My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBJ17CAHE3/52
;;2.jpg)
- Part No.:
- SMBJ17CAHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ17CAHE3/52.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,755
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ17CAHE3/52 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 17 V standoff voltage (VWM), 18.9–20.9 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), and clamps transients to ≤27.6 V at 21.7 A IPPM - deployed on signal lines and power rails in industrial sensor interfaces and automotive ECUs.
For engineers reviewing the SMBJ17CAHE3/52 datasheet, SMBJ17CAHE3/52 pinout, SMBJ17CAHE3/52 application, or SMBJ17CAHE3/52 equivalent, this page delivers verified electrical specs, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), clamping behavior under surge, and real-world use context for ESD/lightning transient suppression in bidirectional signal paths.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR min/max (18.9–20.9 V), ID ≤1.0 µA at VWM, and VC = 27.6 V at IPPM = 21.7 A. Its glass-passivated junction ensures stable leakage and fast response (<1 ns), while MSL Level 1 rating supports lead-free reflow up to 260 °C.
The device meets ANSI/IEEE C62.35 surge standards and is AEC-Q101 qualified (HE3 suffix), enabling deployment in automotive powertrain and body control modules where repetitive transient immunity and long-term reliability are mandatory. Thermal resistance RθJL = 20 °C/W enables effective heat transfer to PCB copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 17 V - maximum continuous reverse voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 18.9–20.9 V at IT = 1 mA - precise voltage threshold where avalanche conduction initiates in either polarity. |
| VC (Clamping Voltage) | 27.6 V at IPPM = 21.7 A - peak voltage seen by protected circuit during 10/1000 µs surge; determines stress on downstream ICs. |
| PPPM (Peak Pulse Power) | 600 W - maximum transient energy absorbed without failure; validated per IEC 61000-4-5 waveform. |
| ID (Reverse Leakage) | ≤1.0 µA at VWM - negligible standby current; avoids signal distortion or battery drain in always-on circuits. |
| TJ max. | 150 °C - maximum junction temperature; supports operation in under-hood automotive environments. |
| RθJA | 100 °C/W - thermal resistance from junction to ambient on standard 0.2" × 0.2" copper pads; informs PCB thermal design. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, matte tin-plated leads, RoHS-compliant and AEC-Q101 qualified (HE3 suffix). Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); polarity-unmarked for bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode / Anode (symmetrical) | Bidirectional terminal pair | No polarity marking; terminals interchangeable - conducts identically in both directions during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Withstands high-energy surges common in automotive load-dump and industrial motor switching without degradation. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive applications including engine control units and ADAS sensor interfaces per stress-test requirements. |
| MSL Level 1, 260 °C peak reflow | Compatible with standard lead-free SMT assembly processes without moisture sensitivity concerns or baking requirements. |
| Glass-passivated junction | Ensures low leakage stability over temperature and lifetime, critical for precision analog and low-power IoT sensor nodes. |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes voltage overshoot during transients - protects 3.3 V and 5 V logic rails without overdesigning downstream TVS stages. |
Applications
| Automotive Sensor Interface | Industrial CAN Bus Protection |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver inputs against ISO 7637-2 pulse 1, 2a, and 5a transients in vehicle door modules and seat controllers. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential bus lines (CAN_H/CAN_L) to limit common-mode surges. Use Value: Maintains signal integrity under ±25 V transients while drawing <1 µA at 12 V nominal - no impact on bus biasing or timing. |
Use Scenario: Safeguarding RS-485/RS-422 transceivers in factory automation PLC I/O modules exposed to relay coil flyback and ESD. IC Role / Device Role / Timing Role: Low-capacitance (≈200 pF) bidirectional clamp on data lines to suppress >1 kV EFT bursts without signal edge degradation. Use Value: Clamps to 27.6 V within <1 ns, preserving data rate integrity up to 25 Mbps and eliminating need for additional series impedance. |
| Consumer Appliance Motor Control | Telecom Power Input Stage |
Use Scenario: Shielding microcontroller GPIOs and gate drivers from inductive kickback in washing machine pump inverters and HVAC blower circuits. IC Role / Device Role / Timing Role: Parallel-connected TVS across MOSFET source-drain or MCU input pins to shunt 600 W surge energy away from silicon. Use Value: Survives 100+ surge events at rated IPPM without parameter shift - extends field life beyond 10 years in cyclic appliance duty. |
Use Scenario: Front-end protection of 48 V DC telecom power supplies against lightning-induced surges per IEC 61000-4-5 Level 4 (4 kV). IC Role / Device Role / Timing Role: Primary-stage bidirectional clamp on input rail, coordinated with upstream MOV and fuse for staged energy absorption. Use Value: Limits let-through voltage to <28 V, preventing latch-up in DC-DC controllers and enabling single-stage protection architecture. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ17CA-M3/52 | Halogen-free, RoHS-compliant, commercial-grade (non-AEC-Q101) | Lacks automotive qualification; suitable for industrial/commercial equipment only | Select when AEC-Q101 is not required and halogen-free compliance is mandated. |
| SAC17CA | Same VWM/VBR/VC specs but in SOD-123FL package; lower PPPM (400 W), higher RθJA (150 °C/W) | Lower surge handling and thermal performance; limited to low-duty-cycle consumer applications | Choose only for space-constrained designs where 600 W capability and automotive qualification are not needed. |
Compared with SMBJ17CAHE3/52, the M3/52 variant offers identical electrical performance without AEC-Q101 validation, while SAC17CA trades surge robustness and thermal efficiency for smaller footprint - making SMBJ17CAHE3/52 the sole choice for automotive-grade, high-reliability bidirectional clamping.
