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Vishay General Semiconductor - Diodes Division SMBJ22AHM3/H
- Part No.:
- SMBJ22AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ22AHM3/H.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,049
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Product details
Overview
SMBJ22AHM3/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping fast-rising ESD and surge transients on power and signal lines. It features 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 (IPPM), and 600 W peak pulse power (10/1000 µs waveform), targeting protection of MOSFETs, ICs, and sensor interfaces in industrial and automotive electronics.
For engineers reviewing the SMBJ22AHM3/H datasheet, SMBJ22AHM3/H pinout, SMBJ22AHM3/H application, or SMBJ22AHM3/H equivalent, key selection criteria include its AEC-Q101 qualification (HM3 suffix), halogen-free RoHS compliance, 150 °C max junction temperature, low incremental surge resistance, and suitability for automated SMT placement on PCBs with 0.2" × 0.2" copper pads per terminal.
Technical Context
This TVS diode operates as a unidirectional clamping device: under normal bias it presents high impedance up to 22 V reverse stand-off (VWM), then rapidly transitions to low-impedance conduction when transient voltage exceeds its 24.4–26.9 V breakdown threshold (VBR). Its 35.5 V clamping voltage at 16.9 A ensures downstream circuitry remains below safe voltage limits during 10/1000 µs surges.
Thermal performance is defined by 100 °C/W junction-to-ambient thermal resistance (RθJA) and 20 °C/W junction-to-lead (RθJL), enabling reliable operation up to 150 °C junction temperature. The HM3 suffix confirms halogen-free, RoHS-compliant construction with matte tin-plated leads meeting J-STD-002 solderability and JESD201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 24 V nominal systems. |
| VBR (min/max) | 24.4 V / 26.9 V at 1 mA - Confirmed breakdown range ensuring predictable turn-on across production lot and temperature. |
| VC @ IPPM | 35.5 V at 16.9 A - Clamping voltage under standardized 10/1000 µs surge; determines maximum stress seen by protected IC or MOSFET. |
| PPPM | 600 W - Peak pulse power handling capability with 0.01% duty cycle; supports repetitive surge events in motor drive or relay switching. |
| TJ max. | +150 °C - Maximum junction temperature rating enabling use in under-hood automotive or high-ambient industrial environments. |
| Package | SMB (DO-214AA) - Surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height; compatible with standard SMT reflow profiles. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, unidirectional polarity indicated by cathode band. Terminals are matte tin-plated leads suitable for J-STD-002 soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to ground or low-side reference; completes clamping loop during transient event. |
| Cathode | Reverse-biased terminal / Protected line connection | Connected to line being protected (e.g., 24 V rail or sensor output); blocks DC but conducts surge to ground. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges without degradation over rated lifetime. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for EU, China RoHS, and JEITA standards without compromising surge performance. |
| Low profile SMB package | 0.220" × 0.160" footprint enables dense PCB layouts while maintaining thermal dissipation via 0.2" × 0.2" copper pads. |
| Fast response time & low clamping ratio | Sub-nanosecond response and VC/VBR ≈ 1.42 ensure minimal overvoltage exposure to sensitive downstream components. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate drivers and microcontrollers from inductive kickback during MOSFET/IGBT switching in BLDC motor controllers. IC Role / Device Role / Timing Role: Unidirectional TVS placed between high-side switch drain and ground to clamp flyback spikes. Use Value: Limits transient voltage to ≤35.5 V, preventing latch-up or oxide breakdown in 3.3 V/5 V logic and gate drivers operating from 24 V rails. |
Use Scenario: Safeguarding LIN bus transceivers and microcontroller I/O pins against load dump and jump-start surges in door modules and lighting controls. IC Role / Device Role / Timing Role: Standoff-rated TVS on 12 V supply input and LIN signal line to absorb 10/1000 µs transients per ISO 7637-2. Use Value: Maintains system uptime by preventing reset or damage during 35 V/100 ms load dump events through controlled clamping behavior. |
| Industrial Sensor Signal Conditioning | Telecom Power Supply Inputs |
|
Use Scenario: Shielding analog front-end amplifiers and ADC inputs in pressure/temperature sensors exposed to ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS on differential sensor outputs (e.g., 4–20 mA loop or RS-485) to suppress sub-100 ns ESD pulses. Use Value: Preserves signal integrity with <10 pF junction capacitance at zero bias, avoiding bandwidth reduction in kHz-range sensor signals. |
Use Scenario: Primary-stage surge suppression on AC/DC converter inputs in PoE-powered network switches and base station power supplies. IC Role / Device Role / Timing Role: Front-end unidirectional TVS on rectified DC bus to absorb lightning-induced surges before bulk capacitors and regulators. Use Value: Handles 600 W peak power with 150 °C TJ rating, supporting continuous operation in enclosed telecom enclosures up to 70 °C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22AHE3/H | Same electrical specs (VWM = 22 V, VC = 35.5 V), but RoHS-compliant commercial grade (E3) without halogen-free certification. | Lacks halogen-free compliance; not approved for automotive AEC-Q101 applications. | Select SMBJ22AHE3/H only for non-automotive commercial designs where halogen content is unrestricted. |
| SMAJ22A-M3/H | Lower peak pulse power (400 W vs. 600 W), same VWM/VC, SMA (DO-214AC) package with smaller footprint (4.57 mm × 2.62 mm). | Reduced surge margin; unsuitable for IEC 61000-4-5 Level 3 or automotive load dump. | Choose SMAJ22A-M3/H only when board space is critical and surge threat level is limited to ESD or low-energy transients. |
Compared with SMBJ22AHE3/H and SMAJ22A-M3/H, SMBJ22AHM3/H uniquely combines AEC-Q101 qualification, halogen-free compliance, and full 600 W surge capability in the SMB package-making it the only option qualified for demanding automotive and industrial power-line protection where both reliability and regulatory compliance are mandatory.
