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Vishay General Semiconductor - Diodes Division SMBJ22AHM3_A/H
- Part No.:
- SMBJ22AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ22AHM3_A/H.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,174
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Product details
Overview
SMBJ22AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. 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.
For engineers reviewing the SMBJ22AHM3_A/H datasheet, SMBJ22AHM3_A/H pinout, SMBJ22AHM3_A/H application, or SMBJ22AHM3_A/H equivalent, key selection criteria include clamping performance under 16.9 A surge, thermal resistance (RθJA = 100 °C/W), AEC-Q101 qualification status, halogen-free RoHS compliance, and compatibility with automated SMT placement on PCBs with 5.0 mm × 5.0 mm copper pads per terminal.
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. Its 10/1000 µs surge response delivers sub-nanosecond turn-on time and low incremental surge resistance, enabling effective suppression of fast-rising transients on DC power rails and signal lines.
The SMBJ22AHM3_A/H is rated for continuous operation from –55 °C to +150 °C junction temperature, with derating above 25 °C ambient per Figure 2. It meets MSL Level 1 per J-STD-020, supports peak forward surge current (IFSM) of 100 A (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 reverse working voltage before clamping begins; defines safe operating range for 24 V nominal systems. |
| VBR @ IT = 1 mA | 24.4–26.9 V - Breakdown voltage range confirming reliable avalanche initiation within specification tolerance. |
| VC @ IPPM = 16.9 A | 35.5 V - Clamped voltage during 600 W transient; limits downstream IC stress to ≤35.5 V under worst-case surge. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 µs waveform; validates protection capability against IEC 61000-4-5 Level 4 surges. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance; requires minimum 5.0 mm × 5.0 mm copper pad per terminal for rated power dissipation. |
| IFSM | 100 A - Non-repetitive forward surge rating (8.3 ms half-sine); supports robustness against inrush or fault currents in power supply inputs. |
| TJ max. | +150 °C - Maximum junction temperature; enables use in under-hood automotive and industrial environments without derating. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Polarity indicated by cathode band; anode and cathode terminals are axially oriented along the body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to lower-potential side of protected circuit (e.g., GND or return path) | Enables unidirectional clamping from cathode to anode; must be routed to reference plane with low-inductance path. |
| Cathode | Current exit point in forward bias; marked with band; connected to higher-potential side (e.g., VIN, signal line) | Defines clamping direction: transients above VWM divert from cathode to anode, limiting voltage seen by downstream components. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing-enables use in ADAS, infotainment, and body control modules. |
| 600 W peak pulse power (10/1000 µs) | Provides certified surge immunity per IEC 61000-4-5 Ed. 3 (Level 4: 4 kV line-earth, 2 kV line-line) without external series impedance. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage exposure during clamping-critical for protecting 3.3 V/5 V logic interfaces and MOSFET gate drivers. |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free reflow profiles without moisture sensitivity concerns-eliminates bake requirements pre-assembly. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Fulfills EU Directive 2011/65/EU and JEDEC JS709E material restrictions-required for export to EU, Japan, and South Korea markets. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: 24 V battery-fed ECUs exposed to load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and GND, upstream of DC-DC converter input. Use Value: Limits transient voltage to ≤35.5 V, preventing damage to 40 V-rated input MOSFETs and maintaining system uptime during engine cranking events. |
Use Scenario: Analog output lines (e.g., 4–20 mA current loop) from pressure sensors in factory automation PLCs. IC Role / Device Role / Timing Role: TVS mounted directly at connector interface, shunting ESD (IEC 61000-4-2 ±8 kV contact) and EFT (IEC 61000-4-4 ±2 kV) energy. Use Value: Clamps transients within 1 ns, preserving <1 LSB error in 16-bit ADC readings and avoiding false trip in safety-critical monitoring loops. |
| Telecom DC Power Feeds | Consumer USB-C Power Delivery Lines |
|
Use Scenario: -48 V telecom rectifier outputs feeding base station RF amplifiers and backhaul interfaces. IC Role / Device Role / Timing Role: Primary surge clamp on -48 V rail, coordinated with secondary MOV and fuse for staged protection. Use Value: Absorbs 600 W surges without degradation, extending field life beyond 10 years in outdoor cabinet deployments with high lightning exposure. |
Use Scenario: VBUS line in USB-C PD 3.0 sink designs supporting up to 20 V/5 A (100 W). IC Role / Device Role / Timing Role: Secondary-level TVS after primary OVP, guarding against hot-plug transients and adapter fault conditions. Use Value: Withstands repeated 10/1000 µs surges up to 16.9 A while maintaining VC ≤35.5 V-ensuring USB PD controller remains functional during adapter swaps. |
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_A/H | Same electrical specs (VWM, VBR, VC, PPPM), but RoHS-compliant commercial grade (not halogen-free); no AEC-Q101 qualification. | Approved for industrial/commercial equipment only; not suitable for automotive OEM or Tier 1 programs requiring AEC-Q101. | Select when halogen content and automotive qualification are not required; lower cost for non-automotive BOMs. |
| SMAJ22A-HF | Same VWM and VC, but lower PPPM = 400 W; SMA package (smaller footprint, higher RθJA = 140 °C/W). | Limited to lower-energy transients (e.g., IEC 61000-4-5 Level 2); unsuitable for load dump or high-power telecom feeds. | Choose only for space-constrained consumer designs where 400 W surge margin is sufficient and thermal budget allows. |
Compared with SMBJ22AHM3_A/H, SMBJ22AHE3_A/H lacks halogen-free certification and AEC-Q101 validation-making it inappropriate for automotive use-while SMAJ22A-HF sacrifices 33 % peak power rating and thermal performance due to smaller package size, restricting its deployment to less demanding surge environments.
