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Diodes Incorporated SMAJ5.0A-13
- Part No.:
- SMAJ5.0A-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ5.0A-13.pdf
- Description:
- TVS DIODE 5VWM 9.2VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:4,181
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Product details
Overview
SMAJ5.0A-13 from Diodes Incorporated is a unidirectional 400W surface-mount transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power lines and signal interfaces. It features a 5.0V reverse standoff voltage (VRWM), 6.4–7.25V breakdown voltage (VBR) at 10mA, 9.2V max clamping voltage (VC) at 43.5A peak pulse current (IPP), and operates from –55°C to +150°C.
For engineers reviewing the SMAJ5.0A-13 datasheet, SMAJ5.0A-13 pinout, SMAJ5.0A-13 application, or SMAJ5.0A-13 equivalent, key selection criteria include clamping performance under 8.3ms surge, unidirectional polarity handling, SMA package thermal limits, and compliance with IEC 61000-4-2/4-4/4-5 ESD/EFT/surge immunity requirements.
Technical Context
This TVS diode uses a glass-passivated silicon junction to achieve fast response time (<1ps) and low clamping ratio (VC/VBR ≈ 1.44). Its unidirectional configuration provides forward conduction path during negative transients while blocking normal forward bias-enabling use in polarized supply rails and data line protection where polarity is fixed.
The device is rated for 400W non-repetitive peak pulse power (10/1000μs waveform), derates linearly above 25°C ambient, and sustains 40A single half-sine surge (8.3ms, JEDEC method). Steady-state dissipation is limited to 1.0W at lead temperature TL = 75°C, requiring careful PCB copper area design for thermal management.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 5.0 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC working limit. |
| VBR (min/max) | 6.40–7.25 V @ IT = 10 mA - Breakdown threshold range; ensures reliable turn-on across process variation and temperature. |
| VC @ IPP | 9.2 V @ 43.5 A - Clamped voltage during 8.3ms surge; determines protected circuit's maximum transient exposure. |
| PPK | 400 W - Peak pulse power rating (10/1000μs); defines surge energy absorption capability per event. |
| IR @ VRWM | 800 μA - Max reverse leakage at 5.0V; impacts quiescent power loss and high-impedance node integrity. |
| Tj Range | –55°C to +150°C - Junction temperature operating range; supports automotive under-hood and industrial control environments. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with UL 94V-0 flammability rating, cathode band polarity indicator, and matte tin lead finish (RoHS compliant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink during reverse transient | Connected to protected line; conducts surge current to ground when VRWM exceeded. |
| Cathode | Reference terminal / polarity marker | Marked with band; tied to system ground or higher-potential rail depending on protection topology. |
Key Features
| Feature | Design Value |
|---|---|
| 400W peak pulse power | Enables robust protection against IEC 61000-4-5 Level 4 (4kV/2Ω) surges without derating in compact SMA footprint. |
| Glass-passivated die | Improves long-term reliability and stability of VBR and leakage vs. temperature cycling and humidity exposure. |
| Fast response time | Sub-nanosecond turn-on ensures clamping occurs before sensitive downstream ICs experience overvoltage stress. |
| Unidirectional polarity | Prevents forward conduction during normal operation while providing full reverse surge suppression capability. |
Applications
| Industrial PLC I/O Protection | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Protecting 24V digital input channels from load dump and inductive switching transients in programmable logic controllers. IC Role / Device Role / Timing Role: Primary clamping element placed between field input and optocoupler/signal conditioner input. Use Value: Limits transient voltage to ≤9.2V, preventing damage to 5V-tolerant interface ICs while surviving repeated 40A surges. | Use Scenario: Safeguarding LIN bus transceiver power pins against battery voltage spikes during alternator load dump events. IC Role / Device Role / Timing Role: Standoff-rated TVS on VCC rail upstream of regulator, activated only during >5.0V overvoltage conditions. Use Value: Maintains 5.0V system compatibility and meets ISO 7637-2 Pulse 5a immunity requirements with minimal board space. |
| USB 2.0 VBUS Line Protection | DC Power Supply Input Stage |
Use Scenario: Suppressing ESD and hot-plug transients on USB host VBUS lines before reaching USB controller or power switch. IC Role / Device Role / Timing Role: First-line defense against ±15kV contact ESD (IEC 61000-4-2) on 5V supply rail. Use Value: Clamps ESD events to <9.2V within <1ns, preserving USB PHY functionality without adding series impedance. | Use Scenario: Front-end surge suppression for 5V/12V wall adapter outputs feeding microcontroller-based appliances. IC Role / Device Role / Timing Role: Parallel-connected transient absorber across output capacitor, shunting surge energy to ground. Use Value: Absorbs up to 400W for 10/1000μs surges while maintaining VRWM margin over nominal 5V output. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ5.0A-TP from Microchip | Same VRWM (5.0V), slightly higher VC (9.6V @ 43.5A), same SMA package and RoHS compliance. | Validated in Microchip reference designs for USB-C PD source protection; identical thermal footprint. | Select when sourcing from Microchip-authorized channels or requiring extended qualification reports (AEC-Q200 not claimed). |
| P6SMB5.0A from ON Semiconductor | Higher PPK (600W), larger SMB package (5.3mm × 4.6mm), same VRWM and VBR range, 9.2V VC. | Preferred for higher-energy surge environments (e.g., PoE injectors); requires PCB layout revision due to larger body. | Choose when 400W is insufficient and board space allows SMB footprint; otherwise, SMAJ5.0A-13 offers superior density. |
Compared with SMAJ5.0A-TP and P6SMB5.0A, SMAJ5.0A-13 delivers optimal balance of surge rating, compact SMA size, and production-ready qualification-making it ideal for space-constrained 5V systems where 400W clamping suffices and lead-free compliance is mandatory.
