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Vishay General Semiconductor - Diodes Division 1.5SMC9.1CAHE3_A/H
- Part No.:
- 1.5SMC9.1CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC9.1CAHE3_A/H.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:5,419
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Product details
Overview
1.5SMC9.1CAHE3_A/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of signal and power 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 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 1.5SMC9.1CAHE3_A/H datasheet, 1.5SMC9.1CAHE3_A/H pinout, 1.5SMC9.1CAHE3_A/H application, or 1.5SMC9.1CAHE3_A/H equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification, low clamping ratio (VC/VWM ≈ 1.72), thermal resistance (RθJA = 75 °C/W), and compatibility with automated SMT placement on standard 8.0 mm × 8.0 mm copper pads.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical clamping performance regardless of transient polarity - critical for AC-coupled or floating signal lines. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<100 μA at VWM), while the 10/1000 μs surge rating reflects real-world lightning and inductive-switching transients.
The device is rated for continuous power dissipation of 6.5 W at TA = 50 °C and supports junction temperatures from –65 °C to +150 °C. Its MSL Level 1 rating (reflow peak 260 °C) and matte tin-plated leads comply with J-STD-002/JESD 22-B102 solderability standards - enabling high-yield reflow assembly without derating concerns.
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 direction |
| VWM | 7.78 V - maximum continuous reverse voltage before significant leakage; sets safe operating margin below VBR |
| VC @ IPPM | 13.4 V at 12.0 A - clamped voltage during 10/1000 μs surge; determines protected circuit's maximum stress level |
| PPPM | 1500 W - peak surge power handling capability under standardized lightning impulse waveform |
| IPPM | 12.0 A - maximum non-repetitive surge current the device safely clamps without degradation |
| RθJA | 75 °C/W - thermal resistance from junction to ambient; informs board-level thermal design for sustained power dissipation |
| TJ range | –65 °C to +150 °C - enables operation in under-hood automotive, industrial control, and outdoor telecom environments |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads; dimensions 7.75 mm × 6.22 mm × 2.62 mm (L × W × H); meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; common node for bidirectional conduction path | No polarity marking - symmetrical terminals enable identical clamping behavior in both directions |
| Cathode | Current exit terminal in forward bias; electrically equivalent to Anode in bidirectional configuration | Unmarked body - bidirectional devices lack cathode band; terminals are interchangeable in PCB layout |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity testing, and mechanical shock per JESD22 standards |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV) surges when properly mounted on 8.0 mm × 8.0 mm copper pads |
| Low clamping ratio (VC/VWM = 1.72) | Minimizes voltage overshoot during transients - protects downstream 5 V or 3.3 V logic without overdesigning margin |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free reflow without moisture sensitivity concerns or baking requirements |
| Glass-passivated junction | Ensures long-term stability of VBR and leakage current across temperature and lifetime stress conditions |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting CAN, LIN, or analog sensor lines (e.g., pressure, temperature) from load-dump and ESD events in engine control units. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point to shunt transients before reaching MCU or signal conditioner. Use Value: Prevents latch-up or permanent damage to 5 V tolerant receivers by limiting line voltage to ≤13.4 V during 12.0 A surges. |
Use Scenario: Safeguarding PLC digital input modules against field-wiring induced surges from relay coils or motor drives. IC Role / Device Role / Timing Role: Primary front-end TVS on 24 V DC input channels, coordinated with series impedance and filtering. Use Value: Maintains functional integrity under repeated 1 kV/500 A fast-rising transients per IEC 61000-4-4, reducing field failure rates. |
| Telecom Line Card Surge Suppression | Consumer USB/Display Port ESD Guard |
Use Scenario: Secondary protection on Ethernet PHY or xDSL line drivers exposed to lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Coordinated clamping stage following gas discharge tube (GDT) primary protection to limit let-through voltage. Use Value: Achieves <10 ns response time and clamps residual surge to 13.4 V - within safe operating area of 12 V rail-tolerant transceivers. |
Use Scenario: Board-level ESD protection for USB 2.0 data lines and HDMI hot-plug detection pins in set-top boxes and monitors. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF typical) bidirectional clamp placed adjacent to connector to minimize signal distortion. Use Value: Passes IEC 61000-4-2 ±15 kV contact discharge without degradation while preserving signal integrity up to 480 Mbps. |
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), same VBR range (8.55–9.45 V), SMB package (smaller footprint, higher RθJA = 90 °C/W) | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 compliance without parallel staging | Select when board space is constrained and surge energy is ≤600 W; verify thermal margin at 6.5 W dissipation. |
| 1.5KE9.1CA | Same VBR/VC, but axial DO-201 package; higher mounting inductance, no SMT compatibility, RθJA ≈ 50 °C/W on PCB | Requires through-hole assembly; incompatible with automated SMT lines and high-density layouts | Choose only for legacy through-hole designs or prototyping where rework flexibility outweighs production efficiency. |
Compared with SMBJ9.0CA and 1.5KE9.1CA, the 1.5SMC9.1CAHE3_A/H delivers 2.5× higher surge power in an AEC-Q101-qualified SMT package with superior thermal performance and automated placement support - making it the preferred choice for volume automotive and industrial applications requiring validated reliability and process scalability.
