My Inquiry
My Account
Diodes Incorporated P6SMAJ18ADF-13
- Part No.:
- P6SMAJ18ADF-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- 2-SMD, Flat Leads
- Datasheet:
-
P6SMAJ18ADF-13.pdf
- Description:
- TVS DIODE 18VWM 29.2VC D-FLAT
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P6SMAJ18ADF-13 from Diodes Incorporated is a 600W surface-mount transient voltage suppressor (TVS) diode designed for unidirectional overvoltage protection in DC power lines and signal interfaces. It features a reverse standoff voltage of 18 V, breakdown voltage range of 20.0–23.3 V at 1.0 mA test current, clamping voltage of 29.2 V at 20.5 A peak pulse current, and D-FLAT package with cathode band polarity marking.
For engineers reviewing the P6SMAJ18ADF-13 datasheet, P6SMAJ18ADF-13 pinout, P6SMAJ18ADF-13 application, or P6SMAJ18ADF-13 equivalent, key selection criteria include clamping voltage margin relative to protected IC VDD, peak pulse current handling under IEC 61000-4-5 surge conditions, thermal resistance to PCB copper pad layout, and RoHS-compliant green packaging for industrial and automotive front-end circuits.
Technical Context
This unidirectional TVS operates as a clamping device that remains high-impedance below 18 V reverse standoff voltage and rapidly transitions to low-impedance conduction above its 20.0 V minimum breakdown threshold. Its glass-passivated junction ensures stable leakage (<1 µA at VRWM) and repeatable clamping performance across temperature.
The 600 W peak pulse power rating is specified per 10 × 1000 µs waveform, with fast response time enabling suppression of ESD (IEC 61000-4-2), EFT (IEC 61000-4-4), and lightning-induced surges (IEC 61000-4-5). Thermal resistance is 57 °C/W junction-to-terminal when mounted on a 0.4" × 0.5" 2 oz copper pad.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600 W - Sustains single 10 × 1000 µs surges without failure under defined mounting conditions |
| Reverse Standoff Voltage | 18 V - Maximum continuous DC operating voltage before significant leakage begins |
| Breakdown Voltage | 20.0–23.3 V @ 1.0 mA - Confirmed avalanche initiation range for reliable turn-on margin |
| Clamping Voltage | 29.2 V @ 20.5 A - Maximum voltage seen by protected circuit during rated surge event |
| Leakage Current | ≤1.0 µA @ 18 V - Ensures minimal power loss and signal integrity in standby operation |
| Package | D-FLAT - Low-profile surface-mount outline (4.65 mm × 2.80 mm × 1.10 mm) optimizing board space |
| RoHS / Green | Lead-free, halogen-free, antimony-free - Compliant with EU directives and environmental manufacturing requirements |
Pinout & Package
The P6SMAJ18ADF-13 uses the D-FLAT surface-mount package with two terminals: anode and cathode. Polarity is marked by a cathode band on the top surface. The package measures 4.65 mm × 2.80 mm × 1.10 mm and is optimized for automated placement and reflow soldering on FR-4 PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Transient current sink | Connected to protected line; conducts surge current to ground when clamped |
| 2 (Anode) | Reference node | Typically tied to system ground or lowest potential reference plane |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die construction | Ensures long-term stability of breakdown voltage and leakage performance across thermal cycling |
| 64 °C/W junction-to-ambient thermal resistance | Enables effective heat dissipation on standard 1" × 1" 2 oz FR-4 pads for intermittent surge duty |
| 0.035 g unit weight | Minimizes mechanical stress on PCB interconnects in vibration-prone environments |
| Matte tin annealed terminals | Guarantees reliable solderability per MIL-STD-202, Method 208, with no lead-free compatibility issues |
Applications
| Industrial PLC I/O Protection | Automotive Body Control Module |
|---|---|
Use Scenario: Protecting 24 V DC sensor inputs in programmable logic controllers against induced surges from relay switching and motor noise. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input terminal and ground to clamp transients before they reach signal conditioning amplifiers or microcontroller GPIOs. Use Value: Clamps 20.5 A surges to ≤29.2 V, maintaining safe margin below 33 V absolute maximum rating of typical industrial op-amps and ADC drivers. | Use Scenario: Safeguarding LIN bus transceiver power rails and data lines in door module ECUs exposed to load dump and jump-start events. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12 V supply rail upstream of LDO regulators and CAN/LIN interface ICs. Use Value: Withstands 600 W peak pulses and maintains <1 µA leakage at 13.5 V nominal battery voltage, minimizing quiescent current drain. |
| Telecom Power Supply Input | Medical Diagnostic Equipment Interface |
Use Scenario: Front-end protection of AC/DC adapter outputs feeding isolated DC-DC converters in base station power systems. IC Role / Device Role / Timing Role: Secondary surge suppression stage after bulk MOVs, absorbing residual energy from IEC 61000-4-5 combination wave tests. Use Value: 29.2 V clamping voltage ensures downstream 24 V-rated DC-DC controllers remain within safe operating area during 2 kV/1 kA surge events. | Use Scenario: Shielding analog front-end connectors (e.g., ECG electrode inputs) from electrostatic discharge during clinical handling. IC Role / Device Role / Timing Role: Low-capacitance TVS placed directly at connector pins to shunt ESD pulses before reaching precision instrumentation amplifiers. Use Value: Sub-1 µA leakage preserves DC accuracy of µV-level biopotential signals; D-FLAT footprint allows placement within 2 mm of connector entry point. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ18A-13-F | Same electrical specs but SMA package (4.5 mm × 2.7 mm × 2.2 mm); higher RθJA (125 °C/W) | Less effective thermal dissipation on compact boards; requires larger copper area for equivalent surge endurance | Select if legacy SMA footprint compatibility is required and board layout allows extra height clearance |
| 1.5SMC18A | Higher power rating (1500 W), DO-214AB package (7.1 mm × 6.2 mm); 29.2 V clamping identical | Occupies >3× PCB area; suited for primary-level surge protection where space permits | Choose for first-stage protection in harsh environments where 600 W is insufficient |
Compared with SMAJ18A-13-F and 1.5SMC18A, the P6SMAJ18ADF-13 delivers identical clamping performance in a lower-profile, thermally optimized D-FLAT package-enabling tighter board stacking and better surge reliability per unit area in space-constrained industrial and automotive modules.
