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Vishay General Semiconductor - Diodes Division 1.5SMC30AHE3_A/H
- Part No.:
- 1.5SMC30AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC30AHE3_A/H.pdf
- Description:
- TVS DIODE 25.6VWM 41.4VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:2,598
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Product details
Overview
1.5SMC30AHE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 30 V standoff voltage (VWM), 31.5 V maximum breakdown voltage (VBR), and 41.4 V clamping voltage (VC) at 36.2 A peak pulse current (IPPM). It delivers 1500 W peak pulse power (10/1000 μs), supports automotive-grade reliability via AEC-Q101 qualification, and is used to protect MOSFETs, ICs, and sensor signal lines against lightning-induced transients and inductive switching spikes.
For engineers reviewing the 1.5SMC30AHE3_A/H datasheet, 1.5SMC30AHE3_A/H pinout, 1.5SMC30AHE3_A/H application, or 1.5SMC30AHE3_A/H equivalent, this device is selected for robust overvoltage protection in automotive powertrain modules, industrial motor drives, and telecom interface circuits where fast response (<1 ns), low clamping ratio (VC/VBR ≈ 1.31), and MSL Level 1 moisture sensitivity are critical design requirements.
Technical Context
The 1.5SMC30AHE3_A/H operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to achieve stable reverse breakdown and low incremental surge resistance. Its clamping behavior is defined by a 10/1000 μs double-exponential waveform, with thermal derating above 25 °C per Fig. 2 and peak pulse current limited by junction temperature (TJ max = 150 °C).
It features a cathode-band polarity marking, matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and meets UL 94 V-0 flammability rating. The device is rated for repetitive surge duty cycle of 0.01 % and supports unidirectional forward surge current up to 200 A (8.3 ms half-sine).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 25.6 V - Maximum continuous reverse operating voltage before conduction begins; defines circuit's normal operating margin. |
| VBR (Breakdown) | 28.5–31.5 V at 1 mA - Voltage at which avalanche conduction initiates; ensures predictable turn-on under transient stress. |
| VC (Clamping) | 41.4 V at 36.2 A - Maximum voltage seen by protected circuit during 10/1000 μs surge; determines safe voltage headroom for downstream ICs. |
| PPPM | 1500 W - Peak transient energy absorption capability; enables protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω). |
| ID (Leakage) | 1.0 μA at 25.6 V - Reverse leakage current at VWM; ensures minimal standby power loss and signal integrity in high-impedance nodes. |
| TJ max | 150 °C - Maximum junction temperature; sets thermal design limits for PCB copper pad area (8.0 mm × 8.0 mm recommended). |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance; informs heatsinking requirements for sustained power dissipation (PD = 6.5 W). |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads and cathode band marking. Dimensions: 7.75 mm × 6.22 mm × 2.62 mm (L × W × H); MSL Level 1, reflow compatible up to 260 °C peak.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to ground or low-side reference in unidirectional TVS configuration. | Provides return path for surge current during clamping; must be routed with low-inductance trace to minimize overshoot. |
| Cathode | Current exit terminal in forward bias; marked with band; connected to protected line (e.g., CAN_H, RS-485 A/B, power rail). | Defines polarity-sensitive placement-reversal causes catastrophic failure under normal operation due to forward conduction. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor interfaces; supports 15-year lifecycle reliability under thermal cycling and humidity exposure. |
| 1500 W peak pulse power | Withstands 10/1000 μs surges up to 36.2 A-sufficient for ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 Combination Wave (4 kV) testing. |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes overvoltage stress on protected devices-critical for 3.3 V or 5 V logic rails where margin below absolute maximum ratings is tight. |
| MSL Level 1, 260 °C peak reflow | Enables standard lead-free SMT assembly without pre-baking; eliminates moisture-related popcorning risk during manufacturing. |
| Glass-passivated junction | Ensures stable breakdown voltage over time and temperature; reduces parameter drift vs. epoxy-passivated alternatives in harsh environments. |
Applications
| Automotive Powertrain ECU Protection | Industrial Motor Drive Signal Lines |
|---|---|
Use Scenario: Protecting microcontroller I/O pins and LIN bus transceivers from load dump and alternator ripple in engine control units. IC Role / Device Role: Unidirectional TVS placed between LIN data line and chassis ground to clamp transients exceeding 25.6 V. Use Value: Prevents latch-up or gate oxide damage in 3.3 V MCU peripherals by limiting clamped voltage to 41.4 V during 100 A surge events. |
Use Scenario: Shielding encoder feedback signals (A/B/Z) from commutation noise and back-EMF spikes in servo drives. IC Role / Device Role: TVS mounted across differential pair inputs of RS-422 receiver to suppress common-mode surges up to 1500 W. Use Value: Maintains signal integrity by limiting transient-induced jitter and preventing false edge detection during 10/1000 μs inductive kicks. |
| Telecom Base Station DC Power Input | Consumer Smart Meter Sensor Interface |
Use Scenario: Guarding 48 V DC input stage of remote radio unit against lightning-induced surges entering via outdoor cabling. IC Role / Device Role: Primary unidirectional TVS on main power rail upstream of DC-DC converter, referenced to system ground. Use Value: Absorbs 4 kV IEC 61000-4-5 surges without degradation, enabling compliance with EN 61000-4-5 Class 4 immunity requirements. |
Use Scenario: Securing current transformer (CT) and shunt-based current sensing inputs in smart electricity meters exposed to grid switching transients. IC Role / Device Role: TVS placed across analog front-end inputs to clamp fast-rising transients before ADC input stages. Use Value: Preserves measurement accuracy by preventing saturation or damage to precision op-amps operating at ±2.5 V rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30A-E3/57T | Same VWM (25.6 V), lower PPPM (400 W), SMA package (smaller footprint, higher RθJA = 110 °C/W). | Not suitable for 1500 W surge events; limited to low-energy I/O protection in space-constrained consumer designs. | Select only when board area is critical and surge threat level is ≤ IEC 61000-4-5 Level 2 (1 kV). |
| 1.5KE30A | Through-hole DO-201 package, identical electrical specs (VWM, VBR, VC), but no AEC-Q101 qualification or MSL Level 1 rating. | Excludes automotive production use; requires wave soldering and lacks reflow compatibility for mixed-technology boards. | Use for cost-sensitive industrial prototypes where AEC-Q101 and SMT process compatibility are not required. |
Compared with SMAJ30A-E3/57T and 1.5KE30A, the 1.5SMC30AHE3_A/H uniquely combines automotive qualification, 1500 W surge capacity, and SMC package thermal performance-making it the only option for production-grade AEC-Q101-compliant systems requiring full IEC 61000-4-5 Level 4 immunity.
