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Vishay General Semiconductor - Diodes Division 3KASMC28AHE3_B/H
- Part No.:
- 3KASMC28AHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC28AHE3_B/H.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,752
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Product details
Overview
3KASMC28AHE3_B/H from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) in SMC (DO-214AB) package, rated for 3000 W peak pulse power (10/1000 μs), 31.1–34.4 V breakdown voltage (VBR), and 185 °C maximum junction temperature - designed to protect automotive-grade MOSFETs and sensor signal lines against inductive switching transients.
For engineers reviewing the 3KASMC28AHE3_B/H datasheet, 3KASMC28AHE3_B/H pinout, 3KASMC28AHE3_B/H application, or 3KASMC28AHE3_B/H equivalent, key selection criteria include clamping voltage (45.4 V at IPPM), unidirectional polarity, AEC-Q101 qualification, and SMC package thermal performance under high-reliability automotive operating conditions.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology with junction passivation optimized for stable operation up to TJ = 185 °C. Its unidirectional architecture provides low clamping voltage (VC = 45.4 V) and fast response time to suppress transients induced by inductive load switching.
Rated for 3000 W peak pulse power per 10/1000 μs waveform and 200 A non-repetitive surge current (IFSM), it meets MSL Level 1 (260 °C reflow) and supports automotive applications requiring AEC-Q101 qualification - confirmed by HE3 suffix and base P/NHE3_X designation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 31.1 / 32.8 / 34.4 V - ensures reliable breakdown initiation above 28 V stand-off while accommodating process variation |
| VWM | 28 V - maximum continuous reverse voltage before leakage exceeds 1 μA, defining safe operating margin |
| VC @ IPPM | 45.4 V - clamping voltage during 3000 W transient, limiting downstream IC stress to safe levels |
| PPPM | 3000 W - peak pulse power handling capability with 10/1000 μs waveform, critical for automotive load-dump immunity |
| TJ max. | 185 °C - enables operation in under-hood environments without derating penalties |
| IR @ VWM | 1.0 μA - ultra-low reverse leakage preserves signal integrity on high-impedance sensor lines |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 77.5 °C/W RθJA, compatible with automated assembly |
Pinout & Package
Package: SMC (DO-214AB), molded case meeting UL 94 V-0, matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to system ground or low-side reference; enables unidirectional clamping from cathode to anode |
| Cathode | Current exit terminal during forward conduction; protected line connection point | Connected to protected signal/power line; absorbs transient energy when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive reliability including temperature cycling, HTRB, and ESD per AEC standard - required for engine control and ADAS modules |
| Junction passivated anisotropic rectifier | Stable VBR drift <0.09 %/°C and low leakage across -65 to +185 °C operating range |
| 3000 W peak pulse power (10/1000 μs) | Withstands ISO 7637-2 Pulse 1/2a/5a transients without degradation in automotive power nets |
| MSL Level 1 (260 °C peak) | Enables single-pass lead-free reflow without popcorn cracking or delamination |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns rise time), improving protection margin |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive Gate Protection |
|---|---|
Use Scenario: Protecting microcontroller I/O and CAN transceiver pins from load-dump and inductive kickback in 12 V vehicle electrical systems. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between protected signal line and chassis ground. Use Value: Clamps transients to ≤45.4 V within nanoseconds, preventing latch-up or oxide damage to 5 V logic interfaces. |
Use Scenario: Safeguarding gate drivers and bootstrap FETs in three-phase inverters subjected to rapid bus voltage collapse. IC Role / Device Role / Timing Role: Transient suppression on high-side gate drive return path to limit dv/dt-induced shoot-through risk. Use Value: Limits peak gate-source voltage excursion to <45.4 V during 200 A surge events, preserving MOSFET reliability. |
| Automotive Camera Module Power Input | Telecom Base Station Sensor Interface |
Use Scenario: Shielding 12 V input of rear-view camera modules from alternator ripple and ignition noise in passenger vehicles. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main power rail upstream of DC/DC converter. Use Value: Maintains 28 V stand-off with <1 μA leakage, enabling low-power sleep mode while blocking >31.1 V transients. |
Use Scenario: Protecting RS-485 transceivers and environmental sensors from lightning-induced surges on outdoor telecom cabinet wiring. IC Role / Device Role / Timing Role: Secondary-level TVS on differential data lines referenced to local ground plane. Use Value: Delivers 3000 W surge capacity with 45.4 V clamping, ensuring signal integrity during 10/1000 μs induced surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ28AHE3_A/H | Lower PPPM (600 W), same VBR range, SMB package (smaller footprint, higher RθJA) | Not suitable for automotive load-dump; limited to consumer/industrial low-energy transients | Select only if surge energy is ≤600 W and board space is constrained - not AEC-Q101 qualified |
| SMCJ28AHE3_A/H | Same PPPM (3000 W), identical VBR/VC, but SMC package with different leadform and thermal resistance (RθJL = 18.3 °C/W) | Direct functional replacement with identical protection level; differs only in mechanical mounting detail | Valid alternative when legacy SMCJ28AHE3_A/H inventory exists - same electrical behavior and AEC-Q101 compliance |
Compared with 3KASMC28AHE3_B/H, SMBJ28AHE3_A/H offers reduced surge robustness and no automotive qualification, while SMCJ28AHE3_A/H matches all key electrical specs and qualification - making it a functionally equivalent drop-in option where mechanical compatibility is verified.
