My Inquiry
My Account
Vishay General Semiconductor - Diodes Division P6SMB91AHM3_A/I
- Part No.:
- P6SMB91AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB91AHM3_A/I.pdf
- Description:
- TVS DIODE 77.8VWM 125VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,906
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P6SMB91AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in 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 MOSFETs, ICs, and sensor signal lines against inductive switching transients and ESD in industrial and automotive electronics.
For engineers reviewing the P6SMB91AHM3_A/I datasheet, P6SMB91AHM3_A/I pinout, P6SMB91AHM3_A/I application, or P6SMB91AHM3_A/I equivalent, this part delivers AEC-Q101 qualified transient suppression with halogen-free RoHS compliance, MSL Level 1 moisture sensitivity, and verified clamping performance under repetitive surge conditions - critical for robust front-end protection in 24 V/48 V DC systems.
Technical Context
This TVS operates as a unidirectional avalanche clamp: reverse-biased during normal operation with ≤1.0 µA leakage at 77.8 V stand-off (VWM), then rapidly avalanches to limit transient voltages to ≤125 V at 4.8 A. Its glass-passivated junction ensures stable breakdown and low incremental surge resistance.
Designed for automated SMT assembly on standard PCB pads (0.2" × 0.2" copper), it sustains 100 A non-repetitive forward surge (8.3 ms half-sine) and operates from −65 °C to +150 °C junction temperature, with thermal resistance RθJA = 100 °C/W and RθJL = 20 °C/W - enabling reliable thermal management without heatsinking in space-constrained layouts.
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 range for predictable clamping threshold |
| VWM | 77.8 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 125 V at 4.8 A (10/1000 µs) - peak voltage seen by protected circuit during worst-case surge |
| PPPM | 600 W - peak transient power handling capability under standardized surge waveform |
| IFSM | 100 A - surge current rating for 8.3 ms half-sine wave, supporting high-energy inductive kick protection |
| TJ max | +150 °C - enables use in under-hood automotive and industrial environments without derating |
| Package | SMB (DO-214AA) - industry-standard 2-pin surface-mount outline with 0.220" x 0.130" footprint and MSL Level 1 rating |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, unidirectional polarity indicated by cathode band. Matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or lower-potential rail; conducts during forward surge events (e.g., reverse battery protection) |
| Cathode | Avalanche clamping terminal | Connected to protected line (e.g., 24 V supply or sensor input); clamps transients above VWM to VC |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance - supports under-hood and ADAS applications |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets global environmental regulations without compromising surge robustness or thermal performance |
| 600 W peak pulse power (10/1000 µs) | Handles high-energy transients from relay coils, solenoids, and motor drivers without degradation |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes overvoltage stress on downstream ICs - critical for 3.3 V/5 V logic and precision analog circuits |
| MSL Level 1 (260 °C peak reflow) | Compatible with standard lead-free SMT reflow profiles without pre-baking or special handling |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 24 V supply rails in body control modules against load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery feed and LDO input to clamp surges up to 125 V. Use Value: Prevents LDO failure and microcontroller brownout during ISO 7637-2 Pulse 5a events with no additional filtering required. |
Use Scenario: Shielding 4–20 mA current loop inputs in PLC analog I/O modules from field wiring transients. IC Role / Device Role / Timing Role: Cathode tied to signal line, anode to ground - clamps ESD and inductive spikes before they reach op-amp front-end. Use Value: Maintains signal integrity below 125 V clamping while adding <1 pF parasitic capacitance - avoids bandwidth reduction. |
| DC Motor Drive Gate Protection | Telecom Power Supply Input Stage |
|
Use Scenario: Safeguarding N-channel MOSFET gate drivers in brushed DC motor controllers exposed to back-EMF. IC Role / Device Role / Timing Role: Placed across gate-source terminals to suppress >100 V spikes induced by rapid current interruption. Use Value: Limits gate oxide stress to safe levels (<125 V) with sub-nanosecond response - prevents cumulative gate damage. |
Use Scenario: Front-end transient suppression on 48 V telecom rectifier outputs feeding PoE injectors and baseband processors. IC Role / Device Role / Timing Role: Unidirectional TVS on primary DC bus to absorb lightning-induced surges per IEC 61000-4-5 Level 3. Use Value: Delivers 600 W pulse handling with 125 V clamping - meets GR-1089-CORE surge immunity requirements without series impedance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ90A-E3/5B | Same VBR range (85.5–94.5 V), but lower PPPM = 400 W and higher VC = 139 V at 2.9 A | Limited to lower-energy transients; not AEC-Q101 qualified | Select when cost sensitivity outweighs automotive qualification and 600 W headroom |
| 1.5SMC91A | Identical VBR, VC, and PPPM, but in larger SMC (DO-214AB) package - 2.5× footprint area | Requires PCB layout change; better thermal dissipation only if board-level copper is minimal | Choose only if existing design uses SMC footprint or needs marginally improved RθJA (85 °C/W vs. 100 °C/W) |
Compared with SMAJ90A-E3/5B and 1.5SMC91A, the P6SMB91AHM3_A/I provides AEC-Q101 validation, halogen-free compliance, and SMB footprint efficiency - making it optimal for new automotive and space-constrained industrial designs requiring full 600 W surge margin without layout revision.
