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Vishay General Semiconductor - Diodes Division P6SMB91CAHE3_A/I
- Part No.:
- P6SMB91CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB91CAHE3_A/I.pdf
- Description:
- TVS DIODE 77.8VWM 125VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P6SMB91CAHE3_A/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 91 V breakdown voltage (VBR), 77.8 V stand-off voltage (VWM), 125 V maximum clamping voltage (VC) at 4.8 A peak pulse current, and 600 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial systems.
For engineers reviewing the P6SMB91CAHE3_A/I datasheet, P6SMB91CAHE3_A/I pinout, P6SMB91CAHE3_A/I application, or P6SMB91CAHE3_A/I equivalent, key selection considerations include bidirectional surge suppression capability, AEC-Q101 qualification, SMB (DO-214AA) package compatibility, and clamping performance under repetitive 0.01% duty cycle transients.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling protection of AC-coupled or differential signal paths without polarity sensitivity. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 μA at VWM), while the low incremental surge resistance supports fast energy dissipation during ESD or lightning-induced surges.
The device is rated for 150 °C maximum junction temperature and meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow peak. Its thermal resistance (RθJA = 100 °C/W) reflects standard SMB mounting on 5.0 mm × 5.0 mm copper pads, and it delivers consistent clamping within ±5% tolerance across production lots.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 86.5 V / 95.5 V at 1.0 mA test current - defines reliable conduction onset range for transient clamping |
| VWM | 77.8 V - maximum continuous reverse voltage before significant leakage; sets safe operating margin below VBR |
| VC @ IPPM | 125 V at 4.8 A peak pulse - actual clamped voltage seen by protected circuit during 10/1000 μs surge |
| PPPM | 600 W - peak transient power handling capacity with 0.01% duty cycle; determines survivability against IEC 61000-4-5 surges |
| IPPM | 4.8 A - maximum non-repetitive surge current supported at VC; used to size upstream fusing or trace routing |
| TJ max. | +150 °C - maximum junction temperature; enables operation in under-hood automotive or high-ambient industrial environments |
| Package | SMB (DO-214AA) - standardized 2-pin SMD outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height for automated placement |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Cathode/anode terminals are functionally symmetrical; both leads serve as interchangeable surge current paths.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge current entry (bidirectional) | Accepts transient current from either direction; connects to line being protected |
| Cathode | Surge current exit (bidirectional) | Completes low-impedance path to ground or return rail during clamping event |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV) surge events when properly mounted on recommended PCB copper area |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes overvoltage stress on downstream components compared to higher-ratio TVS devices |
| MSL Level 1 moisture sensitivity | Enables direct placement without baking; compatible with standard lead-free reflow profiles up to 260 °C peak |
| Glass-passivated junction | Ensures long-term parameter stability and low leakage drift over temperature and lifetime |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure, temperature, or position sensors in engine compartments exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between sensor signal line and chassis ground to limit transient excursions. Use Value: Maintains signal integrity below 125 V during 100 V/50 ms load dump events, preventing ADC saturation or op-amp latch-up in sensor signal conditioning circuits. |
Use Scenario: Safeguarding CAN_H and CAN_L differential pair against ESD and coupled transients in factory automation controllers. IC Role / Device Role / Timing Role: Symmetric TVS pair (one per line) referenced to common ground, absorbing common-mode surges without disrupting differential signaling. Use Value: Clamps transients to ≤125 V while preserving CAN bus timing margins and bit error rate (BER) compliance per ISO 11898-2. |
| Telecom Power Input Stage | Consumer USB-C Port Protection |
|
Use Scenario: Front-end surge suppression on 24 V DC input rails of PoE-powered network switches and base station radios. IC Role / Device Role / Timing Role: Primary overvoltage clamp ahead of DC-DC converters and hot-swap controllers. Use Value: Limits input rail overshoot to 125 V during 1 kV/500 A lightning-induced surges, preventing damage to primary-side FETs and controller ICs. |
Use Scenario: Bidirectional protection of USB-C CC and VBUS lines against human-body-model (HBM) ESD and cable-induced transients. IC Role / Device Role / Timing Role: Low-capacitance TVS placed directly at connector, shunting ESD energy before reaching USB PD controller or port multiplexer. Use Value: Achieves <100 ps response time and clamps 8 kV HBM ESD to <125 V, meeting IEC 61000-4-2 Level 4 requirements without signal degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ90CA | Same SMB package, 90 V VBR, 72 V VWM, 129 V VC @ 4.7 A - slightly lower VWM and higher VC | Marginally reduced stand-off headroom; less suitable for 80–85 V nominal systems | Select when legacy design uses SMAJ series and board layout allows same footprint; verify VWM margin against system rail. |
| 1.5KE91CA | Through-hole DO-201 package, identical VBR/VC specs but 1.5 kW PPPM - larger size, higher power, no AEC-Q101 rating | Not suitable for automated SMT lines or space-constrained automotive modules | Choose only for prototyping or high-energy surge scenarios where PCB real estate permits axial leaded parts and AEC-Q101 is not required. |
Compared with SMAJ90CA and 1.5KE91CA, P6SMB91CAHE3_A/I provides tighter VBR tolerance (±5%), AEC-Q101 qualification, and optimized thermal performance in SMB for volume automotive production - making it preferred for new designs requiring reliability certification and SMT scalability.
