My Inquiry
My Account
Microchip Technology MAPLAD18KP7.0CA
- Part No.:
- MAPLAD18KP7.0CA
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD18KP7.0CA.pdf
- Description:
- TVS DIODE 7VWM 12VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:7,272
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAPLAD18KP7.0CA from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace, automotive, and industrial systems. It delivers 18,000 W peak pulse power at 10/1000 μs, clamps at ≤150 V under 1500 A peak current, and features a 7.0 V reverse standoff voltage (VWM) with ±5% breakdown tolerance (7.78–8.60 V). It meets RTCA DO-160 Section 22 multi-stroke lightning and IEC 61000-4-5 Class 1–5 secondary lightning standards.
For engineers reviewing the MAPLAD18KP7.0CA datasheet, MAPLAD18KP7.0CA pinout, MAPLAD18KP7.0CA application, or MAPLAD18KP7.0CA equivalent, this device is selected for high-reliability DC bus protection where low clamping voltage, sub-100 ps response time, and MIL-PRF-19500 upscreening capability are critical - especially in avionics power inputs, battery management systems, and 24 V/28 V vehicle electronics.
Technical Context
The MAPLAD18KP7.0CA employs an avalanche diode structure optimized for fast transient response (<5 ns clamping delay) and low thermal resistance (RθJC = 0.7 °C/W), enabling repeated high-energy surges without thermal runaway. Its bidirectional construction supports symmetrical AC/DC line protection, and its metal-base package provides direct thermal path to heatsink or PCB copper.
It is characterized per AEC-Q101 stress testing and rated for junction temperatures from –55°C to +150°C. Standby leakage is tightly controlled (ID ≤ 3000 μA @ 7.0 V), and temperature coefficient of breakdown voltage is +5.0 mV/°C - ensuring stable clamping across operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V maximum working standoff voltage - sets upper limit for continuous DC or peak AC voltage before conduction begins |
| V(BR) | 7.78–8.60 V at I(BR) - minimum breakdown threshold ensures reliable turn-on during transients |
| VC @ IPP | 150 V max at 1500 A (10/1000 μs) - defines worst-case voltage seen by protected circuit during surge |
| PPP | 18,000 W peak pulse power - enables suppression of lightning-induced surges per DO-160F Waveform 4 & 5A |
| RθJC | 0.7 °C/W junction-to-case thermal resistance - allows efficient heat transfer to heatsink or large copper pour |
| ID @ VWM | ≤3000 μA standby leakage - minimizes quiescent power loss in always-on systems like avionics sensors |
| αV(BR) | +5.0 mV/°C - predictable positive drift ensures clamping voltage rises safely with temperature |
Pinout & Package
MAPLAD18KP7.0CA uses a surface-mount PLAD package with metal base (cathode side) and two solderable terminals on top. The case is void-free thermosetting epoxy (UL94V-0), with matte-tin plating compliant with MIL-STD-750 Method 2026. Dimensions: 12.32 × 10.54 × 5.08 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Top Terminal) | Positive surge path input | Connects to protected line; conducts during positive transients in bidirectional mode |
| Cathode (Metal Base) | Reference/ground return path | Serves as thermal and electrical reference plane; must be soldered to large copper area or heatsink |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional surge suppression | Protects both polarities of DC lines or AC signals without external polarity coordination |
| DO-160F Waveform 4 & 5A compliance | Validated for Level 4 (6.4/69 μs) and Level 4 (40/120 μs) pin injection in aircraft systems |
| MIL-PRF-19500 upscreening option | Enables high-reliability screening (M, MA, MX, MXL levels) for mission-critical aerospace deployments |
| Low-profile SMT package | Enables dense PCB layouts while maintaining 18 kW surge capability - no through-hole mounting required |
| IEC 61000-4-2/4-4/4-5 certified | Meets ESD (±15 kV air), EFT (±4 kV), and lightning surge (42 Ω, 12 Ω, 2 Ω source) immunity requirements |
Applications
| Aerospace Power Input Protection | Automotive Load Dump Suppression |
|---|---|
Use Scenario: 28 V DC power feed to flight control computers exposed to lightning-induced transients per RTCA DO-160 Section 22. IC Role / Device Role / Timing Role: Primary TVS clamp placed directly at connector entry point to shunt >10 kA surges before reaching downstream regulators. Use Value: Clamps to ≤150 V within <5 ns, limiting stress on 36 V-rated DC/DC converters and preserving system uptime during multi-stroke events. | Use Scenario: 12 V/24 V battery-fed infotainment module subjected to ISO 7637-2 Load Dump pulses (up to 120 V, 400 ms). IC Role / Device Role / Timing Role: Bidirectional TVS placed across main power rail to absorb energy without polarity-sensitive orientation. Use Value: Handles 18 kW peak power without degradation, eliminating need for series resistors or additional clamping stages in compact modules. |
| Industrial Motor Drive DC Bus | Railway Signaling Interface |
Use Scenario: 400 V DC bus in variable-frequency drives exposed to switching-induced transients and regenerative energy spikes. IC Role / Device Role / Timing Role: Secondary surge protector parallel to bulk capacitor, activated only during overvoltage excursions exceeding VWM. Use Value: Low RθJC (0.7 °C/W) prevents thermal accumulation during repetitive 10/1000 μs surges, supporting >0.05% duty cycle operation. | Use Scenario: 72 V signaling interface in train control systems requiring IEC 61000-4-5 Class 4 immunity with 42 Ω source impedance. IC Role / Device Role / Timing Role: Bidirectional TVS deployed on isolated RS-485 lines to protect transceivers from induced surges on long cable runs. Use Value: Validated for Class 4 at 72 V standoff (via MPLAD18KP70CA variant), enabling drop-in use in legacy signaling designs with minimal layout change. |
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 SMAJ7.0CA | 600 W PPP rating (vs. 18,000 W); 10× lower surge capacity; same VWM and bidirectional polarity | Rated for consumer/industrial IEC 61000-4-5 Class 2 only - insufficient for DO-160F Level 4 or multi-stroke lightning | Select when cost and board space constrain design, and surge threat level is limited to ESD/EFT or low-energy switching noise. |
| Vishay SM8S7.0A | Unidirectional only; 6600 W PPP; higher clamping voltage (11.5 V @ 100 A) - not suitable for symmetric AC/DC protection | Lacks bidirectional capability and fails DO-160F Waveform 5A validation; requires polarity-aware placement | Choose only for unidirectional 7 V DC rails where footprint and RoHS compliance are priorities, and lightning-level threats are excluded. |
Compared with SMAJ7.0CA and SM8S7.0A, MAPLAD18KP7.0CA uniquely delivers aircraft-grade 18 kW surge handling in a bidirectional SMT package with full DO-160F and MIL-PRF-19500 support - making it irreplaceable for safety-critical avionics and high-reliability transportation systems.
