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Vishay General Semiconductor - Diodes Division 3KASMC30AHM3_B/H
- Part No.:
- 3KASMC30AHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC30AHM3_B/H.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,054
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Product details
Overview
3KASMC30AHM3_B/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode 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), and 185 °C maximum junction temperature-designed for automotive-grade overvoltage protection of power rails and signal lines in engine control units.
For engineers reviewing the 3KASMC30AHM3_B/H datasheet, 3KASMC30AHM3_B/H pinout, 3KASMC30AHM3_B/H application, or 3KASMC30AHM3_B/H equivalent, key selection criteria include clamping voltage (48.4 V at 62 A), unidirectional polarity, AEC-Q101 qualification, halogen-free RoHS compliance, and thermal resistance (RθJA = 77.5 °C/W) under standard PCB layout.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to achieve stable clamping performance across -65 °C to +185 °C operating range. Its 10/1000 μs waveform response delivers 62 A peak pulse current with 48.4 V clamping voltage and low incremental surge resistance-critical for suppressing load-dump transients in 12 V automotive systems.
The device is qualified to AEC-Q101, meets MSL Level 1 (260 °C reflow), and features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. The cathode band denotes polarity, and its SMC package supports high-reliability mounting on minimum recommended pad layout per JEDEC standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum reverse stand-off voltage before conduction begins; defines safe operating margin below clamping threshold |
| VBR (min/typ/max) | 33.3 / 35.1 / 36.8 V at 1 mA - Confirmed breakdown range ensures predictable turn-on during transients |
| VC @ IPPM | 48.4 V at 62 A - Clamping voltage limits downstream IC stress during 3000 W surge events |
| PPPM | 3000 W (10/1000 μs) - Peak pulse power rating validated for automotive load-dump and ISO 7637-2 pulse 5a |
| TJ max. | +185 °C - Enables operation in under-hood environments without derating in most PCB layouts |
| RθJA | 77.5 °C/W - Thermal resistance measured on standard JEDEC test board; guides heatsinking requirements |
| Polarity | Unidirectional - Protects only against positive-going transients; requires correct orientation in series with protected line |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, AEC-Q101 qualified. Cathode marked by band; anode and cathode terminals are axially oriented along body length.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input terminal for protected circuit side | Connected to line being protected (e.g., battery rail); conducts during forward-biased surges |
| Cathode | Reference terminal tied to ground or return path | Marked by color band; establishes unidirectional clamping direction toward common reference |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Enables stable leakage (<1 μA at VWM) and repeatable breakdown over 1000+ surge cycles |
| TJ = 185 °C capability | Supports uninterrupted operation in engine bay locations where ambient exceeds 125 °C |
| 3000 W peak pulse power (10/1000 μs) | Meets ISO 7637-2 Pulse 5a (load dump) requirements for 12 V automotive systems |
| MSL Level 1, 260 °C peak reflow | Allows single-pass lead-free reflow without popcorn or delamination risk |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive use including temperature cycling, HTRB, and surge endurance tests |
Applications
| Engine Control Unit (ECU) Power Input | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Protection against alternator load-dump transients (ISO 7637-2 Pulse 5a) on 12 V supply rail feeding microcontroller and sensor interfaces. IC Role / Device Role: Unidirectional TVS placed between battery input and DC/DC converter input stage. Use Value: Clamps 48.4 V at 62 A to prevent damage to 36 V-rated input capacitors and LDO regulators. | Use Scenario: Guarding LIN bus transceiver power pins against coupled transients from adjacent motor drivers (e.g., window lift, seat adjust). IC Role / Device Role: Secondary overvoltage clamp downstream of primary fuse and upstream of local regulator. Use Value: Limits voltage excursion to <50 V during 100 ms surges, preserving transceiver ESD robustness and logic-level integrity. |
| Industrial PLC Digital Input Module | EV Onboard Charger (OBC) Auxiliary Supply |
Use Scenario: Suppressing inductive kickback from 24 V solenoid switching on isolated digital input channels. IC Role / Device Role: Fast-response TVS mounted directly at connector entry point before optocoupler input. Use Value: Responds in <1 ns to clamp spikes up to 3000 W, preventing false triggering and optocoupler degradation. | Use Scenario: Safeguarding 12 V auxiliary supply rail in OBC against battery reversal and jump-start transients. IC Role / Device Role: Unidirectional TVS on output of auxiliary DC/DC converter feeding MCU and CAN interface. Use Value: Withstands repeated 185 °C junction temperature excursions during continuous OBC operation while maintaining clamping stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30AHE3_A/H | Same VWM (30 V), lower PPPM (600 W), SMB package (smaller footprint, higher RθJA) | Rated for consumer/industrial use only; not AEC-Q101 qualified | Select when space-constrained and automotive qualification is unnecessary |
| SMCJ30AHE3_A/H | Same VWM (30 V), identical PPPM (3000 W), same SMC package, but HE3 (not HM3) suffix | RoHS-compliant and AEC-Q101 qualified, but not halogen-free | Choose when halogen-free requirement is waived but full automotive qualification remains mandatory |
Compared with 3KASMC30AHM3_B/H, SMBJ30AHE3_A/H offers smaller size but reduced surge capacity and no automotive qualification, while SMCJ30AHE3_A/H matches power and package but lacks halogen-free certification-making 3KASMC30AHM3_B/H the sole option meeting all three: 3000 W, AEC-Q101, and halogen-free compliance.
