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Vishay General Semiconductor - Diodes Division 1.5SMC91CAHE3/57T
- Part No.:
- 1.5SMC91CAHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC91CAHE3/57T.pdf
- Description:
- TVS DIODE 77.8VWM 125VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:4,021
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Product details
Overview
1.5SMC91CAHE3/57T 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 91 V breakdown voltage (VBR min/max = 86.5 V / 95.5 V), 1500 W peak pulse power (10/1000 µs), clamping voltage of 125 V at 12 A, and ≤1.0 µA reverse leakage at 77.8 V stand-off voltage.
For engineers reviewing the 1.5SMC91CAHE3/57T datasheet, 1.5SMC91CAHE3/57T pinout, 1.5SMC91CAHE3/57T application, or 1.5SMC91CAHE3/57T equivalent, this AEC-Q101 qualified, RoHS-compliant TVS delivers robust ESD and lightning surge immunity in automotive sensor interfaces, industrial I/O modules, telecom line cards, and DC power rail protection where bidirectional clamping and low clamping ratio are critical.
Technical Context
The 1.5SMC91CAHE3/57T operates as a silicon avalanche diode with symmetrical bidirectional clamping behavior - no polarity marking required. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance, enabling consistent clamping under repetitive 10/1000 µs transients at 0.01% duty cycle.
Thermally, it supports operation from −65 °C to +150 °C junction temperature, with RθJA = 75 °C/W (on 8.0 mm × 8.0 mm copper pads) and RθJL = 15 °C/W. It meets J-STD-020 MSL Level 1 (260 °C peak reflow) 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 1.0 mA test current - defines precise avalanche initiation threshold in both directions |
| VWM | 77.8 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 125 V at 12.0 A peak pulse current - actual clamped voltage during 1500 W transient, determining protected circuit stress |
| ID @ VWM | ≤1.0 µA - ultra-low leakage preserves signal integrity and minimizes standby power loss |
| PPPM | 1500 W (10/1000 µs waveform) - energy-handling capacity sufficient for IEC 61000-4-5 Level 4 surges |
| TJ max | +150 °C - enables reliable operation in under-hood automotive and industrial ambient environments |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. No polarity marking - symmetric bidirectional structure.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Identical terminals - conducts equally in either direction when V > VBR; no cathode band or polarity indicator |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating differential lines without polarity concerns |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 combination wave surges up to 4 kV (open-circuit)/2 kA (short-circuit) without degradation |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes overvoltage exposure to downstream ICs - critical for protecting 100 V-rated MOSFETs or CAN transceivers |
| AEC-Q101 qualification | Validated for automotive use including temperature cycling (−40 °C to +125 °C), HTRB (1000 h @ 150 °C), and surge life testing |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking - simplifies SMT manufacturing flow |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting LIN/CAN bus nodes and analog sensor outputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and ground, absorbing transients before they reach MCU ADC or transceiver inputs. Use Value: Prevents latch-up or permanent damage to automotive-grade microcontrollers and analog front-ends under 100 V/10 ms load dump events. |
Use Scenario: Shielding PLC digital input channels from inductive kickback (e.g., relay coils, solenoids) and field wiring surges. IC Role / Device Role / Timing Role: Fast-response shunt device across input terminals, clamping spikes within 1 ns to limit voltage seen by optocoupler or Schmitt trigger input stage. Use Value: Eliminates false triggering and extends service life of industrial control hardware in factory-floor environments with frequent switching noise. |
| Telecom Line Card Protection | DC Power Rail Clamping |
Use Scenario: Safeguarding Ethernet PHYs, DSL line drivers, and POTS interface circuits against lightning-induced surges on twisted-pair lines. IC Role / Device Role / Timing Role: Primary surge suppression element in hybrid protection schemes - placed upstream of GDTs or polymer PTCs to handle fast-rising edges. Use Value: Maintains signal fidelity below 100 MHz while limiting transient overshoot to <125 V, preserving Ethernet auto-negotiation and link stability. |
Use Scenario: Secondary overvoltage clamp on 24 V or 48 V DC distribution rails feeding motor drives, LED drivers, or PoE injectors. IC Role / Device Role / Timing Role: Parallel-connected TVS that activates only during fault conditions (e.g., regulator failure, back-EMF reversal), diverting excess energy to ground. Use Value: Complements primary OVP ICs by handling high-energy, sub-millisecond overvoltages that exceed IC response time or current capability. |
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 peak power (600 W), same 90 V nominal VBR, SMB (DO-214AA) package - 30% smaller footprint, lower thermal mass | Suitable for space-constrained consumer electronics but insufficient for IEC 61000-4-5 Level 4 industrial surges | Select when board area is critical and surge energy is limited to ≤600 W (e.g., USB port protection). |
| 1.5KE91CA | Same VBR and PPPM, but axial-leaded DO-15 package - higher RθJA (~100 °C/W), not SMT-compatible | Used in through-hole legacy designs or prototyping; incompatible with automated SMT assembly | Choose only for hand-soldered repairs or non-SMT systems where leaded components are mandated. |
Compared with SMBJ90CA and 1.5KE91CA, the 1.5SMC91CAHE3/57T uniquely combines AEC-Q101 qualification, 1500 W surge rating, and SMC package thermal performance - making it the preferred choice for production automotive and industrial SMT applications demanding validated reliability and high-energy clamping.
