My Inquiry
My Account
Alpha & Omega Semiconductor Inc. SMDJ7.0A
- Part No.:
- SMDJ7.0A
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMDJ7.0A.pdf
- Description:
- 1CH 7.0V UNIDIRECTIONAL 3000W SM
- Quantity:
- Payment:
- Shipping:
Inventory:3,620
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMDJ7.0A from Alpha & Omega Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC J-Bend) package, designed for high-energy surge protection in DC power lines and signal interfaces. It features 7.0 V reverse stand-off voltage, 7.78–8.60 V breakdown voltage at 10 mA, 12.0 V maximum clamping voltage at 250 A peak pulse current, and 3000 W peak pulse power rating on 10/1000 µs waveform.
For engineers reviewing the SMDJ7.0A datasheet, pinout, applications, or equivalent options, key selection considerations include clamping performance under 250 A surge, thermal resistance (15 °C/W junction-to-lead), unidirectional polarity with cathode band marking, and compliance with MSL Level 1 reflow profile (260 °C peak).
Technical Context
The SMDJ7.0A operates as a silicon avalanche diode optimized for fast transient suppression in industrial and automotive power rails. Its glass-passivated junction ensures stable breakdown behavior, while the low-profile DO-214AB package supports high-current handling via 8.0 mm × 8.0 mm copper pads per terminal.
It delivers sub-1.0 ps response time from 0 V to breakdown, supports 0.01% duty cycle repetitive surges, and maintains ≤200 µA reverse leakage at VRWM - critical for low-power standby circuits requiring minimal quiescent current drain.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 7.0 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC bias margin. |
| VBR @ IT=10 mA | 7.78–8.60 V - Measured breakdown range confirms tight tolerance for predictable turn-on threshold. |
| Vc @ IPPM=250 A | 12.0 V - Clamping voltage during 10/1000 µs surge; determines protected circuit's maximum transient stress. |
| PPPM | 3000 W - Peak pulse power capability on standard 10/1000 µs waveform; enables robust IEC 61000-4-5 Level 4 compliance. |
| RθJL | 15 °C/W - Junction-to-lead thermal resistance; allows direct PCB copper pad heat sinking for sustained surge duty. |
| IR @ VRWM | ≤200 µA - Reverse leakage at rated stand-off voltage; ensures minimal power loss in battery-backed or low-IQ systems. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in under-hood automotive or industrial enclosures. |
Pinout & Package
DO-214AB (SMC J-Bend) surface-mount package with molded plastic case, matte tin lead-free plating, and cathode indicated by color band. Terminals are solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward conduction | Connected to lower-potential side of protected line; not used in normal TVS operation. |
| Cathode | Clamping node / surge return path | Marked with color band; connected to higher-potential rail (e.g., VBUS); conducts avalanche current during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| Fast response time | <1.0 ps - Enables suppression before downstream ICs experience damaging voltage overshoot. |
| Glass passivated junction | Stable VBR drift <0.1% × VBR/°C - Ensures consistent clamping across temperature in automotive (-40 to +125 °C ambient). |
| Built-in strain relief | Reduces mechanical stress at lead-to-body interface - improves reliability in vibration-prone environments like motor drives. |
| MSL Level 1 rating | Reflow compatible up to 260 °C peak - eliminates pre-baking requirement for standard SMT assembly. |
| UL 94V-0 flammability | Self-extinguishing plastic housing - meets safety requirements for enclosed industrial power supplies. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of 12 V DC input rails against load dump and inductive switching transients in variable-frequency drives. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBUS and GND to clamp surges exceeding 7.0 V. Use Value: 3000 W peak power rating absorbs 100 V/350 ms load dump pulses without degradation, preserving gate drivers and MCU power supplies. | Use Scenario: Surge suppression on LIN bus power supply lines exposed to ISO 7637-2 Pulse 1 and Pulse 2a transients. IC Role / Device Role / Timing Role: Standoff-clamp TVS on 12 V auxiliary rail feeding LIN transceivers and sensors. Use Value: 12.0 V clamping voltage ensures LIN PHY remains within absolute maximum ratings (<18 V) during 100 V/50 ms transients. |
| Telecom Power Feeds | Renewable Energy Inverters |
Use Scenario: DC input protection for PoE-powered remote radios subjected to lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary TVS on 48 V DC input stage upstream of DC/DC converters. Use Value: 250 A peak pulse current capacity handles 10/1000 µs surges up to 3 kV (open-circuit), meeting IEC 61000-4-5 Ed.3 Class 3. | Use Scenario: Protection of PV string combiner box monitoring circuits against induced surges from nearby lightning strikes. IC Role / Device Role / Timing Role: Secondary-level TVS on 5 V sensor supply rail isolated by optocouplers. Use Value: ≤200 µA reverse leakage prevents measurable error in shunt-based current sensing at microamp-level precision. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC7.0 | Same DO-214AB package, but lower PPPM (1500 W) and higher Vc (13.5 V @ 150 A) | Limited to lower-energy surges; unsuitable for IEC 61000-4-5 Level 4 | Select SMDJ7.0A when 3000 W surge immunity is required. |
| SMLJ7.0A | Same electrical specs but in smaller DO-214AA (SMA) package; RθJA = 100 °C/W vs. 75 °C/W | Lower thermal mass limits sustained surge repetition rate | Choose SMDJ7.0A for higher thermal robustness in high-ambient-temperature environments. |
Compared with SAC7.0 and SMLJ7.0A, the SMDJ7.0A provides superior thermal management (RθJL = 15 °C/W), higher surge energy handling (3000 W), and tighter clamping (12.0 V), making it optimal for high-reliability 12 V DC power rail protection where board space permits DO-214AB mounting.
