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Vishay General Semiconductor - Diodes Division SMA6J12A-E3/61
- Part No.:
- SMA6J12A-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA6J12A-E3/61.pdf
- Description:
- TVS DIODE 12VWM 23.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,935
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Product details
Overview
SMA6J12A-E3/61 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping transient overvoltages 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 (10/1000 μs), and operates from –55 °C to +150 °C - used to protect MOSFETs, ICs, and sensor signal lines in industrial power supplies.
For engineers reviewing the SMA6J12A-E3/61 datasheet, SMA6J12A-E3/61 pinout, SMA6J12A-E3/61 application, or SMA6J12A-E3/61 equivalent, key selection criteria include clamping voltage under 31.9 A surge, unidirectional polarity compatibility with DC-biased rails, thermal resistance (RθJA = 120 °C/W), RoHS-compliant matte tin terminations, and MSL Level 1 moisture sensitivity rating for reflow compatibility.
Technical Context
This TVS diode operates as a voltage-clamped crowbar device triggered above its reverse breakdown threshold. Its dynamic resistance (RD = 0.128 Ω) and low clamping ratio (VC/VBR ≈ 1.41) ensure rapid suppression of transients induced by inductive switching or ESD events on 12 V DC rails.
It is rated for 50 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), supports automated SMT placement, and maintains stable leakage (< 0.2 μA at VWM) up to 85 °C junction temperature - validated per J-STD-020 with LF peak at 260 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - maximum continuous reverse voltage before significant leakage; sets operating margin for 12 V nominal systems. |
| VBR (min/max) | 13.3 V / 14.7 V at 1 mA - defines precise turn-on threshold for transient detection and clamping initiation. |
| VC @ IPPM | 18.8 V at 31.9 A (10/1000 μs) - peak clamped voltage seen by protected circuit during standardized surge event. |
| PPPM (10/1000 μs) | 600 W - energy-handling capacity for long-duration transients like load dump or inductive kick. |
| ID @ VWM | ≤ 0.2 μA at 25 °C - ensures negligible standby power loss and signal integrity on high-impedance nodes. |
| RθJA | 120 °C/W - thermal resistance from junction to ambient on standard PCB pads; informs derating above 50 °C ambient. |
| Polarity | Unidirectional - protects only against negative transients relative to cathode; requires correct orientation on DC rails. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with UL 94 V-0 flammability rating; cathode indicated by color band; matte tin-plated leads compliant with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction or transient clamping | Connected to lower-potential side of protected line (e.g., ground or return path); determines unidirectional clamping direction. |
| Cathode | Current exit point; marked by color band | Connected to higher-potential side (e.g., 12 V rail); reverse-biased during normal operation, avalanches during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| Clamping performance | VC = 18.8 V at 31.9 A (10/1000 μs) enables robust protection of 12 V logic and power ICs without overstressing downstream components. |
| Thermal reliability | RθJA = 120 °C/W and TJ max = +150 °C support sustained operation in enclosed industrial enclosures with limited airflow. |
| Manufacturing readiness | MSL Level 1 rating and 260 °C lead-free reflow compatibility allow direct integration into high-volume automated SMT lines without baking. |
| Environmental compliance | E3 suffix denotes RoHS-compliant, industrial-grade construction with whisker-resistant matte tin terminations (JESD 201 Class 2). |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module (BCM) Inputs |
|---|---|
Use Scenario: Suppresses load-dump transients (up to 35 V, 100 ms) on 12 V input rails of DIN-rail mounted PLC power modules. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed upstream of DC/DC converter input to limit voltage excursion during alternator regulation failure. Use Value: Prevents latch-up or permanent damage to primary-side controller ICs by holding rail voltage ≤18.8 V during 31.9 A surge events. |
Use Scenario: Protects microcontroller GPIO inputs connected to door lock actuators and window motor drivers subject to inductive flyback. IC Role / Device Role / Timing Role: Fast-response transient suppressor on 12 V switched inputs, absorbing 8/20 μs surges up to 4000 W without degradation. Use Value: Maintains signal integrity and prevents false triggering by limiting transient-induced voltage overshoot to <19 V at microcontroller pins. |
| Telecom Remote Sensor Interface | Consumer Appliance Motor Drive Feedback |
Use Scenario: Shields RS-485 transceiver bias rails and termination resistors in outdoor security camera hubs exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Standoff-rated protector on +12 V bias supply, activated only during >13.3 V transients while remaining invisible to steady-state operation. Use Value: Enables >100,000 surge cycles without parameter drift due to low leakage (<0.2 μA) and stable VBR temperature coefficient (8.3 × 10⁻⁴/°C). |
Use Scenario: Safeguards hall-effect sensor outputs in washing machine motor control boards subjected to commutation noise. IC Role / Device Role / Timing Role: Low-capacitance (typ. <100 pF at 0 V) TVS on 5 V or 12 V analog feedback lines to avoid signal distortion. Use Value: Preserves signal fidelity with <0.2 μA leakage at 12 V and clamps sub-100 ns spikes before they propagate to ADC inputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6J12AHE3/61 | Same electrical specs; halogen-free (M3) variant with identical VWM, VBR, VC, and PPPM ratings. | No functional difference; selected when halogen-free compliance is mandated by end-equipment environmental standards. | Choose SMA6J12AHE3/61 if RoHS + halogen-free certification (e.g., IEC 61249-2-21) is required; otherwise SMA6J12A-E3/61 suffices. |
| 1.5SMC12A | Higher RθJA (150 °C/W), larger SMC (DO-214AB) package, same VWM/VBR but 1.5 kW PPPM (10/1000 μs) rating. | Used where higher surge energy handling is needed and board space allows larger footprint; not drop-in due to different pad layout and thermal profile. | Select 1.5SMC12A only when >600 W surge capability is required and PCB layout accommodates SMC outline; SMA6J12A-E3/61 is optimal for space-constrained SMA layouts. |
Compared with SMA6J12AHE3/61, the SMA6J12A-E3/61 offers identical protection performance with standard RoHS compliance; versus 1.5SMC12A, it trades 900 W lower peak power for 30 % smaller footprint and 25 % better thermal resistance on equivalent copper area - making it preferred for compact industrial and automotive ECUs.
