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Vishay General Semiconductor - Diodes Division SMA6J28AHM3/61
- Part No.:
- SMA6J28AHM3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA6J28AHM3/61.pdf
- Description:
- TVS DIODE 28VWM 44VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMA6J28AHM3/61 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, with 28 V stand-off voltage (VWM), 31.1–34.4 V breakdown voltage (VBR), 44.0 V max clamping voltage at 13.6 A (10/1000 µs), 600 W peak pulse power rating, and 150 °C maximum junction temperature. It protects MOSFETs, ICs, and sensor signal lines against inductive switching transients and lightning surges in industrial and telecom equipment.
For engineers reviewing the SMA6J28AHM3/61 datasheet, SMA6J28AHM3/61 pinout, SMA6J28AHM3/61 application, or SMA6J28AHM3/61 equivalent, this page delivers verified electrical parameters, thermal resistance (RθJA = 120 °C/W), polarity marking (cathode band), JEDEC-compliant MSL level 1 handling, and halogen-free RoHS-compliant construction per JESD201 Class 2 whisker test.
Technical Context
This TVS diode operates as a unidirectional clamping device, triggered when reverse voltage exceeds its specified VBR range (31.1–34.4 V at IT = 1 mA). Its dynamic resistance (RD = 0.704 Ω) and low clamping ratio (VC/VBR ≈ 1.32) ensure effective overvoltage suppression during 10/1000 µs transients up to 600 W.
Designed for PCB mounting on 5.0 mm × 5.0 mm copper pads per terminal, it achieves thermal resistance of 120 °C/W (junction-to-ambient) and 25 °C/W (junction-to-lead), enabling reliable operation at TA = 50 °C with 4 W continuous power dissipation. The cathode band denotes polarity, and matte tin-plated leads comply with J-STD-002 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - Maximum DC or RMS voltage the device blocks without clamping; sets operating margin before transient activation. |
| VBR min/max | 31.1 V / 34.4 V at IT = 1 mA - Confirmed breakdown threshold range defining turn-on consistency across production lots. |
| VC @ IPP | 44.0 V at 13.6 A (10/1000 µs) - Clamped voltage seen by protected circuit under standardized surge; determines residual stress on downstream components. |
| PPPM (10×1000 µs) | 600 W - Peak surge energy absorption capability under industry-standard long-duration transient waveform. |
| IFSM | 50 A - Non-repetitive forward surge current rating; supports robust handling of accidental reverse-bias misapplication or fault conditions. |
| TJ max | +150 °C - Maximum allowable junction temperature; enables use in high-ambient industrial environments with appropriate PCB thermal design. |
| RθJA | 120 °C/W - Junction-to-ambient thermal resistance on standard PCB pad layout; used to calculate safe power derating above 25 °C ambient. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, unidirectional polarity, cathode indicated by molded band. Dimensions: 4.50 mm × 2.79 mm × 2.20 mm (L × W × H); weight 0.064 g; RoHS-compliant, halogen-free (M3 suffix), MSL Level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-impedance return node; completes clamping loop during overvoltage events. |
| Cathode | Protected line connection / transient sensing node | Connected to I/O line or power rail being protected; voltage rise beyond VBR triggers avalanche conduction to anode. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional clamping | Enables precise protection of DC-biased signal or power rails without affecting forward conduction paths. |
| MSL Level 1 rating | Supports standard SMT reflow without baking; compatible with automated assembly using 260 °C peak profile. |
| Halogen-free & RoHS | Fulfills environmental compliance requirements for industrial and telecom end-equipment without compromising surge robustness. |
| Low dynamic resistance (RD) | 0.704 Ω ensures minimal voltage overshoot during fast transients, improving clamping precision for sensitive ICs. |
| Junction capacitance | Not specified in provided data - not applicable for high-speed signal line protection where CJ impacts bandwidth. |
Applications
| Industrial Motor Drives | Telecom Power Interfaces |
|---|---|
Use Scenario: Protection of gate drivers and microcontroller I/O against back-EMF spikes from relay or solenoid switching. IC Role / Device Role / Timing Role: Unidirectional TVS placed between MOSFET gate and source, clamping transient-induced voltage excursions above 28 V. Use Value: Prevents gate oxide damage and logic upset by limiting transient voltage to ≤44.0 V at 13.6 A, preserving system reliability in factory automation. |
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: Standoff-rated TVS connected from power rail to chassis ground, activated only during lightning-induced surges exceeding 28 V. Use Value: Withstands 600 W (10/1000 µs) surges while maintaining <0.2 µA leakage at 28 V, ensuring low standby loss and long-term stability. |
| Automotive Body Control Modules | Consumer Sensor Signal Conditioning |
Use Scenario: Input protection for LIN bus transceivers and window motor control ICs exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS mounted at connector interface, shunting transient energy before reaching ASIC inputs. Use Value: 150 °C TJ max and 120 °C/W RθJA allow operation in under-hood environments with minimal heatsinking, meeting AEC-Q200 stress screening intent. |
Use Scenario: ESD and surge protection for analog outputs of temperature/humidity sensors in smart home hubs. IC Role / Device Role / Timing Role: Low-leakage (≤0.2 µA at VWM) TVS placed inline with 0–5 V sensor output, preserving signal integrity. Use Value: Clamps 8/20 µs surges up to 4000 W without degradation, enabling robust field deployment in ungrounded consumer enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6J28A-E3/61 | Same electrical specs, but RoHS-compliant with lead finish containing trace Pb (per exemption 7a); not halogen-free. | Acceptable where halogen-free requirement is waived; may be preferred for legacy qualification or cost-sensitive industrial BOMs. | Select SMA6J28A-E3/61 if Pb-containing finish is permitted and halogen-free status is not mandated by end-equipment standard. |
| SMCJ28A-M3/57T | Higher power rating (1500 W PPPM, 10/1000 µs), larger SMC (DO-214AB) package, same VWM/VBR/VC specs. | Suitable where higher surge margin is required and PCB space allows larger footprint; not drop-in due to different pad layout and thermal mass. | Choose SMCJ28A-M3/57T when system-level surge testing exceeds 600 W and board layout permits SMC package integration. |
Compared with SMA6J28AHM3/61, SMA6J28A-E3/61 offers identical protection performance with non-halogen-free construction, while SMCJ28A-M3/57T provides 2.5× higher surge power handling in a physically larger package-requiring layout revision but enabling enhanced field reliability in harsher surge environments.
