My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMCJ22CAHM3/I
- Part No.:
- SMCJ22CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ22CAHM3/I.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,987
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMCJ22CAHM3/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients up to 1500 W peak pulse power with a 10/1000 μs waveform, 35.5 V maximum clamping voltage at 42.3 A peak pulse current, and 22 V stand-off voltage - deployed for ESD and surge protection on automotive sensor signal lines, industrial I/O ports, and DC power rails.
For engineers reviewing the SMCJ22CAHM3/I datasheet, SMCJ22CAHM3/I pinout, SMCJ22CAHM3/I application, or SMCJ22CAHM3/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, and compatibility with automated SMT assembly on 8.0 mm × 8.0 mm copper pads per terminal.
Technical Context
This device operates as a voltage-clamped crowbar during transient events, leveraging an avalanche breakdown mechanism with a typical breakdown voltage range of 24.4 V to 26.9 V at 1 mA test current. Its bidirectional symmetry ensures identical clamping behavior in both polarities, eliminating polarity marking on the case.
Thermal performance is defined by 75 °C/W junction-to-ambient thermal resistance and 15 °C/W junction-to-lead resistance, enabling reliable operation up to +150 °C junction temperature. It meets J-STD-020 MSL Level 1 and passes JESD201 Class 2 whisker testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VWM) | 22 V - maximum continuous reverse operating voltage before significant leakage begins |
| Breakdown Voltage (VBR) | 24.4 V to 26.9 V at 1 mA - defines onset of avalanche conduction under transient stress |
| Clamping Voltage (VC) | 35.5 V at 42.3 A IPPM - peak voltage seen by protected circuit during 10/1000 μs surge |
| Peak Pulse Power (PPPM) | 1500 W - maximum transient energy absorption capability per single event |
| Package | SMC (DO-214AB) - surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height |
| Qualification | AEC-Q101 qualified - validated for automotive-grade reliability including temperature cycling and HTRB |
| Compliance | Halogen-free, RoHS-compliant (HM3 suffix), UL 94 V-0 molding compound |
Pinout & Package
SMCJ22CAHM3/I uses the standard SMC (DO-214AB) package: two-terminal, symmetrical, unmarked bidirectional configuration with matte tin-plated leads solderable per J-STD-002 and JESD22-B102. No polarity marking is present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; no cathode band - enables bidirectional clamping without orientation constraints |
| Case body | Thermal interface | Exposed metal-free plastic body; heat dissipation relies entirely on PCB copper pads (min. 8.0 mm × 8.0 mm per terminal) |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 1500 W peak pulse rating | Withstands high-energy transients from inductive switching or lightning-induced surges in automotive and industrial environments |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, ADAS sensors, and infotainment interfaces |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ESD > 30 kV) |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and reflow without baking - compatible with standard SMT production lines |
Applications
| Automotive Sensor Protection | Industrial I/O Port Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Standby-mode voltage clamp that activates only during overvoltage events, preserving signal integrity during normal operation. Use Value: Limits transient voltage to ≤35.5 V while absorbing up to 1500 W, preventing latch-up or gate oxide damage in downstream ASICs. | Use Scenario: Safeguarding PLC digital input modules and RS-485 transceivers against field-wiring induced surges and ground-bounce spikes. IC Role / Device Role / Timing Role: Fast-response shunt protector placed directly at connector entry point to divert surge current before reaching controller ICs. Use Value: Clamps within <1 ns to protect 3.3 V/5 V logic interfaces without adding capacitance that degrades signal rise time. |
| DC Power Rail Protection | Consumer Device USB/Charging Port |
Use Scenario: Securing 24 V DC power inputs in factory automation drives and motor controllers against inductive kickback and cross-talk. IC Role / Device Role / Timing Role: Primary overvoltage suppression element placed upstream of DC-DC converters and LDO regulators. Use Value: Maintains 22 V stand-off while clamping to 35.5 V - sufficient margin above nominal rail to avoid false triggering yet low enough to prevent MOSFET avalanche failure. | Use Scenario: Adding secondary-level surge immunity to USB-C PD and legacy 5 V charging ports in smart home hubs and portable medical devices. IC Role / Device Role / Timing Role: Secondary TVS stage after primary common-mode choke, targeting differential-mode transients missed by front-end filtering. Use Value: Bidirectional operation handles both VBUS overvoltage and reversed-polarity plug-in events without requiring dual-device solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22CAHE3/A | Lower PPPM (400 W), SMA package (smaller footprint, higher RθJA = 110 °C/W), same VWM/VBR/VC specs | Not suitable for 1500 W surge events; limited to lower-energy consumer or telecom interfaces | Select when board space is constrained and surge threat level is ≤400 W (e.g., USB 2.0 data lines) |
| SMCJ22AHE3/I | Unidirectional version; includes cathode band marking; otherwise identical electrical specs and package | Requires correct polarity placement; unsuitable for AC or floating signals where polarity reversal may occur | Select only for DC-only rails with fixed polarity and where layout allows orientation control |
Compared with SMCJ22CAHM3/I, SMAJ22CAHE3/A offers smaller size but sacrifices 73% peak power handling, while SMCJ22AHE3/I retains full 1500 W capability but introduces polarity dependency - making SMCJ22CAHM3/I the optimal choice for robust, orientation-agnostic protection in automotive and industrial settings.
