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Vishay General Semiconductor - Diodes Division SM6T36CAHM3_A/H
- Part No.:
- SM6T36CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T36CAHM3_A/H.pdf
- Description:
- TVS DIODE 30.8VWM 49.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,528
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Product details
Overview
SM6T36CAHM3_A/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, rated for 36 V standoff voltage (VWM), 49.9 V clamping voltage at 12 A peak pulse current, and 600 W peak pulse power with 10/1000 μs waveform. It provides robust ESD and surge protection for automotive sensor signal lines and industrial I/O interfaces.
For engineers reviewing the SM6T36CAHM3_A/H datasheet, SM6T36CAHM3_A/H pinout, SM6T36CAHM3_A/H application, or SM6T36CAHM3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, low clamping ratio, and SMB package compatibility with automated SMT assembly.
Technical Context
This device operates as a bidirectional voltage-clamping protector, leveraging avalanche breakdown across both polarities to limit transient overvoltages on data or power lines. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1 μA at 30.8 V), while the low-inductance SMB package supports fast response to sub-microsecond transients.
The SM6T36CAHM3_A/H is thermally rated for TJ = –65 °C to +150 °C and derates linearly above 25 °C ambient, with RθJA = 100 °C/W and RθJL = 20 °C/W. It meets J-STD-020 MSL Level 1 and is qualified to AEC-Q101 for automotive under-hood and body electronics applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30.8 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 34.2 V / 37.8 V - Breakdown occurs within this range at 1 mA test current, defining turn-on threshold |
| VC @ IPPM | 49.9 V at 12.0 A - Clamped voltage during 10/1000 μs surge, limiting downstream stress |
| PPPM | 600 W - Peak transient power handling capacity, critical for IEC 61000-4-5 Level 4 compliance |
| Package | SMB (DO-214AA) - Surface-mount outline with 5.59 mm × 4.06 mm footprint, optimized for high-density PCB layout |
| AEC-Q101 | Qualified - Validated for automotive reliability including temperature cycling, HTRB, and ESD testing per AEC standard |
| RoHS & Halogen-Free | Compliant - Meets EU RoHS Directive 2011/65/EU and halogen-free material requirements (IEC 61249-2-21) |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional device with no polarity marking; terminals are matte tin-plated and solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Anode) | Bidirectional terminal | Identical electrical role in both directions; no functional distinction - symmetric clamping path |
| Anode (Cathode) | Bidirectional terminal | Same as above; device functions identically regardless of voltage polarity applied across terminals |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Enables protection against severe transients such as ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 4 kV surge events |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes voltage overshoot during clamping, reducing stress on protected ICs like CAN transceivers or ADC front-ends |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive-grade reliability including 1000-cycle temperature cycling and 1000 h HTRB at 150 °C |
| Glass passivated junction | Ensures stable, repeatable breakdown characteristics and long-term parameter stability under thermal cycling |
| MSL Level 1, 260 °C peak reflow | Supports lead-free reflow soldering without preconditioning, compatible with standard SMT production lines |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog output lines of engine coolant temperature sensors exposed to load dump and inductive switching noise in 12 V vehicle systems. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between sensor output and microcontroller ADC input. Use Value: Limits transient excursions to ≤49.9 V, preventing ADC saturation and protecting internal ESD structures of automotive-grade MCUs. | Use Scenario: Shielding 24 V digital input channels in programmable logic controllers from field-wiring surges and relay contact bounce. IC Role / Device Role / Timing Role: Parallel-connected TVS on each input line, referenced to common ground. Use Value: Absorbs up to 600 W of surge energy without degradation, maintaining signal integrity during factory floor EMI events. |
| USB Port ESD Protection | DC Power Rail Surge Suppression |
Use Scenario: Secondary-level ESD protection on USB 2.0 D+/D– lines in infotainment head units, downstream of integrated port protectors. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp placed adjacent to connector. Use Value: Responds within <1 ns to ±8 kV HBM ESD events while adding <10 pF parasitic capacitance, preserving signal rise time. | Use Scenario: Safeguarding 36 V auxiliary power rails in telecom base station power supplies against lightning-induced surges. IC Role / Device Role / Timing Role: Standoff-rated TVS shunting rail-to-ground during overvoltage transients. Use Value: Maintains 30.8 V nominal operation while clamping 10/1000 μs surges to 49.9 V, allowing downstream DC-DC converters to remain functional. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36CA | Lower peak pulse power (400 W), same SMB package and 36 V VWM rating | Not AEC-Q101 qualified; intended for commercial-grade industrial use only | Select when cost sensitivity outweighs automotive qualification and 600 W surge margin is not required |
| SMCJ36CA | Higher peak pulse power (1500 W), larger SMC (DO-214AB) package, same VWM and clamping | Requires PCB area increase (~2.5× footprint); suited for higher-energy threat environments | Choose when system-level surge testing exceeds IEC 61000-4-5 4 kV and board space permits larger package |
Compared with SMAJ36CA and SMCJ36CA, the SM6T36CAHM3_A/H delivers AEC-Q101 qualification and 600 W surge capability in the smallest standardized SMB footprint, making it optimal for space-constrained automotive modules where reliability and compactness are jointly critical.
