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Microchip Technology MAPLAD36KP170A
- Part No.:
- MAPLAD36KP170A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD36KP170A.pdf
- Description:
- TVS DIODE 170VWM 275VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:7,330
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Product details
Overview
MAPLAD36KP170A 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 at ≤275 V under 10 A peak pulse current, and features a 170 V reverse standoff voltage (VWM) with 189–209 V breakdown range (V(BR)). It meets RTCA DO-160 Section 22 multi-stroke lightning requirements and IEC 61000-4-5 Class 4 secondary lightning protection with 12 Ω source impedance.
For engineers reviewing the MAPLAD36KP170A datasheet, MAPLAD36KP170A pinout, MAPLAD36KP170A application, or MAPLAD36KP170A equivalent, this device is selected for high-reliability DC bus protection where precise VWM alignment, low thermal resistance (RθJC = 1.0 °C/W), and verified 1000 A surge capability are critical - especially in avionics power distribution, engine control units, and 28 V aircraft subsystems.
Technical Context
The MAPLAD36KP170A employs an avalanche diode structure optimized for fast response (<5 ns clamping time) and high cumulative energy handling. Its metal-base package enables direct thermal coupling to heatsinks, supporting continuous operation at TC = 100°C with 71 W steady-state dissipation.
It operates as a unidirectional clamp referenced to ground, with cathode on the metal base (bottom side). Electrical behavior is defined by strict V(BR) tolerance (±5%), low ID standby current (≤10 μA @ 170 V), and temperature coefficient αV(BR) of +207 mV/°C - enabling predictable derating across –55°C to +150°C junction range.
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) | 170 V - maximum continuous operating voltage before conduction begins |
| Breakdown Voltage (V(BR)) | 189–209 V @ 5 mA - tight tolerance ensures consistent turn-on threshold |
| Clamping Voltage (VC) | 275 V @ 10 A IPP - limits downstream voltage stress during surge events |
| Junction-to-Case Thermal Resistance | 1.0 °C/W - enables efficient heat transfer to PCB copper or external heatsink |
| Standby Current (ID) | ≤10 μA @ VWM - negligible leakage in standby, critical for battery-backed systems |
| Clamping Response Time | <5 ns - suppresses fast transients before sensitive circuitry reacts |
Pinout & Package
MAPLAD36KP170A uses a thermally enhanced PLAD surface-mount package with metal base (cathode) and top-side anode terminal. The package measures 12.32 × 10.54 × 5.08 mm (L × W × H) and features void-free UL94V-0 epoxy molding and matte-tin plating per MIL-STD-750.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (top surface) | Positive surge path input | Connected to protected line (e.g., 28 V DC bus); conducts surge current toward cathode |
| Cathode (metal base) | Reference/return path | Must be soldered to large copper pour or heatsink for thermal and electrical return; defines polarity |
Key Features
| Feature | Design Value |
|---|---|
| High-reliability wafer lot traceability | Full fabrication and assembly traceability supports aerospace DO-160 and AEC-Q101 compliance |
| RTCA DO-160F Waveform 4 & 5A compliance | Validated for Level 4/5 pin-injection protection (6.4/69 μs and 40/120 μs) at 25°C |
| MIL-PRF-19500 upscreening option | Available M, MA, MX, MXL screening levels for extended temperature, burn-in, and parametric testing |
| IEC 61000-4-5 Class 4 support (12 Ω Zs) | Rated for 170 V VWM devices up to 280 V - confirms robustness against industrial lightning coupling |
| Moisture sensitivity Level 1 | No dry pack required per J-STD-020B - simplifies SMT handling and reflow logistics |
Applications
| Aerospace Power Distribution | Automotive Engine Control Unit (ECU) |
|---|---|
Use Scenario: Protection of 28 V DC main bus in commercial aircraft against multi-stroke lightning induced by DO-160 Section 22 waveforms. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between bus and chassis ground to limit transient overvoltage. Use Value: 36 kW PPP rating and <5 ns response ensure suppression of 1000 A surges without degradation across repeated strokes. |
Use Scenario: Load dump protection on 12 V/24 V power inputs of diesel ECU modules exposed to ISO 7637-2 Pulse 5a/b. IC Role / Device Role / Timing Role: Primary surge limiter on power rail, absorbing energy before it reaches DC-DC converters and microcontrollers. Use Value: 170 V VWM aligns precisely with 24 V system peak (≈28 V), avoiding false triggering while clamping at 275 V to protect 36 V-rated components. |
| Industrial Motor Drive DC Link | Railway Signaling Power Supply |
Use Scenario: Secondary protection on DC link capacitors of variable-frequency drives subjected to IEC 61000-4-5 Class 4 surges (42 Ω Zs). IC Role / Device Role / Timing Role: Fast-clamping TVS parallel to bulk capacitance to prevent overvoltage during switching transients or grid faults. Use Value: RθJC = 1.0 °C/W allows direct mounting to aluminum heatsink, sustaining repetitive 10/1000 μs surges without thermal runaway. |
Use Scenario: Input-stage surge protection for 110 V DC signaling power supplies in European railway infrastructure (EN 50121-4 compliant). IC Role / Device Role / Timing Role: Standoff-rated TVS on rectified AC input to absorb induced surges from nearby traction currents. Use Value: 170 V VWM provides margin above nominal 110 V DC while meeting EN 61000-4-5 Class 3 with 2 Ω source impedance (up to 130 V devices). |
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 SMAJ170A | Lower PPP (400 W), smaller SMA package, higher RθJA (65 °C/W), no DO-160 qualification | Suitable for consumer-grade 170 V rail protection; lacks aerospace surge endurance and thermal performance | Select only for cost-sensitive, non-mission-critical 170 V clamping where 36 kW rating is unnecessary |
| Vishay VMM170 | Same VWM (170 V), but 1500 W PPP, TO-277 package, no MIL-PRF-19500 screening, limited DO-160 data | Acceptable for automotive load dump where IEC 61000-4-5 Class 3 suffices; not validated for DO-160F Level 5 | Choose when board space permits TO-277 and full DO-160F compliance is not required |
Compared with SMAJ170A and VMM170, MAPLAD36KP170A delivers 90× higher peak power, 1/65th the thermal resistance, and certified DO-160F Level 4/5 performance - making it the sole choice for aviation-grade 170 V DC bus protection requiring multi-stroke reliability.
