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Vishay General Semiconductor - Diodes Division P6SMB20CAHM3_A/I
- Part No.:
- P6SMB20CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB20CAHM3_A/I.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P6SMB20CAHM3_A/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal and power lines. It features 20 V standoff voltage (VWM), 22.2 V minimum breakdown voltage (VBR), 32.4 V maximum clamping voltage (VC) at 19.5 A peak pulse current, and 600 W peak pulse power capability with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial control systems.
For engineers reviewing the P6SMB20CAHM3_A/I datasheet, P6SMB20CAHM3_A/I pinout, P6SMB20CAHM3_A/I application, or P6SMB20CAHM3_A/I equivalent, this part delivers AEC-Q101 qualified transient protection with halogen-free RoHS compliance, MSL Level 1 rating, and verified bidirectional clamping performance across temperature range – critical for ESD and load-switching surge immunity in production-grade embedded designs.
Technical Context
This bidirectional TVS diode operates symmetrically in both polarities, enabling robust protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable leakage (<1.0 μA at 17.1 V) and fast response time (<1.0 ns), while low incremental surge resistance supports consistent clamping under repetitive 0.01% duty-cycle transients.
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. Its SMB package meets UL 94 V-0 flammability and JESD201 Class 2 whisker resistance requirements, supporting automated SMT placement and lead-free reflow up to 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 17.1 V - Maximum continuous reverse voltage before significant conduction; defines operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 22.2 V min / 24.6 V max at 1.0 mA - Confirmed avalanche onset range ensuring predictable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 32.4 V at 19.5 A (10/1000 μs) - Peak voltage seen by protected circuit during worst-case surge; limits stress on downstream components. |
| PPPM (Peak Pulse Power) | 600 W - Sustains high-energy transients such as ISO 7637-2 pulse 1/2b/5a without degradation when mounted per recommended pad layout. |
| IPPM (Peak Pulse Current) | 19.5 A - Maximum non-repetitive surge current handled with specified clamping; derived from VC and waveform standard. |
| TJ max | 150 °C - Enables reliable operation in under-hood automotive or high-temperature industrial enclosures without derating. |
| Package | SMB (DO-214AA) - Standardized 2-pin surface-mount outline with 5.59 mm length, 4.06 mm width, and 2.20 mm height; compatible with JEDEC MS-012. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Cathode/anode terminals are functionally symmetrical; both leads serve as interchangeable surge-current paths.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge current entry (positive half-cycle) | Accepts transient energy during positive voltage excursions; electrically identical to cathode in bidirectional operation. |
| Cathode | Surge current entry (negative half-cycle) | Accepts transient energy during negative voltage excursions; functionally interchangeable with anode due to symmetrical construction. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics per stress test requirements. |
| Halogen-free & RoHS-compliant | Meets IEC 61249-2-21 and JEDEC J-STD-609A Class 1 standards; supports green manufacturing and end-of-life recycling. |
| MSL Level 1 (260 °C) | Enables single-reflow assembly without moisture sensitivity concerns; eliminates bake-out requirement prior to SMT. |
| 600 W 10/1000 μs rating | Provides immunity against ISO 16750-2 load dump surges and IEC 61000-4-5 combination wave transients in industrial power rails. |
| Low leakage & tight VBR tolerance | 1.0 μA max reverse leakage at VWM minimizes standby power loss; ±5% VBR ensures predictable clamping across production lots. |
Applications
| Automotive Sensor Interface Protection | Industrial PLC I/O Module Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load-dump and jump-start induced transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point to shunt surge energy before reaching signal conditioning ICs. Use Value: Maintains signal integrity under ISO 7637-2 Pulse 5a (75 V/300 ms) with <32.4 V clamped voltage, preventing latch-up or damage to 3.3 V/5 V interface ICs. |
Use Scenario: Safeguarding 24 V DC digital input channels in programmable logic controllers against field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Primary transient suppressor on front-end terminal block, operating in parallel with optocoupler input stage. Use Value: Clamps 1 kV/500 A IEC 61000-4-5 surges to ≤32.4 V within <1 ns, preserving input logic thresholds and extending optocoupler lifetime. |
| Consumer Appliance Motor Drive Protection | Telecom Line Card Surge Suppression |
Use Scenario: Shielding microcontroller GPIOs and gate drivers in smart home appliances (e.g., washing machine motor control) from inductive switching noise. IC Role / Device Role / Timing Role: Localized TVS at H-bridge driver output pins to absorb MOSFET turn-off spikes. Use Value: Limits voltage overshoot to 32.4 V during 100 A inductive kickback, preventing gate oxide rupture and ensuring >100,000 cycle reliability. |
Use Scenario: Protecting Ethernet PHY and PoE controller inputs on telecom line cards from lightning-induced common-mode surges on twisted-pair cabling. IC Role / Device Role / Timing Role: Secondary-level bidirectional suppressor after gas discharge tube (GDT), handling residual fast-rising transients. Use Value: Delivers sub-35 V clamping at 10 A with <1 ns response, complementing GDT's high-energy handling while protecting sensitive silicon. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20CA | Same VWM (17.1 V) and VC (32.4 V), but lower PPPM (400 W) and smaller SMA package (higher RθJA = 150 °C/W). | Limited to lower-energy transients (e.g., ESD-only); unsuitable for ISO 7637-2 or IEC 61000-4-5 full-wave testing. | Select when board space is constrained and surge energy is limited to <400 W; verify thermal margin under repeated pulses. |
| 1.5SMC20CA | Same electrical specs but larger SMC (DO-214AB) package (7.11 mm × 6.22 mm), higher PPPM (1500 W), and RθJA = 60 °C/W. | Better thermal performance and higher surge endurance; requires larger PCB footprint and may not fit dense layouts. | Choose for mission-critical automotive or industrial applications requiring >600 W margin or extended pulse repetition capability. |
Compared with SMAJ20CA and 1.5SMC20CA, P6SMB20CAHM3_A/I delivers optimal balance of 600 W surge capacity, SMB footprint compatibility, AEC-Q101 qualification, and halogen-free compliance - making it the preferred choice for space-constrained automotive and industrial designs requiring certified reliability without thermal derating penalties.
