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Vishay General Semiconductor - Diodes Division SM15T36AHM3_A/H
- Part No.:
- SM15T36AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T36AHM3_A/H.pdf
- Description:
- TVS DIODE 30.8VWM 49.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,612
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Product details
Overview
SM15T36AHM3_A/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 30.8 V stand-off voltage (VWM), 34.2–37.8 V breakdown voltage (VBR), and 49.9 V maximum clamping voltage (VC) at 30 A peak pulse current - used to protect automotive sensor signal lines against inductive switching transients.
For engineers reviewing the SM15T36AHM3_A/H datasheet, SM15T36AHM3_A/H pinout, SM15T36AHM3_A/H application, or SM15T36AHM3_A/H equivalent, key selection criteria include clamping voltage margin vs. protected IC's absolute maximum rating, unidirectional polarity alignment with DC bias, thermal derating above 25 °C, and AEC-Q101 qualification for automotive under-hood deployment.
Technical Context
This TVS operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR, it avalanches into low-impedance conduction to divert surge current away from downstream circuitry. Its glass-passivated junction ensures stable breakdown and low leakage (<1 μA at VWM).
Designed for high-energy threats (e.g., ISO 7637-2 Pulse 1/2a/5a), it delivers 1500 W peak pulse power with low inductance and meets MSL Level 1 reflow compatibility (260 °C peak). The HM3 suffix confirms halogen-free, RoHS-compliant, and AEC-Q101 qualified construction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30.8 V - maximum continuous reverse operating voltage before leakage exceeds 1 μA; sets upper limit for safe DC bias in protected line |
| VBR @ IT=1 mA | 34.2–37.8 V - guaranteed avalanche initiation range; ensures reliable turn-on before downstream IC damage threshold |
| VC @ IPPM=30 A | 49.9 V - clamped voltage during 10/1000 μs surge; must stay below protected device's absolute max rating |
| PPPM | 1500 W - peak pulse power handling per JEDEC standard waveform; validates suitability for lightning-induced or motor-switching transients |
| TJ max | +150 °C - maximum junction temperature; enables operation in under-hood automotive environments with thermal derating |
| RθJA | 75 °C/W - junction-to-ambient thermal resistance on recommended 8 mm × 8 mm copper pads; informs PCB thermal layout requirements |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode indicated by band marking; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-biased avalanche terminal | Connected to protected line; conducts surge current to ground when VLINE > VBR |
| Anode (unmarked end) | Reference/return path | Typically tied to system ground or lowest potential node; completes shunt path during clamping |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Validates robustness against ISO 7637-2 Pulse 5a (load dump) and industrial motor-switching surges |
| AEC-Q101 qualified (HM3 suffix) | Confirms reliability for automotive applications including engine control, ADAS sensors, and body electronics |
| Low clamping ratio (VC/VBR ≈ 1.36) | Minimizes overvoltage stress on protected ICs while maintaining fast response time |
| Halogen-free, RoHS-compliant | Meets environmental compliance requirements for global automotive and industrial OEMs |
Applications
| Automotive Sensor Protection | Industrial Motor Drive I/O |
|---|---|
Use Scenario: Protecting LIN bus or analog sensor outputs (e.g., pressure, temperature) in engine bay modules exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between signal line and chassis ground, clamping transients before they reach MCU ADC input or transceiver. Use Value: Clamps to 49.9 V at 30 A, staying below typical 50 V absolute max rating of automotive-grade op-amps and transceivers. | Use Scenario: Safeguarding PLC analog input channels connected to 24 V DC field sensors near contactors and solenoids. IC Role / Device Role / Timing Role: Standoff-rated TVS on each channel's signal trace, absorbing inductive kickback from relay coils and valve drivers. Use Value: 1500 W rating handles repetitive 10/1000 μs surges up to 30 A without degradation, verified per AEC-Q101 stress testing. |
| Telecom Power Interface | Consumer Appliance Control Board |
Use Scenario: Input-side protection on 48 V PoE-powered telecom equipment front-end DC/DC converters. IC Role / Device Role / Timing Role: Primary overvoltage clamp on secondary-side 48 V rail, coordinated with upstream fuse and MOV for staged surge suppression. Use Value: 30.8 V VWM allows safe operation across full 48 V ±10% tolerance while clamping to 49.9 V during transients. | Use Scenario: Shielding microcontroller GPIOs and display backlight drivers in smart home appliances subject to ESD and mains-coupled noise. IC Role / Device Role / Timing Role: Localized TVS on each high-speed control line (e.g., I²C, PWM), mounted adjacent to connector entry points. Use Value: Low-inductance SMC package minimizes voltage overshoot during sub-100 ns ESD events, preserving signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36A-E3/57T | 600 W PPPM, SMA package, non-AEC-Q101, VC = 58.1 V @ 10.3 A | Limited to commercial-grade consumer/industrial use; lower surge capacity and no automotive qualification | Select when cost sensitivity outweighs automotive reliability requirements and surge threat level is ≤600 W |
| SMCJ36A-QH | 1500 W PPPM, same SMC package, AEC-Q101 qualified, VC = 58.1 V @ 25.8 A | Higher clamping voltage (58.1 V vs. 49.9 V) reduces margin for 50 V-tolerant ICs | Choose only if supply-chain constraints prevent SM15T36AHM3_A/H sourcing; verify protected IC withstands +8.2 V higher clamping |
Compared with SMAJ36A-E3/57T and SMCJ36A-QH, SM15T36AHM3_A/H offers superior clamping performance (49.9 V) within the same AEC-Q101-qualified SMC footprint - critical for protecting 50 V absolute-maximum ICs in automotive sensor nodes where voltage margin is constrained.
