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Microchip Technology MPLAD36KP280A
- Part No.:
- MPLAD36KP280A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD36KP280A.pdf
- Description:
- TVS DIODE 280VWM 451VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:5,150
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Product details
Overview
MPLAD36KP280A from Microsemi is a unidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace and automotive power systems. It delivers 36 kW peak pulse power at 10/1000 μs, clamps transients to ≤451 V at 80 A peak impulse current, and features a 280 V reverse standoff voltage with 311–345 V breakdown range. It is qualified to AEC-Q101 and meets RTCA DO-160 Section 22 multi-stroke lightning requirements.
For engineers reviewing the MPLAD36KP280A datasheet, MPLAD36KP280A pinout, MPLAD36KP280A application, or MPLAD36KP280A equivalent, this device is selected for high-reliability secondary lightning protection in avionics power rails, automotive load-dump circuits, and industrial DC bus interfaces where low thermal resistance, RoHS-compliant SMT packaging, and verified IEC 61000-4-5 Class 4 compliance (12 Ω source) are critical.
Technical Context
The MPLAD36KP280A operates as a silicon avalanche diode-based unidirectional TVS, leveraging controlled breakdown behavior to clamp fast-rising transients while maintaining low leakage (<10 μA at 280 V). Its metal-base package enables direct thermal coupling to PCB copper, achieving 1.0 °C/W junction-to-case thermal resistance and supporting sustained energy dissipation under repetitive surges at ≤0.05% duty cycle.
It is characterized for operation across –55°C to +150°C junction temperature, with a positive temperature coefficient of breakdown voltage (αV(BR) = 344 mV/°C), enabling predictable voltage drift over temperature. The device meets IEC 61000-4-2 ESD (±30 kV contact), IEC 61000-4-4 EFT (40 A), and IEC 61000-4-5 surge immunity up to Class 4 with 12 Ω source impedance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 36,000 W @ 10/1000 μs - enables single-device suppression of severe lightning-induced transients without cascading failure |
| Reverse Standoff Voltage (VWM) | 280 V - sets maximum continuous operating voltage before clamping initiates; matches 240 VAC-derived DC bus systems |
| Breakdown Voltage (V(BR)) | 311–345 V @ 5 mA - defines reliable avalanche onset threshold with tight 34 V tolerance band |
| Max Clamping Voltage (VC) | 451 V @ 80 A - limits downstream component stress during worst-case 10/1000 μs surge events |
| Standby Current (ID) | <10 μA @ 280 V - ensures negligible leakage power loss in always-on 280 V rail protection |
| Junction-to-Case Thermal Resistance | 1.0 °C/W - allows direct mounting to large copper pour for thermal management without heatsink |
| Operating Temperature Range | –55°C to +150°C - supports deployment in engine bay, avionics bays, and industrial enclosures |
Pinout & Package
Package: PLAD (Plastic Low-profile Anode-down) surface-mount package with metal base acting as cathode terminal; void-free UL94V-0 epoxy body; dimensions 12.32 × 10.54 × 5.08 mm (L × W × H); weight ~1.7–2.0 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (top-side metallization) | Transient current entry point | Connected to protected line; conducts surge current into cathode during avalanche |
| Cathode (metal base / bottom surface) | Current return path & thermal interface | Serves as primary heat sink interface; must be soldered to large copper area for RθJC = 1.0 °C/W |
Key Features
| Feature | Design Value |
|---|---|
| 36 kW peak pulse rating | Enables single-device protection against RTCA DO-160 Section 22 multi-stroke lightning waveforms without derating |
| AEC-Q101 qualification | Validates reliability for automotive powertrain and chassis applications under temperature cycling, humidity, and mechanical stress |
| RoHS-compliant matte-tin plating | Ensures lead-free solder compatibility and long-term intermetallic stability per MIL-STD-750 Method 2026 |
| IEC 61000-4-5 Class 4 compliance (12 Ω source) | Guarantees suppression of 4 kV surge events on 280 V DC lines in industrial control cabinets and avionics power supplies |
| Moisture Sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints-ready for standard SMT reflow without baking |
Applications
| Avionics Power Bus Protection | Automotive Load-Dump Suppression |
|---|---|
Use Scenario: Protecting 28 VDC aircraft utility buses from induced lightning transients per RTCA DO-160F Section 22 Waveform 4 (6.4/69 μs) and Waveform 5A (40/120 μs). IC Role / Device Role / Timing Role: Unidirectional TVS placed at bus input to clamp surges before they reach upstream converters and distribution modules. Use Value: Achieves Level 5 pin-injection protection up to 300 V standoff variants and maintains <100 ps response time to preserve signal integrity in flight-critical systems. | Use Scenario: Safeguarding engine control unit (ECU) power inputs during alternator load dump events in 24 V automotive systems. IC Role / Device Role / Timing Role: Primary surge clamp on battery feed line, absorbing 120 V/400 ms transients per ISO 7637-2 Pulse 5a. Use Value: Withstands 36 kW peak power and clamps to ≤451 V, preventing damage to 30 V-rated DC-DC regulators and microcontrollers. |
| Industrial DC Motor Drive Inputs | Railway Signaling Power Interfaces |
Use Scenario: Shielding 280 V DC link inputs of variable-frequency drives from switching transients and RFI generated by IGBT commutation. IC Role / Device Role / Timing Role: Fast-acting unidirectional suppressor mounted directly at drive terminal block to minimize inductive loop area. Use Value: 1.0 °C/W thermal resistance enables stable operation under repeated 0.05% duty-cycle surges without thermal runaway. | Use Scenario: Securing 280 V signaling power supplies in EN 50121-4-compliant railway trackside electronics exposed to traction-induced surges. IC Role / Device Role / Timing Role: Secondary lightning protector installed after primary gas discharge tube (GDT), handling residual energy per IEC 61000-4-5 Class 4 (12 Ω source). Use Value: Delivers verified 4 kV surge immunity at 280 V working voltage with no degradation after 1000+ surge cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ280A | Lower PPP (400 W), smaller SMA package, 1.0 mm pitch, 280 V VWM, 457 V VC @ 8.8 A | Rated only for light-duty industrial I/O protection-not suitable for DO-160 lightning or automotive load dump | Select when space-constrained PCBs require basic ESD/EFT protection below 1 kV, not high-energy surge events |
| Vishay V280CH8 | Higher PPP (5000 W), TO-277 package, 280 V VWM, 457 V VC @ 110 A, AEC-Q101 qualified | Lacks RTCA DO-160 certification and fails IEC 61000-4-5 Class 4 testing at 280 V due to higher clamping tail | Prefer for cost-sensitive automotive body electronics where full DO-160 compliance is not mandated |
Compared with SMAJ280A and V280CH8, the MPLAD36KP280A uniquely combines 36 kW surge capacity, DO-160F Section 22 validation, and 1.0 °C/W thermal resistance-making it the only option for certified avionics and heavy-duty automotive power rail protection at 280 V standoff.
