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Microchip Technology MAPLAD36KP17CA
- Part No.:
- MAPLAD36KP17CA
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD36KP17CA.pdf
- Description:
- TVS DIODE 17VWM 28.8VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:6,611
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Product details
Overview
MAPLAD36KP17CA 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, features a 17 V reverse standoff voltage (VWM), clamps to ≤28.8 V at 1250 A IPP, and meets RTCA DO-160 Section 22 multi-stroke lightning requirements. It is used in aircraft avionics power inputs for secondary lightning protection.
For engineers reviewing the MAPLAD36KP17CA datasheet, MAPLAD36KP17CA pinout, MAPLAD36KP17CA application, or MAPLAD36KP17CA equivalent, key selection criteria include its bidirectional polarity, 1.0 °C/W junction-to-case thermal resistance, IEC 61000-4-5 Class 5 compliance with 42 Ω source impedance, and RoHS-compliant e3 plating - all critical for high-reliability airborne and vehicle electronics.
Technical Context
This TVS diode operates as a voltage-clamped crowbar device during transients, leveraging avalanche breakdown to divert surge current away from protected circuitry. Its low RθJC (1.0 °C/W) enables effective heat transfer to an external heatsink when mounted per recommended pad layout on FR4.
It supports bidirectional transient suppression without polarity sensitivity, making it suitable for AC-coupled or floating signal/power lines. Electrical performance is validated per AEC-Q101 and MIL-PRF-19500 screening options (MX/MXL levels), with full lot traceability and 100% surge testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 36,000 W @ 10/1000 μs - sustains single-stroke lightning surges up to 36 kW without failure |
| Reverse Standoff Voltage (VWM) | 17 V - maximum continuous operating voltage before clamping initiates; matches 12 V automotive/avionics bus peaks |
| Breakdown Voltage (V(BR)) | 18.9–20.9 V @ 5 mA - ensures reliable turn-on margin above VWM for robust overvoltage response |
| Clamping Voltage (VC) | ≤28.8 V @ 1250 A IPP - limits downstream voltage stress to safe levels for 15–24 V system ICs |
| Junction-to-Case Thermal Resistance | 1.0 °C/W - enables direct thermal coupling to heatsink for repeated surge handling under 0.05% duty cycle |
| Surge Current (IPP) | 1250 A @ 10/1000 μs - verified impulse rating for DO-160F Waveform 4 Level 4/5 and IEC 61000-4-5 Class 5 |
| Moisture Sensitivity Level | Level 1 per J-STD-020B - no dry pack required; supports standard SMT reflow without baking |
Pinout & Package
MAPLAD36KP17CA uses a thermally optimized surface-mount PLAD package with metal base cathode (bidirectional symmetry eliminates polarity concerns). The two-terminal design mounts directly to copper pour for minimal thermal impedance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 (Anode-side marking) | Anode connection (bidirectional) | Electrically symmetric; either terminal may serve as input or return path in AC or floating circuits |
| Terminal 2 (Metal base) | Cathode / thermal interface | Directly bonded to PCB copper pour or heatsink; primary thermal conduction path (RθJC = 1.0 °C/W) |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional construction (CA suffix) | Enables protection of AC-coupled or differential lines without polarity constraints or external rectification |
| 36 kW PPP rating @ 10/1000 μs | Meets RTCA DO-160 Section 22 multi-stroke lightning test requirements for commercial aircraft systems |
| 1.0 °C/W RθJC | Supports >1000 A surge repetition at 0.05% duty factor when mounted on ≥1 in² 2 oz copper with thermal vias |
| AEC-Q101 qualified | Validated for automotive underhood environments including temperature cycling, HTRB, and surge endurance |
| e3 RoHS-compliant matte-tin plating | Ensures solderability per MIL-STD-750 Method 2026 and compatibility with lead-free reflow profiles (260 °C, 10 s) |
Applications
| Avionics Power Input Protection | Automotive Load Dump Suppression |
|---|---|
|
Use Scenario: 28 V DC power feed to flight control computers subjected to DO-160F Section 22 lightning-induced surges. IC Role / Device Role / Timing Role: Primary secondary surge clamp on main power rail, placed upstream of DC/DC converters and EMI filters. Use Value: Limits clamped voltage to ≤28.8 V during 1250 A transients, preserving input stage reliability of radiation-tolerant PMICs and FPGAs. |
Use Scenario: 12 V battery line in engine control units exposed to ISO 7637-2 Pulse 5a load dump events. IC Role / Device Role / Timing Role: High-power TVS placed at connector entry point to absorb 36 kW energy bursts before reaching MCU power supply. Use Value: Clamps within <5 ns to protect downstream LDOs and CAN transceivers without requiring series impedance or derating. |
| Industrial Motor Drive DC Bus | Railway Signaling Interface |
|
Use Scenario: 400 V DC bus in variable-frequency drives subject to IGBT switching transients and induced RFI. IC Role / Device Role / Timing Role: Bidirectional clamp across bus rails to suppress common-mode and differential-mode voltage spikes. Use Value: Withstands repetitive 1250 A surges at 0.05% duty cycle due to low RθJC and void-free epoxy package, extending service life. |
Use Scenario: 72 V signaling interface in train communication networks complying with EN 50121-3-2 surge immunity. IC Role / Device Role / Timing Role: Secondary protection element after gas discharge tube (GDT), providing fast low-voltage clamping. Use Value: Achieves Class 4 immunity per IEC 61000-4-5 (42 Ω source) with clamping voltage ≤28.8 V - below rail overvoltage thresholds of RS-485 PHYs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ17CA | Lower PPP (600 W), smaller SMB package, RθJA = 40 °C/W, no AEC-Q101 or DO-160 qualification | Suitable only for consumer-grade or non-safety-critical 12 V circuits; cannot meet aircraft lightning standards | Select MAPLAD36KP17CA when 36 kW surge handling, thermal management, or aerospace certification is required. |
| SMCJ17CA | PPP = 1500 W, SMC package, RθJC ≈ 2.5 °C/W, limited to IEC 61000-4-5 Class 3, not DO-160 tested | Acceptable for industrial automation with moderate surge exposure but insufficient for avionics or automotive load dump | Choose MAPLAD36KP17CA for mission-critical systems demanding verified multi-stroke lightning resilience and thermal robustness. |
Compared with SMBJ17CA and SMCJ17CA, MAPLAD36KP17CA provides 24× and 24× higher peak pulse power respectively, certified thermal performance for heatsink mounting, and documented compliance with RTCA DO-160F Section 22 - enabling use where single-event survivability and multi-stroke endurance are mandatory.
