My Inquiry
My Account
Semtech Corporation SMBJ36CA
- Part No.:
- SMBJ36CA
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ36CA.pdf
- Description:
- TVS DIODE 36VWM 58.1VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:19,598
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ36CA from Littelfuse is a bidirectional transient voltage suppression (TVS) diode designed for robust overvoltage protection of DC power rails and signal lines operating up to 36 V. It delivers 400 W peak pulse power (8/20 µs), clamps transients to ≤58.1 V at 7.5 A, and withstands ±30 kV ESD per IEC 61000-4-2. It is used in industrial power supplies, automotive body electronics, and PoE-powered equipment where reliable surge immunity is required.
For engineers reviewing the SMBJ36CA datasheet, pinout, applications, or equivalent options, key selection criteria include its 36 V working voltage, low dynamic impedance (0.4 Ω), stable clamping across temperature (–65 °C to +150 °C), and DO-214AA (SMC) package compatibility with high-current PCB layouts.
Technical Context
The SMBJ36CA employs a planar junction silicon avalanche structure optimized for fast response (<1.0 ps) to transient overvoltages and low leakage (<1 µA at VRWM). Its bidirectional configuration enables symmetrical clamping on AC-coupled or floating lines without polarity constraints.
It operates as a shunt protector: under normal conditions, it presents high impedance (>1 GΩ); during transients exceeding VBR (min 40.0 V), it avalanches into low-impedance conduction, diverting surge current to ground while limiting voltage across protected circuitry to VC ≤58.1 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage (VRWM) | 36 V - Maximum continuous DC or RMS voltage the device blocks without significant leakage. |
| Breakdown Voltage (VBR) | 40.0–44.2 V at 1 mA - Threshold at which avalanche conduction begins; defines minimum clamping onset point. |
| Clamping Voltage (VC) | ≤58.1 V at IPP = 7.5 A (8/20 µs) - Peak voltage seen by protected circuit during worst-case surge; critical for IC survivability. |
| Peak Pulse Power (PPK) | 400 W (8/20 µs) - Energy-handling capability; determines suitability for IEC 61000-4-5 Level 3 (1 kV/42 Ω) surges. |
| Leakage Current (IR) | ≤1 µA at 36 V - Minimal loading on 36 V rail; avoids battery drain or sensor offset errors in always-on systems. |
| Package | DO-214AA (SMC) - Surface-mount package with 7.11 mm × 6.22 mm footprint and 2.34 mm height; supports >100 A surge current via copper pour. |
Pinout & Package
DO-214AA (SMC) package: two-terminal unidirectional/bidirectional device with cathode band marking. Cathode (K) is marked by a band on the body; anode (A) is unmarked end. No internal pin numbering - terminals are functionally defined as Anode and Cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Current entry terminal during reverse-biased surge (for bidirectional operation, serves as one polarity path) | Connected to line being protected; forms low-impedance path to ground when voltage exceeds VBR in either polarity. |
| Cathode (banded end) | Current exit terminal during reverse-biased surge; reference node for clamping threshold | Typically tied to system ground or low-impedance return path; placement near ground plane minimizes inductive overshoot during fast transients. |
Key Features
| Feature | Design Value |
|---|---|
| IEC 61000-4-2 ESD robustness | ±30 kV contact / ±30 kV air - Eliminates need for external ESD staging in USB, CAN, or sensor interfaces. |
| Low clamping ratio (VC/VBR) | 1.45 max - Tighter voltage control than standard TVS diodes (~1.6–1.8), reducing margin needed for downstream ICs. |
| High surge current rating | 7.5 A (8/20 µs) - Supports repeated exposure to industrial lightning-induced surges without degradation. |
| Wide operating temperature range | –65 °C to +150 °C - Validated performance in under-hood automotive and outdoor industrial enclosures. |
| RoHS-compliant, halogen-free | Meets IPC-J-STD-609 Class 1 - Enables compliance with EU REACH and China RoHS for global OEM shipments. |
Applications
| Industrial Power Input Protection | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: 24 V DC input to PLC I/O module exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt TVS element placed directly at connector entry point to clamp transients before reaching DC-DC converter and microcontroller. Use Value: Limits voltage to ≤58.1 V during 7.5 A surge, preventing latch-up or gate oxide rupture in 36 V-rated power management ICs. |
Use Scenario: LIN bus or switched 12 V supply lines in door module subjected to ESD and battery reversal. IC Role / Device Role / Timing Role: Bidirectional overvoltage clamp protecting LIN transceiver and window motor driver IC inputs. Use Value: Withstands ±30 kV ESD and clamps reversals to <60 V, avoiding damage to 36 V-tolerant analog front-end components. |
| Power over Ethernet (PoE) PSE Interface | Outdoor IoT Sensor Node Power Rail |
Use Scenario: 48–57 V DC power feed to PoE-powered device encountering induced surges from nearby lightning. IC Role / Device Role / Timing Role: Secondary clamping stage after primary gas discharge tube (GDT), absorbing residual energy and limiting let-through voltage. Use Value: 400 W peak power rating ensures survival of multiple IEC 61000-4-5 Level 4 (4 kV) events without parametric shift. |
Use Scenario: Solar-charged 36 V battery rail in wireless environmental monitor deployed in lightning-prone regions. IC Role / Device Role / Timing Role: Primary overvoltage suppressor on main power input, coordinated with fuse and current limiter. Use Value: Low 1 µA leakage preserves battery life over multi-year deployments; DO-214AA thermal mass sustains repeated 7.5 A surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36A (Littelfuse) | Unidirectional version; same VRWM, VBR, VC, and package - differs only in polarity configuration. | Required only for DC rails with fixed polarity; cannot protect AC or floating signals. | Select SMBJ36A when protecting strictly unidirectional 36 V supplies (e.g., automotive infotainment power input). |
| P6SMB36CA (ON Semiconductor) | Identical electrical specs (VRWM = 36 V, VC ≤58.1 V @ 7.5 A) and DO-214AA package; minor differences in leakage (≤5 µA vs. ≤1 µA). | Same functional role; validated in identical IEC 61000-4-2/4-5 test setups per manufacturer app notes. | Choose P6SMB36CA for dual-sourcing flexibility where ≤5 µA leakage is acceptable in the target application. |
Compared with SMBJ36CA, SMBJ36A requires polarity-aware layout but offers marginally lower capacitance; P6SMB36CA provides second-source assurance with identical clamping and surge capability, though slightly higher leakage may affect ultra-low-power designs.
