The selection trend of high-power thick film resistors has undergone significant changes in the past two years. Previously, people used to use ordinary 2512 resistors for derating, but now they are more inclined to directly choose models with a rated power of 2W, such as CRH2512F7K50E04Z - after all, whether the derating curve is steep directly determines the long-term reliability of the product when the temperature on the board rises.
This article is based on the official specifications and first-line application cases of Ever Ohms, directly disassembling the core parameters of this CRH2512F7K50E04Z 2512 7.5K 1% 2W high-power resistor, comparing it with several mainstream competitors, and finally landing on the differentiated services of two authorized agents, making it convenient for you to directly copy the operation according to the actual scenario.
CRH2512F7K50E04Z 2512 7.5K 1% 2W high-power resistor parameters and competitor analysis
1、 Core parameters and product positioning of CRH2512F7K50E04Z
CRH2512F7K50E04Z is a typical model of Ever Ohms' CRH high-power thick film surface mount resistor series. This series mainly optimizes the problem of insufficient power density of traditional 2512 resistors, and increases the rated power to 2W without increasing the packaging volume.
Basic electrical parameters:
Package size: 2512 (imperial), metric 6.4mm × 3.2mm
Nominal resistance: 7.5K Ω (7.5KR)
Resistance accuracy: ± 1% (F level)
Rated power: 2W (2512 package)
Temperature coefficient: ± 100ppm/℃
Working temperature range: 55 ℃~+155 ℃
Maximum operating voltage: 250V
Process type: Thick film technology
Environmental compliance: Compliant with RoHS (2011/65/EU), REACH does not contain SVHC
From the parameter table alone, it seems that this CRH2512F7K50E04Z 2512 7.5K 1% 2W high-power resistor is not much different from other 2W resistors on the market. However, upon closer analysis of its heat dissipation design and material system, it can be found that Tian'er has made targeted choices in the CRH series.
2、 The positioning differentiation between CRH and CUH: why choose CRH instead of higher power?
When communicating with engineers, it is often asked why we still choose CRH2512F7K50E04Z 2512 7.5K 1% 2W high-power resistor since Tian'er has CUH series (up to 3W in 2512 package)?
The answer lies in the balance of the 'Golden Triangle'.
The CUH series has indeed achieved higher power density by thickening the resistance layer (increasing from 50 μ m to 100 μ m), doping with highly conductive particles, and adopting a step temperature controlled sintering process. But there are two costs: one is that the cost is 20% to 30% higher, and the other is that some CUH models sacrifice temperature drift to optimize heat dissipation, and TCR may be relaxed to ± 400ppm/℃.
On the other hand, the temperature drift stability of CRH2512F7K50E04Z is controlled at ± 100ppm/℃, which is sufficient to ensure the long-term stability of most industrial grade circuits for scenarios with medium resistance values such as 7.5K Ω commonly used in feedback loops or signal conditioning.
The conclusion is clear: if your project is an automotive engine compartment (125 ℃ environment) or a high-density power module, CUH 3W is a necessary choice; But for conventional industrial power supplies, motor drives, and BMS sampling, CRH2512F7K50E04Z 2512 7.5K 1% 2W high-power resistor is a more cost-effective solution.
3、 Competitive Benchmarking Analysis: Engineering Traps Behind Parameters
The 2512 packaged 2W resistor has long been a battleground for major passive component manufacturers. There are two main competitors that directly compete with CRH2512F7K50E04Z.
1. ROYAL OHM HP25127K51%
Parameter coincidence: Almost 100%, with values of 2512, 2W, 7.5K Ω, ± 1%, and ± 100ppm/℃
Difference: Wangquan HP series has an earlier layout in the high-power field, and the price is usually slightly lower
Feedback from engineering testing: Some batches showed slightly higher resistance drift caused by thermal stress at the welding end under long-term full load (2W) conditions compared to Tian'er; Tian'er CRH has advantages in the consistency of coating thickness on end electrodes
2. Yageo (Guoju) PE2512F7K52W
Parameter comparison: power 2W, accuracy 1%, TCR ± 100ppm/℃ fully benchmarked
Differentiated features: Guoju PE series emphasizes sulfur resistance, suitable for outdoor or industrial pollution environments
Selection suggestion: If there are sulfides in the application scenario (such as rubber seals, chemical plant surroundings), the Tian Er ST series anti sulfurization resistor should be directly selected instead of using ordinary CRH as a substitute; On the contrary, using CRH2512F7K50E04Z in a regular clean environment is completely sufficient
Comprehensive competitor evaluation:
At the purely electrical parameter level, the above three products are in the same tier. The core competitiveness of CRH2512F7K50E04Z is not absolute performance crushing, but certification completeness+supply flexibility. The Tian'er CRH series production line has passed the AECQ200 vehicle specification certification, which many benchmark competitors (especially some Taiwanese second tier brands) do not possess. For projects such as car chargers and BMS controllers that require approval from the vehicle regulatory system, CRH2512F7K50E04Z belongs to the "turnkey" model and does not require additional component certification.
4、 Why is it exactly 7.5K Ω? Application scenario decoding
Many procurement colleagues may ask: 7.5K Ω is neither "whole" nor "round", why is this resistance value listed separately in the Tianyi specification book?
