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Alpha & Omega Semiconductor Inc. SMDJ5.0A
- Part No.:
- SMDJ5.0A
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMDJ5.0A.pdf
- Description:
- 1CH 5.0V UNIDIRECTIONAL 3000W SM
- Quantity:
- Payment:
- Shipping:
Inventory:6,326
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Product details
Overview
SMDJ5.0A from Alpha & Omega Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 5.0 V reverse standoff voltage (VRWM), 6.4–7.0 V breakdown voltage (VBR) at 10 mA, 9.2 V maximum clamping voltage (VC) at 326.1 A peak pulse current, and 3000 W peak pulse power dissipation on a 10/1000 µs waveform - enabling robust ESD and surge immunity in automotive power modules and industrial PLC I/O circuits.
For engineers reviewing the SMDJ5.0A datasheet, pinout, applications, or equivalent options, this part is selected for high-energy transient suppression where low clamping voltage, fast sub-1 ps response time, and DO-214AB package thermal performance (RθJA = 75 °C/W) are critical to protect downstream MOSFETs, microcontrollers, and CAN transceivers.
Technical Context
The SMDJ5.0A operates as a silicon avalanche diode with glass-passivated junction and unidirectional polarity, triggered when reverse voltage exceeds its specified VBR range. Its clamping behavior is defined by a 10/1000 µs standard surge waveform, with thermal limits constrained by TJ,max = 150 °C and RθJL = 15 °C/W to lead.
It supports single-pulse surge events up to 300 A (IFSM, 8.3 ms half-sine) and exhibits low leakage (IR ≤ 800 µA @ VRWM) and a temperature coefficient of ΔVBR = 0.1% × VBR per °C change - ensuring stable breakdown across industrial temperature ranges (–55 °C to +150 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 5.0 V - Maximum continuous reverse operating voltage before clamping begins; sets minimum system rail margin for reliable standby operation. |
| VBR @ IT=10mA | 6.4–7.0 V - Measured breakdown threshold defining turn-on precision; tight tolerance enables predictable protection timing. |
| Vc @ IPPM | 9.2 V - Clamped voltage at 326.1 A peak pulse; determines maximum stress imposed on protected ICs during surge events. |
| PPPM (10/1000µs) | 3000 W - Peak surge energy handling capacity; defines survivability against IEC 61000-4-5 Level 4 (4 kV) surges on 12 V systems. |
| IR @ VRWM | ≤800 µA - Reverse leakage at rated standoff; low value minimizes quiescent power loss in battery-powered applications. |
| TJ max | +150 °C - Maximum junction temperature; allows operation in under-hood automotive environments and sealed industrial enclosures. |
| Package | DO-214AB (SMC J-Bend) - Standardized surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal requirement; supports automated reflow and high-current PCB routing. |
Pinout & Package
DO-214AB (SMC J-Bend) package with cathode-indicating band; two-terminal device with no internal circuitry - anode and cathode terminals define unidirectional conduction path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction; connected to lower-potential side of protected line. | Provides return path for surge current during clamping; must be routed with low-inductance trace to ground or return plane. |
| Cathode | Current exit terminal during reverse clamping; marked by color band on package body. | Connected to protected node (e.g., MCU VDD input); establishes clamping reference to system ground or common rail. |
Key Features
| Feature | Design Value |
|---|---|
| Fast response time | Typically <1.0 ps - Enables clamping before transient energy couples into sensitive analog or digital circuitry. |
| Glass-passivated junction | Enhances long-term reliability and moisture resistance - critical for automotive under-hood and outdoor industrial deployments. |
| Low profile DO-214AB | Height ≤ 2.6 mm - Allows placement near connectors or edge-mounted components without mechanical interference. |
| MSL1 rating | Compatible with standard Pb-free reflow profiles up to 260 °C peak - eliminates pre-bake requirements and reduces assembly cost. |
| UL 94V-0 flammability | Self-extinguishing plastic housing - satisfies safety compliance for enclosed power supplies and medical auxiliary equipment. |
Applications
| Automotive Power Distribution | Industrial PLC Digital I/O Protection |
|---|---|
|
Use Scenario: 12 V battery rail protection in engine control units (ECUs) subjected to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Primary TVS clamp placed upstream of DC-DC converters and LDO regulators to limit transient voltage to safe levels. Use Value: 9.2 V clamping ensures protected regulators remain within absolute maximum ratings during 100 V/50 ms load dump events. |
Use Scenario: 24 V digital input module exposed to field-wiring induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Front-end transient suppressor on optocoupler input side, absorbing energy before signal conditioning circuitry. Use Value: 3000 W peak power rating handles repetitive 1 kV/500 A surges per IEC 61000-4-4 without degradation. |
| Telecom Power Supply Input | Medical Equipment Auxiliary Rails |
|
Use Scenario: -48 V DC telecom rectifier output filtering where lightning-induced surges threaten downstream DC-DC stages. IC Role / Device Role / Timing Role: Unidirectional TVS shunting positive-going transients on the negative-return rail configuration. Use Value: Low IR (≤800 µA) prevents excessive standby current draw in always-on network infrastructure. |
Use Scenario: Isolated 5 V logic supply rail in patient-connected diagnostic devices requiring low-leakage, high-reliability protection. IC Role / Device Role / Timing Role: Secondary-level surge limiter after primary AC-DC isolation, guarding microcontroller reset and communication interfaces. Use Value: UL 94V-0 housing and RoHS/Halogen-free construction meet IEC 60601-1 mechanical and material safety requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC5.0 | Same DO-214AB package, but lower PPPM (1500 W) and higher VC (11.2 V at 134 A); tighter VBR tolerance (±5%). | Lower surge capacity suits consumer-grade 5 V USB ports; insufficient for automotive load dump. | Select SAC5.0 only when system surge exposure is limited to IEC 61000-4-2 ESD (±15 kV air) and not higher-energy transients. |
| 1.5KE5.0A | Through-hole DO-15 package; identical electrical specs (VRWM=5.0 V, VC=9.2 V), but higher RθJA (100 °C/W) and no MSL1 rating. | Requires manual soldering or wave soldering; unsuitable for high-volume SMT production or lead-free reflow. | Choose 1.5KE5.0A only for legacy through-hole designs or prototyping where board space and thermal constraints are less critical. |
Compared with SAC5.0 and 1.5KE5.0A, the SMDJ5.0A delivers superior surge robustness (3000 W vs. 1500 W or same-power THT), optimized thermal performance for SMT assembly (RθJA = 75 °C/W), and full compatibility with modern lead-free manufacturing - making it the preferred choice for automotive and industrial surface-mount systems demanding repeatable, high-energy protection.
