My Inquiry
My Account
Vishay General Semiconductor - Diodes Division P4SMA91CAHM3_A/I
- Part No.:
- P4SMA91CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA91CAHM3_A/I.pdf
- Description:
- TVS DIODE 77.8VWM 125VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,452
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P4SMA91CAHM3_A/I 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 91 V breakdown voltage (VBR min/max = 86.5 V / 95.5 V 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 lines.
For engineers reviewing the P4SMA91CAHM3_A/I datasheet, P4SMA91CAHM3_A/I pinout, P4SMA91CAHM3_A/I application, or P4SMA91CAHM3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, MSL Level 1 moisture sensitivity, halogen-free RoHS compliance, and thermal resistance (RθJA = 120 °C/W) under standard PCB pad layout.
Technical Context
The P4SMA91CAHM3_A/I operates as a bidirectional avalanche diode, symmetrically clamping transient overvoltages in both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 µA at 77.8 V stand-off voltage), while its low incremental surge resistance enables fast response to ESD and lightning-induced surges.
Rated for repetitive 10/1000 µs pulses at 0.01% duty cycle (400 W up to 91 V, derated to 300 W above), it sustains operation across -65 °C to +150 °C junction temperature range and meets UL 94 V-0 flammability requirements in its SMA molding compound.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 86.5 V / 95.5 V at IT = 1 mA - defines reliable avalanche initiation threshold for bidirectional clamping |
| VWM | 77.8 V - maximum continuous reverse working voltage before significant leakage begins |
| VC @ IPPM | 125 V at 3.2 A - clamped voltage during 10/1000 µs transient, limiting stress on downstream ICs |
| PPPM | 400 W - peak pulse power handling per 10/1000 µs waveform, enabling robust surge immunity |
| IPPM | 3.2 A - maximum non-repetitive peak pulse current supported under standard mounting conditions |
| RθJA | 120 °C/W - thermal resistance from junction to ambient, requiring minimum 0.2" × 0.2" copper pads for rated power |
| TJ max | +150 °C - maximum junction temperature, supporting operation in under-hood automotive environments |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional - no polarity marking; symmetrical two-terminal construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional terminal pair | Either terminal serves as anode or cathode depending on transient polarity; no marking required |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Halogen-free & RoHS-compliant | Meets JEDEC J-STD-020 MSL Level 1 and JESD201 Class 2 whisker resistance |
| Glass-passivated junction | Ensures stable VBR tolerance and low leakage drift over time and temperature |
| Low-profile SMA package | Enables automated SMT placement and fits high-density PCB layouts with minimal Z-height |
| UL 94 V-0 molding compound | Provides flame-retardant encapsulation required for safety-critical industrial and automotive systems |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN, LIN, or analog sensor signal lines (e.g., pressure, temperature) from load dump and ISO 7637-2 transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS clamping device placed at connector interface to shunt surge energy before reaching signal conditioning circuitry. Use Value: Limits transient voltage to ≤125 V during 3.2 A surges, preserving integrity of 3.3 V/5 V microcontrollers and ADC front-ends. |
Use Scenario: Safeguarding digital input/output channels on programmable logic controllers against inductive switching spikes from solenoids and relays. IC Role / Device Role / Timing Role: Standoff protection element mounted directly at field-wire entry point to clamp fast-rising transients before isolation barriers. Use Value: Withstands 400 W 10/1000 µs pulses without degradation, ensuring long-term reliability in factory automation environments. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Secondary-side transient suppression on Ethernet PHY or RS-485 bus lines exposed to ESD and induced surges in network equipment. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp minimizing signal distortion while meeting IEC 61000-4-2/4-5 immunity requirements. Use Value: Clamps to 125 V within nanoseconds, preventing latch-up or damage to transceivers operating at 2.5 V–3.3 V logic levels. |
Use Scenario: Input-stage surge protection on AC-DC adapter primary-side rectifier outputs or DC bus rails feeding SMPS controllers. IC Role / Device Role / Timing Role: Secondary-level transient suppressor absorbing residual spikes after MOV-based primary protection. Use Value: Provides precise 77.8 V standoff and 125 V clamping to protect 100 V-rated MOSFETs and gate drivers in compact adapters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ91CA | Higher 600 W PPPM, larger SMB (DO-214AA) package, RθJA = 85 °C/W | Better suited for higher-energy surges where board space allows larger footprint | Select when >400 W pulse handling is required and PCB layout accommodates 4.6 mm × 3.9 mm body |
| 1.5KE91CA | Through-hole TO-218 package, 1500 W PPPM, higher VC = 142 V at 10.3 A | Used in legacy power supply designs with through-hole assembly and higher surge margin needs | Choose for cost-sensitive industrial power supplies where SMT is not mandatory and higher clamping voltage is acceptable |
Compared with SMBJ91CA and 1.5KE91CA, the P4SMA91CAHM3_A/I delivers AEC-Q101 qualification, halogen-free compliance, and optimized thermal performance in the smallest surface-mount form factor - making it the preferred choice for space-constrained, automotive-grade, and high-reliability SMT designs.
