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Vishay General Semiconductor - Diodes Division 5KASMC40AHM3_A/I
- Part No.:
- 5KASMC40AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
5KASMC40AHM3_A/I.pdf
- Description:
- TVS DIODE 40VWM 64.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,467
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Product details
Overview
5KASMC40AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for high-energy surge protection in automotive and industrial power rails. It delivers 5000 W peak pulse power (10/1000 μs), clamps at 77.5 V under 64.5 A surge current, and operates up to 185 °C junction temperature. Its SMC (DO-214AB) package supports robust protection of 40 V nominal systems such as automotive body control modules and DC-DC converter inputs.
For engineers reviewing the 5KASMC40AHM3_A/I datasheet, 5KASMC40AHM3_A/I pinout, 5KASMC40AHM3_A/I application, or 5KASMC40AHM3_A/I equivalent, key selection criteria include clamping voltage (VC = 77.5 V), standoff voltage (VWM = 40 V), unidirectional polarity, AEC-Q101 qualification, and MSL Level 1 reflow compatibility at 260 °C.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to achieve low incremental surge resistance and fast response time-critical for suppressing fast-rising transients from inductive load switching. Its 185 °C maximum junction temperature and AEC-Q101 qualification confirm suitability for under-hood automotive environments where thermal stress and reliability are paramount.
The device exhibits a typical temperature coefficient of VBR (αT = 0.092 %/°C), enabling predictable breakdown voltage drift across temperature. With RθJA = 100 °C/W and RθJM = 20.8 °C/W, thermal performance depends strongly on PCB pad layout and heatsinking-especially when sustaining repetitive surges near its 6.5 W steady-state power limit.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse operating voltage before leakage exceeds 2 μA; defines system rail compatibility. |
| VBR (min) | 44.4 V - Minimum breakdown voltage at 1 mA test current; ensures reliable triggering above normal operating voltage. |
| VC @ IPPM | 77.5 V - Clamping voltage at 64.5 A peak pulse current; determines maximum voltage seen by protected IC/MOSFET. |
| PPPM (10/1000 μs) | 5000 W - Peak pulse power handling capability; enables suppression of high-energy transients like ISO 7637-2 Pulse 5a. |
| TJ max. | +185 °C - Maximum junction temperature; supports operation in engine compartment and industrial high-temp enclosures. |
| AEC-Q101 | Qualified - Validated for automotive electronic systems per stress test requirements including HTGB, HTRB, and TCT. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with cathode band marking; compatible with automated pick-and-place and reflow. |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, halogen-free and RoHS-compliant. Cathode identified by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-voltage return path; forms clamping loop with cathode during transient events. |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 40 V supply rail); conducts surge current to ground when V > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier structure reduces leakage drift and improves long-term stability at 185 °C. |
| Clamping performance | VC/VBR ratio = 1.74 - Low clamping overhead ensures protected devices remain within safe absolute maximum ratings. |
| Surge response speed | Sub-nanosecond turn-on - Limits voltage overshoot during fast transients (e.g., ESD, relay bounce). |
| Thermal robustness | RθJM = 20.8 °C/W - Enables effective heat transfer to PCB copper when mounted per recommended pad layout. |
| Manufacturing compliance | MSL Level 1, JESD201 Class 2 whisker test, halogen-free - Supports high-reliability automated assembly without moisture sensitivity concerns. |
Applications
| Automotive Body Control Module (BCM) | Industrial DC-DC Converter Input |
|---|---|
Use Scenario: Protects microcontroller I/O and power monitoring circuits from load dump and alternator ripple in 12 V/24 V vehicle electrical systems. IC Role / Device Role: Unidirectional TVS placed between battery rail and LDO input or MCU supply pin. Use Value: Clamps 77.5 V surges while maintaining 40 V system compatibility-prevents latch-up and gate oxide damage in downstream silicon. |
Use Scenario: Shields primary-side controller ICs and MOSFET gates from switching-induced transients in isolated flyback or forward converters. IC Role / Device Role: Parallel-connected TVS across bulk capacitor input to absorb reflected energy from transformer leakage inductance. Use Value: 5000 W peak power rating handles repetitive 10/1000 μs surges common in industrial power supplies without degradation. |
| Telecom Power Interface | Consumer Appliance Motor Drive |
Use Scenario: Safeguards PoE-powered equipment front-end circuitry against lightning-induced surges on Ethernet lines coupled via transformers. IC Role / Device Role: Secondary-side TVS on DC output of isolation transformer, referenced to local ground plane. Use Value: AEC-Q101 qualification ensures consistent parametric stability across temperature cycling-critical for field-deployed telecom gear. |
Use Scenario: Suppresses commutation spikes generated by brushed DC motors in washing machines, HVAC blowers, and power tools. IC Role / Device Role: Mounted across motor terminals or across H-bridge high-side FET source-drain to clamp inductive kickback. Use Value: 185 °C TJ max. withstands ambient temperatures near hot motors without derating-eliminates need for thermal derating margins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ40A | Lower PPPM (600 W), same VWM (40 V), SMB package (smaller footprint, higher RθJA) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a or high-current load dump. | Select only for space-constrained consumer designs where surge energy is below 100 mJ. |
| 5.0SMDJ40A | Same PPPM (5000 W), but DO-214AB package with higher IR leakage (50 μA vs. 2 μA at VWM) | Higher leakage may affect low-power sleep modes in always-on automotive modules. | Prefer 5KASMC40AHM3_A/I where low standby current and AEC-Q101 traceability are required. |
Compared with SMBJ40A and 5.0SMDJ40A, the 5KASMC40AHM3_A/I provides superior thermal robustness (185 °C TJ max.), lower leakage (2 μA), and tighter VBR tolerance (±5.5%), making it the preferred choice for automotive-grade 40 V rail protection where reliability and parametric consistency are non-negotiable.
