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Vishay General Semiconductor - Diodes Division P6SMB27CAHM3_B/I
- Part No.:
- P6SMB27CAHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB27CAHM3_B/I.pdf
- Description:
- 600W,27V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:6,993
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Product details
Overview
P6SMB27CAHM3_B/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, rated for 27 V standoff voltage (VWM), 37.5 V clamping voltage (VC) at 16.0 A peak pulse current (IPPM), and 600 W peak pulse power (PPPM) with 10/1000 μs waveform. It protects signal lines and power rails in automotive sensor interfaces, industrial I/O modules, and telecom line cards against ESD and inductive switching transients.
For engineers reviewing the P6SMB27CAHM3_B/I datasheet, P6SMB27CAHM3_B/I pinout, P6SMB27CAHM3_B/I application, or P6SMB27CAHM3_B/I equivalent, this device is selected for robust bidirectional surge suppression in space-constrained PCB layouts requiring AEC-Q101 qualification, low clamping ratio, and MSL Level 1 reflow compatibility up to 260 °C.
Technical Context
The P6SMB27CAHM3_B/I operates as a bidirectional avalanche diode, symmetrically clamping voltage transients above ±27 V in both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 μA at VWM) across -65 °C to +150 °C operating range.
Designed for transient immunity per IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and ISO 7637-2 (automotive load dump), it delivers 37.5 V clamping at 16.0 A IPPM with <0.096 %/°C temperature coefficient of VBR and 20 °C/W junction-to-lead thermal resistance for effective power dissipation during repetitive surges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 23.1 V - Maximum continuous reverse voltage before conduction begins; defines safe operating margin below clamping threshold |
| VBR (Breakdown) | 25.7–28.4 V at 1.0 mA - Verified avalanche onset range ensuring consistent turn-on under transient stress |
| VC (Clamping) | 37.5 V at 16.0 A IPPM - Peak voltage seen by protected circuit during worst-case 10/1000 μs surge |
| PPPM | 600 W - Sustains high-energy transients without failure; enables protection of 3.3 V/5 V/12 V rails in harsh environments |
| ID (Leakage) | ≤1.0 μA at 23.1 V - Negligible standby current that avoids loading sensitive analog or low-power circuits |
| TJ max. | +150 °C - Supports operation in under-hood automotive and industrial enclosures without derating |
| MSL Level | Level 1 (260 °C peak) - Compatible with standard lead-free reflow profiles without moisture sensitivity concerns |
| AEC-Q101 | Qualified - Validated for automotive electronics per stress test requirements including HTGB, HTRB, and TCT |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, matte tin-plated terminals. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); 0.2" × 0.2" copper pad layout recommended for thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; common terminal in bidirectional configuration | No polarity marking required; symmetrical conduction enables AC/DC line protection without orientation constraints |
| Cathode | Current exit point in forward bias; common terminal in bidirectional configuration | Electrically identical to Anode in bidirectional mode; terminals interchangeable for layout flexibility |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal paths (e.g., RS-485, CAN, USB D+/D−) without external polarity management |
| 600 W peak pulse power | Withstands ≥1000 surges at full rating per JEDEC JESD22-A114, supporting long-term reliability in industrial control systems |
| AEC-Q101 qualified (HM3_B/I) | Validated for automotive Grade 2 (-40 °C to +105 °C ambient) applications including body electronics and ADAS sensor interfaces |
| Low clamping ratio (VC/VBR ≈ 1.33) | Minimizes overvoltage stress on downstream ICs-critical for protecting 3.3 V logic inputs and precision analog front-ends |
| MSL Level 1 | Eliminates bake-out requirement prior to SMT assembly, reducing manufacturing cost and cycle time |
Applications
| Automotive Sensor Interface | Industrial PLC Analog Input |
|---|---|
Use Scenario: Protecting LIN bus transceivers and temperature/pressure sensor outputs from load-dump and battery-reverse transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector entry point to shunt surge energy before reaching ASIC or microcontroller GPIO. Use Value: Maintains signal integrity under ISO 7637-2 Pulse 5a (75 V/300 ms) while adding <0.5 mm² footprint and zero additional BOM cost vs. discrete Zener+capacitor solutions. |
Use Scenario: Safeguarding 4–20 mA current-loop inputs in programmable logic controllers exposed to field-wiring ESD and inductive kickback. IC Role / Device Role / Timing Role: Primary overvoltage limiter on input differential pair, coordinated with series current-limiting resistor and downstream op-amp input protection. Use Value: Clamps transients to ≤37.5 V within <1 ns, preventing latch-up or gate oxide damage in precision instrumentation amplifiers. |
| Telecom Line Card Protection | Consumer USB Port ESD Shielding |
Use Scenario: Secondary surge protection on xDSL or Ethernet PHY lines after primary gas discharge tube (GDT) stage in central office equipment. IC Role / Device Role / Timing Role: Fast-response secondary clamp absorbing residual energy not diverted by upstream GDT, especially for fast-rising EFT pulses. Use Value: Achieves <100 ps response time and <20 Ω dynamic impedance, limiting let-through voltage to <40 V during IEC 61000-4-4 Level 4 (4 kV) testing. |
Use Scenario: Board-level ESD protection for USB 2.0 data lines (D+, D−) in portable media players and docking stations. IC Role / Device Role / Timing Role: Low-capacitance (≈200 pF typical) bidirectional suppressor placed adjacent to USB connector to meet IEC 61000-4-2 ±15 kV contact discharge. Use Value: Adds <0.3 pF parasitic capacitance per line-well below 1.5 pF limit for full-speed USB-preserving signal rise time and eye diagram integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ28CA | 28 V VWM, 45.4 V VC at 13.2 A, SMA package (larger footprint, higher RθJA = 150 °C/W) | Lower peak power (400 W), less suitable for repetitive surge environments like motor drives | Select when cost sensitivity outweighs space constraints and thermal performance requirements |
| SMCJ28CA | 28 V VWM, 43.5 V VC at 23.0 A, SMC package (higher PPPM = 1500 W, larger 7.11 mm × 6.22 mm outline) | Over-specified for compact consumer designs; requires 3× PCB area vs. SMB | Choose for high-reliability industrial power supplies needing >1000 W surge handling and extended thermal margin |
Compared with SMAJ28CA and SMCJ28CA, the P6SMB27CAHM3_B/I delivers optimal balance of compact SMB footprint, AEC-Q101 qualification, and 600 W capability-making it preferred for automotive and space-limited industrial applications where thermal efficiency and qualification compliance are critical.
