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Vishay General Semiconductor - Diodes Division P6SMB22AHM3_A/I
- Part No.:
- P6SMB22AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB22AHM3_A/I.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,708
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Product details
Overview
P6SMB22AHM3_A/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 a 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 power supply input stages.
For engineers reviewing the P6SMB22AHM3_A/I datasheet, P6SMB22AHM3_A/I pinout, P6SMB22AHM3_A/I application, or P6SMB22AHM3_A/I equivalent, key selection criteria include clamping voltage margin vs. protected IC VDD, unidirectional polarity alignment with DC rail orientation, AEC-Q101 qualification status, and thermal resistance (RθJA = 100 °C/W) under PCB pad constraints.
Technical Context
This TVS operates as a silicon avalanche diode with glass-passivated junction, triggering conduction when reverse voltage exceeds VBR (20.9–23.1 V), limiting transient energy via low incremental surge resistance and fast response (<1 ns). Its unidirectional configuration requires cathode connection to the protected line's higher-potential side.
Rated for 150 °C max junction temperature and compliant with J-STD-020 MSL Level 1 (260 °C peak reflow), the device supports automated SMT placement and meets halogen-free, RoHS-compliant requirements per HM3 suffix. The "_A/I" ordering code denotes 13" tape-and-reel packaging (3200 units) with AEC-Q101 qualification for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 18.8 V - Maximum continuous reverse operating voltage before leakage exceeds 1 μA; sets upper limit for normal DC rail operation. |
| VBR (Breakdown) | 20.9–23.1 V at 1 mA - Voltage range where avalanche conduction initiates; defines minimum overvoltage threshold for clamping action. |
| VC (Clamping) | 30.6 V at 19.6 A - Maximum voltage seen by protected circuit during 10/1000 μs transient; must stay below downstream IC absolute maximum rating. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 μs waveform; determines survivability against common ESD and load-dump events. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; informs derating above 25 °C ambient. |
| TJ max | +150 °C - Maximum allowable junction temperature; constrains sustained power dissipation and pulse repetition rate. |
| AEC-Q101 | Qualified - Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces per stress test requirements. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002. Cathode indicated by band marking; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | High-side terminal in unidirectional configuration | Connected to the line being protected (e.g., +12 V rail); conducts avalanche current toward ground during overvoltage event. |
| Anode (unmarked end) | Low-side terminal | Typically tied to system ground or return path; completes clamping loop and establishes reference for VWM/VBR specification. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Withstands automotive load-dump surges (ISO 7637-2 Pulse 5a) without degradation when mounted per recommended pad layout. |
| Halogen-free, RoHS-compliant (HM3) | Meets EU Directive 2011/65/EU and JEDEC J-STD-20D; eliminates brominated flame retardants while maintaining UL 94 V-0 flammability rating. |
| AEC-Q101 qualified (_B/_D variants) | P6SMB22AHM3_A/I uses HM3_B variant - certified for temperature cycling, HTRB, and mechanical shock tests required for automotive under-hood use. |
| Fast response time (<1 ns) | Clamps transients before sensitive logic or analog circuitry sustains damage; critical for protecting CAN/LIN bus transceivers and MCU I/O pins. |
| Low incremental surge resistance | Minimizes VC overshoot during high-current pulses, improving margin between clamped voltage and protected device's absolute maximum rating. |
Applications
| Automotive Sensor Protection | Industrial Power Input Stage |
|---|---|
Use Scenario: Protecting 5 V or 12 V sensor supply rails (e.g., pressure, temperature, position sensors) from ISO 16750-2 load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor VCC and GND, acting as last-line voltage clamp ahead of LDO or DC-DC converter input. Use Value: Clamps 30.6 V at 19.6 A, ensuring downstream regulator remains within its 36 V absolute maximum input rating during 100 ms load-dump events. |
Use Scenario: Safeguarding AC-DC adapter or DC-DC converter inputs against lightning-induced surges and switching noise in factory automation PLCs. IC Role / Device Role / Timing Role: Primary transient suppressor on main DC bus (e.g., 24 V distribution), coordinated with upstream MOVs and downstream filtering. Use Value: 600 W pulse rating and 100 °C/W thermal resistance enable reliable operation on minimal copper area, reducing BOM count vs. multi-stage protection. |
| Consumer USB Port ESD Protection | Telecom Line Interface |
Use Scenario: Secondary-level ESD protection on USB 2.0 VBUS line in portable devices, supplementing internal port controller clamps. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing ±15 kV contact discharge (IEC 61000-4-2) before energy reaches USB PHY or power switch. Use Value: 18.8 V VWM avoids false triggering during 5.25 V nominal VBUS tolerance, while 30.6 V VC stays below USB switch overvoltage threshold. |
Use Scenario: Overvoltage protection on RS-485 or Ethernet PHY power rails exposed to induced surges in building cabling environments. IC Role / Device Role / Timing Role: Rail clamp on isolated DC-DC output powering communication transceivers, placed after isolation barrier but before signal conditioning. Use Value: AEC-Q101 qualification ensures long-term stability in temperature-cycled telecom cabinets; SMB footprint allows dense layout near connector entry points. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A-E3/5B | Same VWM/VBR/VC specs, but SMA package (DO-214AC); RθJA = 125 °C/W; no AEC-Q101 option. | Limited to commercial-temperature industrial or consumer use; not rated for automotive under-hood environments. | Select when cost sensitivity outweighs thermal performance and automotive qualification needs. |
| 1.5SMC22AHE3_A | Same electrical specs, but SMC (DO-214AB) package; larger footprint (7.11 × 6.22 mm vs. SMB's 4.57 × 3.94 mm); RθJA = 75 °C/W. | Better thermal performance enables higher pulse repetition rates; requires more PCB area and may conflict with tight layout constraints. | Choose when sustained surge duty cycle exceeds P6SMB22AHM3_A/I capability and board space permits larger package. |
Compared with SMAJ22A-E3/5B and 1.5SMC22AHE3_A, P6SMB22AHM3_A/I delivers optimal balance of automotive qualification, compact SMB footprint, and validated 600 W pulse handling - making it preferred for space-constrained, thermally moderate, and automotive-grade designs where AEC-Q101 compliance is mandatory.
