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Vishay General Semiconductor - Diodes Division 3KASMC15AHM3_B/I
- Part No.:
- 3KASMC15AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC15AHM3_B/I.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,137
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Product details
Overview
3KASMC15AHM3_B/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) in SMC (DO-214AB) package, rated for 15 V stand-off voltage (VWM), 17.6 V nominal breakdown (VBR), 3000 W peak pulse power (10/1000 μs), 24.4 V clamping voltage at 123 A IPPM, and 185 °C maximum junction temperature - deployed for automotive power rail and sensor line surge protection.
For engineers reviewing the 3KASMC15AHM3_B/I datasheet, 3KASMC15AHM3_B/I pinout, 3KASMC15AHM3_B/I application, or 3KASMC15AHM3_B/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, halogen-free RoHS compliance, MSL Level 1 rating, and thermal resistance of 77.5 °C/W (junction-to-ambient).
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to deliver stable clamping under repetitive surge stress up to TJ = 185 °C. Its low incremental surge resistance and fast response time ensure effective suppression of inductive switching transients on 12 V/24 V automotive power nets.
The device operates exclusively in unidirectional mode with cathode-band polarity marking, and is characterized per ANSI/IEEE C62.35 for surge immunity. It meets JESD201 Class 2 whisker resistance and J-STD-020 MSL Level 1 reflow requirements (260 °C peak).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR (nom) | 17.6 V at 1.0 mA - precise breakdown threshold enabling accurate overvoltage trip point |
| VC @ IPPM | 24.4 V at 123 A - clamping voltage limiting downstream IC stress during 3 kW surges |
| PPPM | 3000 W (10/1000 μs) - robust energy handling for ISO 7637-2 Pulse 1/2a/5a automotive transients |
| TJ max | +185 °C - supports under-hood placement without derating in high-temperature engine compartments |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 7.11 mm body length and 3.20 mm width |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including HTOL, TC, and UHAST |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads; cathode identified by color band; compliant with UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge current return path | Connected to ground or low-impedance reference plane to complete clamping loop |
| Cathode | Protected line connection | Connected to the line being protected (e.g., battery feed, sensor supply); color band marks this terminal |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Enables stable VBR drift < ±5 % over 1000 hrs HTOL at 175 °C |
| MSL Level 1 | Allows single-reflow assembly without moisture-induced popcorn failure |
| Halogen-free & RoHS | Meets automotive ELV Directive and IPC-1752A material declaration requirements |
| Low RSURGE | Minimizes clamping overshoot during fast-rising transients (e.g., load dump edge rates > 100 V/μs) |
| J-STD-002/JESD22-B102 solderability | Guarantees reliable lead wetting across Pb-free SAC305 and SnPb pastes |
Applications
| Automotive Power Rail Protection | Engine Control Unit (ECU) Input Protection |
|---|---|
Use Scenario: Suppressing ISO 7637-2 Pulse 5a (load dump) on 12 V battery feeds to body control modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and local DC/DC input to clamp transients above 27.5 V. Use Value: Limits peak voltage to 24.4 V at 123 A, preventing damage to 36 V-rated LDOs and microcontrollers. | Use Scenario: Protecting ECU 5 V sensor supply lines from coupled transients induced by fuel injector switching. IC Role / Device Role / Timing Role: Secondary-level TVS downstream of main rail protector, sized for lower-energy events. Use Value: Fast response (< 1 ns) and low clamping voltage preserve signal integrity for analog sensor front-ends. |
| ADAS Camera Module Power Input | Industrial CAN Transceiver Bus Line |
Use Scenario: Safeguarding 12 V input to automotive camera modules mounted near headlights or grille. IC Role / Device Role / Timing Role: Primary overvoltage clamp on camera module PCB, placed adjacent to connector entry point. Use Value: 185 °C TJ rating ensures operation in ambient temperatures up to 125 °C without derating. | Use Scenario: Protecting isolated CAN FD transceivers against ESD and inductive kickback on vehicle bus lines. IC Role / Device Role / Timing Role: Unidirectional TVS on CAN_H/CAN_L lines referenced to local ground, meeting ISO 11898-2 EMC requirements. Use Value: 3000 W PPPM handles worst-case bus short-circuit energy while maintaining < 1 pF junction capacitance at zero bias. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15AHE3_A/H | Same VWM/VBR/VC specs but rated for 400 W PPPM (not 3000 W); SOD-123FL package | Not suitable for load dump; limited to ESD and low-energy transients | Select only for space-constrained consumer electronics where 3 kW surge immunity is unnecessary |
| SMCJ15AHE3_A/H | Identical 3000 W PPPM, same SMC package, but not AEC-Q101 qualified; RoHS-compliant only | Lacks automotive qualification evidence; requires customer requalification for automotive use | Acceptable for industrial controls where AEC-Q101 is not mandated, but not for OEM automotive programs |
Compared with SMAJ15AHE3_A/H and SMCJ15AHE3_A/H, the 3KASMC15AHM3_B/I delivers automotive-grade reliability (AEC-Q101), halogen-free compliance, and guaranteed 3000 W surge capability in a production-validated SMC footprint - making it the only option qualified for Tier-1 automotive power rail designs without additional validation overhead.
