My Inquiry
My Account
Vishay General Semiconductor - Diodes Division P6SMB91AHM3_B/I
- Part No.:
- P6SMB91AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB91AHM3_B/I.pdf
- Description:
- 600W,91V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:4,583
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P6SMB91AHM3_B/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal 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 rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.
For engineers reviewing the P6SMB91AHM3_B/I datasheet, P6SMB91AHM3_B/I pinout, P6SMB91AHM3_B/I application, or P6SMB91AHM3_B/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification (HM3 suffix), halogen-free RoHS compliance, MSL Level 1 moisture sensitivity, and thermal resistance (RθJA = 100 °C/W) for PCB-level surge protection design.
Technical Context
This TVS diode operates as a voltage-clamping device triggered by transient overvoltage events. Its glass-passivated junction ensures stable reverse leakage (<1 μA at VWM) and fast response time (<1 ns), enabling effective suppression of ESD, lightning-induced surges, and inductive switching spikes.
The device is rated for 100 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), supports continuous power dissipation of 5.0 W at 50 °C on infinite heatsink, and maintains operation across -65 °C to +150 °C junction temperature range - critical for under-hood automotive and industrial control environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 77.8 V - maximum continuous reverse operating voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (Breakdown) | 86.5–95.5 V at 1 mA - precise voltage threshold where avalanche conduction initiates; tight tolerance enables predictable protection onset. |
| VC (Clamping) | 125 V at 4.8 A IPPM - maximum voltage seen by protected circuit during 10/1000 μs surge; determines stress on downstream components. |
| PPPM | 600 W - peak transient energy absorption capability with standard 10/1000 μs waveform; validates robustness against IEC 61000-4-5 surges. |
| RθJA | 100 °C/W - thermal resistance from junction to ambient air; informs PCB copper pad sizing and layout for thermal reliability. |
| TJ max. | +150 °C - maximum allowable junction temperature; supports high-temperature environments including automotive engine compartments. |
| AEC-Q101 | Qualified - certified for automotive-grade reliability per JESD22-A108; required for powertrain, body electronics, and ADAS subsystems. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / reverse voltage reference | Connected to lower-potential side (e.g., ground or return path); defines unidirectional conduction direction. |
| Cathode | Avalanche clamping node / transient sink | Connected to protected line (e.g., 12 V rail or signal input); conducts surge current to anode during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Enables single-device protection against severe transients per IEC 61000-4-5 Level 4 (4 kV surge) without cascaded stages. |
| Glass passivated junction | Ensures long-term stability of VBR and low leakage (<1 μA) across temperature and lifetime, critical for safety-critical systems. |
| AEC-Q101 qualified (HM3) | Validates reliability for automotive applications including engine control units, infotainment power rails, and sensor supply lines. |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow soldering without preconditioning, reducing manufacturing complexity and cost. |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for global OEMs and industrial equipment sold in EU, China, and North America. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-supplied ECUs from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between power input and bulk capacitor. Use Value: Limits transient voltage to ≤125 V, preventing damage to LDOs, microcontrollers, and CAN transceivers downstream. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF) clamping element on signal line near connector entry point. Use Value: Maintains signal integrity while absorbing ±15 kV contact ESD per IEC 61000-4-2 without latch-up or parametric shift. |
| Telecom DC Power Input Protection | Consumer Device USB Power Line Protection |
|
Use Scenario: Safeguarding PoE-powered switches and base stations from induced surges on 48 V DC inputs. IC Role / Device Role / Timing Role: Primary surge suppression stage upstream of DC-DC converters and hot-swap controllers. Use Value: Handles repetitive 600 W pulses with 0.01% duty cycle, sustaining protection during sustained lightning-induced grid disturbances. |
Use Scenario: Preventing USB-C port damage from accidental 20 V adapter misconnection or external surge coupling. IC Role / Device Role / Timing Role: Stand-off-rated clamping diode on VBUS line, coordinated with internal OVP and current limiting. Use Value: Clamps to 125 V before USB controller IC reaches absolute maximum ratings, preserving system-level fault tolerance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ90A-E3/5B | Same SMB package, 90 V VBR min (85.5–94.5 V), 125 V VC at 4.8 A, but not AEC-Q101 qualified; commercial-grade only. | Lacks automotive qualification; suitable for industrial/commercial power supplies where AEC-Q101 is not mandated. | Select when cost sensitivity outweighs automotive reliability requirements and full qualification documentation is unnecessary. |
| 1.5SMC91A | Higher-power SMC package (1500 W PPPM), same 91 V nominal rating, 125 V VC, but larger footprint and higher RθJA (50 °C/W). | Requires more PCB area and offers lower thermal efficiency per unit volume; better for high-energy, low-frequency surges. | Choose when surge energy exceeds 600 W capability or when board space allows larger SMC footprint for enhanced margin. |
Compared with SMAJ90A-E3/5B, P6SMB91AHM3_B/I adds AEC-Q101 qualification and halogen-free compliance for automotive use; versus 1.5SMC91A, it trades peak power for compact SMB size and superior manufacturability in dense layouts.
