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Vishay General Semiconductor - Diodes Division P4SMA91CAHM3/H
- Part No.:
- P4SMA91CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA91CAHM3/H.pdf
- Description:
- TVS DIODE 77.8VWM 125VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,928
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Product details
Overview
P4SMA91CAHM3/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal and power lines. It features a 77.8 V stand-off voltage (VWM), 86.5–95.5 V breakdown voltage (VBR) at 1 mA, 125 V maximum clamping voltage (VC) at 3.2 A peak pulse current (IPPM), and 400 W peak pulse power rating with 10/1000 µs waveform - suitable for protecting automotive sensor interfaces and industrial I/O circuits.
For engineers reviewing the P4SMA91CAHM3/H datasheet, P4SMA91CAHM3/H pinout, P4SMA91CAHM3/H application, or P4SMA91CAHM3/H equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 120 °C/W), bidirectional polarity behavior, and halogen-free RoHS-compliant construction per JESD201 Class 2 whisker test.
Technical Context
The P4SMA91CAHM3/H operates as a bidirectional avalanche diode, symmetrically clamping transient overvoltages in both polarities without polarity marking. Its glass-passivated junction enables fast response time (<1 ns) and low incremental surge resistance, critical for suppressing ESD and inductive switching spikes.
Rated for 400 W peak pulse power (derated to 300 W above 91 V), it sustains repetitive surges at 0.01% duty cycle when mounted on 5.0 mm × 5.0 mm copper pads. Junction temperature range spans –65 °C to +150 °C, and it meets MSL Level 1 per J-STD-020 with 260 °C reflow peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 77.8 V - Maximum continuous reverse voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (Breakdown) | 86.5–95.5 V at 1 mA - Confirmed avalanche onset range; ensures predictable clamping threshold under transient stress. |
| VC (Clamping) | 125 V at 3.2 A IPPM - Peak voltage seen by protected circuit during 10/1000 µs surge; determines downstream component stress. |
| PPPM | 400 W (≤91 V), 300 W (>91 V) - Surge energy handling capacity with standard 10/1000 µs waveform; defines transient robustness. |
| RθJA | 120 °C/W - Thermal resistance junction-to-ambient; informs derating requirements for sustained power dissipation. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
| Package | SMA (DO-214AC) - Surface-mount outline with 5.0 mm × 5.0 mm pad layout; supports automated placement and IPC-compliant reflow. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads solderable per J-STD-002 and JESD22-B102; no polarity marking for bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias | One of two symmetrical terminals; identical function in either direction due to bidirectional design. |
| Cathode | Current exit terminal in forward bias | Second symmetrical terminal; no band marking distinguishes polarity in bidirectional configuration. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints. |
| 400 W peak pulse power | Handles high-energy transients from inductive load switching or lightning-induced surges in industrial environments. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control modules and ADAS sensor interfaces. |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for global electronics manufacturing and end-of-life recycling. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking; simplifies SMT production logistics. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD events in 12 V vehicle systems. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed across differential signal pair or supply rail to limit transient voltage excursions. Use Value: Prevents latch-up or permanent damage to sensitive analog front-ends while maintaining signal integrity under ISO 7637-2 Pulse 5a stress. |
Use Scenario: Safeguarding digital input/output channels of programmable logic controllers against field-wiring induced surges and ground bounce. IC Role / Device Role / Timing Role: Standoff-connected TVS on each I/O line to shunt surge current away from microcontroller GPIO or optocoupler inputs. Use Value: Enables reliable operation in factory automation where 4–20 mA loops and relay coils generate repetitive 10/1000 µs transients up to 400 W. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Shielding Ethernet PHY interface pins and telephone line drivers from lightning-induced surges in outdoor telecom equipment. IC Role / Device Role / Timing Role: Bidirectional TVS placed between line pair and ground to suppress common-mode transients without affecting DC bias. Use Value: Maintains signal fidelity at 100 Mbps while meeting ITU-T K.21 basic protection level for public network interfaces. |
Use Scenario: Clamping input rectifier output in AC/DC adapters to protect downstream switching controllers from mains-borne transients. IC Role / Device Role / Timing Role: Parallel-connected TVS across bulk capacitor to clamp overvoltage spikes during brownout recovery or surge events. Use Value: Extends controller lifetime by limiting peak voltage to 125 V during 6 kV combination wave tests per IEC 61000-4-5. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90CA | Higher 90 V VWM, 100 V VC at 4.3 A; SMB package (larger footprint, lower RθJA = 80 °C/W) | Better thermal performance for higher-duty-cycle surges; requires PCB area increase | Select when sustained surge repetition or tighter clamping margin is required and board space permits SMB footprint. |
| 1.5SMC91CA | Same VWM/VC specs but in larger SMC (DO-214AB) package; 1500 W PPPM rating | Higher energy absorption for infrequent but extreme transients (e.g., lightning); not AEC-Q101 qualified | Choose for non-automotive industrial systems needing >400 W surge headroom without AEC validation. |
Compared with SMBJ90CA and 1.5SMC91CA, the P4SMA91CAHM3/H offers optimal balance of AEC-Q101 qualification, halogen-free compliance, and compact SMA footprint - making it preferred for space-constrained automotive and consumer designs where 400 W surge capability suffices.
