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Vishay General Semiconductor - Diodes Division SMB10J22AHM3/I
- Part No.:
- SMB10J22AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J22AHM3/I.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,540
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Product details
Overview
SMB10J22AHM3/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection 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, 1000 W peak pulse power (10/1000 µs), 28.2 A peak pulse current (IPPM), and clamps to ≤35.5 V at rated surge. It is AEC-Q101 qualified and halogen-free, targeting automotive electronics protection.
For engineers reviewing the SMB10J22AHM3/I datasheet, SMB10J22AHM3/I pinout, SMB10J22AHM3/I application, or SMB10J22AHM3/I equivalent, this device is selected for robust overvoltage immunity in 12 V/24 V automotive subsystems, DC power rails, and sensor interface lines where low clamping voltage, fast response (<1 ns), and MSL Level 1 reflow compatibility are critical.
Technical Context
This TVS diode operates as a clamping-type protector: under normal bias it presents high impedance (>1 µA leakage at 22 V), then rapidly avalanches below 35.5 V to divert surge energy away from downstream ICs or MOSFETs. Its glass-passivated junction ensures stable VBR and low incremental surge resistance, enabling consistent clamping across repeated transients.
The SMB10J22AHM3/I is rated for -55 °C to +150 °C operating junction temperature, with thermal resistance RθJA = 72 °C/W (on 5.0 mm × 5.0 mm copper pads) and RθJL = 20 °C/W. It meets JESD201 Class 2 whisker resistance and is qualified per AEC-Q101 for automotive under-hood and body-control module applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 22 V - Maximum continuous reverse working voltage before significant leakage; defines safe operating margin for 12 V/24 V systems. |
| VBR (Breakdown Voltage) | 24.4–26.9 V at 1 mA - Avalanche onset range; ensures reliable triggering above system nominal voltage but below IC absolute maximum ratings. |
| VC (Clamping Voltage) | ≤35.5 V at 28.2 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; enables I/O protection for 3.3 V/5 V logic with external series impedance. |
| PPPM (Peak Pulse Power) | 1000 W - Energy-handling capacity for standardized 10/1000 µs surge waveform; supports ISO 7637-2 Pulse 1/2a/5a compliance in automotive designs. |
| ID (Reverse Leakage) | ≤1.0 µA at 22 V - Negligible standby power loss and minimal impact on high-impedance sensor bias networks. |
| TJ max. | +150 °C - Enables placement near heat sources (e.g., power converters, motor drivers) without derating concerns in engine bay modules. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per AEC stress test plan. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile (max height 2.20 mm), matte tin-plated leads, RoHS-compliant and halogen-free. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground reference terminal | Connected to system ground or low-side return path; forms clamping loop with cathode to shunt surge current to GND. |
| Cathode | Protected line input | Connected to line being protected (e.g., battery rail, CAN bus, sensor supply); avalanche conduction occurs from cathode to anode during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional clamping | Enables asymmetric protection on DC-powered lines (e.g., 12 V battery feed) without forward-conduction interference during normal operation. |
| AEC-Q101 qualification | Validates long-term reliability in automotive environments including thermal cycling (-40 °C to +125 °C), vibration, and humidity exposure. |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes overvoltage overshoot during surge events, reducing stress on downstream MOSFETs, regulators, and microcontroller I/O pins. |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow soldering without pre-baking, simplifying SMT assembly for high-volume automotive PCB production. |
| Glass-passivated junction | Ensures stable VBR tolerance and low leakage over lifetime, critical for safety-critical systems requiring zero latent failure modes. |
Applications
| Automotive Body Control Module (BCM) | Industrial 24 V PLC Input Protection |
|---|---|
|
Use Scenario: Protecting microcontroller GPIO and LIN transceiver inputs from load-dump and inductive switching transients in door module PCBs. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between 12 V supply rail and ground, triggered within <1 ns to limit voltage excursion to ≤35.5 V. Use Value: Prevents latch-up or gate oxide damage in 3.3 V MCU I/Os by ensuring clamped voltage stays below 40 V even under 1000 W surge conditions. |
Use Scenario: Safeguarding digital input channels of programmable logic controllers against field-wiring surges and ESD in factory automation cabinets. IC Role / Device Role / Timing Role: Standoff-rated TVS on 24 V optocoupler input side, absorbing repetitive 1 kV/500 A transients per IEC 61000-4-5 Level 4. Use Value: Maintains signal integrity and extends optocoupler lifetime by limiting reverse voltage across input LED to <35.5 V during surge events. |
| Automotive HVAC Blower Motor Driver | Automotive Rear Camera Power Line |
|
Use Scenario: Suppressing flyback voltage spikes generated by PWM-driven DC brushless blower motors in climate control systems. IC Role / Device Role / Timing Role: Parallel-connected TVS across motor terminals, clamping inductive kickback to protect half-bridge MOSFETs and gate drivers. Use Value: Reduces required MOSFET VDSS rating from 80 V to 45 V, lowering conduction losses and BOM cost while maintaining functional safety. |
Use Scenario: Shielding 12 V power input of rear-view camera modules from jump-start and alternator load-dump transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp on camera power rail, positioned upstream of DC/DC converter to prevent input overvoltage shutdown. Use Value: Ensures uninterrupted video output during 35 V/100 ms load-dump events per ISO 16750-2, avoiding camera blackouts during vehicle startup. |
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 | Same VWM (22 V), VBR (24.4–26.9 V), and PPPM (1000 W), but RoHS-compliant commercial grade (not AEC-Q101 qualified); RθJA = 72 °C/W identical. | Lacks automotive qualification; suitable for industrial/commercial 24 V systems where AEC-Q101 is not mandated. | Select SMBJ22AHE3/A when automotive qualification is unnecessary and cost sensitivity favors non-automotive grade parts. |
| SMAJ22A-HM3 | Lower PPPM (400 W), smaller SMA package (DO-214AC), same VWM/VBR; RθJA = 110 °C/W limits power handling in compact layouts. | Insufficient for ISO 7637-2 Pulse 5a (load dump); limited to lower-energy transients like ESD or signal-line surges. | Choose SMAJ22A-HM3 only for space-constrained, low-surge applications such as USB or CAN FD data lines-not for power rail protection. |
Compared with SMB10J22AHM3/I, SMBJ22AHE3/A offers identical electrical specs but no automotive qualification, while SMAJ22A-HM3 sacrifices 60% surge power capacity and thermal performance for smaller footprint-making SMB10J22AHM3/I the sole choice for AEC-Q101-compliant 1000 W clamping in SMB form factor.
