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Vishay General Semiconductor - Diodes Division SMA6J12AHM3/61
- Part No.:
- SMA6J12AHM3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA6J12AHM3/61.pdf
- Description:
- TVS DIODE 12VWM 18.8VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMA6J12AHM3/61 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 12 V stand-off voltage (VWM), 13.3–14.7 V breakdown voltage (VBR at IT = 1 mA), 18.8 V maximum clamping voltage at 31.9 A (10/1000 µs), 600 W peak pulse power rating, and operates across –55 °C to +150 °C junction temperature range - deployed in industrial sensor interfaces and MOSFET gate protection.
For engineers reviewing the SMA6J12AHM3/61 datasheet, SMA6J12AHM3/61 pinout, SMA6J12AHM3/61 application, or SMA6J12AHM3/61 equivalent, key selection criteria include clamping voltage under 31.9 A surge, unidirectional polarity requirement, thermal resistance (RθJA = 120 °C/W), RoHS/halogen-free compliance (M3 suffix), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR (13.3–14.7 V), it avalanches to limit transient energy by diverting surge current to ground. Its dynamic resistance (RD = 0.128 Ω) ensures low-voltage overshoot during 10/1000 µs surges up to 31.9 A.
The device is rated for 600 W (10/1000 µs) and 4000 W (8/20 µs) peak pulse power, with leakage current ≤0.2 µA at 12 V and forward voltage VF = 3.5 V at 25 A (300 µs pulse). It meets MSL level 1 per J-STD-020 and supports reflow up to 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - maximum continuous reverse operating voltage before significant leakage; sets threshold for circuit protection without false triggering. |
| VBR min/max | 13.3 V / 14.7 V at IT = 1 mA - defines guaranteed avalanche onset range; ensures consistent clamping behavior across production lots. |
| VC @ IPP | 18.8 V at 31.9 A (10/1000 µs) - maximum clamped voltage seen by protected IC/MOSFET during standardized surge event. |
| PPPM (10/1000 µs) | 600 W - peak transient energy handling capacity under long-duration surge; determines survivability against inductive switch-off spikes. |
| IFSM | 50 A - non-repetitive forward surge rating; supports robustness during accidental reverse-bias misapplication or fault conditions. |
| TJ max. | +150 °C - maximum junction temperature; enables operation in high-ambient industrial environments with adequate PCB copper thermal relief. |
| RθJA | 120 °C/W - thermal resistance junction-to-ambient on standard 5.0 mm × 5.0 mm pads; informs derating requirements above TA = 25 °C. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, unidirectional polarity with cathode indicated by molded band. Matte tin-plated leads, RoHS-compliant and halogen-free (M3 suffix), qualified per JESD 201 Class 2 whisker test.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to lower-potential side of protected line; must be routed with low-inductance path to ground for effective clamping. |
| Cathode | Current exit terminal during forward conduction; marked with color band | Connected to higher-potential side (e.g., VCC rail or signal line); establishes unidirectional clamping direction from cathode to anode. |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMA package | Enables high-density PCB layouts and compatibility with automated pick-and-place equipment (7" tape/reel, 1800 pcs). |
| MSL Level 1 rating | Allows unlimited floor life and single-reflow processing at 260 °C peak, eliminating moisture sensitivity handling overhead. |
| Halogen-free & RoHS-compliant (M3) | Meets environmental compliance requirements for industrial and telecom end-equipment without compromising surge performance. |
| Clamping ratio VC/VBR | ≤1.41 (18.8 V / 13.3 V) - tight clamping margin ensures protected devices remain within safe absolute maximum ratings during transients. |
| Low dynamic resistance (RD) | 0.128 Ω - minimizes voltage overshoot during fast-rising surges, critical for safeguarding sensitive gate oxides and logic inputs. |
Applications
| Industrial Sensor Interface Protection | MOSFET Gate Driver Protection |
|---|---|
Use Scenario: Protects analog front-end inputs of pressure/temperature sensors exposed to ESD and relay-coil flyback in factory automation PLC modules. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between sensor signal line and ground, clamping transients before they reach ADC input or op-amp buffer. Use Value: Limits induced voltage to ≤18.8 V during 31.9 A surges, preventing latch-up or permanent damage to 3.3 V/5 V signal chain components. |
Use Scenario: Shields high-side N-channel MOSFET gate drivers from voltage spikes caused by parasitic inductance in motor drive half-bridges. IC Role / Device Role / Timing Role: Connected cathode-to-gate, anode-to-source; clamps negative-going gate-source transients during fast switching transitions. Use Value: Maintains gate oxide integrity by suppressing VGS undershoot below –18.8 V, avoiding irreversible dielectric breakdown in 60 V-rated MOSFETs. |
| Telecom Line Card Surge Protection | Consumer Power Adapter Input Stage |
Use Scenario: Installed on DC input rails of base station remote radio units subject to lightning-induced surges on outdoor power feeds. IC Role / Device Role / Timing Role: Primary shunt protector upstream of DC-DC converters, absorbing 4000 W (8/20 µs) surges per IEC 61000-4-5 Level 4. Use Value: Withstands repeated 28 V line surges while maintaining <0.2 µA leakage at nominal 24 V input, ensuring no standby power penalty. |
Use Scenario: Safeguards AC-DC adapter primary-side rectifier output against mains overvoltage and capacitor discharge spikes. IC Role / Device Role / Timing Role: Placed across bulk capacitor terminals to clamp transient overvoltage before reaching PWM controller IC. Use Value: Delivers 600 W (10/1000 µs) clamping capability with 120 °C/W thermal resistance, enabling reliable operation without heatsink in compact adapters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6J12A-E3/61 | Same electrical specs, but RoHS-compliant with lead-free matte tin plating (E3 suffix); not halogen-free. | Approved for industrial applications where halogen-free is not mandated; identical thermal and surge performance. | Select SMA6J12A-E3/61 if halogen-free certification is unnecessary and cost optimization is prioritized. |
| SMCJ12A-M3 | Higher 1500 W (10/1000 µs) rating, DO-214AB (SMC) package, larger footprint, RθJA = 35 °C/W. | Used where higher surge endurance is required and board space allows larger SMC package; better thermal dissipation. | Choose SMCJ12A-M3 only when 600 W is insufficient and layout permits 7.11 mm × 6.22 mm footprint instead of SMA's 4.32 mm × 2.62 mm. |
Compared with SMA6J12AHM3/61, SMA6J12A-E3/61 offers identical protection performance with standard RoHS compliance, while SMCJ12A-M3 trades smaller size for significantly higher surge capacity and improved thermal management - making SMA6J12AHM3/61 optimal for space-constrained, halogen-free industrial designs requiring 600 W clamping.
