My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBJ22AHM3/I
- Part No.:
- SMBJ22AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ22AHM3/I.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,362
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ22AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 22 V stand-off voltage (VWM), 24.4–26.9 V breakdown voltage (VBR) at 1 mA, 35.5 V maximum clamping voltage (VC) at 16.9 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial motor drives.
For engineers reviewing the SMBJ22AHM3/I datasheet, SMBJ22AHM3/I pinout, SMBJ22AHM3/I application, or SMBJ22AHM3/I equivalent, this part delivers verified transient suppression for 24 V DC power rails, automotive body electronics, and I/O protection where AEC-Q101 qualification, low incremental surge resistance, and fast response time (<1 ns) are required.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-banded polarity, leveraging a glass-passivated silicon junction for stable avalanche behavior under repetitive surge conditions. Its thermal resistance (RθJA = 100 °C/W) and junction temperature range (–55 °C to +150 °C) support operation in compact PCB layouts with minimal copper pad area (0.2" × 0.2").
The SMBJ22AHM3/I meets J-STD-020 MSL Level 1, supports 260 °C lead-free reflow, and is halogen-free and RoHS-compliant per Vishay's HM3 suffix designation. It is rated for 100 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine) and exhibits a VBR temperature coefficient of 0.096 %/°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum continuous reverse operating voltage before clamping begins; sets threshold for 24 V nominal systems. |
| VBR (min/max) | 24.4 V / 26.9 V at IT = 1 mA - Confirmed breakdown window ensures reliable turn-on without premature conduction. |
| VC @ IPPM | 35.5 V at 16.9 A - Clamped voltage during 600 W transient limits stress on downstream 3.3 V or 5 V logic. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 µs waveform supports IEC 61000-4-5 Level 4 surge immunity. |
| IPPM | 16.9 A - Peak surge current capability derived from VC and PPPM; validates layout with 5.0 mm × 5.0 mm copper pads. |
| TJ max. | +150 °C - Enables use in under-hood automotive modules and industrial enclosures without derating below 125 °C ambient. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline (5.59 mm × 4.06 mm × 2.44 mm) compatible with automated pick-and-place. |
Pinout & Package
Package: SMB (DO-214AA), molded epoxy case with matte tin-plated leads; cathode indicated by band on one end. Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal per Vishay's thermal specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or lowest potential rail; defines clamping path for positive transients on cathode side. |
| Cathode | Protected line input | Banded terminal connects to 22–24 V supply or signal line; conducts avalanche current to anode during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including body control modules and sensor hubs requiring reliability beyond commercial grade. |
| Halogen-free & RoHS-compliant (HM3) | Meets EU Directive 2011/65/EU and JEDEC J-STD-020 MSL Level 1 for lead-free assembly without brominated flame retardants. |
| 600 W peak pulse power (10/1000 µs) | Supports EN 61000-4-5 surge testing up to 4 kV line-to-ground in 2 Ω/12 Ω coupling networks. |
| Fast response time (<1 ns) | Clamps transients before sensitive CMOS inputs reach destructive voltage levels, preserving data integrity in microcontroller I/O. |
| Low incremental surge resistance | Minimizes VC overshoot during high-di/dt events, reducing energy dissipation in protected circuitry. |
Applications
| Automotive Body Electronics | Industrial Motor Drive Control |
|---|---|
|
Use Scenario: Protecting LIN bus transceivers and door module MCUs from load dump and inductive switching spikes in 12 V/24 V vehicle subsystems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between LIN line and ground to clamp negative transients and suppress positive surges above 22 V. Use Value: Prevents latch-up or gate oxide damage in transceivers by limiting clamped voltage to 35.5 V while surviving 100 A surge pulses. |
Use Scenario: Safeguarding gate drivers and current-sense amplifiers in 24 V DC-fed BLDC motor controllers exposed to back-EMF and relay bounce. IC Role / Device Role / Timing Role: Mounted across VDD rail and GND to absorb 600 W inductive kickback energy within sub-microsecond timescales. Use Value: Enables robust operation without external snubbers by clamping rail voltage to ≤35.5 V during 16.9 A transient events. |
| Telecom Power Interface | Industrial Sensor Signal Conditioning |
|
Use Scenario: Shielding 24 V PoE-powered remote PHY interfaces from lightning-induced surges on outdoor Ethernet links. IC Role / Device Role / Timing Role: First-stage protection on DC input prior to DC/DC converter, configured unidirectionally to block reverse polarity faults. Use Value: Withstands repeated 600 W surges while maintaining VWM = 22 V margin over nominal 24 V supply, ensuring no false triggering. |
Use Scenario: Securing analog outputs of 4–20 mA current-loop sensors connected to PLC analog inputs in factory automation cabinets. IC Role / Device Role / Timing Role: Placed across sensor output and system ground to shunt ESD and switching noise on long field wiring. Use Value: Limits induced transients to 35.5 V, preventing ADC saturation and protecting op-amp front-ends rated for ±36 V absolute maximum. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22AHE3/I | RoHS-compliant but not halogen-free; same electrical specs and AEC-Q101 qualification. | Acceptable for commercial-automotive hybrids where halogen content is unrestricted. | Select when cost sensitivity outweighs halogen-free requirement and full AEC-Q101 compliance is retained. |
| SMBJ22A-M3/5B | Same SMB package and electrical ratings; differs only in packaging format (13" reel, 3200 pcs) and base P/N suffix. | No functional difference; suited for high-volume SMT production with bulk tape-and-reel delivery. | Choose for manufacturing scale-up where logistics compatibility with existing feeder systems is prioritized. |
Compared with SMBJ22AHM3/I, the HE3/I variant omits halogen-free certification but retains identical clamping performance and AEC-Q101 validation, while the M3/5B version offers identical protection capability in a different reel configuration - making SMBJ22AHM3/I the optimal choice when both halogen-free compliance and automotive-grade reliability are mandatory.