Availability
SMB10J22AHM3/I is available at Aetrix Electronics and suitable for automotive body electronics, industrial 24 V control systems, and camera module power protection requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMB10J22AHM3/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, precision, and automotive-grade validation.
The SMB10JxxA series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power, high-reliability transient suppression in harsh automotive and industrial environments.
FAQ
What is the clamping voltage of SMB10J22AHM3/I at its rated peak pulse current?
The SMB10J22AHM3/I clamps to a maximum of 35.5 V when subjected to its rated peak pulse current of 28.2 A under the standard 10/1000 µs waveform. This value is measured at the device terminals and represents the upper bound voltage imposed on the protected circuit during surge events, directly supporting design margin calculations for downstream components.
Is SMB10J22AHM3/I suitable for protecting CAN bus lines?
No - SMB10J22AHM3/I is unidirectional with a 22 V stand-off voltage and is optimized for DC power rail protection (e.g., 12 V/24 V supplies), not low-voltage differential data lines. For CAN FD or classical CAN, bidirectional TVS diodes with VWM ≤ 15 V (e.g., SMBJ15CA-HM3) are required to avoid interfering with common-mode signaling; using SMB10J22AHM3/I would disrupt bus bias and violate ISO 11898-2.
Does SMB10J22AHM3/I require a heatsink for 1000 W surge handling?
No - the SMB10J22AHM3/I handles 1000 W peak pulse power without a heatsink because the 10/1000 µs surge duration is too short for significant thermal accumulation. Its RθJA = 72 °C/W applies to steady-state dissipation; transient energy is absorbed by the silicon junction and dissipated via PCB copper pads (minimum 5.0 mm × 5.0 mm per terminal), as specified in the Vishay datasheet Figure 2 derating curves.
How does the HM3 suffix affect the SMB10J22AHM3/I specification?
"HM3" denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification - confirming compliance with automotive environmental standards and reliability testing. It does not alter electrical parameters versus the HE3 variant; both share identical VWM, VBR, VC, PPPM, and thermal specs. The HM3 suffix specifically certifies absence of brominated flame retardants and antimony trioxide in the molding compound.
Can SMB10J22AHM3/I be used in parallel for higher surge current capability?
No - paralleling SMB10J22AHM3/I devices is not recommended due to VBR mismatch (24.4–26.9 V range), which causes uneven current sharing and potential thermal runaway. For higher IPPM requirements, select a single higher-rated device (e.g., SM8S22A-HM3, 6600 W) or verify matched-bin parts with <5% VBR spread under controlled surge testing per JEDEC JESD22-A114.
SMB10J22AHM3/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):
- 28.2A
- Power - Peak Pulse:
- 1000W (1kW)
- 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)
SMB10J22AHM3/I FAQ
1.How can I place an order for SMB10J22AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J22AHM3/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 SMB10J22AHM3/I reliable?
The price and inventory of SMB10J22AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB10J22AHM3/I is usually 5 days.
3.What payment methods are accepted for SMB10J22AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J22AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J22AHM3/I?
SMB10J22AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J22AHM3/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 SMB10J22AHM3/I?
For technical support, including SMB10J22AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J22AHM3/I requirements.
6.How does Aetrix verify that SMB10J22AHM3/I is sourced from the original manufacturer or authorized distributors?
All SMB10J22AHM3/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 SMB10J22AHM3/I meets industry standards.
7.What is the process for return or replacement of SMB10J22AHM3/I?
All SMB10J22AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J22AHM3/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 SMB10J22AHM3/I part is unused and in its original packaging.
Return procedure for SMB10J22AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J22AHM3/I Tags
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Diodes Incorporated
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