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Vishay General Semiconductor - Diodes Division 1.5SMC51AHE3_A/H
- Part No.:
- 1.5SMC51AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC51AHE3_A/H.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:8,104
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Product details
Overview
1.5SMC51AHE3_A/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 51 V breakdown voltage (VBR = 48.5–53.6 V at 1 mA), 43.6 V stand-off voltage (VWM), clamps to ≤70.1 V at 21.4 A peak pulse current (10/1000 µs), and delivers 1500 W peak pulse power. It is AEC-Q101 qualified and used in automotive sensor interfaces, industrial I/O protection, and DC power rail surge suppression.
For engineers reviewing the 1.5SMC51AHE3_A/H datasheet, 1.5SMC51AHE3_A/H pinout, 1.5SMC51AHE3_A/H application, or 1.5SMC51AHE3_A/H equivalent, key selection criteria include its unidirectional polarity, SMC (DO-214AB) package, 150 °C max junction temperature, low incremental surge resistance, and compliance with UL 497B for telecom and automotive protectors.
Technical Context
This TVS diode operates as a clamping device that remains high-impedance below VWM (43.6 V) and rapidly transitions to low-impedance conduction above VBR (min 48.5 V), limiting transient voltages to ≤70.1 V at rated IPPM. Its glass-passivated junction ensures stable avalanche characteristics and long-term reliability under repetitive surge stress.
Designed for surface-mount automated assembly, it meets J-STD-020 MSL Level 1 (260 °C peak reflow), has matte tin-plated leads compliant with JESD 22-B102, and supports 200 A non-repetitive forward surge (8.3 ms half-sine). Thermal resistance is 75 °C/W (junction-to-ambient) on standard 8.0 mm × 8.0 mm copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 48.5 V / 53.6 V at 1 mA - defines precise avalanche initiation threshold for repeatable clamping behavior |
| VWM | 43.6 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VC @ IPPM | ≤70.1 V at 21.4 A (10/1000 µs) - peak clamped voltage seen by protected circuit during worst-case surge |
| PPPM | 1500 W - peak transient power handling capability under standardized lightning/surge waveform |
| IFSM | 200 A (8.3 ms half-sine) - surge current rating for unidirectional forward conduction during fault events |
| TJ max | +150 °C - maximum junction temperature enabling operation in under-hood automotive and industrial environments |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads; cathode indicated by band marking; RoHS-compliant and halogen-free per Vishay HM3 specification; meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to system ground or low-side reference in unidirectional TVS configuration | Provides low-impedance path to ground during positive transients when cathode is biased above anode |
| Cathode | Current exit terminal in forward bias; connected to protected line (e.g., 12 V rail, CAN_H, sensor output) | Band-marked end; reverse-biased during normal operation; avalanches into conduction when line voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance per stress test plan |
| 1500 W peak pulse power (10/1000 µs) | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth, 2 kV line-line) without degradation |
| Glass-passivated junction | Ensures stable VBR tolerance (±5 %), low leakage (<1 µA at VWM), and immunity to humidity-induced parameter drift |
| MSL Level 1 moisture sensitivity | Enables standard SMT reflow without baking; compatible with high-volume automated placement and lead-free assembly |
| UL 497B recognition (QVGQ2) | Approved for use in telecom and data line protectors; simplifies safety certification for end equipment |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting analog sensor outputs (e.g., pressure, temperature) in engine control units from load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor signal line and chassis ground to clamp fast-rising spikes before they reach ADC input or signal conditioner. Use Value: Limits transient voltage to ≤70.1 V while maintaining <1 µA leakage at 43.6 V, preserving sensor accuracy and preventing ESD-induced latch-up in downstream ICs. |
Use Scenario: Safeguarding digital input channels of programmable logic controllers against field-wiring induced surges and ground loop transients. IC Role / Device Role / Timing Role: TVS mounted at connector interface to shunt surge energy away from optocoupler input or Schmitt trigger buffer. Use Value: Responds in <1 ps to transients, clamping within 100 ns to protect 24 V DC inputs rated for 30 V max, meeting IEC 61000-4-4 EFT immunity requirements. |
| DC Power Rail Protection | Telecom Line Interface |
|
Use Scenario: Secondary overvoltage protection on 48 V telecom power supplies and PoE injectors after primary DC-DC converter stage. IC Role / Device Role / Timing Role: Unidirectional TVS connected between +48 V rail and ground to absorb residual switching spikes and lightning-induced surges. Use Value: Handles 1500 W peak pulses without thermal runaway; RθJA = 75 °C/W enables reliable operation at full derating up to +105 °C ambient. |
Use Scenario: Protecting Ethernet PHY interface pins (e.g., MDI pairs) from induced surges on outdoor cabling per GR-1089-CORE. IC Role / Device Role / Timing Role: Paired unidirectional TVS devices on differential pair, referenced to local ground plane to suppress common-mode transients. Use Value: UL 497B recognition confirms suitability for telecom protector modules; low capacitance (<100 pF typical) avoids signal integrity degradation at 100 Mbps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51A-E3/52 | Same VBR range (48.5–53.6 V), but SMB package (smaller footprint, lower PPPM = 600 W) | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 or automotive load dump | Select only when board space is critical and surge threat level is ≤600 W (e.g., consumer USB ports) |
| 1.5KE51A | Through-hole DO-201 package; identical electrical specs but higher RθJA (~100 °C/W) and no AEC-Q101 qualification | Not suitable for automated SMT production or automotive under-hood use; requires wave soldering | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with 1.5SMC51AHE3_A/H, SMBJ51A-E3/52 trades surge robustness for compactness, while 1.5KE51A sacrifices SMT manufacturability and automotive qualification for mechanical ruggedness-neither offers drop-in replacement capability due to package or qualification mismatch.
