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Vishay General Semiconductor - Diodes Division 5KASMC28AHM3_A/I
- Part No.:
- 5KASMC28AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
5KASMC28AHM3_A/I.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,240
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Product details
Overview
5KASMC28AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for high-energy surge protection in automotive and industrial power rails. It delivers 5000 W peak pulse power (10/1000 μs), clamps at 45.4 V under 110.1 A surge current, and operates up to 185 °C junction temperature. Used to protect MOSFETs and sensor signal lines against inductive switching transients.
For engineers reviewing the 5KASMC28AHM3_A/I datasheet, 5KASMC28AHM3_A/I pinout, 5KASMC28AHM3_A/I application, or 5KASMC28AHM3_A/I equivalent, key selection criteria include unidirectional polarity, SMC (DO-214AB) package compatibility, 28 V stand-off voltage, AEC-Q101 qualification, and 100 °C/W junction-to-ambient thermal resistance under standard mounting.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology optimized for high-temperature stability and low incremental surge resistance. Its 185 °C maximum junction temperature and MSL Level 1 rating support reflow soldering at 260 °C peak, meeting stringent automotive reliability requirements.
The device exhibits a typical breakdown voltage of 32.8 V at 1 mA test current, with ±10 % tolerance (31.1–34.4 V), and a temperature coefficient of +0.089 %/°C - enabling predictable clamping behavior across extended thermal ranges in engine control units and power converters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - Maximum continuous reverse operating voltage before leakage exceeds 2 μA; defines safe DC bias margin. |
| VBR (min/typ/max) | 31.1 / 32.8 / 34.4 V at 1 mA - Ensures reliable turn-on above system nominal voltage while avoiding false triggering. |
| VC @ IPPM | 45.4 V at 110.1 A - Clamping voltage during 5000 W surge; determines protected circuit's maximum stress level. |
| PPPM | 5000 W (10/1000 μs) - Peak surge energy handling capacity; supports ISO 7637-2 Pulse 1/2b/5a compliance testing. |
| TJ max | +185 °C - Enables placement near hot components (e.g., power MOSFETs, DC-DC inductors) without derating. |
| RθJA | 100 °C/W - Thermal resistance with minimum recommended pad layout; informs PCB copper area requirements for thermal management. |
| AEC-Q101 | Qualified - Validated for automotive electronics per stress test requirements including HTGB, HTRB, and TCT. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or low-impedance return path; forms clamping loop with cathode. |
| Cathode | High-side connection point | Connected to protected line (e.g., 24 V rail, sensor supply); absorbs positive-going transients. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Reduces surface leakage and improves long-term reliability under high-humidity, high-temperature conditions. |
| 10/1000 μs waveform rating | Validates robustness against slow-rising, high-energy surges common in automotive load-dump events. |
| MSL Level 1, 260 °C peak | Enables single-pass lead-free reflow assembly without popcorn cracking or delamination risk. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving protection margin for downstream ICs. |
| Halogen-free & RoHS-compliant | Meets global environmental compliance mandates for automotive and industrial end equipment. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply lines in engine control modules from ISO 7637-2 Pulse 5a load-dump transients up to 60 V. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed between battery rail and DC-DC input filter. Use Value: Limits transient voltage to ≤45.4 V, preventing overvoltage damage to buck controller ICs rated for 42 V absolute maximum. | Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loops) in factory automation sensors exposed to relay coil flyback. IC Role / Device Role / Timing Role: Fast-response shunt protector on signal line, grounded via low-inductance path. Use Value: Responds in <1 ps to clamp spikes before they reach precision DAC or op-amp inputs, preserving measurement integrity. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Shielding PoE-powered equipment front-end from lightning-induced surges on 48 V DC input. IC Role / Device Role / Timing Role: Primary surge suppression stage upstream of DC-DC converter and EMI filter. Use Value: Absorbs 5000 W pulses without degradation, maintaining >10⁵ surge cycles lifetime per IEC 61000-4-5. | Use Scenario: Suppressing commutation spikes on BLDC motor phase lines in smart home appliances. IC Role / Device Role / Timing Role: Parallel-connected TVS across motor winding terminals to clamp inductive kickback. Use Value: Withstands repeated 110 A surges at 185 °C ambient, eliminating need for external heatsinking in compact enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ28A | Lower PPPM (400 W), same VWM/VC, SMA package (smaller footprint, higher RθJA) | Not suitable for automotive load-dump; limited to low-energy consumer-level ESD/surge. | Select only for space-constrained non-automotive designs where 5000 W capability is unnecessary. |
| SMCJ28A | Same SMC package, identical VWM/VBR, but lower TJ max (175 °C) and no AEC-Q101 qualification | Lacks automotive qualification; requires additional validation for under-hood deployment. | Acceptable for industrial controls where AEC-Q101 is not mandated and 10 °C lower thermal margin is acceptable. |
Compared with SMAJ28A and SMCJ28A, the 5KASMC28AHM3_A/I provides superior surge robustness (5000 W vs. 400 W or 3000 W), guaranteed automotive qualification, and extended 185 °C operation - making it the only choice for AEC-Q101-compliant, high-reliability 24 V system protection.
