My Inquiry
My Account
Diodes Incorporated P4SMAJ45ADF-13
- Part No.:
- P4SMAJ45ADF-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- 2-SMD, Flat Leads
- Datasheet:
-
P4SMAJ45ADF-13.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR D-F
- Quantity:
- Payment:
- Shipping:
Inventory:4,877
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P4SMAJ45ADF-13 from Diodes Incorporated is a 400W 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 45 V, clamping voltage of 72.7 V at 5.5 A peak pulse current, and IEC 61000-4-2 ESD robustness (±30 kV air/contact). Used in industrial power supplies and automotive body electronics to safeguard microcontrollers and communication ICs.
For engineers reviewing the P4SMAJ45ADF-13 datasheet, P4SMAJ45ADF-13 pinout, P4SMAJ45ADF-13 application, or P4SMAJ45ADF-13 equivalent, key selection criteria include clamping voltage margin relative to protected IC's absolute maximum rating, thermal resistance under PCB layout constraints, peak pulse current capability for surge immunity compliance, and D-FLAT package compatibility with high-density routing.
Technical Context
This unidirectional TVS diode operates as a fast-acting shunt clamp during transient events, leveraging avalanche breakdown to divert surge current away from sensitive downstream circuitry. Its glass-passivated die ensures stable breakdown characteristics and low leakage (<1 µA at 45 V), while the low-profile D-FLAT package enables compact placement near connectors or IC power pins.
The device complies with IEC 61000-4-2 Level 4 ESD immunity and withstands 8.3 ms half-sine surges up to 40 A. Thermal performance is defined by junction-to-terminal resistance of 37 °C/W (on 1"×1" FR-4) and junction-to-ambient resistance of 114 °C/W, requiring careful copper pad design for sustained power dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400 W - Sustains single 10×1000 µs transients without failure |
| Reverse Standoff Voltage | 45 V - Maximum continuous DC operating voltage before clamping initiates |
| Clamping Voltage @ IPP | 72.7 V @ 5.5 A - Voltage seen by protected circuit during worst-case 10×1000 µs surge |
| Breakdown Voltage Range | 50.0–55.3 V @ 1 mA - Ensures reliable avalanche triggering above VRWM with margin |
| ESD Rating | ±30 kV air / ±30 kV contact - Meets IEC 61000-4-2 Level 4 for system-level ESD immunity |
| Junction-to-Ambient RθJA | 114 °C/W - Requires ≥0.06"×0.09" copper pad on FR-4 for thermal management |
| Capacitance @ 0 V | 15 pF - Low enough for USB 2.0 and RS-485 data line protection without signal distortion |
Pinout & Package
Package: D-FLAT (low-profile surface-mount, 2-terminal, cathode-banded). Dimensions: 4.65 mm × 2.80 mm × 1.10 mm (L × W × H), with 0.2 mm minimum cathode band width.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Anode of internal avalanche diode | Connected to protected line; conducts surge current to ground when voltage exceeds VBR |
| 2 (Anode) | Cathode of internal avalanche diode | Connected to system ground; completes shunt path during transient events |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die construction | Ensures stable breakdown voltage and long-term reliability under repeated surge stress |
| Low-profile D-FLAT package | Reduces board space by >40% vs. SMA packages while maintaining 400 W rating |
| Lead-free, halogen-free, RoHS 3 compliant | Meets IPC-J-STD-020 moisture sensitivity level 1 and global environmental regulations |
| IEC 61000-4-2 certified ESD protection | Eliminates need for external ESD diodes in USB, CAN, and sensor interface designs |
Applications
| Industrial Power Input Protection | Automotive Body Control Module |
|---|---|
Use Scenario: 24 V DC input rail in programmable logic controllers exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between input connector and DC-DC converter input. Use Value: Clamps 120 V/500 ms load dump transients to ≤72.7 V, preventing damage to upstream rectifier and downstream regulator. | Use Scenario: LIN bus transceiver power supply line in door module subjected to battery disconnect spikes. IC Role / Device Role / Timing Role: Primary overvoltage clamp on VCC rail feeding LIN PHY IC. Use Value: Limits voltage excursion to <75 V during 100 V/50 ms transients, preserving transceiver functionality per ISO 17987-4. |
| USB 2.0 Data Line Protection | RS-485 Transceiver Interface |
Use Scenario: ESD protection on D+ and D− lines of embedded USB host port in medical diagnostic equipment. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional TVS used in dual-diode configuration (anode-to-anode). Use Value: 15 pF capacitance avoids signal integrity degradation at 480 Mbps; ±30 kV ESD rating exceeds IEC 61000-4-2 requirements. | Use Scenario: Overvoltage suppression on A/B differential pair of industrial RS-485 node connected to long cable runs. IC Role / Device Role / Timing Role: Common-mode TVS across A–GND and B–GND, with shared ground reference. Use Value: 72.7 V clamping prevents latch-up in MAX13487E transceivers rated for ±15 kV ESD and 60 V abs max. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ45A | Same 45 V VRWM and 72.7 V VC, but SMB package (larger footprint, higher RθJA = 140 °C/W) | Less suitable for ultra-dense layouts; requires larger copper area for thermal relief | Select when existing PCB has SMB pads or higher surge repetition rate demands better thermal mass |
| 1.5SMC47A | Higher 47 V VRWM, 77 V VC, 1500 W rating, DO-214AB package | Overqualified for 45 V systems; introduces unnecessary voltage margin and board space penalty | Choose only if legacy design uses DO-214AB footprint and surge energy exceeds 400 W capability |
Compared with SMBJ45A and 1.5SMC47A, P4SMAJ45ADF-13 delivers optimal balance of 400 W surge handling, minimal 4.65 mm × 2.80 mm footprint, and 114 °C/W thermal resistance-making it ideal for space-constrained 24–48 V industrial and automotive modules where layout density and thermal efficiency are critical.
