My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMC3K28CAHM3/57
- Part No.:
- SMC3K28CAHM3/57
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC3K28CAHM3/57.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,516
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMC3K28CAHM3/57 from Vishay General Semiconductor is a bidirectional surface-mount TRANSZORB® 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, and 45.4 V maximum clamping voltage at 66.1 A surge current. It provides robust overvoltage protection for automotive sensor signal lines, industrial I/O interfaces, and MOSFET gate drivers.
For engineers reviewing the SMC3K28CAHM3/57 datasheet, SMC3K28CAHM3/57 pinout, SMC3K28CAHM3/57 application, or SMC3K28CAHM3/57 equivalent, key selection criteria include its AEC-Q101 qualification, bidirectional polarity, 28 V stand-off voltage, low incremental surge resistance, and compatibility with reflow soldering per J-STD-020 MSL level 1.
Technical Context
This TVS diode operates as a voltage-clamping protection device that responds within picoseconds to transients induced by inductive load switching or ESD events. Its bidirectional structure enables symmetrical clamping across both polarities without external polarity management.
Designed for high-energy surge suppression, it delivers 3000 W peak pulse power with a 10/1000 μs waveform and maintains stable clamping performance up to 150 °C junction temperature. The SMC (DO-214AB) package supports thermal dissipation required for repetitive surge handling in automotive and industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 μs) | 3000 W - sustains high-energy transients without failure in automotive load-dump or inductive kick scenarios |
| Breakdown Voltage VBR | 31.1–34.4 V at 1 mA - defines precise voltage threshold where clamping initiates under controlled test conditions |
| Stand-off Voltage VWM | 28 V - maximum continuous reverse working voltage before leakage exceeds 2 μA, ensuring no false triggering |
| Maximum Clamping Voltage VC | 45.4 V at 66.1 A - limits downstream voltage stress during worst-case surge, protecting 3.3 V/5 V/12 V logic and power stages |
| Junction Temperature Range | −55 °C to +150 °C - supports operation in under-hood automotive and industrial ambient environments |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 8.0 mm × 8.0 mm copper pad area for thermal reliability |
| Qualification | AEC-Q101 qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
SMC3K28CAHM3/57 uses the standard SMC (DO-214AB) package: a two-terminal, surface-mount, molded plastic case with matte tin-plated leads. Polarity is unmarked due to bidirectional construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (K) | Transient current return path | Connected to system ground or low-impedance reference; carries full surge current during clamping |
| Anode (A) | Transient current entry point | Connected to protected line (e.g., CAN_H, LIN, sensor output); forms symmetrical clamp with cathode |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional polarity | Enables single-device protection of AC-coupled or differential signal lines (e.g., CAN, LIN, RS-485) without polarity awareness |
| 3000 W peak pulse power | Handles severe transients such as ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 Level 4 surges |
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, high-temperature reverse bias, and mechanical shock |
| MSL Level 1 (260 °C) | Compatible with standard lead-free reflow profiles without moisture-related popcorn failure |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for global automotive and industrial OEM supply chains |
Applications
| Automotive Sensor Protection | Industrial I/O Interface Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, or position sensors in engine control units and ADAS modules. IC Role / Device Role / Timing Role: Voltage-clamping TVS placed between sensor output and microcontroller ADC input. Use Value: Limits transient-induced ADC saturation or latch-up while maintaining 28 V stand-off for normal 5 V sensor rail operation. |
Use Scenario: Shielding 24 V PLC digital input channels from field-wiring induced surges and relay contact bounce. IC Role / Device Role / Timing Role: Primary overvoltage clamp on dry-contact or optocoupler input stage. Use Value: Clamps to ≤45.4 V during 1 kV/0.5 kΩ surge, preventing damage to upstream Schmitt-trigger or isolation ICs. |
| MOSFET Gate Driver Protection | Telecom Line Interface Protection |
Use Scenario: Safeguarding high-side and low-side gate drive signals in motor inverter half-bridges exposed to shoot-through or Miller-induced spikes. IC Role / Device Role / Timing Role: Fast-response clamp on gate-source or gate-drain nodes. Use Value: Sub-nanosecond response prevents gate oxide rupture; 45.4 V clamping protects 20 V-rated gate drivers. |
Use Scenario: Protecting Ethernet PHY or PoE controller inputs against lightning-induced surges on RJ45 ports in network switches and base stations. IC Role / Device Role / Timing Role: Secondary-level TVS on differential pairs after primary gas discharge tube (GDT). Use Value: Low clamping voltage ensures PHY ICs remain within absolute maximum ratings during combined GDT+TVS coordinated protection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMC3K28CAHM3_A/57 | Same electrical specs and AEC-Q101 qualification; updated suffix denotes revised internal process control and traceability | No functional difference; fully interchangeable in existing designs requiring latest manufacturing lot traceability | Preferred for new production builds requiring enhanced process consistency and extended lifecycle support |
| SMAJ28A | Lower 400 W peak pulse power; SMA package (smaller thermal mass); unidirectional only | Not suitable for bidirectional signal lines or high-energy automotive transients; limited to low-power consumer electronics | Select only for cost-sensitive, non-automotive applications with <1 kV surge exposure and no polarity reversal |
Compared with SMC3K28CAHM3/57, the SMC3K28CAHM3_A/57 offers identical protection performance with improved manufacturing traceability, while SMAJ28A trades clamping robustness and polarity flexibility for smaller size and lower cost-making it unsuitable for automotive or industrial surge immunity requirements.
