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Vishay General Semiconductor - Diodes Division 5KASMC26AHM3J/57
- Part No.:
- 5KASMC26AHM3J/57
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
5KASMC26AHM3J/57.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
5KASMC26AHM3J/57 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) package, rated for 26 V stand-off voltage, 28.9–31.9 V breakdown at 1 mA, 5000 W peak pulse power (10/1000 µs), 118.8 A peak surge current, and 42.1 V clamping voltage at IPPM. It delivers high-reliability overvoltage protection for automotive power rails and industrial sensor interfaces.
For engineers reviewing the 5KASMC26AHM3J/57 datasheet, 5KASMC26AHM3J/57 pinout, 5KASMC26AHM3J/57 application, or 5KASMC26AHM3J/57 equivalent, key selection criteria include its AEC-Q101 qualification, TJ = 185 °C maximum junction temperature, MSL Level 1 rating, uni-directional polarity, and 42.1 V clamping performance under 118.8 A surge.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to achieve low incremental surge resistance and fast response time (<1 ns), enabling effective suppression of inductive switching transients and ESD events. Its thermal design supports operation up to 185 °C junction temperature with RθJA = 100 °C/W (on minimum pad layout) and RθJM = 20.8 °C/W (on infinite heatsink).
The device is optimized for uni-directional clamping only, with strict compliance to J-STD-020 (MSL Level 1, 260 °C peak reflow) and JESD 201 Class 2 whisker resistance. It meets ANSI/IEEE C62.35 surge waveform standards and is halogen-free, RoHS-compliant, and AEC-Q101 qualified.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC bias margin for protected circuitry. |
| VBR (min/max) | 28.9 V / 31.9 V at IT = 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on during overvoltage events. |
| PPPM | 5000 W (10/1000 µs) - Peak surge energy handling capacity; protects against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges. |
| VC @ IPPM | 42.1 V - Clamped voltage at 118.8 A peak current; determines maximum stress imposed on downstream ICs or MOSFETs. |
| TJ max | +185 °C - Enables use in under-hood automotive environments and high-ambient industrial enclosures without derating. |
| Polarity | Uni-directional - Requires correct orientation relative to DC rail polarity; cathode band denotes terminal 1 (anode = terminal 2). |
| Package | DO-214AB (SMCJ) - Standardized SMT outline with 7.75 mm × 6.22 mm footprint; compatible with automated placement and reflow. |
Pinout & Package
Package: DO-214AB (SMCJ), surface-mount, bi-terminal, cathode-indicated by molded band. Dimensions: 7.75 mm × 6.22 mm × 2.62 mm (L × W × H); terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 (Cathode end, marked) | Clamping output node | Connected to protected line (e.g., 24 V rail); conducts surge current to ground when VIN exceeds VBR. |
| Terminal 2 (Anode) | Reference/ground return | Typically tied to system ground plane; completes clamping path; must maintain low-impedance connection for effective surge diversion. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated reliability for automotive electronics including engine control units, body modules, and ADAS sensors. |
| 185 °C junction temperature rating | Enables deployment in high-temperature zones (e.g., near power converters or under-hood ECUs) without thermal derating. |
| 5000 W peak pulse power (10/1000 µs) | Withstands severe load-dump and inductive kick events common in 24 V vehicle systems and industrial motor drives. |
| Low clamping ratio (VC/VBR ≈ 1.32) | Minimizes overvoltage overshoot during surge, reducing risk of latch-up or gate oxide damage in protected MOSFETs and ICs. |
| MSL Level 1, 260 °C peak reflow | Eliminates moisture sensitivity concerns; supports standard lead-free reflow profiles without baking or special handling. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply lines in engine control modules against ISO 7637-2 load dump pulses and alternator transients. IC Role / Device Role / Timing Role: Uni-directional clamping diode placed between battery rail and DC-DC converter input. Use Value: Limits transient voltage to ≤42.1 V, preventing damage to downstream regulators and microcontrollers rated for 36 V absolute maximum. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors connected to PLC I/O modules exposed to field wiring surges. IC Role / Device Role / Timing Role: Standoff-clamp TVS on 4–20 mA loop or 0–10 V signal line, located at connector entry point. Use Value: Clamps induced lightning-induced surges to <45 V while maintaining <2 µA leakage at 26 V, preserving signal accuracy. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Shielding PoE-powered network switches and base stations from AC-line coupled surges entering via 48 V DC input. IC Role / Device Role / Timing Role: Primary overvoltage clamp on bulk DC input stage, upstream of primary FETs and controllers. Use Value: Absorbs 5000 W surges without degradation, verified across 1000+ cycles per AEC-Q101 stress test protocols. |
Use Scenario: Suppressing back-EMF spikes from brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Flyback suppression diode across motor terminals, oriented to clamp negative-going transients. Use Value: Responds in <1 ns to 100 V/µs dV/dt events, limiting spike amplitude to 42.1 V and protecting MCU GPIOs and driver ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26A-E3/57 | Same DO-214AC (SMA) package but lower PPPM (400 W); VC = 42.1 V at 9.2 A (not 118.8 A). | Limited to low-energy surges (e.g., ESD-only); unsuitable for load dump or IEC 61000-4-5 testing. | Select only for space-constrained consumer designs where surge energy is <50 mJ. |
| SMCJ26AHE3/57 | Same DO-214AB package and 5000 W rating, but non-AEC-Q101; VBR min = 28.9 V, VC = 42.1 V - identical clamping behavior. | Acceptable for industrial/commercial use but not certified for automotive production programs requiring AEC-Q101 traceability. | Choose when automotive qualification is not required and cost optimization is prioritized. |
Compared with SMAJ26A-E3/57 and SMCJ26AHE3/57, the 5KASMC26AHM3J/57 uniquely combines AEC-Q101 qualification, 5000 W surge capability, and DO-214AB packaging-making it the only option among the three validated for automotive-grade 24 V system protection without design compromise.