Availability
P4SMA91CAHM3_A/I 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_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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA Series was developed to deliver high-power, low-profile transient suppression for automotive, industrial, and communications systems - combining AEC-Q101 qualification, halogen-free materials, and standardized SMA packaging for broad design reuse.
FAQ
What is the clamping voltage of P4SMA91CAHM3_A/I under a 10/1000 µs surge?
The P4SMA91CAHM3_A/I clamps to a maximum of 125 V at 3.2 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured with the device mounted on 0.2" × 0.2" copper pads per JEDEC standards and reflects worst-case voltage seen by protected circuitry during transient events.
Is P4SMA91CAHM3_A/I suitable for automotive applications?
Yes, P4SMA91CAHM3_A/I is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant, and automotive-grade construction. It is explicitly rated for operation from -65 °C to +150 °C and validated for mechanical shock, temperature cycling, and HTRB - making it appropriate for engine control, body electronics, and ADAS sensor protection.
What does the "CA" suffix mean in P4SMA91CAHM3_A/I?
The "CA" suffix in P4SMA91CAHM3_A/I denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression in both forward and reverse directions. Unlike unidirectional variants (e.g., P4SMA91A), it has no cathode band marking and functions identically regardless of voltage polarity applied across its terminals.
How does the HM3 suffix differ from E3 or M3 in the P4SMA91CAHM3_A/I part number?
The HM3 suffix indicates halogen-free, RoHS-compliant, and AEC-Q101 qualified construction, whereas E3 is RoHS-compliant commercial grade and M3 is halogen-free RoHS-compliant commercial grade. Only HM3 and HE3 variants meet automotive qualification - confirmed by Vishay's ordering matrix and datasheet revision notes.
What is the maximum steady-state power dissipation for P4SMA91CAHM3_A/I?
The P4SMA91CAHM3_A/I has a maximum steady-state power dissipation (PD) of 3.3 W at TA = 50 °C on an infinite heatsink. In typical PCB applications with standard 0.2" × 0.2" copper pads, derating applies per Figure 2 of the datasheet, reducing usable power at elevated ambient temperatures.
P4SMA91CAHM3_A/I 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:
- -
- 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_A/I FAQ
1.How can I place an order for P4SMA91CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA91CAHM3_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 P4SMA91CAHM3_A/I reliable?
The price and inventory of P4SMA91CAHM3_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 P4SMA91CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for P4SMA91CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA91CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA91CAHM3_A/I?
P4SMA91CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA91CAHM3_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 P4SMA91CAHM3_A/I?
For technical support, including P4SMA91CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA91CAHM3_A/I requirements.
6.How does Aetrix verify that P4SMA91CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All P4SMA91CAHM3_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 P4SMA91CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of P4SMA91CAHM3_A/I?
All P4SMA91CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA91CAHM3_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 P4SMA91CAHM3_A/I part is unused and in its original packaging.
Return procedure for P4SMA91CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA91CAHM3_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 …