Availability
1.5SMC9.1CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O hardening, and telecom line-card surge suppression requiring stable component supply, AEC-Q101 traceability, and RoHS-compliant manufacturing.
Supply support for 1.5SMC9.1CAHE3_A/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, TVS devices, and optoelectronics with emphasis on reliability, power handling, and automotive qualification.
The 1.5SMC Series was engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where AEC-Q101 compliance, 1500 W surge capability, and SMT manufacturability are mandatory.
FAQ
What does the "CA" suffix indicate in 1.5SMC9.1CAHE3_A/H?
The "CA" suffix in 1.5SMC9.1CAHE3_A/H denotes a bidirectional configuration - meaning the device provides symmetrical transient voltage suppression in both polarities, with identical VBR, VC, and IPPM characteristics regardless of voltage polarity. This eliminates the need for polarity-aware placement and simplifies protection of AC-coupled or floating lines. The 1.5SMC9.1CAHE3_A/H achieves this via back-to-back diode construction inside a single SMC package.
Is 1.5SMC9.1CAHE3_A/H AEC-Q101 qualified, and what does that cover?
Yes, 1.5SMC9.1CAHE3_A/H is AEC-Q101 qualified - verified per the full stress test suite including temperature cycling, high-temperature operating life, unbiased highly accelerated stress test (uHAST), and mechanical shock. This qualification confirms suitability for automotive powertrain, chassis, and body electronics where reliability under thermal, vibration, and electrical stress is mission-critical. The HE3 suffix explicitly denotes AEC-Q101 compliance in the ordering code.
What is the clamping voltage of 1.5SMC9.1CAHE3_A/H, and how is it measured?
The clamping voltage (VC) of 1.5SMC9.1CAHE3_A/H is 13.4 V, measured at a peak pulse current (IPPM) of 12.0 A using the standardized 10/1000 μs double-exponential waveform per IEC 61000-4-5. This value represents the maximum voltage imposed on the protected circuit during worst-case surge events and is guaranteed across the full operating temperature range (–65 °C to +150 °C). It is not a typical value but a maximum specification.
Can 1.5SMC9.1CAHE3_A/H replace unidirectional TVS diodes like 1.5SMC9.1AHE3_A/H?
No - 1.5SMC9.1CAHE3_A/H is strictly bidirectional and cannot functionally replace unidirectional variants such as 1.5SMC9.1AHE3_A/H. Unidirectional types conduct only in reverse bias and block forward current, whereas the CA version conducts equally in both directions. Substituting them risks unintended forward conduction in DC-biased circuits and invalidates clamping behavior assumptions. Always match suffix (A vs. CA) to system polarity requirements.
What PCB layout guidance applies to 1.5SMC9.1CAHE3_A/H for optimal surge performance?
For optimal surge performance, mount 1.5SMC9.1CAHE3_A/H with minimum trace length between the device and protected line, using 8.0 mm × 8.0 mm copper pads per terminal as specified in the Vishay datasheet. Avoid vias or narrow traces in the current path; ensure solid ground plane connection beneath the device. Thermal relief should be minimized to maintain low RθJA. This layout sustains the rated 1500 W peak pulse power and prevents localized overheating during repetitive transients.
1.5SMC9.1CAHE3_A/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:
- Active
- 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_A/H FAQ
1.How can I place an order for 1.5SMC9.1CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC9.1CAHE3_A/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 1.5SMC9.1CAHE3_A/H reliable?
The price and inventory of 1.5SMC9.1CAHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC9.1CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC9.1CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC9.1CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC9.1CAHE3_A/H?
1.5SMC9.1CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC9.1CAHE3_A/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 1.5SMC9.1CAHE3_A/H?
For technical support, including 1.5SMC9.1CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC9.1CAHE3_A/H requirements.
6.How does Aetrix verify that 1.5SMC9.1CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC9.1CAHE3_A/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 1.5SMC9.1CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC9.1CAHE3_A/H?
All 1.5SMC9.1CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC9.1CAHE3_A/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 1.5SMC9.1CAHE3_A/H part is unused and in its original packaging.
Return procedure for 1.5SMC9.1CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC9.1CAHE3_A/H Tags
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Diodes Incorporated
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