Availability
5KASMC26AHM3J/57 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 long-term lifecycle support.
Supply support for 5KASMC26AHM3J/57 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, high-temperature operation, and automotive qualification.
The 5KASMCxxA family was engineered specifically for high-energy transient suppression in harsh-environment applications-including automotive power distribution, industrial automation, and infrastructure equipment-where AEC-Q101 compliance and 185 °C operation are mandatory.
FAQ
What is the clamping voltage of the 5KASMC26AHM3J/57 under full-rated surge current?
The 5KASMC26AHM3J/57 has a maximum clamping voltage (VC) of 42.1 V when subjected to its rated peak pulse current of 118.8 A (10/1000 µs waveform). This value is measured per ANSI/IEEE C62.35 and confirmed in the Vishay datasheet revision 18-Apr-16, page 2. The 5KASMC26AHM3J/57 maintains this clamping performance across its full operating temperature range up to +185 °C junction temperature.
Is the 5KASMC26AHM3J/57 suitable for automotive applications?
Yes, the 5KASMC26AHM3J/57 is AEC-Q101 qualified and rated for TJ = 185 °C, making it suitable for under-hood and chassis-mounted automotive electronics. It meets MSL Level 1 reflow requirements and is halogen-free and RoHS-compliant. The 5KASMC26AHM3J/57 is explicitly listed in Vishay's automotive-grade TVS portfolio for 24 V system protection, including engine control, body electronics, and ADAS sensor interfaces.
What does the "HM3/57" suffix indicate in 5KASMC26AHM3J/57?
The "HM3" suffix denotes Vishay's halogen-free, RoHS-compliant, AEC-Q101-qualified construction with matte tin-plated leads and JESD 201 Class 2 whisker resistance. The "/57" indicates packaging in 7-inch plastic tape and reel, with 850 units per reel. The "J" in the middle is a date/batch code per Vishay's internal marking convention-not a functional variant identifier. The 5KASMC26AHM3J/57 is functionally identical to 5KASMC26AHM3/57.
How does the 5KASMC26AHM3J/57 compare to bidirectional TVS diodes?
The 5KASMC26AHM3J/57 is unidirectional only and must be installed with correct polarity-cathode toward the protected line. Unlike bidirectional devices, it provides no protection against positive-going transients on grounded lines. However, it offers superior leakage performance (<2 µA at 26 V) and tighter VBR tolerance versus bidirectional equivalents. For 24 V DC systems, the 5KASMC26AHM3J/57 is preferred where polarity is fixed and low leakage is critical.
What is the thermal resistance of the 5KASMC26AHM3J/57 in standard PCB layout?
The 5KASMC26AHM3J/57 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on Vishay's minimum recommended pad layout (page 4 of datasheet 89432). With an infinite heatsink, RθJM drops to 20.8 °C/W. These values directly inform power derating above 25 °C ambient-e.g., at 100 °C ambient, the 5KASMC26AHM3J/57 must be limited to ~3.3 W continuous dissipation to stay within its 185 °C TJ limit.
5KASMC26AHM3J/57 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 26V
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 42.1V
- Current - Peak Pulse (10/1000µs):
- 118.8A
- 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)
5KASMC26AHM3J/57 FAQ
1.How can I place an order for 5KASMC26AHM3J/57 through Aetrix?
Please submit a Request for Quotation (RFQ) for 5KASMC26AHM3J/57 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 5KASMC26AHM3J/57 reliable?
The price and inventory of 5KASMC26AHM3J/57 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 5KASMC26AHM3J/57 is usually 5 days.
3.What payment methods are accepted for 5KASMC26AHM3J/57?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 5KASMC26AHM3J/57 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 5KASMC26AHM3J/57?
5KASMC26AHM3J/57 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 5KASMC26AHM3J/57 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 5KASMC26AHM3J/57?
For technical support, including 5KASMC26AHM3J/57 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 5KASMC26AHM3J/57 requirements.
6.How does Aetrix verify that 5KASMC26AHM3J/57 is sourced from the original manufacturer or authorized distributors?
All 5KASMC26AHM3J/57 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 5KASMC26AHM3J/57 meets industry standards.
7.What is the process for return or replacement of 5KASMC26AHM3J/57?
All 5KASMC26AHM3J/57 units undergo pre-shipment inspection (PSI). If there is an issue with 5KASMC26AHM3J/57, 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 5KASMC26AHM3J/57 part is unused and in its original packaging.
Return procedure for 5KASMC26AHM3J/57:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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