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Vishay General Semiconductor - Diodes Division SMBJ22AHE3_A/I
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- Part No.:
- SMBJ22AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ22AHE3_A/I.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMBJ22AHE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the 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 (IPPM), and 600 W peak pulse power (10/1000 µs waveform).
For engineers reviewing the SMBJ22AHE3_A/I datasheet, SMBJ22AHE3_A/I pinout, SMBJ22AHE3_A/I application, or SMBJ22AHE3_A/I equivalent, this device is selected for robust overvoltage protection in automotive-grade power rails, industrial sensor interfaces, and DC input stages where AEC-Q101 qualification, low clamping voltage, and fast response time are critical.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, 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 reliable operation in high-ambient environments without forced cooling.
The SMBJ22AHE3_A/I delivers 600 W peak pulse power per 10/1000 µs waveform at TA = 25 °C, with derating above 25 °C per Figure 2 of the datasheet. It exhibits 0.096 %/°C temperature coefficient of VBR and ≤1.0 µA reverse leakage at VWM - enabling precise voltage thresholding in precision analog and microcontroller I/O protection circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 22 V - Maximum continuous reverse voltage before significant leakage; defines safe operating margin below clamping onset. |
| VBR (Breakdown Voltage) | 24.4–26.9 V at IT = 1 mA - Avalanche conduction initiates within this band, ensuring predictable turn-on during transients. |
| VC (Clamping Voltage) | 35.5 V at IPPM = 16.9 A - Limits voltage seen by protected circuit during 600 W surge, reducing stress on downstream ICs. |
| PPPM (Peak Pulse Power) | 600 W (10/1000 µs) - Sustains high-energy transients common in automotive load-dump and industrial motor-switching events. |
| IFSM (Surge Current) | 100 A (8.3 ms half-sine) - Withstands single-event high-current surges without degradation, supporting ruggedized power inputs. |
| TJ max. | +150 °C - Enables deployment in under-hood automotive and industrial control cabinets without thermal derating penalties. |
| AEC-Q101 Qualified | Yes - Validated for automotive electronic systems per stress-test requirements, including temperature cycling and HTRB. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, matte tin-plated leads, MSL Level 1 (JEDEC J-STD-020), RoHS-compliant and halogen-free (HE3 suffix denotes AEC-Q101 qualification).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when V > VBR, clamping voltage to VC. |
| Anode | Reference/ground return | Typically tied to system ground or low-impedance return path; completes clamping loop during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables protection against high-energy transients in 12 V/24 V automotive and industrial power rails without external heat sinking. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive applications including engine control units, body electronics, and ADAS sensor modules. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage overshoot during clamping, preserving margin for 3.3 V/5 V logic and MOSFET gate drivers. |
| Glass-passivated junction | Ensures long-term stability of VBR and leakage performance across temperature and humidity stress cycles. |
| MSL Level 1, 260 °C reflow compatible | Supports standard lead-free PCB assembly without moisture sensitivity concerns or pre-bake requirements. |
Applications
| Automotive Power Input Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs from load-dump transients (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground, clamping surges within nanoseconds. Use Value: Limits voltage to ≤35.5 V during 16.9 A transients, preventing damage to LDOs, microcontrollers, and CAN transceivers. |
Use Scenario: Shielding 4–20 mA current-loop sensors and RS-485 nodes from ESD and field-induced surges in factory automation. IC Role / Device Role / Timing Role: Standoff-rated TVS on signal lines, activated only during overvoltage events without loading normal operation. Use Value: <1.0 µA leakage at 22 V ensures minimal impact on loop accuracy; fast response preserves signal integrity. |
| DC-DC Converter Input Stage | Microcontroller GPIO Protection |
|
Use Scenario: Safeguarding buck converter inputs against back-EMF from relay coils and solenoid drivers in embedded power supplies. IC Role / Device Role / Timing Role: Primary overvoltage clamp upstream of input capacitors and controller ICs. Use Value: 600 W rating absorbs repetitive switching surges; 150 °C max junction temperature supports compact heatsink-free designs. |
Use Scenario: Guarding exposed MCU pins (e.g., reset, UART, ADC inputs) against human-body-model (HBM) ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS (typ. <100 pF) placed directly at connector entry point. Use Value: Clamps 8 kV HBM pulses to <35.5 V within <1 ns, preventing latch-up and permanent gate oxide damage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22AHM3_A/I | Halogen-free variant with identical electrical specs and AEC-Q101 qualification; same SMB package and pinout. | No functional difference; selected when halogen-free compliance is mandated by OEM environmental policies. | Direct material substitution where RoHS + halogen-free certification is required; no design or layout change needed. |
| SMCJ22AHE3_A/I | Higher 1500 W peak pulse power (same VWM/VBR/VC), larger SMC (DO-214AB) package, higher IPPM (38.1 A). | Better suited for higher-energy threats (e.g., ISO 16750-2 long-duration surges); requires larger PCB footprint. | Choose when system-level testing reveals insufficient margin with 600 W rating; verify board space and thermal layout. |
Compared with SMBJ22AHE3_A/I, SMBJ22AHM3_A/I offers identical protection performance with halogen-free construction, while SMCJ22AHE3_A/I provides 2.5× higher surge energy handling at the cost of increased size and thermal mass - enabling tiered design flexibility across automotive and industrial platforms.
