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Vishay General Semiconductor - Diodes Division P6SMB22AHM3_B/I
- Part No.:
- P6SMB22AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB22AHM3_B/I.pdf
- Description:
- 600W,22V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:9,772
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Product details
Overview
P6SMB22AHM3_B/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 22 V standoff voltage (VWM), 23.1 V maximum breakdown voltage (VBR), 30.6 V clamping voltage at 19.6 A peak pulse current, and 600 W peak pulse power capability with 10/1000 μs waveform - deployed in automotive sensor protection and industrial I/O interface circuits.
For engineers reviewing the P6SMB22AHM3_B/I datasheet, P6SMB22AHM3_B/I pinout, P6SMB22AHM3_B/I application, or P6SMB22AHM3_B/I equivalent, key selection criteria include its AEC-Q101 qualification, unidirectional polarity with cathode band marking, low incremental surge resistance, and compliance with J-STD-020 MSL level 1 (260 °C reflow peak).
Technical Context
This TVS diode operates as a clamping device that diverts transient energy to ground when reverse voltage exceeds VBR (20.9–23.1 V), limiting downstream voltage to ≤30.6 V at 19.6 A. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), critical for protecting MOSFET gates and microcontroller I/O pins against ESD and inductive switching spikes.
Thermally, it exhibits RθJA = 100 °C/W and RθJL = 20 °C/W, enabling reliable operation up to TJ = 150 °C. The halogen-free, RoHS-compliant HM3 suffix confirms compliance with JESD201 Class 2 whisker resistance and UL 94 V-0 molding compound flammability rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 18.8 V - Maximum continuous reverse operating voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR (Breakdown) | 20.9–23.1 V at 1 mA - Voltage range where device enters avalanche conduction; tight tolerance supports predictable protection onset. |
| VC (Clamping) | 30.6 V at IPPM = 19.6 A - Peak voltage seen by protected circuit during 10/1000 μs transient; determines maximum stress on downstream components. |
| PPPM | 600 W - Peak pulse power handling per 10/1000 μs waveform; enables robust suppression of lightning-induced surges and relay coil kickback. |
| IR (Leakage) | 1.0 μA max at VWM - Ultra-low reverse leakage preserves signal integrity and battery life in always-on sensor interfaces. |
| TJ max | 150 °C - Maximum junction temperature; supports under-hood automotive use and high-ambient industrial environments. |
| 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, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD22-B102. Cathode indicated by band marking on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to protected line (e.g., 24 V rail or CAN_H); conducts during positive transients when used in reverse-biased configuration. |
| Cathode | Clamping reference / ground reference | Connected to system ground or low-impedance return path; establishes clamping voltage relative to ground during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Handles high-energy transients like ISO 7637-2 Pulse 5a without degradation - suitable for 24 V automotive power rail protection. |
| AEC-Q101 qualified (HM3_B/I) | Validated for automotive applications including engine control units and ADAS sensor modules requiring long-term reliability under thermal cycling. |
| Low clamping ratio (VC/VBR ≈ 1.32) | Minimizes overvoltage stress on protected ICs - critical for safeguarding 3.3 V or 5 V logic inputs connected via series resistors. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns - eliminates pre-bake requirement for SMT assembly. |
| Halogen-free & RoHS-compliant | Meets environmental compliance mandates for industrial and automotive OEMs; JESD201 Class 2 whisker resistance ensures long-term solder joint integrity. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine bay environments exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamping transient overvoltages on 0–5 V or 4–20 mA output lines before they reach ADC input or op-amp buffer stages. Use Value: Prevents latch-up or permanent damage to precision analog front-ends while maintaining <1 μA leakage to avoid offset error in measurement circuits. |
Use Scenario: Shielding digital input channels of programmable logic controllers from inductive kickback generated by solenoid valve switching. IC Role / Device Role / Timing Role: Fast-response voltage clamp placed across optocoupler input or Schmitt trigger input to suppress >1 kV transients within nanoseconds. Use Value: Eliminates false triggering and extends service life of isolation barriers without adding RC filtering delay to real-time control loops. |
| Telecom Power Supply Rail | Consumer USB Port ESD Protection |
Use Scenario: Safeguarding +12 V and +48 V DC-DC converter outputs in telecom base station power distribution boards. IC Role / Device Role / Timing Role: Primary-level TVS placed at converter output to absorb repetitive surges from hot-swap events and nearby lightning coupling. Use Value: Maintains regulated output stability during 600 W transient events, avoiding brownout resets and ensuring uninterrupted data transmission uptime. |
Use Scenario: Frontline ESD protection for USB 2.0 data lines (D+/D−) and VBUS in smart home hubs and portable media players. IC Role / Device Role / Timing Role: Low-capacitance unidirectional clamp on VBUS line to shunt ±15 kV contact ESD pulses per IEC 61000-4-2 without distorting signal integrity. Use Value: Achieves pass/fail compliance at Level 4 without degrading USB eye diagram or increasing bit error rate due to minimal parasitic capacitance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A-E3/5B | Same VWM (18.8 V), VC = 33.2 V at 18.1 A; lower PPPM (400 W); non-AEC-Q101; SMA package (larger footprint, higher RθJA). | Not qualified for automotive; suited for cost-sensitive consumer or industrial designs where space allows larger package. | Select when AEC-Q101 is not required and PCB layout permits SMA footprint; verify thermal derating at elevated ambient temperatures. |
| 1.5SMC22AHE3_A/H | Same VWM/VC specs; 1500 W PPPM; DO-214AB (SMC) package; higher thermal mass but larger board area; AEC-Q101 qualified. | Used where higher surge immunity is needed (e.g., heavy-duty industrial motor drives), accepting larger footprint and higher cost. | Choose when system-level surge testing exceeds IEC 61000-4-5 Level 4; requires revised pad layout and reflow profile validation. |
Compared with SMAJ22A-E3/5B, P6SMB22AHM3_B/I offers superior automotive qualification and tighter thermal performance in a smaller SMB footprint; versus 1.5SMC22AHE3_A/H, it trades peak surge capacity for compactness and lower assembly cost - ideal for space-constrained AEC-Q101 designs.