Availability
P6SMB22AHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial power supplies, and telecom interface protection requiring stable component supply, AEC-Q101 traceability, and halogen-free compliance.
Supply support for P6SMB22AHM3_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 application-specific validation.
The P6SMB Series targets robust transient suppression in automotive, industrial, and communications systems - engineered for high-energy surge immunity, automated assembly compatibility, and long-term stability under thermal cycling.
FAQ
What is the clamping voltage of P6SMB22AHM3_A/I at its rated peak pulse current?
The P6SMB22AHM3_A/I has a maximum clamping voltage (VC) of 30.6 V at 19.6 A peak pulse current (IPPM) under 10/1000 μs waveform conditions. This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during transient events. Engineers must verify that this clamping level remains below the absolute maximum rating of downstream components such as regulators or microcontrollers in the P6SMB22AHM3_A/I application.
Is P6SMB22AHM3_A/I qualified for automotive applications?
Yes, P6SMB22AHM3_A/I is AEC-Q101 qualified - specifically using the HM3_B variant denoted in Vishay's ordering nomenclature. This qualification covers stress tests including high-temperature reverse bias, temperature cycling, and mechanical shock, validating suitability for automotive subsystems like body control modules and ADAS sensor interfaces. The "_A/I" suffix confirms 13" tape-and-reel packaging with full automotive traceability documentation for the P6SMB22AHM3_A/I device.
What does the "HM3" suffix mean in P6SMB22AHM3_A/I?
The "HM3" suffix in P6SMB22AHM3_A/I indicates halogen-free, RoHS-compliant construction meeting JEDEC J-STD-20D moisture sensitivity level 1 (MSL 1) and UL 94 V-0 flammability rating. It distinguishes this version from commercial-grade "E3" (RoHS only) and "M3" (halogen-free/RoHS) variants. Combined with the "_B" revision code implied by AEC-Q101 qualification, HM3 confirms the P6SMB22AHM3_A/I part meets automotive environmental and safety requirements.
How does the SMB package of P6SMB22AHM3_A/I compare thermally to larger packages like SMC?
The SMB (DO-214AA) package used in P6SMB22AHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W on standard 0.2" × 0.2" copper pads, versus ~75 °C/W for the larger SMC (DO-214AB) package. This means the P6SMB22AHM3_A/I requires stricter thermal management under repetitive surge conditions. However, its smaller footprint enables denser layouts - a key advantage in space-constrained automotive ECUs where the P6SMB22AHM3_A/I is commonly deployed.
Can P6SMB22AHM3_A/I be used in bidirectional configurations?
No, P6SMB22AHM3_A/I is a unidirectional TVS diode, identifiable by its cathode band marking and specified VWM/VBR parameters for reverse-biased operation only. For bidirectional protection, Vishay offers CA-suffixed variants (e.g., P6SMB22CA). Using P6SMB22AHM3_A/I in bidirectional circuits risks forward conduction during negative transients and invalidates its published clamping performance - always match polarity type to system architecture in the P6SMB22AHM3_A/I design-in process.
P6SMB22AHM3_A/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:
- Obsolete
- 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_A/I FAQ
1.How can I place an order for P6SMB22AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB22AHM3_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 P6SMB22AHM3_A/I reliable?
The price and inventory of P6SMB22AHM3_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 P6SMB22AHM3_A/I is usually 5 days.
3.What payment methods are accepted for P6SMB22AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB22AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB22AHM3_A/I?
P6SMB22AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB22AHM3_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 P6SMB22AHM3_A/I?
For technical support, including P6SMB22AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB22AHM3_A/I requirements.
6.How does Aetrix verify that P6SMB22AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All P6SMB22AHM3_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 P6SMB22AHM3_A/I meets industry standards.
7.What is the process for return or replacement of P6SMB22AHM3_A/I?
All P6SMB22AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB22AHM3_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 P6SMB22AHM3_A/I part is unused and in its original packaging.
Return procedure for P6SMB22AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB22AHM3_A/I Tags
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