Availability
P6SMB91AHM3_B/I is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom DC input surge suppression requiring stable component supply, traceable sourcing, and long-term lifecycle support.
Supply support for P6SMB91AHM3_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, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, precision, and application-specific performance.
The P6SMB Series targets high-reliability transient suppression in automotive, industrial, and telecom infrastructure - engineered for robust clamping, low leakage, and seamless SMT integration in mission-critical power domains.
FAQ
What is the clamping voltage of P6SMB91AHM3_B/I under standard surge conditions?
The P6SMB91AHM3_B/I exhibits a maximum clamping voltage (VC) of 125 V when subjected to its rated 4.8 A peak pulse current (IPPM) using the industry-standard 10/1000 μs waveform. This value is measured at TA = 25 °C with specified mounting conditions (0.2" × 0.2" copper pads), and defines the upper voltage limit imposed on protected circuits during transient events. The P6SMB91AHM3_B/I maintains this clamping performance consistently due to its glass-passivated junction and low incremental surge resistance.
Is P6SMB91AHM3_B/I suitable for automotive applications?
Yes, P6SMB91AHM3_B/I is AEC-Q101 qualified (indicated by the HM3 suffix and _B revision code), making it suitable for automotive applications including engine control modules, body electronics, and ADAS power supplies. It meets stringent reliability requirements for temperature cycling, humidity, and mechanical shock, and is halogen-free and RoHS-compliant - fulfilling Tier 1 supplier compliance mandates. The P6SMB91AHM3_B/I operates reliably from -65 °C to +150 °C junction temperature, supporting under-hood deployment.
How does the SMB package of P6SMB91AHM3_B/I compare to larger TVS packages like SMC?
The SMB (DO-214AA) package of P6SMB91AHM3_B/I measures 3.94 mm × 2.20 mm × 1.52 mm, offering significantly smaller footprint and lower profile than SMC packages - ideal for space-constrained PCBs in automotive ECUs and portable industrial sensors. While SMC variants (e.g., 1.5SMC91A) deliver higher 1500 W peak power, the P6SMB91AHM3_B/I's 600 W rating suffices for most ISO 7637-2 and IEC 61000-4-5 Level 3–4 applications, with improved thermal performance per unit area due to optimized pad layout and RθJA = 100 °C/W.
What is the meaning of the "_B/I" suffix in P6SMB91AHM3_B/I?
The "_B" in P6SMB91AHM3_B/I denotes AEC-Q101 qualification for the P6SMB series up to 220 V VWM, while "/I" specifies packaging in 13-inch diameter plastic tape and reel with 3200 units per reel - optimized for high-volume SMT assembly. The "HM3" prefix confirms halogen-free, RoHS-compliant construction with JESD201 Class 2 whisker resistance. Together, P6SMB91AHM3_B/I identifies a fully qualified, production-ready automotive-grade TVS diode with verified traceability and logistics compatibility.
Can P6SMB91AHM3_B/I be used in bidirectional configurations?
No, P6SMB91AHM3_B/I is a unidirectional TVS diode, as confirmed by its "A" suffix (per Vishay's naming convention) and cathode-band marking. Bidirectional variants use "CA" suffixes (e.g., P6SMB91CA). Using P6SMB91AHM3_B/I in bidirectional signal paths would result in forward conduction during negative transients, causing failure. For AC or differential-line protection, select a verified bidirectional part - the P6SMB91AHM3_B/I must be oriented with cathode toward the protected line and anode to reference potential.
P6SMB91AHM3_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:
- 1
- Bidirectional Channels:
- -
- 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)
P6SMB91AHM3_B/I FAQ
1.How can I place an order for P6SMB91AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB91AHM3_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 P6SMB91AHM3_B/I reliable?
The price and inventory of P6SMB91AHM3_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 P6SMB91AHM3_B/I is usually 5 days.
3.What payment methods are accepted for P6SMB91AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB91AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB91AHM3_B/I?
P6SMB91AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB91AHM3_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 P6SMB91AHM3_B/I?
For technical support, including P6SMB91AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB91AHM3_B/I requirements.
6.How does Aetrix verify that P6SMB91AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All P6SMB91AHM3_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 P6SMB91AHM3_B/I meets industry standards.
7.What is the process for return or replacement of P6SMB91AHM3_B/I?
All P6SMB91AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB91AHM3_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 P6SMB91AHM3_B/I part is unused and in its original packaging.
Return procedure for P6SMB91AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB91AHM3_B/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
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
