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Vishay General Semiconductor - Diodes Division P6SMB91CAHM3_B/H
- Part No.:
- P6SMB91CAHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB91CAHM3_B/H.pdf
- Description:
- 600W,91V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:7,496
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Product details
Overview
P6SMB91CAHM3_B/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMB (DO-214AA) package, rated for 91 V breakdown voltage (VBR = 86.5–95.5 V at IT = 1.0 mA), 125 V maximum clamping voltage (VC) at 4.8 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 µs waveform). It protects signal lines and power rails in automotive sensor units and industrial control interfaces against ESD and inductive switching transients.
For engineers reviewing the P6SMB91CAHM3_B/H datasheet, P6SMB91CAHM3_B/H pinout, P6SMB91CAHM3_B/H application, or P6SMB91CAHM3_B/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, and thermal resistance (RθJA = 100 °C/W) under standard PCB pad layout.
Technical Context
This device operates as a voltage-clamped surge protector with symmetrical reverse/forward conduction behavior due to its bidirectional construction. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM = 77.8 V), while the low incremental surge resistance enables rapid energy dissipation during transient events.
The P6SMB91CAHM3_B/H is designed for automated SMT placement on 0.2" × 0.2" copper pads per terminal and meets J-STD-020 MSL Level 1 (peak reflow ≤ 260 °C). Its 150 °C maximum junction temperature and 100 A IFSM rating support robust operation in automotive-grade environments where thermal cycling and repetitive surges are common.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 86.5 V / 95.5 V at 1.0 mA test current - defines precise voltage threshold for avalanche conduction onset in both directions |
| VWM | 77.8 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 125 V at 4.8 A - clamping voltage limiting downstream circuit stress during 10/1000 µs transients |
| PPPM | 600 W - peak surge power handling capacity under standardized unidirectional pulse waveform |
| IPPM | 4.8 A - maximum non-repetitive peak pulse current supported without degradation |
| RθJA | 100 °C/W - thermal resistance from junction to ambient air on standard 0.2" × 0.2" copper pads |
| TJ max. | +150 °C - maximum allowable junction temperature enabling use in under-hood automotive locations |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Cathode/anode terminals are functionally symmetric; device has two terminals only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Either terminal serves as input/output for transient suppression; no fixed polarity - connects to protected line and ground reference |
| Terminal 2 | Anode / Cathode (bidirectional) | Paired terminal completing the bidirectional clamp path; used in parallel across differential or single-ended signal/power lines |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and ADAS sensor interfaces |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for modern industrial and transportation electronics |
| 600 W peak pulse power | Withstands high-energy transients from inductive load switching (e.g., solenoids, relays) without failure |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes overvoltage stress on downstream ICs such as microcontrollers and CAN transceivers |
| MSL Level 1 moisture sensitivity | Enables standard reflow assembly without dry-pack or baking preconditioning |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine bay environments subject to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed between signal line and chassis ground to limit transient excursions to safe levels. Use Value: Prevents latch-up or permanent damage to 12-bit ADC front-ends by clamping transients to ≤125 V while maintaining <1.0 µA leakage at 77.8 V. |
Use Scenario: Shielding digital input channels of programmable logic controllers from relay coil flyback and EFT bursts in factory automation cabinets. IC Role / Device Role / Timing Role: Fast-response voltage limiter installed across each 24 V DC input terminal pair to suppress >1 kV spikes. Use Value: Ensures reliable operation of optocoupler-based isolation stages by holding clamped voltage below 125 V during 4.8 A surge events. |
| Telecom Line Interface | Consumer Power Adapter ESD Protection |
|
Use Scenario: Safeguarding RS-485 transceiver pins in base station backhaul equipment exposed to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Differential-mode TVS connected between A/B bus lines and ground to absorb common-mode transients. Use Value: Maintains signal integrity up to 10 Mbps by limiting capacitance to <100 pF and clamping within 1.5 ns response time. |
Use Scenario: Adding secondary-level surge immunity to USB-C PD adapter secondary-side outputs before connector interface. IC Role / Device Role / Timing Role: Low-leakage bidirectional suppressor placed across VBUS and GND to handle contact ESD per IEC 61000-4-2 ±8 kV. Use Value: Enables pass/fail compliance with Class B emissions and immunity standards without degrading efficiency or thermal performance. |
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 VBR range (85.5–94.5 V), lower PPPM (400 W), SMA package (smaller footprint, higher RθJA) | Limited to lower-energy transients; unsuitable for automotive load-dump scenarios requiring 600 W | Select when board space is constrained and surge energy does not exceed 400 W capability |
| SMCJ91CA | Same VBR (86.5–95.5 V), higher PPPM (1500 W), larger SMC package (DO-214AB), RθJA = 35 °C/W | Better thermal performance and surge margin but requires larger PCB area and different pad layout | Choose for high-reliability industrial systems where sustained surge duty cycles demand superior heat dissipation |
Compared with SMAJ90CA and SMCJ91CA, the P6SMB91CAHM3_B/H delivers optimal balance of 600 W surge capability, AEC-Q101 qualification, and SMB footprint compatibility-making it ideal for space-constrained automotive and industrial designs needing verified reliability without oversized packaging.
