My Inquiry
My Account
Taiwan Semiconductor Corporation S12KCHR7G
- Part No.:
- S12KCHR7G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
S12KCHR7G.pdf
- Description:
- DIODE GEN PURP 800V 12A DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,719
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
S12KCHR7G from Taiwan Semiconductor is a 12A, 800V surface-mount glass-passivated silicon rectifier diode in DO-214AB (SMC) package, featuring low forward voltage drop (≤1.1 V at 12 A), high surge capability (300 A IFSM), and junction temperature rating up to +150°C - deployed in AC/DC front-end stages of industrial SMPS and LED drivers.
For engineers reviewing the S12KCHR7G datasheet, S12KCHR7G pinout, S12KCHR7G application, or S12KCHR7G equivalent, key selection criteria include verified 800 V repetitive peak reverse voltage (VRRM), thermal resistance (RθJL = 9°C/W), moisture sensitivity level 1 compliance, and RoHS/halogen-free status per IEC 61249-2-21.
Technical Context
This single-die standard recovery rectifier operates with a typical junction capacitance of 78 pF at 1 MHz and 4.0 V reverse bias, enabling stable performance in high-frequency switching converters. Its glass-passivated junction ensures robust reliability under thermal cycling and humidity exposure.
The device supports automated placement and reflow soldering per J-STD-002, with matte tin-plated leads and UL 94V-0 molding compound. Polarity is marked by a cathode band, and it meets JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 800 V - maximum non-repetitive reverse voltage the diode blocks without breakdown in normal operation |
| IF | 12 A - continuous average forward current rating at case temperature ≤ 75°C |
| IFSM | 300 A - peak surge current tolerance for 8.3 ms half-sine wave, critical for inrush handling |
| VF | ≤1.1 V @ 12 A, 25°C - low conduction loss enabling higher efficiency in 100–500 kHz SMPS designs |
| RθJL | 9 °C/W - low junction-to-lead thermal resistance supports direct heatsinking via PCB copper pour |
| IR | ≤1 µA @ 25°C, ≤250 µA @ 125°C - minimal leakage ensures stable DC bus hold-up in offline converters |
| CJ | 78 pF @ 1 MHz, 4 V - predictable switching behavior with controlled reverse recovery tail in hard-switched topologies |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, single-anode/single-cathode configuration. Cathode indicated by molded band on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Forward current entry point | Connected to AC input or transformer secondary; requires adequate trace width for 12 A RMS |
| Cathode (Lead 2) | Forward current exit / DC output node | Connects to bulk capacitor positive rail; serves as reference for snubber and clamp circuits |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enhances long-term stability against humidity and thermal stress, validated per J-STD-020 Level 1 MSL |
| Low VF (≤1.1 V) | Reduces conduction losses by ~15% vs. comparable 12 A rectifiers, improving full-load efficiency in 200–300 W adapters |
| High IFSM (300 A) | Withstands repeated cold-start surges in universal-input SMPS without degradation |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing |
| UL 94V-0 molding | Ensures flame-retardant enclosure integrity during fault conditions in enclosed power supplies |
Applications
| Industrial SMPS Front-End | LED Driver Secondary Rectification |
|---|---|
Use Scenario: AC/DC conversion stage in 300–500 W industrial power supplies with universal input (85–265 VAC). IC Role / Device Role / Timing Role: Primary rectifier converting bridge output to DC bus; operates in continuous conduction mode at 50–60 kHz. Use Value: 800 V VRRM provides 2× safety margin over 400 VDC bus peaks, while 9°C/W RθJL enables compact heatsinkless layout. | Use Scenario: Output rectification in isolated flyback LED drivers for street lighting (36–72 VDC output, 1.5–3 A). IC Role / Device Role / Timing Role: Secondary-side freewheeling diode conducting during MOSFET off-time; handles pulsed 12 A peak currents. Use Value: Low VF minimizes heat generation in sealed luminaires; DO-214AB footprint allows dense PCB assembly with automated pick-and-place. |
| AC Adapter Input Stage | DC-DC Converter Input Rectification |
Use Scenario: Input rectification in 65–120 W laptop adapters with active PFC front-end. IC Role / Device Role / Timing Role: Post-PFC boost output rectifier; conducts during high-voltage DC link (≥380 VDC) conduction intervals. Use Value: 300 A IFSM withstands transient overloads during PFC controller startup; moisture level 1 rating ensures reliability in humid coastal environments. | Use Scenario: Input rectification in 48 V–12 V isolated forward or half-bridge DC-DC modules for telecom equipment. IC Role / Device Role / Timing Role: Primary-side rectifier in secondary-winding synchronous rectification auxiliary supply. Use Value: 78 pF junction capacitance limits EMI generation during fast voltage transitions; UL 94V-0 package prevents flame propagation in rack-mounted systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1208D | 12 A, 800 V, TO-220AC package; VF = 1.15 V typ., RθJA = 30°C/W | Requires through-hole mounting and external heatsink; unsuitable for high-density SMT layouts | Select when board space permits discrete heatsinking and leaded assembly is preferred |
| VS-12EWH08-M3 | 12 A, 800 V, DO-214AB; VF = 1.05 V max, IFSM = 250 A, RθJL = 10°C/W | Lower surge rating reduces margin in high-inrush applications; identical footprint enables drop-in replacement | Choose where lower VF is prioritized and surge events are infrequent or clamped externally |
Compared with STTH1208D and VS-12EWH08-M3, the S12KCHR7G delivers superior thermal performance (RθJL = 9°C/W) and higher surge robustness (300 A) in the same DO-214AB footprint, making it optimal for space-constrained, high-reliability industrial converters.
