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Diodes Incorporated P4SMAJ26ADF-13
- Part No.:
- P4SMAJ26ADF-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- 2-SMD, Flat Leads
- Datasheet:
-
P4SMAJ26ADF-13.pdf
- Description:
- TVS DIODE 26VWM 42.1VC D-FLAT
- Quantity:
- Payment:
- Shipping:
Inventory:9,795
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Product details
Overview
P4SMAJ26ADF-13 from Diodes Incorporated is a 400W surface-mount transient voltage suppressor (TVS) diode designed for unidirectional overvoltage protection in DC power rails and signal lines. It features a reverse standoff voltage of 26 V, clamping voltage of 42.1 V at 9.5 A peak pulse current, and IEC 61000-4-2 ESD rating of ±30 kV (air/contact). Used in industrial power supplies and automotive body electronics to protect microcontrollers and interface ICs.
For engineers reviewing the P4SMAJ26ADF-13 datasheet, P4SMAJ26ADF-13 pinout, P4SMAJ26ADF-13 application, or P4SMAJ26ADF-13 equivalent, key selection criteria include clamping voltage margin relative to protected IC VDD, peak pulse current capability under 10/1000 µs transients, thermal resistance on PCB layout, and D-FLAT package compatibility with high-density routing.
Technical Context
This unidirectional TVS diode operates in avalanche breakdown mode during transient events, diverting surge current away from sensitive downstream components. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 µA at 26 V), while the D-FLAT package provides low thermal resistance (RθJA = 88 °C/W on 0.4"×0.5" FR-4 pad).
The device complies with IEC 61000-4-2 Level 4 ESD immunity (±30 kV contact/air) and withstands 40 A non-repetitive forward surge current per 8.3 ms half-sine wave. Clamping performance is specified per 10 × 1000 µs waveform, enabling reliable protection against lightning-induced surges and inductive switching spikes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400 W - Sustains single 10×1000 µs transients without failure |
| Reverse Standoff Voltage | 26 V - Maximum continuous DC operating voltage before conduction |
| Clamping Voltage | 42.1 V @ 9.5 A - Limits voltage seen by protected circuit during surge |
| Breakdown Voltage | 28.9–31.9 V @ 1 mA - Ensures reliable triggering above normal operating range |
| ESD Rating | ±30 kV (IEC 61000-4-2) - Protects against human-body-model and contact discharge events |
| Thermal Resistance | 88 °C/W (Junction-to-Ambient) - Requires minimum 0.4"×0.5" copper pad for rated power dissipation |
| Capacitance | 120 pF @ 0 V, 1 MHz - Low enough for USB 2.0 and RS-485 data line protection |
Pinout & Package
Package: D-FLAT (low-profile surface-mount, 2-terminal, cathode-banded anode-cathode orientation). Dimensions: 4.65 mm × 2.80 mm × 1.10 mm (L × W × H), weight ≈ 0.035 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode Band) | Cathode | Connected to higher-potential rail (e.g., VIN); conducts during positive transients |
| 2 | Anode | Connected to ground or lower-potential reference; completes surge current path |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die | Ensures long-term stability of breakdown voltage and leakage current over temperature and life |
| Low-profile D-FLAT package | Enables placement under connectors or in tight board spaces without height interference |
| Lead-free & RoHS 3 compliant | Meets EU Directive 2015/863/EU with <900 ppm Br, <900 ppm Cl, <1000 ppm Sb |
| UL 94V-0 flammability rating | Molded plastic case resists ignition and flame propagation in safety-critical enclosures |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module |
|---|---|
Use Scenario: 24 V DC input rail in programmable logic controller (PLC) power entry stage exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role: Unidirectional TVS placed between input and ground to clamp transients before upstream DC-DC converter. Use Value: 42.1 V clamping voltage provides 16 V margin above 26 V nominal rail, preventing damage to 36 V-rated input capacitors and MOSFET gate drivers. | Use Scenario: LIN bus transceiver power pin in door module subjected to battery disconnect transients and ESD events. IC Role / Device Role: Primary overvoltage clamp on VCC supply line, coordinated with local ceramic decoupling. Use Value: ±30 kV ESD rating exceeds ISO 10605 requirements; 120 pF capacitance avoids signal integrity degradation on 20 kbps LIN lines. |
| USB-C Port ESD Protection | RS-485 Transceiver Interface |
Use Scenario: VBUS line (5 V) in USB-C receptacle on portable medical device, subject to user-handling ESD. IC Role / Device Role: Secondary clamping device downstream of primary common-mode choke and upstream of USB PD controller. Use Value: 26 V standoff allows safe operation across full USB-C VBUS tolerance (4.5–5.5 V) while providing robust ±30 kV air-gap discharge protection. | Use Scenario: VCC pin of isolated RS-485 transceiver in factory automation node connected to long cable runs. IC Role / Device Role: Fast-response clamp on transceiver supply to prevent latch-up during induced lightning surges. Use Value: 400 W peak power rating handles 10×1000 µs surges up to 9.5 A, exceeding IEC 61000-4-5 Level 3 requirements (1 A/2 Ω). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ26A | Same 26 V standoff, but SMB package (higher RθJA = 110 °C/W); 600 W peak power | Larger footprint; better suited for lower-density boards with higher surge energy | Select when board space permits and surge energy exceeds 400 W capability |
| 1.5SMC27A | 27 V standoff, DO-214AB package, 1500 W peak power, higher clamping (45.7 V) | Higher clamping voltage reduces margin for 3.3 V/5 V logic; used where physical size less constrained | Choose only if system can tolerate 45.7 V clamping and requires >400 W surge handling |
Compared with SMBJ26A and 1.5SMC27A, P4SMAJ26ADF-13 offers optimal balance of low profile (D-FLAT), precise 26 V standoff, and verified 42.1 V clamping-critical for protecting modern low-voltage microcontrollers without overdesigning board area or thermal management.
