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Vishay General Semiconductor - Diodes Division SMCJ13CAHM3/I
- Part No.:
- SMCJ13CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ13CAHM3/I.pdf
- Description:
- TVS DIODE 13VWM 21.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,874
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Product details
Overview
SMCJ13CAHM3/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection on signal and power lines. It features a 13 V standoff voltage (VWM), 21.5 V clamping voltage (VC) at 69.8 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 μs waveform - used to protect automotive sensor interfaces, industrial I/O ports, and telecom line drivers against ESD and lightning-induced transients.
For engineers reviewing the SMCJ13CAHM3/I datasheet, SMCJ13CAHM3/I pinout, SMCJ13CAHM3/I application, or SMCJ13CAHM3/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance (HM3 suffix), thermal resistance (RθJA = 75 °C/W), and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ13CAHM3/I operates as a silicon avalanche diode with symmetrical breakdown in both polarities, enabling robust protection of AC-coupled or floating signal paths without polarity sensitivity. Its glass-passivated junction ensures stable VBR (14.4–15.9 V) and low incremental surge resistance, critical for maintaining low clamping voltage under fast-rising transients up to 10/1000 μs.
Designed for surface-mount use in high-reliability environments, it meets MSL level 1 per J-STD-020 (peak reflow 260 °C), supports 150 °C maximum junction temperature, and delivers consistent performance across -55 °C to +150 °C operating range - validated for automotive-grade applications via AEC-Q101 qualification (HM3 suffix).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 13 V - maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 12 V nominal systems. |
| VBR min/max | 14.4 V / 15.9 V - breakdown voltage range at 1 mA test current; ensures reliable turn-on within defined tolerance band. |
| VC @ IPPM | 21.5 V - clamped voltage at 69.8 A peak pulse current; determines maximum stress imposed on protected ICs during surge events. |
| PPPM | 1500 W - peak pulse power handling with 10/1000 μs waveform; enables suppression of high-energy transients like ISO 7637-2 Pulse 5a. |
| RθJA | 75 °C/W - junction-to-ambient thermal resistance on standard PCB pad layout; informs derating requirements above 25 °C ambient. |
| TJ max | +150 °C - maximum junction temperature; supports operation in under-hood automotive and industrial control cabinet environments. |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 0.320" x 0.246" footprint; compatible with JEDEC-compliant pick-and-place equipment. |
Pinout & Package
SMCJ13CAHM3/I uses the SMC (DO-214AB) package: a two-terminal, bidirectional device with no polarity marking. The case is molded in UL 94 V-0 rated compound; terminals are matte tin-plated and solderable per J-STD-002 and JESD 22-B102. Mounting requires 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal for rated power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge current entry point (positive polarity) | Accepts transient energy during positive half-cycle; connects to line being protected (e.g., CAN_H or RS-485 A). |
| Cathode | Surge current entry point (negative polarity) | Accepts transient energy during negative half-cycle; connects to same line (bidirectional symmetry enables single-device AC protection). |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC-coupled or floating differential lines (e.g., RS-485, CAN, USB D+/D−) without external polarity management. |
| AEC-Q101 qualified (HM3) | Validated for automotive electronics including engine control modules, ADAS sensors, and body control units requiring long-term reliability under thermal cycling. |
| Halogen-free & RoHS-compliant | Meets environmental compliance mandates for industrial and consumer products sold in EU, China, and North America without compromising surge performance. |
| Low clamping ratio (VC/VWM = 1.65) | Minimizes overvoltage stress on downstream components - critical for protecting 3.3 V or 5 V logic interfaces connected to 12 V bus lines. |
| MSL Level 1 rating | Supports standard SMT reflow profiles up to 260 °C peak without moisture-related damage, eliminating bake-out requirements pre-assembly. |
Applications
| Automotive Sensor Interface | Industrial RS-485 Network |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine bay environments exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS clamp absorbing ±100 V transients while preserving signal integrity of 0–5 V ratiometric outputs. Use Value: Prevents latch-up or gate oxide damage in ADC front-end op-amps by limiting transient voltage to ≤21.5 V at 69.8 A. | Use Scenario: Shielding RS-485 transceivers (e.g., SN65HVD230) in factory automation PLCs from EFT bursts and cable discharge events. IC Role / Device Role / Timing Role: Line-side surge suppressor placed directly at connector, shunting transients before they reach transceiver pins. Use Value: Maintains data integrity during 4 kV EFT testing by clamping common-mode surges below transceiver absolute maximum ratings. |
| Telecom Line Driver Protection | Consumer USB Port ESD Guard |
Use Scenario: Safeguarding xDSL line drivers against lightning-induced surges entering via outdoor copper pairs in DSLAM equipment. IC Role / Device Role / Timing Role: Primary-level protector on tip/ring lines, coordinated with secondary GDT or polymer PTC devices. Use Value: Handles 1500 W peak pulse energy (10/1000 μs) without degradation, extending system MTBF in field-deployed telecom infrastructure. | Use Scenario: Adding robustness to USB 2.0 upstream ports on smart TVs and set-top boxes against human-body-model (HBM) ESD events. IC Role / Device Role / Timing Role: Fast-response TVS placed between USB D+ and D− lines and ground, suppressing ±15 kV contact discharge. Use Value: Achieves <1 ns response time and <21.5 V clamping to prevent USB PHY reset or enumeration failure during plug/unplug cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC13CA | Lower PPPM (600 W), smaller SMA package, higher RθJA (125 °C/W) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a or lightning surge standards. | Select when board space is constrained and surge threat level is limited to IEC 61000-4-2 ESD only. |
| SMCJ13AHE3/I | Unidirectional version, same VWM/VC/PPPM, commercial-grade (non-AEC-Q101), RoHS-compliant but not halogen-free | Requires external polarity awareness; not qualified for automotive under-hood use. | Choose for cost-sensitive industrial control applications where bidirectionality is unnecessary and AEC-Q101 is not mandated. |
Compared with SAC13CA and SMCJ13AHE3/I, the SMCJ13CAHM3/I uniquely combines AEC-Q101 qualification, halogen-free construction, and full 1500 W bidirectional surge capability - making it the only option among the three suitable for automotive-grade differential bus protection with zero layout compromise.
