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Vishay General Semiconductor - Diodes Division P6SMB91CAHE3/5B
- Part No.:
- P6SMB91CAHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB91CAHE3/5B.pdf
- Description:
- TVS DIODE 77.8VWM 125VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,041
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Product details
Overview
P6SMB91CAHE3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal and power lines. It features a 77.8 V stand-off voltage (VWM), 86.5–95.5 V breakdown voltage (VBR) at 1 mA, 125 V maximum clamping voltage (VC) at 4.8 A peak pulse current (IPPM), and 600 W peak pulse power capability with 10/1000 μs waveform - used to protect automotive sensor interfaces and industrial I/O circuits.
For engineers reviewing the P6SMB91CAHE3/5B datasheet, P6SMB91CAHE3/5B pinout, P6SMB91CAHE3/5B application, or P6SMB91CAHE3/5B equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification status, 125 V VC rating under 4.8 A surge, thermal resistance (RθJA = 100 °C/W), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, delivering identical clamping performance regardless of transient polarity. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1 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 operating junction temperatures from –65 °C to +150 °C. Its MSL Level 1 moisture sensitivity and matte tin-plated leads comply with J-STD-002 solderability and JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 77.8 V - Maximum continuous reverse voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (Breakdown) | 86.5–95.5 V at 1 mA - Confirmed breakdown range ensuring reliable turn-on during overvoltage events. |
| VC (Clamping) | 125 V at 4.8 A IPPM - Peak voltage seen by protected circuit during 10/1000 μs surge; determines IC survivability. |
| PPPM | 600 W - Surge energy handling capacity with standard 10/1000 μs waveform; validates robustness against IEC 61000-4-5 threats. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; informs derating above 25 °C ambient. |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments. |
| AEC-Q101 | Qualified - Validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads; meets UL 94 V-0 flammability rating and J-STD-020 MSL Level 1 (peak reflow 260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional terminal pair | No polarity marking; terminals interchangeable - enables single-component protection of AC-coupled or differential signal lines. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR and VC in both directions - eliminates need for polarity-aware layout in differential bus protection (e.g., CAN, RS-485). |
| AEC-Q101 qualification | Validated for automotive-grade reliability - supports use in ADAS sensors, body control modules, and infotainment power rails. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth) without degradation when mounted per recommended pad layout. |
| Glass passivated junction | Ensures ±5% VBR tolerance and <1 μA ID at VWM - maintains low standby leakage in battery-powered systems. |
| Automated placement compatible | Standard SMB footprint and lead coplanarity - supports high-yield pick-and-place assembly at >30,000 UPH. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver inputs from load-dump and jump-start transients in vehicle door modules. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between transceiver pins and connector interface. Use Value: Limits induced surge voltage to ≤125 V, preventing damage to 5 V tolerant transceivers while maintaining signal integrity. |
Use Scenario: Shielding PLC analog input channels from field-wiring induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Primary front-end transient suppressor on 4–20 mA current loop inputs. Use Value: Clamps 1 kV/0.5 A transients within 1 ns, preserving ADC accuracy and avoiding system resets. |
| Consumer Power Adapter Output | Telecom Line Card Protection |
Use Scenario: Safeguarding USB-C PD port output stages against hot-plug and cable discharge events. IC Role / Device Role / Timing Role: Secondary-side TVS on 5–20 V output rail downstream of DC-DC converter. Use Value: Absorbs up to 600 W surge energy without latch-up, enabling compliance with USB-IF ESD stress tests. |
Use Scenario: Protecting Ethernet PHY interface pins from lightning-induced surges on outdoor telecom base station line cards. IC Role / Device Role / Timing Role: Differential-mode TVS across twisted-pair data lines (e.g., ETH_MDIO/MDC). Use Value: Symmetric clamping ensures balanced common-mode rejection and prevents PHY latch-up during 10/700 μs surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ90CA | Same SMB package, 90 V VWM, 129 V VC at 4.5 A - slightly higher clamping voltage and lower IPPM (4.5 A vs. 4.8 A). | Not AEC-Q101 qualified; limited to commercial-grade industrial or consumer use. | Select when AEC-Q101 is not required and margin for VC < 125 V is acceptable. |
| 1.5KE91CA | Through-hole DO-15 package, same 91 V nominal rating, 125 V VC at 4.8 A - identical clamping but incompatible with SMT-only production. | Requires PCB redesign and wave-solder process; unsuitable for high-density or automotive PCBs. | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not needed. |
Compared with SMAJ90CA and 1.5KE91CA, P6SMB91CAHE3/5B uniquely combines AEC-Q101 qualification, SMB SMT compatibility, and 125 V clamping at 4.8 A - making it the only drop-in solution for automotive-grade, high-volume surface-mount transient protection without layout or process changes.