Availability
MAPLAD36KP17CA is available at Aetrix Electronics and suitable for avionics power conditioning, automotive ECU protection, and industrial motor drive DC bus stabilization requiring stable component supply across extended production lifecycles.
Supply support for MAPLAD36KP17CA 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, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.
The MAPLAD36KP17CA belongs to Microsemi's high-power PLAD TVS family, engineered specifically for certified lightning and load-dump protection in safety-critical platforms where thermal stability and multi-stroke endurance are non-negotiable.
FAQ
What is the clamping voltage of MAPLAD36KP17CA at its rated peak pulse current?
The MAPLAD36KP17CA has a maximum clamping voltage (VC) of 28.8 V when subjected to its rated peak pulse current of 1250 A under 10/1000 μs waveform conditions. This value is measured at the device terminals and reflects worst-case performance across temperature and manufacturing lot variation, ensuring downstream 24 V-rated components remain within safe operating limits during surge events.
Is MAPLAD36KP17CA suitable for DO-160F Section 22 lightning testing?
Yes, MAPLAD36KP17CA is explicitly validated for RTCA DO-160F Section 22 multi-stroke lightning testing. Its 36 kW peak pulse power rating, sub-5 ns response time, and bidirectional symmetry enable it to meet Level 4 and Level 5 requirements for pin injection (Waveform 4) and secondary protection (IEC 61000-4-5 with 42 Ω source) in certified avionics designs.
Does MAPLAD36KP17CA require a heatsink for operation?
MAPLAD36KP17CA does not require an external heatsink for single-event surge suppression, but thermal management is essential for repetitive surges. Its 1.0 °C/W junction-to-case resistance mandates mounting on ≥1 in² of 2 oz copper with thermal vias or direct attachment to a heatsink when operating at >0.05% duty cycle - otherwise, junction temperature rise may exceed 150 °C.
What is the polarity configuration of MAPLAD36KP17CA?
MAPLAD36KP17CA is a bidirectional TVS diode, indicated by the "CA" suffix. It has symmetrical electrical characteristics between both terminals and contains no internal polarity marking. Either terminal may be connected to line or return, making it ideal for AC, differential, or floating bus protection without orientation constraints.
How does MAPLAD36KP17CA differ from unidirectional variants like MAPLAD36KP17A?
MAPLAD36KP17CA differs from MAPLAD36KP17A solely in polarity: the "CA" version is bidirectional with identical VWM (17 V), V(BR) (18.9–20.9 V), and VC (≤28.8 V), while the "A" version is unidirectional with cathode on the metal base. Both share identical package, thermal specs, and surge ratings - choice depends strictly on circuit topology (AC/floating vs. DC-referenced).
MAPLAD36KP17CA 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):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 28.8V
- Current - Peak Pulse (10/1000µs):
- 1250A (1.25kA)
- 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
MAPLAD36KP17CA FAQ
1.How can I place an order for MAPLAD36KP17CA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD36KP17CA 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 MAPLAD36KP17CA reliable?
The price and inventory of MAPLAD36KP17CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD36KP17CA is usually 5 days.
3.What payment methods are accepted for MAPLAD36KP17CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD36KP17CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD36KP17CA?
MAPLAD36KP17CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD36KP17CA 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 MAPLAD36KP17CA?
For technical support, including MAPLAD36KP17CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD36KP17CA requirements.
6.How does Aetrix verify that MAPLAD36KP17CA is sourced from the original manufacturer or authorized distributors?
All MAPLAD36KP17CA 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 MAPLAD36KP17CA meets industry standards.
7.What is the process for return or replacement of MAPLAD36KP17CA?
All MAPLAD36KP17CA units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD36KP17CA, 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 MAPLAD36KP17CA part is unused and in its original packaging.
Return procedure for MAPLAD36KP17CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD36KP17CA Tags
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