Availability
P4SMAJ26ADF-13 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, USB-C port protection, and RS-485 interface circuits requiring stable component supply and consistent surge performance across production batches.
Supply support for P4SMAJ26ADF-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 and manufacturing operations across Asia and the Americas.
The P4SMAJ series belongs to Diodes' transient voltage suppression portfolio, engineered specifically for compact, high-reliability DC rail protection in space-constrained industrial and automotive applications where low-profile mounting and repeatable clamping are essential.
FAQ
What is the maximum operating temperature for P4SMAJ26ADF-13?
The device supports continuous operation from –55 °C to +150 °C junction temperature. At ambient temperatures above +75 °C, derating applies: power dissipation must be reduced linearly to zero at +150 °C, per Figure 1 in DS39017 Rev. 3-2. Thermal design must account for RθJA = 88 °C/W on recommended 0.4"×0.5" copper pad.
Does P4SMAJ26ADF-13 meet automotive AEC-Q200 stress testing requirements?
No-P4SMAJ26ADF-13 is not AEC-Q200 qualified. It is rated for industrial and commercial applications only. For automotive-grade TVS diodes, Diodes Incorporated offers the AEC-Q200-qualified D3SBxx series, which undergoes extended temperature cycling, humidity bias, and mechanical shock validation.
How does the D-FLAT package affect PCB layout compared to SMA or SMB packages?
The D-FLAT package has a 4.65 mm × 2.80 mm footprint with center-aligned terminals, requiring no lead bending or trimming. Its low 1.10 mm height enables placement under connectors or near edge-mount interfaces. Pad layout must follow Diodes' recommended dimensions (0.2"×0.25" copper) to achieve the 88 °C/W RθJA rating cited in the datasheet.
Can P4SMAJ26ADF-13 be used for bidirectional transient suppression?
No-it is a unidirectional TVS diode, optimized for clamping positive transients on DC rails referenced to ground. For bidirectional protection (e.g., AC lines or data pairs), use the complementary P4SMAJ26CA series, which features symmetrical breakdown in both polarities and identical 400 W rating.
P4SMAJ26ADF-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- 2-SMD, Flat Leads
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 26V
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 42.1V
- Current - Peak Pulse (10/1000µs):
- 9.5A
- 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
P4SMAJ26ADF-13 FAQ
1.How can I place an order for P4SMAJ26ADF-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMAJ26ADF-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 P4SMAJ26ADF-13 reliable?
The price and inventory of P4SMAJ26ADF-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMAJ26ADF-13 is usually 5 days.
3.What payment methods are accepted for P4SMAJ26ADF-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMAJ26ADF-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMAJ26ADF-13?
P4SMAJ26ADF-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMAJ26ADF-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 P4SMAJ26ADF-13?
For technical support, including P4SMAJ26ADF-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMAJ26ADF-13 requirements.
6.How does Aetrix verify that P4SMAJ26ADF-13 is sourced from the original manufacturer or authorized distributors?
All P4SMAJ26ADF-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 P4SMAJ26ADF-13 meets industry standards.
7.What is the process for return or replacement of P4SMAJ26ADF-13?
All P4SMAJ26ADF-13 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMAJ26ADF-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 P4SMAJ26ADF-13 part is unused and in its original packaging.
Return procedure for P4SMAJ26ADF-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMAJ26ADF-13 Tags
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ESD9B5.0ST5G
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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