Availability
SMBJ22AHM3/H is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, industrial sensor signal conditioning, and telecom power supply inputs requiring stable component supply with guaranteed long-term sourcing.
Supply support for SMBJ22AHM3/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, rectifiers, and protection devices with emphasis on reliability, precision, and application-specific optimization.
The SMBJ series was engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where AEC-Q101 qualification, thermal robustness, and repeatable clamping performance are essential.
FAQ
What is the maximum clamping voltage of SMBJ22AHM3/H under surge conditions?
The SMBJ22AHM3/H has a maximum clamping voltage (VC) of 35.5 V when subjected to its rated peak pulse current of 16.9 A using the standard 10/1000 µs waveform. This value is measured at the device terminals under specified test conditions and ensures protected circuits remain within safe voltage limits during transient events. The SMBJ22AHM3/H maintains this clamping performance across its full operating temperature range and lifetime when mounted per recommended pad layout.
Is SMBJ22AHM3/H suitable for automotive applications?
Yes, SMBJ22AHM3/H is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction validated for automotive use. It meets requirements for temperature cycling, high-temperature reverse bias, and ESD immunity required in body control modules, lighting systems, and sensor interfaces. The SMBJ22AHM3/H is explicitly listed in Vishay's AEC-Q101 qualified product matrix for transient suppression in 12 V and 24 V vehicle networks.
What does the "HM3" suffix mean in SMBJ22AHM3/H?
The "HM3" suffix in SMBJ22AHM3/H denotes halogen-free, RoHS-compliant commercial-grade construction with AEC-Q101 qualification. It specifies matte tin-plated leads meeting J-STD-002 solderability, JESD201 Class 2 whisker resistance, and UL 94 V-0 molding compound. This distinguishes it from E3 (RoHS but not halogen-free) and HE3 (AEC-Q101 + RoHS but not halogen-free) variants. The "H" indicates 7" tape-and-reel packaging (750 units per reel).
How does SMBJ22AHM3/H compare to bidirectional TVS diodes like SMBJ22CA?
SMBJ22AHM3/H is unidirectional and intended for DC-biased lines such as power rails or single-ended signal paths, whereas SMBJ22CA is bidirectional for AC-coupled or symmetrical signal lines like RS-485. The SMBJ22AHM3/H offers lower leakage (<1 µA at 22 V) and higher surge current capability in one polarity, while SMBJ22CA provides identical clamping in both directions but with doubled ID limit for VWM ≤10 V. For 24 V DC systems, SMBJ22AHM3/H is preferred due to superior DC blocking and tighter VBR tolerance.
What PCB layout guidance applies to SMBJ22AHM3/H for optimal thermal performance?
For optimal thermal performance, SMBJ22AHM3/H must be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in the Vishay datasheet. These pads provide the 100 °C/W RθJA thermal resistance used in derating calculations. Avoid narrow traces between pads and ground planes; use multiple thermal vias under pads if internal layers are used for heat spreading. The SMBJ22AHM3/H achieves rated 600 W pulse power only when mounted per this layout-reduced pad area increases junction temperature and degrades surge endurance.
SMBJ22AHM3/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:
- 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/H FAQ
1.How can I place an order for SMBJ22AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ22AHM3/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 SMBJ22AHM3/H reliable?
The price and inventory of SMBJ22AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ22AHM3/H is usually 5 days.
3.What payment methods are accepted for SMBJ22AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ22AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ22AHM3/H?
SMBJ22AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ22AHM3/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 SMBJ22AHM3/H?
For technical support, including SMBJ22AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ22AHM3/H requirements.
6.How does Aetrix verify that SMBJ22AHM3/H is sourced from the original manufacturer or authorized distributors?
All SMBJ22AHM3/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 SMBJ22AHM3/H meets industry standards.
7.What is the process for return or replacement of SMBJ22AHM3/H?
All SMBJ22AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ22AHM3/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 SMBJ22AHM3/H part is unused and in its original packaging.
Return procedure for SMBJ22AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ22AHM3/H Tags
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