My Inquiry
My Account
Microchip Technology MAPLAD36KP17A
- Part No.:
- MAPLAD36KP17A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD36KP17A.pdf
- Description:
- TVS DIODE 17VWM 28.8VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:5,178
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAPLAD36KP17A from Microsemi is a unidirectional 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 ≤28.8 V (min V(BR) = 18.9 V), and supports reverse standoff voltage of 17 V - enabling robust lightning strike and load dump protection per RTCA DO-160 Section 22 and IEC 61000-4-5.
For engineers reviewing the MAPLAD36KP17A datasheet, MAPLAD36KP17A pinout, MAPLAD36KP17A application, or MAPLAD36KP17A equivalent, this device is selected for high-reliability DC bus protection where low clamping voltage, sub-100 ps response time, and multi-stroke surge endurance are critical - especially in avionics power distribution and 24 V vehicle electronics.
Technical Context
The MAPLAD36KP17A employs an avalanche diode structure optimized for fast transient response (<5 ns rise time) and low thermal resistance (RθJC = 1.0 °C/W). Its metal-base cathode construction enables direct heatsinking to PCB copper planes or external thermal pads, supporting sustained energy dissipation under repetitive surges at ≤0.05% duty cycle.
It meets AEC-Q101 stress testing requirements and is rated for junction temperatures from –55 °C to +150 °C. The device operates with 5 μA maximum standby current at 17 V standoff and exhibits a +14 mV/°C temperature coefficient of breakdown voltage - enabling predictable derating across extended temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 36,000 W @ 10/1000 μs - sustains single-stroke lightning-level transients without failure |
| Reverse Standoff Voltage (VWM) | 17 V - matches nominal 15–18 V DC systems (e.g., 24 V automotive with ripple margin) |
| Breakdown Voltage (V(BR)) | 18.9–20.9 V @ 5 mA - ensures reliable conduction onset above normal operating peaks |
| Max Clamping Voltage (VC) | 28.8 V @ 1250 A - limits downstream voltage stress to <30 V during worst-case surge |
| Junction-to-Case Thermal Resistance | 1.0 °C/W - enables efficient heat transfer to heatsink or large copper pour for thermal stability |
| Standby Current (ID) | ≤5 μA @ 17 V - negligible leakage in always-on power rails |
| Response Time | <5 ns - activates before sensitive ICs experience overvoltage damage |
Pinout & Package
MAPLAD36KP17A uses a surface-mount PLAD package (void-free UL94V-0 epoxy body) with two terminals: anode and cathode. The cathode is the exposed metal base on the underside of the package, requiring direct thermal contact with PCB copper for optimal heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive input terminal | Connected to protected line (e.g., 24 V rail); current flows into device during surge |
| Cathode (metal base) | Negative return / thermal path | Must be soldered to large copper area or heatsink; serves as primary thermal interface and circuit ground reference |
Key Features
| Feature | Design Value |
|---|---|
| RTCA DO-160F Waveform 4 compliance | Level 4 protection (6.4/69 μs) up to 400 V VWM - validated for aircraft pin-injection immunity |
| MIL-PRF-19500 upscreening option | Available M, MA, MX, MXL reliability levels with lot traceability and 3σ ID screening |
| IEC 61000-4-5 secondary lightning protection | Class 1–5 certified with 2 Ω, 12 Ω, and 42 Ω source impedances - covers diverse system impedance profiles |
| RoHS-compliant (e3) plating | Matte-tin terminations meet MIL-STD-750 Method 2026 - ensures reliable solderability and long-term intermetallic stability |
| Moisture sensitivity level | MSL Level 1 - no dry pack or bake required prior to reflow, simplifying SMT assembly |
Applications
| Aerospace Power Distribution | Automotive Load Dump Protection |
|---|---|
|
Use Scenario: 28 V DC main bus in commercial aircraft avionics bays subjected to multiple lightning-induced transients per flight cycle. IC Role / Device Role / Timing Role: Primary clamping TVS placed upstream of DC-DC converters and flight control modules. Use Value: Withstands ≥1000A surges at 10/1000 μs while limiting clamped voltage to 28.8 V - preserving 30 V-rated downstream components. |
Use Scenario: 24 V battery-fed engine control unit (ECU) exposed to ISO 7637-2 Pulse 5a load dump events (up to 120 V, 400 ms). IC Role / Device Role / Timing Role: Unidirectional TVS shunting surge energy directly to chassis ground via low-inductance layout. Use Value: Clamps within 5 ns to ≤28.8 V at 1250 A - prevents latch-up or gate oxide rupture in microcontrollers and CAN transceivers. |
| Industrial Motor Drive DC Bus | Railway Signaling Power Supply |
|
Use Scenario: 48 V DC link in variable-frequency drives where IGBT switching induces repetitive 1–5 kV spikes. IC Role / Device Role / Timing Role: High-power TVS mounted on copper-backed pad adjacent to bus capacitor bank. Use Value: 36 kW PPP rating and 1.0 °C/W RθJC allow safe dissipation of cumulative heating from frequent switching transients. |