Availability
P4SMA91CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, telecom line interfaces, and consumer power adapter designs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for P4SMA91CAHM3/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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific optimization.
The P4SMA Series targets cost-sensitive, high-volume transient protection needs across automotive, industrial, and communications markets - engineered for automated assembly, AEC-Q101 compliance, and consistent clamping performance in harsh environments.
FAQ
What does the 'CA' suffix indicate in P4SMA91CAHM3/H?
The 'CA' suffix in P4SMA91CAHM3/H denotes a bidirectional configuration, meaning the device provides symmetrical transient voltage clamping in both polarities. Unlike unidirectional variants (e.g., P4SMA91AHM3/H), it has no cathode band marking and is used where AC signals, floating lines, or polarity-agnostic protection is required - confirmed in Vishay's P4SMA datasheet revision 09-Jan-2024, section "DEVICES FOR BIDIRECTION APPLICATIONS".
Is P4SMA91CAHM3/H qualified for automotive applications?
Yes, P4SMA91CAHM3/H is AEC-Q101 qualified, as indicated by the 'HM3' suffix (halogen-free, RoHS-compliant, and AEC-Q101 qualified). This certification covers stress tests including temperature cycling, high-temperature reverse bias, and ESD, validating its use in automotive subsystems such as body control modules and sensor interfaces per Vishay's ordering information table and mechanical data section.
What is the maximum clamping voltage of P4SMA91CAHM3/H under surge conditions?
The maximum clamping voltage (VC) of P4SMA91CAHM3/H is 125 V at 3.2 A peak pulse current (IPPM) with a 10/1000 µs waveform, per the Electrical Characteristics table on page 2 of the Vishay P4SMA datasheet (Doc. #88367). This value defines the upper voltage limit imposed on protected circuitry during standardized surge events.
How does the HM3 suffix differ from E3 or M3 in P4SMA91CAHM3/H?
The HM3 suffix in P4SMA91CAHM3/H specifies halogen-free, RoHS-compliant construction with AEC-Q101 qualification - distinct from E3 (RoHS-compliant commercial grade) and M3 (halogen-free RoHS-compliant commercial grade). Only HM3 and HE3 variants carry automotive qualification, confirmed in the "MECHANICAL DATA" section of the Vishay P4SMA datasheet.
What PCB pad layout is recommended for optimal thermal performance of P4SMA91CAHM3/H?
Vishay specifies a 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad layout for each terminal of P4SMA91CAHM3/H to achieve rated 400 W peak pulse power, as stated in the "MAXIMUM RATINGS" footnote (2) and Fig. 1. Deviating from this pad size reduces surge capability and increases junction temperature - critical for maintaining reliability in high-repetition transient environments.
P4SMA91CAHM3/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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA91CAHM3/H FAQ
1.How can I place an order for P4SMA91CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA91CAHM3/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 P4SMA91CAHM3/H reliable?
The price and inventory of P4SMA91CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA91CAHM3/H is usually 5 days.
3.What payment methods are accepted for P4SMA91CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA91CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA91CAHM3/H?
P4SMA91CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA91CAHM3/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 P4SMA91CAHM3/H?
For technical support, including P4SMA91CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA91CAHM3/H requirements.
6.How does Aetrix verify that P4SMA91CAHM3/H is sourced from the original manufacturer or authorized distributors?
All P4SMA91CAHM3/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 P4SMA91CAHM3/H meets industry standards.
7.What is the process for return or replacement of P4SMA91CAHM3/H?
All P4SMA91CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA91CAHM3/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 P4SMA91CAHM3/H part is unused and in its original packaging.
Return procedure for P4SMA91CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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