My Inquiry
My Account
Vishay General Semiconductor - Diodes Division P6SMB91A-M3/5B
;;2.jpg)
- Part No.:
- P6SMB91A-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB91A-M3/5B.pdf
- Description:
- TVS DIODE 77.8VWM 125VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,531
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P6SMB91A-M3/5B from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 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, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed to safeguard MOSFETs, ICs, and sensor interfaces against inductive switching transients in industrial power supplies.
For engineers reviewing the P6SMB91A-M3/5B datasheet, P6SMB91A-M3/5B pinout, P6SMB91A-M3/5B application, or P6SMB91A-M3/5B equivalent, key selection criteria include its unidirectional polarity, SMB (DO-214AA) package compatibility, 77.8 V stand-off voltage (VWM), <1 µs response time, and halogen-free RoHS-compliant construction per M3 suffix.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 µA leakage at 77.8 V), then rapidly avalanches below 125 V to divert surge energy away from downstream circuitry. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance.
The device is rated for 150 °C maximum junction temperature, exhibits a +0.106 %/°C VBR temperature coefficient, and meets J-STD-020 MSL Level 1 with 260 °C lead-free reflow peak - confirming suitability for automated SMT assembly without moisture sensitivity concerns.
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 avalanche onset window for reliable clamping threshold control |
| VWM | 77.8 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA, ensuring no false triggering |
| VC @ IPPM | 125 V at 4.8 A - clamping voltage during full 600 W transient, limiting protected node stress to safe margin below IC absolute max ratings |
| PPPM | 600 W - peak pulse power handling with 10/1000 µs waveform, enabling protection against IEC 61000-4-5 Level 4 surges |
| RθJA | 100 °C/W - thermal resistance from junction to ambient on standard 0.2" × 0.2" copper pads, guiding PCB thermal layout requirements |
| TJ max | 150 °C - maximum junction temperature, supporting operation in industrial environments up to 85 °C ambient with derating |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant (M3 suffix), matte tin-plated leads solderable per J-STD-002. Cathode indicated by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to system ground or low-side reference in unidirectional TVS configuration | Provides return path for surge current during clamping; must be routed with low-inductance connection to ground plane |
| Cathode | Protected line connection; marked with band; reverse-biased during normal operation | Connected directly to the line being protected (e.g., 48 V rail, CAN-H, sensor output); avalanche initiates here during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables single-device protection against severe transients including lightning-induced surges per IEC 61000-4-5 |
| Glass passivated junction | Ensures long-term stability of VBR and low leakage drift across temperature and lifetime |
| MSL Level 1, 260 °C peak reflow | Eliminates pre-baking requirement and supports standard lead-free SMT processes without moisture-related failures |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<10 ns), improving protection margin for sensitive logic |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module (BCM) Inputs |
|---|---|
|
Use Scenario: 24 V DC input stage of programmable logic controller (PLC) power module exposed to load dump and relay coil flyback. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between input rail and chassis ground to clamp transients before they reach DC-DC converter ICs. Use Value: Clamps 100 V transients to ≤125 V within <1 µs, preventing damage to 150 V-rated MOSFETs and maintaining system uptime. |
Use Scenario: LIN bus or sensor supply line in BCM subjected to ISO 7637-2 Pulse 1/2a/3a transients during vehicle cranking and alternator load dump. IC Role / Device Role / Timing Role: Standoff protection device on 12 V sensor VCC rail, absorbing negative-going spikes and positive surges without affecting normal 77.8 V operating margin. Use Value: Maintains signal integrity during ESD and load dump events while adding zero capacitance loading to 20 kbps LIN communication. |
| Telecom Interface Surge Protection | Motor Drive Gate Driver Protection |
|
Use Scenario: DC power feed to remote radio unit (RRU) base station powered via PoE-like 48 V backplane, vulnerable to induced lightning surges. IC Role / Device Role / Timing Role: Primary front-end TVS on 48 V input, coordinated with secondary GDT or MOV for staged clamping. Use Value: Limits let-through voltage to <125 V during 600 W surges, protecting downstream PMICs and isolators rated for 130 V abs max. |
Use Scenario: High-side gate drive supply (e.g., bootstrap capacitor rail) in 3-phase inverter exposed to Miller-induced voltage spikes during IGBT/MOSFET switching. IC Role / Device Role / Timing Role: Fast-response clamping element across gate driver VDD–GND, suppressing dv/dt-induced false turn-on. Use Value: Sub-µs response prevents >100 V overshoot on 15 V gate supply, avoiding unintended conduction and shoot-through failure. |
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 | Same SMB package, 90 V VBR (85.5–94.5 V), 129 V VC @ 4.7 A, 400 W PPPM | Lower peak power rating limits use in high-energy surge environments (e.g., outdoor telecom); suitable for cost-sensitive consumer-grade designs | Select SMAJ90A only when 400 W surge capacity suffices and tighter VBR tolerance is not required. |
| 1.5SMC91A | Same VBR/VC specs but in larger SMC (DO-214AB) package; 1000 W PPPM; higher thermal mass | Requires larger PCB footprint; better suited for high-reliability industrial systems needing extended surge endurance or higher IPPM margin | Choose 1.5SMC91A where board space allows and multi-event surge immunity (e.g., repeated motor starts) is critical. |
Compared with SMAJ90A and 1.5SMC91A, P6SMB91A-M3/5B delivers optimal balance of 600 W surge capability, SMB footprint efficiency, and halogen-free compliance - making it preferred for space-constrained industrial and automotive modules requiring AEC-Q101-compatible construction without SMC-level board area penalty.