Availability
3KASMC30AHM3_B/H is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, EV onboard chargers, and body control modules requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 3KASMC30AHM3_B/H 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, MOSFETs, and TVS devices, with emphasis on reliability, thermal performance, and automotive-grade qualification.
The 3KASMCxxA family targets high-temperature, high-surge automotive and industrial power-line protection, delivering AEC-Q101-compliant transient suppression in ruggedized SMC packaging.
FAQ
What is the clamping voltage of the 3KASMC30AHM3_B/H under peak surge conditions?
The 3KASMC30AHM3_B/H has a maximum clamping voltage (VC) of 48.4 V at 62 A peak pulse current (IPPM) using a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and reflects actual device behavior during standardized surge testing-not a calculated or typical value. The 3KASMC30AHM3_B/H maintains this clamping performance across its full operating temperature range up to +185 °C junction temperature.
Is the 3KASMC30AHM3_B/H qualified for automotive applications?
Yes, the 3KASMC30AHM3_B/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3", which denotes halogen-free, RoHS-compliant, and AEC-Q101-qualified construction. It undergoes full stress testing including HTGB, HTRB, temperature cycling, and surge endurance per AEC-Q101 Rev G. The 3KASMC30AHM3_B/H is intended for under-hood and chassis-mounted automotive modules where high junction temperature and transient immunity are required.
What does the "HM3" suffix indicate in 3KASMC30AHM3_B/H?
The "HM3" suffix in 3KASMC30AHM3_B/H identifies it as halogen-free, RoHS-compliant, and AEC-Q101 qualified-distinct from "HE3" variants that are RoHS-compliant and AEC-Q101 qualified but not halogen-free. The "B/H" denotes packaging: 7-inch tape-and-reel with 850 units per reel. The 3KASMC30AHM3_B/H meets JESD201 Class 2 whisker resistance and MSL Level 1 reflow compatibility.
How does the thermal resistance of the 3KASMC30AHM3_B/H affect PCB layout?
The 3KASMC30AHM3_B/H has a typical junction-to-ambient thermal resistance (RθJA) of 77.5 °C/W when mounted on the minimum recommended pad layout per JEDEC standards. To maintain TJ ≤ 185 °C at full 6.0 W steady-state dissipation, designers must ensure adequate copper area and avoid excessive thermal isolation. The 3KASMC30AHM3_B/H benefits from thermal vias under the cathode/anode pads and should not be placed near heat sources without derating analysis.
Can the 3KASMC30AHM3_B/H replace older SMC-format TVS diodes like SMAJ30A?
No, the 3KASMC30AHM3_B/H is not a direct replacement for SMAJ30A due to differing package dimensions (SMC vs. SMA), higher power rating (3000 W vs. 400 W), and stricter automotive qualification. While both are unidirectional TVS diodes with ~30 V VWM, the 3KASMC30AHM3_B/H requires larger PCB pads, different thermal management, and supports significantly higher surge currents. Substitution would require layout revision and revalidation per ISO 7637-2.
3KASMC30AHM3_B/H 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 (SMCJ)
3KASMC30AHM3_B/H FAQ
1.How can I place an order for 3KASMC30AHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC30AHM3_B/H 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/H reliable?
The price and inventory of 3KASMC30AHM3_B/H 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/H is usually 5 days.
3.What payment methods are accepted for 3KASMC30AHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC30AHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC30AHM3_B/H?
3KASMC30AHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC30AHM3_B/H 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/H?
For technical support, including 3KASMC30AHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC30AHM3_B/H requirements.
6.How does Aetrix verify that 3KASMC30AHM3_B/H is sourced from the original manufacturer or authorized distributors?
All 3KASMC30AHM3_B/H 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/H meets industry standards.
7.What is the process for return or replacement of 3KASMC30AHM3_B/H?
All 3KASMC30AHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC30AHM3_B/H, 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/H part is unused and in its original packaging.
Return procedure for 3KASMC30AHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC30AHM3_B/H Tags
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