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Vishay General Semiconductor - Diodes Division P4SMA91AHE3_A/H
- Part No.:
- P4SMA91AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA91AHE3_A/H.pdf
- Description:
- TVS DIODE 77.8VWM 125VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,622
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Product details
Overview
P4SMA91AHE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, 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 3.2 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - suitable for protecting automotive-grade sensor interfaces and industrial power rails.
For engineers reviewing the P4SMA91AHE3_A/H datasheet, P4SMA91AHE3_A/H pinout, P4SMA91AHE3_A/H application, or P4SMA91AHE3_A/H equivalent, this device delivers AEC-Q101 qualification, low incremental surge resistance, fast response time, and MSL Level 1 moisture sensitivity - critical for high-reliability automotive electronics, industrial control inputs, and telecom line protection where transient immunity and long-term stability are mandatory.
Technical Context
The P4SMA91AHE3_A/H operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its breakdown threshold to divert surge energy away from downstream circuitry. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1.0 µA at VWM), while thermal resistance RθJA = 120 °C/W supports operation up to TJ = +150 °C under defined PCB pad layout.
It is rated for 400 W peak pulse power (10/1000 µs) at 25 °C, derating linearly above TA = 25 °C per Figure 2, and handles 40 A non-repetitive forward surge current (8.3 ms half-sine). The cathode band identifies polarity, and matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 86.5 V / 95.5 V at IT = 1.0 mA - defines precise clamping onset window for reliable overvoltage detection |
| VWM | 77.8 V - maximum continuous reverse operating voltage before leakage rises significantly |
| VC @ IPPM | 125 V at 3.2 A - clamped voltage during 400 W transient, limiting stress on protected ICs |
| PPPM | 400 W (10/1000 µs) - surge energy handling capacity for common lightning/inductive-switching threats |
| IFSM | 40 A (8.3 ms half-sine) - robustness against single-event power-line surges |
| TJ max. | +150 °C - enables use in under-hood automotive and high-ambient industrial environments |
| AEC-Q101 | Qualified - validated for automotive electronic modules requiring zero-failure reliability over lifetime |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads; cathode identified by black band; meets UL 94 V-0 flammability rating and J-STD-020 MSL Level 1 (peak reflow 260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to ground or lower-potential rail in unidirectional TVS configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line; conducts avalanche current when VLINE > VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and ADAS sensor interfaces |
| Glass passivated junction | Ensures stable VBR over temperature and lifetime, minimizing parameter drift in harsh environments |
| 400 W peak pulse power | Handles IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 12 V systems without degradation |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes voltage overshoot during transients, reducing risk of latch-up in protected CMOS ICs |
| MSL Level 1 rating | Enables standard SMT reflow without baking, simplifying manufacturing for high-volume automotive production |
Applications
| Automotive Sensor Protection | Industrial Power Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and chassis ground to clamp transients before they reach sensitive input pins. Use Value: Maintains signal integrity during 12 V system load dump (up to 35 V for 400 ms) and prevents damage to AEC-Q100 qualified interface ICs. |
Use Scenario: Safeguarding 24 V DC power inputs of PLC I/O modules and motor drives against inductive switching spikes and lightning-induced surges. IC Role / Device Role / Timing Role: Primary front-end TVS on main supply rail, coordinated with upstream fuse and downstream LC filtering. Use Value: Limits transient voltage to ≤125 V during 400 W events, preventing MOSFET gate oxide failure and controller reset. |
| Telecom Line Interface Protection | Consumer Power Adapter ESD/Surge Guard |
Use Scenario: Shielding Ethernet PHY power pins and auxiliary bias rails in PoE-powered switches and base stations from induced surges on long cable runs. IC Role / Device Role / Timing Role: Standoff-rated TVS on isolated DC-DC bias supplies, absorbing coupled energy from adjacent data lines. Use Value: Withstands repeated 10/1000 µs surges up to 400 W while maintaining <1 µA leakage at 77.8 V, preserving standby efficiency. |
Use Scenario: Secondary-side overvoltage suppression in USB-C PD adapters and AC/DC wall adapters exposed to mains transients and user-handling ESD. IC Role / Device Role / Timing Role: Final-stage clamping device on regulated 5–20 V output rails, placed after secondary-side rectification. Use Value: Fast response (<1 ns) and low VC prevent downstream USB controller latch-up during 8 kV contact ESD events per IEC 61000-4-2. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ90A-E3/5A | 90 V VBR (85.5–94.5 V), same SMA package, 400 W rating, but commercial-grade (non-AEC-Q101) | Lacks automotive qualification; suitable for industrial/commercial designs without automotive lifecycle requirements | Select when AEC-Q101 is not mandated and cost optimization is prioritized |
| 1.5SMC91A | Same VBR range (86.5–95.5 V), higher 1500 W rating, but larger SMC (DO-214AB) package and 2.5× footprint | Requires PCB redesign; used where higher surge margin is needed beyond 400 W | Choose only if system-level surge testing exceeds IEC 61000-4-5 Level 4 and layout allows larger footprint |
Compared with SMAJ90A-E3/5A, P4SMA91AHE3_A/H provides AEC-Q101 validation and tighter VBR tolerance for automotive use; versus 1.5SMC91A, it offers identical clamping performance in a 40% smaller SMA footprint - enabling compact, high-density layouts without sacrificing surge capability.
