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Vishay General Semiconductor - Diodes Division SMA6J20AHM3/61
- Part No.:
- SMA6J20AHM3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA6J20AHM3/61.pdf
- Description:
- TVS DIODE 20VWM 31.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMA6J20AHM3/61 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 20 V stand-off voltage (VWM), 22.2–24.5 V breakdown voltage (VBR at IT = 1 mA), 31.4 V maximum clamping voltage at 19.1 A (10/1000 μs), 600 W peak pulse power rating, and operates from –55 °C to +150 °C junction temperature - used for protecting MOSFETs and ICs in industrial power supplies.
For engineers reviewing the SMA6J20AHM3/61 datasheet, SMA6J20AHM3/61 pinout, SMA6J20AHM3/61 application, or SMA6J20AHM3/61 equivalent, key selection criteria include clamping voltage at rated IPP, unidirectional polarity, MSL Level 1 moisture sensitivity, halogen-free RoHS compliance (M3 suffix), and compatibility with automated SMT placement on PCBs with 5.0 mm × 5.0 mm copper pads per terminal.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal bias it presents high impedance (< 0.2 μA leakage at 20 V), then rapidly avalanches when reverse voltage exceeds VBR (22.2–24.5 V), limiting transient energy via low dynamic resistance (0.361 Ω) to hold VC ≤ 31.4 V at 19.1 A. Its response time is sub-nanosecond, enabling protection against ESD and inductive switching spikes.
The device uses silicon avalanche junction technology in a planar construction, optimized for fast turn-on and stable clamping across temperature (αT = 9.4 × 10⁻⁴ /°C). Thermal resistance is 120 °C/W junction-to-ambient (on recommended pad layout), supporting 4 W steady-state dissipation at TA = 50 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - Maximum continuous reverse operating voltage before significant leakage begins; defines safe working margin below clamping threshold. |
| VBR (min/max) | 22.2 V / 24.5 V at 1 mA - Ensures reliable avalanche initiation within tight tolerance; critical for predictable clamping onset. |
| VC at IPP | 31.4 V at 19.1 A (10/1000 μs) - Clamping voltage seen by protected circuit during standardized surge; determines stress on downstream components. |
| PPPM (10×1000 μs) | 600 W - Peak transient energy handling capacity under long-duration surges; defines robustness against lightning-induced transients. |
| IFSM | 50 A - Non-repetitive forward surge current rating; supports safe operation during accidental forward-biased fault events. |
| TJ max. | +150 °C - Maximum junction temperature; enables use in high-ambient industrial environments without derating penalties. |
| RθJA | 120 °C/W - Thermal resistance to ambient on standard 5 mm × 5 mm pads; informs heatsinking requirements for sustained power dissipation. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, unidirectional polarity with cathode indicated by molded band. Dimensions: 4.50 mm × 2.79 mm × 2.20 mm (L × W × H); matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-impedance reference; completes clamping loop during overvoltage events. |
| Cathode | Protected line connection / transient sink | Connected to line being protected (e.g., 24 V rail); avalanche conduction occurs from cathode to anode during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional polarity | Enables precise clamping only on negative transients relative to reference; avoids interference with DC bias on positive rails. |
| MSL Level 1 rating | Allows unlimited floor life and reflow at 260 °C peak without baking - simplifies SMT manufacturing flow. |
| Halogen-free & RoHS-compliant (M3) | Meets environmental compliance mandates for industrial and telecom equipment without compromising thermal or electrical performance. |
| Low dynamic resistance (RD) | 0.361 Ω ensures minimal voltage overshoot during high-current transients, improving protection margin for sensitive ICs. |
| 150 °C TJ max. | Supports operation in enclosed enclosures or near heat sources without thermal shutdown or parameter drift. |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
Use Scenario: Protection of gate drivers and IGBTs against inductive kickback from relay coils and motor windings in PLC output modules. IC Role / Device Role / Timing Role: Shunt clamping device placed across DC bus or gate-source terminals to limit voltage spikes to < 32 V. Use Value: Prevents destructive gate oxide rupture in MOSFETs by holding transient voltage below 31.4 V at 19.1 A, extending system reliability in factory automation. | Use Scenario: Input-stage surge suppression on 24 V/48 V telecom rectifier outputs exposed to lightning-induced surges on outdoor plant wiring. IC Role / Device Role / Timing Role: Primary transient suppressor on secondary-side DC distribution rails feeding PoE controllers and PHY ICs. Use Value: Absorbs 600 W (10/1000 μs) without degradation, maintaining regulated output integrity during Category A/B surge events per IEC 61000-4-5. |
| Automotive Body Control Modules | Consumer Appliance Power Inputs |
Use Scenario: Reverse-polarity and load-dump protection on 12 V battery-fed microcontroller power rails in BCMs. IC Role / Device Role / Timing Role: Unidirectional TVS connected between VCC and GND to clamp load-dump transients up to 35 V. Use Value: Withstands 50 A IFSM and clamps at 31.4 V, ensuring MCU reset logic remains functional during ISO 16750-2 Pulse 5a events. | Use Scenario: Surge protection on AC-DC adapter input lines in smart home hubs and white goods control boards. IC Role / Device Role / Timing Role: First-line defense against EFT/burst noise and capacitor-switching transients on primary-side rectified DC. Use Value: Low leakage (< 0.2 μA at 20 V) prevents standby power loss; MSL Level 1 enables direct placement into high-volume reflow lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6J20A-E3/61 | RoHS-compliant but not halogen-free; same VWM, VBR, VC, and package; differs only in plating composition (E3 vs. M3). | Acceptable where halogen-free requirement is not mandated (e.g., non-EU commercial products). | Select SMA6J20A-E3/61 if environmental compliance allows standard RoHS without halogen restriction. |
| SMCJ20A-M3 | Same VWM/VBR/VC specs but in larger SMC (DO-214AB) package; higher PPPM (1500 W), lower RθJA (50 °C/W), and higher IFSM (100 A). | Better suited for higher-energy transients or thermally constrained layouts requiring improved power handling. | Choose SMCJ20A-M3 when surge energy exceeds 600 W or board layout permits larger footprint for enhanced thermal performance. |
Compared with SMA6J20AHM3/61, SMA6J20A-E3/61 offers identical electrical performance with standard RoHS compliance, while SMCJ20A-M3 provides 2.5× higher surge power rating and superior thermal dissipation in a larger package - enabling design flexibility across cost, compliance, and ruggedness tiers.