Availability
SMAJ5.0A-13 is available at Aetrix Electronics and suitable for industrial PLC I/O protection, automotive BCM power rails, and USB 2.0 VBUS line protection requiring stable component supply across multi-year production cycles.
Supply support for SMAJ5.0A-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 consumer markets.
The SMAJ series belongs to Diodes' transient voltage suppressor product line, engineered specifically for surface-mount surge and ESD protection in space-constrained, high-volume applications demanding consistent clamping performance and JEDEC-compliant surge endurance.
FAQ
Is SMAJ5.0A-13 bidirectional or unidirectional?
SMAJ5.0A-13 is unidirectional. Its part number lacks the "C" suffix (e.g., SMAJ5.0CA-13), confirming cathode-anode polarity. It conducts only during reverse-biased overvoltage events and blocks forward current-suitable for protecting grounded supply rails or polarized signal lines.
What is the maximum clamping voltage at 10A surge current?
Per the datasheet's clamping curve (Fig. 3), the typical clamping voltage at 10A (10/1000μs waveform) is approximately 6.8V. This is significantly lower than the 9.2V rated VC at 43.5A, reflecting the device's nonlinear voltage-current characteristic and improved protection margin at lower surge levels.
Can SMAJ5.0A-13 replace SMAJ6.0A-13 in a 5V system?
No-SMAJ6.0A-13 has VRWM = 6.0V, making it unsuitable for strict 5V systems where transient margin must stay below 5.0V. SMAJ5.0A-13's 5.0V VRWM ensures no leakage or premature clamping during nominal 5V operation, whereas SMAJ6.0A-13 risks false triggering near 5.5–6.0V tolerances.
Does SMAJ5.0A-13 meet AEC-Q200 for automotive use?
No-SMAJ5.0A-13 is not AEC-Q200 qualified. While its operating temperature range (–55°C to +150°C) meets automotive under-hood requirements, Diodes Incorporated does not list this variant in its AEC-Q200-certified TVS portfolio. For qualified alternatives, consider the D3V3Mxx series or consult Diodes' automotive-grade SMAJ variants.
SMAJ5.0A-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-214AC, SMA
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5V
- Voltage - Breakdown (Min):
- 6.4V
- Voltage - Clamping (Max) @ Ipp:
- 9.2V
- Current - Peak Pulse (10/1000µs):
- 43.5A
- 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:
- SMA
SMAJ5.0A-13 FAQ
1.How can I place an order for SMAJ5.0A-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ5.0A-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 SMAJ5.0A-13 reliable?
The price and inventory of SMAJ5.0A-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ5.0A-13 is usually 5 days.
3.What payment methods are accepted for SMAJ5.0A-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ5.0A-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ5.0A-13?
SMAJ5.0A-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ5.0A-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 SMAJ5.0A-13?
For technical support, including SMAJ5.0A-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ5.0A-13 requirements.
6.How does Aetrix verify that SMAJ5.0A-13 is sourced from the original manufacturer or authorized distributors?
All SMAJ5.0A-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 SMAJ5.0A-13 meets industry standards.
7.What is the process for return or replacement of SMAJ5.0A-13?
All SMAJ5.0A-13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ5.0A-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 SMAJ5.0A-13 part is unused and in its original packaging.
Return procedure for SMAJ5.0A-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ5.0A-13 Tags
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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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