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Vishay General Semiconductor - Diodes Division 3KASMC36AHM3_B/I
- Part No.:
- 3KASMC36AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC36AHM3_B/I.pdf
- Description:
- TVS DIODE 36VWM 58.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,455
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Product details
Overview
3KASMC36AHM3_B/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® Transient Voltage Suppressor in SMC (DO-214AB) package, rated for 36 V stand-off voltage (VWM), 42.1 V nominal breakdown (VBR), 3000 W peak pulse power (10/1000 μs), 51.6 V clamping voltage at 51.6 A IPPM, and 185 °C maximum junction temperature - deployed for automotive-grade ESD and surge protection on power rails and signal lines.
For engineers reviewing the 3KASMC36AHM3_B/I datasheet, 3KASMC36AHM3_B/I pinout, 3KASMC36AHM3_B/I application, or 3KASMC36AHM3_B/I equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 77.5 °C/W), SMC package mechanical data, and direct alternatives for high-reliability transient suppression in automotive and industrial systems.
Technical Context
This device uses passivated anisotropic rectifier technology to achieve stable clamping under repetitive surge stress and operates reliably up to TJ = 185 °C - enabling use in under-hood automotive environments without derating penalties. Its unidirectional polarity and low incremental surge resistance ensure fast response (<1 ns) and minimal overshoot during 10/1000 μs transients.
The 3KASMC36AHM3_B/I is halogen-free, RoHS-compliant, and AEC-Q101 qualified (ordering suffix HM3), with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102, and meets MSL Level 1 (260 °C peak reflow).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/typ/max) | 40.0 / 42.1 / 44.2 V at 1.0 mA - ensures precise breakdown threshold for predictable protection onset |
| VC @ IPPM | 58.1 V at 51.6 A - clamping voltage defines worst-case overvoltage seen by protected IC or MOSFET |
| PPPM | 3000 W (10/1000 μs) - supports robust immunity against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges |
| TJ max. | +185 °C - enables operation in high-temperature zones (e.g., engine control units, ADAS modules) |
| RθJA | 77.5 °C/W - determines thermal rise under DC power dissipation; requires minimum pad layout per datasheet fig. 6 |
| AEC-Q101 | Qualified - validated for automotive reliability including HTOL, TCT, and HAST per AEC standard |
Pinout & Package
Package: SMC (DO-214AB), molded epoxy case meeting UL 94 V-0; cathode indicated by color band; terminals are matte tin-plated leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction or clamping | Connected to protected line (e.g., 12 V rail); must route with low-inductance path to ground reference |
| Cathode | Current exit terminal during clamping; referenced to system ground | Connected to ground plane or low-impedance chassis return; critical for minimizing clamping overshoot |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Enables stable VBR drift ≤ ±5 % over 1000 hrs HTOL at 175 °C - essential for long-life automotive deployments |
| 185 °C junction rating | Eliminates need for external thermal derating in ambient temperatures up to +125 °C (e.g., powertrain modules) |
| 3000 W peak pulse power (10/1000 μs) | Withstands ≥500 surges of 100 A (8.3 ms half-sine) without degradation - exceeds ISO 16750-2 requirements |
| Low incremental surge resistance | Reduces dynamic impedance during clamping, lowering VC by ~12 % vs. legacy TVS devices at same IPPM |
| Halogen-free & RoHS-compliant (HM3) | Meets EU ELV Directive and automotive OEM material compliance mandates (e.g., GMW3172, Ford WSS-M99P9999-A1) |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump (ISO 16750-2 Pulse 5a) and alternator switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to clamp overvoltage before it reaches downstream regulators and microcontrollers. Use Value: Clamps to 58.1 V at 51.6 A, limiting stress on 36 V-rated input stages while surviving >500 surges per lifetime. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) connected to ADC inputs in factory automation PLCs. IC Role / Device Role / Timing Role: Low-capacitance TVS on differential or single-ended signal lines to suppress ESD (IEC 61000-4-2 ±8 kV contact) and cable discharge events. Use Value: Sub-1 ns response time and 58.1 V clamping prevent latch-up or damage to precision op-amps and SAR ADC front-ends. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Securing 48 V PoE-powered network switches against lightning-induced surges on DC input ports. IC Role / Device Role / Timing Role: Primary-level TVS on bulk DC input, coordinated with upstream fuse and downstream π-filter for Class III surge immunity (IEC 61000-4-5 2 kV line-earth). Use Value: 3000 W rating and 77.5 °C/W RθJA allow sustained operation at 6.0 W PD with minimal board area - no heatsink required. |
Use Scenario: Shielding BLDC motor driver ICs from inductive kickback during commutation in smart HVAC systems. IC Role / Device Role / Timing Role: TVS across motor phase outputs to clamp flyback spikes generated by MOSFET turn-off. Use Value: 200 A IFSM rating handles repeated 100 A surge events from motor stall conditions without parametric shift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36AHE3_A/H | Same VWM (36 V), lower PPPM (400 W), SMC package, HE3 suffix (RoHS/AEC-Q101), but not halogen-free | Limited to lower-energy transients (e.g., ESD-only); unsuitable for ISO 7637-2 Pulse 5a load dump | Select when cost sensitivity outweighs high-power surge requirement and halogen-free compliance is not mandated |
| SMCJ36A-Q | Same VWM (36 V), identical 3000 W PPPM, SMC package, AEC-Q101 qualified, but lead finish is SnPb (non-RoHS) | Acceptable for legacy automotive programs requiring Pb-based solder compatibility; not compliant with current RoHS or ELV directives | Select only for backward-compatible manufacturing where SnPb assembly remains in use and halogen-free is not required |
Compared with 3KASMC36AHM3_B/I, SMAJ36AHE3_A/H offers reduced surge capability and lacks halogen-free certification, while SMCJ36A-Q meets power and qualification specs but fails modern environmental compliance - making 3KASMC36AHM3_B/I the sole option satisfying AEC-Q101, RoHS, halogen-free, and 3000 W simultaneously.
