My Inquiry
My Account
Vishay General Semiconductor - Diodes Division P6SMB91CAHM3/I
- Part No.:
- P6SMB91CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB91CAHM3/I.pdf
- Description:
- TVS DIODE 77.8VWM 125VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,440
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P6SMB91CAHM3/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), 125 V maximum clamping voltage (VC) at 4.8 A peak pulse current, and 600 W peak pulse power capability with a 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial systems.
For engineers reviewing the P6SMB91CAHM3/I datasheet, P6SMB91CAHM3/I pinout, P6SMB91CAHM3/I application, or P6SMB91CAHM3/I equivalent, key selection criteria include bidirectional clamping behavior, SMB (DO-214AA) package compatibility, AEC-Q101 qualification status, and thermal resistance (RθJA = 100 °C/W) under PCB pad-limited conditions.
Technical Context
This device operates as a voltage-clamped shunt protector: when reverse (or forward, in bidirectional mode) transient voltage exceeds its breakdown threshold (86.5–95.5 V), it avalanches to limit downstream voltage to ≤125 V. Its low incremental surge resistance and fast response time ensure effective suppression of ESD, lightning-induced surges, and inductive switching spikes.
Designed for surface-mount assembly on standard 0.2" × 0.2" copper pads per terminal, the P6SMB91CAHM3/I delivers 600 W peak pulse power at TA = 25 °C, derating linearly above that temperature per Fig. 2. It meets J-STD-020 MSL Level 1 and JESD 201 Class 2 whisker resistance requirements, with halogen-free, RoHS-compliant construction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 86.5 V min. to 95.5 V max. at 1.0 mA test current - defines precise avalanche onset for reliable clamping initiation |
| Stand-off Voltage VWM | 77.8 V - maximum continuous reverse working voltage before leakage exceeds 1.0 μA |
| Clamping Voltage VC | 125 V at 4.8 A peak pulse current (10/1000 μs) - limits protected circuit voltage during surge events |
| Peak Pulse Power PPPM | 600 W - energy-handling capacity for transient suppression without failure under standardized waveform |
| Junction Temperature Range | −65 °C to +150 °C - supports operation in under-hood automotive and high-ambient industrial environments |
| Thermal Resistance RθJA | 100 °C/W - determines junction-to-ambient temperature rise under steady-state power dissipation (5.0 W) |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, matte tin-plated terminals solderable per J-STD-002 and JESD 22-B102. Bidirectional configuration has no polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; one side of bidirectional clamping path | Connects to line being protected; forms symmetrical avalanche path with cathode during either polarity transient |
| Cathode | Current exit point in forward bias; second side of bidirectional clamping path | Connects to reference (e.g., ground or rail); completes low-impedance shunt path during overvoltage event |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 600 W peak pulse power (10/1000 μs) | Handles high-energy transients common in automotive load-dump and industrial motor-switching environments |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive electronics use including engine control units, ADAS sensors, and body controllers |
| Low profile SMB package | 0.130" × 0.205" footprint enables dense PCB layouts while maintaining thermal performance on minimal copper pads |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and reflow without baking, simplifying SMT manufacturing flow |
Applications
| Automotive Sensor Interface Protection | Industrial PLC I/O Module Protection |
|---|---|
|
Use Scenario: Protecting CAN, LIN, or analog sensor signal lines (e.g., pressure, temperature) from ESD and load-dump transients in vehicle ECUs. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed across differential or single-ended signal pair to clamp overvoltage before reaching receiver IC. Use Value: Prevents latch-up or permanent damage to automotive-grade microcontrollers and transceivers operating at 5 V or 3.3 V rails. |
Use Scenario: Safeguarding digital input/output channels in programmable logic controllers exposed to relay coil flyback and field wiring surges. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing >1 kV transients induced by inductive switching in factory automation equipment. Use Value: Eliminates need for external RC snubbers or optocoupler isolation on 24 V DC I/O lines, reducing BOM count and board space. |
| Telecom Line Card Surge Protection | Consumer Appliance Motor Drive Protection |
|
Use Scenario: Shielding Ethernet PHY interfaces and PoE-powered circuits from lightning-induced surges on outdoor telecom infrastructure. IC Role / Device Role / Timing Role: Primary-level clamping device on RJ45 port side, coordinated with secondary GDT or polymer-based protectors. Use Value: Limits let-through voltage to <125 V, ensuring compliance with IEC 61000-4-5 Level 4 (4 kV) immunity requirements. |
Use Scenario: Suppressing commutation spikes generated by brushed DC motors in washing machines, vacuum cleaners, and power tools. IC Role / Device Role / Timing Role: Mounted across motor terminals or H-bridge outputs to clamp inductive kickback during PWM switching. Use Value: Extends lifespan of MOSFET half-bridges and prevents false triggering of overvoltage protection in motor driver ICs. |
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 90 V VWM, but lower 400 W PPPM; SMA package (smaller footprint, higher RθJA) | Limited to lower-energy transients; unsuitable for AEC-Q101 automotive use | Select when board space is constrained and surge energy is ≤400 W; verify thermal margin on 0.1" pads |
| 1.5KE91CA | Through-hole DO-201 package; identical 91 V VBR and 125 V VC, but 1500 W PPPM | Requires wave soldering or hand assembly; not suitable for automated SMT lines | Choose for legacy through-hole designs or where higher surge margin justifies manual assembly cost |
Compared with SMAJ90CA and 1.5KE91CA, the P6SMB91CAHM3/I uniquely combines AEC-Q101 qualification, 600 W surge rating, and SMB surface-mount compatibility - making it optimal for new automotive and industrial SMT designs requiring production scalability and automotive reliability.
