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Vishay General Semiconductor - Diodes Division P6SMB91AHM3/H
- Part No.:
- P6SMB91AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB91AHM3/H.pdf
- Description:
- TVS DIODE 77.8VWM 125VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,569
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Product details
Overview
P6SMB91AHM3/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the P6SMB series, designed for clamping voltage transients on power and signal lines. It features a 91 V breakdown voltage (VBR = 86.5–95.5 V at IT = 1.0 mA), 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 industrial power supplies.
For engineers reviewing the P6SMB91AHM3/H datasheet, P6SMB91AHM3/H pinout, P6SMB91AHM3/H application, or P6SMB91AHM3/H equivalent, this device is selected for robust overvoltage protection where AEC-Q101 qualification, halogen-free RoHS compliance, and SMB (DO-214AA) package compatibility with automated SMT assembly are required.
Technical Context
The P6SMB91AHM3/H operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance, enabling precise clamping during fast transients (response time < 1 ns).
Thermal performance is defined by RθJA = 100 °C/W (junction-to-ambient, on 0.2" × 0.2" copper pads) and TJ(max) = 150 °C, supporting operation in ambient temperatures up to +125 °C after derating. The cathode band identifies polarity, critical for correct orientation in DC-biased protection circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 86.5 V / 95.5 V at IT = 1.0 mA - defines reliable conduction onset under transient stress |
| VWM | 77.8 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 μA |
| VC @ IPPM | 125 V at 4.8 A (10/1000 μs) - clamped voltage seen by protected circuit during worst-case surge |
| PPPM | 600 W - peak transient energy absorption capability without failure (0.01% duty cycle) |
| IFSM | 100 A (8.3 ms half-sine) - surge current handling for AC line or inductive switch-off events |
| TJ(max) | +150 °C - maximum junction temperature enabling use in high-temperature industrial enclosures |
| Package | SMB (DO-214AA) - standardized 2-pin surface-mount outline with 5.59 mm × 4.06 mm footprint |
Pinout & Package
SMB (DO-214AA) package: molded plastic case with matte tin-plated leads, MSL Level 1 (reflow peak 260 °C), UL 94 V-0 rated compound, and polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current path terminal | Connected to lower-potential side (e.g., ground or return) in unidirectional protection configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 48 V rail or sensor output); conducts when Vin > VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability (vibration, temperature cycling, HTRB) per P6SMB91AHM3/H suffix "HM3" |
| Halogen-free & RoHS-compliant | Meets JEDEC J-STD-609A Class 1 moisture sensitivity and EU RoHS Directive 2011/65/EU |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth, 2 kV line-line) without degradation |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes let-through voltage to preserve margin between clamped level and IC absolute max ratings |
| Glass passivated junction | Ensures stable leakage (<1.0 μA at VWM) and long-term parameter stability across thermal cycles |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: Protecting 48 V input rails in programmable logic controllers against load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and chassis ground to clamp transients above 77.8 V. Use Value: Limits peak voltage to 125 V during 600 W surges, preventing damage to downstream DC-DC converters rated for 130 V max input. |
Use Scenario: Safeguarding LIN bus transceivers and microcontroller I/O pins in BCM modules exposed to battery voltage fluctuations. IC Role / Device Role / Timing Role: Standoff-rated TVS on 12 V supply line, activated only during load dump (>20 V) or jump-start events. Use Value: AEC-Q101 qualification ensures operation across -40 °C to +125 °C ambient, meeting ISO 7637-2 Pulse 5a requirements. |
| Telecom Remote Radio Unit (RRU) | Industrial Sensor Signal Conditioning |
|
Use Scenario: Shielding Ethernet PHY power pins (3.3 V/5 V) from ESD and lightning-induced surges in outdoor base station equipment. IC Role / Device Role / Timing Role: Secondary-level TVS on intermediate supply rails, coordinated with primary MOVs for staged clamping. Use Value: 125 V clamping voltage provides ≥2× margin over 48 V nominal rail, allowing safe operation during combined surge/ESD events. |
Use Scenario: Protecting analog outputs of 4–20 mA current-loop sensors from wiring faults and field-induced transients. IC Role / Device Role / Timing Role: Low-leakage (≤1.0 μA) TVS on transmitter output, preserving loop accuracy while blocking >77.8 V faults. Use Value: Glass passivation maintains leakage stability over 10+ years in humid industrial environments, avoiding calibration drift. |
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 VWM (77 V), slightly lower VC (123 V), non-AEC-Q101, standard RoHS (not halogen-free) | Targeted at commercial-grade telecom and computing; lacks automotive qualification and halogen-free certification | Select when AEC-Q101 and halogen-free compliance are not required, and cost optimization is prioritized. |
| 1.5SMC91A | Same VBR range, higher VC (129 V), larger SMC (DO-214AB) package (7.11 mm × 6.22 mm), no AEC-Q101 option | Used where PCB space allows larger footprint and higher thermal mass is needed for repeated surge events | Choose only if board layout accommodates SMC package and thermal derating margins exceed those of SMB. |
Compared with SMAJ90A-E3/5B and 1.5SMC91A, P6SMB91AHM3/H uniquely combines AEC-Q101 qualification, halogen-free construction, and compact SMB packaging - making it the preferred choice for space-constrained, automotive-qualified, and environmentally regulated designs requiring 91 V clamping.