Availability
P6SMB22AHM3_B/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O terminals, and telecom power supply rails requiring stable component supply, AEC-Q101 compliance, and consistent SMB package form factor.
Supply support for P6SMB22AHM3_B/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, TVS devices, and power MOSFETs with emphasis on reliability, efficiency, and application-specific optimization.
The P6SMB Series targets high-reliability transient suppression in automotive, industrial, and telecom systems - engineered for fast clamping, low leakage, and robust surge handling in surface-mount formats.
FAQ
What is the clamping voltage of P6SMB22AHM3_B/I at its rated peak pulse current?
The P6SMB22AHM3_B/I has a maximum clamping voltage (VC) of 30.6 V at 19.6 A peak pulse current (IPPM), measured under the standard 10/1000 μs waveform. This value defines the upper voltage limit imposed on protected circuitry during transient events and is confirmed in the Vishay P6SMB datasheet revision 09-Jan-2024, page 2. The P6SMB22AHM3_B/I maintains this clamping performance across its full operating temperature range.
Is P6SMB22AHM3_B/I suitable for automotive applications?
Yes, P6SMB22AHM3_B/I is AEC-Q101 qualified, as indicated by the "HM3_B" suffix in its ordering code. It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias, and ESD per AEC-Q101 requirements. The P6SMB22AHM3_B/I is explicitly recommended for engine control, body electronics, and ADAS sensor protection where reliability under thermal and electrical stress is mandatory.
What does the "_B/I" suffix mean in P6SMB22AHM3_B/I?
The "_B" denotes AEC-Q101 qualification for the P6SMB22AHM3_B/I series (covering 6.8 V to 220 V variants), while "_I" specifies packaging in 13-inch diameter plastic tape and reel with 3200 units per reel. This format supports high-volume SMT assembly and is documented in the Vishay P6SMB ordering information table (page 3, document 88370). The P6SMB22AHM3_B/I meets JESD201 Class 2 whisker resistance and UL 94 V-0 flammability standards.
How does P6SMB22AHM3_B/I compare to bidirectional TVS diodes like P6SMB22CA?
P6SMB22AHM3_B/I is unidirectional and features a cathode band marking, intended for DC line protection where polarity is fixed (e.g., +12 V rail to ground). In contrast, P6SMB22CA is bidirectional with no polarity marking and symmetric clamping in both directions - used for AC lines or differential signals like RS-485. The P6SMB22AHM3_B/I offers identical VWM and VC specs in the forward direction but cannot replace P6SMB22CA in AC-coupled applications without circuit redesign.
What is the thermal resistance of P6SMB22AHM3_B/I, and how does it affect layout design?
The P6SMB22AHM3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead resistance (RθJL) of 20 °C/W, measured on 0.2" × 0.2" copper pads. To maintain TJ ≤ 150 °C under 600 W pulse conditions, PCB layout must provide adequate copper area and minimize trace length to ground. The P6SMB22AHM3_B/I datasheet recommends minimum pad dimensions of 0.086" × 0.060" per terminal for optimal thermal performance.
P6SMB22AHM3_B/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- P6SMB, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 18.8V
- Voltage - Breakdown (Min):
- 20.9V
- Voltage - Clamping (Max) @ Ipp:
- 30.6V
- Current - Peak Pulse (10/1000µs):
- 19.6A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
P6SMB22AHM3_B/I FAQ
1.How can I place an order for P6SMB22AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB22AHM3_B/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 P6SMB22AHM3_B/I reliable?
The price and inventory of P6SMB22AHM3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB22AHM3_B/I is usually 5 days.
3.What payment methods are accepted for P6SMB22AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB22AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB22AHM3_B/I?
P6SMB22AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB22AHM3_B/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 P6SMB22AHM3_B/I?
For technical support, including P6SMB22AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB22AHM3_B/I requirements.
6.How does Aetrix verify that P6SMB22AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All P6SMB22AHM3_B/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 P6SMB22AHM3_B/I meets industry standards.
7.What is the process for return or replacement of P6SMB22AHM3_B/I?
All P6SMB22AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB22AHM3_B/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 P6SMB22AHM3_B/I part is unused and in its original packaging.
Return procedure for P6SMB22AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB22AHM3_B/I Tags
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