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Vishay General Semiconductor - Diodes Division 1.5SMC9.1CAHM3/H
- Part No.:
- 1.5SMC9.1CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC9.1CAHM3/H.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,320
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Product details
Overview
1.5SMC9.1CAHM3/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode designed for robust ESD and surge protection in power and signal lines. It features a 9.1 V breakdown voltage (VBR = 8.65–9.55 V at 1.0 mA), 7.78 V stand-off voltage (VWM), clamps to ≤13.4 V at 112 A peak pulse current (IPPM), and delivers 1500 W peak pulse power with 10/1000 μs waveform - deployed in automotive sensor interfaces, industrial I/O protection, and DC power rail conditioning.
For engineers reviewing the 1.5SMC9.1CAHM3/H datasheet, 1.5SMC9.1CAHM3/H pinout, 1.5SMC9.1CAHM3/H application, or 1.5SMC9.1CAHM3/H equivalent, this device serves as a halogen-free, AEC-Q101-qualified TVS for bidirectional overvoltage suppression where low clamping voltage, fast response (<1 ns), and MSL Level 1 reflow compatibility are critical selection criteria.
Technical Context
The 1.5SMC9.1CAHM3/H operates as a symmetrical avalanche diode, conducting equally in both directions above its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5%), low dynamic impedance (<0.1 Ω), and repeatable clamping performance under repetitive 10/1000 μs transients at 0.01% duty cycle.
Designed for surface-mount use in SMC (DO-214AB) package, it supports automated placement and withstands 260 °C lead-free reflow per J-STD-020. With TJ range of –65 °C to +150 °C and RθJA = 75 °C/W, thermal management relies on recommended 8.0 mm × 8.0 mm copper pads per terminal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 8.65 V / 9.55 V at IT = 1.0 mA - defines precise conduction onset for bidirectional surge clamping |
| VWM | 7.78 V - maximum continuous reverse voltage before leakage exceeds 50 μA; sets safe operating margin below VBR |
| VC @ IPPM | ≤13.4 V at 112 A - clamping voltage limits downstream IC stress during 1500 W transient events |
| IPPM | 112 A (10/1000 μs) - peak surge current capacity determines survivability against lightning-induced surges |
| PPPM | 1500 W - peak pulse power rating validates suitability for IEC 61000-4-5 Level 4 (4 kV) surge immunity designs |
| TJ Range | –65 °C to +150 °C - enables deployment in under-hood automotive and industrial environments |
| Package | SMC (DO-214AB) - standardized footprint with 7.75 mm × 6.22 mm body and 2.62 mm height for high-power density PCB layout |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional - no polarity marking; symmetrical terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge input/output node (bidirectional) | Connects to protected line (e.g., CAN_H, RS-485 A/B, DC bus); conducts during positive or negative overvoltage |
| Cathode | Surge input/output node (bidirectional) | Electrically identical to Anode; forms symmetrical clamp path - no cathode band marking on CA devices |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and ADAS sensor interfaces |
| Halogen-free & RoHS-compliant | Meets JEDEC J-STD-20 and JESD201 Class 2 whisker resistance requirements for long-term reliability |
| 1500 W peak pulse power | Supports IEC 61000-4-5 surge testing up to 4 kV (line-to-ground) without degradation |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes voltage overshoot across protected ICs - critical for 3.3 V/5 V logic and analog front-ends |
| MSL Level 1, 260 °C peak | Enables single-pass lead-free reflow without moisture sensitivity concerns or baking requirements |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting ABS wheel speed sensors and oxygen sensor signal lines from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential pair or supply-to-ground to clamp transients before signal conditioning amplifier. Use Value: Clamps 13.4 V max at 112 A ensures downstream op-amps and ADCs remain within absolute maximum ratings during 100 V/50 ms load dump events. |
Use Scenario: Safeguarding RS-485 transceivers in factory automation PLCs exposed to motor switching noise and ground bounce. IC Role / Device Role / Timing Role: Placed line-to-line (A-B) and line-to-ground to suppress common-mode and differential-mode surges per IEC 61000-4-4/5. Use Value: 1500 W rating and 1.4 clamping ratio prevent transceiver latch-up while maintaining signal integrity up to 20 Mbps. |
| DC Power Rail Conditioning | Consumer USB Port ESD Protection |
Use Scenario: Secondary-side overvoltage suppression on 12 V DC outputs of automotive infotainment power supplies. IC Role / Device Role / Timing Role: Mounted between VOUT and GND to absorb inductive kickback from solenoid drivers and relay coils. Use Value: 7.78 V VWM allows full 12 V nominal operation while clamping spikes to ≤13.4 V - preserving regulator headroom and MOSFET gate safety. |
Use Scenario: ESD protection for USB 2.0 D+/D− lines in portable medical monitors and smart home hubs. IC Role / Device Role / Timing Role: Bidirectional clamp across differential data pair to shunt ±15 kV HBM ESD strikes per IEC 61000-4-2. Use Value: Sub-1 ns response and <50 pF junction capacitance avoid signal distortion at 480 Mbps, meeting USB IF compliance. |
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 | Lower peak power (600 W), same VBR range (8.55–9.45 V), SMB package (smaller footprint, higher RθJA) | Limited to lower-energy transients (IEC 61000-4-5 Level 2); unsuitable for 12 V automotive load dump | Select when board space is constrained and surge energy is ≤600 W - verify thermal derating at elevated ambient temperatures. |
| 1.5KE9.1CA | Same electrical specs but axial-leaded DO-201 package; not SMD, no AEC-Q101 qualification | Not suitable for automated assembly or automotive under-hood vibration environments | Use only for prototyping or legacy through-hole designs; requires manual soldering and lacks automotive reliability validation. |
Compared with SMBJ9.0CA and 1.5KE9.1CA, the 1.5SMC9.1CAHM3/H uniquely combines AEC-Q101 qualification, 1500 W surge capability, halogen-free construction, and SMC package - making it the only option among the three validated for production automotive electronics requiring zero rework risk and full IEC 61000-4-5 Level 4 compliance.
