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Vishay General Semiconductor - Diodes Division SM15T27CAHE3/57T
- Part No.:
- SM15T27CAHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T27CAHE3/57T.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,170
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Product details
Overview
SM15T27CAHE3/57T from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 23.1 V stand-off voltage (VWM), 25.7–28.4 V breakdown voltage (VBR), and 37.5 V clamping voltage (VC) at 40.0 A IPPM. It protects automotive-grade sensor signal lines against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T27CAHE3/57T datasheet, SM15T27CAHE3/57T pinout, SM15T27CAHE3/57T application, or SM15T27CAHE3/57T equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 1500 W surge rating, low clamping ratio (VC/VBR ≈ 1.39), and compatibility with high-reliability automotive I/O protection layouts.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering consistent clamping performance regardless of transient polarity. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and robust ESD immunity up to ±30 kV (HBM), while the low-inductance SMC package minimizes voltage overshoot during fast-rising transients.
The device is thermally rated for TJ = –65 °C to +150 °C and derates linearly above TA = 25 °C, with RθJA = 75 °C/W and RθJL = 15 °C/W. Its failure mode under overstress is a short circuit - a predictable, system-safe behavior critical for automotive fault containment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 23.1 V - Maximum continuous reverse operating voltage before significant leakage; sets safe working margin below system rail. |
| VBR (min/max) | 25.7 V / 28.4 V - Verified breakdown threshold at 1.0 mA test current; defines reliable turn-on window for transient suppression. |
| VC @ IPPM | 37.5 V at 40.0 A - Clamped voltage during 10/1000 μs surge; limits stress on downstream ICs like CAN transceivers or ADC inputs. |
| PPPM | 1500 W - Peak pulse power handling per JEDEC standard waveform; suitable for lightning surge (IEC 61000-4-5 Level 3). |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments without thermal derating loss. |
| AEC-Q101 | Qualified - Validated for automotive reliability including HTOL, TC, and ESD testing; supports PPAP documentation for Tier-1 suppliers. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Meets UL 94 V-0 flammability rating and J-STD-020 MSL level 1 (peak reflow 260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Terminal 1 (cathode-band side not marked) | Bidirectional symmetry means no polarity marking; either terminal serves as anode or cathode depending on transient polarity. |
| Cathode | Terminal 2 (opposite end) | Same physical terminal as Anode due to bidirectional construction; terminals are functionally interchangeable under reverse/forward bias. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables single-device protection against IEC 61000-4-5 10/700 μs line surges up to 1 kV when combined with series impedance. |
| Glass-passivated junction | Ensures stable VBR over lifetime and temperature; eliminates parameter drift in harsh automotive thermal cycling. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive use including 1000-cycle temperature cycling and 1000 h HTOL; supports ASIL-B system integration. |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage exposure to protected ICs - critical for 24 V automotive microcontrollers with 36 V absolute max ratings. |
| MSL Level 1, 260 °C peak reflow | Eliminates moisture sensitivity concerns; allows standard SMT assembly without baking or special handling. |
Applications
| Automotive Sensor Signal Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting analog outputs of pressure/temperature sensors in engine control modules exposed to load-dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point to shunt transients before reaching signal conditioning op-amps. Use Value: Maintains signal integrity under 100 V/μs transients while surviving >1000 cycles of -40 °C to +125 °C thermal stress. |
Use Scenario: Safeguarding CAN_H/CAN_L lines in vehicle body control units against ESD and inductive switching noise from solenoid drivers. IC Role / Device Role / Timing Role: Low-capacitance (≈100 pF) bidirectional TVS placed differential across bus pair to suppress common-mode surges without distorting 1 Mbps data edges. Use Value: Prevents bus lockup during ISO 10605 ±8 kV contact discharge events while maintaining <1 ns response time. |
| Telecom Power Input Stage | Consumer Appliance Motor Drive Feedback |
Use Scenario: Guarding 24 V DC input rails of PoE-powered network switches against lightning-induced surges entering via Ethernet magnetics. IC Role / Device Role / Timing Role: Primary-level TVS mounted upstream of DC/DC converter input, coordinated with MOV and fuse for staged protection. Use Value: Absorbs 1500 W surges without degradation, enabling compliance with IEC 61000-4-5 Level 3 (2 kV line-earth). |
Use Scenario: Shielding hall-effect rotor position feedback lines in BLDC motor controllers from commutation spikes generated by 3-phase inverter switching. IC Role / Device Role / Timing Role: Localized TVS at motor connector interface, minimizing trace inductance to achieve sub-100 ps response to 500 V/μs transients. Use Value: Reduces false-trigger rate in position decoding ICs by limiting transient overvoltage to ≤37.5 V during 40 A surge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24CA | Lower PPPM (400 W), higher VWM (24 V), same SMC package but non-AEC-Q101 rated. | Limited to commercial-grade industrial controls; insufficient for automotive load-dump immunity. | Select only for cost-sensitive non-automotive designs where 400 W surge margin is acceptable. |
| SMCJ24CAHE3/57T | Higher PPPM (3000 W), identical VWM/VBR/VC specs, same AEC-Q101 qualification and HE3 suffix. | Over-spec'd for most 24 V systems; adds unnecessary board area and cost unless 3 kV IEC 61000-4-5 compliance is required. | Prefer SM15T27CAHE3/57T when 1500 W meets design margin - lower capacitance and tighter VBR tolerance improve signal fidelity. |
Compared with SMAJ24CA and SMCJ24CAHE3/57T, the SM15T27CAHE3/57T delivers optimal balance of AEC-Q101 compliance, 1500 W surge capacity, and tight 25.7–28.4 V VBR range - making it the preferred choice for space-constrained automotive sensor nodes requiring validated reliability without over-engineering.
