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Taiwan Semiconductor Corporation P6SMB91H
- Part No.:
- P6SMB91H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB91H.pdf
- Description:
- 600W, 91V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:6,216
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Product details
Overview
P6SMB91H from Taiwan Semiconductor is a unidirectional 600W surface-mount Transient Voltage Suppressor (TVS) diode with a nominal breakdown voltage of 81.9–100 V, clamping voltage of 131 V at 4.8 A peak pulse current, and stand-off voltage of 73.7 V. It features glass-passivated junction, AEC-Q101 qualification, and is designed for automotive and industrial ESD/inductive transient protection in power supply rails and signal lines.
For engineers reviewing the P6SMB91H datasheet, P6SMB91H pinout, P6SMB91H application, or P6SMB91H equivalent, key selection criteria include its 131 V clamping performance at 4.8 A, 3.5 V forward voltage at 50 A, DO-214AA (SMB) package compatibility, and compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive load-dump immunity.
Technical Context
The P6SMB91H operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its minimum breakdown voltage (81.9 V) under 1 mA test current. Its clamping action limits transient energy to ≤131 V at 4.8 A (10/1000 μs waveform), enabling robust protection of downstream ICs without latch-up or thermal runaway.
Thermal design relies on RθJC = 10 °C/W and RθJA = 55 °C/W, supporting continuous operation up to TJ = 150 °C. The device exhibits <1 μA leakage at 73.7 V and temperature coefficient of VBR = 0.106 %/°C - critical for stable clamping across automotive temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000μs) | 600 W - sustains single high-energy transients like ISO 7637-2 Pulse 5a without failure |
| Breakdown Voltage VBR (min/max) | 81.9 V / 100 V @ 1 mA - defines precise turn-on threshold for overvoltage detection |
| Stand-off Voltage VWM | 73.7 V - maximum continuous reverse operating voltage before leakage exceeds 1 μA |
| Clamping Voltage VC @ IPPM | 131 V @ 4.8 A - limits protected circuit voltage during worst-case surge, enabling 15 V margin for 115 V systems |
| Forward Voltage VF | 3.5 V @ 50 A - ensures low conduction loss during forward surge events (e.g., reverse battery connection) |
| Junction-to-Ambient RθJA | 55 °C/W - enables thermal management on standard 1 oz copper PCBs without heatsinking |
| AEC-Q101 Qualified | Yes - validated for automotive under-hood applications per stress test requirements |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, cathode-banded unidirectional configuration. Weight: 0.090 g. Matte tin-plated leads, J-STD-002 solderable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (non-banded end) | Current entry during forward conduction | Connects to lower-potential side (e.g., ground or return path) during surge events |
| Cathode (banded end) | Current entry during reverse clamping | Connects to protected line (e.g., 24 V rail); clamps to anode when VREV > VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive Grade 2 (-40°C to +105°C ambient) reliability and stress testing |
| Glass passivated junction | Ensures stable VBR and low leakage (<1 μA) over 15-year field life in humid environments |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupling) |
| Fast response time | <1.0 ps rise time from 0 V to VBR min - protects nanosecond-scale logic and communication interfaces |
| Moisture sensitivity level 1 | No floor-life limitation or bake requirement prior to reflow - simplifies SMT manufacturing |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 24 V battery-fed control modules exposed to load-dump pulses up to 120 V and ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 24 V rail and chassis ground to clamp transients before they reach PMICs and microcontrollers. Use Value: Clamps 131 V at 4.8 A, providing ≥15 V margin below typical 115 V load-dump peak while surviving 600 W surges. |
Use Scenario: 4–20 mA current-loop sensors in factory automation subject to ESD and cable-induced fast transients. IC Role / Device Role / Timing Role: Bidirectional protection not required; P6SMB91H used in series with loop supply to limit reverse polarity and surge energy. Use Value: 3.5 V forward voltage minimizes insertion loss in 24 V loop; 131 V clamping prevents op-amp input damage during 8 kV contact ESD. |
| LED Driver Overvoltage Clamp | DC-DC Converter Input Protection |
Use Scenario: Constant-current LED drivers powered from 48 V telecom supplies experiencing switching noise and lightning-induced surges. IC Role / Device Role / Timing Role: Placed across driver input terminals to absorb repetitive 10/1000 μs transients exceeding 73.7 V. Use Value: 600 W rating handles multiple surges without degradation; 0.106 %/°C VBR TC ensures stable clamping across -40°C to +125°C ambient. |
Use Scenario: 12 V input to isolated flyback converter in industrial PLCs subjected to inductive kickback from relay coils. IC Role / Device Role / Timing Role: TVS connected from DC input to ground to shunt energy away from primary-side controller IC and MOSFET gate driver. Use Value: 131 V clamping prevents controller latch-up; DO-214AA footprint allows placement near connector with minimal trace inductance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90A | 90 V standoff, 135 V clamping @ 4.4 A, same DO-214AA package | Lower clamping voltage but reduced peak pulse power (600 W same); tighter VBR tolerance (5%) vs. P6SMB91H (±11%) | Select SMBJ90A where tighter voltage tolerance and lower clamping are prioritized over cost and AEC-Q101 validation. |
| 1.5SMC91A | Same VBR range (81.9–100 V), 131 V clamping @ 4.8 A, but DO-214AB (SMC) package (larger footprint) | Higher thermal mass (RθJA = 35 °C/W) supports higher average power; incompatible with SMB land pattern | Choose 1.5SMC91A only if board layout allows larger SMC pad geometry and enhanced thermal dissipation is required. |
Compared with SMBJ90A and 1.5SMC91A, the P6SMB91H uniquely combines AEC-Q101 qualification, DO-214AA compactness, and verified ISO 7637-2 compliance - making it optimal for space-constrained automotive ECUs where qualification and footprint are non-negotiable.