Availability
P6SMB91CAHM3_B/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O hardening, and telecom line interface applications requiring stable component supply and full traceability.
Supply support for P6SMB91CAHM3_B/H 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 application-specific validation.
The P6SMB Series targets high-volume, high-reliability transient suppression in automotive, industrial, and communications infrastructure-designed specifically for automated SMT assembly and harsh-environment operation.
FAQ
What is the breakdown voltage tolerance for P6SMB91CAHM3_B/H?
The P6SMB91CAHM3_B/H has a specified breakdown voltage range of 86.5 V to 95.5 V at 1.0 mA test current, corresponding to ±5% tolerance around the nominal 91 V rating. This tight VBR window ensures consistent clamping behavior across production lots and supports predictable system-level surge design margins in applications like automotive sensor interfaces where precise voltage thresholds are critical.
Is P6SMB91CAHM3_B/H suitable for automotive applications?
Yes, P6SMB91CAHM3_B/H is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction with automotive-grade reliability testing. It is explicitly rated for under-hood use with TJ max = +150 °C and validated for repetitive surge conditions typical of engine control and ADAS subsystems - making P6SMB91CAHM3_B/H appropriate for safety-critical automotive circuits requiring certified transient protection.
What is the maximum clamping voltage of P6SMB91CAHM3_B/H at rated peak pulse current?
The maximum clamping voltage (VC) of P6SMB91CAHM3_B/H is 125 V at 4.8 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value represents the upper limit of voltage seen by downstream components during worst-case transient events and is confirmed in the Vishay datasheet Table "ELECTRICAL CHARACTERISTICS" for part number P6SMB91CA. Designers use this parameter to verify that protected ICs remain within absolute maximum ratings.
Does P6SMB91CAHM3_B/H have polarity markings?
No, P6SMB91CAHM3_B/H is a bidirectional TVS diode and carries no polarity marking on the SMB (DO-214AA) package. Unlike unidirectional variants (e.g., P6SMB91A), the CA suffix indicates symmetrical conduction in both directions - meaning either terminal may connect to the protected line or ground reference without functional impact. This simplifies layout and eliminates orientation errors during automated placement.
What is the thermal resistance of P6SMB91CAHM3_B/H under standard mounting conditions?
The typical junction-to-ambient thermal resistance (RθJA) of P6SMB91CAHM3_B/H is 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, per Vishay's test condition in Document Number 88370. This value directly informs thermal design - for example, at 5.0 W steady-state power dissipation, the junction temperature rise would be 500 °C above ambient, confirming that P6SMB91CAHM3_B/H is intended for pulsed, not continuous, power handling.
P6SMB91CAHM3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- P6SMB, TransZorb®
- Packaging:
- Bulk
- Product Status:
- Active
- 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:
- 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)
P6SMB91CAHM3_B/H FAQ
1.How can I place an order for P6SMB91CAHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB91CAHM3_B/H 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 P6SMB91CAHM3_B/H reliable?
The price and inventory of P6SMB91CAHM3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB91CAHM3_B/H is usually 5 days.
3.What payment methods are accepted for P6SMB91CAHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB91CAHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB91CAHM3_B/H?
P6SMB91CAHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB91CAHM3_B/H 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 P6SMB91CAHM3_B/H?
For technical support, including P6SMB91CAHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB91CAHM3_B/H requirements.
6.How does Aetrix verify that P6SMB91CAHM3_B/H is sourced from the original manufacturer or authorized distributors?
All P6SMB91CAHM3_B/H 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 P6SMB91CAHM3_B/H meets industry standards.
7.What is the process for return or replacement of P6SMB91CAHM3_B/H?
All P6SMB91CAHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB91CAHM3_B/H, 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 P6SMB91CAHM3_B/H part is unused and in its original packaging.
Return procedure for P6SMB91CAHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB91CAHM3_B/H Tags
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