Availability
SMBJ17CAHE3/52 is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface hardening, and telecom power input staging requiring stable component supply and full traceability.
Supply support for SMBJ17CAHE3/52 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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The SMBJ series delivers standardized, AEC-Q101-qualified TVS diodes optimized for board-level transient suppression in harsh environments - emphasizing repeatable clamping, low leakage, and robust surge endurance.
FAQ
What does the "CA" suffix indicate in SMBJ17CAHE3/52?
The "CA" suffix denotes a bidirectional configuration - meaning SMBJ17CAHE3/52 provides symmetrical transient suppression in both polarities, unlike unidirectional "A" variants. This enables direct placement across AC-coupled or differential signal lines without polarity concerns, and is essential for protecting CAN, RS-485, or audio interfaces where voltage reversals occur.
Is SMBJ17CAHE3/52 qualified for automotive applications?
Yes, SMBJ17CAHE3/52 carries the HE3 suffix, confirming it is RoHS-compliant and AEC-Q101 qualified. This certification covers stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing - validating its suitability for under-hood and chassis-mounted automotive systems per ISO/TS 16949 requirements.
What is the clamping voltage of SMBJ17CAHE3/52 at its rated surge current?
SMBJ17CAHE3/52 clamps to a maximum of 27.6 V at its peak pulse current (IPPM) of 21.7 A, measured using the standard 10/1000 µs waveform. This clamping voltage is guaranteed across temperature and lifetime, ensuring downstream ICs (e.g., 3.3 V or 5 V microcontrollers) remain within absolute maximum ratings during surge events.
How does SMBJ17CAHE3/52 differ from unidirectional SMBJ17AHE3/52?
SMBJ17CAHE3/52 is bidirectional with no cathode marking and identical VBR in both directions, while SMBJ17AHE3/52 is unidirectional with a cathode band and conducts only in reverse bias. The CA version supports AC signal line protection (e.g., Ethernet PHY pairs), whereas the A version suits DC power rail or GPIO protection where polarity is fixed and forward conduction must be blocked.
What PCB layout guidance applies to SMBJ17CAHE3/52 for optimal thermal and surge performance?
For SMBJ17CAHE3/52, Vishay specifies mounting on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve the rated RθJA of 100 °C/W and sustain 600 W pulse power. Avoid narrow traces between the device and ground/power planes; use thermal vias under pads if ambient temperatures exceed 85 °C to reduce junction temperature rise during repeated surges.
SMBJ17CAHE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 27.6V
- Current - Peak Pulse (10/1000µs):
- 21.7A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ17CAHE3/52 FAQ
1.How can I place an order for SMBJ17CAHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ17CAHE3/52 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 SMBJ17CAHE3/52 reliable?
The price and inventory of SMBJ17CAHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ17CAHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ17CAHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ17CAHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ17CAHE3/52?
SMBJ17CAHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ17CAHE3/52 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 SMBJ17CAHE3/52?
For technical support, including SMBJ17CAHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ17CAHE3/52 requirements.
6.How does Aetrix verify that SMBJ17CAHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ17CAHE3/52 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 SMBJ17CAHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ17CAHE3/52?
All SMBJ17CAHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ17CAHE3/52, 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 SMBJ17CAHE3/52 part is unused and in its original packaging.
Return procedure for SMBJ17CAHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ17CAHE3/52 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
