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Vishay General Semiconductor - Diodes Division P6SMB27CAHE3_B/I
- Part No.:
- P6SMB27CAHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB27CAHE3_B/I.pdf
- Description:
- 600W,27V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:2,168
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Product details
Overview
P6SMB27CAHE3_B/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 27 V breakdown voltage (VBR min/max = 25.7–28.4 V at 1 mA), 23.1 V stand-off voltage (VWM), and clamps to ≤37.5 V at 16.0 A peak pulse current (10/1000 μs), delivering 600 W peak pulse power. It is AEC-Q101 qualified and used in automotive sensor line protection.
For engineers reviewing the P6SMB27CAHE3_B/I datasheet, P6SMB27CAHE3_B/I pinout, P6SMB27CAHE3_B/I application, or P6SMB27CAHE3_B/I equivalent, this device is selected for robust ESD and surge immunity in bidirectional DC rails, especially where automotive qualification, low-profile SMB packaging, and repeatable clamping performance under repetitive transients are required.
Technical Context
The P6SMB27CAHE3_B/I operates as a symmetrical avalanche diode with identical forward and reverse clamping characteristics due to its bidirectional construction. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 μA at VWM), while the 100 °C/W junction-to-ambient thermal resistance requires careful PCB copper pad design (0.2" × 0.2") for sustained 5.0 W power dissipation.
It responds to transients in <1 ps with low incremental surge resistance, enabling effective suppression of inductive switching spikes and lightning-induced surges. The device meets MSL Level 1 per J-STD-020 and supports reflow up to 260 °C peak, making it compatible with standard SMT assembly processes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 23.1 V - Maximum continuous reverse operating voltage before significant leakage; defines safe DC working margin. |
| VBR (min/max) | 25.7 V / 28.4 V at 1 mA - Confirmed avalanche onset range; ensures predictable clamping initiation across temperature and unit variation. |
| VC @ IPPM | ≤37.5 V at 16.0 A (10/1000 μs) - Clamped voltage during worst-case surge; determines protected circuit's maximum transient stress. |
| PPPM | 600 W - Peak transient energy absorption capability; validates suitability for ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 3 surges. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments with derated power above 25 °C. |
| Package | SMB (DO-214AA) - Standardized 2-pin surface-mount outline with 0.220" × 0.130" footprint; optimized for automated placement and thermal relief via copper pads. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD; supports PPAP documentation for Tier 1 suppliers. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetrical terminals function identically in either direction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity; no functional distinction between pins. |
| Terminal 2 | Anode/Cathode (bidirectional) | Electrically identical to Terminal 1; device conducts symmetrically in both directions above VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables single-device protection against high-energy transients without cascading TVS stages or external current limiting. |
| Low clamping ratio (VC/VBR ≈ 1.33) | Minimizes overvoltage stress on downstream ICs-critical for 3.3 V or 5 V logic interfaces with tight absolute maximum ratings. |
| AEC-Q101 qualification (HE3 suffix) | Confirms long-term reliability in automotive applications including engine control units, body electronics, and ADAS sensor modules. |
| MSL Level 1, 260 °C reflow compatible | Eliminates moisture sensitivity concerns and supports standard lead-free reflow profiles without pre-bake. |
| Glass passivated junction | Provides stable leakage performance (<1 μA at VWM) and consistent VBR over lifetime, even under humidity and thermal cycling. |
Applications
| Automotive Sensor Interface Protection | Industrial CAN Bus Line Protection |
|---|---|
|
Use Scenario: Protecting analog output lines (e.g., 0–5 V throttle position sensor signals) from load dump and inductive kickback in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point to shunt surge energy before reaching precision ADC or op-amp input stage. Use Value: Maintains signal integrity by limiting transient overvoltage to ≤37.5 V, preventing latch-up or permanent damage to 5 V-tolerant interface ICs. |
Use Scenario: Safeguarding CAN_H and CAN_L differential pair against ESD (IEC 61000-4-2 ±8 kV contact) and fast transient bursts in factory automation nodes. IC Role / Device Role / Timing Role: Low-capacitance (typ. <100 pF) TVS placed across differential lines to clamp common-mode surges without distorting 1 Mbps CAN signaling. Use Value: Preserves signal rise/fall times and bus timing margins while meeting ISO 11898-2 EMC requirements for automotive and industrial networks. |
| Consumer Power Adapter Input Stage | Telecom DSL Line Surge Protection |
|
Use Scenario: Secondary-side DC rail protection in wall adapters subjected to mains-borne surges and hot-plug transients. IC Role / Device Role / Timing Role: Standoff-rated TVS (23.1 V) placed after rectification but before DC-DC converter input to absorb residual AC-line coupled energy. Use Value: Prevents overvoltage shutdown or MOSFET gate oxide failure in buck controllers by clamping to 37.5 V before input capacitor overcharge occurs. |
Use Scenario: Primary protection for ADSL/VDSL line cards exposed to lightning-induced surges on twisted-pair telephone lines. IC Role / Device Role / Timing Role: First-stage bidirectional suppressor mounted at line entry, coordinated with gas discharge tube (GDT) for staged energy handling. Use Value: Absorbs initial 600 W surge energy within 10/1000 μs, reducing GDT follow-on current and extending system-level surge life beyond 100k operations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ28CA | 28 V VBR (min/max = 26.6–29.4 V); same SMB package; 400 W PPPM; not AEC-Q101 qualified. | Limited to commercial/industrial use; lacks automotive qualification and lower surge rating reduces margin for ISO 7637-2 Pulse 5a. | Select when AEC-Q101 is unnecessary and cost sensitivity outweighs 33% lower peak power headroom. |
| 1.5KE27CA | 27 V VBR; DO-201 package; 1500 W PPPM; through-hole mounting; higher VC (45.7 V). | Requires PCB real estate for axial leads; higher clamping voltage increases risk to 3.3 V logic; unsuitable for automated SMT lines. | Choose only for legacy through-hole designs needing higher energy rating and where layout change is acceptable. |
Compared with SMAJ28CA and 1.5KE27CA, the P6SMB27CAHE3_B/I delivers automotive-grade reliability in a compact SMT package with optimal clamping voltage and verified 600 W surge capacity-making it the preferred choice for new automotive and space-constrained industrial designs requiring production-ready qualification.
