My Inquiry
My Account
Taiwan Semiconductor Corporation P6SMB91AH
- Part No.:
- P6SMB91AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB91AH.pdf
- Description:
- TVS DIODE 77.8VWM 125VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,668
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P6SMB91AH from Taiwan Semiconductor is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode with a breakdown voltage range of 86.5–95.5 V, clamping voltage of 125 V at 5.0 A peak pulse current, and stand-off voltage of 77.8 V. It features glass-passivated junction, AEC-Q101 qualification, and is designed for automotive and industrial ESD/inductive-spike protection in power supply rails and signal lines.
For engineers reviewing the P6SMB91AH datasheet, P6SMB91AH pinout, P6SMB91AH application, or P6SMB91AH equivalent, key selection criteria include its 125 V clamping performance at 5.0 A, 77.8 V working voltage, DO-214AA (SMB) package compatibility, and compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive transients.
Technical Context
The P6SMB91AH operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its minimum breakdown voltage (86.5 V), clamping transient energy within 1.0 ps response time. Its glass-passivated junction ensures stable leakage (<1 µA at 77.8 V) and long-term reliability under repeated surge stress.
Thermal design relies on RθJA = 55 °C/W and RθJC = 10 °C/W, supporting operation from –55 °C to +150 °C junction temperature. It meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1, enabling robust reflow assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 86.5 V / 95.5 V - defines reliable avalanche initiation window under 1.0 mA test current |
| VWM | 77.8 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VC @ IPPM | 125 V @ 5.0 A - peak clamped voltage during 10/1000 µs surge, limiting downstream IC stress |
| PPPSM | 600 W - non-repetitive peak pulse power handling per standard 10/1000 µs waveform |
| IR @ VWM | <1 µA - ultra-low reverse leakage preserves low-power circuit integrity |
| TJ max | +150 °C - enables placement near hot components in engine control or power conversion modules |
| Package | DO-214AA (SMB) - industry-standard 2-pin SMD footprint with 4.58 mm × 3.94 mm body and cathode band marking |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with matte tin-plated leads, polarity indicated by cathode band; weight ≈ 0.090 g; UL 94V-0 rated compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or lower-potential rail in unidirectional clamp configuration |
| Cathode | Avalanche clamping terminal | Connected to protected line (e.g., 24 V supply rail); conducts surge current to ground when VREV > VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood applications including temperature cycling, humidity, and mechanical shock |
| Glass-passivated junction | Enhances long-term stability of VBR and leakage under thermal stress and humidity exposure |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupling) |
| Fast 1.0 ps response | Clamps ESD and fast transients before sensitive logic or analog circuitry sustains damage |
| Moisture Sensitivity Level 1 | Zero bake requirement prior to reflow; supports standard SMT assembly without moisture-related popcorning |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V CAN bus power rail against load-dump transients and alternator ripple spikes in vehicle ECUs. IC Role / Device Role: Unidirectional TVS placed between VBAT and ground to clamp surges above 77.8 V while remaining inert during normal operation. Use Value: Limits peak rail voltage to 125 V during 600 W pulses, preventing overvoltage failure of downstream DC-DC converters and CAN transceivers. | Use Scenario: Safeguarding analog front-end inputs of pressure/temperature sensors in factory automation PLC modules. IC Role / Device Role: TVS mounted at connector entry point to shunt EFT bursts (IEC 61000-4-4) and cable discharge events. Use Value: Sub-1 µA leakage at 77.8 V avoids signal offset errors; 125 V clamping prevents ADC input saturation during 5 kV ESD contact discharge. |
| LED Driver Output Protection | Motor Control Gate Drive Clamp |
Use Scenario: Shielding constant-current LED driver outputs from inductive kickback when driving high-brightness LED strings. IC Role / Device Role: Unidirectional TVS connected across driver output and return to absorb flyback energy during MOSFET turn-off. Use Value: 125 V clamping voltage ensures gate drivers and current-sense amplifiers remain within absolute maximum ratings during 100 ns–1 µs switching transients. | Use Scenario: Clamping voltage spikes on half-bridge gate drive lines caused by parasitic inductance in high-speed motor inverters. IC Role / Device Role: TVS placed between gate and source of high-side MOSFET to suppress Miller-induced overshoot. Use Value: 86.5–95.5 V VBR range allows safe margin above typical 12 V or 15 V gate drive rails while triggering before gate oxide breakdown. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ91A | Same DO-214AA package; VBR = 96.7–107 V, VC = 139 V @ 4.3 A, PPPSM = 600 W | Higher clamping voltage reduces margin for 100 V-rated downstream components | Select SMBJ91A only if higher VBR tolerance is required to avoid false triggering near 91 V nominal rails |
| 1.5SMC91A | DO-214AB (SMC) package; larger footprint (7.11 mm × 6.22 mm); VBR = 96.7–107 V, VC = 139 V @ 4.3 A | Requires PCB layout change; better thermal dissipation but incompatible with SMB footprints | Choose 1.5SMC91A only when higher thermal mass or derated surge capability is needed and board space permits |
Compared with SMBJ91A and 1.5SMC91A, the P6SMB91AH offers tighter VBR (86.5–95.5 V) and lower clamping (125 V), delivering superior protection margin for 72–90 V systems while maintaining DO-214AA compatibility and AEC-Q101 qualification.
