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Vishay General Semiconductor - Diodes Division SMBJ22CAHM3_A/I
- Part No.:
- SMBJ22CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ22CAHM3_A/I.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,864
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Product details
Overview
SMBJ22CAHM3_A/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal and power lines. It features a 22 V stand-off voltage (VWM), 24.4–26.9 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 μs), and clamps to ≤35.5 V at 16.9 A peak surge current - deployed in industrial sensor interfaces and automotive ECUs.
For engineers reviewing the SMBJ22CAHM3_A/I datasheet, SMBJ22CAHM3_A/I pinout, SMBJ22CAHM3_A/I application, or SMBJ22CAHM3_A/I equivalent, this page delivers verified electrical specs, bidirectional clamping behavior, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), and halogen-free RoHS-compliant construction per Vishay Document 88392 (Rev. 09-Jan-2024).
Technical Context
This TVS operates symmetrically in both directions, with identical VBR min/max (24.4 V / 26.9 V), ID ≤1.0 μA at VWM = 22 V, and VC = 35.5 V at IPPM = 16.9 A. Its low incremental surge resistance and fast response time (<1 ns) enable effective suppression of ESD, lightning-induced surges, and inductive switching transients.
Rated for TJ = –55 °C to +150 °C, it uses glass-passivated junction technology and meets MSL Level 1 (JEDEC J-STD-020) with 260 °C reflow peak. The HM3 suffix confirms halogen-free, RoHS-compliant, and AEC-Q101 qualified construction - validated for automotive-grade reliability without derating up to 125 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 24.4 V / 26.9 V at IT = 1 mA - guaranteed breakdown window defining turn-on threshold |
| VC @ IPPM | 35.5 V at 16.9 A (10/1000 μs) - clamped voltage seen by protected circuit during worst-case surge |
| PPPM | 600 W - peak transient energy absorption capability under standardized surge waveform |
| ID @ VWM | ≤1.0 μA - leakage current level ensuring minimal standby power loss and signal integrity |
| RθJA | 100 °C/W - thermal resistance from junction to ambient on standard 0.2" × 0.2" copper pads |
| TJ max. | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetrical terminal configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals function identically; conducts surge current in either direction when |V| > VBR |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| AEC-Q101 qualification | Validated for automotive electronics including engine control, body modules, and ADAS sensors |
| Halogen-free & RoHS-compliant (HM3) | Meets global environmental compliance requirements and JEDEC JESD201 Class 2 whisker resistance |
| 600 W peak pulse power (10/1000 μs) | Handles IEC 61000-4-5 Level 4 surges (4 kV line-to-line, 2 kV line-to-ground) with margin |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage stress on downstream ICs such as CAN transceivers or ADC front-ends |
Applications
| Automotive Sensor Interface | Industrial RS-485 Bus Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine bay environments subject to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS clamping transient energy before it reaches the sensor's output amplifier or microcontroller ADC input. Use Value: Maintains signal fidelity under 100 V/10 ms load dump events while surviving repeated exposure per AEC-Q101 stress testing. |
Use Scenario: Safeguarding differential data lines in factory automation PLCs exposed to ground bounce and EFT bursts. IC Role / Device Role / Timing Role: Low-capacitance (CJ ≈ 100 pF at 0 V) bidirectional clamp placed across RS-485 A/B terminals. Use Value: Prevents bus lockup during 4 kV EFT (IEC 61000-4-4) without distorting 10 Mbps signal edges due to controlled clamping voltage. |
| Consumer USB Port ESD Protection | Telecom DSL Line Surge Suppression |
Use Scenario: Secondary-level protection on VBUS and D+/D− lines of USB 2.0 ports in set-top boxes and smart displays. IC Role / Device Role / Timing Role: Fast-response TVS absorbing ±15 kV contact ESD (IEC 61000-4-2) after primary polymer-based suppressors. Use Value: Limits voltage excursion to <35.5 V, preventing latch-up in USB transceivers rated for 5.5 V absolute maximum. |
Use Scenario: Primary surge protection on twisted-pair DSL lines entering residential gateways exposed to lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Bidirectional clamp shunting surge current between tip/ring and ground, coordinated with gas discharge tube (GDT) upstream. Use Value: Withstands 600 W peak pulse (10/1000 μs) per ITU-T K.20/21, enabling robust 100-year lightning strike survivability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22CAHE3_A/I | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs HM3) | Lacks halogen-free certification required for some automotive Tier 1 supply chains | Select when halogen-free compliance is not mandated and cost optimization is prioritized |
| SMAJ22CAHM3_A/I | Lower PPPM (400 W vs 600 W); same VWM/VBR/VC; SMA package (smaller footprint, higher RθJA) | Not suitable for high-energy surges exceeding 400 W; limited thermal margin in sealed enclosures | Choose only if board space is constrained and surge threat level is limited to IEC 61000-4-5 Level 2 |
Compared with SMBJ22CAHE3_A/I and SMAJ22CAHM3_A/I, SMBJ22CAHM3_A/I uniquely combines AEC-Q101 qualification, halogen-free construction, and 600 W surge capacity in the SMB footprint - making it the preferred choice for automotive and industrial designs requiring full compliance and margin.
