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Vishay General Semiconductor - Diodes Division 1.5SMC91CAHE3_A/I
- Part No.:
- 1.5SMC91CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC91CAHE3_A/I.pdf
- Description:
- TVS DIODE 77.8VWM 125VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:2,374
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Product details
Overview
1.5SMC91CAHE3_A/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection on signal and power lines. It features a 91 V breakdown voltage (VBR min/max = 86.5 V / 95.5 V at 1 mA), 77.8 V stand-off voltage (VWM), clamps to ≤125 V at 12 A peak pulse current (IPPM), and delivers 1500 W peak pulse power with 10/1000 µs waveform - used in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5SMC91CAHE3_A/I datasheet, 1.5SMC91CAHE3_A/I pinout, 1.5SMC91CAHE3_A/I application, or 1.5SMC91CAHE3_A/I equivalent, this device serves as an AEC-Q101-qualified, RoHS-compliant bidirectional TVS for robust ESD and lightning surge suppression where low clamping voltage, fast response (<1 ns), and stable temperature coefficient (0.106 %/°C) are critical selection criteria.
Technical Context
The 1.5SMC91CAHE3_A/I operates as a voltage-clamped avalanche diode, symmetrically conducting in both directions above its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5 %), low incremental surge resistance, and repeatable clamping performance under repetitive 10/1000 µs transients at 0.01 % duty cycle.
Thermally, it supports operation from −65 °C to +150 °C with RθJA = 75 °C/W (on recommended 8.0 mm × 8.0 mm copper pads) and RθJL = 15 °C/W. It meets MSL Level 1 per J-STD-020 and is qualified to AEC-Q101 for automotive under-hood and chassis applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 86.5 V / 95.5 V at IT = 1 mA - defines precise avalanche onset window for reliable overvoltage triggering |
| VWM | 77.8 V - maximum continuous reverse operating voltage before leakage exceeds 1 μA |
| VC @ IPPM | ≤125 V at 12 A (10/1000 µs) - clamping voltage limiting downstream IC stress during surge events |
| PPPM | 1500 W - peak surge energy handling capacity without failure under standardized waveform |
| IPPM | 12 A - maximum non-repetitive surge current the device safely clamps without degradation |
| TJ max | +150 °C - enables use in high-ambient environments such as engine control units and motor drives |
| Temp. Coeff. of VBR | +0.106 %/°C - ensures predictable VBR drift across temperature for stable protection margins |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional configuration with no polarity marking - symmetrical terminal layout optimized for automated placement and high-current PCB routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path (bidirectional) | Either terminal serves as input/output; no cathode band - enables flexible board layout and eliminates orientation errors |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance per JEDEC standards |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV) surges on 2 Ω source impedance without parametric shift |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes voltage overshoot across protected circuitry, reducing risk of latch-up or gate oxide damage in MOSFETs and ICs |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and reflow at 260 °C peak without preconditioning - simplifies SMT manufacturing |
| Glass-passivated junction | Ensures long-term stability of VBR and leakage current under thermal and humidity stress |
Applications
| Automotive Sensor Interface | Industrial PLC Analog Input |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog front-ends in engine control modules from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential signal pair or supply rail to shunt surge energy before it reaches sensitive ASICs. Use Value: Maintains signal integrity by clamping transients to ≤125 V while surviving >1000 surges at rated IPPM, meeting OEM EMC requirements. |
Use Scenario: Safeguarding 4–20 mA current loop inputs in programmable logic controllers against field-wiring induced surges and ESD. IC Role / Device Role / Timing Role: Standoff-connected TVS between input terminals and ground, activated only during overvoltage events >77.8 V. Use Value: Prevents input stage saturation or op-amp damage during 1 kV/500 A surge tests (IEC 61000-4-5), preserving measurement accuracy. |
| Telecom Power Supply Rail | Consumer USB Port Protection |
Use Scenario: Secondary-side overvoltage suppression on +12 V or +48 V telecom DC-DC outputs exposed to lightning-induced coupling. IC Role / Device Role / Timing Role: Parallel-connected TVS across output capacitor to clamp fast-rising transients before they propagate to downstream converters. Use Value: Limits voltage excursion to <125 V within <1 ns, preventing secondary-side MOSFET avalanche failure and ensuring system-level safety compliance. |
Use Scenario: Bidirectional ESD and surge protection on USB 2.0 D+/D− lines in portable media devices and docking stations. IC Role / Device Role / Timing Role: Low-capacitance (CJ ≈ 100 pF at 0 V) TVS placed directly at connector to divert ±15 kV contact discharge per IEC 61000-4-2. Use Value: Enables full-speed USB signaling integrity while passing Class 4 ESD immunity without signal attenuation or jitter increase. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90CA | Lower PPPM (600 W), same VWM (77.5 V), SMB package (smaller footprint, higher RθJA) | Suitable for space-constrained consumer electronics but not for automotive or industrial surge testing | Select when board area is limited and surge energy is ≤600 W; verify thermal derating at elevated ambient temperatures |
| 1.5KE91CA | Through-hole DO-201 package, identical electrical specs, lower cost, no AEC-Q101 qualification | Applicable in non-automotive industrial equipment where automated SMT is not required | Choose for legacy designs or cost-sensitive applications where AEC-Q101 and MSL Level 1 are not mandated |
Compared with SMBJ90CA and 1.5KE91CA, the 1.5SMC91CAHE3_A/I uniquely combines AEC-Q101 qualification, 1500 W surge rating, and SMC surface-mount compatibility - making it the only option among the three validated for high-reliability automotive and industrial SMT production.