Availability
P6SMB91AH is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface protection, and LED driver output safeguarding requiring stable component supply and full traceability.
Supply support for P6SMB91AH 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for automotive, industrial, and consumer markets.
The P6SMB91AH belongs to TSC's AEC-Q101-qualified P6SMBx(A)H series of 600 W surface-mount TVS diodes, engineered specifically for robust transient immunity in harsh automotive and industrial environments.
FAQ
What is the clamping voltage of the P6SMB91AH under standard 10/1000 µs surge conditions?
The P6SMB91AH has a maximum clamping voltage (VC) of 125 V when subjected to a 5.0 A peak pulse current with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting for downstream circuitry during real-world transients such as load dump or EFT events.
Is the P6SMB91AH suitable for automotive applications?
Yes, the P6SMB91AH is AEC-Q101 qualified and meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements. Its DO-214AA package, –55 °C to +150 °C operating range, and glass-passivated junction make it suitable for under-hood and chassis-mounted automotive modules where reliability under thermal and mechanical stress is critical.
How does the P6SMB91AH differ from the P6SMB91H variant?
The P6SMB91AH has a tighter breakdown voltage range (86.5–95.5 V) versus P6SMB91H (81.9–100 V), achieved via enhanced process control. Both share identical package, power rating (600 W), and clamping performance (125 V vs. 131 V), but the 'A' suffix indicates improved VBR consistency-critical for designs requiring precise threshold control near 91 V nominal rails.
What is the maximum reverse leakage current for the P6SMB91AH at its stand-off voltage?
At its rated stand-off voltage (VWM) of 77.8 V, the P6SMB91AH exhibits a maximum reverse leakage current (IR) of 1 µA at 25 °C. This ultra-low leakage preserves signal integrity in high-impedance sensor interfaces and minimizes standby power loss in always-on automotive subsystems.
Does the P6SMB91AH require special handling during PCB assembly?
No-P6SMB91AH is rated MSL Level 1 per J-STD-020, meaning it can be stored indefinitely at ambient conditions and processed using standard lead-free reflow profiles without baking. Its matte tin-plated leads comply with J-STD-002 for solderability, and the DO-214AA package supports automated pick-and-place with high yield.
P6SMB91AH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- P6SMB
- 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):
- 5A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
P6SMB91AH FAQ
1.How can I place an order for P6SMB91AH through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB91AH 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 P6SMB91AH reliable?
The price and inventory of P6SMB91AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB91AH is usually 5 days.
3.What payment methods are accepted for P6SMB91AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB91AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB91AH?
P6SMB91AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB91AH 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 P6SMB91AH?
For technical support, including P6SMB91AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB91AH requirements.
6.How does Aetrix verify that P6SMB91AH is sourced from the original manufacturer or authorized distributors?
All P6SMB91AH 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 P6SMB91AH meets industry standards.
7.What is the process for return or replacement of P6SMB91AH?
All P6SMB91AH units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB91AH, 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 P6SMB91AH part is unused and in its original packaging.
Return procedure for P6SMB91AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB91AH 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
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…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
