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Vishay General Semiconductor - Diodes Division 1.5SMC9.1CAHM3/I
- Part No.:
- 1.5SMC9.1CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC9.1CAHM3/I.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,758
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Product details
Overview
1.5SMC9.1CAHM3/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 9.1 V breakdown voltage (VBR = 8.65–9.55 V at IT = 1.0 mA), 7.78 V stand-off voltage (VWM), 13.4 V maximum clamping voltage (VC) at 12.0 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5SMC9.1CAHM3/I datasheet, 1.5SMC9.1CAHM3/I pinout, 1.5SMC9.1CAHM3/I application, or 1.5SMC9.1CAHM3/I equivalent, this device serves as a halogen-free, AEC-Q101-qualified, surface-mount TVS for bidirectional surge suppression where low clamping voltage, fast response (<1 ns), and MSL Level 1 reliability are critical.
Technical Context
The 1.5SMC9.1CAHM3/I is a glass-passivated, bidirectional SMC-packaged TVS diode optimized for clamping transients induced by inductive switching and lightning surges. Its symmetrical breakdown behavior ensures identical protection in both polarities, with a temperature coefficient of VBR at +0.068 %/°C and junction-to-lead thermal resistance of 15 °C/W.
It operates across –65 °C to +150 °C junction temperature range, supports repetitive 0.01 % duty cycle pulses, and meets UL 94 V-0 flammability requirements. The device exhibits low incremental surge resistance and excellent clamping ratio (VC/VBR ≈ 1.47), enabling effective energy diversion without overstressing downstream ICs or MOSFETs.
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; sets safe operating margin below clamping onset |
| VC @ IPPM | 13.4 V at 12.0 A - peak clamped voltage during 10/1000 µs surge; determines maximum stress on protected circuitry |
| PPPM | 1500 W - peak pulse power handling capability; enables survival of high-energy transients per industry-standard waveform |
| IPPM | 12.0 A - maximum non-repetitive peak pulse current; directly correlates with surge immunity level in real-world ESD/lightning events |
| TJmax | +150 °C - maximum junction temperature; supports operation in under-hood automotive and high-ambient industrial environments |
| Package | SMC (DO-214AB) - standardized surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal design for reliable power dissipation |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional configuration with no polarity marking; molded compound meets UL 94 V-0; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional terminal pair | No functional polarity - either terminal serves as anode or cathode depending on instantaneous voltage polarity; enables single-device protection of AC or floating DC lines |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control, ADAS sensor, and infotainment power rails |
| Halogen-free & RoHS-compliant | Meets IEC 61249-2-21 and JEDEC J-STD-020 MSL Level 1 - supports green manufacturing and reflow compatibility up to 260 °C peak |
| 1500 W peak pulse power | Withstands 10/1000 µs transients per ISO 7637-2 and IEC 61000-4-5 Level 4 - eliminates need for cascaded protection stages in cost-sensitive designs |
| Low clamping voltage (13.4 V) | Clamps 9.1 V-rated line within 47 % above VBR, minimizing overvoltage exposure to 3.3 V/5 V logic and CAN transceivers |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term leakage stability - critical for battery-powered and always-on systems requiring <1 μA standby leakage |
Applications
| Automotive Sensor Interface | Industrial PLC Digital Input |
|---|---|
|
Use Scenario: Protecting LIN/CAN bus nodes and analog sensor outputs (e.g., pressure, temperature) from load dump and alternator ripple in 12 V vehicle systems. IC Role / Device Role: Bidirectional clamping element placed between signal line and ground, absorbing ±100 V transients without forward conduction. Use Value: Prevents latch-up or gate oxide damage in microcontrollers and signal conditioners while maintaining signal integrity below 7.78 V normal operation. |
Use Scenario: Shielding 24 V DC digital input modules in programmable logic controllers against field-wiring surges and relay coil flyback. IC Role / Device Role: Primary overvoltage clamp on input terminals, coordinated with series impedance to limit let-through energy to <10 mJ. Use Value: Enables >100,000 actuation cycles without degradation, verified per IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) test standards. |
| Telecom Power Supply Rail | Consumer USB Port Protection |
|
Use Scenario: Safeguarding secondary-side 5–12 V DC outputs of telecom AC/DC adapters against lightning-induced common-mode surges on output cables. IC Role / Device Role: Low-capacitance (CJ < 200 pF typical) bidirectional shunt clamp across output rail and chassis ground. Use Value: Limits output overshoot to ≤13.4 V during 1 kV/500 A surge, preserving compliance with GR-1089-CORE and EN 61000-6-2 immunity requirements. |
Use Scenario: Adding secondary-level surge protection on VBUS and D+/D− lines of USB 2.0 ports in smart home hubs and set-top boxes. IC Role / Device Role: Standoff-rated (7.78 V) TVS placed after primary fuse and series impedance to avoid false triggering during hot-plug events. Use Value: Clamps ESD strikes (±15 kV contact) and cable discharge events to <15 V, preventing damage to USB PHYs while passing USB-IF electrical compliance tests. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0CA | Lower PPPM (600 W), smaller SMB package (DO-214AA), higher VC (15.4 V @ 6.5 A) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a load dump simulation | Select when board space is constrained and surge threat level is limited to IEC 61000-4-2/4-4 only |
| 1.5KE9.1CA | Through-hole TO-204AE (DO-41) package, same VBR/VC, but slower thermal response and no AEC-Q101 qualification | Not suitable for automated SMT assembly or automotive under-hood environments due to leaded construction and derating limitations | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with SMBJ9.0CA and 1.5KE9.1CA, the 1.5SMC9.1CAHM3/I delivers superior surge robustness (1500 W vs. 600 W/1500 W), automotive qualification, and SMT manufacturability - making it the preferred choice for production-grade automotive and industrial electronics requiring validated reliability and high-power transient handling.