Availability
P6SMB91CAHE3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial I/O protection, consumer power adapter outputs, and telecom line card designs requiring stable component supply and long-term lifecycle support.
Supply support for P6SMB91CAHE3/5B 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 and automotive-grade validation.
The P6SMB Series targets board-level transient protection in space-constrained, high-reliability applications - engineered specifically for AEC-Q101 compliance, automated manufacturing, and robust 600 W surge handling in SMB footprint.
FAQ
What does the "CA" suffix indicate in P6SMB91CAHE3/5B?
The "CA" suffix denotes a bidirectional configuration - meaning P6SMB91CAHE3/5B provides symmetrical clamping in both forward and reverse directions, with identical VBR and VC characteristics. This eliminates polarity concerns during placement and makes it ideal for protecting AC-coupled or differential signal paths such as CAN bus or RS-485 lines, unlike unidirectional variants (e.g., P6SMB91A) that require cathode orientation alignment.
Is P6SMB91CAHE3/5B qualified for automotive applications?
Yes, P6SMB91CAHE3/5B is AEC-Q101 qualified, as confirmed by its "HE3" suffix and Vishay documentation. This qualification covers stress testing including high-temperature operating life (HTOL), temperature cycling (TCT), and ESD robustness - validating its suitability for under-hood and cabin electronics such as ADAS cameras, body control modules, and infotainment power supplies.
What is the maximum clamping voltage of P6SMB91CAHE3/5B under surge conditions?
The maximum clamping voltage (VC) of P6SMB91CAHE3/5B is 125 V, measured at 4.8 A peak pulse current (IPPM) using the standard 10/1000 μs waveform. This value represents the highest voltage imposed on the protected circuit during a surge event and is critical for ensuring downstream ICs (e.g., 5 V or 3.3 V transceivers) remain within absolute maximum ratings.
How does the SMB (DO-214AA) package of P6SMB91CAHE3/5B affect thermal performance?
The SMB package of P6SMB91CAHE3/5B delivers 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 allows P6SMB91CAHE3/5B to dissipate 5.0 W continuously at 50 °C ambient, and requires derating above that temperature - essential for thermal design in enclosed automotive or industrial enclosures.
Can P6SMB91CAHE3/5B replace P6SMB91A in an existing design?
No - P6SMB91CAHE3/5B is bidirectional while P6SMB91A is unidirectional; they differ in polarity marking, clamping symmetry, and circuit role. Replacing P6SMB91A with P6SMB91CAHE3/5B may cause improper clamping on DC-biased lines. Use P6SMB91CAHE3/5B only where bidirectional protection is explicitly required, such as across differential pairs or AC signal paths.
P6SMB91CAHE3/5B 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):
- 77.8V
- Voltage - Breakdown (Min):
- 86.5V
- Voltage - Clamping (Max) @ Ipp:
- 125V
- Current - Peak Pulse (10/1000µs):
- 4.8A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
P6SMB91CAHE3/5B FAQ
1.How can I place an order for P6SMB91CAHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB91CAHE3/5B 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 P6SMB91CAHE3/5B reliable?
The price and inventory of P6SMB91CAHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB91CAHE3/5B is usually 5 days.
3.What payment methods are accepted for P6SMB91CAHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB91CAHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB91CAHE3/5B?
P6SMB91CAHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB91CAHE3/5B 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 P6SMB91CAHE3/5B?
For technical support, including P6SMB91CAHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB91CAHE3/5B requirements.
6.How does Aetrix verify that P6SMB91CAHE3/5B is sourced from the original manufacturer or authorized distributors?
All P6SMB91CAHE3/5B 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 P6SMB91CAHE3/5B meets industry standards.
7.What is the process for return or replacement of P6SMB91CAHE3/5B?
All P6SMB91CAHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB91CAHE3/5B, 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 P6SMB91CAHE3/5B part is unused and in its original packaging.
Return procedure for P6SMB91CAHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB91CAHE3/5B Tags
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