Availability
SMBJ22AHM3/I is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor drive control, and telecom power interface designs requiring stable component supply, traceable sourcing, and long-term lifecycle continuity.
Supply support for SMBJ22AHM3/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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series was engineered for high-energy transient suppression in space-constrained, high-reliability environments - particularly targeting automotive, industrial, and telecom infrastructure where consistent clamping and AEC-Q101 validation are critical.
FAQ
What is the maximum clamping voltage of SMBJ22AHM3/I at its rated peak pulse current?
The SMBJ22AHM3/I has a maximum clamping voltage (VC) of 35.5 V at its specified peak pulse current (IPPM) of 16.9 A, measured using a 10/1000 µs waveform. This value is guaranteed per Vishay's datasheet revision 09-Jan-2024 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ22AHM3/I maintains this clamping performance across its full operating temperature range (–55 °C to +150 °C).
Is SMBJ22AHM3/I qualified for automotive applications?
Yes, SMBJ22AHM3/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" and documentation in datasheet 88392. This qualification covers stress tests including high-temperature operating life, temperature cycling, and mechanical shock - validating its suitability for under-hood and chassis-mounted automotive modules. The SMBJ22AHM3/I is explicitly designated for automotive use in Vishay's material categorization and MSL classification.
What does the "HM3" suffix indicate in SMBJ22AHM3/I?
The "HM3" suffix in SMBJ22AHM3/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from E3 (RoHS only) and HE3 (RoHS + AEC-Q101, but not halogen-free). The HM3 marking confirms compliance with JEDEC J-STD-020 MSL Level 1 and maximum lead-free reflow peak temperature of 260 °C - essential for modern automotive and industrial assembly processes.
How does SMBJ22AHM3/I differ from bidirectional TVS diodes like SMBJ22CA?
SMBJ22AHM3/I is unidirectional and functions only against positive transients on its cathode terminal, with a defined polarity band indicating cathode. In contrast, SMBJ22CA is bidirectional and suppresses surges of either polarity, lacking a polarity marking. The SMBJ22AHM3/I exhibits lower leakage at VWM (1.0 µA vs. 2.0 µA for CA variants at same VWM) and supports higher IFSM (100 A vs. N/A for bidirectional types), making it preferred for DC rail protection where reverse conduction is undesirable.
What PCB layout guidance applies to SMBJ22AHM3/I for optimal thermal performance?
Vishay specifies that SMBJ22AHM3/I must be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve its rated 600 W peak pulse power and thermal resistance (RθJA = 100 °C/W). Reducing pad size increases junction temperature rise during surge events and may cause premature failure. The SMBJ22AHM3/I datasheet explicitly ties derating curves and IPPM values to this pad layout - no thermal vias or additional copper are required for baseline compliance.
SMBJ22AHM3/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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- 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)
SMBJ22AHM3/I FAQ
1.How can I place an order for SMBJ22AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ22AHM3/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 SMBJ22AHM3/I reliable?
The price and inventory of SMBJ22AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ22AHM3/I is usually 5 days.
3.What payment methods are accepted for SMBJ22AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ22AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ22AHM3/I?
SMBJ22AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ22AHM3/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 SMBJ22AHM3/I?
For technical support, including SMBJ22AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ22AHM3/I requirements.
6.How does Aetrix verify that SMBJ22AHM3/I is sourced from the original manufacturer or authorized distributors?
All SMBJ22AHM3/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 SMBJ22AHM3/I meets industry standards.
7.What is the process for return or replacement of SMBJ22AHM3/I?
All SMBJ22AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ22AHM3/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 SMBJ22AHM3/I part is unused and in its original packaging.
Return procedure for SMBJ22AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ22AHM3/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
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