Use Scenario: 110 V DC signaling power supply in European railway infrastructure, subject to EN 50121-3-2 surge coupling. IC Role / Device Role / Timing Role: Secondary protection stage after MOV-based front-end, providing precise clamping tolerance. Use Value: Tight V(BR) tolerance (±5.5%) and 14 mV/°C αV(BR) ensure stable clamping across –40 °C to +85 °C ambient operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ17A | Lower PPP (600 W), SMA package, RθJA = 110 °C/W - no metal base thermal path | Suitable only for low-duty-cycle, single-event protection in consumer-grade boards | Select SMBJ17A only when surge energy is <1% of MAPLAD36KP17A's capability and thermal budget permits ambient-only cooling |
| SMCJ17A | PPP = 1500 W, SMC package, RθJC ≈ 2.5 °C/W - limited to ~100 A IPP at 10/1000 μs | Used in industrial PLC I/O modules but not qualified for DO-160 or AEC-Q101 | Choose SMCJ17A for cost-sensitive non-aerospace applications where 1500 W PPP suffices and qualification is not mandated |
Compared with SMBJ17A and SMCJ17A, the MAPLAD36KP17A provides 24× and 24× higher peak power handling, integrated metal-base thermal management, and full DO-160F/IEC 61000-4-5 certification - making it the sole option for multi-stroke, high-reliability DC bus protection in safety-critical platforms.
Availability
MAPLAD36KP17A is available at Aetrix Electronics and suitable for aerospace power distribution, automotive load dump protection, and industrial motor drive DC bus applications requiring stable component supply, long-term lifecycle support, and traceable high-reliability sourcing.
Supply support for MAPLAD36KP17A 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 and mixed-signal semiconductors for aerospace, defense, and industrial markets, with emphasis on radiation-hardened, high-power, and precision timing solutions.
The MAPLAD36KP17A belongs to Microsemi's PLAD-series high-power TVS family, engineered specifically for multi-stroke lightning and load dump protection in mission-critical power systems where thermal performance and certification compliance are non-negotiable.
FAQ
What is the maximum peak pulse current (IPP) rating for MAPLAD36KP17A?
The MAPLAD36KP17A has a maximum peak pulse current (IPP) of 1250 A under the standard 10/1000 μs waveform. This value is confirmed in the Electrical Characteristics table of the RF01216 Rev B datasheet and reflects the device's ability to safely conduct high-current transients without degradation when mounted per recommended pad layout.
Is MAPLAD36KP17A RoHS compliant?
Yes, MAPLAD36KP17A is RoHS compliant and carries the "e3" designation in its nomenclature, indicating annealed matte-tin plating per J-STD-020B Level 1 moisture sensitivity - eliminating the need for dry packing or baking prior to reflow soldering.
Does MAPLAD36KP17A support bidirectional operation?
No, MAPLAD36KP17A is a unidirectional TVS. Bidirectional variants carry the "CA" suffix (e.g., MAPLAD36KP17CA). The cathode is the metal base on the underside, and polarity must be observed during PCB layout to ensure proper clamping direction.
What thermal management is required for MAPLAD36KP17A?
MAPLAD36KP17A requires direct thermal coupling of its metal base (cathode) to a large copper area or external heatsink. Its RθJC of 1.0 °C/W assumes optimal mounting per the specified pad layout; insufficient copper area will cause junction overheating and premature failure during repetitive surges.
Which industry standards does MAPLAD36KP17A meet?
MAPLAD36KP17A is tested and certified to RTCA DO-160F Section 22 (lightning indirect effects), IEC 61000-4-5 (surge immunity), IEC 61000-4-2 (ESD), and IEC 61000-4-4 (EFT), and qualified to AEC-Q101 for automotive use - with optional MIL-PRF-19500 upscreening available.
MAPLAD36KP17A 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):
- 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
MAPLAD36KP17A FAQ
1.How can I place an order for MAPLAD36KP17A through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD36KP17A 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 MAPLAD36KP17A reliable?
The price and inventory of MAPLAD36KP17A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD36KP17A is usually 5 days.
3.What payment methods are accepted for MAPLAD36KP17A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD36KP17A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD36KP17A?
MAPLAD36KP17A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD36KP17A 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 MAPLAD36KP17A?
For technical support, including MAPLAD36KP17A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD36KP17A requirements.
6.How does Aetrix verify that MAPLAD36KP17A is sourced from the original manufacturer or authorized distributors?
All MAPLAD36KP17A 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 MAPLAD36KP17A meets industry standards.
7.What is the process for return or replacement of MAPLAD36KP17A?
All MAPLAD36KP17A units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD36KP17A, 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 MAPLAD36KP17A part is unused and in its original packaging.
Return procedure for MAPLAD36KP17A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD36KP17A Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
