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Vishay General Semiconductor - Diodes Division P6SMB20CAHM3/H
- Part No.:
- P6SMB20CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB20CAHM3/H.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,350
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Product details
Overview
P6SMB20CAHM3/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMB (DO-214AA) package, designed for clamping voltage transients on signal or power lines. It features a 17.1 V standoff voltage (VWM), 21.2 V minimum breakdown voltage (VBR), 27.7 V maximum clamping voltage at 21.7 A peak pulse current, and 600 W peak pulse power capability with a 10/1000 μs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the P6SMB20CAHM3/H datasheet, P6SMB20CAHM3/H pinout, P6SMB20CAHM3/H application, or P6SMB20CAHM3/H equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification status, halogen-free RoHS compliance, and thermal resistance (RθJA = 100 °C/W) under PCB pad-limited cooling conditions.
Technical Context
The P6SMB20CAHM3/H operates as a bidirectional avalanche diode, symmetrically clamping transient overvoltages in both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 μA at 17.1 V) across -65 °C to +150 °C operating temperature range.
It delivers 600 W peak pulse power handling per 10/1000 μs waveform at TA = 25 °C, derated linearly above 25 °C per Fig. 2, with typical junction-to-lead thermal resistance of 20 °C/W enabling localized heat dissipation into PCB copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 17.1 V - Maximum continuous reverse voltage before clamping begins; defines safe operating margin below system rail. |
| VBR (Breakdown Voltage) | 19.0–21.0 V at 1.0 mA - Voltage at which device enters avalanche conduction; tight tolerance supports predictable protection threshold. |
| VC (Clamping Voltage) | 27.7 V at 21.7 A IPPM - Peak voltage seen by protected circuit during 10/1000 μs surge; critical for IC-level ESD/lightning immunity. |
| PPPM | 600 W - Surge energy absorption capacity with standard 10/1000 μs waveform; enables robust protection against inductive switching events. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on 0.2" × 0.2" copper pads; determines max allowable power dissipation at elevated ambient temperatures. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in under-hood automotive and industrial environments. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, matte tin-plated terminals solderable per J-STD-002. Bidirectional construction has no polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional terminal pair | Either terminal serves as anode or cathode depending on transient polarity; no band marking required. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns. |
| 600 W peak pulse power | Withstands repetitive 10/1000 μs surges up to 0.01% duty cycle - suitable for motor drive feedback and CAN bus line protection. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control modules and ADAS sensor interfaces. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a/5a), improving system-level EMC robustness. |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control units exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS clamp limiting transient excursions to ≤27.7 V during ISO 16750-2 load dump events. Use Value: Prevents latch-up or gate oxide damage in downstream op-amps and ADC inputs while maintaining signal integrity below 17.1 V nominal. |
Use Scenario: Shielding RS-485 transceiver data lines in factory automation PLCs from EFT bursts and inductive kickback. IC Role / Device Role / Timing Role: Fast-response transient suppressor placed differential across A/B bus lines to clamp common-mode surges. Use Value: Maintains signal eye diagram integrity by limiting clamping time to <1 ns and holding differential voltage within ±27.7 V window. |
| Consumer Power Adapter Input | Telecom Line Card Surge Protection |
Use Scenario: Secondary-side DC input protection in USB-C PD adapters subjected to hot-plug and cable discharge events. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing 600 W surges before upstream DC-DC controller ICs. Use Value: Eliminates need for series fusing or additional crowbar circuits due to self-resetting behavior and low leakage (<1 μA). |
Use Scenario: Primary protection stage on DSL or POTS line cards facing lightning-induced surges per ITU-T K.20/K.44. IC Role / Device Role / Timing Role: First-line bidirectional clamp shunting >1 kV transients to ground before hybrid transformer and codec ICs. Use Value: Achieves >20 kV contact ESD immunity (IEC 61000-4-2) and 10/700 μs lightning surge rating via low clamping voltage and repeatable avalanche performance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20CA | Same VWM (17.1 V), lower PPPM (400 W), SMA package (DO-214AC), RθJA = 140 °C/W | Limited to lower-energy transients; less suitable for automotive under-hood or industrial motor drive environments. | Select when board space allows larger footprint and thermal budget permits higher junction temperature rise. |
| SMCJ20CA | Same VWM (17.1 V), higher PPPM (1500 W), SMC package (DO-214AB), RθJA = 60 °C/W | Overqualified for 600 W needs; requires larger PCB area and higher assembly cost. | Choose only when legacy designs mandate SMC footprint or system-level surge tests exceed 1000 W. |
Compared with SMAJ20CA and SMCJ20CA, the P6SMB20CAHM3/H delivers optimal balance of 600 W surge capability, AEC-Q101 qualification, SMB footprint compatibility, and halogen-free compliance - making it the preferred choice for new automotive and industrial designs targeting IPC Class 3 reliability with constrained board area.