Availability
P6SMB20CAHM3_A/I is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC I/O protection, and consumer appliance motor control requiring stable component supply, long-term lifecycle support, and AEC-Q101 validated performance.
Supply support for P6SMB20CAHM3_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 optimization.
The P6SMB Series targets high-reliability transient suppression in automotive, industrial, and telecom systems, delivering standardized 600 W surge capability in compact SMB packages with AEC-Q101 and RoHS compliance built-in.
FAQ
What is the clamping voltage of P6SMB20CAHM3_A/I at its rated peak pulse current?
The P6SMB20CAHM3_A/I has a maximum clamping voltage (VC) of 32.4 V at 19.5 A peak pulse current with a 10/1000 μs waveform. This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuits during surge events. The clamping performance remains stable across the full operating temperature range (-65 °C to +150 °C), and the P6SMB20CAHM3_A/I maintains this specification without degradation under repetitive 0.01% duty cycle pulses.
Is P6SMB20CAHM3_A/I suitable for automotive applications?
Yes, P6SMB20CAHM3_A/I is AEC-Q101 qualified and specifically designed for automotive use, including engine control units, body electronics, and ADAS sensor interfaces. Its halogen-free, RoHS-compliant construction (HM3 suffix), MSL Level 1 rating, and guaranteed performance from -65 °C to +150 °C meet stringent automotive reliability requirements. The P6SMB20CAHM3_A/I has been validated against stress tests including temperature cycling, humidity bias, and mechanical shock per AEC-Q101 Rev D.
How does the bidirectional configuration of P6SMB20CAHM3_A/I affect circuit protection design?
The bidirectional configuration of P6SMB20CAHM3_A/I enables symmetrical clamping for both positive- and negative-going transients without requiring polarity awareness during layout. This simplifies protection of AC-coupled lines, differential buses (e.g., CAN, RS-485), and floating sensor outputs. Unlike unidirectional TVS diodes, the P6SMB20CAHM3_A/I does not require a DC bias path and exhibits identical VBR, VC, and leakage characteristics in either direction - eliminating design ambiguity in dual-polarity surge environments.
What is the thermal resistance of P6SMB20CAHM3_A/I, and how does it impact PCB layout?
The P6SMB20CAHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes standard JEDEC test conditions and directly impacts sustained power dissipation capability. To maintain safe junction temperatures during repetitive surges, PCB layout must replicate the recommended pad dimensions and avoid excessive trace impedance; reducing pad size increases RθJA and risks thermal runaway under high-duty-cycle events. The P6SMB20CAHM3_A/I's RθJA is optimized for standard SMB land patterns used in automotive and industrial PCBs.
Does P6SMB20CAHM3_A/I require special handling or moisture precautions before soldering?
No, P6SMB20CAHM3_A/I is rated MSL Level 1 per J-STD-020, meaning it can be stored indefinitely at ambient conditions and subjected to standard lead-free reflow profiles with peak temperature up to 260 °C without baking or dry-pack requirements. Its matte tin-plated leads comply with J-STD-002 and JESD22-B102 for solderability, and the device passes JESD201 Class 2 whisker testing. This eliminates moisture sensitivity concerns and streamlines manufacturing for the P6SMB20CAHM3_A/I in high-volume SMT lines.
P6SMB20CAHM3_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):
- 17.1V
- Voltage - Breakdown (Min):
- 19V
- Voltage - Clamping (Max) @ Ipp:
- 27.7V
- Current - Peak Pulse (10/1000µs):
- 21.7A
- 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)
P6SMB20CAHM3_A/I FAQ
1.How can I place an order for P6SMB20CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB20CAHM3_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 P6SMB20CAHM3_A/I reliable?
The price and inventory of P6SMB20CAHM3_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 P6SMB20CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for P6SMB20CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB20CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB20CAHM3_A/I?
P6SMB20CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB20CAHM3_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 P6SMB20CAHM3_A/I?
For technical support, including P6SMB20CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB20CAHM3_A/I requirements.
6.How does Aetrix verify that P6SMB20CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All P6SMB20CAHM3_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 P6SMB20CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of P6SMB20CAHM3_A/I?
All P6SMB20CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB20CAHM3_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 P6SMB20CAHM3_A/I part is unused and in its original packaging.
Return procedure for P6SMB20CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB20CAHM3_A/I Tags
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