Availability
SMDJ5.0A is available at Aetrix Electronics and suitable for automotive power distribution, industrial PLC digital I/O protection, and telecom power supply input applications requiring stable component supply, consistent parametric performance, and full RoHS/Halogen-free compliance.
Supply support for SMDJ5.0A 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
Alpha & Omega Semiconductor (AOS) is a fabless power semiconductor company specializing in high-efficiency MOSFETs, TVS diodes, and power ICs for computing, consumer, industrial, and automotive markets.
The SMDJ5.0A belongs to AOS's SMDJ series of high-power surface-mount TVS diodes, engineered specifically for robust transient suppression in harsh electromagnetic environments - including automotive load dump, industrial switching noise, and telecom lightning surges.
FAQ
What is the clamping voltage of the SMDJ5.0A at its rated peak pulse current?
The SMDJ5.0A has a maximum clamping voltage (VC) of 9.2 V at 326.1 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured with the device mounted on 8.0 mm × 8.0 mm copper pads per terminal and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within their absolute maximum ratings.
Is the SMDJ5.0A suitable for bidirectional transient suppression?
No, the SMDJ5.0A is a unidirectional TVS diode, indicated by the "A" suffix. For bidirectional operation, the SMDJ5.0CA variant must be used. The SMDJ5.0A conducts only in reverse breakdown mode and blocks forward current above ~1.2 V; using it in bidirectional configurations risks failure during positive transients on the anode side.
What is the maximum operating temperature range for the SMDJ5.0A?
The SMDJ5.0A supports an operating junction and storage temperature range of –55 °C to +150 °C. Its thermal resistance from junction to ambient (RθJA) is 75 °C/W when mounted on specified 8.0 mm × 8.0 mm copper pads, enabling reliable operation in under-hood automotive environments and sealed industrial enclosures without active cooling.
Does the SMDJ5.0A meet lead-free and RoHS requirements?
Yes, the SMDJ5.0A is a certified AOS Green Product: it is Pb-free, RoHS compliant, and halogen-free per IEC 61249-2-21. Its matte tin lead finish meets J-STD-020 MSL1 reflow specifications with a maximum peak temperature of 260 °C, supporting full compatibility with modern lead-free manufacturing processes.
How does the SMDJ5.0A compare to the SMAJ5.0A in terms of surge capability?
The SMDJ5.0A offers significantly higher surge capability than the SMAJ5.0A: 3000 W PPPM versus 400 W, and 326.1 A IPPM versus 43.4 A (both on 10/1000 µs). This makes the SMDJ5.0A appropriate for high-energy threats like automotive load dump or industrial switching surges, whereas the SMAJ5.0A is intended for lower-energy ESD and signal-line protection.
SMDJ5.0A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Package/Case:
- DO-214AB, SMC
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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):
- 326.1A
- Power - Peak Pulse:
- 3000W (3kW)
- 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:
- DO-214AB
SMDJ5.0A FAQ
1.How can I place an order for SMDJ5.0A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDJ5.0A 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 SMDJ5.0A reliable?
The price and inventory of SMDJ5.0A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDJ5.0A is usually 5 days.
3.What payment methods are accepted for SMDJ5.0A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDJ5.0A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDJ5.0A?
SMDJ5.0A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDJ5.0A 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 SMDJ5.0A?
For technical support, including SMDJ5.0A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDJ5.0A requirements.
6.How does Aetrix verify that SMDJ5.0A is sourced from the original manufacturer or authorized distributors?
All SMDJ5.0A 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 SMDJ5.0A meets industry standards.
7.What is the process for return or replacement of SMDJ5.0A?
All SMDJ5.0A units undergo pre-shipment inspection (PSI). If there is an issue with SMDJ5.0A, 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 SMDJ5.0A part is unused and in its original packaging.
Return procedure for SMDJ5.0A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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