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Vishay General Semiconductor - Diodes Division P4SMA9.1CAHM3/H
- Part No.:
- P4SMA9.1CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA9.1CAHM3/H.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,230
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Product details
Overview
P4SMA9.1CAHM3/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 9.1 V breakdown voltage (VBR min/max = 8.65–9.55 V at IT = 1.0 mA), 7.78 V stand-off voltage (VWM), and clamps to ≤13.4 V at 29.9 A peak pulse current (IPPM) under 10/1000 µs waveform - used in automotive sensor interface protection per AEC-Q101 qualification.
For engineers reviewing the P4SMA9.1CAHM3/H datasheet, P4SMA9.1CAHM3/H pinout, P4SMA9.1CAHM3/H application, or P4SMA9.1CAHM3/H equivalent, key selection criteria include bidirectional clamping capability, 400 W peak pulse power rating, low clamping ratio (VC/VBR ≈ 1.47), MSL Level 1 reflow compatibility, and halogen-free RoHS-compliant construction with AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This device operates as a voltage-clamped surge protector with symmetrical avalanche behavior in both directions due to its bidirectional structure. It exhibits 0.068 %/°C temperature coefficient of VBR, 120 °C/W junction-to-ambient thermal resistance, and 30 °C/W junction-to-lead thermal resistance - enabling stable transient suppression across -65 °C to +150 °C operating range.
The P4SMA9.1CAHM3/H delivers 400 W peak pulse power (10/1000 µs) with ≤13.4 V clamping voltage at 29.9 A, while maintaining ≤50 µA maximum reverse leakage at VWM. Its glass-passivated chip junction and matte tin-plated leads meet J-STD-002/JESD 22-B102 solderability standards and JESD 201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 8.65 V / 9.55 V at IT = 1.0 mA - defines precise avalanche initiation threshold for bidirectional clamping |
| VWM | 7.78 V - maximum continuous working voltage before leakage exceeds 50 µA; sets safe operating margin below VBR |
| VC @ IPPM | ≤13.4 V at 29.9 A (10/1000 µs) - actual clamped voltage seen by protected circuit during surge event |
| PPPM | 400 W - peak transient energy absorption capacity without failure under standardized surge waveform |
| IPPM | 29.9 A - maximum non-repetitive surge current the device can safely divert |
| TJ max. | +150 °C - maximum junction temperature allowing reliable operation in under-hood automotive environments |
| AEC-Q101 | Qualified - validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case meeting UL 94 V-0 flammability rating. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H); cathode band absent (bidirectional type).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; common terminal in bidirectional configuration | Symmetrical terminal - no polarity marking; connects to either side of protected line |
| Cathode | Current exit point in forward bias; common terminal in bidirectional configuration | Symmetrical terminal - no polarity marking; connects to either side of protected line |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables symmetric transient suppression on AC-coupled or floating signal lines without polarity concerns |
| 400 W peak pulse power | Supports robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) in compact SMA footprint |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control modules, ADAS sensors, and infotainment interfaces |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for global automotive and industrial supply chains |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without preconditioning or dry-pack requirements |
Applications
| Automotive Sensor Interface | Industrial CAN Bus Protection |
|---|---|
|
Use Scenario: Protecting LIN/CAN transceiver inputs and analog sensor outputs (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential pair or single-ended signal line to clamp transients before they reach sensitive IC inputs. Use Value: Clamps 29.9 A surge to ≤13.4 V, preserving signal integrity and preventing latch-up in 3.3 V/5 V automotive microcontrollers. |
Use Scenario: Safeguarding CAN FD physical layer transceivers in factory automation controllers exposed to motor switching noise and ground bounce. IC Role / Device Role / Timing Role: Low-capacitance TVS mounted directly at connector entry point to shunt fast-rising transients (<1 ns rise time) away from PHY. Use Value: 0.068 %/°C VBR tempco ensures stable clamping across wide ambient ranges (-40 °C to +125 °C), critical for deterministic bus timing. |
| Consumer USB Port Protection | Telecom DSL Line Interface |
|
Use Scenario: Secondary-level surge protection on USB 2.0 data lines (D+/D−) in set-top boxes and smart home hubs subjected to human-body ESD events. IC Role / Device Role / Timing Role: Bidirectional suppressor placed after common-mode choke to absorb differential-mode ESD pulses without distorting 480 Mbps signaling. Use Value: 13.4 V clamping voltage stays well below USB PHY absolute maximum ratings (typically 20 V), avoiding damage while maintaining eye diagram integrity. |
Use Scenario: Primary overvoltage protection on twisted-pair DSL subscriber line interfaces exposed to lightning-induced surges on outside plant wiring. IC Role / Device Role / Timing Role: High-energy TVS connected between tip/ring and ground to limit longitudinal surges before reaching line driver/receiver ICs. Use Value: 400 W peak power rating handles repeated 10/1000 µs surges up to 1 kV, extending service life of DSLAM front-end components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0CA | Higher 600 W PPPM, larger SMB (DO-214AA) package, VC = 14.4 V @ 33.5 A | Better suited for higher-energy surges but requires larger PCB area and has slower response due to higher junction capacitance | Select when surge energy exceeds 400 W or when legacy SMB layout exists |
| 1.5KE9.1CA | Through-hole TO-204AE (DO-201AE), 1500 W PPPM, VC = 14.5 V @ 103 A | Designed for primary-level AC/DC input protection; incompatible with SMT assembly and high-density layouts | Choose only for prototyping or low-volume through-hole designs where board space is unconstrained |
Compared with SMBJ9.0CA and 1.5KE9.1CA, the P4SMA9.1CAHM3/H offers optimal balance of automotive qualification, compact SMA footprint, and precise 9.1 V clamping - making it ideal for space-constrained, high-reliability signal-line protection where AEC-Q101 compliance and MSL Level 1 process compatibility are mandatory.