Availability
P6SMB20CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial I/O protection, consumer power adapter inputs, and telecom line card surge protection requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for P6SMB20CAHM3/H 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 passive components with emphasis on high-reliability, automotive-qualified, and industry-standard solutions.
The P6SMB Series targets cost-sensitive yet reliability-critical transient suppression applications across automotive, industrial, and communications markets - delivering standardized 600 W surge capability in compact SMB packages with AEC-Q101 and halogen-free variants.
FAQ
What is the clamping voltage of the P6SMB20CAHM3/H at its rated peak pulse current?
The P6SMB20CAHM3/H has a maximum clamping voltage (VC) of 27.7 V at 21.7 A peak pulse current (IPPM) under a 10/1000 μs waveform. This value is measured per JEDEC standards and reflects the worst-case voltage imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings. The P6SMB20CAHM3/H maintains this clamping performance across its full operating temperature range (-65 °C to +150 °C).
Is the P6SMB20CAHM3/H suitable for automotive applications?
Yes, the P6SMB20CAHM3/H is AEC-Q101 qualified, as indicated by the "HM3" suffix denoting halogen-free, RoHS-compliant, and automotive-grade construction. It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias (HTRB), and ESD per AEC-Q101 Rev D. The P6SMB20CAHM3/H is commonly used in engine control units, body electronics, and ADAS sensor modules where transient immunity to ISO 7637-2 and ISO 16750-2 events is mandatory.
How does the bidirectional configuration of the P6SMB20CAHM3/H affect its PCB layout?
The P6SMB20CAHM3/H has no polarity marking and functions identically in either orientation, simplifying PCB layout and eliminating risk of reverse installation. Unlike unidirectional TVS diodes, it requires no cathode band alignment - enabling symmetrical placement across differential lines (e.g., CAN_H/CAN_L or RS-485 A/B) or floating analog paths. The P6SMB20CAHM3/H's SMB footprint remains identical regardless of directionality, supporting automated optical inspection and reducing assembly errors.
What is the thermal resistance of the P6SMB20CAHM3/H, and how does it impact power derating?
The P6SMB20CAHM3/H 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 directly governs power derating: at 75 °C ambient, the maximum continuous power dissipation drops to ~2.5 W (5.0 W × [1 − (75−25)/100]). The P6SMB20CAHM3/H's RθJA enables reliable operation in sealed enclosures or high-temperature zones without forced airflow, provided PCB copper area meets minimum pad layout recommendations.
Does the P6SMB20CAHM3/H meet lead-free soldering requirements?
Yes, the P6SMB20CAHM3/H is fully compatible with lead-free reflow processes, meeting MSL Level 1 per J-STD-020 with a maximum peak temperature of 260 °C. Its matte tin-plated terminals comply with J-STD-002 and JESD 22-B102 solderability standards, and it passes JESD 201 Class 2 whisker testing. The P6SMB20CAHM3/H requires no pre-baking and supports standard Pb-free SAC305 profiles - making it suitable for high-volume manufacturing with IPC-A-610 Class 3 compliance.
P6SMB20CAHM3/H 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:
- Discontinued at Digi-Key
- 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/H FAQ
1.How can I place an order for P6SMB20CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB20CAHM3/H 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/H reliable?
The price and inventory of P6SMB20CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB20CAHM3/H is usually 5 days.
3.What payment methods are accepted for P6SMB20CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB20CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB20CAHM3/H?
P6SMB20CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB20CAHM3/H 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/H?
For technical support, including P6SMB20CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB20CAHM3/H requirements.
6.How does Aetrix verify that P6SMB20CAHM3/H is sourced from the original manufacturer or authorized distributors?
All P6SMB20CAHM3/H 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/H meets industry standards.
7.What is the process for return or replacement of P6SMB20CAHM3/H?
All P6SMB20CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB20CAHM3/H, 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/H part is unused and in its original packaging.
Return procedure for P6SMB20CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB20CAHM3/H Tags
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