Availability
SMDJ7.0A is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power feeds requiring stable component supply and long-term lifecycle support.
Supply support for SMDJ7.0A 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 MOSFETs, TVS diodes, and power ICs for efficiency-critical applications.
The SMDJ series is designed specifically for high-power transient suppression in automotive, industrial, and telecom infrastructure, emphasizing rugged packaging, repeatable clamping, and AEC-Q200 readiness.
FAQ
What is the clamping voltage of the SMDJ7.0A under maximum rated surge current?
The SMDJ7.0A exhibits a maximum clamping voltage (Vc) of 12.0 V when subjected to its rated peak pulse current of 250 A on a 10/1000 µs waveform. This value is measured at the device terminals with specified PCB copper pad layout (8.0 mm × 8.0 mm per terminal), ensuring realistic system-level protection margins for downstream 12 V-rated components.
Is the SMDJ7.0A suitable for bidirectional surge protection?
No, the SMDJ7.0A is a unidirectional TVS diode, identified by the "A" suffix and single cathode band marking. For bidirectional operation, the SMDJ7.0CA variant must be used - it provides symmetrical clamping in both polarities and is marked with "DDM" code and no polarity band.
What is the maximum allowable junction temperature for continuous operation of the SMDJ7.0A?
The SMDJ7.0A has a maximum junction temperature (TJ max) of +150 °C, validated per JEDEC standards. This rating applies under steady-state conditions with proper PCB thermal design; derating curves in the datasheet define allowable power dissipation versus ambient temperature and lead temperature.
Does the SMDJ7.0A meet RoHS and halogen-free requirements?
Yes, the SMDJ7.0A is an AOS Green Product: fully RoHS compliant, lead-free, and halogen-free per IEC 61249-2-21. It carries the AOS green logo and conforms to AOS' published Green Policy, including reduced bromine and chlorine content below regulatory thresholds.
How does the SMDJ7.0A compare to standard SMA-package TVS diodes in thermal performance?
The SMDJ7.0A in DO-214AB offers significantly better thermal performance than SMA-packaged equivalents: its junction-to-lead thermal resistance is 15 °C/W versus ~30–40 °C/W for SMA, enabling higher surge repetition rates and improved reliability in thermally constrained designs.
SMDJ7.0A 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):
- 7V
- Voltage - Breakdown (Min):
- 7.78V
- Voltage - Clamping (Max) @ Ipp:
- 12V
- Current - Peak Pulse (10/1000µs):
- 250A
- 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
SMDJ7.0A FAQ
1.How can I place an order for SMDJ7.0A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDJ7.0A 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 SMDJ7.0A reliable?
The price and inventory of SMDJ7.0A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDJ7.0A is usually 5 days.
3.What payment methods are accepted for SMDJ7.0A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDJ7.0A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDJ7.0A?
SMDJ7.0A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDJ7.0A 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 SMDJ7.0A?
For technical support, including SMDJ7.0A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDJ7.0A requirements.
6.How does Aetrix verify that SMDJ7.0A is sourced from the original manufacturer or authorized distributors?
All SMDJ7.0A 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 SMDJ7.0A meets industry standards.
7.What is the process for return or replacement of SMDJ7.0A?
All SMDJ7.0A units undergo pre-shipment inspection (PSI). If there is an issue with SMDJ7.0A, 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 SMDJ7.0A part is unused and in its original packaging.
Return procedure for SMDJ7.0A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMDJ7.0A 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 and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
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…