Availability
SMA6J28AHM3/61 is available at Aetrix Electronics and suitable for industrial motor drives, telecom power interfaces, and automotive body control modules requiring stable component supply, halogen-free compliance, and MSL Level 1 manufacturability.
Supply support for SMA6J28AHM3/61 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, power efficiency, and industrial-grade qualification.
The SMA6JxxA series is part of Vishay's Transient Voltage Suppressor portfolio, engineered specifically for robust, surface-mount overvoltage protection in space-constrained industrial, telecom, and automotive applications where unidirectional clamping and high surge tolerance are critical.
FAQ
What is the clamping voltage of SMA6J28AHM3/61 under a 10/1000 µs surge?
The SMA6J28AHM3/61 has a maximum clamping voltage (VC) of 44.0 V at 13.6 A under a 10/1000 µs waveform. This value is measured per the standard test condition defined in the Vishay datasheet (Document Number 89460), and represents the peak voltage imposed on the protected circuit during that transient event. The SMA6J28AHM3/61 maintains this clamping performance consistently across its qualified temperature range.
Does SMA6J28AHM3/61 support automated SMT placement?
Yes, SMA6J28AHM3/61 is designed for automated surface-mount placement. Its SMA (DO-214AC) package features low-profile dimensions (4.50 mm × 2.79 mm), matte tin-plated leads compliant with J-STD-002, and MSL Level 1 rating-allowing exposure to moisture-free environments and compatibility with standard 260 °C peak reflow profiles without preconditioning. The SMA6J28AHM3/61 is supplied in 7" tape-and-reel (61 code) for pick-and-place machines.
Is SMA6J28AHM3/61 halogen-free and RoHS-compliant?
Yes, SMA6J28AHM3/61 carries the "M3" suffix, indicating it is both halogen-free and RoHS-compliant per EU Directive 2011/65/EU and Vishay's material declaration (Doc. 99912). It also passes JESD201 Class 2 whisker testing, confirming long-term solder joint reliability. This makes SMA6J28AHM3/61 suitable for environmentally regulated end equipment including industrial controllers and telecom infrastructure.
What is the thermal resistance of SMA6J28AHM3/61?
The SMA6J28AHM3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on a PCB with 5.0 mm × 5.0 mm copper pads per terminal, and a junction-to-lead resistance (RθJL) of 25 °C/W. These values are measured per standard JEDEC test conditions and are essential for calculating safe power derating above 25 °C ambient temperature. The SMA6J28AHM3/61 must be applied within these thermal limits to maintain 150 °C maximum junction temperature.
How does SMA6J28AHM3/61 differ from SMA6J28A-E3/61?
SMA6J28AHM3/61 and SMA6J28A-E3/61 share identical electrical specifications (VWM = 28 V, VBR = 31.1–34.4 V, VC = 44.0 V), but differ in material composition: the "M3" suffix denotes halogen-free, RoHS-compliant construction with JESD201 Class 2 whisker resistance, while "E3" indicates RoHS-compliant with lead content under exemption 7a and no halogen-free guarantee. Both use the same SMA package and 61 reel packaging.
SMA6J28AHM3/61 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):
- 28V
- Voltage - Breakdown (Min):
- 31.1V
- Voltage - Clamping (Max) @ Ipp:
- 44V
- Current - Peak Pulse (10/1000µs):
- 13.6A
- 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)
SMA6J28AHM3/61 FAQ
1.How can I place an order for SMA6J28AHM3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6J28AHM3/61 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 SMA6J28AHM3/61 reliable?
The price and inventory of SMA6J28AHM3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA6J28AHM3/61 is usually 5 days.
3.What payment methods are accepted for SMA6J28AHM3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6J28AHM3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6J28AHM3/61?
SMA6J28AHM3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6J28AHM3/61 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 SMA6J28AHM3/61?
For technical support, including SMA6J28AHM3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6J28AHM3/61 requirements.
6.How does Aetrix verify that SMA6J28AHM3/61 is sourced from the original manufacturer or authorized distributors?
All SMA6J28AHM3/61 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 SMA6J28AHM3/61 meets industry standards.
7.What is the process for return or replacement of SMA6J28AHM3/61?
All SMA6J28AHM3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMA6J28AHM3/61, 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 SMA6J28AHM3/61 part is unused and in its original packaging.
Return procedure for SMA6J28AHM3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA6J28AHM3/61 Tags
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