My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMC3K22CAHM3_A/H
- Part No.:
- SMC3K22CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC3K22CAHM3_A/H.pdf
- Description:
- 3KW, 22V 5%,BIDIR,SMC TVS
- Quantity:
- Payment:
- Shipping:
Inventory:1,043
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMC3K22CAHM3_A from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in automotive and industrial power lines. It features a 22 V standoff voltage (VWM), 24.4–26.9 V breakdown voltage (VBR), 35.5 V clamping voltage at 84.5 A (10/1000 μs), 3000 W peak pulse power, and AEC-Q101 qualification - deployed to safeguard MOSFETs and sensor signal lines against ISO 7637-2 Pulse 1/2a/3a/3b transients.
For engineers reviewing the SMC3K22CAHM3_A datasheet, SMC3K22CAHM3_A pinout, SMC3K22CAHM3_A application, or SMC3K22CAHM3_A equivalent, key selection criteria include clamping performance under 10/1000 μs and 8/20 μs waveforms, bidirectional surge handling up to ±30 kV ESD (IEC 61000-4-2), thermal resistance (RthJA = 90 °C/W), and SMC (DO-214AB) package compatibility with high-reliability automotive PCB layouts.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, responding within picoseconds to transient overvoltages by transitioning from high-impedance to low-impedance state. Its bidirectional architecture enables symmetric clamping of both positive and negative surges without polarity marking, critical for unidirectional DC bus protection where reverse transients occur.
It meets ISO 7637-2 Pulse 1 (−150 V, 2 ms), Pulse 2a (+112 V, 50 μs), and Pulse 3a/b (±150–220 V, 150 ns) requirements in 12 V automotive systems, with verified clamping voltages of −32 V / +37 V (Pulse 1/Pulse 2a) and −34 V / +40 V (Pulse 3a/Pulse 3b) per test data for adjacent variants - confirming design suitability for CAN/LIN bus node protection and power supply input stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum continuous reverse operating voltage before conduction; defines safe operating margin below system nominal voltage. |
| VBR (min/max) | 24.4 V / 26.9 V - Breakdown threshold range at 1 mA test current; ensures reliable turn-on above VWM with process tolerance. |
| VC @ IPPM (10/1000 μs) | 35.5 V at 84.5 A - Clamping voltage during 10/1000 μs surge; determines maximum stress imposed on protected ICs. |
| PPPM | 3000 W - Peak pulse power rating for 10/1000 μs waveform; supports high-energy load dump and switching transients. |
| ESD Rating | ±30 kV (IEC 61000-4-2, contact/air) - Enables direct interface protection without external series impedance in sensor modules. |
| TJ max. | +175 °C - Maximum junction temperature; allows operation in under-hood automotive environments with minimal derating. |
| RthJA | 90 °C/W - Junction-to-ambient thermal resistance on FR4; informs heatsinking requirements for sustained surge duty cycles. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, AEC-Q101 qualified; matte tin-plated leads, MSL Level 1, 260 °C reflow peak.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (marked end) | Reference terminal for bidirectional clamping | No functional polarity marking on bidirectional types; terminals are symmetrical - either lead serves as anode/cathode depending on transient polarity. |
| Anode (unmarked end) | Reference terminal for bidirectional clamping | Identical electrical behavior to cathode; device conducts equally in both directions above VBR magnitude. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating DC lines without polarity concerns - reduces BOM count vs. dual-unidirectional solutions. |
| 30 kW surge capability (8/20 μs) | Supports high-current lightning-induced surges per IEC 61000-4-5; clamps at 48.2 V (622 A), limiting downstream voltage overshoot in telecom power interfaces. |
| AEC-Q101 qualification | Validates reliability for automotive powertrain and body electronics; includes temperature cycling, HTRB, and ESD stress testing beyond standard JEDEC requirements. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 3b); contributes to sub-35 V clamping at 84.5 A (10/1000 μs). |
| UL 497B recognition (E136766) | Confirms safety compliance for telecom and industrial signal line protection; eliminates need for separate safety certification in end equipment. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump and inductive switching spikes per ISO 16750-2 Pulse b and ISO 7637-2 Pulse 1/2a. IC Role / Device Role / Timing Role: Shunt TVS placed upstream of DC-DC converter input to clamp transients before regulation stage. Use Value: Limits peak voltage to ≤37 V during Pulse 2a, preventing overvoltage failure of 40 V-rated input capacitors and controllers. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) connected to microcontrollers in factory automation PLCs. IC Role / Device Role / Timing Role: Bidirectional clamping element on differential or single-ended signal traces exposed to ESD and cable discharge events. Use Value: Withstands ±30 kV contact ESD per IEC 61000-4-2 while maintaining <1 μA leakage at 22 V, preserving signal integrity and ADC accuracy. |
| Telecom DC Power Input Protection | Automotive CAN Bus Node Protection |
Use Scenario: Securing 48 V telecom power supplies against lightning-induced surges per IEC 61000-4-5 (8/20 μs waveform). IC Role / Device Role / Timing Role: Primary surge suppressor at power entry point, coordinated with upstream fuses and downstream MOVs. Use Value: Delivers 48.2 V clamping at 622 A (8/20 μs), enabling use with 60 V-rated rectifiers and reducing required voltage margin by 12 V vs. legacy 60 V TVS. |