Availability
P6SMB91A-M3/5B is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, telecom interface protection, and motor drive gate driver circuits requiring stable component supply with halogen-free, RoHS-compliant construction.
Supply support for P6SMB91A-M3/5B 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, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, power handling, and automotive qualification.
The P6SMB Series targets high-energy transient suppression in compact SMT formats, engineered specifically for industrial automation, automotive ECUs, and telecom infrastructure where robustness, repeatability, and MSL-1 process compatibility are mandatory.
FAQ
What is the standoff voltage (VWM) of the P6SMB91A-M3/5B?
The P6SMB91A-M3/5B has a maximum reverse stand-off voltage (VWM) of 77.8 V at 25 °C. This value ensures the device remains non-conductive during normal operation while allowing up to 1.0 µA leakage current - critical for preserving signal integrity on protected lines such as 48 V power rails or sensor outputs where false triggering must be avoided. The P6SMB91A-M3/5B maintains this specification across its qualified temperature range.
Is the P6SMB91A-M3/5B AEC-Q101 qualified?
No, the P6SMB91A-M3/5B is not AEC-Q101 qualified. Its M3 suffix denotes halogen-free, RoHS-compliant commercial-grade construction. For AEC-Q101 qualification, Vishay offers the P6SMB91AHM3_B variant (with "_B" revision code), which undergoes additional automotive stress testing. Engineers selecting P6SMB91A-M3/5B should verify that their application's reliability requirements align with commercial-grade qualification, especially in non-automotive industrial or telecom contexts.
What does the "/5B" suffix indicate in P6SMB91A-M3/5B?
The "/5B" suffix in P6SMB91A-M3/5B specifies packaging: 13-inch diameter plastic tape and reel containing 3200 units. This format supports high-volume automated pick-and-place assembly. The "M3" prefix confirms halogen-free, RoHS-compliant materials, while "5B" is distinct from "52" (7-inch reel, 750 units). Both share identical electrical and thermal specifications - only logistics and reel configuration differ.
How does the P6SMB91A-M3/5B compare to bidirectional TVS diodes like P6SMB91CA?
The P6SMB91A-M3/5B is unidirectional and features a cathode band marking; it conducts only in reverse avalanche and blocks forward current. In contrast, P6SMB91CA is bidirectional with symmetrical clamping in both polarities and no polarity marking. Use P6SMB91A-M3/5B on DC lines referenced to ground (e.g., 24 V supply), and P6SMB91CA on AC-coupled or floating signal lines (e.g., RS-485, CAN). Their VBR, VC, and PPPM values are otherwise matched within the same series.
What is the maximum clamping voltage (VC) of the P6SMB91A-M3/5B under surge conditions?
The P6SMB91A-M3/5B has a maximum clamping voltage (VC) of 125 V at 4.8 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value represents the upper limit of voltage imposed on the protected circuit during worst-case transient events. Designers use this parameter to verify that downstream components - such as MOSFETs, gate drivers, or interface ICs - remain within their absolute maximum voltage ratings when the P6SMB91A-M3/5B is actively clamping.
P6SMB91A-M3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- P6SMB, TransZorb®
- Packaging:
- Tape & Box (TB)
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
P6SMB91A-M3/5B FAQ
1.How can I place an order for P6SMB91A-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB91A-M3/5B 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 P6SMB91A-M3/5B reliable?
The price and inventory of P6SMB91A-M3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB91A-M3/5B is usually 5 days.
3.What payment methods are accepted for P6SMB91A-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB91A-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB91A-M3/5B?
P6SMB91A-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB91A-M3/5B 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 P6SMB91A-M3/5B?
For technical support, including P6SMB91A-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB91A-M3/5B requirements.
6.How does Aetrix verify that P6SMB91A-M3/5B is sourced from the original manufacturer or authorized distributors?
All P6SMB91A-M3/5B 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 P6SMB91A-M3/5B meets industry standards.
7.What is the process for return or replacement of P6SMB91A-M3/5B?
All P6SMB91A-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB91A-M3/5B, 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 P6SMB91A-M3/5B part is unused and in its original packaging.
Return procedure for P6SMB91A-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB91A-M3/5B 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 …