Availability
P6SMB91CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O protection, and telecom line card surge suppression requiring stable component supply across extended product lifecycles.
Supply support for P6SMB91CAHM3/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, efficiency, and application-specific optimization.
The P6SMB Series targets high-reliability transient suppression in automotive, industrial, and telecom applications - engineered for robust clamping performance, AEC-Q101 compliance, and seamless SMT integration.
FAQ
What does the "CA" suffix indicate in P6SMB91CAHM3/I?
The "CA" suffix denotes a bidirectional configuration: the P6SMB91CAHM3/I provides symmetrical clamping for both positive and negative transients without polarity dependence. Unlike unidirectional variants (e.g., P6SMB91AHM3/I), it has no cathode band marking and functions identically in either orientation - essential for protecting AC-coupled or floating signal paths.
Is P6SMB91CAHM3/I suitable for automotive applications?
Yes - the "HM3" suffix confirms halogen-free, RoHS-compliant construction and AEC-Q101 qualification. The P6SMB91CAHM3/I has passed stress tests including temperature cycling, high-temperature reverse bias, and ESD per AEC-Q101 Rev D, making it approved for under-hood and cabin electronics such as body control modules and ADAS sensor interfaces.
What is the maximum clamping voltage of P6SMB91CAHM3/I and under what condition is it specified?
The maximum clamping voltage of P6SMB91CAHM3/I is 125 V, measured at 4.8 A peak pulse current using the standardized 10/1000 μs double-exponential waveform. This value represents the upper limit of voltage imposed on protected circuitry during a worst-case transient event, directly enabling system-level overvoltage design margining.
How does the SMB package of P6SMB91CAHM3/I compare thermally to larger packages like DO-201?
The SMB (DO-214AA) package of P6SMB91CAHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads - higher than DO-201's ~50 °C/W. This requires careful PCB layout with adequate copper area to maintain junction temperature below 150 °C during repetitive surges, especially in high-ambient environments.
Can P6SMB91CAHM3/I replace P6SMB91A in an existing design?
No - P6SMB91CAHM3/I is bidirectional, while P6SMB91A is unidirectional with a marked cathode. Substituting them requires verifying circuit topology: P6SMB91CAHM3/I may be used only where bidirectional clamping is acceptable (e.g., across differential pairs or AC signals); replacing P6SMB91A on DC rails risks improper conduction during forward bias unless polarity is confirmed neutral.
P6SMB91CAHM3/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:
- 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:
- 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/I FAQ
1.How can I place an order for P6SMB91CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB91CAHM3/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 P6SMB91CAHM3/I reliable?
The price and inventory of P6SMB91CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB91CAHM3/I is usually 5 days.
3.What payment methods are accepted for P6SMB91CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB91CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB91CAHM3/I?
P6SMB91CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB91CAHM3/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 P6SMB91CAHM3/I?
For technical support, including P6SMB91CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB91CAHM3/I requirements.
6.How does Aetrix verify that P6SMB91CAHM3/I is sourced from the original manufacturer or authorized distributors?
All P6SMB91CAHM3/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 P6SMB91CAHM3/I meets industry standards.
7.What is the process for return or replacement of P6SMB91CAHM3/I?
All P6SMB91CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB91CAHM3/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 P6SMB91CAHM3/I part is unused and in its original packaging.
Return procedure for P6SMB91CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB91CAHM3/I Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