Availability
P6SMB91H is available at Aetrix Electronics and suitable for automotive control units, industrial sensor interfaces, LED driver modules, and DC-DC converter inputs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for P6SMB91H 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, and power devices since 1994.
The P6SMB91H belongs to TSC's AEC-Q101-qualified P6SMBxH series, engineered specifically for automotive-grade transient suppression in 12 V/24 V/48 V systems where reliability under harsh electrical and thermal conditions is mandatory.
FAQ
What is the clamping voltage of the P6SMB91H and how is it measured?
The P6SMB91H has a maximum clamping voltage of 131 V, measured at a peak pulse current (IPPM) of 4.8 A using a standardized 10/1000 μs waveform. This value represents the highest voltage the device allows across its terminals during a transient event, ensuring downstream components remain within safe operating limits. The P6SMB91H achieves this clamping performance while dissipating 600 W of surge energy.
Is the P6SMB91H suitable for bidirectional transient protection?
No, the P6SMB91H is a unidirectional TVS diode intended for DC circuits with defined polarity. For bidirectional protection, TSC offers the P6SMB91AH variant (marked MVJ), which provides symmetrical clamping in both directions. Using the P6SMB91H in AC or bipolar applications risks failure due to forward conduction during negative half-cycles.
Does the P6SMB91H meet automotive qualification standards?
Yes, the P6SMB91H is AEC-Q101 qualified and explicitly tested to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements. Its construction - including glass passivation, moisture sensitivity level 1, and extended temperature range (−55°C to +150°C junction) - validates its suitability for under-hood and body-control module applications.
What is the forward voltage specification for the P6SMB91H and why does it matter?
The P6SMB91H has a forward voltage (VF) of 3.5 V at 50 A, as specified for unidirectional devices in the P6SMB6.8H–P6SMB91H range. This parameter matters during reverse-polarity fault conditions or forward surge events, where low VF minimizes power dissipation and avoids excessive heating in the diode and adjacent traces - critical for sustained fault tolerance in 24 V automotive systems.
Can the P6SMB91H be used in place of the P6SMB91AH?
No - the P6SMB91H and P6SMB91AH are not interchangeable. The P6SMB91H is unidirectional (cathode-banded), while the P6SMB91AH is bidirectional and lacks polarity marking. Substituting one for the other will cause functional failure: the P6SMB91H conducts heavily during negative transients, and the P6SMB91AH provides no defined anode/cathode orientation. Always match suffix 'H' (unidirectional) or 'AH' (bidirectional) to system polarity requirements.
P6SMB91H 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):
- 73.7V
- Voltage - Breakdown (Min):
- 81.9V
- Voltage - Clamping (Max) @ Ipp:
- 131V
- Current - Peak Pulse (10/1000µs):
- 4.8A
- 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)
P6SMB91H FAQ
1.How can I place an order for P6SMB91H through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB91H 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 P6SMB91H reliable?
The price and inventory of P6SMB91H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB91H is usually 5 days.
3.What payment methods are accepted for P6SMB91H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB91H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB91H?
P6SMB91H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB91H 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 P6SMB91H?
For technical support, including P6SMB91H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB91H requirements.
6.How does Aetrix verify that P6SMB91H is sourced from the original manufacturer or authorized distributors?
All P6SMB91H 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 P6SMB91H meets industry standards.
7.What is the process for return or replacement of P6SMB91H?
All P6SMB91H units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB91H, 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 P6SMB91H part is unused and in its original packaging.
Return procedure for P6SMB91H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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