Availability
3KASMC28AHE3_B/H is available at Aetrix Electronics and suitable for automotive ECU design, industrial motor drive development, and telecom sensor interface protection requiring stable component supply across extended temperature and high-reliability environments.
Supply support for 3KASMC28AHE3_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, rectifiers, and TVS devices, with emphasis on high-reliability, high-temperature, and automotive-qualified components.
The 3KASMCxxA family was developed specifically for AEC-Q101-compliant transient suppression in harsh automotive environments - delivering 185 °C junction capability and 3000 W pulse robustness in SMC packaging.
FAQ
What is the clamping voltage of the 3KASMC28AHE3_B/H under peak surge conditions?
The 3KASMC28AHE3_B/H has a maximum clamping voltage (VC) of 45.4 V when subjected to its rated peak pulse current (IPPM) under a 10/1000 μs waveform. This value is measured per standard test conditions and defines the upper voltage limit imposed on protected circuitry during transient events. The 3KASMC28AHE3_B/H maintains this clamping performance across its full operating temperature range, supporting robust protection in automotive under-hood applications.
Is the 3KASMC28AHE3_B/H qualified for automotive use?
Yes, the 3KASMC28AHE3_B/H is AEC-Q101 qualified, as confirmed by its HE3 suffix and documentation in Vishay's 88480 datasheet. It undergoes stress testing for high-temperature reverse bias, temperature cycling, and humidity exposure per AEC-Q101 requirements. The 3KASMC28AHE3_B/H is explicitly designated for automotive applications including engine control, ADAS, and body electronics where reliability under extreme thermal and electrical stress is mandatory.
What does the "HE3_B/H" suffix indicate in 3KASMC28AHE3_B/H?
The "HE3" suffix denotes RoHS-compliant, AEC-Q101-qualified construction with matte tin-plated leads and JESD 201 Class 2 whisker resistance. "B/H" specifies the revision code (B) and packaging format: 7-inch tape-and-reel with 850 units per reel (H). This ordering code ensures traceability, compliance, and compatibility with automated SMT placement equipment - critical for high-volume automotive manufacturing using the 3KASMC28AHE3_B/H.
How does the 3KASMC28AHE3_B/H differ from standard SMC-package TVS diodes?
The 3KASMC28AHE3_B/H distinguishes itself through junction passivation optimized for 185 °C operation, AEC-Q101 qualification, and guaranteed 3000 W peak pulse power with tight VBR tolerance (±5%). Unlike generic SMC TVS diodes, the 3KASMC28AHE3_B/H is characterized for automotive thermal derating curves and meets MSL Level 1 reflow standards - making it suitable for under-hood deployment where sustained high-temperature reliability is non-negotiable.
What is the maximum reverse leakage current of the 3KASMC28AHE3_B/H at rated stand-off voltage?
The 3KASMC28AHE3_B/H exhibits a maximum reverse leakage current (IR) of 1.0 μA at its rated stand-off voltage (VWM) of 28 V and ambient temperature of 25 °C. This ultra-low leakage preserves signal integrity on high-impedance sensor inputs and minimizes standby power loss in battery-powered automotive modules - a key design advantage confirmed in the Electrical Characteristics table of the Vishay 88480 datasheet for the 3KASMC28AHE3_B/H.
3KASMC28AHE3_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):
- 28V
- Voltage - Breakdown (Min):
- 31.1V
- Voltage - Clamping (Max) @ Ipp:
- 45.4V
- Current - Peak Pulse (10/1000µs):
- 66.1A
- 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)
3KASMC28AHE3_B/H FAQ
1.How can I place an order for 3KASMC28AHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC28AHE3_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 3KASMC28AHE3_B/H reliable?
The price and inventory of 3KASMC28AHE3_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 3KASMC28AHE3_B/H is usually 5 days.
3.What payment methods are accepted for 3KASMC28AHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC28AHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC28AHE3_B/H?
3KASMC28AHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC28AHE3_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 3KASMC28AHE3_B/H?
For technical support, including 3KASMC28AHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC28AHE3_B/H requirements.
6.How does Aetrix verify that 3KASMC28AHE3_B/H is sourced from the original manufacturer or authorized distributors?
All 3KASMC28AHE3_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 3KASMC28AHE3_B/H meets industry standards.
7.What is the process for return or replacement of 3KASMC28AHE3_B/H?
All 3KASMC28AHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC28AHE3_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 3KASMC28AHE3_B/H part is unused and in its original packaging.
Return procedure for 3KASMC28AHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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