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Vishay General Semiconductor - Diodes Division P4SMA11CAHM3/H
- Part No.:
- P4SMA11CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA11CAHM3/H.pdf
- Description:
- TVS DIODE 9.4VWM 15.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,346
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Product details
Overview
P4SMA11CAHM3/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 11 V breakdown voltage (VBR min/max = 10.5–11.6 V at 1 mA), 9.4 V standoff voltage (VWM), 15.6 V maximum clamping voltage (VC) at 25.6 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, sensor interfaces, and communication lines in automotive and industrial control systems.
For engineers reviewing the P4SMA11CAHM3/H datasheet, P4SMA11CAHM3/H pinout, P4SMA11CAHM3/H application, or P4SMA11CAHM3/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, low incremental surge resistance, and compatibility with automated SMT placement on PCBs requiring transient immunity per IEC 61000-4-2/4-4/4-5.
Technical Context
This device operates as a voltage-clamping protector: when reverse (or either polarity for bidirectional types) voltage exceeds VBR, it avalanches into low-impedance conduction to shunt surge current away from downstream circuitry. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), while the SMA package supports thermal dissipation up to 3.3 W continuous power at 50 °C ambient.
The P4SMA11CAHM3/H is rated for -65 °C to +150 °C operating junction temperature, meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), and exhibits a temperature coefficient of VBR of +0.075 %/°C - enabling predictable clamping behavior across automotive temperature ranges without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 10.5 V / 11.6 V at 1 mA test current - defines precise avalanche initiation threshold for reliable overvoltage triggering |
| VWM | 9.4 V - maximum continuous working voltage before leakage exceeds 5 μA; sets safe operating margin below clamping onset |
| VC @ IPPM | 15.6 V at 25.6 A (10/1000 µs) - clamping voltage during worst-case surge; determines protected IC's voltage stress limit |
| PPPM | 400 W peak pulse power - sustains high-energy transients (e.g., ISO 7637-2 pulse 1/2a/5a) without failure |
| IFSM | Not applicable - bidirectional device has no forward surge rating; unidirectional variants only specify 40 A (8.3 ms half-sine) |
| TJ max | +150 °C - enables operation in under-hood automotive environments and sealed industrial enclosures |
| Package | SMA (DO-214AC) - 5.28 mm × 4.50 mm footprint with matte tin-plated leads; compatible with standard SMT reflow profiles |
Pinout & Package
SMA (DO-214AC) package: surface-mount, molded plastic case with two terminals; no polarity marking for bidirectional devices - symmetrical construction allows orientation-agnostic placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional terminal pair | Either terminal serves as anode or cathode depending on transient polarity; no DC bias dependency |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JEDEC standards |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and IPC-1752A material declarations; suitable for green manufacturing |
| 400 W peak pulse power (10/1000 µs) | Clamps high-energy surges such as load dump transients in 12 V vehicle systems without degradation |
| Low clamping ratio (VC/VBR ≈ 1.41) | Minimizes voltage overshoot during clamping - critical for protecting 3.3 V or 5 V logic interfaces |
| MSL Level 1 moisture sensitivity | Zero bake requirement before SMT assembly; supports direct placement from dry pack after opening |
Applications
| Automotive Sensor Interface Protection | Industrial CAN Bus Line Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, or position sensors in engine control units exposed to load dump and inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional TVS clamping transient spikes on differential or single-ended sensor outputs before they reach ADC inputs or signal conditioners. Use Value: Prevents sensor signal corruption and microcontroller reset events caused by >100 V transients, maintaining ASIL-B functional safety integrity. |
Use Scenario: Shielding CAN_H and CAN_L lines in vehicle body control modules against ESD (±15 kV contact) and burst noise per ISO 11898-2. IC Role / Device Role / Timing Role: Low-capacitance (≈100 pF at 0 V) bidirectional clamp placed directly at connector entry point to divert fast transients before transceiver input stage. Use Value: Maintains CAN signal integrity up to 1 Mbps with <1 ns response, avoiding bit errors or bus-off conditions during EMC testing. |
| Consumer Power Adapter Input Stage | Telecom DSL Line Surge Protection |
Use Scenario: Safeguarding primary-side controller ICs and optocouplers in AC-DC adapters subjected to lightning-induced surges on mains input. IC Role / Device Role / Timing Role: Front-end TVS absorbing line-to-line and line-to-ground surges before bridge rectifier and PWM controller. Use Value: Withstands 400 W pulses without parametric shift, eliminating need for redundant MOVs and reducing BOM count. |
Use Scenario: Protecting ADSL/VDSL line interface ICs from induced surges on twisted-pair copper loops in outdoor telecom cabinets. IC Role / Device Role / Timing Role: Bidirectional clamp on each line (tip/ring) referenced to ground, coordinated with gas discharge tube (GDT) for staged protection. Use Value: Clamps residual voltage to ≤16 V after GDT fires, preventing damage to sensitive line drivers rated for 18 V absolute maximum. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ11CA | 600 W PPPM, larger SMB (DO-214AA) package (5.3 mm × 4.1 mm), higher VC = 18.2 V at 32.9 A | Higher power handling but 20 % larger PCB area; better for 24 V systems with stronger surges | Select when system-level surge tests exceed 400 W or board layout allows larger footprint |
| 1.5KE11CA | 1500 W PPPM, axial leaded DO-201AE package, VC = 18.2 V at 82.5 A, not SMT-compatible | Requires through-hole assembly and manual soldering; unsuitable for high-density or automated production | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with SMBJ11CA and 1.5KE11CA, the P4SMA11CAHM3/H offers optimal balance of compact SMT footprint, AEC-Q101 qualification, and sufficient 400 W surge capacity for cost-sensitive automotive and industrial signal-line protection - without sacrificing reflow compatibility or halogen-free compliance.
