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Vishay General Semiconductor - Diodes Division SMA6J8.0AHM3/5A
- Part No.:
- SMA6J8.0AHM3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA6J8.0AHM3/5A.pdf
- Description:
- TVS DIODE 8VWM 12.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,171
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Product details
Overview
SMA6J8.0AHM3/5A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features a 8.0 V stand-off voltage (VWM), 8.89–9.83 V breakdown voltage (VBR at IT = 1 mA), 12.5 V maximum clamping voltage (VC) at 48.0 A peak pulse current (IPP), and 600 W peak pulse power (10/1000 μs). It protects MOSFETs, ICs, and sensor signal lines in industrial and telecom equipment.
For engineers reviewing the SMA6J8.0AHM3/5A datasheet, SMA6J8.0AHM3/5A pinout, SMA6J8.0AHM3/5A application, or SMA6J8.0AHM3/5A equivalent, key selection criteria include clamping performance at 48 A, unidirectional polarity, SMA package thermal resistance (RθJA = 120 °C/W), junction temperature range (–55 to +150 °C), and compliance with J-STD-020 MSL level 1.
Technical Context
This TVS diode operates as a voltage-clamping protection device triggered by reverse-biased avalanche breakdown. Its dynamic resistance (RD = 0.056 Ω) and low clamping ratio (VC/VBR ≈ 1.4) ensure rapid suppression of transient energy while minimizing overshoot during 10/1000 μs surges up to 600 W.
Designed for PCB-mounted surge immunity, it uses matte tin-plated leads solderable per J-STD-002 and JESD 22-B102, with cathode indicated by a color band. The SMA (DO-214AC) case meets UL 94 V-0 and supports automated placement without derating below 25 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - Maximum continuous reverse voltage before clamping begins; sets operating margin above circuit nominal voltage. |
| VBR (min/max) | 8.89 V / 9.83 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering across temperature and unit variation. |
| VC at IPP | 12.5 V at 48.0 A (10/1000 μs) - Clamped voltage seen by protected IC/MOSFET during worst-case surge; defines safe stress limit. |
| PPPM (10/1000 μs) | 600 W - Peak transient energy absorption capability under standard lightning-surge waveform; determines survivability. |
| ID at VWM | 20 μA max - Reverse leakage at stand-off voltage; negligible loading on 3.3 V/5 V/8 V supply or signal rails. |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in enclosed industrial enclosures without forced cooling. |
| RθJA | 120 °C/W - Thermal resistance junction-to-ambient on standard 5.0 mm × 5.0 mm copper pads; guides PCB copper area design. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, unidirectional, cathode denoted by color band. Dimensions: 4.50 mm × 2.79 mm × 2.20 mm (L × W × H); RoHS-compliant, halogen-free (M3 suffix), MSL level 1, LF peak 260 °C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-impedance return plane; completes clamping loop during surge events. |
| Cathode | Protected line connection / high-side clamp node | Connected to I/O line or power rail being protected; avalanche conduction occurs from cathode to anode. |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMA package | Enables high-density PCB layouts and compatibility with automated SMT assembly lines without height interference. |
| Clamping voltage ≤12.5 V at 48 A | Ensures downstream 8 V-rated components remain within absolute maximum ratings during IEC 61000-4-5 surge events. |
| MSL level 1 moisture sensitivity | Eliminates bake-out requirement prior to reflow; supports direct placement from reel into production line. |
| 150 °C max junction temperature | Supports sustained operation in sealed industrial enclosures with ambient temperatures up to +85 °C. |
| Matte tin-plated leads | Guarantees solderability per J-STD-002 Class 2 and whisker resistance per JESD 201 Class 2. |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
Use Scenario: Protection of gate drivers and microcontrollers against inductive kickback from relay coils and solenoid switching. IC Role / Device Role / Timing Role: Unidirectional TVS placed between gate driver output and ground to clamp negative transients. Use Value: Prevents latch-up or oxide damage in 8 V-tolerant logic inputs by limiting voltage to ≤12.5 V during 48 A surges. | Use Scenario: Input-stage surge suppression on 48 V DC telecom rectifier outputs exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary clamping device on DC bus before DC/DC converters and PMICs. Use Value: Absorbs 600 W (10/1000 μs) without degradation, maintaining system uptime per GR-1089-CORE requirements. |
| Automotive Body Control Modules | Consumer Sensor Interfaces |
Use Scenario: CAN bus power line protection in BCMs subjected to load dump and jump-start transients. IC Role / Device Role / Timing Role: Stand-off clamping element on 12 V supply rail feeding CAN transceivers and MCU peripherals. Use Value: Withstands 50 A IFSM surge and maintains VWM = 8.0 V margin above nominal 12 V system, preventing false resets. | Use Scenario: ESD and EFT protection on analog sensor signal lines (e.g., temperature, pressure) in smart home hubs. IC Role / Device Role / Timing Role: Low-leakage (20 μA) shunt clamp on 3.3 V or 5 V sensor output traces. Use Value: Limits transient overshoot to ≤12.5 V while adding <1 pF junction capacitance-no signal integrity impact on kHz-range analog signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6J8.0A-E3/5A | Same electrical specs; RoHS-compliant but not halogen-free; base P/N-E3 vs. M3. | Acceptable where halogen-free material is not mandated by end-equipment environmental standards. | Select SMA6J8.0AHM3/5A when compliance with IEC 61249-2-21 or JEDEC JS709E is required. |
| SMCJ8.0A-M3 | Higher PPPM (1500 W @ 10/1000 μs); larger SMC (DO-214AB) package; RθJA = 35 °C/W. | Suitable for higher-energy surges but requires larger PCB footprint and different pad layout. | Choose SMA6J8.0AHM3/5A for space-constrained designs needing 600 W rating in minimal area. |
Compared with SMA6J8.0A-E3/5A, the HM3/5A variant adds halogen-free certification without altering clamping behavior; versus SMCJ8.0A-M3, it trades 2.5× lower surge capacity for 40 % smaller board area and simplified thermal management on standard FR-4.
