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Vishay General Semiconductor - Diodes Division SMA6J12AHM3/5A
- Part No.:
- SMA6J12AHM3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA6J12AHM3/5A.pdf
- Description:
- TVS DIODE 12VWM 18.8VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,708
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Product details
Overview
SMA6J12AHM3/5A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, with 12 V stand-off voltage (VWM), 13.3–14.7 V breakdown voltage (VBR at IT = 1 mA), and 18.8 V maximum clamping voltage (VC) at 31.9 A peak pulse current (IPP) under 10/1000 μs waveform. It delivers 600 W peak pulse power and is used to protect MOSFETs, ICs, and sensor signal lines against inductive switching transients in industrial and telecom equipment.
For engineers reviewing the SMA6J12AHM3/5A datasheet, SMA6J12AHM3/5A pinout, SMA6J12AHM3/5A application, or SMA6J12AHM3/5A equivalent, key selection criteria include clamping voltage margin vs. protected device VDS/VDD, unidirectional polarity requirement, 600 W 10/1000 μs surge rating, thermal resistance (RθJA = 120 °C/W), and halogen-free RoHS-compliant M3 suffix packaging for high-reliability PCB assembly.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: it remains high-impedance below VWM = 12 V, avalanches at VBR ≥ 13.3 V, and clamps transient energy to ≤18.8 V at 31.9 A. Its dynamic resistance (RD = 0.128 Ω) ensures low voltage overshoot during fast surges.
Designed for surface-mount automation on standard PCBs, it meets J-STD-020 MSL Level 1 (260 °C peak reflow), uses matte tin-plated leads per J-STD-002, and features UL 94 V-0 molding compound. The cathode band denotes polarity, and operation is limited to TJ = –55 °C to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - Maximum continuous reverse voltage before leakage exceeds 0.2 μA; sets upper limit for safe DC bias on protected line. |
| VBR (min/max) | 13.3 V / 14.7 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering above system operating voltage. |
| VC @ IPP | 18.8 V at 31.9 A (10/1000 μs) - Clamping voltage seen by downstream circuitry during standardized surge event. |
| PPPM (10/1000 μs) | 600 W - Peak transient energy absorption capability under industry-standard long-duration surge test. |
| RθJA | 120 °C/W - Junction-to-ambient thermal resistance on 5.0 mm × 5.0 mm copper pads; determines derating above TA = 25 °C. |
| Polarity | Unidirectional - Blocks reverse voltage only; requires correct orientation relative to protected circuit's ground reference. |
| Package | SMA (DO-214AC) - Standardized surface-mount outline with 2.54 mm lead pitch; compatible with automated pick-and-place. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with cathode band marking; terminals are matte tin-plated, solderable per J-STD-002; meets JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction or transient clamping | Connected to lower-potential node (e.g., GND or return path); defines direction of protection in unidirectional configuration. |
| Cathode | Current exit terminal; marked by color band | Connected to higher-potential line (e.g., VBUS or signal rail); clamping occurs when cathode-to-anode voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Clamping performance | VC = 18.8 V at 31.9 A ensures protected ICs with 20 V absolute max ratings remain within safe margin during 10/1000 μs transients. |
| Thermal reliability | RθJA = 120 °C/W enables stable operation up to +150 °C junction temperature with minimal PCB copper area (5 mm × 5 mm pads). |
| Manufacturing compatibility | MSL Level 1 rating and matte tin plating support lead-free reflow at 260 °C without popcorn or delamination risk. |
| Environmental compliance | M3 suffix indicates halogen-free, RoHS-compliant construction meeting industrial-grade reliability and regulatory requirements. |
Applications
| Industrial Motor Drives | Telecom Power Interfaces |
|---|---|
Use Scenario: Protection of gate drivers and IGBTs against turn-off voltage spikes from inductive motor windings. IC Role / Device Role / Timing Role: Shunt clamping device placed across DC bus or gate-source terminals to clamp transients below MOSFET/IGBT VDS(max). Use Value: Limits voltage overshoot to ≤18.8 V during 31.9 A surges, preventing cumulative dielectric stress and premature failure in 400 V systems. |
Use Scenario: Surge suppression on -48 V DC power feeds and RS-485 data lines in base station power modules. IC Role / Device Role / Timing Role: Unidirectional TVS connected between power rail and chassis ground to divert lightning-induced common-mode surges. Use Value: Withstands 600 W (10/1000 μs) and 4000 W (8/20 μs) pulses, meeting IEC 61000-4-5 Level 3 immunity requirements. |
| Automotive Body Control Modules | Consumer Sensor Signal Lines |
Use Scenario: Input protection for LIN bus transceivers and microcontroller GPIOs exposed to load-dump events. IC Role / Device Role / Timing Role: Low-leakage (ID ≤ 0.2 μA at 12 V) TVS placed directly at connector entry point to suppress ISO 7637-2 Pulse 1/2a. Use Value: VWM = 12 V matches nominal vehicle battery voltage; clamping at 18.8 V avoids false triggering while safeguarding 5 V logic interfaces. |
Use Scenario: ESD and EFT protection for analog outputs of temperature/humidity sensors in smart home hubs. IC Role / Device Role / Timing Role: Fast-response unidirectional suppressor on 3.3 V or 5 V analog signal paths to prevent latch-up in ADC front-ends. Use Value: Low dynamic resistance (0.128 Ω) minimizes clamping voltage rise during sub-100 ns ESD events, preserving signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6J12AHE3/5A | E3 suffix: RoHS-compliant, industrial grade, but not halogen-free; same electrical specs and package. | No difference in circuit protection function; differs only in material compliance (halogen content). | Select SMA6J12AHM3/5A when halogen-free certification is required per IPC-1752 or customer environmental policy. |
| SMCJ12A | Larger SMC (DO-214AB) package; 1500 W PPPM (10/1000 μs); higher VC = 19.9 V at 75.8 A; RθJA = 30 °C/W. | Higher power handling but requires larger PCB footprint and different pad layout; better for >1 kV surge environments. | Choose SMA6J12AHM3/5A for space-constrained designs where 600 W suffices and automated placement density is critical. |
Compared with SMA6J12AHE3/5A, SMA6J12AHM3/5A adds halogen-free compliance without electrical trade-offs; versus SMCJ12A, it trades 2.5× lower surge power for 60 % smaller footprint and optimized reflow compatibility-ideal for compact industrial PCBs.
