My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBJ22CAHM3_A/H
- Part No.:
- SMBJ22CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ22CAHM3_A/H.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,513
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ22CAHM3_A/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, rated for 22 V standoff voltage (VWM), 35.5 V maximum clamping voltage (VC) at 16.9 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 µs waveform). It protects signal lines and power rails in sensor interfaces, industrial I/O modules, and telecom front-end circuits against ESD and lightning-induced transients.
For engineers reviewing the SMBJ22CAHM3_A/H datasheet, SMBJ22CAHM3_A/H pinout, SMBJ22CAHM3_A/H application, or SMBJ22CAHM3_A/H equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), and halogen-free RoHS-compliant construction per JESD201 Class 2 whisker testing.
Technical Context
This device operates as a voltage-clamped surge protector with symmetrical breakdown in both directions-no polarity marking required. Its glass-passivated junction enables fast response (<1 ns) and low incremental surge resistance, critical for protecting high-speed analog inputs and digital logic from repetitive transients up to 0.01% duty cycle.
The SMBJ22CAHM3_A/H is thermally optimized for PCB mounting on 5.0 mm × 5.0 mm copper pads, delivering 5.0 W steady-state power dissipation at TA = 50 °C and supporting junction temperatures from –55 °C to +150 °C. Its M3 suffix confirms halogen-free, RoHS-compliant molding compound and matte tin-plated leads compliant with J-STD-002 and JESD22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR min/max | 24.4 V / 26.9 V at IT = 1 mA - Confirmed bidirectional breakdown range ensures predictable clamping onset across production lots. |
| VC @ IPPM | 35.5 V at 16.9 A (10/1000 µs) - Clamping voltage directly limits stress on downstream ICs during surge events. |
| PPPM | 600 W - Peak transient power handling capability under standardized surge waveform; validates protection level for IEC 61000-4-5 Level 3. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance determines derating curve above 25 °C ambient; requires minimum pad area for rated performance. |
| TJ max | +150 °C - Maximum junction temperature supports operation in harsh industrial and automotive under-hood environments. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height; compatible with automated pick-and-place. |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration - no cathode/anode marking; symmetrical terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity; no polarity-dependent routing required. |
| Terminal 2 | Anode / Cathode (bidirectional) | Electrically identical to Terminal 1; enables placement flexibility and eliminates orientation constraints on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal paths without polarity awareness or external circuitry. |
| 600 W peak pulse power (10/1000 µs) | Meets IEC 61000-4-5 surge immunity requirements for industrial control and telecom infrastructure applications. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive electronics including body control modules and ADAS sensor interfaces where reliability under thermal cycling is critical. |
| Halogen-free & RoHS-compliant (M3) | Complies with environmental regulations and soldering standards (J-STD-002, JESD22-B102); supports lead-free reflow profiles up to 260 °C peak. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage stress on protected ICs compared to higher-ratio TVS devices, preserving signal integrity during clamping. |
Applications
| Industrial Sensor Interface | Automotive Body Control Module |
|---|---|
|
Use Scenario: Protecting 24 V CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and ground, absorbing transient energy before it reaches the transceiver input stage. Use Value: Limits voltage excursion to ≤35.5 V during 16.9 A surges, preventing latch-up or gate oxide damage in 3.3 V/5 V interface ICs. |
Use Scenario: Safeguarding microcontroller GPIOs and power supply rails in door module ECUs exposed to ISO 7637-2 pulses and ESD events. IC Role / Device Role / Timing Role: Primary transient suppressor on 12 V power rail and LIN signal lines, operating within AEC-Q101-qualified environment. Use Value: Maintains system uptime by surviving >1000 surges at rated conditions while meeting automotive thermal and halogen-free material requirements. |
| Telecom Front-End Protection | Consumer IoT Power Input |
|
Use Scenario: Shielding Ethernet PHY power pins and RS-485 data lines in network switches and base stations from lightning-induced surges. IC Role / Device Role / Timing Role: First-line defense clamping common-mode transients on DC bias rails and differential pairs before conditioning filters. Use Value: Delivers 600 W surge handling with <1 ns response time, ensuring compliance with ITU-T K.21 basic protection level for outdoor equipment. |
Use Scenario: Securing USB-C and barrel jack inputs in smart home hubs and battery-powered gateways against user-handling ESD and adapter surge. IC Role / Device Role / Timing Role: Low-profile TVS placed directly at connector entry point, leveraging SMB footprint for minimal board space usage. Use Value: Provides certified 30 kV air/15 kV contact ESD protection (IEC 61000-4-2) with zero layout redesign due to standard DO-214AA compatibility. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22CAHE3_A/H | Same electrical specs and SMB package, but uses standard RoHS-compliant (E3) molding compound instead of halogen-free (M3). | Not qualified to AEC-Q101; suitable for commercial-grade industrial and consumer designs where automotive qualification is not required. | Select when halogen content is unrestricted and cost optimization is prioritized over automotive compliance. |
| SMAJ22CAHM3_A/H | Lower 400 W peak pulse power rating, same VWM/VC, but in smaller SMA (DO-214AC) package with higher RθJA (140 °C/W). | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 3 or automotive load dump scenarios requiring 600 W. | Choose only if board space is severely constrained and surge threat level is limited to IEC 61000-4-2 ESD or low-duty-cycle switching noise. |
Compared with SMBJ22CAHE3_A/H, the SMBJ22CAHM3_A/H adds halogen-free construction and AEC-Q101 qualification without sacrificing clamping performance; versus SMAJ22CAHM3_A/H, it delivers 50% higher surge power handling and superior thermal management-critical for mission-critical industrial and automotive deployments.
