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Vishay General Semiconductor - Diodes Division 3KASMC30AHM3_B/I
- Part No.:
- 3KASMC30AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC30AHM3_B/I.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,839
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Product details
Overview
3KASMC30AHM3_B/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor in SMC (DO-214AB) package, rated for 30 V stand-off voltage, 33.3–36.8 V breakdown at 1 mA, 3000 W peak pulse power (10/1000 µs), 62.0 A peak pulse current, and 48.4 V clamping voltage at IPPM - deployed for automotive power line and sensor interface protection.
For engineers reviewing the 3KASMC30AHM3_B/I datasheet, 3KASMC30AHM3_B/I pinout, 3KASMC30AHM3_B/I application, or 3KASMC30AHM3_B/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, TJ = 185 °C operation, MSL Level 1 rating, and halogen-free RoHS compliance per HM3 suffix.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to deliver stable clamping under high-temperature stress (up to 185 °C junction), with low incremental surge resistance and fast response time critical for suppressing inductive switching transients. Its 10/1000 µs waveform capability and 48.4 V clamping at 62.0 A ensure robust protection of downstream MOSFETs and ICs.
The device operates exclusively in unidirectional mode, features a cathode band marking, and is qualified to AEC-Q101 - confirming suitability for automotive power electronics where reliability under thermal cycling and surge stress is mandatory.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VBR (min/typ/max) | 33.3 / 35.1 / 36.8 V at 1 mA - defines precise breakdown threshold for predictable clamping onset |
| VC @ IPPM | 48.4 V - clamping voltage during 62.0 A 10/1000 µs surge, limiting stress on protected circuitry |
| PPPM | 3000 W - peak transient energy absorption capacity under standardized surge waveform |
| TJ max. | +185 °C - enables operation in under-hood automotive environments without derating |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 7.11 mm x 6.60 mm footprint and 3.20 mm height |
| Polarity | Unidirectional - blocks reverse conduction until breakdown, suitable for DC-biased lines |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case meeting UL 94 V-0 flammability rating; matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; cathode denoted by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal under forward bias | Connected to lower-potential side of protected line; conducts during clamping when cathode is at higher potential |
| Cathode | Current exit terminal under forward bias; marked with band | Connected to higher-potential side (e.g., supply rail); defines polarity and clamping direction |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier process ensures stable VBR over temperature and lifetime |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance |
| Halogen-free & RoHS | HM3 suffix confirms compliance with environmental standards without compromising surge performance |
| MSL Level 1 | Rated for reflow up to 260 °C peak, enabling compatibility with standard SMT assembly processes |
| Low RSURGE | Minimizes voltage overshoot during fast transients, improving protection margin for sensitive loads |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp surges above 30 V. Use Value: 3000 W peak power and 48.4 V clamping limit voltage stress on 36 V-rated regulators and microcontrollers. | Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) connected to ADC inputs. IC Role / Device Role / Timing Role: Low-capacitance TVS on signal line to absorb ESD and cable discharge events. Use Value: Fast response and 1 µA leakage at 30 V preserve signal integrity and measurement accuracy. |
| Motor Drive Gate Protection | Telecom DC Power Input |
Use Scenario: Shielding high-side MOSFET gate drivers from inductive kickback during PWM switching. IC Role / Device Role / Timing Role: TVS across gate-source terminals to prevent VGS overstress beyond ±20 V rating. Use Value: 62.0 A peak pulse current capacity handles repetitive 10/1000 µs spikes without degradation. | Use Scenario: Front-end surge suppression on 48 V telecom power supplies exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary clamping device on input bus before DC/DC converter stage. Use Value: 185 °C junction rating supports operation in sealed, high-ambient telecom cabinets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30AHE3_A/H | Same SMC package, 30 V VWM, but lower PPPM (400 W) and higher VC (48.4 V same, but at only 10.6 A) | Not AEC-Q101 qualified; intended for commercial/industrial use only | Select when automotive qualification is not required and cost sensitivity outweighs surge margin |
| SMCJ30AHE3_A/H | Same SMC package, 30 V VWM, 1500 W PPPM (half of 3KASMC30AHM3_B/I), 48.4 V VC at 31.0 A | AEC-Q101 qualified but lower surge rating; thermal resistance higher (RθJA = 83 °C/W vs. 77.5 °C/W) | Choose when board space is constrained and 1500 W surge level suffices for system-level testing |
Compared with SMAJ30AHE3_A/H and SMCJ30AHE3_A/H, the 3KASMC30AHM3_B/I delivers double the surge power handling of the latter and adds AEC-Q101 + halogen-free compliance absent in the former - making it the sole option meeting full automotive production requirements at 3000 W.