Availability
SM6T36CAHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, USB port hardening, and 36 V DC power rail protection requiring stable component supply and long-term lifecycle support.
Supply support for SM6T36CAHM3_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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SM6T Series is designed specifically for robust transient suppression in automotive, industrial, and communications equipment, combining high surge capability, AEC-Q101 qualification, and compact SMB packaging for modern SMT manufacturing.
FAQ
What does the "HM3" suffix indicate in SM6T36CAHM3_A/H?
The "HM3" suffix in SM6T36CAHM3_A/H denotes halogen-free, RoHS-compliant construction with full AEC-Q101 qualification. This distinguishes it from commercial-grade variants (e.g., "E3" or "M3") and confirms suitability for automotive under-hood and body electronics applications per industry reliability standards.
Is SM6T36CAHM3_A/H unidirectional or bidirectional?
SM6T36CAHM3_A/H is a bidirectional TVS diode, as confirmed by the "CA" suffix in its part number and its symmetric electrical characteristics in both polarities. It provides identical clamping behavior for positive and negative transients, eliminating need for polarity-aware placement on PCB.
What is the maximum clamping voltage of SM6T36CAHM3_A/H under surge conditions?
The maximum clamping voltage of SM6T36CAHM3_A/H is 49.9 V when subjected to a 10/1000 μs waveform at 12.0 A peak pulse current (IPPM), as specified in the Vishay SM6T datasheet revision 09-Jan-2024. This value defines the upper voltage limit imposed on protected circuitry during transient events.
Does SM6T36CAHM3_A/H require a heatsink for standard operation?
No, SM6T36CAHM3_A/H does not require an external heatsink for typical transient suppression duty cycles. Its 5.0 W steady-state power dissipation rating and RθJA of 100 °C/W are sufficient for intermittent surge absorption; thermal design focuses on PCB copper pad area (0.2" × 0.2") rather than added heatsinking.
How does SM6T36CAHM3_A/H compare to SM6T36A in terms of functionality?
SM6T36CAHM3_A/H is the bidirectional, AEC-Q101-qualified, halogen-free variant of the SM6T36A series. Unlike the unidirectional SM6T36A, the "CA" version clamps in both directions, and the "HM3" suffix adds automotive qualification and environmental compliance - making SM6T36CAHM3_A/H functionally distinct and application-specific.
SM6T36CAHM3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- SM6T, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 30.8V
- Voltage - Breakdown (Min):
- 34.2V
- Voltage - Clamping (Max) @ Ipp:
- 49.9V
- Current - Peak Pulse (10/1000µs):
- 12A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMB)
SM6T36CAHM3_A/H FAQ
1.How can I place an order for SM6T36CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T36CAHM3_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 SM6T36CAHM3_A/H reliable?
The price and inventory of SM6T36CAHM3_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 SM6T36CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for SM6T36CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T36CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T36CAHM3_A/H?
SM6T36CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T36CAHM3_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 SM6T36CAHM3_A/H?
For technical support, including SM6T36CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T36CAHM3_A/H requirements.
6.How does Aetrix verify that SM6T36CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SM6T36CAHM3_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 SM6T36CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of SM6T36CAHM3_A/H?
All SM6T36CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SM6T36CAHM3_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 SM6T36CAHM3_A/H part is unused and in its original packaging.
Return procedure for SM6T36CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T36CAHM3_A/H Tags
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