Availability
5KASMC40AHM3_A/I is available at Aetrix Electronics and suitable for automotive body electronics, industrial power conversion, telecom infrastructure, and appliance motor control requiring stable component supply and full AEC-Q101 traceability.
Supply support for 5KASMC40AHM3_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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The 5KASMC series belongs to Vishay's PAR® family of high-power TVS diodes, engineered specifically for AEC-Q101-compliant surge protection in harsh-temperature automotive and industrial environments.
FAQ
What is the clamping voltage of the 5KASMC40AHM3_A/I under maximum surge current?
The 5KASMC40AHM3_A/I clamps at 77.5 V when subjected to its rated peak pulse current of 64.5 A (10/1000 μs waveform). This value is measured per Figure 1 in the official Vishay datasheet (Document Number: 89432) and defines the upper voltage limit imposed on protected circuitry during worst-case transient events.
Is the 5KASMC40AHM3_A/I qualified for automotive use?
Yes, the 5KASMC40AHM3_A/I is AEC-Q101 qualified, having passed stress tests including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling (TCT). Its 185 °C maximum junction temperature and MSL Level 1 rating further validate its suitability for under-hood automotive applications.
What does the "HM3_A/I" suffix indicate in 5KASMC40AHM3_A/I?
The "HM3" denotes Vishay's halogen-free, RoHS-compliant SMC package with JESD201 Class 2 whisker resistance; "A" is the revision code; "I" specifies 3500-unit quantity on 13-inch tape-and-reel packaging. This matches the ordering information table in the 5KASMC10A–43A datasheet (Rev. 19-Jan-2024).
How does the 5KASMC40AHM3_A/I compare to standard SMA/SMB TVS diodes in surge handling?
The 5KASMC40AHM3_A/I delivers 5000 W peak pulse power-over 8× higher than typical SMA (400 W) or SMB (600 W) TVS diodes. Its SMC package enables lower thermal resistance and higher surge current capacity (64.5 A vs. ≤10 A for SMBJ40A), making it appropriate for ISO 7637-2 Pulse 5a load dump protection.
Can the 5KASMC40AHM3_A/I be used in bidirectional configurations?
No, the 5KASMC40AHM3_A/I is unidirectional only, as explicitly stated in the Vishay datasheet features section. For bidirectional protection, engineers must select a dedicated bidirectional variant (e.g., 5KASMC40CA) or implement back-to-back unidirectional devices-neither of which applies to the 5KASMC40AHM3_A/I.
5KASMC40AHM3_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):
- 40V
- Voltage - Breakdown (Min):
- 44.4V
- Voltage - Clamping (Max) @ Ipp:
- 64.5V
- Current - Peak Pulse (10/1000µs):
- 77.5A
- 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)
5KASMC40AHM3_A/I FAQ
1.How can I place an order for 5KASMC40AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 5KASMC40AHM3_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 5KASMC40AHM3_A/I reliable?
The price and inventory of 5KASMC40AHM3_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 5KASMC40AHM3_A/I is usually 5 days.
3.What payment methods are accepted for 5KASMC40AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 5KASMC40AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 5KASMC40AHM3_A/I?
5KASMC40AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 5KASMC40AHM3_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 5KASMC40AHM3_A/I?
For technical support, including 5KASMC40AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 5KASMC40AHM3_A/I requirements.
6.How does Aetrix verify that 5KASMC40AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All 5KASMC40AHM3_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 5KASMC40AHM3_A/I meets industry standards.
7.What is the process for return or replacement of 5KASMC40AHM3_A/I?
All 5KASMC40AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 5KASMC40AHM3_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 5KASMC40AHM3_A/I part is unused and in its original packaging.
Return procedure for 5KASMC40AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
5KASMC40AHM3_A/I Tags
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