Availability
3KASMC30AHM3_B/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, motor drive subsystems, and telecom power input stages requiring stable component supply with guaranteed long-term availability.
Supply support for 3KASMC30AHM3_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 global manufacturing and quality systems certified to IATF 16949.
The 3KASMCx series was developed specifically for high-reliability automotive and industrial applications demanding extended temperature operation, AEC-Q101 validation, and robust 10/1000 µs surge immunity - targeting power rail and signal line protection where legacy TVS devices fail under thermal stress.
FAQ
What is the clamping voltage of the 3KASMC30AHM3_B/I at its rated peak pulse current?
The 3KASMC30AHM3_B/I has a maximum clamping voltage (VC) of 48.4 V when subjected to its rated peak pulse current (IPPM) of 62.0 A under the standard 10/1000 µs waveform. This value is measured per JEDEC test conditions and ensures predictable voltage limiting during surge events. The 3KASMC30AHM3_B/I maintains this clamping performance across its full operating temperature range up to TJ = 185 °C.
Is the 3KASMC30AHM3_B/I qualified for automotive applications?
Yes, the 3KASMC30AHM3_B/I is AEC-Q101 qualified, as confirmed by Vishay's documentation and ordering code suffix HM3. It meets all stress tests required for automotive-grade discrete components, including high-temperature reverse bias, temperature cycling, and surge endurance. The 3KASMC30AHM3_B/I is explicitly designated for use in automotive power electronics, such as body control modules and ADAS sensor interfaces.
What does the 'HM3' suffix indicate in 3KASMC30AHM3_B/I?
The 'HM3' suffix in 3KASMC30AHM3_B/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from HE3 (RoHS-compliant and AEC-Q101 qualified but not halogen-free) and confirms compliance with automotive material restrictions. The 3KASMC30AHM3_B/I also passes JESD 201 Class 2 whisker testing and meets MSL Level 1 reflow requirements.
What is the thermal resistance of the 3KASMC30AHM3_B/I?
The 3KASMC30AHM3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 77.5 °C/W when mounted on the minimum recommended pad layout, and a junction-to-leads thermal resistance (RθJL) of 18.3 °C/W. These values enable effective heat dissipation during repetitive surge events and support reliable operation at TJ = 185 °C. The 3KASMC30AHM3_B/I thermal performance is validated per JEDEC standards.
How does the 3KASMC30AHM3_B/I differ from the 3KASMC30AHE3_B/I?
The 3KASMC30AHM3_B/I and 3KASMC30AHE3_B/I share identical electrical specifications and SMC packaging, but differ in material composition: HM3 is halogen-free and HE3 is RoHS-compliant without halogen-free assurance. Both are AEC-Q101 qualified, but only the 3KASMC30AHM3_B/I satisfies strict automotive material declarations requiring halogen-free content. The 3KASMC30AHM3_B/I is the preferred choice for Tier 1 automotive supply chains with updated material compliance mandates.
3KASMC30AHM3_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):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 62A
- 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)
3KASMC30AHM3_B/I FAQ
1.How can I place an order for 3KASMC30AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC30AHM3_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 3KASMC30AHM3_B/I reliable?
The price and inventory of 3KASMC30AHM3_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 3KASMC30AHM3_B/I is usually 5 days.
3.What payment methods are accepted for 3KASMC30AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC30AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC30AHM3_B/I?
3KASMC30AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC30AHM3_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 3KASMC30AHM3_B/I?
For technical support, including 3KASMC30AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC30AHM3_B/I requirements.
6.How does Aetrix verify that 3KASMC30AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All 3KASMC30AHM3_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 3KASMC30AHM3_B/I meets industry standards.
7.What is the process for return or replacement of 3KASMC30AHM3_B/I?
All 3KASMC30AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC30AHM3_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 3KASMC30AHM3_B/I part is unused and in its original packaging.
Return procedure for 3KASMC30AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC30AHM3_B/I Tags
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