Availability
SM15T36AHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial motor drive I/O, and telecom power interface applications requiring stable component supply, long-term lifecycle support, and AEC-Q101 compliance.
Supply support for SM15T36AHM3_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 optoelectronics with emphasis on reliability, power handling, and automotive qualification.
The SM15T Series is designed specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where 1500 W surge immunity and AEC-Q101 validation are mandatory.
FAQ
What is the clamping voltage of SM15T36AHM3_A/H at its rated peak pulse current?
The SM15T36AHM3_A/H has a maximum clamping voltage (VC) of 49.9 V when subjected to a 10/1000 μs waveform at 30 A peak pulse current (IPPM). This value is measured per JEDEC standards and is critical for ensuring the protected circuit remains below its absolute maximum voltage rating during surge events. The SM15T36AHM3_A/H achieves this with a low clamping ratio of approximately 1.36 relative to its nominal breakdown voltage.
Is SM15T36AHM3_A/H suitable for automotive applications?
Yes, SM15T36AHM3_A/H is AEC-Q101 qualified, halogen-free, and RoHS-compliant - explicitly intended for automotive use cases including engine control units, ADAS sensor interfaces, and body electronics. Its construction, thermal performance (TJ max = +150 °C), and surge robustness (1500 W, 10/1000 μs) meet stringent automotive environmental and reliability requirements. The HM3 suffix confirms this qualification status.
What does the "HM3" suffix mean in SM15T36AHM3_A/H?
The "HM3" suffix in SM15T36AHM3_A/H indicates halogen-free, RoHS-compliant, and AEC-Q101 qualified construction. It distinguishes this variant from commercial-grade versions (e.g., "E3" or "M3") and confirms compliance with automotive reliability standards, material restrictions, and assembly process requirements (e.g., MSL Level 1, 260 °C peak reflow). The "_A/H" denotes packaging: 7″ tape-and-reel, 850 units per reel.
How does SM15T36AHM3_A/H differ from bidirectional TVS diodes like SM15T36CA?
SM15T36AHM3_A/H is unidirectional and features polarity marking (cathode band); it conducts only during reverse overvoltage, making it ideal for DC-biased lines. In contrast, SM15T36CA is bidirectional, symmetrical, and unmarked - suited for AC or floating signal lines. Their VBR, VC, and PPPM ratings are identical, but circuit integration differs: SM15T36AHM3_A/H requires correct orientation relative to DC bias, while SM15T36CA does not.
What is the thermal resistance of SM15T36AHM3_A/H, and how does it affect PCB layout?
The SM15T36AHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. This value assumes minimum recommended pad layout per Vishay spec; reducing pad area increases thermal resistance and risks exceeding TJ max = +150 °C under repeated surges. Designers must allocate sufficient copper area and consider airflow or nearby heat sources when deploying SM15T36AHM3_A/H in high-duty-cycle applications.
SM15T36AHM3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- SM15T, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 30.8V
- Voltage - Breakdown (Min):
- 34.2V
- Voltage - Clamping (Max) @ Ipp:
- 49.9V
- Current - Peak Pulse (10/1000µs):
- 30A
- 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 (SMC)
SM15T36AHM3_A/H FAQ
1.How can I place an order for SM15T36AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T36AHM3_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 SM15T36AHM3_A/H reliable?
The price and inventory of SM15T36AHM3_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 SM15T36AHM3_A/H is usually 5 days.
3.What payment methods are accepted for SM15T36AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T36AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T36AHM3_A/H?
SM15T36AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T36AHM3_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 SM15T36AHM3_A/H?
For technical support, including SM15T36AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T36AHM3_A/H requirements.
6.How does Aetrix verify that SM15T36AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SM15T36AHM3_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 SM15T36AHM3_A/H meets industry standards.
7.What is the process for return or replacement of SM15T36AHM3_A/H?
All SM15T36AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SM15T36AHM3_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 SM15T36AHM3_A/H part is unused and in its original packaging.
Return procedure for SM15T36AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T36AHM3_A/H Tags
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