Availability
SMCJ13CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial RS-485 networks, and telecom line driver protection requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for SMCJ13CAHM3/I 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 SMCJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where failure modes must be mitigated without adding complexity.
FAQ
What does the "CA" suffix indicate in SMCJ13CAHM3/I?
The "CA" suffix in SMCJ13CAHM3/I denotes a bidirectional configuration - meaning the device provides symmetrical transient voltage suppression for both positive and negative polarity surges. This eliminates the need for polarity-aware layout and makes it ideal for protecting AC-coupled or differential signal lines such as CAN, RS-485, or telecom interfaces. Unlike unidirectional variants (e.g., SMCJ13A), the SMCJ13CAHM3/I has no cathode marking and functions identically in either orientation.
How does the HM3 suffix differ from E3 or M3 in SMCJ13CAHM3/I?
Within the SMCJ13CAHM3/I designation, "HM3" specifies halogen-free, RoHS-compliant construction with AEC-Q101 qualification - distinguishing it from E3 (RoHS-compliant commercial grade), M3 (halogen-free RoHS commercial grade), and HE3 (AEC-Q101 with RoHS but not halogen-free). The HM3 suffix confirms suitability for automotive under-hood applications where both environmental compliance and long-term reliability under thermal cycling are mandatory.
What is the maximum clamping voltage of SMCJ13CAHM3/I and at what current is it specified?
The maximum clamping voltage (VC) of SMCJ13CAHM3/I is 21.5 V, measured at its rated peak pulse current (IPPM) of 69.8 A using the standardized 10/1000 μs double-exponential waveform. This value represents the upper limit of voltage imposed on protected circuitry during worst-case surge events and is critical for ensuring downstream components (e.g., transceivers or microcontrollers) remain within their absolute maximum voltage ratings.
Can SMCJ13CAHM3/I be used in place of a unidirectional TVS like SMCJ13AHE3/I?
SMCJ13CAHM3/I can replace SMCJ13AHE3/I only if bidirectional protection is required and polarity isolation is not needed - for example, on differential buses or floating lines. However, it cannot substitute in circuits relying on DC blocking or forward conduction (e.g., power rail clamping), since its symmetrical structure lacks a defined anode/cathode function. Always verify signal path topology and transient polarity assumptions before substitution.
What PCB layout guidance applies to SMCJ13CAHM3/I for optimal thermal and electrical performance?
For optimal performance, SMCJ13CAHM3/I must be mounted on minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, as specified in the Vishay datasheet. These pads ensure adequate heat dissipation to maintain RθJA = 75 °C/W and sustain rated PPPM. Avoid narrow traces between the device and protected line; keep stub lengths short (<2 mm) to minimize inductance that could elevate clamping voltage during fast transients.
SMCJ13CAHM3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 13V
- Voltage - Breakdown (Min):
- 14.4V
- Voltage - Clamping (Max) @ Ipp:
- 21.5V
- Current - Peak Pulse (10/1000µs):
- 69.8A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ13CAHM3/I FAQ
1.How can I place an order for SMCJ13CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ13CAHM3/I 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 SMCJ13CAHM3/I reliable?
The price and inventory of SMCJ13CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ13CAHM3/I is usually 5 days.
3.What payment methods are accepted for SMCJ13CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ13CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ13CAHM3/I?
SMCJ13CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ13CAHM3/I 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 SMCJ13CAHM3/I?
For technical support, including SMCJ13CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ13CAHM3/I requirements.
6.How does Aetrix verify that SMCJ13CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SMCJ13CAHM3/I 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 SMCJ13CAHM3/I meets industry standards.
7.What is the process for return or replacement of SMCJ13CAHM3/I?
All SMCJ13CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ13CAHM3/I, 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 SMCJ13CAHM3/I part is unused and in its original packaging.
Return procedure for SMCJ13CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ13CAHM3/I Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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