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Vishay General Semiconductor - Diodes Division 1.5SMC91AHE3_A/H
- Part No.:
- 1.5SMC91AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC91AHE3_A/H.pdf
- Description:
- TVS DIODE 77.8VWM 125VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:6,954
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Product details
Overview
1.5SMC91AHE3_A/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection on DC power rails and signal lines. It features 91 V breakdown voltage (VBR min/max: 86.5 V / 95.5 V), 125 V maximum clamping voltage (VC) at 12 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 μs waveform - used to safeguard automotive ECUs, industrial I/O modules, and telecom interface circuits against lightning-induced transients and inductive switching spikes.
For engineers reviewing the 1.5SMC91AHE3_A/H datasheet, 1.5SMC91AHE3_A/H pinout, 1.5SMC91AHE3_A/H application, or 1.5SMC91AHE3_A/H equivalent, key selection criteria include its AEC-Q101 qualification, 77.8 V stand-off voltage (VWM), ≤1.0 μA reverse leakage at VWM, low thermal resistance (RθJL = 15 °C/W), and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This device operates as a unidirectional clamping TVS diode: under normal conditions it presents high impedance above 77.8 V reverse stand-off voltage, then rapidly transitions to low-impedance conduction when transient voltage exceeds 86.5 V (min) breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5%) and fast response time (<1 ns).
Thermally, it supports continuous operation up to +150 °C junction temperature and derates linearly above 25 °C ambient per Fig. 2. The SMC package enables 6.5 W steady-state power dissipation on infinite heatsink at 50 °C, with RθJA = 75 °C/W in standard mounting (0.31" × 0.31" copper pads).
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 clamping onset window for reliable overvoltage detection |
| VWM | 77.8 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 125 V at 12.0 A - clamping voltage during 1500 W surge, limiting protected circuit stress |
| IPPM | 12.0 A - peak pulse current capability with 10/1000 μs waveform, validated for repetitive 0.01% duty cycle |
| PPPM | 1500 W - peak pulse power handling, enabling robust protection against IEC 61000-4-5 Level 4 surges |
| TJ max | +150 °C - maximum junction temperature, supporting under-hood automotive and industrial environments |
| Leakage @ VWM | ≤1.0 μA - ensures minimal standby power loss and signal integrity in high-impedance circuits |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to lower-potential side of protected line (e.g., ground or return path) |
| Cathode | Current exit terminal during reverse-biased clamping | Connected to higher-potential side (e.g., VCC, signal line); band-marked end |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD47 |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 4 kV/2 Ω surge without degradation when mounted per recommended pad layout |
| Glass-passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift |
| MSL Level 1 (260 °C) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., EFT bursts), improving system-level immunity |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Card |
|---|---|
Use Scenario: Protecting 12 V supply rail and LIN bus lines from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between power rail and ground, activated within <1 ns of overvoltage event. Use Value: Limits rail voltage to ≤125 V during 100 V/50 ms load dump, preventing damage to MCU and CAN/LIN transceivers. |
Use Scenario: Shielding 24 V digital input channels from field-wiring induced surges in factory automation. IC Role / Device Role / Timing Role: Standoff protector on each optocoupler input, conducting only during >77.8 V transients. Use Value: Maintains <1.0 μA leakage at 24 V nominal, preserving input threshold accuracy while surviving 1 kV/500 Ω IEC 61000-4-5 surges. |
| Telecom Base Station Power Interface | Consumer Appliance Motor Driver Board |
Use Scenario: Safeguarding 48 V DC-DC converter inputs against lightning-induced surges on outdoor feeder lines. IC Role / Device Role / Timing Role: Primary front-end clamp on power entry, coordinated with upstream fuse and downstream LC filter. Use Value: Clamps 1500 W surges to 125 V, reducing stress on downstream MOSFETs and enabling use of 150 V-rated components. |
Use Scenario: Suppressing inductive kickback from brushed DC motor commutation on microcontroller I/O lines. IC Role / Device Role / Timing Role: Fast-response unidirectional suppressor across motor coil terminals and logic-side flyback paths. Use Value: Responds in <1 ns to 100 V/100 ns spikes, preventing latch-up in 3.3 V GPIOs and extending MCU lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ90A | Same VWM (77.5 V), slightly lower VC (123 V @ 12.2 A), but only rated for 400 W PPPM | Limited to lower-energy transients (IEC 61000-4-5 Level 2); not AEC-Q101 qualified | Select when cost sensitivity outweighs automotive qualification and 1500 W surge margin |
| 1.5KE91A | Through-hole DO-201 package, identical electrical specs, but incompatible with SMT assembly and higher RθJA (100 °C/W) | Requires manual or wave-solder process; unsuitable for high-density PCBs or automated production | Choose only for legacy through-hole designs or prototyping where rework flexibility is prioritized |
Compared with SMAJ90A and 1.5KE91A, the 1.5SMC91AHE3_A/H delivers full 1500 W surge capability in an AEC-Q101-qualified SMT package with superior thermal performance (RθJL = 15 °C/W), making it the preferred choice for volume automotive and industrial applications requiring both reliability and manufacturability.