Availability
P4SMA91AHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC power inputs, and telecom line interface protection requiring stable component supply across extended production lifecycles.
Supply support for P4SMA91AHE3_A/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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The P4SMA Series is engineered for robust transient suppression in space-constrained, high-temperature environments - targeting automotive electronics, industrial controls, and telecom infrastructure where AEC-Q101 compliance and stable clamping performance are essential.
FAQ
What is the breakdown voltage tolerance of P4SMA91AHE3_A/H?
The P4SMA91AHE3_A/H has a breakdown voltage VBR specified from 86.5 V to 95.5 V at test current IT = 1.0 mA, representing a ±5% tolerance around the nominal 91 V rating. This tight tolerance ensures predictable clamping behavior across production lots and temperature ranges, critical for consistent protection in automotive and industrial systems where overvoltage margins are tightly constrained. The P4SMA91AHE3_A/H maintains this specification under AEC-Q101 stress conditions.
Is P4SMA91AHE3_A/H suitable for bidirectional transient protection?
No, P4SMA91AHE3_A/H is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. It conducts only in reverse bias above VBR and blocks forward current like a standard diode. For bidirectional protection, Vishay offers the P4SMA91CA variant (with "CA" suffix), which lacks polarity marking and clamps symmetrically in both directions. Using P4SMA91AHE3_A/H in bidirectional applications risks forward conduction and failure.
What does the "HE3_A/H" suffix mean in P4SMA91AHE3_A/H?
The "HE3" denotes RoHS-compliant and AEC-Q101 qualified construction; "A" indicates revision level A per Vishay's internal documentation; "H" specifies packaging in 7-inch plastic tape-and-reel format with 1800 units per reel. This full suffix confirms the P4SMA91AHE3_A/H meets automotive reliability standards, environmental compliance, and automated assembly requirements - distinguishing it from commercial-grade variants like P4SMA91AE3.
How does P4SMA91AHE3_A/H perform under elevated ambient temperatures?
P4SMA91AHE3_A/H derates linearly above TA = 25 °C per Figure 2 in the datasheet: peak pulse power drops to ~300 W at 85 °C ambient and ~200 W at 125 °C. Its RθJA = 120 °C/W assumes minimum recommended copper pad layout (0.2" × 0.2"). At TJ = +150 °C maximum, the device sustains full 400 W rating only at TA ≤ 25 °C; system design must account for thermal coupling to ensure junction temperature remains within limit during surge events. The P4SMA91AHE3_A/H is validated for this behavior under AEC-Q101 thermal cycling.
Can P4SMA91AHE3_A/H replace older P4SMA91A parts in existing designs?
Yes, P4SMA91AHE3_A/H is a direct replacement for legacy P4SMA91A parts with identical electrical characteristics, SMA (DO-214AC) package dimensions, and pinout - provided the design requires AEC-Q101 qualification and RoHS compliance. The "HE3" suffix adds automotive qualification and updated material content; no PCB or schematic changes are needed. However, verify that the original design's thermal and surge requirements align with the P4SMA91AHE3_A/H's 400 W rating and 125 V clamping voltage, as these values remain unchanged from prior revisions.
P4SMA91AHE3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- P4SMA, TransZorb®
- 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):
- 3.2A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA91AHE3_A/H FAQ
1.How can I place an order for P4SMA91AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA91AHE3_A/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 P4SMA91AHE3_A/H reliable?
The price and inventory of P4SMA91AHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA91AHE3_A/H is usually 5 days.
3.What payment methods are accepted for P4SMA91AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA91AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA91AHE3_A/H?
P4SMA91AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA91AHE3_A/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 P4SMA91AHE3_A/H?
For technical support, including P4SMA91AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA91AHE3_A/H requirements.
6.How does Aetrix verify that P4SMA91AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All P4SMA91AHE3_A/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 P4SMA91AHE3_A/H meets industry standards.
7.What is the process for return or replacement of P4SMA91AHE3_A/H?
All P4SMA91AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA91AHE3_A/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 P4SMA91AHE3_A/H part is unused and in its original packaging.
Return procedure for P4SMA91AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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