Availability
S12KCHR7G is available at Aetrix Electronics and suitable for industrial SMPS, LED driver secondary stages, and AC adapter input rectification requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.
Supply support for S12KCHR7G 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in power rectifiers, TVS diodes, and MOSFETs since 1979.
The S12GC–S12MC family was designed specifically for high-efficiency, high-reliability AC/DC and DC/DC power conversion in industrial, lighting, and consumer power supplies - emphasizing rugged packaging, low-loss conduction, and automated manufacturability.
FAQ
What is the maximum junction temperature rating for S12KCHR7G?
The S12KCHR7G has a maximum junction temperature (TJ) rating of +150°C, verified per absolute maximum ratings table. This allows reliable operation in high-ambient environments such as enclosed LED drivers or industrial enclosures. Derating curves confirm usable current capacity down to 75°C case temperature at full 12 A rating. Thermal design must maintain TJ ≤ 150°C using PCB copper area or optional heatsinking.
Does S12KCHR7G meet RoHS and halogen-free requirements?
Yes, the S12KCHR7G is RoHS compliant per EU Directive 2011/65/EU and halogen-free per IEC 61249-2-21. The molding compound contains no brominated flame retardants, and terminals use matte tin plating without lead or antimony. Full compliance documentation is available upon request from Taiwan Semiconductor's official product change notices.
What is the marking code for S12KCHR7G on the device body?
The S12KCHR7G is marked on the device body as "S12KC", followed by date code and factory identifier per TSC's standard DO-214AB marking diagram. The "K" denotes 800 V VRRM, and "C" indicates green compound. No "R7G" suffix appears on the physical marking - that portion identifies tape-and-reel packaging per ordering code conventions.
Can S12KCHR7G replace S12JCHR7G in an existing design?
Yes, the S12KCHR7G can directly replace S12JCHR7G (600 V VRRM) where higher reverse voltage margin is needed, provided layout accommodates identical DO-214AB footprint and thermal design accounts for slightly higher VF (1.1 V vs. 1.05 V typ.). No PCB changes are required, but verify system-level voltage transients do not exceed 800 V peak in revised operating conditions.
What is the moisture sensitivity level (MSL) for S12KCHR7G?
The S12KCHR7G has a moisture sensitivity level (MSL) of Level 1 per J-STD-020, meaning it may be stored indefinitely at ≤30°C/60% RH without baking prior to reflow. This eliminates pre-bake steps in standard SMT lines and supports extended floor life - a key advantage over MSL 2a or 3 devices in high-volume manufacturing.
S12KCHR7G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-214AB, SMC
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 800 V
- Current - Average Rectified (Io):
- 12A
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 12 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 1 µA @ 800 V
- Capacitance @ Vr, F:
- 78pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
- Operating Temperature - Junction:
- -55°C ~ 150°C
S12KCHR7G FAQ
1.How can I place an order for S12KCHR7G through Aetrix?
Please submit a Request for Quotation (RFQ) for S12KCHR7G 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 S12KCHR7G reliable?
The price and inventory of S12KCHR7G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S12KCHR7G is usually 5 days.
3.What payment methods are accepted for S12KCHR7G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S12KCHR7G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S12KCHR7G?
S12KCHR7G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S12KCHR7G 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 S12KCHR7G?
For technical support, including S12KCHR7G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S12KCHR7G requirements.
6.How does Aetrix verify that S12KCHR7G is sourced from the original manufacturer or authorized distributors?
All S12KCHR7G 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 S12KCHR7G meets industry standards.
7.What is the process for return or replacement of S12KCHR7G?
All S12KCHR7G units undergo pre-shipment inspection (PSI). If there is an issue with S12KCHR7G, 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 S12KCHR7G part is unused and in its original packaging.
Return procedure for S12KCHR7G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
S12KCHR7G Tags
-
1N4448X-TP
Micro Commercial Co
-
1N4148WX-TP
Micro Commercial Co
-
1N4148TR
onsemi
-
MMSD4148T1G
onsemi
-
MMBD914LT3G
onsemi
-
BAS16HT1G
onsemi
-
1N914BWT
onsemi
-
BAS21LT1G
onsemi
-
LL4148
onsemi
-
BAS16LT1G
onsemi
-
MMSD914T1G
onsemi
-
BAV21W-7-F
Diodes Incorporated
Tech Hub
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