Availability
1.5SMC9.1CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial communication ports, and DC power rail protection requiring stable component supply, long-term lifecycle support, and AEC-Q101 traceability.
Supply support for 1.5SMC9.1CAHM3/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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The 1.5SMC Series was engineered specifically for high-power, surface-mount transient suppression in harsh environments - emphasizing AEC-Q101 qualification, low clamping voltage, and robust surge handling in compact SMC packaging.
FAQ
What does the 'HM3' suffix indicate in 1.5SMC9.1CAHM3/H?
The 'HM3' suffix in 1.5SMC9.1CAHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. The 'H' indicates 7-inch tape-and-reel packaging (850 units per reel), and the '/H' ending confirms this specific reel configuration. This suffix ensures compliance with automotive environmental and reliability standards.
Is 1.5SMC9.1CAHM3/H unidirectional or bidirectional?
1.5SMC9.1CAHM3/H is a bidirectional TVS diode, as confirmed by the 'CA' suffix in its part number. It provides symmetrical clamping for both positive and negative transients, with identical VBR, VWM, and VC specifications in either direction - ideal for protecting AC-coupled or differential signal lines.
What is the maximum clamping voltage of 1.5SMC9.1CAHM3/H at rated peak pulse current?
The maximum clamping voltage (VC) of 1.5SMC9.1CAHM3/H is 13.4 V at its rated peak pulse current (IPPM) of 112 A, measured using the standard 10/1000 μs double-exponential waveform. This value is guaranteed across the full operating temperature range and ensures predictable overvoltage limiting for protected circuitry.
Does 1.5SMC9.1CAHM3/H require a heatsink for standard operation?
No, 1.5SMC9.1CAHM3/H does not require an external heatsink for transient suppression duty cycles. Its thermal design assumes mounting on 8.0 mm × 8.0 mm copper pads per terminal, providing sufficient heat dissipation for 1500 W short-duration pulses. Continuous power dissipation is limited to 6.5 W at 50 °C ambient.
How does the 1.5SMC9.1CAHM3/H compare to standard 1.5SMC9.1A in terms of automotive qualification?
Unlike the commercial-grade 1.5SMC9.1A, the 1.5SMC9.1CAHM3/H is fully AEC-Q101 qualified and halogen-free. It undergoes additional stress testing including temperature cycling, high-temperature operating life, and unbiased highly accelerated stress testing - making it approved for automotive powertrain and chassis applications where reliability is mission-critical.
1.5SMC9.1CAHM3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC, 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):
- 112A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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-214AB (SMC)
1.5SMC9.1CAHM3/H FAQ
1.How can I place an order for 1.5SMC9.1CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC9.1CAHM3/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 1.5SMC9.1CAHM3/H reliable?
The price and inventory of 1.5SMC9.1CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC9.1CAHM3/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC9.1CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC9.1CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC9.1CAHM3/H?
1.5SMC9.1CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC9.1CAHM3/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 1.5SMC9.1CAHM3/H?
For technical support, including 1.5SMC9.1CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC9.1CAHM3/H requirements.
6.How does Aetrix verify that 1.5SMC9.1CAHM3/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC9.1CAHM3/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 1.5SMC9.1CAHM3/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC9.1CAHM3/H?
All 1.5SMC9.1CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC9.1CAHM3/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 1.5SMC9.1CAHM3/H part is unused and in its original packaging.
Return procedure for 1.5SMC9.1CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC9.1CAHM3/H Tags
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