Availability
P4SMAJ45ADF-13 is available at Aetrix Electronics and suitable for industrial power input protection, automotive body control modules, USB 2.0 data line protection, and RS-485 transceiver interface applications requiring stable component supply and full RoHS 3 compliance.
Supply support for P4SMAJ45ADF-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The P4SMAJ series belongs to Diodes' transient voltage suppressor product line, engineered specifically for high-reliability, low-footprint surge protection in harsh industrial and automotive environments where consistent clamping performance and regulatory compliance are mandatory.
FAQ
What is the maximum allowable PCB temperature rise when P4SMAJ45ADF-13 handles its rated 400 W peak pulse?
The device does not operate continuously at 400 W; it is rated for non-repetitive 10×1000 µs pulses at ≤4 pulses per minute. Under those conditions, junction temperature rise is calculated using RθJT = 37 °C/W and peak power duration. With proper 0.06"×0.09" copper pad, transient junction temperature remains below 150 °C even at ambient +75 °C.
Can P4SMAJ45ADF-13 be used for bidirectional transient suppression?
No-it is a unidirectional TVS diode with cathode-anode polarity. For bidirectional protection, two devices must be connected anode-to-anode or a dedicated bidirectional part like P4SMAJ45CA must be selected. Using a single unidirectional device on AC-coupled or floating lines risks reverse conduction and failure.
How does the D-FLAT package affect solder reflow profile requirements?
The D-FLAT package uses matte tin annealed terminals compatible with standard lead-free reflow profiles (peak 260 °C, 60 sec max above 217 °C). Its low mass and flat geometry reduce tombstoning risk, but require precise stencil aperture (0.15 mm thickness, 2.3 mm × 0.8 mm opening) and alignment to ensure uniform wetting on both terminals.
Is P4SMAJ45ADF-13 qualified for automotive AEC-Q200 stress testing?
No-this part is specified as "Standard" qualification per Diodes' ordering information and is not AEC-Q200 qualified. For automotive-grade applications requiring qualification, consider Diodes' AEC-Q200-compliant APxxxx series or contact Aetrix for validated alternatives with full PPAP documentation.
P4SMAJ45ADF-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- 2-SMD, Flat Leads
- Series:
- P4SMAJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 45V
- Voltage - Breakdown (Min):
- 50V
- Voltage - Clamping (Max) @ Ipp:
- 72.7V
- Current - Peak Pulse (10/1000µs):
- 5.5A
- Power - Peak Pulse:
- 400W
- 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
P4SMAJ45ADF-13 FAQ
1.How can I place an order for P4SMAJ45ADF-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMAJ45ADF-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 P4SMAJ45ADF-13 reliable?
The price and inventory of P4SMAJ45ADF-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMAJ45ADF-13 is usually 5 days.
3.What payment methods are accepted for P4SMAJ45ADF-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMAJ45ADF-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMAJ45ADF-13?
P4SMAJ45ADF-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMAJ45ADF-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 P4SMAJ45ADF-13?
For technical support, including P4SMAJ45ADF-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMAJ45ADF-13 requirements.
6.How does Aetrix verify that P4SMAJ45ADF-13 is sourced from the original manufacturer or authorized distributors?
All P4SMAJ45ADF-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 P4SMAJ45ADF-13 meets industry standards.
7.What is the process for return or replacement of P4SMAJ45ADF-13?
All P4SMAJ45ADF-13 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMAJ45ADF-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 P4SMAJ45ADF-13 part is unused and in its original packaging.
Return procedure for P4SMAJ45ADF-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMAJ45ADF-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…