Availability
P4SMA11CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial CAN networks, consumer power adapters, and telecom DSL line cards requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for P4SMA11CAHM3/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, efficiency, and application-specific performance.
The P4SMA Series is engineered for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where AEC-Q101 qualification, low clamping voltage, and automated manufacturability are mandatory.
FAQ
What does the "HM3" suffix indicate in P4SMA11CAHM3/H?
The "HM3" suffix in P4SMA11CAHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. The "H" indicates 7-inch tape-and-reel packaging (1800 units per reel), and "M3" confirms compliance with JEDEC J-STD-020 MSL Level 1 and JESD 201 Class 2 whisker resistance. This makes P4SMA11CAHM3/H suitable for automotive-grade production where material content and reliability are strictly controlled.
Is P4SMA11CAHM3/H unidirectional or bidirectional?
P4SMA11CAHM3/H is a bidirectional TVS diode, as confirmed by the "CA" suffix in its part number. It provides symmetrical clamping for voltage transients of either polarity - essential for protecting AC-coupled lines like CAN, RS-485, or audio interfaces. Unlike unidirectional variants (e.g., P4SMA11A), P4SMA11CAHM3/H has no cathode band marking and exhibits identical VBR, VWM, and VC characteristics in both directions.
What is the maximum clamping voltage of P4SMA11CAHM3/H under surge conditions?
The maximum clamping voltage (VC) of P4SMA11CAHM3/H is 15.6 V at 25.6 A peak pulse current with a 10/1000 µs waveform, per Vishay's datasheet revision 09-Jan-2024. This value represents the upper voltage limit imposed on protected circuitry during worst-case transient events - critical for ensuring downstream ICs (e.g., 3.3 V or 5 V logic) remain within absolute maximum ratings.
Does P4SMA11CAHM3/H require derating above 25 °C ambient temperature?
Yes, P4SMA11CAHM3/H requires thermal derating above 25 °C ambient. Its power dissipation (PD) drops linearly from 3.3 W at 50 °C case temperature, and peak pulse power (PPPM) decreases per Figure 2 in the datasheet - e.g., at TJ = 125 °C, PPPM is reduced to ~60 % of 400 W. Designers must apply junction-to-ambient thermal resistance (RθJA = 120 °C/W) and pad layout data to ensure safe operation in elevated ambient environments.
Can P4SMA11CAHM3/H be used in place of P4SMA11A in a design?
No - P4SMA11CAHM3/H is bidirectional while P4SMA11A is unidirectional, so direct substitution is not recommended without circuit review. Unidirectional P4SMA11A conducts only in reverse bias and blocks forward current, whereas P4SMA11CAHM3/H clamps in both directions. Using P4SMA11CAHM3/H in a DC-biased line may cause unintended conduction; verify polarity requirements and transient directionality before replacement.
P4SMA11CAHM3/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):
- 9.4V
- Voltage - Breakdown (Min):
- 10.5V
- Voltage - Clamping (Max) @ Ipp:
- 15.6V
- Current - Peak Pulse (10/1000µs):
- 25.6A
- 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)
P4SMA11CAHM3/H FAQ
1.How can I place an order for P4SMA11CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA11CAHM3/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 P4SMA11CAHM3/H reliable?
The price and inventory of P4SMA11CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA11CAHM3/H is usually 5 days.
3.What payment methods are accepted for P4SMA11CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA11CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA11CAHM3/H?
P4SMA11CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA11CAHM3/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 P4SMA11CAHM3/H?
For technical support, including P4SMA11CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA11CAHM3/H requirements.
6.How does Aetrix verify that P4SMA11CAHM3/H is sourced from the original manufacturer or authorized distributors?
All P4SMA11CAHM3/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 P4SMA11CAHM3/H meets industry standards.
7.What is the process for return or replacement of P4SMA11CAHM3/H?
All P4SMA11CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA11CAHM3/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 P4SMA11CAHM3/H part is unused and in its original packaging.
Return procedure for P4SMA11CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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