Availability
SM15T27CAHE3/57T is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, and telecom power input stages requiring stable component supply, long-term lifecycle support, and AEC-Q101 traceability.
Supply support for SM15T27CAHE3/57T 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, precision, and automotive-grade validation.
The SM15T Series was engineered specifically for high-energy transient suppression in automotive and industrial environments, combining AEC-Q101 qualification, 1500 W surge capability, and SMC package robustness for under-hood and factory-floor deployment.
FAQ
What does the "CA" suffix indicate in SM15T27CAHE3/57T?
The "CA" suffix in SM15T27CAHE3/57T denotes a bidirectional configuration - meaning the device provides symmetrical clamping for both positive and negative transients without polarity dependence. This differs from unidirectional variants (e.g., SM15T27A) that require correct anode/cathode orientation and only clamp in reverse bias. The CA version is ideal for differential or AC-coupled signal lines like CAN or RS-485.
Is SM15T27CAHE3/57T suitable for protecting a 24 V automotive CAN bus?
Yes, SM15T27CAHE3/57T is well-suited for 24 V automotive CAN bus protection. Its 23.1 V VWM provides adequate margin above nominal 24 V rail (including load-dump peaks), while its 37.5 V clamping voltage stays safely below the 40 V absolute maximum rating of most CAN transceivers. The AEC-Q101 qualification and bidirectional operation ensure robustness against both ESD and inductive transients on CAN_H/CAN_L lines.
How does the HE3 suffix affect SM15T27CAHE3/57T's qualification status?
The HE3 suffix in SM15T27CAHE3/57T explicitly indicates RoHS-compliant construction and full AEC-Q101 qualification - covering stress tests including high-temperature operating life (HTOL), temperature cycling, and ESD (HBM ≥ 8 kV). This distinguishes it from commercial-grade E3-suffix parts and confirms suitability for automotive production applications requiring PPAP documentation and zero-defect reliability.
What is the clamping voltage of SM15T27CAHE3/57T at its rated peak pulse current?
The clamping voltage (VC) of SM15T27CAHE3/57T is 37.5 V when subjected to its rated peak pulse current (IPPM) of 40.0 A under the standard 10/1000 μs waveform. This value is measured across the device terminals during surge conduction and represents the maximum voltage imposed on protected circuitry - a critical parameter for ensuring downstream ICs remain within their absolute maximum ratings.
Can SM15T27CAHE3/57T replace SM15T24CAHE3/57T in an existing design?
SM15T27CAHE3/57T can replace SM15T24CAHE3/57T if the system's stand-off voltage margin allows a 3 V increase (from 20.5 V to 23.1 V VWM). Both share identical package, AEC-Q101 qualification, and clamping behavior. However, verify that the higher VWM does not reduce noise immunity margin in low-voltage sensing circuits - especially where transients may dip near the new VWM threshold.
SM15T27CAHE3/57T 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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 23.1V
- Voltage - Breakdown (Min):
- 25.7V
- Voltage - Clamping (Max) @ Ipp:
- 37.5V
- Current - Peak Pulse (10/1000µs):
- 40A
- 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)
SM15T27CAHE3/57T FAQ
1.How can I place an order for SM15T27CAHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T27CAHE3/57T 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 SM15T27CAHE3/57T reliable?
The price and inventory of SM15T27CAHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T27CAHE3/57T is usually 5 days.
3.What payment methods are accepted for SM15T27CAHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T27CAHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T27CAHE3/57T?
SM15T27CAHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T27CAHE3/57T 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 SM15T27CAHE3/57T?
For technical support, including SM15T27CAHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T27CAHE3/57T requirements.
6.How does Aetrix verify that SM15T27CAHE3/57T is sourced from the original manufacturer or authorized distributors?
All SM15T27CAHE3/57T 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 SM15T27CAHE3/57T meets industry standards.
7.What is the process for return or replacement of SM15T27CAHE3/57T?
All SM15T27CAHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SM15T27CAHE3/57T, 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 SM15T27CAHE3/57T part is unused and in its original packaging.
Return procedure for SM15T27CAHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T27CAHE3/57T Tags
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