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Vishay General Semiconductor - Diodes Division P6SMB22CAHM3_A/I
- Part No.:
- P6SMB22CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB22CAHM3_A/I.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,002
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Product details
Overview
P6SMB22CAHM3_A/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the P6SMB series, designed for clamping voltage transients on signal or power lines. It features a 22 V standoff voltage (VWM), 24.5 V minimum breakdown voltage (VBR), 33.2 V maximum clamping voltage (VC) at 19.6 A peak pulse current (IPPM), and 600 W peak pulse power capability with a 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor signal lines in industrial and automotive electronics.
For engineers reviewing the P6SMB22CAHM3_A/I datasheet, P6SMB22CAHM3_A/I pinout, P6SMB22CAHM3_A/I application, or P6SMB22CAHM3_A/I equivalent, key selection criteria include bidirectional clamping behavior, AEC-Q101 qualification status, SMB (DO-214AA) package compatibility, and thermal derating above 25 °C ambient temperature.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical electrical characteristics in forward and reverse directions. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 μA at VWM), while the low incremental surge resistance enables effective clamping under fast-rising transients such as ESD or inductive switching spikes.
The device is rated for 150 °C maximum junction temperature and exhibits a typical thermal resistance of 100 °C/W (junction-to-ambient) on standard 0.2" × 0.2" copper pads. It meets JESD201 Class 2 whisker resistance and MSL Level 1 per J-STD-020, supporting lead-free reflow up to 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 22 V - Maximum continuous reverse voltage before significant conduction begins; defines operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 24.5 V min / 26.7 V max at 1 mA - Voltage at which device enters avalanche conduction; ensures predictable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 33.2 V max at 19.6 A IPPM - Peak voltage seen by protected circuit during 10/1000 μs transient; determines stress on downstream components. |
| PPPM (Peak Pulse Power) | 600 W - Sustained energy absorption capacity under standardized surge waveform; validates robustness against IEC 61000-4-5 level 4 surges. |
| ID (Reverse Leakage) | ≤1.0 μA at 22 V - Minimal standby current draw; preserves signal integrity and battery life in always-on circuits. |
| TJ max | 150 °C - Maximum allowable junction temperature; sets thermal design limits for PCB layout and power cycling. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 5.59 mm × 3.94 mm footprint and 2.20 mm height; compatible with automated placement and reflow. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, UL 94 V-0 rated. Bidirectional construction means no polarity marking; terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals serve identically in either polarity; no cathode band marking required for bidirectional operation. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines without polarity concerns. |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock testing. |
| 600 W peak pulse rating | Supports IEC 61000-4-5 surge immunity up to 4 kV (line-to-earth) in properly designed systems. |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes overvoltage overshoot during transient suppression, reducing stress on protected ICs. |
| MSL Level 1, 260 °C reflow compatible | Eliminates moisture sensitivity handling requirements and supports standard lead-free assembly processes. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential signal pair or supply rail input. Use Value: Limits transient voltage to ≤33.2 V during 10/1000 μs surges, preventing latch-up or gate oxide damage in connected microcontrollers. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to relay coil flyback and motor drive noise. IC Role / Device Role / Timing Role: Parallel-connected TVS on 24 V DC input terminals to shunt induced spikes before reaching optocoupler or Schmitt trigger inputs. Use Value: Absorbs up to 600 W of surge energy without degradation, maintaining long-term reliability in high-noise factory environments. |
| Telecom Line Interface | Consumer Appliance Control Board |
Use Scenario: Shielding Ethernet PHY or RS-485 transceivers from ESD and lightning-induced surges on outdoor-facing ports. IC Role / Device Role / Timing Role: First-line transient suppressor mounted adjacent to connector, before common-mode choke and data line ESD diodes. Use Value: Clamps sub-microsecond ESD events to safe levels within 1 ns response time, preserving signal integrity and bit error rate. |
Use Scenario: Securing microcontroller GPIOs and display backlight drivers in washing machines and HVAC controllers against power supply transients. IC Role / Device Role / Timing Role: Localized TVS on 5 V/3.3 V rails and button input lines to prevent false triggering or reset events. Use Value: Withstands repeated 100 A surge currents (8.3 ms half-sine) without parametric shift, ensuring field longevity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22CA | Same VWM (22 V), lower PPPM (400 W), SMA package (smaller footprint, higher RθJA). | Limited to lower-energy transients; less suitable for industrial 4 kV surge compliance. | Select when board space is constrained and surge threat level is ≤2 kV. |
| SMCJ22CA | Same VWM (22 V), higher PPPM (1500 W), larger SMC package (DO-214AB). | Requires more PCB area but delivers superior energy handling for heavy-duty motor control interfaces. | Choose for applications demanding >600 W surge margin or extended thermal endurance. |
Compared with SMAJ22CA and SMCJ22CA, P6SMB22CAHM3_A/I offers balanced surge capability (600 W), AEC-Q101 qualification, and SMB footprint - making it optimal for automotive and industrial designs where reliability, standardization, and moderate energy absorption are jointly prioritized.