Availability
5KASMC28AHM3_A/I is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom DC input surge suppression requiring stable component supply and full AEC-Q101 traceability.
Supply support for 5KASMC28AHM3_A/I 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 high-temperature performance.
The 5KASMC series was developed specifically for AEC-Q101-compliant transient protection in harsh automotive and industrial environments, targeting high-energy load-dump and inductive switching events.
FAQ
What is the maximum clamping voltage of the 5KASMC28AHM3_A/I under a 10/1000 μs surge?
The 5KASMC28AHM3_A/I has a maximum clamping voltage (VC) of 45.4 V when subjected to its rated peak pulse current of 110.1 A using the standardized 10/1000 μs waveform. This value is measured per Figure 1 in the Vishay datasheet 89432 and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The 5KASMC28AHM3_A/I maintains this clamping performance across its full operating temperature range.
Is the 5KASMC28AHM3_A/I qualified for automotive applications?
Yes, the 5KASMC28AHM3_A/I is AEC-Q101 qualified, as explicitly stated in the Vishay datasheet 89432. This qualification covers stress tests including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), temperature cycling (TCT), and mechanical shock - confirming suitability for under-hood and powertrain applications. The 5KASMC28AHM3_A/I also meets MSL Level 1 and JESD201 Class 2 whisker resistance requirements.
What does the "HM3_A/I" suffix indicate in 5KASMC28AHM3_A/I?
The "HM3" denotes the halogen-free, RoHS-compliant, AEC-Q101-qualified SMC package variant with matte tin-plated leads. "A" is the revision code; "I" specifies the packaging format: 13-inch diameter plastic tape and reel, with a base quantity of 3500 units. This distinguishes it from the "H" variant (7-inch reel, 850 units). The 5KASMC28AHM3_A/I is fully compatible with standard SMC pick-and-place and reflow processes.
How does the thermal performance of the 5KASMC28AHM3_A/I compare to standard SMC TVS diodes?
The 5KASMC28AHM3_A/I features a maximum junction temperature of +185 °C - 10 °C higher than conventional SMC TVS diodes like the SMCJ series (175 °C). Its typical junction-to-ambient thermal resistance is 100 °C/W with minimum recommended pads, matching industry-standard SMC layouts. This extended thermal capability allows the 5KASMC28AHM3_A/I to operate reliably in high-ambient environments such as engine compartments without derating.
Can the 5KASMC28AHM3_A/I be used in bidirectional configurations?
No, the 5KASMC28AHM3_A/I is unidirectional only, as confirmed in the Vishay datasheet features section and electrical characteristics table. It protects against positive-going transients on the cathode side relative to anode ground. For bidirectional protection (e.g., AC lines or data buses), two 5KASMC28AHM3_A/I devices must be connected in series opposition, or a dedicated bidirectional TVS such as the 5KASMC28CA should be selected instead.
5KASMC28AHM3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 28V
- Voltage - Breakdown (Min):
- 31.1V
- Voltage - Clamping (Max) @ Ipp:
- 45.4V
- Current - Peak Pulse (10/1000µs):
- 110.1A
- Power - Peak Pulse:
- 5000W (5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
5KASMC28AHM3_A/I FAQ
1.How can I place an order for 5KASMC28AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 5KASMC28AHM3_A/I 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 5KASMC28AHM3_A/I reliable?
The price and inventory of 5KASMC28AHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 5KASMC28AHM3_A/I is usually 5 days.
3.What payment methods are accepted for 5KASMC28AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 5KASMC28AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 5KASMC28AHM3_A/I?
5KASMC28AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 5KASMC28AHM3_A/I 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 5KASMC28AHM3_A/I?
For technical support, including 5KASMC28AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 5KASMC28AHM3_A/I requirements.
6.How does Aetrix verify that 5KASMC28AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All 5KASMC28AHM3_A/I 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 5KASMC28AHM3_A/I meets industry standards.
7.What is the process for return or replacement of 5KASMC28AHM3_A/I?
All 5KASMC28AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 5KASMC28AHM3_A/I, 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 5KASMC28AHM3_A/I part is unused and in its original packaging.
Return procedure for 5KASMC28AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
5KASMC28AHM3_A/I Tags
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