Availability
MPLAD36KP280A is available at Aetrix Electronics and suitable for avionics power bus protection, automotive load-dump suppression, and industrial DC motor drive inputs requiring stable component supply, long-lifecycle support, and traceable high-reliability sourcing.
Supply support for MPLAD36KP280A 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 MPLAD36KP280A belongs to Microsemi's PLAD-series high-power TVS family, engineered specifically for certified lightning and load-dump protection in safety-critical DC power systems where thermal performance and multi-stroke endurance are mandatory.
FAQ
What is the maximum clamping voltage of the MPLAD36KP280A under standard test conditions?
The MPLAD36KP280A has a maximum clamping voltage (VC) of 451 V at 80 A peak pulse current under 10/1000 μs waveform conditions. This value is measured per Figure 3 in RF01216 Rev B and represents the upper limit of voltage seen by downstream circuitry during worst-case surge events, ensuring compatibility with 500 V-rated capacitors and MOSFETs in 280 V systems.
Is the MPLAD36KP280A suitable for use in automotive applications requiring AEC-Q101 qualification?
Yes, the MPLAD36KP280A is explicitly tested and qualified to AEC-Q101 standards as stated in the RF01216 datasheet. This qualification covers temperature cycling, highly accelerated stress testing, and mechanical shock-validating its suitability for under-hood automotive applications such as engine control units and battery management systems where 280 V DC bus protection is required.
Does the MPLAD36KP280A meet RTCA DO-160F Section 22 lightning protection requirements?
Yes, the MPLAD36KP280A is confirmed effective for RTCA DO-160F Section 22 multi-stroke lightning protection, specifically supporting Level 4 and Level 5 pin injection testing with Waveform 4 (6.4/69 μs) and Waveform 5A (40/120 μs) at standoff voltages up to 300 V. Its 36 kW rating and sub-100 ps response enable compliance in certified avionics power distribution units.
What is the thermal resistance and recommended mounting method for the MPLAD36KP280A?
The MPLAD36KP280A has a junction-to-case thermal resistance (RθJC) of 1.0 °C/W, achieved only when the metal base (cathode) is soldered to a minimum 11.94 mm × 5.85 mm copper pad per the datasheet pad layout. This direct thermal path eliminates need for external heatsinks and supports continuous operation under repetitive surges at ≤0.05% duty factor.
How does the MPLAD36KP280A differ from bidirectional variants like MPLAD36KP280CA?
The MPLAD36KP280A is unidirectional with cathode on the metal base, intended for DC line protection where polarity is fixed. In contrast, MPLAD36KP280CA is bidirectional, symmetrically clamping both polarities-used in AC-coupled or floating signal lines. Their clamping curves, thermal profiles, and DO-160 test coverage differ: the CA version supports lower-level pin injection but lacks Level 5 Waveform 5A coverage above 300 V.
MPLAD36KP280A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- Nonstandard SMD
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 280V
- Voltage - Breakdown (Min):
- 311V
- Voltage - Clamping (Max) @ Ipp:
- 451V
- Current - Peak Pulse (10/1000µs):
- 80A
- 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
MPLAD36KP280A FAQ
1.How can I place an order for MPLAD36KP280A through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD36KP280A 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 MPLAD36KP280A reliable?
The price and inventory of MPLAD36KP280A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD36KP280A is usually 5 days.
3.What payment methods are accepted for MPLAD36KP280A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD36KP280A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD36KP280A?
MPLAD36KP280A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD36KP280A 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 MPLAD36KP280A?
For technical support, including MPLAD36KP280A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD36KP280A requirements.
6.How does Aetrix verify that MPLAD36KP280A is sourced from the original manufacturer or authorized distributors?
All MPLAD36KP280A 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 MPLAD36KP280A meets industry standards.
7.What is the process for return or replacement of MPLAD36KP280A?
All MPLAD36KP280A units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD36KP280A, 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 MPLAD36KP280A part is unused and in its original packaging.
Return procedure for MPLAD36KP280A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD36KP280A Tags
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