Availability
P6SMB91AHM3_A/I is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, DC motor drive gate protection, and telecom power supply input stage applications requiring stable component supply, AEC-Q101 traceability, and halogen-free compliance.
Supply support for P6SMB91AHM3_A/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, power efficiency, and automotive-grade validation.
The P6SMB Series targets high-reliability transient suppression in automotive, industrial, and telecom systems - engineered for consistent clamping performance, low leakage, and compatibility with automated SMT manufacturing.
FAQ
What is the maximum clamping voltage of the P6SMB91AHM3_A/I under a 10/1000 µs surge?
The P6SMB91AHM3_A/I has a maximum clamping voltage (VC) of 125 V at 4.8 A peak pulse current under the standardized 10/1000 µs waveform. This value is measured per Figure 1 in Vishay document 88370 and represents the highest voltage imposed on the protected circuit during a worst-case transient event. The P6SMB91AHM3_A/I maintains this clamping performance across its full operating temperature range.
Is the P6SMB91AHM3_A/I qualified for automotive applications?
Yes, the P6SMB91AHM3_A/I is AEC-Q101 qualified, as confirmed by its HM3 suffix and documentation in Vishay's P6SMB series datasheet (Rev. 09-Jan-2024, Doc. #88370). It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias, and surge endurance - making it suitable for under-hood and ADAS-related power and signal protection where P6SMB91AHM3_A/I reliability is mission-critical.
What does the "HM3" suffix indicate in P6SMB91AHM3_A/I?
The "HM3" suffix in P6SMB91AHM3_A/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. Per Vishay's ordering information, HM3 parts meet JESD 201 Class 2 whisker resistance and MSL Level 1 reflow compatibility (260 °C peak). This distinguishes P6SMB91AHM3_A/I from commercial-grade M3 or E3 variants and confirms its suitability for environmentally regulated and automotive-grade deployments.
How does the P6SMB91AHM3_A/I compare to bidirectional TVS diodes like P6SMB91CA?
The P6SMB91AHM3_A/I is unidirectional and intended for DC line protection where polarity is fixed (e.g., 24 V supply rails), offering lower leakage (<1.0 µA at 77.8 V) and tighter VBR tolerance than bidirectional equivalents. In contrast, P6SMB91CA supports AC or polarity-agnostic signals but exhibits higher leakage and dual-threshold behavior. Use P6SMB91AHM3_A/I when protecting single-polarity circuits requiring minimal standby current and precise clamping onset.
What is the thermal resistance of the P6SMB91AHM3_A/I, and how does it affect PCB layout?
The P6SMB91AHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead (RθJL) of 20 °C/W, measured on 0.2" × 0.2" copper pads per datasheet conditions. This means PCB layout must provide adequate copper area - especially on cathode/anode pads - to avoid exceeding +150 °C junction temperature during repetitive surges. The P6SMB91AHM3_A/I does not require external heatsinking if minimum pad dimensions are maintained.
P6SMB91AHM3_A/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:
- Obsolete
- 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_A/I FAQ
1.How can I place an order for P6SMB91AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB91AHM3_A/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_A/I reliable?
The price and inventory of P6SMB91AHM3_A/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_A/I is usually 5 days.
3.What payment methods are accepted for P6SMB91AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB91AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB91AHM3_A/I?
P6SMB91AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB91AHM3_A/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_A/I?
For technical support, including P6SMB91AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB91AHM3_A/I requirements.
6.How does Aetrix verify that P6SMB91AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All P6SMB91AHM3_A/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_A/I meets industry standards.
7.What is the process for return or replacement of P6SMB91AHM3_A/I?
All P6SMB91AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB91AHM3_A/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_A/I part is unused and in its original packaging.
Return procedure for P6SMB91AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB91AHM3_A/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 …