Availability
SMBJ22CAHM3_A/H is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, and telecom front-end protection requiring stable component supply, halogen-free compliance, and AEC-Q101 validation.
Supply support for SMBJ22CAHM3_A/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 is a global leader in discrete semiconductors, specializing in diodes, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMBJ series is designed for robust transient suppression in harsh environments-including automotive, industrial automation, and telecom infrastructure-where consistent clamping, thermal stability, and regulatory compliance are non-negotiable.
FAQ
What does the "CA" suffix mean in SMBJ22CAHM3_A/H?
The "CA" suffix denotes a bidirectional configuration: SMBJ22CAHM3_A/H clamps voltage transients equally in both polarities, eliminating the need for polarity-aware placement. This differs from unidirectional variants (e.g., SMBJ22AHM3_A/H), which require correct cathode orientation. The CA version is ideal for AC-coupled signals, differential buses, and applications where voltage polarity reversal may occur.
Is SMBJ22CAHM3_A/H qualified for automotive use?
Yes, SMBJ22CAHM3_A/H is AEC-Q101 qualified, as confirmed by its HM3 suffix and documentation in Vishay's official datasheet (Document Number: 88392, Revision: 09-Jan-2024). This qualification covers stress tests including high-temperature operating life, temperature cycling, and mechanical shock-making SMBJ22CAHM3_A/H suitable for under-hood and cabin electronics in passenger vehicles and commercial fleets.
What is the maximum clamping voltage of SMBJ22CAHM3_A/H under surge conditions?
The maximum clamping voltage (VC) of SMBJ22CAHM3_A/H is 35.5 V at a peak pulse current (IPPM) of 16.9 A, measured using the standardized 10/1000 µs double-exponential waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during worst-case surge events.
How does the HM3 suffix differ from E3 or HE3 in SMBJ22CAHM3_A/H?
The HM3 suffix in SMBJ22CAHM3_A/H indicates halogen-free, RoHS-compliant construction with AEC-Q101 qualification. In contrast, E3 denotes RoHS-compliant but non-halogen-free commercial grade, and HE3 adds AEC-Q101 qualification without halogen-free assurance. Only HM3 satisfies all three criteria: RoHS, halogen-free, and automotive qualification-making SMBJ22CAHM3_A/H appropriate for Tier 1 automotive suppliers with strict material declarations.
Can SMBJ22CAHM3_A/H replace SMBJ22A or SMBJ22CA in existing designs?
No-SMBJ22CAHM3_A/H is not a drop-in replacement for non-HM3 variants. While electrical parameters match the SMBJ22CA family, the HM3 suffix implies AEC-Q101 qualification and halogen-free materials, which may affect reliability validation, thermal profile, and compliance reporting. Replacing requires requalification per IATF 16949 if used in automotive production, and review of soldering profile compatibility due to matte tin plating specifications.
SMBJ22CAHM3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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):
- 16.9A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMB)
SMBJ22CAHM3_A/H FAQ
1.How can I place an order for SMBJ22CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ22CAHM3_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 SMBJ22CAHM3_A/H reliable?
The price and inventory of SMBJ22CAHM3_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 SMBJ22CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMBJ22CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ22CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ22CAHM3_A/H?
SMBJ22CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ22CAHM3_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 SMBJ22CAHM3_A/H?
For technical support, including SMBJ22CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ22CAHM3_A/H requirements.
6.How does Aetrix verify that SMBJ22CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ22CAHM3_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 SMBJ22CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ22CAHM3_A/H?
All SMBJ22CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ22CAHM3_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 SMBJ22CAHM3_A/H part is unused and in its original packaging.
Return procedure for SMBJ22CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ22CAHM3_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 …