Availability
P4SMA9.1CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, consumer USB port protection, and telecom DSL line interfaces requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for P4SMA9.1CAHM3/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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA Series targets cost-sensitive, high-volume transient protection needs in automotive, industrial, and communications systems - delivering AEC-Q101-qualified TVS performance in the industry-standard SMA package.
FAQ
What is the breakdown voltage tolerance for P4SMA9.1CAHM3/H?
The P4SMA9.1CAHM3/H has a specified breakdown voltage range of 8.65 V to 9.55 V at test current IT = 1.0 mA, representing ±5.5 % tolerance around the nominal 9.1 V rating. This tight VBR window ensures consistent clamping behavior across production lots and supports reliable design margining in automotive and industrial applications where precise voltage thresholds are critical.
Is P4SMA9.1CAHM3/H suitable for automotive applications?
Yes, the P4SMA9.1CAHM3/H is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant, and automotive-grade construction. It is specifically validated for use in engine control units, body electronics, ADAS sensors, and infotainment systems - meeting stringent requirements for temperature cycling, humidity testing, and surge immunity required by automotive OEMs.
What does the "CA" suffix mean in P4SMA9.1CAHM3/H?
The "CA" suffix in P4SMA9.1CAHM3/H denotes a bidirectional Transient Voltage Suppressor configuration. Unlike unidirectional variants (e.g., P4SMA9.1A), the CA version provides symmetrical clamping in both polarities - essential for protecting AC-coupled signals, differential buses like CAN or RS-485, and floating sensor outputs without concern for polarity orientation during placement.
What is the maximum clamping voltage of P4SMA9.1CAHM3/H under surge conditions?
The P4SMA9.1CAHM3/H clamps to a maximum of 13.4 V at its rated peak pulse current of 29.9 A under the standardized 10/1000 µs waveform. This clamping voltage is measured across the device terminals during surge conduction and represents the upper voltage limit imposed on the protected circuit - ensuring downstream 5 V or 3.3 V ICs remain within safe operating limits during transient events.
Does P4SMA9.1CAHM3/H require special handling during PCB assembly?
No, the P4SMA9.1CAHM3/H meets MSL Level 1 per J-STD-020 and is rated for a maximum lead-free reflow peak temperature of 260 °C. It can be processed using standard SMT reflow profiles without baking, dry packing, or special storage - simplifying manufacturing logistics and reducing risk of moisture-related defects in high-volume production of automotive and industrial PCBs.
P4SMA9.1CAHM3/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):
- 7.78V
- Voltage - Breakdown (Min):
- 8.65V
- Voltage - Clamping (Max) @ Ipp:
- 13.4V
- Current - Peak Pulse (10/1000µs):
- 29.9A
- 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)
P4SMA9.1CAHM3/H FAQ
1.How can I place an order for P4SMA9.1CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA9.1CAHM3/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 P4SMA9.1CAHM3/H reliable?
The price and inventory of P4SMA9.1CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA9.1CAHM3/H is usually 5 days.
3.What payment methods are accepted for P4SMA9.1CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA9.1CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA9.1CAHM3/H?
P4SMA9.1CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA9.1CAHM3/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 P4SMA9.1CAHM3/H?
For technical support, including P4SMA9.1CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA9.1CAHM3/H requirements.
6.How does Aetrix verify that P4SMA9.1CAHM3/H is sourced from the original manufacturer or authorized distributors?
All P4SMA9.1CAHM3/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 P4SMA9.1CAHM3/H meets industry standards.
7.What is the process for return or replacement of P4SMA9.1CAHM3/H?
All P4SMA9.1CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA9.1CAHM3/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 P4SMA9.1CAHM3/H part is unused and in its original packaging.
Return procedure for P4SMA9.1CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA9.1CAHM3/H Tags
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