Availability
P6SMB27CAHM3_B/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC analog inputs, and telecom line card protection requiring stable component supply, long-term lifecycle support, and traceable AEC-Q101 qualified parts.
Supply support for P6SMB27CAHM3_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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, power efficiency, and automotive-grade validation.
The P6SMB Series targets board-level transient protection in automotive, industrial, and telecom systems-designed specifically for high-power density, low-profile mounting, and AEC-Q101 compliance without sacrificing clamping performance.
FAQ
What is the maximum clamping voltage of the P6SMB27CAHM3_B/I under a 10/1000 μs surge?
The P6SMB27CAHM3_B/I clamps to a maximum of 37.5 V at 16.0 A peak pulse current (IPPM) when subjected to a 10/1000 μs waveform. This value is measured per standard test conditions (TA = 25 °C, mounted on 0.2" × 0.2" copper pads) and defines the upper voltage limit imposed on protected circuitry during transient events. The P6SMB27CAHM3_B/I maintains this clamping performance across its full operating temperature range.
Is the P6SMB27CAHM3_B/I suitable for automotive applications?
Yes, the P6SMB27CAHM3_B/I is AEC-Q101 qualified (denoted by the HM3_B/I suffix), having passed stress tests including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling (TCT). It is rated for operation from -65 °C to +150 °C junction temperature and supports automotive use cases such as LIN/CAN bus protection, sensor interface hardening, and infotainment port shielding. The P6SMB27CAHM3_B/I meets MSL Level 1 for lead-free reflow compatibility.
How does the bidirectional configuration of the P6SMB27CAHM3_B/I affect PCB layout?
The P6SMB27CAHM3_B/I has no polarity marking and functions identically in both directions, eliminating orientation constraints during placement. This simplifies PCB layout for AC-coupled or floating signal paths (e.g., RS-485 differential pairs or USB D+/D− lines), reduces assembly errors, and allows flexible routing without dedicated anode/cathode trace assignment. The P6SMB27CAHM3_B/I's SMB footprint remains unchanged versus unidirectional variants, preserving layout reuse across design variants.
What is the leakage current specification for the P6SMB27CAHM3_B/I at its rated standoff voltage?
The P6SMB27CAHM3_B/I exhibits a maximum reverse leakage current (ID) of 1.0 μA at its rated standoff voltage of 23.1 V (VWM), measured at TA = 25 °C. This ultra-low leakage ensures minimal loading of high-impedance nodes-such as sensor output buffers or precision reference dividers-without compromising accuracy or power budget. The P6SMB27CAHM3_B/I maintains leakage <5.0 μA across its full -65 °C to +150 °C operating range.
Does the P6SMB27CAHM3_B/I require heatsinking for standard operation?
No external heatsink is required for the P6SMB27CAHM3_B/I under normal surge conditions, as its SMB package provides sufficient thermal dissipation via PCB copper pads. With a typical junction-to-lead thermal resistance (RθJL) of 20 °C/W and junction-to-ambient (RθJA) of 100 °C/W (on minimum recommended pad layout), the P6SMB27CAHM3_B/I safely handles repetitive 600 W pulses at low duty cycles (<0.01 %). Layout adherence to Vishay's 0.2" × 0.2" copper pad recommendation ensures reliable thermal performance without added mechanical complexity.
P6SMB27CAHM3_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):
- 23.1V
- Voltage - Breakdown (Min):
- 25.7V
- Voltage - Clamping (Max) @ Ipp:
- 37.5V
- Current - Peak Pulse (10/1000µs):
- 16A
- 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)
P6SMB27CAHM3_B/I FAQ
1.How can I place an order for P6SMB27CAHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB27CAHM3_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 P6SMB27CAHM3_B/I reliable?
The price and inventory of P6SMB27CAHM3_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 P6SMB27CAHM3_B/I is usually 5 days.
3.What payment methods are accepted for P6SMB27CAHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB27CAHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB27CAHM3_B/I?
P6SMB27CAHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB27CAHM3_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 P6SMB27CAHM3_B/I?
For technical support, including P6SMB27CAHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB27CAHM3_B/I requirements.
6.How does Aetrix verify that P6SMB27CAHM3_B/I is sourced from the original manufacturer or authorized distributors?
All P6SMB27CAHM3_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 P6SMB27CAHM3_B/I meets industry standards.
7.What is the process for return or replacement of P6SMB27CAHM3_B/I?
All P6SMB27CAHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB27CAHM3_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 P6SMB27CAHM3_B/I part is unused and in its original packaging.
Return procedure for P6SMB27CAHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB27CAHM3_B/I Tags
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Diodes Incorporated
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