Availability
1.5SMC91CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O hardening, and telecom power rail stabilization requiring stable component supply, traceable sourcing, and lifecycle continuity.
Supply support for 1.5SMC91CAHE3_A/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 high-reliability diodes, MOSFETs, 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 compliance, low clamping voltage, and robust surge endurance across wide temperature ranges.
FAQ
What is the meaning of the "CA" suffix in 1.5SMC91CAHE3_A/I?
The "CA" suffix in 1.5SMC91CAHE3_A/I denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression in both polarities, with no cathode marking and identical VBR, VWM, and VC characteristics in either direction. This is essential for protecting AC-coupled or differential signal lines where polarity reversal may occur.
Is 1.5SMC91CAHE3_A/I suitable for IEC 61000-4-5 surge testing?
Yes, 1.5SMC91CAHE3_A/I is rated for 1500 W peak pulse power with a 10/1000 µs waveform, which aligns with IEC 61000-4-5 Level 4 (4 kV, 2 Ω source) test conditions. When mounted per the recommended 8.0 mm × 8.0 mm copper pad layout, it reliably clamps to ≤125 V at 12 A, satisfying pass criteria for protected circuits.
Does 1.5SMC91CAHE3_A/I have AEC-Q101 qualification?
Yes, the "HE3" suffix in 1.5SMC91CAHE3_A/I explicitly indicates RoHS-compliant and AEC-Q101-qualified construction. This certification covers stress tests including temperature cycling, high-temperature reverse bias (HTRB), and surge endurance - confirming suitability for automotive under-hood and chassis applications.
What is the maximum operating temperature for 1.5SMC91CAHE3_A/I?
The 1.5SMC91CAHE3_A/I has a maximum junction temperature (TJ) of +150 °C and an operating junction/storage temperature range of −65 °C to +150 °C. Its thermal resistance (RθJA = 75 °C/W) allows sustained operation at full power in ambient temperatures up to +85 °C when using the specified PCB copper pad layout.
How does the clamping voltage of 1.5SMC91CAHE3_A/I compare to its breakdown voltage?
The 1.5SMC91CAHE3_A/I has a typical breakdown voltage (VBR) range of 86.5 V to 95.5 V and clamps to ≤125 V at 12 A (10/1000 µs). This yields a clamping ratio (VC/VBR) of approximately 1.31, indicating tight voltage control during surge events - critical for protecting 100 V-rated MOSFETs and 3.3 V/5 V logic interfaces downstream.
1.5SMC91CAHE3_A/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:
- 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/I FAQ
1.How can I place an order for 1.5SMC91CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC91CAHE3_A/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 1.5SMC91CAHE3_A/I reliable?
The price and inventory of 1.5SMC91CAHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC91CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC91CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC91CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC91CAHE3_A/I?
1.5SMC91CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC91CAHE3_A/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 1.5SMC91CAHE3_A/I?
For technical support, including 1.5SMC91CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC91CAHE3_A/I requirements.
6.How does Aetrix verify that 1.5SMC91CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC91CAHE3_A/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 1.5SMC91CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC91CAHE3_A/I?
All 1.5SMC91CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC91CAHE3_A/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 1.5SMC91CAHE3_A/I part is unused and in its original packaging.
Return procedure for 1.5SMC91CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC91CAHE3_A/I Tags
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