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Diodes Incorporated P4SMAJ30ADF-13
- Part No.:
- P4SMAJ30ADF-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- 2-SMD, Flat Leads
- Datasheet:
-
P4SMAJ30ADF-13.pdf
- Description:
- TVS DIODE 30VWM 48.4VC D-FLAT
- Quantity:
- Payment:
- Shipping:
Inventory:9,593
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Product details
Overview
P4SMAJ30ADF-13 from Diodes Incorporated is a 400W surface-mount transient voltage suppressor (TVS) diode in D-FLAT package, designed for unidirectional overvoltage protection on DC power rails and signal lines. It features a 30V reverse standoff voltage (VRWM), 33.3–36.8V breakdown voltage (VBR), 48.4V clamping voltage (VC) at 8.3A peak pulse current (IPP), and meets IEC 61000-4-2 ESD immunity (±30kV air/contact). Used in industrial power supplies and automotive body control modules to protect downstream ICs from lightning-induced surges.
For engineers reviewing the P4SMAJ30ADF-13 datasheet, P4SMAJ30ADF-13 pinout, P4SMAJ30ADF-13 application, or P4SMAJ30ADF-13 equivalent, key selection criteria include clamping voltage margin relative to protected IC VCC, thermal resistance under PCB layout constraints, peak pulse power derating above +25°C, and compliance with IEC 61000-4-2/4-4/4-5 surge standards.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt device: it remains high-impedance below VRWM (30V), avalanches at VBR (min 33.3V), and limits transient energy by clamping to ≤48.4V at 8.3A IPP under 10×1000µs waveform. Its glass-passivated junction ensures stable breakdown characteristics across temperature.
Thermal performance depends on PCB copper area: RθJA is 114°C/W on 1"×1" 2oz FR-4 pad, but improves to 88°C/W on optimized 0.4"×0.5" pad. Polarity is marked by cathode band; anode connects to ground or low-impedance return path during surge events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W (non-repetitive, 10×1000µs waveform; defines maximum transient energy absorption) |
| Reverse Standoff Voltage | 30V (maximum continuous DC or RMS voltage before leakage exceeds 1µA; sets operating rail limit) |
| Clamping Voltage | 48.4V @ 8.3A IPP (voltage seen by protected circuit during worst-case surge; must be below IC absolute max rating) |
| Breakdown Voltage | 33.3–36.8V @ 1mA IT (avalanche initiation range; determines turn-on consistency and tolerance margin) |
| ESD Rating | ±30kV contact/air per IEC 61000-4-2 (validates robustness against human-body-model discharges) |
| Junction-to-Ambient RθJA | 114°C/W (on standard 1"×1" 2oz FR-4; used to calculate max ambient temp for 150°C TJ limit) |
Pinout & Package
Package: D-FLAT (low-profile surface-mount, 2-terminal, cathode-banded, 0.035g weight, UL 94V-0 molded plastic case).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Transient current sink | Connected to protected line; conducts surge current to ground when voltage exceeds VBR |
| 2 (Anode) | Reference node | Typically tied to system ground or low-impedance return; completes shunt path during clamping |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die | Ensures stable VBR and low leakage (<1µA at VRWM) over 10-year field life and temperature cycling |
| D-FLAT package | Reduces board space by 40% vs. SMA; enables high-density routing near connectors and ports |
| IEC 61000-4-2 ESD rating | Eliminates need for secondary ESD protection stages in USB, CAN, and sensor interfaces |
| Lead-free & halogen-free | Complies with RoHS 3 (2015/863/EU) and JEDEC J-STD-020 moisture sensitivity Level 1 |
Applications
| Industrial PLC I/O Protection | Automotive Body Control Module |
|---|---|
Use Scenario: 24V DC input terminals on programmable logic controller modules exposed to load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between input rail and chassis ground to clamp surges before reaching upstream DC-DC converter. Use Value: 48.4V clamping ensures protected 3.3V/5V logic ICs remain within absolute maximum ratings during ISO 7637-2 Pulse 1/2a events. | Use Scenario: LIN bus transceiver power supply line in door module subjected to battery disconnect transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp on VBAT-supplied rail feeding LIN PHY and microcontroller. Use Value: 400W peak power rating handles 100ms load-dump pulses without degradation; D-FLAT footprint fits tight connector zones. |
| Telecom Power Feeds | Medical Diagnostic Equipment |
