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Microchip Technology MAPLAD18KP170CAE3
- Part No.:
- MAPLAD18KP170CAE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD18KP170CAE3.pdf
- Description:
- TVS DIODE 170VWM 275VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:2,966
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Product details
Overview
MAPLAD18KP170CAE3 from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) rated for 18,000 W peak pulse power at 10/1000 μs, with 170 V reverse standoff voltage (VWM), 189–209 V breakdown voltage (V(BR)), and 275 V maximum clamping voltage (VC) at 10 A IPP. It delivers low thermal resistance (RθJC = 0.7 °C/W) and meets RTCA DO-160F Waveform 4 Level 4 and IEC 61000-4-5 Class 1–5 secondary lightning protection requirements in aerospace and automotive systems.
For engineers reviewing the MAPLAD18KP170CAE3 datasheet, MAPLAD18KP170CAE3 pinout, MAPLAD18KP170CAE3 application, or MAPLAD18KP170CAE3 equivalent, this page provides verified electrical parameters, package dimensions, DO-160F/IEC 61000-4-5 compliance mapping, thermal derating behavior, and validated alternative parts for high-reliability transient suppression in avionics power rails and vehicle ECU interfaces.
Technical Context
This TVS diode employs a silicon avalanche structure optimized for multi-stroke lightning transients per RTCA DO-160 Section 22 and repetitive surge events under ≤0.05% duty factor. Its bidirectional construction enables symmetrical clamping on both polarities without external polarity management.
Thermal performance is enabled by direct metal-base cathode attachment and void-free UL94V-0 epoxy packaging, achieving RθJC = 0.7 °C/W when mounted on FR4 with recommended pad layout. Standby current ID is ≤10 μA at VWM = 170 V, supporting low-leakage system monitoring circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 18,000 W @ 10/1000 μs - sustains aircraft lightning-induced surges without degradation |
| Reverse Standoff Voltage (VWM) | 170 V - sets maximum continuous operating voltage before clamping activation |
| Breakdown Voltage (V(BR)) | 189–209 V @ I(BR) - defines guaranteed avalanche onset range for design margining |
| Clamping Voltage (VC) | 275 V @ 10 A IPP - limits downstream voltage stress during worst-case surge |
| Junction-to-Case Thermal Resistance | 0.7 °C/W - enables efficient heat transfer to PCB copper pour or heatsink |
| Standby Current (ID) | ≤10 μA @ 170 V - avoids loading of high-impedance sensor or bias networks |
| Moisture Sensitivity Level | Level 1 per J-STD-020B - allows standard SMT reflow without dry-pack preconditioning |
Pinout & Package
The MAPLAD18KP170CAE3 uses a surface-mount PLAD package with two terminals: anode and cathode. The cathode is the metal base (bottom side) of the device; polarity marking is not visible on top surface. Package conforms to JEDEC MO-230 variant with 12.32 × 10.54 mm footprint and 5.08 mm height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive terminal for unidirectional mode; AC input for bidirectional mode | Connected to protected line; clamps positive transients to cathode (ground or rail) |
| Cathode | Negative terminal for unidirectional mode; AC return for bidirectional mode | Mounted to metal baseplate; must be thermally connected to PCB copper for RθJC = 0.7 °C/W |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional surge suppression | Enables single-device protection of AC-coupled or floating signal/power lines without polarity constraints |
| RTCA DO-160F Waveform 4 Level 4 compliance | Validated for 6.4/69 μs pin-injection transients up to 170 V VWM devices - critical for avionics data bus protection |
| IEC 61000-4-5 Class 1–5 support (42 Ω source) | Meets secondary lightning immunity across all severity classes using same device - simplifies BOM consolidation |
| MIL-PRF-19500 upscreening option | Supports high-reliability screening (M, MA, MX, MXL levels) for space-grade and military programs |
| RoHS-compliant matte-tin plating (e3) | Ensures solderability per MIL-STD-750 Method 2026 and eliminates lead-based process concerns |
Applications
| Aerospace Power Distribution | Automotive Load Dump Protection |
|---|---|
Use Scenario: 28 V DC distribution bus in commercial aircraft, exposed to DO-160 Section 22 lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional TVS clamp limiting transient overvoltage on main power feed to flight control modules. Use Value: Withstands ≥1000 strokes at 18 kW without parameter shift, meeting FAA airworthiness requirements. | Use Scenario: 12 V/24 V battery-fed ECU power input subjected to ISO 7637-2 Load Dump pulses (up to 120 V). IC Role / Device Role / Timing Role: Primary overvoltage protector absorbing >95% of 100 ms, 120 V energy spike before regulator input. Use Value: Clamps to 275 V within <5 ns, preventing damage to downstream DC/DC converters and microcontrollers. |
| Industrial Motor Drive DC Bus | Railway Signaling Interface |
Use Scenario: 300–400 V DC link in variable-frequency drives exposed to switching transients and induced RFI. IC Role / Device Role / Timing Role: High-energy snubber suppressing commutation spikes and regenerative braking surges. Use Value: 18,000 W PPP rating handles cumulative heating from repeated 10/1000 μs events at ≤0.05% duty cycle. | Use Scenario: 72 V signaling interface between track-side controllers and onboard train communication units. IC Role / Device Role / Timing Role: Bidirectional protector against EFT bursts (IEC 61000-4-4) and lightning coupling (IEC 61000-4-5). Use Value: 10 μA standby leakage preserves integrity of low-power RS-485 bias networks while clamping to 275 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170CA | 600 W PPP rating, SMB package, RθJC ≈ 15 °C/W | Not suitable for DO-160F Level 4 or multi-stroke lightning; limited to consumer/industrial grade | Select only for cost-sensitive, non-aerospace designs with lower surge energy requirements. |
| SMCJ170CA | 1500 W PPP rating, SMC package, RθJC ≈ 3.5 °C/W | Cannot meet 18 kW single-pulse or RTCA DO-160F Waveform 4 Level 4 without parallel staging | Use where board space permits larger footprint but full MAPLAD-level reliability is not required. |
Compared with SMBJ170CA and SMCJ170CA, MAPLAD18KP170CAE3 delivers 30× and 12× higher peak pulse power respectively, enabling single-device compliance with aviation lightning standards and eliminating thermal stacking or paralleling complexity in high-reliability power rails.