Availability
P6SMB91CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, telecom power inputs, and consumer USB-C port protection requiring stable component supply and AEC-Q101 compliance.
Supply support for P6SMB91CAHE3_A/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, MOSFETs, and protection devices with emphasis on reliability and automotive-grade qualification.
The P6SMB Series targets high-volume transient suppression in automotive, industrial, and telecom applications, with design focus on robustness under repetitive surge stress and seamless integration into automated SMT assembly lines.
FAQ
What does the "CA" suffix indicate in P6SMB91CAHE3_A/I?
The "CA" suffix in P6SMB91CAHE3_A/I denotes a bidirectional configuration - meaning the device clamps voltage transients equally in both polarities, with no anode/cathode distinction. This makes it ideal for protecting AC-coupled signals, differential buses like CAN or RS-485, and ungrounded power rails where polarity reversal may occur. Unlike unidirectional variants (e.g., P6SMB91A), P6SMB91CAHE3_A/I has no band marking and exhibits matched VBR and VC in either direction.
Is P6SMB91CAHE3_A/I suitable for IEC 61000-4-5 surge testing?
Yes, P6SMB91CAHE3_A/I is rated for 600 W peak pulse power with a 10/1000 μs waveform - directly aligned with IEC 61000-4-5 combination wave (1.2/50 μs voltage, 8/20 μs current) test levels up to 4 kV open-circuit voltage. When mounted per Vishay's recommended 5.0 mm × 5.0 mm copper pad layout, P6SMB91CAHE3_A/I clamps the surge to ≤125 V, ensuring downstream ICs remain within absolute maximum ratings during compliance testing.
How does the HE3 suffix affect P6SMB91CAHE3_A/I's qualification status?
The "HE3" suffix in P6SMB91CAHE3_A/I indicates RoHS-compliant construction with AEC-Q101 qualification - verified for automotive use including temperature cycling, humidity bias, and mechanical shock testing. This distinguishes it from commercial-grade E3 or M3 variants and confirms suitability for under-hood, infotainment, and ADAS applications where extended temperature range (−65 °C to +150 °C) and long-term reliability are mandatory. The "_A/I" denotes 13-inch tape-and-reel packaging (3200 units/reel).
What is the maximum allowable PCB trace length between P6SMB91CAHE3_A/I and the protected node?
To maintain effective clamping, PCB trace inductance must be minimized: total loop inductance from P6SMB91CAHE3_A/I to ground should not exceed 10 nH. This typically requires trace lengths under 5 mm with direct ground vias adjacent to each terminal. Longer traces increase VPEAK = L·di/dt during fast transients, potentially exceeding the 125 V clamping voltage. For optimal performance, place P6SMB91CAHE3_A/I directly at the connector or IC pin with shortest possible paths to both line and ground.
Does P6SMB91CAHE3_A/I require derating at elevated ambient temperatures?
Yes, P6SMB91CAHE3_A/I must be derated above 25 °C ambient per Figure 2 in the datasheet: at 85 °C ambient, its 600 W peak pulse power rating drops to ~420 W (70% of rated value), and at 125 °C, it falls to ~240 W (40%). This derating applies to repetitive surge conditions; single-event capability remains intact. Designers must ensure thermal management - such as adequate copper area and airflow - maintains junction temperature below 150 °C during worst-case surge repetition.
P6SMB91CAHE3_A/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:
- Obsolete
- 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_A/I FAQ
1.How can I place an order for P6SMB91CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB91CAHE3_A/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 P6SMB91CAHE3_A/I reliable?
The price and inventory of P6SMB91CAHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB91CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for P6SMB91CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB91CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB91CAHE3_A/I?
P6SMB91CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB91CAHE3_A/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 P6SMB91CAHE3_A/I?
For technical support, including P6SMB91CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB91CAHE3_A/I requirements.
6.How does Aetrix verify that P6SMB91CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All P6SMB91CAHE3_A/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 P6SMB91CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of P6SMB91CAHE3_A/I?
All P6SMB91CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB91CAHE3_A/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 P6SMB91CAHE3_A/I part is unused and in its original packaging.
Return procedure for P6SMB91CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB91CAHE3_A/I Tags
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