Use Scenario: -48V DC telecom power entry point vulnerable to lightning-induced common-mode surges on outdoor cabling. IC Role / Device Role / Timing Role: First-stage protection on primary DC input before DC-DC isolation stage. Use Value: 30V VRWM matches nominal -48V system with sufficient margin; 114°C/W RθJA allows thermal design on standard backplane copper. | Use Scenario: Patient-connected sensor interface boards requiring reinforced insulation and low capacitance. IC Role / Device Role / Timing Role: Secondary surge clamp on analog front-end supply rail adjacent to ADC and op-amps. Use Value: <10pF typical capacitance (per Fig. 2 at 30V) prevents signal integrity loss in 1MHz biomedical sensing paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30A | Same VRWM/VBR/VC specs but SMB package (larger footprint, 600W rating) | Higher power handling but 30% larger board area; less suitable for space-constrained ports | Select when surge duty cycle exceeds single-event or when thermal mass requires higher PM(AV) |
| 1.5SMC30A | Same electrical specs but SMC package (5.3mm × 4.5mm vs. D-FLAT's 4.6mm × 2.8mm); 1500W rating | Over-specified power rating increases cost and size; requires rework of pad layout | Choose only if legacy SMC footprint reuse is mandatory and board space permits |
Compared with SMBJ30A and 1.5SMC30A, P4SMAJ30ADF-13 delivers identical clamping performance in the smallest possible footprint-critical for modern compact designs where board area directly impacts BOM cost and assembly yield.
Availability
P4SMAJ30ADF-13 is available at Aetrix Electronics and suitable for industrial PLC I/O protection, automotive body control modules, telecom power feeds, and medical diagnostic equipment requiring stable component supply and long-term lifecycle support.
Supply support for P4SMAJ30ADF-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 P4SMAJ series belongs to Diodes' transient voltage suppressor portfolio, engineered specifically for robust, low-capacitance overvoltage protection in space-constrained, high-surge-environment applications such as automotive ECUs and industrial fieldbus nodes.
FAQ
What is the maximum allowable ambient temperature for continuous operation?
The P4SMAJ30ADF-13 has a junction temperature limit of +150°C. With RθJA = 114°C/W on standard PCB layout and PM(AV) = 1.0W, the max ambient temperature is +36°C at full power dissipation. Derating curves in Figure 1 show usable ambient up to +75°C when power is reduced proportionally.
Does this TVS diode require a series current-limiting resistor?
No. The P4SMAJ30ADF-13 is designed for direct shunt connection without external impedance. Its low dynamic impedance (calculated from ΔV/ΔI across VC curve) ensures effective clamping even with zero series resistance. Adding a resistor would increase clamping voltage and delay response.
How does its capacitance affect high-speed signal lines?
At VRWM = 30V, typical capacitance is <10pF (Fig. 2), making it suitable for LIN, RS-485, and 100kHz sensor interfaces. It is not recommended for >10MHz digital buses (e.g., USB 2.0, HDMI) due to potential signal rise-time degradation.
Is this part qualified for automotive AEC-Q200 stress testing?
No. The P4SMAJ30ADF-13 is rated for industrial temperature range (–55°C to +150°C) but is not AEC-Q200 qualified. For automotive-critical applications, Diodes offers the AEC-Q200-qualified P4SMAJ30AHE3 series with identical electrical specs and enhanced reliability screening.
P4SMAJ30ADF-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):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 8.3A
- 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
P4SMAJ30ADF-13 FAQ
1.How can I place an order for P4SMAJ30ADF-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMAJ30ADF-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 P4SMAJ30ADF-13 reliable?
The price and inventory of P4SMAJ30ADF-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMAJ30ADF-13 is usually 5 days.
3.What payment methods are accepted for P4SMAJ30ADF-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMAJ30ADF-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMAJ30ADF-13?
P4SMAJ30ADF-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMAJ30ADF-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 P4SMAJ30ADF-13?
For technical support, including P4SMAJ30ADF-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMAJ30ADF-13 requirements.
6.How does Aetrix verify that P4SMAJ30ADF-13 is sourced from the original manufacturer or authorized distributors?
All P4SMAJ30ADF-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 P4SMAJ30ADF-13 meets industry standards.
7.What is the process for return or replacement of P4SMAJ30ADF-13?
All P4SMAJ30ADF-13 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMAJ30ADF-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 P4SMAJ30ADF-13 part is unused and in its original packaging.
Return procedure for P4SMAJ30ADF-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMAJ30ADF-13 Tags
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ESD9B5.0ST5G
onsemi
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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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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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