Availability
P6SMB22CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer appliance control boards requiring stable component supply and long-term lifecycle support.
Supply support for P6SMB22CAHM3_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, TVS devices, and power MOSFETs with emphasis on reliability and application-specific performance.
The P6SMB Series is engineered for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where consistent clamping behavior and AEC-Q101 compliance are mandatory.
FAQ
What does the "CA" suffix indicate in P6SMB22CAHM3_A/I?
The "CA" suffix denotes a bidirectional configuration: P6SMB22CAHM3_A/I provides symmetrical clamping in both polarities, unlike unidirectional variants (e.g., P6SMB22AHM3_A/I). This makes it ideal for protecting AC-coupled signals, differential buses like CAN or RS-485, and dual-rail power domains where polarity reversal may occur. The device has no cathode marking and functions identically regardless of terminal orientation.
Is P6SMB22CAHM3_A/I qualified for automotive use?
Yes, P6SMB22CAHM3_A/I is AEC-Q101 qualified, as confirmed by its HM3 suffix and documentation in Vishay's P6SMB datasheet (Rev. 09-Jan-2024). It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias, and mechanical shock - meeting requirements for under-hood and body-control module applications. The "_B" revision code further indicates automotive-grade screening.
What is the maximum clamping voltage of P6SMB22CAHM3_A/I and how is it measured?
The maximum clamping voltage (VC) of P6SMB22CAHM3_A/I is 33.2 V, measured at a peak pulse current (IPPM) of 19.6 A using a 10/1000 μs double-exponential waveform. This value represents the highest voltage the device allows across its terminals during standardized surge conditions - a critical parameter for ensuring protected ICs remain within their absolute maximum ratings. VC is guaranteed across the full operating temperature range.
How does the SMB (DO-214AA) package of P6SMB22CAHM3_A/I compare to SMA or SMC packages?
The SMB package of P6SMB22CAHM3_A/I measures 3.94 mm × 2.20 mm × 2.13 mm and offers a balance between board space efficiency and thermal performance. Compared to the smaller SMA (DO-214AC), SMB provides lower thermal resistance (RθJA = 100 °C/W vs. ~125 °C/W) and higher surge capability. Versus the larger SMC (DO-214AB), SMB sacrifices some power handling (600 W vs. 1500 W) for compactness and compatibility with dense layouts - making P6SMB22CAHM3_A/I well-suited for space-constrained automotive ECUs.
Can P6SMB22CAHM3_A/I be used in place of a unidirectional TVS like P6SMB22AHM3_A/I?
No - P6SMB22CAHM3_A/I is bidirectional and cannot replace a unidirectional TVS in DC-biased applications where reverse conduction must be blocked. For example, on a 24 V supply rail with ground reference, a unidirectional part clamps only positive transients while blocking reverse current; P6SMB22CAHM3_A/I would conduct in both directions, potentially disrupting biasing. Use P6SMB22CAHM3_A/I only where symmetrical protection is required, such as across differential pairs or AC signal paths.
P6SMB22CAHM3_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:
- -
- Bidirectional Channels:
- 1
- 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)
P6SMB22CAHM3_A/I FAQ
1.How can I place an order for P6SMB22CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB22CAHM3_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 P6SMB22CAHM3_A/I reliable?
The price and inventory of P6SMB22CAHM3_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 P6SMB22CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for P6SMB22CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB22CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB22CAHM3_A/I?
P6SMB22CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB22CAHM3_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 P6SMB22CAHM3_A/I?
For technical support, including P6SMB22CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB22CAHM3_A/I requirements.
6.How does Aetrix verify that P6SMB22CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All P6SMB22CAHM3_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 P6SMB22CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of P6SMB22CAHM3_A/I?
All P6SMB22CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB22CAHM3_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 P6SMB22CAHM3_A/I part is unused and in its original packaging.
Return procedure for P6SMB22CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB22CAHM3_A/I Tags
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