Availability
SMBJ22AHM3_A/H is available at Aetrix Electronics and suitable for automotive power input protection, industrial sensor signal line protection, and telecom DC power feed applications requiring stable component supply, long-term lifecycle support, and traceable halogen-free sourcing.
Supply support for SMBJ22AHM3_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, efficiency, and application-specific optimization.
The SMBJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in automotive, industrial, and telecom infrastructure-balancing clamping precision, surge robustness, and manufacturability.
FAQ
What is the clamping voltage of SMBJ22AHM3_A/H at its rated peak pulse current?
The SMBJ22AHM3_A/H has a maximum clamping voltage (VC) of 35.5 V at 16.9 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuits during surge events. The SMBJ22AHM3_A/H maintains this clamping performance across its full operating temperature range.
Is SMBJ22AHM3_A/H qualified for automotive applications?
Yes, SMBJ22AHM3_A/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" and documentation in the SMBJ5.0A–SMBJ188A datasheet (Document Number: 88392, Revision: 09-Jan-2024). This qualification covers stress tests including temperature cycling, highly accelerated life testing (HALT), and ESD robustness-making SMBJ22AHM3_A/H suitable for under-hood and chassis-mounted automotive electronics.
What does the "HM3" suffix indicate in SMBJ22AHM3_A/H?
The "HM3" suffix in SMBJ22AHM3_A/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from "HE3" (RoHS-compliant, AEC-Q101, but not halogen-free) and "E3/M3" (commercial-grade, no automotive qualification). The "_A/H" indicates tape-and-reel packaging in 7-inch reels (750 units per reel), per Vishay's ordering information table.
How does SMBJ22AHM3_A/H compare to bidirectional TVS diodes like SMBJ22CA?
SMBJ22AHM3_A/H is unidirectional and intended for DC line protection where polarity is fixed (e.g., VIN-to-GND), offering lower leakage and tighter VBR tolerance than bidirectional variants. In contrast, SMBJ22CA protects AC or polarity-agnostic lines but exhibits higher reverse leakage and symmetric VBR in both directions. SMBJ22AHM3_A/H cannot replace SMBJ22CA in AC-coupled applications without circuit redesign.
What PCB layout guidance applies to SMBJ22AHM3_A/H for optimal surge performance?
For rated 600 W surge handling, Vishay specifies mounting SMBJ22AHM3_A/H on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, with internal ground/power planes connected via multiple vias. Trace inductance must be minimized-keep TVS leads short and direct to protected node and return path. Avoid routing sensitive traces near the TVS body to prevent coupling of clamped energy into adjacent signals.
SMBJ22AHM3_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:
- 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_A/H FAQ
1.How can I place an order for SMBJ22AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ22AHM3_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 SMBJ22AHM3_A/H reliable?
The price and inventory of SMBJ22AHM3_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 SMBJ22AHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMBJ22AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ22AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ22AHM3_A/H?
SMBJ22AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ22AHM3_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 SMBJ22AHM3_A/H?
For technical support, including SMBJ22AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ22AHM3_A/H requirements.
6.How does Aetrix verify that SMBJ22AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ22AHM3_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 SMBJ22AHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ22AHM3_A/H?
All SMBJ22AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ22AHM3_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 SMBJ22AHM3_A/H part is unused and in its original packaging.
Return procedure for SMBJ22AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ22AHM3_A/H Tags
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