Availability
SMCJ22CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and DC power distribution systems requiring stable component supply with long-term lifecycle assurance.
Supply support for SMCJ22CAHM3/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 reliability, efficiency, and application-specific validation.
The SMCJ series targets high-energy transient suppression in harsh environments, engineered specifically for automotive, industrial, and telecom infrastructure where AEC-Q101 qualification and 1500 W surge resilience are mandatory.
FAQ
What does the "HM3" suffix indicate in SMCJ22CAHM3/I?
The HM3 suffix in SMCJ22CAHM3/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It confirms compliance with JEDEC JESD201 Class 2 whisker resistance and UL 94 V-0 flammability rating - critical for automotive and industrial deployments where material safety and long-term reliability are mandated. SMCJ22CAHM3/I meets these requirements out-of-the-box without additional screening.
Is SMCJ22CAHM3/I suitable for protecting 24 V automotive power supplies?
Yes, SMCJ22CAHM3/I is explicitly rated for 22 V stand-off voltage and clamps to 35.5 V at 42.3 A, providing safe margin above nominal 24 V systems while suppressing ISO 16750-2 load-dump transients. Its AEC-Q101 qualification, 1500 W peak pulse rating, and -55 °C to +150 °C operating range make SMCJ22CAHM3/I appropriate for under-hood and chassis-mounted 24 V power rail protection.
How does the bidirectional design of SMCJ22CAHM3/I affect PCB layout?
The bidirectional design of SMCJ22CAHM3/I eliminates polarity marking and orientation constraints - both terminals are functionally identical, allowing placement without regard to anode/cathode direction. This simplifies layout, reduces assembly errors, and supports protection of AC-coupled or floating nodes like differential buses (e.g., CAN, RS-485) where voltage polarity reverses during normal operation. SMCJ22CAHM3/I requires no silkscreen polarity indicator.
What is the thermal derating behavior of SMCJ22CAHM3/I above 25 °C ambient?
SMCJ22CAHM3/I follows standard derating per Figure 2 in Vishay document 88394: peak pulse power decreases linearly above 25 °C ambient, reaching ~50% of 1500 W at +100 °C case temperature. Its RθJA of 75 °C/W means 1 W dissipation raises junction temperature by 75 °C above ambient - so sustained power dissipation must remain below 6.5 W (PD rating) with adequate copper pad area (8.0 mm × 8.0 mm per terminal) to maintain TJ ≤ 150 °C.
Can SMCJ22CAHM3/I be used in place of unidirectional SMCJ22AHE3/I?
SMCJ22CAHM3/I can replace SMCJ22AHE3/I only in circuits where bidirectional clamping is acceptable or required - such as AC signal lines, floating grounds, or systems subject to polarity reversal. It cannot substitute in strictly DC-unidirectional applications where cathode-anode orientation is enforced by circuit topology, as SMCJ22CAHM3/I lacks polarity marking and conducts equally in both directions. Always verify system-level voltage polarity behavior before substitution.
SMCJ22CAHM3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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):
- 42.3A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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)
SMCJ22CAHM3/I FAQ
1.How can I place an order for SMCJ22CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ22CAHM3/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 SMCJ22CAHM3/I reliable?
The price and inventory of SMCJ22CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ22CAHM3/I is usually 5 days.
3.What payment methods are accepted for SMCJ22CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ22CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ22CAHM3/I?
SMCJ22CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ22CAHM3/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 SMCJ22CAHM3/I?
For technical support, including SMCJ22CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ22CAHM3/I requirements.
6.How does Aetrix verify that SMCJ22CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SMCJ22CAHM3/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 SMCJ22CAHM3/I meets industry standards.
7.What is the process for return or replacement of SMCJ22CAHM3/I?
All SMCJ22CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ22CAHM3/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 SMCJ22CAHM3/I part is unused and in its original packaging.
Return procedure for SMCJ22CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ22CAHM3/I 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 …