Availability
1.5SMC91CAHE3/57T is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, telecom line interface units, and DC power distribution systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1.5SMC91CAHE3/57T 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, TVS devices, and optoelectronics with emphasis on ruggedness, precision, and automotive-grade reliability.
The 1.5SMC Series was engineered specifically for high-reliability transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where bidirectional surge immunity and AEC-Q101 validation are mandatory.
FAQ
What is the breakdown voltage tolerance for the 1.5SMC91CAHE3/57T?
The 1.5SMC91CAHE3/57T has a breakdown voltage (VBR) range of 86.5 V to 95.5 V at 1.0 mA test current, representing a ±5% tolerance around the nominal 91 V rating. This tight tolerance ensures predictable clamping onset and compatibility with system-level overvoltage thresholds defined for 24 V or 48 V DC architectures.
Is the 1.5SMC91CAHE3/57T suitable for automotive applications?
Yes - the 1.5SMC91CAHE3/57T carries full AEC-Q101 qualification (automotive ordering code HE3 suffix), including validation for temperature cycling, high-temperature reverse bias (HTRB), and surge endurance. It is explicitly rated for under-hood and chassis-mounted electronics exposed to −40 °C to +125 °C ambient and ISO 7637-2 transient profiles.
Does the 1.5SMC91CAHE3/57T have polarity markings?
No - the 1.5SMC91CAHE3/57T is a bidirectional TVS diode with symmetrical construction; there is no cathode band or polarity marking on the SMC (DO-214AB) package. Both terminals function identically, enabling straightforward placement on AC-coupled or floating differential signal paths without orientation constraints.
What is the maximum clamping voltage of the 1.5SMC91CAHE3/57T under surge conditions?
The 1.5SMC91CAHE3/57T clamps to a maximum of 125 V at its rated peak pulse current of 12.0 A (10/1000 µs waveform). This clamping voltage is guaranteed across temperature and lifetime, ensuring downstream components such as 100 V-rated MOSFETs or CAN FD transceivers remain within safe operating limits during surge events.
How does the 1.5SMC91CAHE3/57T differ from unidirectional variants like 1.5SMC91AHE3/57T?
The 1.5SMC91CAHE3/57T is bidirectional (CA suffix), providing symmetrical clamping in both polarities, whereas 1.5SMC91AHE3/57T is unidirectional (A suffix) with a cathode band and forward conduction capability. The CA version is used on AC lines or floating references; the A version suits DC rails where forward conduction must be blocked or leveraged.
1.5SMC91CAHE3/57T 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):
- 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)
1.5SMC91CAHE3/57T FAQ
1.How can I place an order for 1.5SMC91CAHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC91CAHE3/57T 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 1.5SMC91CAHE3/57T reliable?
The price and inventory of 1.5SMC91CAHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC91CAHE3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC91CAHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC91CAHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC91CAHE3/57T?
1.5SMC91CAHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC91CAHE3/57T 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 1.5SMC91CAHE3/57T?
For technical support, including 1.5SMC91CAHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC91CAHE3/57T requirements.
6.How does Aetrix verify that 1.5SMC91CAHE3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC91CAHE3/57T 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 1.5SMC91CAHE3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC91CAHE3/57T?
All 1.5SMC91CAHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC91CAHE3/57T, 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 1.5SMC91CAHE3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC91CAHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC91CAHE3/57T Tags
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