Availability
1.5SMC91AHE3_A/H is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and telecom infrastructure requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant surge protection.
Supply support for 1.5SMC91AHE3_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 power MOSFETs with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5SMC Series was engineered for high-power transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness, AEC-Q101 compliance, and repeatable clamping performance are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC91AHE3_A/H under maximum surge conditions?
The 1.5SMC91AHE3_A/H exhibits a maximum clamping voltage (VC) of 125 V when subjected to its rated 12.0 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is guaranteed per datasheet Table on page 2 and defines the upper voltage limit imposed on protected circuitry during worst-case transient events. The 1.5SMC91AHE3_A/H maintains this clamping performance across its full operating temperature range (–65 °C to +150 °C) when mounted per recommended pad layout.
Is the 1.5SMC91AHE3_A/H qualified for automotive applications?
Yes, the 1.5SMC91AHE3_A/H carries AEC-Q101 qualification, confirmed in the Vishay datasheet revision 09-Mar-2026 (Document Number: 88303), Section "Mechanical Data". The "HE3" suffix explicitly denotes RoHS-compliant and AEC-Q101-qualified variants. This qualification covers stress tests including temperature cycling, high-temperature reverse bias (HTRB), and electrostatic discharge (ESD), validating suitability for under-hood and body electronics in passenger vehicles and commercial vehicles.
What is the reverse stand-off voltage (VWM) of the 1.5SMC91AHE3_A/H, and why does it matter?
The 1.5SMC91AHE3_A/H has a reverse stand-off voltage (VWM) of 77.8 V, meaning it remains non-conductive with ≤1.0 μA leakage up to this DC or RMS voltage. This parameter ensures no interference with normal circuit operation - for example, it allows safe use on 72 V battery systems or 48 V industrial rails where nominal voltage must remain below VWM. Exceeding VWM risks premature conduction and power loss, so proper margin (typically ≥10–15%) between system max voltage and VWM is critical in 1.5SMC91AHE3_A/H designs.
How does the 1.5SMC91AHE3_A/H differ from bidirectional TVS diodes like 1.5SMC91CA?
The 1.5SMC91AHE3_A/H is unidirectional and functions only during reverse-biased overvoltage events - it conducts from cathode to anode when voltage exceeds VBR, but blocks forward current like a standard diode. In contrast, 1.5SMC91CA is bidirectional and clamps symmetrically in both polarities, making it suitable for AC lines or differential signals. The 1.5SMC91AHE3_A/H's unidirectional nature provides lower capacitance and tighter VBR tolerance, ideal for DC power rail and single-ended signal protection where polarity is fixed.
What package type and mounting requirements apply to the 1.5SMC91AHE3_A/H?
The 1.5SMC91AHE3_A/H uses the SMC (DO-214AB) surface-mount package, with mechanical dimensions specified in inches/mm on page 5 of the Vishay datasheet. Recommended mounting requires 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal to achieve rated 1500 W pulse power and thermal performance (RθJA = 75 °C/W). It is MSL Level 1 compliant and compatible with standard lead-free reflow profiles peaking at 260 °C, with matte tin-plated leads meeting J-STD-002 solderability standards.
1.5SMC91AHE3_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:
- 1
- Bidirectional Channels:
- -
- 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)
1.5SMC91AHE3_A/H FAQ
1.How can I place an order for 1.5SMC91AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC91AHE3_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 1.5SMC91AHE3_A/H reliable?
The price and inventory of 1.5SMC91AHE3_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 1.5SMC91AHE3_A/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC91AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC91AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC91AHE3_A/H?
1.5SMC91AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC91AHE3_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 1.5SMC91AHE3_A/H?
For technical support, including 1.5SMC91AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC91AHE3_A/H requirements.
6.How does Aetrix verify that 1.5SMC91AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC91AHE3_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 1.5SMC91AHE3_A/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC91AHE3_A/H?
All 1.5SMC91AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC91AHE3_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 1.5SMC91AHE3_A/H part is unused and in its original packaging.
Return procedure for 1.5SMC91AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC91AHE3_A/H Tags
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