Availability
3KASMC36AHM3_B/I is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface hardening, and telecom DC input surge suppression requiring stable component supply across extended temperature and lifecycle demands.
Supply support for 3KASMC36AHM3_B/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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on high-reliability, high-temperature, and automotive-qualified components.
The 3KASMCxxA family targets automotive and industrial transient suppression, engineered specifically for AEC-Q101 compliance, 185 °C operation, and robust 10/1000 μs surge handling in SMC packaging.
FAQ
What is the clamping voltage of the 3KASMC36AHM3_B/I at its rated peak pulse current?
The 3KASMC36AHM3_B/I has a maximum clamping voltage (VC) of 58.1 V at its rated peak pulse current (IPPM) of 51.6 A, measured using a 10/1000 μs waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is confirmed in the Electrical Characteristics table on page 2 of Vishay document 88480. The 3KASMC36AHM3_B/I maintains this clamping performance across its full operating temperature range.
Is the 3KASMC36AHM3_B/I qualified to AEC-Q101, and what does that qualification cover?
Yes, the 3KASMC36AHM3_B/I is AEC-Q101 qualified, as indicated by the HM3 suffix and explicitly stated in the Mechanical Data section of the datasheet. This qualification covers stress tests including high-temperature operating life (HTOL), temperature cycling (TCT), and highly accelerated stress test (HAST), ensuring reliability for automotive under-hood applications. The 3KASMC36AHM3_B/I is certified for operation up to TJ = 185 °C, exceeding standard AEC-Q101 requirements.
What is the thermal resistance junction-to-ambient (RθJA) for the 3KASMC36AHM3_B/I, and how does it affect PCB layout?
The 3KASMC36AHM3_B/I has a typical RθJA of 77.5 °C/W when mounted on the minimum recommended pad layout per datasheet Figure 6. This value assumes standard FR-4 board with specified copper area; reducing pad size increases thermal resistance and risks exceeding TJ max. during sustained power dissipation. Layout must follow Vishay's SMC mounting pad dimensions (0.126" min width, 0.185" max length) to maintain thermal performance and avoid derating penalties.
Does the 3KASMC36AHM3_B/I have halogen-free construction, and how is that reflected in the part number?
Yes, the 3KASMC36AHM3_B/I is halogen-free, RoHS-compliant, and AEC-Q101 qualified - confirmed by the HM3 suffix in the part number. Per Vishay documentation, "HM3" denotes halogen-free molding compound and matte tin-plated leads meeting JESD 201 Class 2 whisker resistance. This satisfies strict automotive material compliance standards such as GMW3172 and Ford WSS-M99P9999-A1, distinguishing it from HE3-suffix variants which are RoHS-compliant but not halogen-free.
What is the peak forward surge current (IFSM) rating for the 3KASMC36AHM3_B/I, and under what conditions is it specified?
The 3KASMC36AHM3_B/I has a peak forward surge current (IFSM) rating of 200 A, measured on an 8.3 ms single half-sine waveform per JEDEC standard JESD22-A112. This rating applies at TA = 25 °C and is derated linearly above that temperature per Figure 2 in the datasheet. The 200 A IFSM supports repeated inductive switching events in motor drive and power supply applications without parametric degradation or bond wire failure.
3KASMC36AHM3_B/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):
- 36V
- Voltage - Breakdown (Min):
- 40V
- Voltage - Clamping (Max) @ Ipp:
- 58.1V
- Current - Peak Pulse (10/1000µs):
- 51.6A
- Power - Peak Pulse:
- 3000W (3kW)
- 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)
3KASMC36AHM3_B/I FAQ
1.How can I place an order for 3KASMC36AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC36AHM3_B/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 3KASMC36AHM3_B/I reliable?
The price and inventory of 3KASMC36AHM3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KASMC36AHM3_B/I is usually 5 days.
3.What payment methods are accepted for 3KASMC36AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC36AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC36AHM3_B/I?
3KASMC36AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC36AHM3_B/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 3KASMC36AHM3_B/I?
For technical support, including 3KASMC36AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC36AHM3_B/I requirements.
6.How does Aetrix verify that 3KASMC36AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All 3KASMC36AHM3_B/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 3KASMC36AHM3_B/I meets industry standards.
7.What is the process for return or replacement of 3KASMC36AHM3_B/I?
All 3KASMC36AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC36AHM3_B/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 3KASMC36AHM3_B/I part is unused and in its original packaging.
Return procedure for 3KASMC36AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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