Availability
SMBJ22AHE3_A/I is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and DC-DC converter input protection requiring stable component supply and AEC-Q101 compliance.
Supply support for SMBJ22AHE3_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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and automotive-grade validation.
The SMBJ series is part of Vishay's TRANSZORB® TVS portfolio, engineered specifically for high-reliability transient suppression in harsh environments - including automotive, industrial, and telecom infrastructure applications.
FAQ
What is the clamping voltage of SMBJ22AHE3_A/I at its rated peak pulse current?
The SMBJ22AHE3_A/I has a maximum clamping voltage (VC) of 35.5 V at a peak pulse current (IPPM) of 16.9 A, measured using the standardized 10/1000 µs waveform. This value defines the upper voltage limit imposed on the protected circuit during a full-rated transient event and is confirmed in the Electrical Characteristics table of Vishay document 88392. The SMBJ22AHE3_A/I maintains this clamping performance across its operational temperature range.
Is SMBJ22AHE3_A/I suitable for automotive applications?
Yes, SMBJ22AHE3_A/I is AEC-Q101 qualified, as indicated by the "HE3" suffix in its ordering code. It has undergone stress testing for temperature cycling, high-temperature reverse bias, and accelerated life validation per automotive reliability standards. The SMBJ22AHE3_A/I is commonly deployed in engine control units, body control modules, and infotainment power supplies where sustained operation up to +150 °C and immunity to load-dump transients are required.
What does the "A/I" suffix mean in SMBJ22AHE3_A/I?
The "A/I" suffix in SMBJ22AHE3_A/I specifies packaging and reel configuration: "A" denotes the revision level (per Vishay's internal revision coding), and "I" indicates 13-inch diameter plastic tape-and-reel packaging with a base quantity of 3200 units. This format supports automated SMT placement and is documented in the Ordering Information section of Vishay document 88392. The SMBJ22AHE3_A/I is fully compatible with standard pick-and-place equipment calibrated for SMB (DO-214AA) devices.
How does SMBJ22AHE3_A/I differ from bidirectional variants like SMBJ22CA?
The SMBJ22AHE3_A/I is unidirectional, meaning it conducts only in reverse bias (cathode-to-anode) and blocks forward current - ideal for DC power rail protection. In contrast, SMBJ22CA is bidirectional, offering symmetrical clamping in both polarities for AC signal lines or floating buses. The SMBJ22AHE3_A/I has a defined cathode band for polarity orientation, while SMBJ22CA has no marking. Their VBR and VC values differ due to structural asymmetry, and they are not interchangeable without circuit review.
What is the thermal resistance of SMBJ22AHE3_A/I, and how does it affect layout?
The SMBJ22AHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on the minimum recommended 0.2" × 0.2" copper pads per terminal, as specified in Vishay document 88392. This value assumes no additional heatsinking; increasing pad area or adding thermal vias reduces RθJA. For continuous power dissipation near its 5.0 W rating, PCB layout must allocate sufficient copper area - but for transient-only use (e.g., surge protection), thermal mass is less critical than for the SMBJ22AHE3_A/I's intended application.
SMBJ22AHE3_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:
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ22AHE3_A/I FAQ
1.How can I place an order for SMBJ22AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ22AHE3_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 SMBJ22AHE3_A/I reliable?
The price and inventory of SMBJ22AHE3_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 SMBJ22AHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMBJ22AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ22AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ22AHE3_A/I?
SMBJ22AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ22AHE3_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 SMBJ22AHE3_A/I?
For technical support, including SMBJ22AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ22AHE3_A/I requirements.
6.How does Aetrix verify that SMBJ22AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMBJ22AHE3_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 SMBJ22AHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMBJ22AHE3_A/I?
All SMBJ22AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ22AHE3_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 SMBJ22AHE3_A/I part is unused and in its original packaging.
Return procedure for SMBJ22AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ22AHE3_A/I Tags
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