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Vishay General Semiconductor - Diodes Division P6SMB20CAHM3_B/I
- Part No.:
- P6SMB20CAHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB20CAHM3_B/I.pdf
- Description:
- 600W,20V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:8,305
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Product details
Overview
P6SMB20CAHM3_B/I 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 20 V standoff voltage (VWM), 22.8–25.2 V breakdown voltage (VBR) at 1 mA, 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 - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial control systems.
For engineers reviewing the P6SMB20CAHM3_B/I datasheet, P6SMB20CAHM3_B/I pinout, P6SMB20CAHM3_B/I application, or P6SMB20CAHM3_B/I equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), and compliance with J-STD-020 MSL level 1 reflow profile up to 260 °C peak.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, delivering identical clamping performance regardless of transient polarity. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 μA at VWM), while the low incremental surge resistance enables rapid energy diversion during ESD or lightning-induced surges.
The device is rated for repetitive 10/1000 μs pulses at 0.01% duty cycle and supports continuous power dissipation of 5.0 W on an infinite heatsink at 50 °C ambient. Junction temperature is rated from –65 °C to +150 °C, and it meets JESD201 Class 2 whisker resistance requirements with matte tin-plated leads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 20 V - Maximum continuous reverse voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (Breakdown) | 22.8–25.2 V at 1 mA - Confirmed breakdown threshold range; ensures reliable turn-on during overvoltage events. |
| VC (Clamping) | 27.7 V at IPPM = 21.7 A - Peak voltage seen by protected circuit under 600 W transient; determines stress on downstream components. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 μs waveform; defines transient energy absorption capacity. |
| RθJA | 100 °C/W - Thermal resistance junction-to-ambient; informs PCB pad layout and derating above 25 °C ambient. |
| TJ max. | +150 °C - Maximum junction temperature; sets upper limit for thermal design in high-reliability applications. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability per stress test standard; required for under-hood and ADAS modules. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD22-B102. No polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional terminal pair | No functional polarity - either terminal serves as anode or cathode depending on transient direction; enables single-device protection of AC or differential lines. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR and VC in both directions - eliminates need for dual unidirectional devices in AC-coupled or floating signal paths. |
| AEC-Q101 qualification | Validated for automotive environments - supports deployment in engine control units, body electronics, and infotainment without additional qualification effort. |
| MSL Level 1 rating | Reflow-compatible up to 260 °C peak - allows standard SMT assembly without moisture sensitivity concerns or baking requirements. |
| 600 W peak pulse power | Handles IEC 61000-4-5 Level 4 surges (4 kV line-earth) - provides robust protection against lightning-induced transients in industrial fieldbus interfaces. |
| Glass passivated junction | Stable leakage (<1 μA at VWM) and long-term parameter drift - ensures consistent clamping behavior over 15+ year service life in telecom infrastructure. |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine bay modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS clamping transient spikes before they reach ADC input or op-amp buffer stages. Use Value: Maintains signal integrity under 12 V system load dump (ISO 16750-2) by limiting voltage to ≤27.7 V, preventing latch-up or permanent damage to 3.3 V/5 V sensor signal chains. |
Use Scenario: Safeguarding CANH/CANL differential pair in vehicle gateway ECUs subjected to ESD and coupled noise from adjacent high-current solenoid drivers. IC Role / Device Role / Timing Role: Symmetric transient suppression across both bus lines to preserve common-mode rejection and bit timing margins. Use Value: Enables compliance with ISO 10605 ESD immunity (±25 kV air, ±20 kV contact) without degrading CAN FD data rate stability up to 5 Mbps. |
| Telecom Power Supply Input | Consumer USB Port ESD Protection |
Use Scenario: Input-stage surge protection for 24 V DC-DC converters powering base station RF modules in outdoor cabinets. IC Role / Device Role / Timing Role: Primary front-end clamp absorbing IEC 61000-4-5 combination wave surges before upstream fuse or controller IC. Use Value: Withstands 600 W peak pulses (10/1000 μs) without degradation, extending converter lifetime in lightning-prone regions while maintaining <1 μA leakage at 20 V nominal input. |
Use Scenario: Secondary-level ESD protection on VBUS and D+/D− lines of USB 2.0 ports in smart home hubs, placed after primary polymer fuse. IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) voltage clamp limiting transient overshoot during human-body-model (HBM) discharges. Use Value: Clamps 8 kV HBM ESD events to <27.7 V within 1 ns, preventing gate oxide rupture in USB switch ICs and preserving full-speed enumeration reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20CA | Same VWM/VBR/VC specs but lower PPPM (400 W); SMA package (DO-214AC), larger footprint and higher RθJA (140 °C/W). | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 or automotive load dump. | Select when cost sensitivity outweighs surge margin and board space permits larger SMA footprint. |
| 1.5SMC20CA | Higher PPPM (1500 W) but larger SMC (DO-214AB) package; same VWM/VBR/VC; RθJA = 60 °C/W. | Over-specified for most 20 V rail protection; requires more PCB area and may complicate automated placement. | Choose only when legacy designs mandate SMC footprint or when protecting high-power 24 V industrial PLC outputs. |
Compared with SMAJ20CA and 1.5SMC20CA, P6SMB20CAHM3_B/I delivers optimal balance of 600 W surge capability, compact SMB footprint, AEC-Q101 qualification, and MSL Level 1 compatibility - making it the preferred choice for new automotive and space-constrained industrial designs requiring validated reliability and process compatibility.