Availability
SMC3K28CAHM3/57 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O hardening, and MOSFET gate driver safeguarding requiring stable component supply and long-term lifecycle assurance.
Supply support for SMC3K28CAHM3/57 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 reliability and application-specific performance.
The SMC3KxxCA series was developed specifically for high-energy transient suppression in automotive and industrial systems, targeting AEC-Q101 compliance and robust 3000 W surge handling in compact SMC packaging.
FAQ
What is the clamping voltage of SMC3K28CAHM3/57 at its rated peak pulse current?
The SMC3K28CAHM3/57 has a maximum clamping voltage (VC) of 45.4 V when subjected to its rated peak pulse current of 66.1 A using a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees predictable voltage limiting during surge events, directly protecting downstream 3.3 V, 5 V, or 12 V circuitry without overstress.
Is SMC3K28CAHM3/57 suitable for automotive applications?
Yes, SMC3K28CAHM3/57 is AEC-Q101 qualified and explicitly designed for automotive use, including engine control, ADAS, and body electronics. Its 150 °C max junction temperature, MSL Level 1 reflow compatibility, and validation against temperature cycling and high-temperature reverse bias make it appropriate for under-hood and cabin-mounted modules where SMC3K28CAHM3/57 must withstand harsh thermal and mechanical stress.
What does the "HM3" suffix indicate in SMC3K28CAHM3/57?
The "HM3" suffix in SMC3K28CAHM3/57 denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker resistance. It distinguishes this grade from the commercial "M3" variant and confirms compliance with automotive reliability standards, including extended temperature operation and enhanced metallurgical stability of the matte tin-plated leads.
Can SMC3K28CAHM3/57 replace SMC3K28CA-M3/57 in an existing design?
Yes, SMC3K28CAHM3/57 is a direct replacement for SMC3K28CA-M3/57 in terms of pinout, package, electrical characteristics, and thermal performance. The HM3 version adds AEC-Q101 qualification and whisker-resistant plating, making it suitable for automotive upgrades or industrial designs requiring higher reliability-no PCB or layout changes are needed for SMC3K28CAHM3/57 integration.
What is the standoff voltage rating for SMC3K28CAHM3/57?
The standoff voltage (VWM) for SMC3K28CAHM3/57 is 28 V, meaning it remains in high-impedance state with ≤2 μA leakage current up to this DC or RMS voltage. This allows safe integration into 24 V nominal systems-such as automotive battery-supplied circuits-where SMC3K28CAHM3/57 avoids false triggering while providing margin above operating voltage before clamping begins.
SMC3K28CAHM3/57 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMC3K28CAHM3/57 FAQ
1.How can I place an order for SMC3K28CAHM3/57 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC3K28CAHM3/57 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 SMC3K28CAHM3/57 reliable?
The price and inventory of SMC3K28CAHM3/57 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC3K28CAHM3/57 is usually 5 days.
3.What payment methods are accepted for SMC3K28CAHM3/57?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC3K28CAHM3/57 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC3K28CAHM3/57?
SMC3K28CAHM3/57 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC3K28CAHM3/57 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 SMC3K28CAHM3/57?
For technical support, including SMC3K28CAHM3/57 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC3K28CAHM3/57 requirements.
6.How does Aetrix verify that SMC3K28CAHM3/57 is sourced from the original manufacturer or authorized distributors?
All SMC3K28CAHM3/57 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 SMC3K28CAHM3/57 meets industry standards.
7.What is the process for return or replacement of SMC3K28CAHM3/57?
All SMC3K28CAHM3/57 units undergo pre-shipment inspection (PSI). If there is an issue with SMC3K28CAHM3/57, 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 SMC3K28CAHM3/57 part is unused and in its original packaging.
Return procedure for SMC3K28CAHM3/57:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC3K28CAHM3/57 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
