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Vishay General Semiconductor - Diodes Division 1.5SMC9.1CAHE3/57T
- Part No.:
- 1.5SMC9.1CAHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC9.1CAHE3/57T.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:5,694
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Product details
Overview
1.5SMC9.1CAHE3/57T from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy ESD and surge protection. It features 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), 13.4 V clamping voltage (VC) at 112 A peak pulse current (IPPM), and 1500 W peak pulse power (10/1000 µs waveform). It is AEC-Q101 qualified and used to protect automotive sensor signal lines against lightning-induced transients and inductive switching spikes.
For engineers reviewing the 1.5SMC9.1CAHE3/57T datasheet, 1.5SMC9.1CAHE3/57T pinout, 1.5SMC9.1CAHE3/57T application, or 1.5SMC9.1CAHE3/57T equivalent, this page delivers verified electrical parameters, bidirectional TVS functionality, SMC package mechanical data, AEC-Q101 qualification status, and real-world protection use cases in automotive and industrial electronics.
Technical Context
This bidirectional TVS operates symmetrically across both polarities with identical VBR, VWM, and VC specifications in forward and reverse directions. Its glass-passivated junction enables fast response time (<1 ps) and low incremental surge resistance, critical for clamping sub-microsecond transients before downstream IC damage occurs.
The device is rated for 1500 W peak pulse power (10/1000 µs), derated linearly above TA = 25 °C per Fig. 2, and supports continuous power dissipation of 6.5 W on infinite heatsink at 50 °C. Junction temperature range spans −65 °C to +150 °C, and thermal resistance is 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-leads).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 8.65 V / 9.55 V at IT = 1.0 mA - defines precise voltage threshold where avalanche conduction begins in either polarity |
| VWM | 7.78 V - maximum continuous reverse voltage before leakage exceeds 50 µA; ensures no false triggering during normal operation |
| VC @ IPPM | 13.4 V at 112 A - clamped voltage seen by protected circuit during worst-case 1500 W transient, limiting stress on downstream components |
| IPPM | 112 A - peak surge current capability under standardized 10/1000 µs waveform, validated for repetitive 0.01% duty cycle |
| PPPM | 1500 W - peak pulse power handling capacity, enabling robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) |
| TJ max | +150 °C - maximum operating junction temperature, supporting under-hood automotive environments and industrial enclosures |
| Qualification | AEC-Q101 qualified - certified for automotive-grade reliability including temperature cycling, HTRB, and surge endurance testing |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded plastic case meeting UL 94 V-0 flammability rating; matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; MSL level 1 (reflow peak 260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; symmetrical with cathode in bidirectional operation | No polarity marking required - bidirectional conduction means either terminal serves as anode or cathode depending on transient polarity |
| Cathode | Current exit terminal in forward bias; functionally identical to anode for bidirectional devices | Unmarked body - unlike unidirectional variants, 1.5SMC9.1CAHE3/57T has no band or marking; terminals are electrically interchangeable |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional transient suppression | Enables single-device protection of AC-coupled or differential signal lines without polarity concerns - e.g., CAN bus, RS-485, sensor bridges |
| 1500 W peak pulse power (10/1000 µs) | Withstands IEC 61000-4-5 surge test Level 4 (4 kV line-to-ground, 2 Ω source impedance) without degradation |
| AEC-Q101 qualification | Validated for automotive applications including engine control modules, ADAS sensors, and infotainment interfaces requiring zero field failure risk |
| Low clamping ratio (VC/VBR ≈ 1.47) | Minimizes overvoltage exposure to protected ICs - critical for 3.3 V or 5 V logic interfacing with 9.1 V-rated signal paths |
| MSL Level 1, 260 °C reflow compatible | Supports standard lead-free SMT assembly without pre-baking or special handling - reduces manufacturing cost and complexity |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting analog output signals from wheel speed sensors or pressure transducers exposed to load-dump and jump-start transients in 12 V vehicle systems. IC Role / Device Role / Timing Role: Bidirectional TVS placed directly at connector interface to clamp ±100 V transients within nanoseconds before reaching ADC front-end or signal conditioner. Use Value: Prevents latch-up or gate oxide rupture in precision op-amps and SAR ADCs by limiting voltage excursion to ≤13.4 V during 112 A surges. |
Use Scenario: Shielding 24 V DC digital input channels on programmable logic controllers from inductive kickback caused by solenoid de-energization. IC Role / Device Role / Timing Role: Fast-acting shunt element absorbing energy from >100 V spikes induced by relay coil collapse, placed upstream of optocoupler input stage. Use Value: Eliminates need for external RC snubbers while maintaining <10 ns response time - preserves signal integrity for high-speed discrete input sampling. |
| Telecom Line Interface | Consumer Appliance Motor Control |
|
Use Scenario: Safeguarding RS-485 transceivers in building automation networks against lightning-induced common-mode surges on twisted-pair cabling. IC Role / Device Role / Timing Role: Symmetrical protection device across differential pair (A/B lines), referenced to ground via low-inductance layout. Use Value: Maintains signal fidelity up to 10 Mbps by limiting inter-line voltage differential to <13.4 V during 1500 W transients - avoids receiver saturation or false edge detection. |
Use Scenario: Suppressing commutation spikes generated by brushed DC motors in smart home appliances (e.g., vacuum cleaners, washing machines). IC Role / Device Role / Timing Role: Primary surge absorber across motor terminals, diverting energy away from microcontroller GPIOs and H-bridge drivers. Use Value: Extends MCU lifetime by preventing repeated VDD-to-VSS overstress events - validated for >100,000 surge cycles per AEC-Q101 accelerated life testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0CA | Lower PPPM (600 W), same VBR range (8.55–9.45 V), SMB package (smaller footprint, higher RθJA = 85 °C/W) | Limited to lower-energy surges (IEC 61000-4-5 Level 2); unsuitable for under-hood automotive locations with ambient >105 °C | Select when board space is constrained and surge threat level is ≤1 kV; verify thermal margin with PCB copper area |
| 1.5KE9.1CA | Higher VC (14.5 V), same VBR, axial DO-201 package - larger size, manual assembly only, no AEC-Q101 qualification | Not suitable for automated SMT lines or automotive production; lacks MSL 1 rating and automotive reliability validation | Consider only for prototyping or legacy through-hole designs where rework tolerance outweighs production efficiency needs |
Compared with SMBJ9.0CA and 1.5KE9.1CA, the 1.5SMC9.1CAHE3/57T delivers 2.5× higher surge power handling, AEC-Q101 certification for automotive deployment, and SMC package compatibility with high-volume reflow processes - making it the preferred choice for production-grade 12 V system protection where reliability and manufacturability are jointly critical.
