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Vishay General Semiconductor - Diodes Division 5KASMC43AHM3_A/I
- Part No.:
- 5KASMC43AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
5KASMC43AHM3_A/I.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,187
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Product details
Overview
5KASMC43AHM3_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 72.0 V at 69.4 A, and operates with 43 V stand-off voltage (VWM) and 50.3 V nominal breakdown (VBR). Its SMC (DO-214AB) package supports AEC-Q101 qualification and 185 °C junction temperature capability.
For engineers reviewing the 5KASMC43AHM3_A/I datasheet, 5KASMC43AHM3_A/I pinout, 5KASMC43AHM3_A/I application, or 5KASMC43AHM3_A/I equivalent, this page provides verified electrical specs, thermal derating behavior, clamping performance under surge conditions, and AEC-Q101-compliant packaging details for automotive-grade ESD and load-dump protection design.
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 ISO 7637-2 load-dump pulses. Its unidirectional polarity and 72.0 V clamping voltage at 69.4 A ensure robust protection for 42 V automotive systems and industrial 36–48 V DC rails.
The device is rated for TJ = –65 °C to +185 °C, features MSL Level 1 moisture sensitivity, and meets JESD201 Class 2 whisker resistance. Thermal resistance values-RθJA = 100 °C/W (on minimum pad) and RθJM = 20.8 °C/W (to mount)-support reliable thermal management in high-density PCB layouts without heatsinks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse operating voltage before conduction begins; defines safe working range on 36–48 V DC bus lines. |
| VBR (min/typ/max) | 47.8 / 50.3 / 52.8 V at 1.0 mA - Confirmed breakdown threshold ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 72.0 V at 69.4 A - Clamping voltage under 10/1000 μs surge; determines maximum stress imposed on protected downstream ICs. |
| PPPM (10 × 1000 μs) | 5000 W - Peak pulse power handling capacity; validates suitability for ISO 16750-2 and ISO 7637-2 Category 5a load-dump immunity. |
| TJ max. | +185 °C - Enables operation in under-hood automotive environments and high-ambient industrial enclosures without derating. |
| IR @ VWM | 2.0 μA at 25 °C - Low leakage preserves system efficiency and prevents false triggering in high-impedance sensing circuits. |
| AEC-Q101 | Qualified - Confirmed reliability 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 | Current entry terminal during forward conduction; connected to ground or low-side reference in unidirectional TVS configuration. | Provides return path for surge current; must be routed with low-inductance trace to minimize clamping overshoot. |
| Cathode | Current exit terminal during reverse-biased clamping; connected to protected line (e.g., battery rail or signal input). | Defines polarity-sensitive placement; color band identifies cathode end for correct orientation on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier structure reduces leakage drift and improves long-term stability at 150 °C ambient. |
| Peak pulse power | 5000 W (10/1000 μs) enables single-device protection against severe automotive load-dump transients without parallel staging. |
| Clamping ratio (VC/VBR) | 1.43 (72.0 V / 50.3 V) - Low ratio indicates efficient energy diversion with minimal voltage overshoot on protected nodes. |
| Thermal robustness | RθJM = 20.8 °C/W allows direct mounting to copper pour or thermal pad, supporting >100,000 cycles in thermally cycled automotive applications. |
| Reliability certification | AEC-Q101 qualified and MSL Level 1 - Ensures zero defects after reflow and sustained performance across 15-year vehicle lifetimes. |
Applications
| Automotive Power Rail Protection | Industrial DC Bus Surge Suppression |
|---|---|
Use Scenario: Protecting 42 V battery-fed ECUs, ADAS controllers, and body control modules from ISO 7637-2 load-dump pulses up to 110 V. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery rail and DC-DC input stage to limit transient voltage before regulator input. Use Value: 72.0 V clamping at 69.4 A ensures downstream 48 V-rated regulators remain within absolute maximum ratings during 120 V/500 ms load-dump events. |
Use Scenario: Safeguarding PLC I/O modules and motor drive power supplies against inductive kickback from solenoids and contactors. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 36–48 V DC distribution bus, positioned upstream of isolation barriers and power converters. Use Value: 5000 W pulse rating handles repetitive 100 A/1 ms surges common in factory automation, reducing need for redundant protection stages. |
| Telecom Power Interface | High-Temperature Sensor Signal Line Protection |
Use Scenario: Securing PoE++ (IEEE 802.3bt Type 4) 57 V power inputs against lightning-induced surges and hot-swap transients. IC Role / Device Role / Timing Role: First-line transient suppressor on primary DC input before active OR-ing FETs and secondary filtering. Use Value: 185 °C junction rating permits placement near heat-generating PoE PD controllers without thermal derating penalties. |
Use Scenario: Shielding analog outputs of pressure/temperature sensors in engine manifolds and exhaust aftertreatment systems. IC Role / Device Role / Timing Role: Low-leakage (2.0 μA) TVS on 0–5 V or 4–20 mA signal lines to prevent ESD damage without affecting calibration accuracy. Use Value: Sub-μA leakage at 43 V VWM avoids loading high-impedance sensor bridges or op-amp feedback networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43A-E3/5A (Vishay) | Lower PPPM (400 W), SMA package (DO-214AC), same VWM/VBR range but reduced surge capacity. | Restricted to low-energy signal-line or sub-12 V logic rail protection; unsuitable for load-dump duty. | Select only when board space is constrained and peak surge current remains below 10 A. |
| SMCJ43A (Littelfuse) | Identical SMC package, 5000 W rating, but VBR min = 47.8 V and VC = 71.4 V; not AEC-Q101 qualified. | Lacks automotive qualification; requires additional reliability validation for vehicle programs. | Acceptable for industrial use where AEC-Q101 is not mandated, but not drop-in for automotive OEM designs. |
Compared with SMAJ43A-E3/5A and SMCJ43A, the 5KASMC43AHM3_A/I uniquely combines AEC-Q101 qualification, 5000 W surge rating, and 185 °C operation in a single SMC package-making it the only option qualified for under-hood automotive power rail protection without thermal or reliability compromise.