Availability
1.5SMC30AHE3_A/H is available at Aetrix Electronics and suitable for automotive powertrain modules, industrial motor drive controllers, and telecom base station power supplies requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant surge protection.
Supply support for 1.5SMC30AHE3_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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5SMC Series was engineered for high-power, surface-mount transient suppression in automotive, industrial, and telecom infrastructure-prioritizing clamping precision, surge endurance, and manufacturability in automated SMT lines.
FAQ
What is the clamping voltage of the 1.5SMC30AHE3_A/H under a 10/1000 μs surge?
The 1.5SMC30AHE3_A/H has a maximum clamping voltage (VC) of 41.4 V at 36.2 A peak pulse current (IPPM) under a 10/1000 μs waveform. This value is measured per Fig. 1 and Fig. 3 of the Vishay datasheet (Doc. #88303), and defines the upper voltage limit imposed on protected circuitry during standardized surge events. The 1.5SMC30AHE3_A/H maintains this clamping performance across its specified operating temperature range (−65 °C to +150 °C).
Is the 1.5SMC30AHE3_A/H qualified for automotive applications?
Yes, the 1.5SMC30AHE3_A/H is AEC-Q101 qualified, as confirmed by the "HE3" suffix and documentation in the Vishay 1.5SMC Series datasheet (Rev. 09-Mar-2026). This qualification covers stress tests including temperature cycling, humidity bias, and mechanical shock-validating suitability for under-hood and ADAS applications. The 1.5SMC30AHE3_A/H is explicitly listed in the AEC-Q101 qualified variants table (Note 1, page 3).
What is the standoff voltage (VWM) and why does it matter for the 1.5SMC30AHE3_A/H?
The 1.5SMC30AHE3_A/H has a maximum reverse standoff voltage (VWM) of 25.6 V, meaning it remains non-conductive up to this DC or RMS voltage level. This parameter ensures the 1.5SMC30AHE3_A/H does not interfere with normal circuit operation-e.g., in a 24 V automotive system-while still triggering reliably during transients exceeding ~28.5 V (VBR min). Selecting VWM ≥ 110 % of nominal line voltage prevents nuisance conduction.
Can the 1.5SMC30AHE3_A/H be used in bidirectional configurations?
No, the 1.5SMC30AHE3_A/H is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. Bidirectional operation requires the "CA" suffix (e.g., 1.5SMC30CA). Using the 1.5SMC30AHE3_A/H in a bidirectional signal path would result in forward conduction during negative transients, causing failure. Always verify polarity alignment during layout-cathode connects to the line being protected.
What is the thermal resistance and how does it affect PCB layout for the 1.5SMC30AHE3_A/H?
The 1.5SMC30AHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W, measured on 8.0 mm × 8.0 mm copper pads per terminal. To maintain TJ ≤ 150 °C during repetitive surges or continuous power dissipation (PD = 6.5 W), the PCB must provide adequate copper area and thermal vias. Reducing pad size increases RθJA, risking thermal runaway-so the 1.5SMC30AHE3_A/H requires strict adherence to the recommended mounting pad layout shown in Fig. 6.
1.5SMC30AHE3_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):
- 25.6V
- Voltage - Breakdown (Min):
- 28.5V
- Voltage - Clamping (Max) @ Ipp:
- 41.4V
- Current - Peak Pulse (10/1000µs):
- 36.2A
- 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)
1.5SMC30AHE3_A/H FAQ
1.How can I place an order for 1.5SMC30AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC30AHE3_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 1.5SMC30AHE3_A/H reliable?
The price and inventory of 1.5SMC30AHE3_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 1.5SMC30AHE3_A/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC30AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC30AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC30AHE3_A/H?
1.5SMC30AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC30AHE3_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 1.5SMC30AHE3_A/H?
For technical support, including 1.5SMC30AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC30AHE3_A/H requirements.
6.How does Aetrix verify that 1.5SMC30AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC30AHE3_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 1.5SMC30AHE3_A/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC30AHE3_A/H?
All 1.5SMC30AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC30AHE3_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 1.5SMC30AHE3_A/H part is unused and in its original packaging.
Return procedure for 1.5SMC30AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC30AHE3_A/H Tags
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