Availability
MAPLAD18KP170CAE3 is available at Aetrix Electronics and suitable for aerospace power distribution, automotive load dump protection, industrial motor drive DC bus stabilization, and railway signaling interface applications requiring stable component supply across extended product lifecycles.
Supply support for MAPLAD18KP170CAE3 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, RF, timing, and radiation-hardened solutions for aerospace, defense, and industrial markets.
The MAPLAD18KP170CAE3 belongs to Microsemi's high-power PLAD-series TVS family, engineered specifically for multi-stroke lightning protection and DO-160F compliance in safety-critical avionics and transportation systems.
FAQ
What is the clamping voltage of MAPLAD18KP170CAE3 at its rated peak pulse current?
The MAPLAD18KP170CAE3 has a maximum clamping voltage (VC) of 275 V at 10 A peak pulse current (IPP) under 10/1000 μs waveform conditions. This value ensures downstream circuitry remains below safe voltage thresholds during standardized lightning and load-dump transients, directly supporting DO-160F and ISO 7637-2 compliance verification for the MAPLAD18KP170CAE3.
Does MAPLAD18KP170CAE3 require special handling for moisture sensitivity?
No - MAPLAD18KP170CAE3 is rated Moisture Sensitivity Level 1 per IPC/JEDEC J-STD-020B, meaning it can be processed using standard SMT reflow profiles without dry-pack baking or floor-life restrictions. This eliminates moisture-related popcorning risk and simplifies manufacturing for the MAPLAD18KP170CAE3 in high-volume aerospace and automotive production.
How does the thermal resistance of MAPLAD18KP170CAE3 impact PCB layout?
The MAPLAD18KP170CAE3 achieves RθJC = 0.7 °C/W only when its metal cathode base is soldered to a minimum 10 cm² copper pour on the PCB layer beneath. Layouts must follow the recommended pad dimensions (12.32 × 10.54 mm) and avoid thermal isolation - inadequate copper area raises junction temperature and degrades the MAPLAD18KP170CAE3's 18 kW surge capability.
Is MAPLAD18KP170CAE3 certified for RTCA DO-160F Waveform 4 Level 4?
Yes - MAPLAD18KP170CAE3 is explicitly listed in Microsemi's RF01215 Rev B documentation as qualified for RTCA DO-160F Waveform 4 (6.4/69 μs) Level 4 testing at 25°C, covering the full 7.0–200 V VWM range including the MAPLAD18KP170CAE3. This certification applies to pin-injection transients on avionics data and power lines.
What is the significance of the 'CA' suffix in MAPLAD18KP170CAE3?
The 'CA' suffix in MAPLAD18KP170CAE3 denotes bidirectional construction, meaning the device provides symmetrical clamping for both positive and negative transients without polarity dependency. This distinguishes it from unidirectional variants (e.g., MAPLAD18KP170AE3) and makes the MAPLAD18KP170CAE3 ideal for AC-coupled interfaces, floating buses, and systems where voltage polarity reversal may occur.
MAPLAD18KP170CAE3 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):
- 170V
- Voltage - Breakdown (Min):
- 189V
- Voltage - Clamping (Max) @ Ipp:
- 275V
- Current - Peak Pulse (10/1000µs):
- 66A
- Power - Peak Pulse:
- 18000W (18kW)
- 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
MAPLAD18KP170CAE3 FAQ
1.How can I place an order for MAPLAD18KP170CAE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD18KP170CAE3 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 MAPLAD18KP170CAE3 reliable?
The price and inventory of MAPLAD18KP170CAE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD18KP170CAE3 is usually 5 days.
3.What payment methods are accepted for MAPLAD18KP170CAE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD18KP170CAE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD18KP170CAE3?
MAPLAD18KP170CAE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD18KP170CAE3 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 MAPLAD18KP170CAE3?
For technical support, including MAPLAD18KP170CAE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD18KP170CAE3 requirements.
6.How does Aetrix verify that MAPLAD18KP170CAE3 is sourced from the original manufacturer or authorized distributors?
All MAPLAD18KP170CAE3 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 MAPLAD18KP170CAE3 meets industry standards.
7.What is the process for return or replacement of MAPLAD18KP170CAE3?
All MAPLAD18KP170CAE3 units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD18KP170CAE3, 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 MAPLAD18KP170CAE3 part is unused and in its original packaging.
Return procedure for MAPLAD18KP170CAE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD18KP170CAE3 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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ESD5Z3.3T1G
onsemi
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Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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Diodes Incorporated
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