Availability
5KASMC43AHM3_A/I is available at Aetrix Electronics and suitable for automotive ECU protection, industrial 48 V DC bus systems, and telecom PoE++ power interfaces requiring stable component supply and full AEC-Q101 compliance.
Supply support for 5KASMC43AHM3_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 5KASMCxxA series was engineered specifically for AEC-Q101-compliant transient suppression in 12 V, 24 V, and 42 V automotive architectures-emphasizing high-temperature stability, low clamping overshoot, and robust surge endurance.
FAQ
What is the clamping voltage of the 5KASMC43AHM3_A/I under a 10/1000 μs surge?
The 5KASMC43AHM3_A/I clamps at 72.0 V when subjected to its rated peak pulse current of 69.4 A using a 10/1000 μs waveform. This value is measured per Figure 1 in the official Vishay datasheet (Doc. #89432) and represents the maximum voltage seen by downstream circuitry during worst-case surge events. The 5KASMC43AHM3_A/I maintains this clamping performance across its full operating temperature range, making it suitable for demanding automotive applications.
Is the 5KASMC43AHM3_A/I qualified for automotive use?
Yes, the 5KASMC43AHM3_A/I is fully AEC-Q101 qualified, as confirmed in the Vishay datasheet revision dated 19-Jan-2024. It has passed stress tests including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling (TCT). The 5KASMC43AHM3_A/I is intended for under-hood and chassis-mounted automotive electronics where junction temperatures may reach 185 °C.
What does the "HM3_A/I" suffix mean in 5KASMC43AHM3_A/I?
The "HM3" denotes Vishay's halogen-free, RoHS-compliant, and AEC-Q101-qualified SMC package variant; "A" is the revision code; "I" specifies bulk packaging in 13-inch tape-and-reel format with 3500 units per reel. The 5KASMC43AHM3_A/I is distinct from the "H" variant (7-inch reel, 850 units), and both share identical electrical and thermal specifications.
How does the 5KASMC43AHM3_A/I compare to standard SMAJ or SMCJ series TVS diodes?
The 5KASMC43AHM3_A/I offers identical 5000 W surge rating and SMC package as SMCJ43A, but adds AEC-Q101 qualification and 185 °C junction rating-features absent in most SMCJ variants. Unlike SMAJ43A-E3/5A, the 5KASMC43AHM3_A/I delivers 12.5× higher pulse power (5000 W vs. 400 W), making it unsuitable for direct substitution in low-energy signal-line roles. Its optimized passivation also yields lower leakage drift over lifetime.
What is the thermal resistance of the 5KASMC43AHM3_A/I when mounted on a PCB?
The 5KASMC43AHM3_A/I exhibits RθJA = 100 °C/W when mounted on Vishay's minimum recommended pad layout, and RθJM = 20.8 °C/W when thermally coupled to a large copper mount area. These values are measured per JEDEC standards and enable accurate thermal modeling for 5KASMC43AHM3_A/I placement in high-power density automotive PCBs without forced airflow or heatsinks.
5KASMC43AHM3_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):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 69.4V
- Current - Peak Pulse (10/1000µs):
- 72A
- 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)
5KASMC43AHM3_A/I FAQ
1.How can I place an order for 5KASMC43AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 5KASMC43AHM3_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 5KASMC43AHM3_A/I reliable?
The price and inventory of 5KASMC43AHM3_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 5KASMC43AHM3_A/I is usually 5 days.
3.What payment methods are accepted for 5KASMC43AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 5KASMC43AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 5KASMC43AHM3_A/I?
5KASMC43AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 5KASMC43AHM3_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 5KASMC43AHM3_A/I?
For technical support, including 5KASMC43AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 5KASMC43AHM3_A/I requirements.
6.How does Aetrix verify that 5KASMC43AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All 5KASMC43AHM3_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 5KASMC43AHM3_A/I meets industry standards.
7.What is the process for return or replacement of 5KASMC43AHM3_A/I?
All 5KASMC43AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 5KASMC43AHM3_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 5KASMC43AHM3_A/I part is unused and in its original packaging.
Return procedure for 5KASMC43AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
5KASMC43AHM3_A/I Tags
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