Availability
SMA6J12A-E3/61 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, and telecom infrastructure requiring stable component supply with full traceability and lifecycle management.
Supply support for SMA6J12A-E3/61 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 and application-specific performance.
The SMA6JxxA series is part of Vishay's Transient Voltage Suppressor portfolio, engineered for robust, low-profile overvoltage protection in space-constrained DC power and interface circuits across industrial, automotive, and communications equipment.
FAQ
What is the maximum clamping voltage of the SMA6J12A-E3/61 under a 10/1000 μs surge?
The SMA6J12A-E3/61 has a maximum clamping voltage (VC) of 18.8 V when subjected to a 10/1000 μs waveform at 31.9 A peak pulse current. This value is measured per standard test conditions (TA = 25 °C, mounted on 5.0 mm × 5.0 mm copper pads) and defines the upper voltage limit imposed on protected circuitry during such transients. The SMA6J12A-E3/61 maintains this clamping performance across its specified operating temperature range.
Is SMA6J12A-E3/61 suitable for bidirectional transient protection?
No, the SMA6J12A-E3/61 is a unidirectional TVS diode and provides protection only against negative-going transients relative to its cathode terminal. It must be oriented with cathode toward the higher-potential side of the protected line. For bidirectional protection, a dedicated bidirectional device such as SMA6J12CA would be required - the SMA6J12A-E3/61 does not support symmetrical clamping in both polarities.
What is the leakage current specification for SMA6J12A-E3/61 at its stand-off voltage?
The SMA6J12A-E3/61 exhibits a maximum reverse leakage current (ID) of 0.2 μA at its 12 V stand-off voltage (VWM) and 25 °C ambient temperature. This ultra-low leakage ensures minimal power loss and no measurable loading effect on high-impedance sensor or reference circuits. Leakage remains ≤1 μA up to 85 °C, as confirmed in the Vishay datasheet Electrical Characteristics table.
Does SMA6J12A-E3/61 meet lead-free reflow requirements?
Yes, the SMA6J12A-E3/61 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 terminations comply with J-STD-002 and JESD 22-B102 for solderability, and the E3 suffix explicitly denotes RoHS-compliant, industrial-grade construction - all verified in the official Vishay document 89460.
How does the thermal resistance of SMA6J12A-E3/61 affect its power derating?
The SMA6J12A-E3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W on standard PCB pads. Its power dissipation rating drops linearly above TA = 50 °C - for example, at 75 °C ambient, usable power reduces to ~2.5 W. Derating follows Figure 2 in the datasheet, and the SMA6J12A-E3/61 must be applied within this curve to maintain TJ ≤ 150 °C under continuous or repetitive surge conditions.
SMA6J12A-E3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 23.5V
- Current - Peak Pulse (10/1000µs):
- 157A (8/20µs)
- Power - Peak Pulse:
- 4000W (4kW)
- 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-214AC (SMA)
SMA6J12A-E3/61 FAQ
1.How can I place an order for SMA6J12A-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6J12A-E3/61 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 SMA6J12A-E3/61 reliable?
The price and inventory of SMA6J12A-E3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA6J12A-E3/61 is usually 5 days.
3.What payment methods are accepted for SMA6J12A-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6J12A-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6J12A-E3/61?
SMA6J12A-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6J12A-E3/61 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 SMA6J12A-E3/61?
For technical support, including SMA6J12A-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6J12A-E3/61 requirements.
6.How does Aetrix verify that SMA6J12A-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMA6J12A-E3/61 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 SMA6J12A-E3/61 meets industry standards.
7.What is the process for return or replacement of SMA6J12A-E3/61?
All SMA6J12A-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMA6J12A-E3/61, 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 SMA6J12A-E3/61 part is unused and in its original packaging.
Return procedure for SMA6J12A-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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