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Vishay General Semiconductor - Diodes Division 1.5SMC91CAHE3_A/H
- Part No.:
- 1.5SMC91CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC91CAHE3_A/H.pdf
- Description:
- TVS DIODE 77.8VWM 125VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:5,824
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Product details
Overview
1.5SMC91CAHE3_A/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMC (DO-214AB) package, rated for 1500 W peak pulse power with 10/1000 μs waveform, 91 V breakdown voltage (VBR min/max = 86.5 V / 95.5 V), and clamping voltage of 125 V at 12.0 A peak pulse current - deployed for ESD and surge protection on automotive sensor signal lines, industrial I/O ports, and telecom interface circuits.
For engineers reviewing the 1.5SMC91CAHE3_A/H datasheet, 1.5SMC91CAHE3_A/H pinout, 1.5SMC91CAHE3_A/H application, or 1.5SMC91CAHE3_A/H equivalent, this device delivers AEC-Q101 qualification, low incremental surge resistance, fast response time, and bidirectional clamping capability essential for robust transient immunity in safety-critical 12 V/24 V systems.
Technical Context
The 1.5SMC91CAHE3_A/H implements a glass-passivated silicon junction optimized for bidirectional transient suppression, with symmetrical clamping behavior in both polarities and no polarity marking on the case. Its thermal design supports operation up to +150 °C junction temperature and features RθJA = 75 °C/W on standard 8.0 mm × 8.0 mm copper pads.
It meets J-STD-020 MSL Level 1 (peak reflow ≤ 260 °C), uses matte tin-plated leads compliant with JESD 22-B102, and is qualified per AEC-Q101 for automotive under-hood and chassis applications - distinguishing it from commercial-grade variants like 1.5SMC91CA-E3.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 86.5 V / 95.5 V at 1.0 mA test current - defines precise voltage threshold where avalanche conduction begins in either direction |
| VWM | 77.8 V - maximum continuous reverse stand-off voltage before leakage exceeds 1.0 μA; sets safe operating margin below clamping |
| VC @ IPPM | 125 V at 12.0 A - clamped voltage during full 1500 W surge, limiting downstream IC stress to sub-125 V levels |
| PPPM | 1500 W - peak pulse power handling with 10/1000 μs waveform, enabling protection against lightning-induced surges per IEC 61000-4-5 |
| IPPM | 12.0 A - peak pulse current corresponding to 1500 W at 125 V clamp, validated with repetitive 0.01 % duty cycle |
| TJ max | +150 °C - maximum junction temperature rating, supporting under-hood automotive deployment without derating at 85 °C ambient |
| AEC-Q101 | Qualified - certified for automotive use including temperature cycling, HTRB, and surge endurance per AEC stress test plan |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional configuration with no polarity marking; molded compound meets UL 94 V-0; terminals are matte tin-plated for solderability per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (negative polarity) | Accepts reverse surge current during negative transients; forms one half of symmetrical clamping path |
| Cathode | Transient current entry point (positive polarity) | Accepts reverse surge current during positive transients; forms complementary half of bidirectional clamping path |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV/2 Ω) surges on 12 V bus interfaces without failure |
| AEC-Q101 qualification | Validates reliability for automotive powertrain, body control, and ADAS sensor modules over 15-year service life |
| Low clamping ratio (VC/VBR ≈ 1.30) | Minimizes overvoltage stress on protected ICs compared to higher-ratio TVS devices |
| MSL Level 1 moisture sensitivity | Allows direct placement into high-volume SMT lines without baking or special handling |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Port |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and inductive switching transients in 12 V/24 V vehicle systems. IC Role / Device Role / Timing Role: Bidirectional TVS placed directly at connector entry point to shunt surge energy before reaching signal conditioning circuitry. Use Value: Clamps transients to ≤125 V while maintaining <1 μA leakage at 77.8 V, preserving signal integrity and preventing latch-up in downstream op-amps and ADCs. |
Use Scenario: Safeguarding digital input/output channels of programmable logic controllers against field-wiring induced surges in factory automation environments. IC Role / Device Role / Timing Role: Primary surge arrestor on isolated 24 V DC I/O lines, coordinated with upstream fusing and filtering. Use Value: Delivers 1500 W pulse handling with <1 ns response time, ensuring microcontroller GPIOs remain undamaged during 4 kV contact discharge events. |
| Telecom Line Interface | Consumer Power Adapter EMI Filter |
Use Scenario: Shielding RS-485/RS-422 differential data lines in base station backhaul equipment from lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Paired bidirectional TVS across differential pair, referenced to local ground plane. Use Value: Symmetrical VBR tolerance (±5 %) ensures balanced clamping, minimizing skew and maintaining signal eye diagram integrity at 10 Mbps. |
Use Scenario: Secondary-side transient suppression on 5 V/12 V USB-C PD output rails in wall adapters subjected to user-handling ESD. IC Role / Device Role / Timing Role: Final-stage TVS after DC-DC converter, absorbing residual fast transients escaping primary-side filtering. Use Value: 125 V clamping voltage limits overshoot on connected devices, while AEC-Q101 qualification assures long-term stability in thermally cycled enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90CA | Lower peak power (600 W), same VBR range (85.5–94.5 V), SMB package (smaller footprint, higher RθJA) | Limited to lower-energy surges (IEC 61000-4-5 Level 2); unsuitable for automotive load dump | Select when board space is constrained and surge threat level is limited to ESD and minor inductive spikes |
| 1.5KE91CA | Through-hole TO-204AA (DO-41), identical electrical specs but larger thermal mass and manual assembly requirement | Used in legacy industrial designs where automated SMT is unavailable or repairability is prioritized | Choose for prototyping, low-volume production, or field-replaceable modules where SMT rework is impractical |
Compared with 1.5SMC91CAHE3_A/H, SMBJ90CA offers smaller size but sacrifices 60 % peak power handling and automotive qualification, while 1.5KE91CA retains full electrical performance but requires through-hole assembly and lacks AEC-Q101 validation - making 1.5SMC91CAHE3_A/H the optimal choice for high-reliability SMT automotive and industrial deployments.