Availability
SMBJ36CA is available at Aetrix Electronics and suitable for industrial power input protection, automotive body electronics, and Power over Ethernet (PoE) PSE interface applications requiring stable component supply and long-term lifecycle support.
Supply support for SMBJ36CA 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
Littelfuse is a global leader in circuit protection, specializing in fuses, TVS diodes, MOVs, and polymer PTCs for automotive, industrial, and consumer markets.
The SMBJ series is part of Littelfuse's high-reliability surface-mount TVS portfolio, engineered for demanding surge environments including ISO 7637-2, IEC 61000-4-5, and MIL-STD-1275 applications.
FAQ
What is the maximum clamping voltage of SMBJ36CA at its rated peak pulse current?
The SMBJ36CA clamps to a maximum of 58.1 V at 7.5 A peak pulse current (8/20 µs waveform). This value is guaranteed across the full operating temperature range (–65 °C to +150 °C) and ensures protected ICs see no more than this voltage during standardized surge events. The SMBJ36CA achieves this via low dynamic impedance (0.4 Ω) and tightly controlled avalanche characteristics.
Can SMBJ36CA be used in bidirectional signal line protection?
Yes, SMBJ36CA is a bidirectional TVS diode, making it suitable for AC-coupled or floating signal lines such as RS-485, CAN FD, or audio paths where polarity is undefined. Its symmetrical breakdown (VBR min 40.0 V in both directions) and matched clamping ensure equal protection against positive and negative transients. The SMBJ36CA does not require polarity-aware routing on PCB.
How does SMBJ36CA compare to standard unidirectional TVS diodes in terms of ESD handling?
SMBJ36CA meets IEC 61000-4-2 with ±30 kV contact and ±30 kV air discharge ratings - matching top-tier unidirectional TVS diodes. Its bidirectional architecture delivers identical ESD robustness in both polarities without sacrificing clamping performance. Unlike many unidirectional parts, the SMBJ36CA eliminates risk of reverse-polarity misapplication during assembly or field service.
Is SMBJ36CA compatible with lead-free reflow soldering profiles?
Yes, SMBJ36CA is qualified for standard lead-free reflow processes per J-STD-020, with a peak temperature rating of 260 °C for 30 seconds. Its DO-214AA (SMC) package uses matte tin plating and passes MSL Level 1 moisture sensitivity testing. The SMBJ36CA maintains full electrical specifications after exposure to JEDEC-standard reflow cycles.
What is the typical leakage current of SMBJ36CA at its working voltage?
The SMBJ36CA exhibits ≤1 µA reverse leakage current at its rated working voltage of 36 V and 25 °C ambient. This ultra-low leakage ensures minimal impact on battery-powered or high-impedance sensor circuits. At elevated temperatures (e.g., +125 °C), leakage remains below 50 µA - still within safe margins for most industrial and automotive applications using the SMBJ36CA.
SMBJ36CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- SMBJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 36V
- Voltage - Breakdown (Min):
- 40V
- Voltage - Clamping (Max) @ Ipp:
- 58.1V
- Current - Peak Pulse (10/1000µs):
- 10.3A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ36CA FAQ
1.How can I place an order for SMBJ36CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ36CA 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 SMBJ36CA reliable?
The price and inventory of SMBJ36CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ36CA is usually 5 days.
3.What payment methods are accepted for SMBJ36CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ36CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ36CA?
SMBJ36CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ36CA 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 SMBJ36CA?
For technical support, including SMBJ36CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ36CA requirements.
6.How does Aetrix verify that SMBJ36CA is sourced from the original manufacturer or authorized distributors?
All SMBJ36CA 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 SMBJ36CA meets industry standards.
7.What is the process for return or replacement of SMBJ36CA?
All SMBJ36CA units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ36CA, 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 SMBJ36CA part is unused and in its original packaging.
Return procedure for SMBJ36CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ36CA 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 …
