-energy shunt clamp on DC link capacitor input; activated only during >133 V overvoltage events to preserve efficiency during normal operation. Use Value: 36 kW PPP rating sustains >1000 multi-stroke surges at 0.05% duty cycle - extends service life beyond 10-year rail infrastructure deployments. | Use Scenario: Hardening Ethernet PHY and RS-485 interfaces in trackside signaling controllers against induced lightning surges per EN 50121-4. IC Role / Device Role / Timing Role: Secondary protection stage after gas discharge tube (GDT) front-end; provides fast (<5 ns) low-clamp response to residual transients. Use Value: 193 V clamping voltage at 187 A ensures protected PHY ICs remain below absolute maximum ratings even during worst-case 2 Ω source impedance surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ120CA | 600 W PPP rating, 120 V VWM, DO-214AA package, RθJC ≈ 40 °C/W | Limited to single-stroke or low-duty-cycle surges; unsuitable for DO-160 multi-stroke validation | Select when cost-sensitive industrial designs require basic ESD/EFT protection without lightning-level energy handling. |
| SMCJ120CA | 1500 W PPP rating, same VWM, DO-214AB package, RθJC ≈ 15 °C/W | Cannot sustain repeated 36 kW surges; fails after ≤5 strokes at full rating per JEDEC JESD22-A114 | Choose for automotive body electronics where AEC-Q101 is required but DO-160 compliance is not mandated. |
Compared with SMBJ120CA and SMCJ120CA, the MPLAD36KP120CA delivers 24× and 24× higher peak pulse power respectively, with 40× and 15× lower thermal resistance - enabling reliable multi-stroke lightning protection in safety-critical avionics where single-point failure is unacceptable.
Availability
MPLAD36KP120CA is available at Aetrix Electronics and suitable for avionics power input protection, automotive ECU surge hardening, and industrial motor drive DC bus protection requiring stable component supply across extended production lifecycles.
Supply support for MPLAD36KP120CA 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 MPLAD36KP120CA belongs to Microsemi's PLAD-series high-power TVS family, engineered specifically for multi-stroke lightning and load-dump protection in mission-critical platforms where failure is not an option.
FAQ
What is the clamping voltage of MPLAD36KP120CA at its rated peak pulse current?
The MPLAD36KP120CA has a maximum clamping voltage (VC) of 193 V at its rated peak pulse current (IPP) of 187 A under 10/1000 μs waveform conditions. This value is measured per Figure 3 in the RF01216 datasheet and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The MPLAD36KP120CA maintains this clamping performance across its qualified temperature range of –55°C to +150°C.
Is MPLAD36KP120CA compliant with RoHS and AEC-Q101 standards?
Yes, MPLAD36KP120CA is RoHS compliant (e3 marking) and qualified to AEC-Q101 Rev D for stress testing including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress test. These qualifications confirm its suitability for automotive and dual-use avionics applications. The MPLAD36KP120CA also undergoes 3σ lot norm screening on standby current (ID) and full surge testing per production lot.
How does the PLAD package of MPLAD36KP120CA improve thermal performance compared to standard SMC packages?
The PLAD package of MPLAD36KP120CA achieves a junction-to-case thermal resistance (RθJC) of 1.0 °C/W - 15× lower than typical SMC packages (~15 °C/W) - due to its void-free transfer-molded epoxy construction and direct metal-base thermal path. This allows the MPLAD36KP120CA to dissipate 36 kW surges into PCB copper or external heatsinks without thermal runaway. Mounting per the specified pad layout (Ref. A=11.94 mm, B=5.85 mm) is mandatory to realize this spec.
Can MPLAD36KP120CA be used for RTCA DO-160F Section 22 lightning testing?
Yes, MPLAD36KP120CA is explicitly validated for RTCA DO-160F Section 22 multi-stroke lightning testing, as confirmed in the RF01216 datasheet. It meets Level 5 pin-injection requirements for Waveform 4 (6.4/69 μs) up to 300 V standoff and supports long-distance Class 5 lightning protection per IEC 61000-4-5 with 2 Ω source impedance. The MPLAD36KP120CA's 36 kW rating and <5 ns response enable repeatable pass/fail performance across full test sequences.
What is the standoff voltage tolerance and temperature coefficient of MPLAD36KP120CA?
The MPLAD36KP120CA has a reverse standoff voltage (VWM) of 120 V with no explicit tolerance band stated, but its breakdown voltage (V(BR)) is specified as 133–147 V at 5 mA - implying ±5% tolerance relative to nominal 140 V midpoint. Its temperature coefficient of breakdown voltage (αV(BR)) is +145 mV/°C, meaning V(BR) increases linearly with junction temperature. This coefficient is used to derate V(BR) upward for high-temperature operation per Figure 3 in the MPLAD36KP120CA datasheet.
MPLAD36KP120CA 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):
- 120V
- Voltage - Breakdown (Min):
- 133V
- Voltage - Clamping (Max) @ Ipp:
- 193V
- Current - Peak Pulse (10/1000µs):
- 187A
- 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
MPLAD36KP120CA FAQ
1.How can I place an order for MPLAD36KP120CA through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD36KP120CA 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 MPLAD36KP120CA reliable?
The price and inventory of MPLAD36KP120CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD36KP120CA is usually 5 days.
3.What payment methods are accepted for MPLAD36KP120CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD36KP120CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD36KP120CA?
MPLAD36KP120CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD36KP120CA 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 MPLAD36KP120CA?
For technical support, including MPLAD36KP120CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD36KP120CA requirements.
6.How does Aetrix verify that MPLAD36KP120CA is sourced from the original manufacturer or authorized distributors?
All MPLAD36KP120CA 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 MPLAD36KP120CA meets industry standards.
7.What is the process for return or replacement of MPLAD36KP120CA?
All MPLAD36KP120CA units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD36KP120CA, 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 MPLAD36KP120CA part is unused and in its original packaging.
Return procedure for MPLAD36KP120CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD36KP120CA Tags
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