My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMC3K22CAHM3/9A
- Part No.:
- SMC3K22CAHM3/9A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC3K22CAHM3/9A.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,859
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMC3K22CAHM3/9A from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, rated for 3000 W peak pulse power (10/1000 μs), 24.4 V to 26.9 V breakdown voltage at 1 mA, and 22 V standoff voltage. It provides clamping protection for automotive-grade sensor signal lines, MOSFET gate drivers, and industrial I/O interfaces against inductive switching transients and ESD.
For engineers reviewing the SMC3K22CAHM3/9A datasheet, SMC3K22CAHM3/9A pinout, SMC3K22CAHM3/9A application, or SMC3K22CAHM3/9A equivalent, key selection criteria include its AEC-Q101 qualification, 84.5 V max clamping voltage at 84.5 A peak pulse current, bidirectional polarity, and MSL Level 1 moisture sensitivity rating - all critical for automotive and high-reliability embedded designs.
Technical Context
The SMC3K22CAHM3/9A operates as a silicon avalanche diode with fast response time (<1 ns) and low incremental surge resistance, enabling effective suppression of transient overvoltages before downstream ICs are damaged. Its bidirectional structure allows symmetric clamping on both polarities without external polarity management.
Designed for operation across -55 °C to +150 °C junction temperature range, it supports automotive under-hood and industrial control environments. The HM3 suffix confirms halogen-free, RoHS-compliant construction with JESD 201 Class 2 whisker resistance and AEC-Q101 qualification - not merely commercial-grade M3 variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 μs) | 3000 W - sustains high-energy transients common in automotive load-dump and inductive kick scenarios |
| Breakdown Voltage VBR | 24.4 V to 26.9 V at 1 mA - defines precise avalanche onset threshold for predictable clamping behavior |
| Standoff Voltage VWM | 22 V - maximum continuous reverse voltage before leakage exceeds 2 μA; sets operating margin below VBR |
| Max Clamping Voltage VC | 35.5 V at 84.5 A IPPM - limits voltage seen by protected circuit during worst-case surge |
| Junction Temperature Range | -55 °C to +150 °C - enables deployment in engine control units and industrial motor drives |
| Package | SMC (DO-214AB) - industry-standard 2-pin surface-mount outline with 8.0 mm × 8.0 mm copper pad requirement |
| AEC-Q101 Qualified | Yes - validated for automotive electronic systems per stress test requirements including HTOL, TCT, and ESD |
Pinout & Package
SMC3K22CAHM3/9A uses the standard SMC (DO-214AB) package: two-terminal, unidirectional marking-free bidirectional device with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. No polarity marking; terminals are symmetrical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals serve identical avalanche clamping function; no orientation required during placement |
| Cathode Band (absent) | Polarity indicator | Not applicable - bidirectional design eliminates need for cathode marking or orientation-dependent routing |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints |
| 3000 W peak pulse power | Handles high-energy transients from relay coils, solenoids, and motor commutation in automotive subsystems |
| AEC-Q101 qualification | Validates reliability for automotive applications including ADAS sensors and body control modules |
| MSL Level 1 (260 °C reflow) | Supports standard lead-free PCB assembly without pre-baking or special handling |
| UL 497B recognition (E136766) | Meets safety standards for telecom and industrial equipment requiring certified surge protection |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load-dump and jump-start transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector or IC input pins to limit voltage excursion before damage occurs. Use Value: Maintains signal integrity under ISO 7637-2 Pulse 5a (load dump) with clamping below 35.5 V, preserving MCU ADC input range. |
Use Scenario: Safeguarding PLC digital input modules against field-wiring induced surges from solenoid valves and contactors. IC Role / Device Role / Timing Role: Primary transient suppressor on 24 V DC input lines, positioned upstream of optocoupler or Schmitt trigger inputs. Use Value: Withstands repeated 3000 W pulses without degradation, extending system uptime in factory automation environments. |
| Motor Drive Gate Protection | Telecom Line Interface |
Use Scenario: Shielding high-side/low-side MOSFET gate drivers in BLDC inverters from Miller-induced voltage spikes during switching transitions. IC Role / Device Role / Timing Role: Fast-response TVS placed between gate and source to clamp dv/dt-induced overshoot before driver IC latch-up. Use Value: Sub-1 ns response ensures clamping occurs within first 10 ns of transient onset, preventing false turn-on or gate oxide failure. |
Use Scenario: Protecting Ethernet PHY front-end circuits and PoE injectors from lightning-induced surges on twisted-pair lines per IEC 61000-4-5. IC Role / Device Role / Timing Role: Secondary-level TVS used in conjunction with GDTs or primary MOVs to refine clamping level at IC interface. Use Value: UL 497B recognition and 35.5 V clamping enable compliance with GR-1089-CORE telecom surge immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMC3K22CAHM3_A | Same electrical specs and AEC-Q101 qualification; differs only in packaging suffix (_A denotes updated tape/reel labeling per Vishay's revision policy) | No functional difference; compatible with same PCB layout and assembly process | Select when sourcing newer production lots aligned with Vishay's post-2022 documentation revisions |
| SMC3K24CAHM3/9A | Higher VBR (26.7–29.5 V) and VWM (24 V); clamps at 38.9 V vs. 35.5 V - 3.4 V higher clamping voltage | Better suited for 24 V nominal systems with wider tolerance margins; less suitable where strict <36 V clamping is required | Choose when protecting circuits with higher operating voltage headroom or where tighter VBR tolerance is not critical |
Compared with SMC3K22CAHM3/9A, SMC3K22CAHM3_A offers identical performance in an updated packaging format, while SMC3K24CAHM3/9A trades lower clamping voltage for higher standoff - making the original part optimal for 22 V systems needing minimal clamping overshoot.