Use Scenario: Protecting CANH/CANL lines in automotive gateways and ADAS ECUs against coupled transients from nearby high-power actuators. IC Role / Device Role / Timing Role: Low-capacitance (typ. 200 pF at 0 V) bidirectional TVS placed across differential pair near connector. Use Value: Clamps common-mode surges to <40 V without distorting 1 Mbps CAN signaling, meeting OEM EMC immunity targets per CISPR 25 Class 5. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22CA | Lower PPPM (400 W), higher RthJA (150 °C/W), same SMC package but non-AEC-Q101 rated. | Not qualified for automotive under-hood use; suitable only for commercial-grade industrial controls. | Select SMAJ22CA only when AEC-Q101 and 3000 W surge capability are not required - reduces cost but sacrifices automotive robustness. |
| 1.5KE22CA | Through-hole DO-201 package, 1500 W PPPM, higher clamping voltage (39.4 V at 38.1 A), no AEC-Q101 or UL 497B. | Requires PCB real estate and wave soldering; incompatible with automated SMT assembly and high-density layouts. | Choose 1.5KE22CA only for legacy through-hole designs or prototyping where SMT placement is unavailable - avoid for new automotive or telecom production. |
Compared with SMAJ22CA and 1.5KE22CA, SMC3K22CAHM3_A delivers triple the surge power, automotive-grade reliability, and surface-mount efficiency - making it the sole option for AEC-Q101-compliant 12 V/24 V systems requiring sub-36 V clamping at >80 A.
Availability
SMC3K22CAHM3_A is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface development, and telecom power entry protection requiring stable component supply, long-term lifecycle support, and traceable AEC-Q101 sourcing.
Supply support for SMC3K22CAHM3_A 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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The SMC3KxxCAHM3_A series was engineered specifically for AEC-Q101-compliant transient suppression in harsh automotive environments - emphasizing low clamping voltage, high surge current capability, and zero-defect manufacturing for safety-critical systems.
FAQ
What is the clamping voltage of SMC3K22CAHM3_A under a 10/1000 μs surge?
The SMC3K22CAHM3_A clamps to 35.5 V at 84.5 A under a 10/1000 μs waveform, as specified in the Vishay datasheet (Document Number: 98241). This value represents the maximum voltage seen across the protected circuit during that standardized surge event, ensuring downstream components rated for ≥40 V remain within safe operating limits. The SMC3K22CAHM3_A achieves this via low incremental resistance and optimized silicon geometry.
Is SMC3K22CAHM3_A qualified for automotive applications?
Yes, SMC3K22CAHM3_A is AEC-Q101 qualified, meaning it has passed rigorous stress tests including high-temperature reverse bias, temperature cycling, and ESD per JESD22 standards - specifically validated for under-hood and chassis-mounted automotive electronics. Its qualification covers the full operating temperature range of −55 °C to +175 °C and confirms reliability for 15+ year vehicle lifecycles.
What package does SMC3K22CAHM3_A use, and is it compatible with standard SMT processes?
SMC3K22CAHM3_A uses the SMC (DO-214AB) surface-mount package, with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards. It meets MSL Level 1 with a 260 °C peak reflow profile, making it fully compatible with standard lead-free SMT assembly lines without moisture sensitivity concerns or special baking requirements.
How does SMC3K22CAHM3_A perform under IEC 61000-4-2 ESD testing?
SMC3K22CAHM3_A withstands ±30 kV contact discharge and ±30 kV air discharge per IEC 61000-4-2, verified in Vishay's characterization labs. Its low clamping voltage and picosecond response ensure sensitive downstream circuitry - such as CAN transceivers or ADC front-ends - experiences less than 35 V overshoot during ESD events, preserving functionality without latch-up or parametric shift.
What is the maximum junction temperature rating for SMC3K22CAHM3_A?
The SMC3K22CAHM3_A has a maximum junction temperature (TJ max.) of +175 °C, enabling reliable operation in high-ambient environments like engine control units or industrial motor drives. This rating is supported by its thermal resistance of 90 °C/W (junction-to-ambient) on standard FR4 PCBs, allowing designers to calculate safe power dissipation margins using actual board layout and airflow conditions.
SMC3K22CAHM3_A/H 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMC3K22CAHM3_A/H FAQ
1.How can I place an order for SMC3K22CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC3K22CAHM3_A/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 SMC3K22CAHM3_A/H reliable?
The price and inventory of SMC3K22CAHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC3K22CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMC3K22CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC3K22CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC3K22CAHM3_A/H?
SMC3K22CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC3K22CAHM3_A/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 SMC3K22CAHM3_A/H?
For technical support, including SMC3K22CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC3K22CAHM3_A/H requirements.
6.How does Aetrix verify that SMC3K22CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMC3K22CAHM3_A/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 SMC3K22CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMC3K22CAHM3_A/H?
All SMC3K22CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMC3K22CAHM3_A/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 SMC3K22CAHM3_A/H part is unused and in its original packaging.
Return procedure for SMC3K22CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC3K22CAHM3_A/H 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 …