Availability
SMA6J12AHM3/5A is available at Aetrix Electronics and suitable for industrial motor drives, telecom power interfaces, and automotive body control modules requiring stable component supply with halogen-free compliance and automated assembly support.
Supply support for SMA6J12AHM3/5A 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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and manufacturability.
The SMA6J series is part of Vishay's Transient Voltage Suppressor portfolio, engineered specifically for robust, automated-surface-mount surge protection in harsh industrial and telecom environments.
FAQ
What is the clamping voltage of SMA6J12AHM3/5A at its rated peak pulse current?
The SMA6J12AHM3/5A has a maximum clamping voltage (VC) of 18.8 V at 31.9 A peak pulse current under the 10/1000 μs waveform. This value is measured per JEDEC standards and reflects the actual voltage imposed on protected circuitry during a standardized surge event. The SMA6J12AHM3/5A maintains this clamping performance across its specified operating temperature range.
Does SMA6J12AHM3/5A support lead-free reflow soldering?
Yes, SMA6J12AHM3/5A meets J-STD-020 Moisture Sensitivity Level 1 and supports peak reflow temperatures up to 260 °C, making it fully compatible with lead-free soldering processes. Its matte tin-plated leads comply with J-STD-002 for solderability, and the M3 suffix confirms halogen-free, RoHS-compliant construction suitable for modern high-reliability assembly lines.
How does the M3 suffix differ from E3 in SMA6J12AHM3/5A?
The M3 suffix in SMA6J12AHM3/5A indicates halogen-free, RoHS-compliant, industrial-grade construction, whereas E3 denotes RoHS-compliant and industrial-grade but not halogen-free. Both share identical electrical characteristics, thermal performance, and package dimensions. The SMA6J12AHM3/5A is selected when halogen-free compliance is mandated by environmental policies or end-equipment certifications.
What is the maximum operating junction temperature for SMA6J12AHM3/5A?
The SMA6J12AHM3/5A has a maximum operating junction temperature (TJ max.) of +150 °C, with a storage temperature range from –55 °C to +150 °C. Its thermal resistance (RθJA = 120 °C/W) is characterized on PCBs with 5.0 mm × 5.0 mm copper pads per terminal, enabling accurate derating calculations above ambient temperatures.
Can SMA6J12AHM3/5A be used for bidirectional transient protection?
No, SMA6J12AHM3/5A is strictly unidirectional and must be oriented with cathode toward the protected line and anode toward ground or lower potential. For bidirectional protection, a separate symmetric TVS such as SMBJ12CA or SMCJ12CA is required. Using SMA6J12AHM3/5A in reverse-biased configuration will not provide clamping in the forward direction and may fail catastrophically under positive transients.
SMA6J12AHM3/5A 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):
- 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)
SMA6J12AHM3/5A FAQ
1.How can I place an order for SMA6J12AHM3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6J12AHM3/5A 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 SMA6J12AHM3/5A reliable?
The price and inventory of SMA6J12AHM3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA6J12AHM3/5A is usually 5 days.
3.What payment methods are accepted for SMA6J12AHM3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6J12AHM3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6J12AHM3/5A?
SMA6J12AHM3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6J12AHM3/5A 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 SMA6J12AHM3/5A?
For technical support, including SMA6J12AHM3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6J12AHM3/5A requirements.
6.How does Aetrix verify that SMA6J12AHM3/5A is sourced from the original manufacturer or authorized distributors?
All SMA6J12AHM3/5A 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 SMA6J12AHM3/5A meets industry standards.
7.What is the process for return or replacement of SMA6J12AHM3/5A?
All SMA6J12AHM3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA6J12AHM3/5A, 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 SMA6J12AHM3/5A part is unused and in its original packaging.
Return procedure for SMA6J12AHM3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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