Availability
1.5SMC9.1CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC inputs, telecom power rail hardening, and consumer USB port surge suppression requiring stable component supply, full traceability, and lifecycle continuity.
Supply support for 1.5SMC9.1CAHM3/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 performance.
The 1.5SMC9.1CAHM3/I belongs to Vishay's TRANSZORB® SMC-series TVS family, engineered specifically for high-power, surface-mount transient suppression in automotive, industrial, and communications infrastructure where AEC-Q101 compliance and repeatable clamping performance are mandatory.
FAQ
What is the breakdown voltage tolerance of the 1.5SMC9.1CAHM3/I?
The 1.5SMC9.1CAHM3/I has a specified breakdown voltage range of 8.65 V to 9.55 V at test current IT = 1.0 mA, representing a ±5.5 % tolerance about the nominal 9.1 V rating. This tight VBR distribution ensures consistent clamping onset across production lots and supports reliable coordination with downstream overvoltage detectors or regulators in the 1.5SMC9.1CAHM3/I-protected system.
Is the 1.5SMC9.1CAHM3/I suitable for automotive applications?
Yes, the 1.5SMC9.1CAHM3/I carries the HM3 suffix indicating halogen-free, RoHS-compliant, and AEC-Q101 qualification - verified for temperature cycling, highly accelerated life testing (HALT), and ESD robustness per automotive requirements. It is explicitly rated for under-hood and body-control module use, and its 1500 W surge capability meets ISO 7637-2 Pulse 5a load dump specifications when mounted per recommended 8.0 mm × 8.0 mm copper pads.
How does the clamping voltage of the 1.5SMC9.1CAHM3/I compare to its breakdown voltage?
The 1.5SMC9.1CAHM3/I clamps to 13.4 V at its rated 12.0 A peak pulse current (10/1000 µs), yielding a clamping ratio (VC/VBR) of approximately 1.47 using the nominal 9.1 V breakdown. This low ratio reflects efficient energy absorption and minimal let-through voltage - critical for protecting 5 V and 3.3 V ICs downstream, as confirmed in Vishay's published clamping curves for the 1.5SMC9.1CAHM3/I.
What is the thermal resistance of the 1.5SMC9.1CAHM3/I, and how does it affect PCB layout?
The 1.5SMC9.1CAHM3/I has a typical junction-to-lead thermal resistance (RθJL) of 15 °C/W and junction-to-ambient (RθJA) of 75 °C/W when mounted on minimum recommended 8.0 mm × 8.0 mm copper pads. To maintain TJ ≤ 150 °C during repetitive surges, PCB layout must provide adequate copper area and minimize trace length - the 1.5SMC9.1CAHM3/I datasheet specifies these pad dimensions as essential for achieving rated PPPM.
Does the 1.5SMC9.1CAHM3/I have polarity markings, and how is it installed?
No - the 1.5SMC9.1CAHM3/I is a bidirectional TVS and carries no cathode band or polarity marking. It is symmetrically constructed so that either end functions identically regardless of applied voltage polarity. Installation requires no orientation check; the device may be placed in-line between any two nodes needing mutual transient suppression, such as signal line to ground or differential pair legs in the 1.5SMC9.1CAHM3/I application.
1.5SMC9.1CAHM3/I 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/I FAQ
1.How can I place an order for 1.5SMC9.1CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC9.1CAHM3/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 1.5SMC9.1CAHM3/I reliable?
The price and inventory of 1.5SMC9.1CAHM3/I 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/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC9.1CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC9.1CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC9.1CAHM3/I?
1.5SMC9.1CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC9.1CAHM3/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 1.5SMC9.1CAHM3/I?
For technical support, including 1.5SMC9.1CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC9.1CAHM3/I requirements.
6.How does Aetrix verify that 1.5SMC9.1CAHM3/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC9.1CAHM3/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 1.5SMC9.1CAHM3/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC9.1CAHM3/I?
All 1.5SMC9.1CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC9.1CAHM3/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 1.5SMC9.1CAHM3/I part is unused and in its original packaging.
Return procedure for 1.5SMC9.1CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC9.1CAHM3/I Tags
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