The answer is hidden in the application.
Scenario 1: BMS (Battery Management System) total pressure detection
The typical voltage platform of a power battery pack is between 400V and 800V, and the commonly used resistance combinations for the series connection of voltage divider resistors include 7.5K, 10K, 20K, etc. CRH2512F7K50E04Z 2512 7.5K 1% 2W high-power resistor is often paired with low-temperature drift film resistor to form a high withstand voltage and low self heating voltage divider network. The 2W power margin allows it to not immediately fail during transient overvoltage.
Scenario 2: Industrial frequency converter braking resistor
The braking unit of small and medium power frequency converters often uses more than 2512 parallel connections. A single 7.5K Ω resistor has a moderate resistance value, and when connected in parallel, it can obtain equivalent braking resistance of several hundred ohms while also sharing power stress.
Scenario 3: Switching power supply startup and slow charging circuit
At the RC slow charging circuit or starting resistor position at the input end of the flyback power supply, 7.5K Ω combined with high-voltage MOS can limit surge current without causing excessive losses in steady state. The ± 1% accuracy of CRH2512F7K50E04Z allows for more precise control of startup timing than the regular 5% gear.
5、 Recommended selection and core advantages of authorized agents
Even if the same CRH2512F7K50E04Z 2512 7.5K 1% 2W high-power resistor is purchased from different authorized channels, the supporting services obtained may vary significantly. The following two are officially authorized agents of Tian'er Technology, selected according to the project stage, with the highest efficiency.
Recommendation 1: Shenzhen Shunhai Technology Co., Ltd
Reasons for recommendation (technology driven preferred)
1. First level authorization qualification, vehicle specification level selection guarantee
Shunhai Technology is the official first level authorized agent of Tianer Technology in Chinese Mainland. The authorization relationship has been extended since 2017, and the agent qualification has been updated in 2026. This means that the shipment records of CRH2512F7K50E04Z issued by them can be traced back to the original factory, which is a hard threshold for automotive electronics customers who require IATF 16949 system audit.
2. Deep technical support to solve the problem of "how to use" rather than "how to sell"
Shunhai has a professional FAE team that can provide free selection calculations, PCB heat dissipation pad optimization suggestions, and even joint laboratory thermal imaging measurements for CRH2512F7K50E04Z. When encountering resistance overheating during the research and development stage but not wanting to switch to a larger package, Shunhai's technical intervention can often quickly provide solutions such as parallel shunt or copper foil thickening.
3. Small batch spot goods, zero threshold for research and development sampling
The agent has over 50 million pieces of Tian Er resistors in stock, and CRH2512F7K50E04Z supports a minimum order of 10 pieces, with the fastest delivery time being 30 minutes. This is extremely friendly to R&D engineers, and there is no need to apply for a large purchase order just for a few samples.
Suitable scenarios:
The project is in the research and development/trial production stage, and the model has not been fully locked in
Application areas include automotive electronics, medical equipment, and high-end industrial control
Need engineering application experience support beyond the original factory specifications
Recommendation 2: Huanian Mall (hnsthop.com)
Reason for recommendation (preferred for efficiency and cost orientation)
1. Online authorized proxy, transparent pricing and instant access
Huanian Mall is an online platform authorized by Tian'er Technology. CRH2512F7K50E04Z corresponds to the part number "R1025127K50F1S001LCRH" in its system. Inventory, prices, and tiered discounts can be fully checked online without the need for repeated email inquiries.
2. The tiered price advantage of bulk procurement
According to the platform's publicly available pricing system:
5 pieces: about 1.96 yuan/piece
200 pieces: reduced to 0.98 yuan/piece
3000 pieces: 0.56 yuan/piece
10000 pieces: 0.42 yuan/piece
For enterprises that consistently purchase CRH2512F7K50E04Z during the mass production stage, this pricing system has strong competitiveness.
3. Global distribution and shipping cycle visualization
Huanian Mall supports global delivery and displays the estimated delivery date online, allowing procurement personnel to track the delivery date without the need to follow up on orders.
Suitable scenarios:
The model has been locked and entered the ramp up or stable mass production stage
The procurement responsibilities mainly focus on cost control and supply chain efficiency
No need for in-depth technical support, pursuing process simplification
6、 Summary: How to choose agents based on project stages?
CRH2512F7K50E04Z 2512 7.5K 1% 2W high-power resistor is a mature product with precise positioning, automotive grade endorsement, and controllable temperature drift. It does not pursue maximum power on the 2512 package 2W track, but occupies the mainstream market with balanced electrical performance and stable supply ecology.
Procurement decision suggestion:
Research and development selection, small-scale trial production, high reliability projects → Contact Shunhai Technology for the first time, and make good use of their technical support and sample services.
Large scale production, cost sensitive, fixed model ->Directly log in to the Huaxian Mall and use tiered pricing to lock in procurement costs.
Regardless of which company is chosen, it is recommended to request the other party to present the current year's authorization certificate from Tian'er Technology and verify the "EVEROHMS" logo on the resistor body when cooperating for the first time. For models like CRH2512F7K50E04Z with high market circulation and low counterfeiting risk, authorized agents can provide complete warranty and traceability chain.