Availability
SMC3K22CAHM3/9A is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom line interface boards requiring stable component supply and long-term lifecycle support.
Supply support for SMC3K22CAHM3/9A 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, efficiency, and automotive-grade validation.
The SMC3KxxCA series was developed specifically for high-power transient suppression in harsh-environment applications, combining AEC-Q101 qualification with 3000 W surge capability in compact SMC packages.
FAQ
What does the "HM3" suffix mean in SMC3K22CAHM3/9A?
The HM3 suffix in SMC3K22CAHM3/9A indicates halogen-free, RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker resistance. It distinguishes this automotive-grade variant from the commercial M3 version, confirming suitability for automotive electronics and high-reliability industrial use.
Is SMC3K22CAHM3/9A suitable for new designs?
No - Vishay explicitly marks SMC3K22CAHM3/9A as "Not for New Designs" in its datasheet (Document Number 89433, Revision 13-Sep-2022), recommending migration to the SMC3K10CAHM3_A through SMC3K120CAHM3_A family. SMC3K22CAHM3/9A remains available for legacy support and existing production.
What is the maximum clamping voltage of SMC3K22CAHM3/9A and at what current?
The SMC3K22CAHM3/9A has a maximum clamping voltage (VC) of 35.5 V at 84.5 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuits during surge events.
Does SMC3K22CAHM3/9A have polarity markings on the package?
No - SMC3K22CAHM3/9A is a bidirectional TVS diode and carries no polarity markings. Its symmetrical terminal structure means either end may connect to the line or ground side of the protected circuit, simplifying layout and eliminating orientation errors during automated placement.
What is the moisture sensitivity level (MSL) rating for SMC3K22CAHM3/9A?
SMC3K22CAHM3/9A meets MSL Level 1 per J-STD-020, with a maximum peak reflow temperature of 260 °C. This allows indefinite floor life at ambient conditions and compatibility with standard lead-free reflow profiles without baking or special handling prior to assembly.
SMC3K22CAHM3/9A 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):
- 22V
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 35.5V
- Current - Peak Pulse (10/1000µs):
- 84.5A
- 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)
SMC3K22CAHM3/9A FAQ
1.How can I place an order for SMC3K22CAHM3/9A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC3K22CAHM3/9A 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 SMC3K22CAHM3/9A reliable?
The price and inventory of SMC3K22CAHM3/9A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC3K22CAHM3/9A is usually 5 days.
3.What payment methods are accepted for SMC3K22CAHM3/9A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC3K22CAHM3/9A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC3K22CAHM3/9A?
SMC3K22CAHM3/9A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC3K22CAHM3/9A 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 SMC3K22CAHM3/9A?
For technical support, including SMC3K22CAHM3/9A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC3K22CAHM3/9A requirements.
6.How does Aetrix verify that SMC3K22CAHM3/9A is sourced from the original manufacturer or authorized distributors?
All SMC3K22CAHM3/9A 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 SMC3K22CAHM3/9A meets industry standards.
7.What is the process for return or replacement of SMC3K22CAHM3/9A?
All SMC3K22CAHM3/9A units undergo pre-shipment inspection (PSI). If there is an issue with SMC3K22CAHM3/9A, 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 SMC3K22CAHM3/9A part is unused and in its original packaging.
Return procedure for SMC3K22CAHM3/9A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC3K22CAHM3/9A 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 …