Availability
SMA6J12AHM3/61 is available at Aetrix Electronics and suitable for industrial sensor interfaces, MOSFET gate driver circuits, and telecom line card surge protection requiring stable component supply, halogen-free compliance, and automated SMT assembly support.
Supply support for SMA6J12AHM3/61 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, precision, and industrial-grade qualification.
The SMA6JxxA series is part of Vishay's Transient Voltage Suppressor family, engineered specifically for robust, surface-mount overvoltage protection in harsh environments - targeting automotive, industrial control, and communications infrastructure.
FAQ
What is the clamping voltage of SMA6J12AHM3/61 at its rated peak pulse current?
The SMA6J12AHM3/61 has a maximum clamping voltage (VC) of 18.8 V at 31.9 A peak pulse current under the 10/1000 µs waveform condition. This value is measured per the standard test method defined in the Vishay datasheet and reflects the actual voltage seen by downstream components during surge events. The SMA6J12AHM3/61 maintains this clamping performance across its specified operating temperature range.
Is SMA6J12AHM3/61 compatible with lead-free reflow soldering processes?
Yes, SMA6J12AHM3/61 is qualified for lead-free reflow soldering with a maximum peak temperature of 260 °C, meeting J-STD-020 MSL Level 1 requirements. Its matte tin-plated terminals comply with J-STD-002 and JESD 22-B102 solderability standards. The SMA6J12AHM3/61 can undergo a single reflow cycle without degradation of electrical or mechanical performance.
How does the M3 suffix in SMA6J12AHM3/61 differ from E3?
The M3 suffix indicates halogen-free, RoHS-compliant construction with whisker-resistant plating per JESD 201 Class 2, whereas E3 denotes RoHS-compliant but not halogen-free. Both share identical electrical characteristics and package dimensions. The SMA6J12AHM3/61 is selected when regulatory or customer requirements mandate halogen-free materials in final assemblies.
What is the thermal resistance of SMA6J12AHM3/61, and how does it affect layout design?
The SMA6J12AHM3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 5.0 mm × 5.0 mm copper pads per terminal. This value requires PCB designers to allocate sufficient copper area for heat dissipation, especially under repetitive surge conditions. Derating curves in the datasheet show power reduction above TA = 25 °C - critical for sustained operation in enclosed industrial enclosures.
Can SMA6J12AHM3/61 be used for bidirectional transient suppression?
No, SMA6J12AHM3/61 is unidirectional only, with polarity indicated by the cathode band. It conducts and clamps only when reverse-biased beyond VBR. For bidirectional protection (e.g., AC lines or differential signals), a pair of SMA6J12AHM3/61 devices in series-opposing configuration or a dedicated bidirectional TVS such as SMBJ12CA would be required instead of the SMA6J12AHM3/61 alone.
SMA6J12AHM3/61 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):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 18.8V
- Current - Peak Pulse (10/1000µs):
- 31.9A
- 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)
SMA6J12AHM3/61 FAQ
1.How can I place an order for SMA6J12AHM3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6J12AHM3/61 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 SMA6J12AHM3/61 reliable?
The price and inventory of SMA6J12AHM3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA6J12AHM3/61 is usually 5 days.
3.What payment methods are accepted for SMA6J12AHM3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6J12AHM3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6J12AHM3/61?
SMA6J12AHM3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6J12AHM3/61 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 SMA6J12AHM3/61?
For technical support, including SMA6J12AHM3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6J12AHM3/61 requirements.
6.How does Aetrix verify that SMA6J12AHM3/61 is sourced from the original manufacturer or authorized distributors?
All SMA6J12AHM3/61 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 SMA6J12AHM3/61 meets industry standards.
7.What is the process for return or replacement of SMA6J12AHM3/61?
All SMA6J12AHM3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMA6J12AHM3/61, 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 SMA6J12AHM3/61 part is unused and in its original packaging.
Return procedure for SMA6J12AHM3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA6J12AHM3/61 Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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