Availability
SMA6J20AHM3/61 is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, and automotive body control modules requiring stable component supply, halogen-free compliance, and MSL Level 1 manufacturability.
Supply support for SMA6J20AHM3/61 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 application-specific optimization.
The SMA6J series is part of Vishay's Transient Voltage Suppressor portfolio, engineered for high-speed clamping in space-constrained SMT applications across industrial, telecom, and automotive systems where consistent surge immunity and process compatibility are essential.
FAQ
What is the clamping voltage of the SMA6J20AHM3/61 at its rated peak pulse current?
The SMA6J20AHM3/61 has a maximum clamping voltage (VC) of 31.4 V at 19.1 A peak pulse current under the 10/1000 μs waveform condition. This value is measured per JEDEC standards and reflects the actual voltage imposed on the protected circuit during a standardized surge event - a critical parameter for verifying margin against downstream component voltage ratings. The SMA6J20AHM3/61 maintains this clamping performance across its full operating temperature range.
Does the SMA6J20AHM3/61 support automated SMT assembly without special handling?
Yes, the SMA6J20AHM3/61 is qualified to MSL Level 1 per J-STD-020, with a maximum lead-free reflow peak temperature of 260 °C and unlimited floor life - enabling direct placement into standard high-volume SMT lines without baking or dry-pack requirements. Its SMA (DO-214AC) package geometry and matte tin-plated leads comply with J-STD-002 solderability standards, ensuring consistent wetting and joint reliability for the SMA6J20AHM3/61.
How does the halogen-free M3 suffix affect the electrical performance of the SMA6J20AHM3/61?
The M3 suffix on the SMA6J20AHM3/61 indicates halogen-free, RoHS-compliant construction with no impact on electrical parameters: VWM (20 V), VBR (22.2–24.5 V), VC (31.4 V), and PPPM (600 W) remain identical to non-halogen-free variants like SMA6J20A-E3/61. The difference lies solely in molding compound chemistry - verified per JESD201 Class 2 whisker testing - ensuring the SMA6J20AHM3/61 meets strict environmental mandates without trade-offs in surge protection capability.
Can the SMA6J20AHM3/61 be used in bidirectional transient protection circuits?
No, the SMA6J20AHM3/61 is specified for unidirectional polarity only, with cathode marked by a band and designed to clamp reverse-biased transients only. It does not provide symmetrical clamping for AC-coupled or bipolar signal lines. For bidirectional protection, a dedicated bidirectional TVS such as SMBJ20A or a back-to-back diode configuration would be required - the SMA6J20AHM3/61 must be applied with correct orientation relative to DC bias.
What is the thermal resistance and steady-state power dissipation capability of the SMA6J20AHM3/61?
The SMA6J20AHM3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on the recommended 5.0 mm × 5.0 mm copper pads per terminal. At ambient temperature TA = 50 °C, it supports 4 W of continuous power dissipation (PD), which governs safe operation under sustained leakage or low-duty-cycle surge conditions - a key design constraint when sizing PCB copper area for the SMA6J20AHM3/61 in thermally demanding environments.
SMA6J20AHM3/61 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):
- 20V
- Voltage - Breakdown (Min):
- 22.2V
- Voltage - Clamping (Max) @ Ipp:
- 31.4V
- Current - Peak Pulse (10/1000µs):
- 19.1A
- 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)
SMA6J20AHM3/61 FAQ
1.How can I place an order for SMA6J20AHM3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6J20AHM3/61 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 SMA6J20AHM3/61 reliable?
The price and inventory of SMA6J20AHM3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA6J20AHM3/61 is usually 5 days.
3.What payment methods are accepted for SMA6J20AHM3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6J20AHM3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6J20AHM3/61?
SMA6J20AHM3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6J20AHM3/61 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 SMA6J20AHM3/61?
For technical support, including SMA6J20AHM3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6J20AHM3/61 requirements.
6.How does Aetrix verify that SMA6J20AHM3/61 is sourced from the original manufacturer or authorized distributors?
All SMA6J20AHM3/61 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 SMA6J20AHM3/61 meets industry standards.
7.What is the process for return or replacement of SMA6J20AHM3/61?
All SMA6J20AHM3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMA6J20AHM3/61, 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 SMA6J20AHM3/61 part is unused and in its original packaging.
Return procedure for SMA6J20AHM3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA6J20AHM3/61 Tags
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