Availability
SMBJ22CAHM3_A/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, and telecom line cards requiring stable component supply with long-term lifecycle assurance.
Supply support for SMBJ22CAHM3_A/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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMBJ series targets high-reliability transient suppression in harsh environments - engineered for automotive, industrial, and telecom systems where surge immunity and long-term stability are critical.
FAQ
What is the clamping voltage of SMBJ22CAHM3_A/I at its rated peak pulse current?
The SMBJ22CAHM3_A/I clamps to a maximum of 35.5 V when subjected to its rated peak pulse current of 16.9 A under the 10/1000 μs waveform. This value is measured per Vishay Document 88392 and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring compatibility with 3.3 V or 5 V logic interfaces downstream of the SMBJ22CAHM3_A/I.
Is SMBJ22CAHM3_A/I suitable for automotive applications?
Yes, SMBJ22CAHM3_A/I is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction validated for automotive use. It operates reliably from –55 °C to +150 °C junction temperature and meets MSL Level 1 reflow requirements - making it appropriate for engine control units, body electronics, and ADAS sensor modules where transient immunity and long-term reliability are mandatory.
How does the bidirectional design of SMBJ22CAHM3_A/I affect its PCB layout?
The SMBJ22CAHM3_A/I has no polarity marking and functions identically in both directions, simplifying PCB layout by eliminating orientation constraints. It can be placed across any two nodes requiring symmetrical overvoltage protection - such as differential signal pairs (RS-485, CAN) or AC-coupled analog paths - without concern for anode/cathode alignment, reducing assembly errors and enabling automated placement flexibility.
What is the maximum leakage current of SMBJ22CAHM3_A/I at its stand-off voltage?
At its 22 V stand-off voltage (VWM), the SMBJ22CAHM3_A/I exhibits a maximum reverse leakage current (ID) of 1.0 μA at 25 °C, per Vishay Document 88392. This ultra-low leakage ensures minimal impact on high-impedance sensor circuits or battery-powered systems where standby current must remain below 10 μA - preserving signal accuracy and extending operational life.
Does SMBJ22CAHM3_A/I require a heatsink for standard operation?
No external heatsink is required for SMBJ22CAHM3_A/I under typical surge conditions, as its thermal resistance (RθJA = 100 °C/W) is specified for mounting on standard 0.2" × 0.2" copper pads. Continuous power dissipation is limited to 5.0 W, but transient events are short-duration; sustained operation remains within safe junction limits up to +125 °C ambient when using recommended pad layout - consistent with Vishay's thermal characterization in Document 88392.
SMBJ22CAHM3_A/I 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/I FAQ
1.How can I place an order for SMBJ22CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ22CAHM3_A/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 SMBJ22CAHM3_A/I reliable?
The price and inventory of SMBJ22CAHM3_A/I 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/I is usually 5 days.
3.What payment methods are accepted for SMBJ22CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ22CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ22CAHM3_A/I?
SMBJ22CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ22CAHM3_A/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 SMBJ22CAHM3_A/I?
For technical support, including SMBJ22CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ22CAHM3_A/I requirements.
6.How does Aetrix verify that SMBJ22CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMBJ22CAHM3_A/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 SMBJ22CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMBJ22CAHM3_A/I?
All SMBJ22CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ22CAHM3_A/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 SMBJ22CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMBJ22CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ22CAHM3_A/I Tags
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