Availability
3KASMC15AHM3_B/I is available at Aetrix Electronics and suitable for automotive power rail protection, ADAS camera module inputs, and industrial CAN bus interface designs requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for 3KASMC15AHM3_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 is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on high-reliability, high-temperature, and automotive-qualified components.
The 3KASMCxxA family was designed specifically for demanding automotive and industrial transient suppression, combining PAR® technology, AEC-Q101 qualification, and extended junction temperature capability to replace legacy TVS solutions in under-hood and safety-critical systems.
FAQ
What is the clamping voltage of the 3KASMC15AHM3_B/I at its rated peak pulse current?
The 3KASMC15AHM3_B/I has a maximum clamping voltage (VC) of 24.4 V when subjected to its rated peak pulse current (IPPM) of 123 A under the standard 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting for downstream 28 V-rated components. The 3KASMC15AHM3_B/I maintains this clamping performance across its full operating temperature range.
Is the 3KASMC15AHM3_B/I qualified to AEC-Q101, and what does that qualification cover?
Yes, the 3KASMC15AHM3_B/I is AEC-Q101 qualified - confirmed by Vishay's documentation for the HM3 suffix variant. This qualification covers stress tests including high-temperature operating life (HTOL), temperature cycling (TC), unbiased highly accelerated stress test (UHAST), and electrostatic discharge (HBM). The 3KASMC15AHM3_B/I is certified for use in automotive powertrain, chassis, and ADAS applications where reliability under thermal and mechanical stress is mandatory.
What is the difference between the HE3 and HM3 suffixes in the 3KASMC15A series?
The HE3 suffix denotes RoHS-compliant and AEC-Q101-qualified parts, while HM3 indicates halogen-free, RoHS-compliant, and AEC-Q101-qualified variants. The 3KASMC15AHM3_B/I carries the HM3 suffix, meaning it meets both RoHS Directive 2011/65/EU and IEC 61249-2-21 for halogen-free content (< 900 ppm Br, < 900 ppm Cl, total ≤ 1500 ppm). This makes the 3KASMC15AHM3_B/I suitable for automotive OEMs enforcing strict material declarations.
Can the 3KASMC15AHM3_B/I be used in bidirectional configurations?
No, the 3KASMC15AHM3_B/I is unidirectional only, as explicitly stated in the Vishay datasheet. It features a single cathode band and is designed to clamp positive transients relative to ground. For bidirectional protection (e.g., AC lines or differential buses), a separate device such as the SMBJ15CAHM3_B/I or dual-series configuration would be required - the 3KASMC15AHM3_B/I does not support reverse-polarity conduction.
What is the thermal resistance (RθJA) of the 3KASMC15AHM3_B/I, and how does it affect layout design?
The 3KASMC15AHM3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 77.5 °C/W when mounted on the minimum recommended pad layout per Vishay's datasheet. This value assumes no heatsinking; designers must allocate ≥ 30 mm² copper area per terminal and avoid thermal isolation to maintain safe TJ rise. Exceeding 185 °C junction temperature invalidates the 3KASMC15AHM3_B/I's surge ratings and AEC-Q101 qualification.
3KASMC15AHM3_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):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 24.4V
- Current - Peak Pulse (10/1000µs):
- 123A
- 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)
3KASMC15AHM3_B/I FAQ
1.How can I place an order for 3KASMC15AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC15AHM3_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 3KASMC15AHM3_B/I reliable?
The price and inventory of 3KASMC15AHM3_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 3KASMC15AHM3_B/I is usually 5 days.
3.What payment methods are accepted for 3KASMC15AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC15AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC15AHM3_B/I?
3KASMC15AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC15AHM3_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 3KASMC15AHM3_B/I?
For technical support, including 3KASMC15AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC15AHM3_B/I requirements.
6.How does Aetrix verify that 3KASMC15AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All 3KASMC15AHM3_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 3KASMC15AHM3_B/I meets industry standards.
7.What is the process for return or replacement of 3KASMC15AHM3_B/I?
All 3KASMC15AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC15AHM3_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 3KASMC15AHM3_B/I part is unused and in its original packaging.
Return procedure for 3KASMC15AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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