Availability
1.5SMC91CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O protection, and telecom line interface circuits requiring stable component supply, AEC-Q101 compliance, and consistent 1500 W surge immunity.
Supply support for 1.5SMC91CAHE3_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, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and automotive-grade qualification.
The 1.5SMC Series was engineered specifically for high-power, surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where compact size, AEC-Q101 compliance, and repeatable 1500 W surge performance are mandatory.
FAQ
What does the "HE3_A/H" suffix mean in 1.5SMC91CAHE3_A/H?
The "HE3" denotes RoHS-compliant and AEC-Q101 qualified construction; "_A/H" specifies the revision code "A" and tape-and-reel packaging in 7-inch reels (850 units per reel). This distinguishes 1.5SMC91CAHE3_A/H from commercial variants like 1.5SMC91CA-E3 and confirms its suitability for automotive production.
Is 1.5SMC91CAHE3_A/H unidirectional or bidirectional?
1.5SMC91CAHE3_A/H is a bidirectional TVS diode, as confirmed by the "CA" suffix and absence of cathode band marking. It provides symmetrical clamping for both positive and negative transients, making it ideal for protecting AC-coupled or floating signal paths without polarity constraints.
What is the maximum clamping voltage of 1.5SMC91CAHE3_A/H at rated surge current?
The maximum clamping voltage (VC) of 1.5SMC91CAHE3_A/H is 125 V at 12.0 A peak pulse current (IPPM), measured with a 10/1000 μs waveform. This value is guaranteed across temperature and ensures protected circuitry remains below critical overvoltage thresholds during surge events.
Does 1.5SMC91CAHE3_A/H meet automotive qualification standards?
Yes, 1.5SMC91CAHE3_A/H is AEC-Q101 qualified, verified per the full stress test schedule including HTGB, H3TRB, TC, and surge endurance. This certification covers operation from −65 °C to +150 °C and validates reliability for automotive powertrain, chassis, and ADAS applications.
How does the SMC (DO-214AB) package of 1.5SMC91CAHE3_A/H compare thermally to SMA or SMB packages?
The SMC package of 1.5SMC91CAHE3_A/H provides lower thermal resistance than SMA/SMB: RθJA = 75 °C/W (vs. ~100–120 °C/W for SMB), enabling higher sustained power dissipation. Its larger copper pad area (8.0 mm × 8.0 mm) improves heat spreading and supports repeated 1500 W surge events without thermal runaway.
1.5SMC91CAHE3_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):
- 77.8V
- Voltage - Breakdown (Min):
- 86.5V
- Voltage - Clamping (Max) @ Ipp:
- 125V
- Current - Peak Pulse (10/1000µs):
- 12A
- 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)
1.5SMC91CAHE3_A/H FAQ
1.How can I place an order for 1.5SMC91CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC91CAHE3_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 1.5SMC91CAHE3_A/H reliable?
The price and inventory of 1.5SMC91CAHE3_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 1.5SMC91CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC91CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC91CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC91CAHE3_A/H?
1.5SMC91CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC91CAHE3_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 1.5SMC91CAHE3_A/H?
For technical support, including 1.5SMC91CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC91CAHE3_A/H requirements.
6.How does Aetrix verify that 1.5SMC91CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC91CAHE3_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 1.5SMC91CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC91CAHE3_A/H?
All 1.5SMC91CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC91CAHE3_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 1.5SMC91CAHE3_A/H part is unused and in its original packaging.
Return procedure for 1.5SMC91CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC91CAHE3_A/H Tags
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