Availability
MAPLAD36KP170A is available at Aetrix Electronics and suitable for aerospace power distribution, automotive ECU protection, and industrial motor drive DC link applications requiring stable component supply, long-term lifecycle assurance, and traceable high-reliability sourcing.
Supply support for MAPLAD36KP170A 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 (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog, RF, and timing solutions for aerospace, defense, and industrial markets.
The MAPLAD36KP170A belongs to Microsemi's PLAD-series high-power TVS family, engineered specifically for DO-160-compliant lightning protection in harsh-environment power systems where thermal management and multi-stroke endurance are mandatory.
FAQ
What is the maximum clamping voltage of the MAPLAD36KP170A under rated surge conditions?
The MAPLAD36KP170A has a maximum clamping voltage (VC) of 275 V when subjected to a 10 A peak pulse current (IPP) under 10/1000 μs waveform conditions. This value is measured per standard test methods and ensures downstream components rated up to 300 V remain within safe operating limits during transient events. The clamping performance is guaranteed across the full operating temperature range.
Is the MAPLAD36KP170A qualified for RTCA DO-160F lightning testing?
Yes, the MAPLAD36KP170A is explicitly validated for RTCA DO-160F Section 22 multi-stroke lightning testing. It achieves Level 4 pin injection protection for Waveform 4 (6.4/69 μs) and Waveform 5A (40/120 μs) at 25°C. Documentation confirms its use in aircraft power distribution systems requiring DO-160F compliance, including both short- and long-distance configurations.
How does the thermal design of the MAPLAD36KP170A support high-repetition surge events?
The MAPLAD36KP170A achieves a junction-to-case thermal resistance (RθJC) of 1.0 °C/W via its metal-base PLAD package, enabling direct conduction of surge energy into PCB copper or external heatsinks. When mounted per recommended pad layout on FR4 with thermal vias, it sustains repetitive 10/1000 μs surges at ≤0.05% duty factor without exceeding TJ = 150°C - critical for avionics systems experiencing frequent transients.
Does the MAPLAD36KP170A meet AEC-Q101 stress testing requirements?
Yes, the MAPLAD36KP170A is tested in accordance with AEC-Q101 requirements for discrete semiconductors. This includes stress tests for high-temperature operating life, temperature cycling, and surge robustness. While primarily targeted at aerospace, its AEC-Q101 qualification confirms suitability for automotive under-hood applications such as engine control modules and battery management systems.
What is the polarity configuration and mounting orientation for the MAPLAD36KP170A?
The MAPLAD36KP170A is a unidirectional TVS with cathode on the metal base (bottom side) and anode on the top surface. Correct mounting requires soldering the metal base directly to a large copper area or heatsink to serve as both electrical return and thermal path. Polarity marking is present only on unidirectional versions, and reverse installation will prevent proper clamping function.
MAPLAD36KP170A 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):
- 170V
- Voltage - Breakdown (Min):
- 189V
- Voltage - Clamping (Max) @ Ipp:
- 275V
- Current - Peak Pulse (10/1000µs):
- 131A
- 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
MAPLAD36KP170A FAQ
1.How can I place an order for MAPLAD36KP170A through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD36KP170A 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 MAPLAD36KP170A reliable?
The price and inventory of MAPLAD36KP170A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD36KP170A is usually 5 days.
3.What payment methods are accepted for MAPLAD36KP170A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD36KP170A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD36KP170A?
MAPLAD36KP170A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD36KP170A 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 MAPLAD36KP170A?
For technical support, including MAPLAD36KP170A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD36KP170A requirements.
6.How does Aetrix verify that MAPLAD36KP170A is sourced from the original manufacturer or authorized distributors?
All MAPLAD36KP170A 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 MAPLAD36KP170A meets industry standards.
7.What is the process for return or replacement of MAPLAD36KP170A?
All MAPLAD36KP170A units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD36KP170A, 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 MAPLAD36KP170A part is unused and in its original packaging.
Return procedure for MAPLAD36KP170A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD36KP170A Tags
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