Availability
P6SMB91AHM3/H is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, telecom remote radio units, and industrial sensor signal conditioning requiring stable component supply with full traceability and lifecycle management.
Supply support for P6SMB91AHM3/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, TVS devices, and optoelectronics with emphasis on reliability and application-specific performance.
The P6SMB series was developed for high-energy transient suppression in space-constrained surface-mount applications, targeting automotive, industrial, and telecom systems needing robust, standardized, and qualification-ready protection components.
FAQ
What is the maximum clamping voltage of P6SMB91AHM3/H under a 10/1000 μs surge?
The maximum clamping voltage (VC) of P6SMB91AHM3/H is 125 V at 4.8 A peak pulse current with a 10/1000 μs waveform. This value is measured per Figure 1 in Vishay document 88370 and defines the upper voltage limit imposed on protected circuitry during standardized surge testing. It directly determines whether downstream components remain within their absolute maximum voltage ratings when P6SMB91AHM3/H activates.
Is P6SMB91AHM3/H suitable for automotive applications?
Yes, P6SMB91AHM3/H is AEC-Q101 qualified, as confirmed by the "HM3" suffix denoting halogen-free, RoHS-compliant, and automotive-grade construction. It meets stress tests including high-temperature reverse bias, temperature cycling, and unbiased highly accelerated stress testing - making P6SMB91AHM3/H appropriate for under-hood and body electronics where reliability across -40 °C to +125 °C is mandatory.
What does the "H" in P6SMB91AHM3/H indicate in the ordering code?
The "H" in P6SMB91AHM3/H specifies the packaging format: 7-inch diameter plastic tape and reel, with a standard quantity of 750 units per reel. This matches Vishay's ordering convention in Document 88370 Section "ORDERING INFORMATION", where "H" denotes the 7" reel variant - distinct from "I" (13" reel, 3200 units) and critical for SMT line feed compatibility and inventory planning for P6SMB91AHM3/H.
How does the SMB (DO-214AA) package of P6SMB91AHM3/H compare thermally to larger packages like SMC?
P6SMB91AHM3/H in SMB (DO-214AA) has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W on 0.2" × 0.2" copper pads, versus ~60 °C/W for SMC-packaged equivalents. This means P6SMB91AHM3/H requires stricter layout controls - such as minimum pad size and thermal vias - to maintain TJ ≤ 150 °C under repetitive surges. Its smaller footprint trades thermal capacity for board space savings, a key design trade-off in dense layouts.
What is the reverse leakage current specification for P6SMB91AHM3/H at its stand-off voltage?
P6SMB91AHM3/H exhibits a maximum reverse leakage current (ID) of 1.0 μA at its rated stand-off voltage (VWM = 77.8 V), measured at TA = 25 °C. This low leakage preserves signal integrity and minimizes standby power loss in high-impedance circuits - critical for battery-powered sensor nodes and precision analog front-ends where even nanoamp-level errors affect accuracy. The value is verified in Table "ELECTRICAL CHARACTERISTICS" of Vishay document 88370.
P6SMB91AHM3/H 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:
- 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/H FAQ
1.How can I place an order for P6SMB91AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB91AHM3/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 P6SMB91AHM3/H reliable?
The price and inventory of P6SMB91AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB91AHM3/H is usually 5 days.
3.What payment methods are accepted for P6SMB91AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB91AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB91AHM3/H?
P6SMB91AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB91AHM3/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 P6SMB91AHM3/H?
For technical support, including P6SMB91AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB91AHM3/H requirements.
6.How does Aetrix verify that P6SMB91AHM3/H is sourced from the original manufacturer or authorized distributors?
All P6SMB91AHM3/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 P6SMB91AHM3/H meets industry standards.
7.What is the process for return or replacement of P6SMB91AHM3/H?
All P6SMB91AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB91AHM3/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 P6SMB91AHM3/H part is unused and in its original packaging.
Return procedure for P6SMB91AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB91AHM3/H Tags
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