Availability
1.5SMC51AHE3_A/H is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and telecom infrastructure requiring stable component supply with AEC-Q101 validation and UL recognition.
Supply support for 1.5SMC51AHE3_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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The 1.5SMC Series was engineered for high-power transient suppression in harsh environments-targeting automotive, industrial, and telecom applications where consistent clamping, surge endurance, and qualification compliance are mandatory.
FAQ
What is the exact breakdown voltage range for 1.5SMC51AHE3_A/H?
The 1.5SMC51AHE3_A/H has a guaranteed breakdown voltage (VBR) range of 48.5 V to 53.6 V at 1 mA test current, measured per ANSI/IEEE C62.35. This tight ±5 % tolerance ensures predictable clamping onset across production lots and temperature extremes from –65 °C to +150 °C.
Is 1.5SMC51AHE3_A/H suitable for bidirectional transient protection?
No, 1.5SMC51AHE3_A/H is a unidirectional TVS diode, identified by the "A" suffix and cathode band marking. For bidirectional protection, Vishay specifies part numbers ending in "CA" (e.g., 1.5SMC51CA). Using 1.5SMC51AHE3_A/H on AC or differential lines would result in forward conduction during negative half-cycles.
Does 1.5SMC51AHE3_A/H meet automotive qualification standards?
Yes, 1.5SMC51AHE3_A/H carries AEC-Q101 qualification, confirmed by the "HE3" suffix and documented in Vishay's 88303 datasheet revision 09-Mar-2026. It undergoes stress testing for temperature cycling, high-temperature reverse bias, and surge endurance per the AEC-Q101-011 standard.
What is the maximum clamping voltage of 1.5SMC51AHE3_A/H under surge conditions?
The maximum clamping voltage (VC) of 1.5SMC51AHE3_A/H is 70.1 V at 21.4 A peak pulse current (10/1000 µs waveform), as specified in the Electrical Characteristics table. This value represents the worst-case voltage imposed on the protected circuit during a standardized surge event.
How does the SMC package of 1.5SMC51AHE3_A/H compare to SMA or SMB in terms of power handling?
The SMC (DO-214AB) package of 1.5SMC51AHE3_A/H supports 1500 W peak pulse power, significantly higher than SMA (DO-214AC, ~400 W) or SMB (DO-214AA, ~600 W) packages. Its larger copper pad area (8.0 mm × 8.0 mm) and lower thermal resistance (RθJA = 75 °C/W) enable superior surge energy dissipation and thermal stability.
1.5SMC51AHE3_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):
- 43.6V
- Voltage - Breakdown (Min):
- 48.5V
- Voltage - Clamping (Max) @ Ipp:
- 70.1V
- Current - Peak Pulse (10/1000µs):
- 21.4A
- 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)
1.5SMC51AHE3_A/H FAQ
1.How can I place an order for 1.5SMC51AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC51AHE3_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 1.5SMC51AHE3_A/H reliable?
The price and inventory of 1.5SMC51AHE3_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 1.5SMC51AHE3_A/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC51AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC51AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC51AHE3_A/H?
1.5SMC51AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC51AHE3_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 1.5SMC51AHE3_A/H?
For technical support, including 1.5SMC51AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC51AHE3_A/H requirements.
6.How does Aetrix verify that 1.5SMC51AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC51AHE3_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 1.5SMC51AHE3_A/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC51AHE3_A/H?
All 1.5SMC51AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC51AHE3_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 1.5SMC51AHE3_A/H part is unused and in its original packaging.
Return procedure for 1.5SMC51AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC51AHE3_A/H Tags
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