Availability
P6SMB27CAHE3_B/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial CAN networks, and telecom line card designs requiring stable component supply, AEC-Q101 compliance, and repeatable transient suppression performance.
Supply support for P6SMB27CAHE3_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, efficiency, and application-specific optimization.
The P6SMB series is engineered for high-reliability transient suppression in automotive, industrial, and communications systems-delivering standardized surge robustness in compact surface-mount packages with validated qualification for harsh environments.
FAQ
What does the "CA" suffix indicate in P6SMB27CAHE3_B/I?
The "CA" suffix in P6SMB27CAHE3_B/I denotes a bidirectional configuration, meaning the device provides symmetrical transient suppression in both polarities. Unlike unidirectional variants (e.g., P6SMB27A), it has no cathode marking and functions identically regardless of voltage polarity-ideal for protecting AC-coupled or differential signal lines such as CAN or RS-485. This is confirmed in the Vishay P6SMB datasheet revision 09-Jan-2024, section "DEVICES FOR BIDIRECTION APPLICATIONS".
Is P6SMB27CAHE3_B/I suitable for automotive applications?
Yes, P6SMB27CAHE3_B/I is AEC-Q101 qualified, as indicated by the "HE3" suffix and documented in the ordering information table (page 3 of datasheet 88370). It undergoes stress testing for temperature cycling, high-temperature reverse bias, and ESD per automotive standards, supporting deployment in engine control units, body control modules, and ADAS sensor interfaces where reliability under thermal and electrical stress is mandatory.
What is the maximum clamping voltage for P6SMB27CAHE3_B/I under surge conditions?
The maximum clamping voltage (VC) for P6SMB27CAHE3_B/I is 37.5 V at 16.0 A peak pulse current with a 10/1000 μs waveform, per the Electrical Characteristics table (page 2 of datasheet 88370). This value represents the upper limit of voltage seen by downstream circuitry during worst-case transient events and is critical for ensuring compatibility with 3.3 V or 5 V logic interfaces.
How does the SMB (DO-214AA) package of P6SMB27CAHE3_B/I affect thermal performance?
The SMB package of P6SMB27CAHE3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads per datasheet page 3. This requires careful PCB layout-minimum pad area, thermal vias, and copper pour-to sustain its 5.0 W steady-state power dissipation. Without adequate copper, junction temperature rise may exceed the +150 °C maximum, degrading long-term reliability.
Can P6SMB27CAHE3_B/I replace P6SMB27A in an existing design?
No-P6SMB27CAHE3_B/I is bidirectional, while P6SMB27A is unidirectional with a defined cathode band. Substituting them requires verifying circuit topology: bidirectional use (e.g., across differential lines) is valid, but unidirectional placements (e.g., cathode-to-rail) will fail. Also, P6SMB27A has different VWM (23.1 V vs. 25.6 V) and slightly higher VC (38.9 V), so clamping behavior differs. Always validate with actual surge testing.
P6SMB27CAHE3_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)
P6SMB27CAHE3_B/I FAQ
1.How can I place an order for P6SMB27CAHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB27CAHE3_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 P6SMB27CAHE3_B/I reliable?
The price and inventory of P6SMB27CAHE3_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 P6SMB27CAHE3_B/I is usually 5 days.
3.What payment methods are accepted for P6SMB27CAHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB27CAHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB27CAHE3_B/I?
P6SMB27CAHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB27CAHE3_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 P6SMB27CAHE3_B/I?
For technical support, including P6SMB27CAHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB27CAHE3_B/I requirements.
6.How does Aetrix verify that P6SMB27CAHE3_B/I is sourced from the original manufacturer or authorized distributors?
All P6SMB27CAHE3_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 P6SMB27CAHE3_B/I meets industry standards.
7.What is the process for return or replacement of P6SMB27CAHE3_B/I?
All P6SMB27CAHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB27CAHE3_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 P6SMB27CAHE3_B/I part is unused and in its original packaging.
Return procedure for P6SMB27CAHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB27CAHE3_B/I Tags
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