Availability
SMA6J8.0AHM3/5A is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, and automotive body control modules requiring stable component supply and halogen-free compliance.
Supply support for SMA6J8.0AHM3/5A 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability and industrial-grade performance.
The SMA6J series is engineered specifically for robust, surface-mount transient suppression in harsh environments-targeting applications where space, thermal constraints, and regulatory compliance (halogen-free, RoHS) are critical.
FAQ
What is the clamping voltage of the SMA6J8.0AHM3/5A under a 10/1000 μs surge?
The SMA6J8.0AHM3/5A has a maximum clamping voltage (VC) of 12.5 V at 48.0 A peak pulse current under a 10/1000 μs waveform. This value is measured per the conditions specified in the Vishay datasheet (Document Number: 89460), confirming its ability to limit transient overvoltage to a safe level for downstream 8 V-rated components. The SMA6J8.0AHM3/5A achieves this with a dynamic resistance of 0.056 Ω.
Is the SMA6J8.0AHM3/5A suitable for automotive applications?
Yes, the SMA6J8.0AHM3/5A is rated for operating junction temperatures from –55 °C to +150 °C and meets J-STD-020 MSL level 1, making it suitable for under-hood and body-control module applications. Its 50 A IFSM rating and 8.0 V stand-off voltage provide margin against load-dump transients in 12 V systems. The SMA6J8.0AHM3/5A is not AEC-Q200 qualified, so final validation per vehicle-level requirements remains the customer's responsibility.
What does the "HM3/5A" suffix mean in SMA6J8.0AHM3/5A?
The "HM3" suffix indicates halogen-free, RoHS-compliant, industrial-grade construction per Vishay's material categorization (www.vishay.com/doc?99912); "5A" denotes packaging in 13-inch diameter plastic tape and reel, with 7500 units per reel. This differs from "E3/5A", which is RoHS-compliant but not halogen-free. The SMA6J8.0AHM3/5A thus satisfies strict environmental mandates without compromising electrical performance.
How does the thermal performance of SMA6J8.0AHM3/5A compare to larger package TVS diodes?
The SMA6J8.0AHM3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 5.0 mm × 5.0 mm copper pads-higher than SMC-packaged equivalents (e.g., SMCJ8.0A-M3 at 35 °C/W) due to smaller surface area. This means the SMA6J8.0AHM3/5A relies more on PCB copper for heat dissipation. Its 4 W power dissipation rating at TA = 50 °C reflects this constraint, and designers must verify layout compliance per the recommended pad dimensions in the datasheet.
Can SMA6J8.0AHM3/5A be used for bidirectional transient protection?
No, the SMA6J8.0AHM3/5A is unidirectional only, as explicitly stated in the Vishay datasheet. It conducts in reverse bias during overvoltage events and blocks forward current up to VF = 3.5 V at IF = 25 A. For bidirectional protection (e.g., AC lines or differential data buses), a dedicated bidirectional TVS such as SMBJ8.0CA or a back-to-back SMA6J8.0A pair would be required-not the SMA6J8.0AHM3/5A alone.
SMA6J8.0AHM3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 8V
- Voltage - Breakdown (Min):
- 8.89V
- Voltage - Clamping (Max) @ Ipp:
- 12.5V
- Current - Peak Pulse (10/1000µs):
- 48A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA6J8.0AHM3/5A FAQ
1.How can I place an order for SMA6J8.0AHM3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6J8.0AHM3/5A 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 SMA6J8.0AHM3/5A reliable?
The price and inventory of SMA6J8.0AHM3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA6J8.0AHM3/5A is usually 5 days.
3.What payment methods are accepted for SMA6J8.0AHM3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6J8.0AHM3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6J8.0AHM3/5A?
SMA6J8.0AHM3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6J8.0AHM3/5A 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 SMA6J8.0AHM3/5A?
For technical support, including SMA6J8.0AHM3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6J8.0AHM3/5A requirements.
6.How does Aetrix verify that SMA6J8.0AHM3/5A is sourced from the original manufacturer or authorized distributors?
All SMA6J8.0AHM3/5A 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 SMA6J8.0AHM3/5A meets industry standards.
7.What is the process for return or replacement of SMA6J8.0AHM3/5A?
All SMA6J8.0AHM3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA6J8.0AHM3/5A, 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 SMA6J8.0AHM3/5A part is unused and in its original packaging.
Return procedure for SMA6J8.0AHM3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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