Availability
MAPLAD18KP7.0CA is available at Aetrix Electronics and suitable for aerospace power conditioning, automotive battery management, and industrial motor drive protection requiring stable component supply across extended product lifecycles.
Supply support for MAPLAD18KP7.0CA 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 MAPLAD18KP7.0CA belongs to Microsemi's high-power PLAD TVS family, engineered specifically for multi-stroke lightning protection and load dump suppression in safety-critical platforms where failure is not an option.
FAQ
What is the clamping voltage of MAPLAD18KP7.0CA at its rated peak pulse current?
The MAPLAD18KP7.0CA has a maximum clamping voltage (VC) of 150 V when subjected to its rated peak pulse current of 1500 A under 10/1000 μs waveform conditions. This value is measured at the device terminals and represents the worst-case voltage imposed on the protected circuit during surge events - critical for ensuring downstream components remain within their absolute maximum ratings.
Is MAPLAD18KP7.0CA suitable for DO-160F Section 22 lightning testing?
Yes, MAPLAD18KP7.0CA is explicitly validated for RTCA DO-160F Section 22 multi-stroke lightning testing, including Waveform 4 (6.4/69 μs) Level 4 and Waveform 5A (40/120 μs) Level 4. Its 18,000 W peak pulse power rating and low thermal resistance enable reliable performance across repeated strokes without parameter shift or catastrophic failure.
Does MAPLAD18KP7.0CA require a heatsink for standard operation?
MAPLAD18KP7.0CA does not require an external heatsink for single-event surge suppression, but its metal base must be soldered to ≥250 mm² of 2 oz copper for optimal thermal dissipation. For repetitive surges (>0.05% duty factor), a heatsink or forced-air cooling is recommended to maintain junction temperature below 150°C - leveraging its 0.7 °C/W RθJC for predictable thermal design.
How does the CA suffix in MAPLAD18KP7.0CA affect its functionality?
The "CA" suffix in MAPLAD18KP7.0CA denotes bidirectional construction, meaning the device provides symmetrical clamping for both positive and negative transients. Unlike unidirectional variants (e.g., MAPLAD18KP7.0A), it eliminates polarity dependency during layout - essential for AC-coupled interfaces, differential buses, or systems where voltage reversal risk exists.
What is the moisture sensitivity level (MSL) of MAPLAD18KP7.0CA?
MAPLAD18KP7.0CA is rated at IPC/JEDEC J-STD-020B Moisture Sensitivity Level 1, meaning it has unlimited floor life and requires no dry pack or baking prior to reflow soldering. This simplifies manufacturing logistics and reduces risk of popcorning during assembly - a key advantage for high-reliability production environments.
MAPLAD18KP7.0CA 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):
- 7V
- Voltage - Breakdown (Min):
- 7.78V
- Voltage - Clamping (Max) @ Ipp:
- 12V
- Current - Peak Pulse (10/1000µs):
- 1500A (1.5kA)
- 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
MAPLAD18KP7.0CA FAQ
1.How can I place an order for MAPLAD18KP7.0CA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD18KP7.0CA 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 MAPLAD18KP7.0CA reliable?
The price and inventory of MAPLAD18KP7.0CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD18KP7.0CA is usually 5 days.
3.What payment methods are accepted for MAPLAD18KP7.0CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD18KP7.0CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD18KP7.0CA?
MAPLAD18KP7.0CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD18KP7.0CA 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 MAPLAD18KP7.0CA?
For technical support, including MAPLAD18KP7.0CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD18KP7.0CA requirements.
6.How does Aetrix verify that MAPLAD18KP7.0CA is sourced from the original manufacturer or authorized distributors?
All MAPLAD18KP7.0CA 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 MAPLAD18KP7.0CA meets industry standards.
7.What is the process for return or replacement of MAPLAD18KP7.0CA?
All MAPLAD18KP7.0CA units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD18KP7.0CA, 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 MAPLAD18KP7.0CA part is unused and in its original packaging.
Return procedure for MAPLAD18KP7.0CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD18KP7.0CA 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…