Availability
1.5SMC9.1CAHE3/57T is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line drivers, and consumer appliance motor control circuits requiring stable component supply, long-term lifecycle support, and AEC-Q101 compliance.
Supply support for 1.5SMC9.1CAHE3/57T 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 high-reliability, high-power, and automotive-qualified solutions.
The 1.5SMC Series was engineered specifically for surface-mount transient suppression in space-constrained, high-surge environments - targeting automotive, industrial, and telecom applications demanding AEC-Q101 validation and 1500 W pulse robustness.
FAQ
What is the breakdown voltage tolerance of the 1.5SMC9.1CAHE3/57T?
The 1.5SMC9.1CAHE3/57T has a specified breakdown voltage (VBR) range of 8.65 V to 9.55 V at test current IT = 1.0 mA, representing a ±5% tolerance about the nominal 9.1 V rating. This tight distribution ensures consistent clamping behavior across production lots and supports reliable design margining for protected circuits.
Is the 1.5SMC9.1CAHE3/57T suitable for protecting CAN FD interfaces?
Yes, the 1.5SMC9.1CAHE3/57T is well-suited for CAN FD protection due to its bidirectional symmetry, low clamping voltage (13.4 V), and fast response time. Its VWM of 7.78 V allows safe operation with 5 V CAN FD transceivers, while the 1500 W rating handles bus-level surges defined in ISO 16750-2. Layout must minimize trace inductance between device and connector.
Does the 1.5SMC9.1CAHE3/57T require a heatsink for continuous operation?
No, the 1.5SMC9.1CAHE3/57T does not require an external heatsink for its intended transient suppression role. Its 6.5 W steady-state power rating assumes mounting on infinite heatsink at 50 °C; typical applications involve short-duration pulses (<100 ms), so thermal mass of PCB copper pads suffices. Continuous DC power dissipation is not a design use case.
How does the AEC-Q101 qualification of the 1.5SMC9.1CAHE3/57T impact automotive design?
The AEC-Q101 qualification of the 1.5SMC9.1CAHE3/57T certifies it for automotive under-hood and cabin applications, covering stress tests like temperature cycling, high-temperature reverse bias, and surge endurance. This eliminates need for additional qualification testing by Tier 1 suppliers and accelerates PPAP approval for ECUs using the 1.5SMC9.1CAHE3/57T.
What is the maximum allowable PCB pad size for optimal thermal performance of the 1.5SMC9.1CAHE3/57T?
Optimal thermal performance for the 1.5SMC9.1CAHE3/57T is achieved using minimum recommended pad layout: 0.31" × 0.31" (8.0 mm × 8.0 mm) copper areas per terminal, as specified in Fig. 2 of the datasheet. Larger pads improve heat spreading but do not reduce RθJA below the 75 °C/W typical value - further reduction requires internal layer copper pours or thermal vias.
1.5SMC9.1CAHE3/57T 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC9.1CAHE3/57T FAQ
1.How can I place an order for 1.5SMC9.1CAHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC9.1CAHE3/57T 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 1.5SMC9.1CAHE3/57T reliable?
The price and inventory of 1.5SMC9.1CAHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC9.1CAHE3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC9.1CAHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC9.1CAHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC9.1CAHE3/57T?
1.5SMC9.1CAHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC9.1CAHE3/57T 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 1.5SMC9.1CAHE3/57T?
For technical support, including 1.5SMC9.1CAHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC9.1CAHE3/57T requirements.
6.How does Aetrix verify that 1.5SMC9.1CAHE3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC9.1CAHE3/57T 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 1.5SMC9.1CAHE3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC9.1CAHE3/57T?
All 1.5SMC9.1CAHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC9.1CAHE3/57T, 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 1.5SMC9.1CAHE3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC9.1CAHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC9.1CAHE3/57T Tags
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