Availability
P6SMB20CAHM3_B/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, telecom power inputs, and consumer USB port protection requiring stable component supply and AEC-Q101-compliant sourcing.
Supply support for P6SMB20CAHM3_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, and protection devices with emphasis on reliability, precision, and automotive-grade validation.
The P6SMB Series was developed specifically for high-energy transient suppression in automotive, industrial, and telecom applications where compact size, bidirectional symmetry, and AEC-Q101 qualification are mandatory design requirements.
FAQ
What does the "CA" suffix indicate in P6SMB20CAHM3_B/I?
The "CA" suffix in P6SMB20CAHM3_B/I denotes a bidirectional configuration - meaning the device provides symmetrical transient voltage clamping in both forward and reverse directions. This is essential for protecting AC-coupled signals, differential buses like CAN or RS-485, and floating power rails where polarity reversal can occur. Unlike unidirectional variants (e.g., P6SMB20A), the CA version has no cathode marking and functions identically regardless of terminal orientation.
Is P6SMB20CAHM3_B/I qualified for automotive use?
Yes, P6SMB20CAHM3_B/I is AEC-Q101 qualified, as confirmed by the "HM3_B" suffix indicating halogen-free, RoHS-compliant construction with automotive-grade reliability testing. It meets stress requirements for temperature cycling, humidity bias, mechanical shock, and ESD - enabling direct use in engine control units, ADAS camera modules, and body control modules without additional qualification.
What is the maximum clamping voltage of P6SMB20CAHM3_B/I under surge conditions?
The maximum clamping voltage (VC) of P6SMB20CAHM3_B/I is 27.7 V at a peak pulse current (IPPM) of 21.7 A, measured with a 10/1000 μs waveform. This value represents the highest voltage imposed on the protected circuit during a 600 W transient event - critical for ensuring downstream 3.3 V or 5 V logic components remain within absolute maximum ratings.
How does the SMB (DO-214AA) package of P6SMB20CAHM3_B/I compare to SMA or SMC alternatives?
The SMB (DO-214AA) package of P6SMB20CAHM3_B/I measures 3.94 mm × 2.20 mm × 1.52 mm - smaller than SMA (DO-214AC) and significantly smaller than SMC (DO-214AB). Its compact size enables high-density layouts in space-constrained modules, while maintaining 600 W surge capability and MSL Level 1 reflow compatibility - a key advantage over larger packages when board real estate is limited.
Does P6SMB20CAHM3_B/I require external heat sinking for 5.0 W continuous operation?
No, P6SMB20CAHM3_B/I is rated for 5.0 W continuous power dissipation only when mounted on an infinite heatsink at TA = 50 °C - a theoretical condition not achievable in typical PCB layouts. In practice, its RθJA of 100 °C/W means that even at 1 W dissipation, junction temperature rises 100 °C above ambient. Therefore, P6SMB20CAHM3_B/I is intended for transient-only operation (not continuous DC power), and thermal design must focus on short-pulse energy absorption rather than steady-state cooling.
P6SMB20CAHM3_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:
- -
- 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_B/I FAQ
1.How can I place an order for P6SMB20CAHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB20CAHM3_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 P6SMB20CAHM3_B/I reliable?
The price and inventory of P6SMB20CAHM3_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 P6SMB20CAHM3_B/I is usually 5 days.
3.What payment methods are accepted for P6SMB20CAHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB20CAHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB20CAHM3_B/I?
P6SMB20CAHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB20CAHM3_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 P6SMB20CAHM3_B/I?
For technical support, including P6SMB20CAHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB20CAHM3_B/I requirements.
6.How does Aetrix verify that P6SMB20CAHM3_B/I is sourced from the original manufacturer or authorized distributors?
All P6SMB20CAHM3_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 P6SMB20CAHM3_B/I meets industry standards.
7.What is the process for return or replacement of P6SMB20CAHM3_B/I?
All P6SMB20CAHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB20CAHM3_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 P6SMB20CAHM3_B/I part is unused and in its original packaging.
Return procedure for P6SMB20CAHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB20CAHM3_B/I Tags
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