Availability
P6SMAJ18ADF-13 is available at Aetrix Electronics and suitable for industrial PLC I/O protection, automotive body control modules, telecom power supply inputs, and medical diagnostic equipment interfaces requiring stable component supply and consistent surge immunity performance.
Supply support for P6SMAJ18ADF-13 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability protection, power management, and signal integrity solutions for industrial, automotive, and computing markets.
The P6SMAJ series belongs to Diodes' transient voltage suppressor product line, engineered specifically for robust, low-profile surge protection in space-constrained DC power and interface circuits where thermal efficiency and RoHS/green compliance are mandatory.
FAQ
What is the maximum clamping voltage of P6SMAJ18ADF-13 under rated surge conditions?
The maximum clamping voltage is 29.2 V measured at 20.5 A peak pulse current using the standardized 10 × 1000 µs waveform. This value is guaranteed across the full operating temperature range of −55 °C to +150 °C and defines the upper voltage limit imposed on protected circuitry during surge events.
Can P6SMAJ18ADF-13 be used in bidirectional signal line protection?
No. P6SMAJ18ADF-13 is a unidirectional TVS diode with cathode-anode polarity and is not rated for reverse surge conduction. For bidirectional protection (e.g., RS-485, USB, or AC-coupled lines), a symmetric device such as P6SMBJ18CA-13 or SMAJ18CA-13 must be selected instead.
What PCB pad layout recommendations apply to the D-FLAT package?
Diodes Incorporated specifies a recommended pad layout with 0.2" × 0.25" (5.08 mm × 6.35 mm) copper pads for optimal thermal performance. The pad design must maintain ≥0.1 mm solder mask dam between pads and align with the D-FLAT outline dimensions: length 4.65 mm, width 2.80 mm, thickness ≤1.10 mm.
How does the 600 W rating relate to real-world surge testing standards?
The 600 W rating corresponds to a 10 × 1000 µs double-exponential waveform used in IEC 61000-4-5 Level 3 (1 kV/500 A) and Level 4 (2 kV/1 kA) testing. When mounted per datasheet thermal guidelines, the device reliably clamps multiple such events without degradation, provided duty cycle remains ≤4 pulses per minute.
P6SMAJ18ADF-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- 2-SMD, Flat Leads
- Series:
- SMAJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 18V
- Voltage - Breakdown (Min):
- 20V
- Voltage - Clamping (Max) @ Ipp:
- 29.2V
- Current - Peak Pulse (10/1000µs):
- 20.5A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- D-Flat
P6SMAJ18ADF-13 FAQ
1.How can I place an order for P6SMAJ18ADF-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMAJ18ADF-13 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 P6SMAJ18ADF-13 reliable?
The price and inventory of P6SMAJ18ADF-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMAJ18ADF-13 is usually 5 days.
3.What payment methods are accepted for P6SMAJ18ADF-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMAJ18ADF-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMAJ18ADF-13?
P6SMAJ18ADF-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMAJ18ADF-13 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 P6SMAJ18ADF-13?
For technical support, including P6SMAJ18ADF-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMAJ18ADF-13 requirements.
6.How does Aetrix verify that P6SMAJ18ADF-13 is sourced from the original manufacturer or authorized distributors?
All P6SMAJ18ADF-13 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 P6SMAJ18ADF-13 meets industry standards.
7.What is the process for return or replacement of P6SMAJ18ADF-13?
All P6SMAJ18ADF-13 units undergo pre-shipment inspection (PSI). If there is an issue with P6SMAJ18ADF-13, 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 P6SMAJ18ADF-13 part is unused and in its original packaging.
Return procedure for P6SMAJ18ADF-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMAJ18ADF-13 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
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…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
